CN221967925U - Hand-held nail feeding and tightening module and nail screwing gun - Google Patents

Abstract

The utility model provides a handheld nail feeding and screwing module and a nail screwing gun, wherein the handheld nail feeding and screwing module comprises a cylinder body, a gun head, a vacuum tube, a screwdriver head and a first quick-dismantling structure; the batch head, the vacuum tube and the cylinder body are nested in sequence from inside to outside; the first quick release structure includes: the quick-change female head, the first sleeve and the plurality of first steel balls; the first sleeve is sleeved on the quick-change female head; the quick-change female head is provided with a plurality of first guide holes; the first steel balls are arranged in the first guide holes; the gun head is provided with a quick-change male head, and the peripheral surface of the proximal end of the quick-change male head is provided with a plurality of arc-shaped grooves; the quick-change male head is in plug-in fit with the quick-change female head, so that the first steel ball is clamped between the first sleeve and the arc-shaped groove, and the quick-change male head and the quick-change female head are clamped; pushing the first sleeve towards the proximal end and pulling the gun head towards the distal end to enable the first steel balls to move outwards so as to enable the quick-change male head and the quick-change female head to be loosened; the hand-held nail feeding and tightening module can realize quick replacement of gun heads.

Description

Handheld nail feeding and tightening module and nail gun

Technical Field

The utility model belongs to the technical field of mechanical equipment, and particularly relates to a handheld nail feeding and tightening module.

Background Art

The existing automatic nail feeding and tightening modules on the market are generally external standard cylinders with standard linear guides. This type of module has a simple design, a large size, and a heavy weight. Since there are moving parts connected to the outside, there are certain risks for operators during use.

The prior art has the following disadvantages:

Due to the existence of external moving parts, it is somewhat dangerous and cannot be operated by hand; it is heavy and large in size and generally cannot be used on collaborative robots; it is difficult to achieve quick replacement of gun tips, vacuum tubes, and screwdriver bits.

Utility Model Content

In view of the above problems existing in the prior art, the utility model provides a handheld module which is simple and lightweight in structure, easy to assemble, safe and reliable and can realize quick replacement of components.

To achieve the above purpose, the technical solution adopted by the embodiment of the utility model is:

On the one hand, a handheld nail feeding and tightening module is provided, comprising a cylinder body, a gun head, a vacuum tube, a screwdriver bit and a first quick-release structure; the screwdriver bit, the vacuum tube and the cylinder body are nested in sequence from the inside to the outside; the screwdriver bit and the vacuum tube are connected to the cylinder body through their respective proximal ends respectively; the proximal end of the screwdriver bit extends from the proximal end of the vacuum tube; the first quick-release structure comprises: a quick-change female head, a first sleeve and a plurality of first steel balls; the first sleeve is sleeved on the quick-change female head; the proximal end of the quick-change female head is connected to the distal end of the cylinder body; the quick-change female head is provided with a plurality of first guide holes penetrating the side wall near the distal end thereof; The first steel ball is installed in the first guide hole; the gun head is provided with a quick-change male head, and the outer peripheral surface of the quick-change male head at its proximal end is provided with a plurality of arc-shaped grooves matching the first guide hole of the quick-change female head; the quick-change male head is plugged into the quick-change female head, and the inner wall of the first sleeve squeezes the first steel ball, so that the first steel ball is clamped between the first sleeve and the arc-shaped groove, and the quick-change male head and the quick-change female head are engaged; the first sleeve is pushed toward the proximal end, and the gun head is pulled toward the distal end, and the outer wall of the quick-change male head squeezes the first steel ball, so that the first steel ball moves outward, so that the quick-change male head and the quick-change female head are loosened.

In some embodiments of the present invention, a first blocking ring is provided at an end of the first guide hole close to the quick-change female head, and the first blocking ring extends inwardly along the edge of the opening of the first guide hole.

In some embodiments of the utility model, a raised ring is provided on the inner wall of the first sleeve near the distal end, which is used to form an accommodating gap between the first sleeve and the plane where the opening of the first guide hole is located; the surface of the raised ring facing the distal end is set as an inclined surface that gradually expands outward from the proximal end to the distal opening.

In some embodiments of the utility model, the first quick-release structure also includes a first spring; the first spring is sleeved on the quick-change female head in the accommodating gap; the two ends of the first spring respectively abut against the raised ring of the first sleeve and the distal end of the cylinder body.

In some embodiments of the utility model, the handheld nail feeding and tightening module also includes a second quick-release structure; the second quick-release structure includes: a connecting column, a second sleeve and a plurality of second steel balls; the second sleeve is sleeved on the connecting column; the proximal end of the connecting column is connected to the piston arranged in the cylinder body; the connecting column has a countersunk hole axially arranged at its distal end; the countersunk hole has a plurality of second guide holes penetrating the side wall near the distal end; the second steel ball is installed in the second guide hole; the screwdriver bit is provided with an annular groove corresponding to the second guide hole on the outer peripheral surface near the proximal end thereof; the screwdriver bit is plugged into the countersunk hole through its proximal end; the inner wall of the second sleeve squeezes the second steel ball, so that the second steel ball is clamped between the second sleeve and the annular groove, and the connecting column is engaged with the screwdriver bit; the second sleeve is pushed toward the proximal end, and the screwdriver bit is pulled toward the distal end, the outer peripheral surface of the screwdriver bit squeezes the second steel ball, and the second steel ball moves outward, so that the screwdriver bit is loosened from the connecting column.

In some embodiments of the present invention, a second blocking ring is provided at one end of the second guide hole close to the counterbore, and the second blocking ring extends inwardly along the edge of the opening of the second guide hole.

In some embodiments of the utility model, an annular boss corresponding to the countersunk hole is provided on the inner wall of the second sleeve near the middle thereof to form a gap between the second sleeve and the connecting column; the second steel ball is clamped between the annular boss and the annular groove; the surface of the annular boss facing the distal end is set as an inclined surface that gradually expands from the proximal end to the distal opening; the second sleeve is pushed toward the proximal end to form a gap for the second steel ball to move between the inclined surface of the annular boss and the surface where the opening of the second guide hole is located.

In some embodiments of the utility model, the second quick-release structure includes a second spring; the second spring is sleeved on the connecting column in the interval; the connecting column is provided with an outer convex ring on its outer circumferential surface close to the distal end, and the outer convex ring extends radially outward along the outer circumferential surface of the connecting column; the second sleeve is provided with a first inner convex ring matching the outer convex ring on its inner wall close to the distal end of the annular boss, and the second sleeve is provided with a second inner convex ring on its inner wall close to the proximal end of the annular boss; the outer convex ring abuts against the first inner convex ring; the second inner convex ring abuts against the distal end of the second spring.

In some embodiments of the utility model, the handheld nail feeding and tightening module also includes a third quick-release structure; the third quick-release structure includes: a pin and a guide groove formed on the proximal side wall of the second sleeve; the pin is arranged on the surface of the vacuum tube close to the proximal end; the guide groove includes a first guide section, an intermediate section and a second guide section that are connected in sequence and are together constructed into an "n"-shaped structure; wherein the first guide section and the second guide section are parallel to the axis of the second sleeve; the free end of the first guide section extends to the distal edge of the second sleeve and forms an open end with a notch; the end of the second guide section forms a closed end; the pin is embedded in the open end of the guide groove and moves to the closed end so that the vacuum tube and the second sleeve are locked.

On the other hand, the utility model also provides a nail gun, including the handheld nail feeding and tightening module; and also includes an external drive device, and the external drive device is connected to the proximal end of the cylinder body.

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

The handheld module of the embodiment of the utility model,

Safe, handheld operation, lightweight, can be used on small collaborative robots, and efficient, allowing for quick replacement of wearing parts.

BRIEF DESCRIPTION OF THE DRAWINGS

In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar parts. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the specification and claims, are used to illustrate the disclosed embodiments. When appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

FIG1 is a perspective schematic diagram of a handheld nail feeding and tightening module according to an embodiment of the utility model;

FIG2 is a top view of a handheld nail feeding and tightening module according to an embodiment of the utility model;

FIG3 is a cross-sectional view of a handheld nail feeding and tightening module according to an embodiment of the utility model;

FIG4 is a partial enlarged view of I in FIG3;

FIG5 is a partial enlarged view of II in FIG3;

FIG6 is an exploded view of a handheld nail feeding and tightening module according to an embodiment of the utility model;

FIG7 is a partial exploded view of a handheld nail feeding and tightening module according to an embodiment of the utility model;

FIG8 is a schematic structural diagram of a handheld nail feeding and tightening module according to an embodiment of the utility model;

FIG9 is a partial enlarged view of III in FIG8 ;

FIG. 10 is a schematic structural diagram of a nail gun according to an embodiment of the utility model.

Description of Reference Numerals

1-bit; 11-ring groove;

2- Vacuum tube;

3-gun head; 31-quick-change male head; 32-arc groove;

4-first quick-release structure; 41-quick-change female head; 42-first spring; 43-first sleeve;

44-first steel ball; 45-first guide hole; 46-raised ring;

5-second quick release structure; 51-second spring; 52-connecting column; 53-second sleeve;

54-second steel ball; 55-counterbore; 56-second guide hole; 57-outer convex ring; 581-first inner convex ring;

582-second inner convex ring; 59-annular boss;

6-third quick release structure; 61-pin; 62-guide groove;

7-External drive device;

8-Cylinder block.

DETAILED DESCRIPTION

Below, the specific embodiments of the present invention are described in detail in conjunction with the accompanying drawings, but are not intended to limit the present invention. In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods. Below, the embodiments of the present invention are further described in detail in conjunction with the accompanying drawings and specific embodiments, but are not intended to limit the present invention.

All terms (including technical terms or scientific terms) used in the present disclosure have the same meanings as those understood by ordinary technicians in the field to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

The following directional terms are involved in the present invention, such as the distal end and the proximal end, relative to the operator. The proximal end refers to the part of the mechanical structure that is close to the operator and can be directly operated and controlled by the operator, such as the handle used to hold the cylinder, which is the interactive interface between the operator and the mechanical structure; while the distal end refers to the part of the mechanical structure that is far away from the operator and is also the part of the actuator; in the embodiment of the present invention, the distal end is the end used to clamp the screw.

At present, the existing automatic nail feeding and tightening modules on the market are generally characterized by external standard cylinders and standard linear guides. This module has a simple design, a large size, a heavy weight, is not easy to operate by hand, and cannot smoothly and quickly replace related components. Therefore, the utility model provides the following solutions:

On the one hand, an embodiment of the utility model provides a handheld nail feeding and tightening module, which, in combination with Figures 1 to 3, Figures 6 and 7, includes a cylinder body 8, a gun head 3, a vacuum tube 2, a screwdriver bit 1 and a first quick-release structure 4; the screwdriver bit 1, the vacuum tube 2 and the cylinder body 8 are nested in sequence from the inside to the outside; the screwdriver bit 1 and the vacuum tube 2 are respectively connected to the cylinder body 8 through their respective proximal ends; the proximal end of the screwdriver bit 1 extends from the proximal end of the vacuum tube 2; the first quick-release structure 4 includes: a quick-change female head 41, a first sleeve 43 and a plurality of first steel balls 44; the first sleeve 43 is sleeved on the quick-change female head 41; the proximal end of the quick-change female head 41 is connected to the distal end of the cylinder body 8; the quick-change female head 41 is provided with a through-side wall on its side wall near the distal end The first guide holes 45 are provided in the gun head 3. The first steel ball 44 is installed in the first guide hole 45. The gun head 3 is provided with a quick-change male head 31. The outer peripheral surface of the quick-change male head 31 at its proximal end is provided with a plurality of arc grooves 32 matching the first guide holes 45 of the quick-change female head 41. The quick-change male head 31 is plugged into the quick-change female head 41, and the inner wall of the first sleeve 43 squeezes the first steel ball 44, so that the first steel ball 44 is clamped between the first sleeve 43 and the arc groove 32, and the quick-change male head 31 and the quick-change female head 41 form a clamping engagement. The first sleeve 43 is pushed toward the proximal end, and the gun head 3 is pulled toward the distal end. The outer wall of the quick-change male head 31 squeezes the first steel ball 44, so that the first steel ball 44 moves outward, so that the quick-change male head 31 and the quick-change female head 41 are loosened.

In the above embodiment, the first sleeve 43 and the gun head 3 are manipulated, and the engagement connection between the quick-change male head 31 and the quick-change female head 41 is unlocked to achieve rapid disassembly of the quick-change male head 31 .

Furthermore, the first guide hole 45 is provided with a first blocking ring (not shown in the figure) at one end thereof close to the quick-change female head 41, and the first blocking ring extends inwardly along the edge of the opening of the first guide hole 45. With this arrangement, after the quick-change male head 31 is disassembled, the first blocking ring can prevent the first steel ball 44 from sliding out of the first guide hole 45, so that the first steel ball 44 is always kept in the first guide hole 45.

Further, in conjunction with FIG. 3 and FIG. 4 , a protruding ring 46 is provided on the inner wall of the first sleeve 43 near the distal end, which is used to form an accommodation gap between the first sleeve 43 and the plane where the opening of the first guide hole 45 is located; the surface of the protruding ring 46 facing the distal end is set as an inclined surface that gradually expands outward from the proximal end to the distal end opening. Through this setting, during the process of disassembling the quick-change male head 31, the quick-change male head 31 is pulled outward, and at this time, a transition gap is formed between the inner surface of the protruding ring 46 of the first sleeve 43 near the distal end opening and the plane where the opening of the first guide hole 45 is located, so that the first steel ball 44 moves in the first guide hole 45 toward the first sleeve 43, until the first steel ball 44 is exposed at the end facing the quick-change male head 31. The spherical surface is completely retracted into the first guide hole 45, and the quick-change male head 31 is pulled toward the distal end, so that it can be smoothly removed from the quick-change female head 41, so as to replace the quick-change male head 31.

Further, in combination with FIG. 3 and FIG. 4 , the first quick-release structure 4 further includes a first spring 42; the first spring 42 is sleeved on the quick-change female head 41 in the accommodation gap; the two ends of the first spring 42 are respectively against the protruding ring 46 of the first sleeve 43 and the distal end of the cylinder body 8. Through this arrangement, the first spring 42 always applies a force to the first sleeve 43, and in the assembled state, the protruding ring 46 is located at the opening of the first guide hole 45, so that the protruding ring 46 applies a force to the first steel ball 44, so that a part of the spherical surface of the first steel ball 44 protrudes from the first guide hole 45 toward the opening of one end of the quick-change male head 31, and is embedded in the arc groove 32, so that the quick-change male head 31 and the quick-change female head 41 are engaged. In addition, after the quick-change male head 31 is assembled or disassembled, the first spring 42 can reset the first sleeve 43.

Further, in combination with FIG. 3 and FIG. 5, the handheld nail feeding and tightening module further includes a second quick-release structure 5; the second quick-release structure 5 includes: a connecting column 52, a second sleeve 53 and a plurality of second steel balls 54; the second sleeve 53 is sleeved on the connecting column 52; the proximal end of the connecting column 52 is connected to the piston disposed in the cylinder body 8; the connecting column 52 has a countersunk hole 55 axially formed at its distal end; the countersunk hole 55 has a plurality of second guide holes 56 penetrating the side wall near the distal end; the second steel balls 54 are installed in the second guide holes 5 6; the outer peripheral surface of the bit 1 near its proximal end is provided with an annular groove 11 corresponding to the second guide hole 56; the bit 1 is plugged into the countersunk hole 55 through its proximal end; the inner wall of the second sleeve 53 squeezes the second steel ball 54, so that the second steel ball 54 is sandwiched between the second sleeve 53 and the annular groove 11, and the connecting column 52 is engaged with the bit 1; the second sleeve 53 is pushed toward the proximal end, and the bit 1 is pulled toward the distal end, and the outer peripheral surface of the bit 1 squeezes the second steel ball 54, and the second steel ball 54 moves outward, so that the bit 1 and the connecting column 52 are loosened. In this embodiment, the bit 1 is quickly disassembled by manipulating the unlocking of the engaging connection between the connecting column 52 and the bit 1.

In the above embodiment, a key connection is formed between the connecting column 52 and the second sleeve 53, so that the second sleeve 53 can slide axially relative to the connecting column 52. The specific connection structure is not specifically limited here, and it is assumed that the second sleeve 53 can slide relative to the connecting column 52.

Furthermore, the second guide hole 56 is provided with a second blocking ring (not shown in the figure) at one end thereof close to the counterbore 55, and the second blocking ring extends inwardly along the edge of the opening of the second guide hole 56. In this embodiment, since the second blocking ring has the same function and effect as the first blocking ring, no further description is given.

Further, in combination with Figures 3 and 5, an annular boss 59 corresponding to the countersunk hole 55 is provided on the inner wall of the second sleeve 53 near the middle thereof to form a gap between the second sleeve 53 and the connecting column 52; the second steel ball 54 is clamped between the annular boss 59 and the annular groove 11; the surface of the annular boss 59 facing the distal end is set as an inclined surface that gradually expands from the proximal end to the distal end opening; the second sleeve 53 is pushed toward the proximal end to form a gap for the second steel ball 54 to move between the inclined surface of the annular boss 59 and the surface where the opening of the second guide hole 56 is located.

In the above embodiment, through this arrangement, during the process of disassembling the bit 1, the second sleeve 53 is pushed toward the proximal end to form a gap for the second steel ball 54 to move between the inclined surface of the annular boss 59 and the surface where the opening of the second guide hole 56 is located, so that the second steel ball 54 moves in the second guide hole 56 toward the second sleeve 53 until the part of the spherical surface of the second steel ball 54 exposed at the end facing the bit 1 is completely retracted into the second guide hole 56, and the bit 1 is pulled toward the distal end, so that the bit 1 can be smoothly disengaged from the connecting column 52 and detached from the cylinder body 8, so as to replace the bit 1.

Further, referring to Figure 5, the second quick-release structure 5 includes a second spring 51; the second spring 51 is sleeved on the connecting column 52 in the interval; the connecting column 52 is provided with an outer convex ring 57 on its outer circumferential surface near the distal end, and the outer convex ring 57 extends radially outward along the outer circumferential surface of the connecting column 52; the second sleeve 53 is provided with a first inner convex ring 581 matching the outer convex ring 57 on its inner wall near the distal end of the annular boss 59, and the second sleeve 53 is provided with a second inner convex ring 582 on its inner wall near the proximal end of the annular boss 59; the outer convex ring 57 is abutted against the first inner convex ring 581; the second inner convex ring 582 is abutted against the distal end of the second spring 51.

In the above embodiment, the first inner convex ring 581 plays a role in blocking the second sleeve 53 from moving toward the distal end; by setting the second inner convex ring 582, the second spring 51 always applies a force to the second sleeve 53 through the second inner convex ring 582, and in the assembled state, the annular boss 59 is located at the opening of the second guide hole 56, so as to apply a force to the second steel ball 54 through the annular boss 59, so that a part of the spherical surface of the second steel ball 54 extends from the second guide hole 56 toward the opening at one end of the connecting column 52, and is embedded in the counterbore 55, so that the screwdriver 1 and the connecting column 52 are engaged. In this embodiment, the first inner convex ring 581, the second inner convex ring 582 and the annular boss 59 can also be set to be integrally formed. In addition, after the screwdriver 1 is assembled or disassembled, the second spring 51 can reset the second sleeve 53.

Further, in combination with Figures 8 and 9, the handheld nail feeding and tightening module also includes a third quick-release structure 6; the third quick-release structure 6 includes: a pin 61 and a guide groove 62 formed on the proximal side wall of the second sleeve 53; the pin 61 is arranged on the surface of the vacuum tube 2 close to the proximal end; the guide groove 62 includes a first guide section, an intermediate section and a second guide section which are connected in sequence and are together constructed into an "n"-shaped structure; wherein the first guide section and the second guide section are parallel to the axis of the second sleeve 53; the free end of the first guide section extends to the distal edge of the second sleeve 53 and forms an open end with a notch; the end of the second guide section forms a closed end; the pin 61 is embedded in the open end of the guide groove 62 and moves to the closed end so that the vacuum tube 2 is locked with the second sleeve 53. In this embodiment, in the unlocked state, the pin 61 is pushed along the guide groove 62 from the closed end to the open end to unlock the connection between the vacuum tube 2 and the second sleeve 53, and the vacuum tube 2 is removed from the second sleeve 53, thereby removing the vacuum tube 2 from the cylinder body 8.

It should be noted that the disassembly process of the handheld nail feeding and tightening module of the embodiment of the utility model is usually to first disassemble the gun head 3 so that the distal ends of the screwdriver bit 1 and the vacuum tube 2 are exposed outside the cylinder body 8, which is convenient for disassembling the screwdriver bit 1 and the vacuum tube 2; in the process of disassembling the screwdriver bit 1 and the vacuum tube 2, it is usually not necessary to distinguish the order of precedence, but in this embodiment, referring to Figure 5, since the screwdriver bit 1 is provided with a neck near the proximal end, the screwdriver bits 1 nested in each other cannot be pulled out from the vacuum tube 2 to the distal end, and the vacuum tube 2 needs to be disassembled first, and then the screwdriver bit 1. The detailed details of the disassembly have been described above, and no further elaboration is made here. The assembly process of the embodiment of the utility model is exactly the opposite of the disassembly order, and the screwdriver bit 1, the vacuum tube 2 and the gun head 3 are installed in sequence. The detailed process is not repeated here.

On the other hand, the utility model also provides a nail gun, see FIG. 10 , including a handheld nail feeding and tightening module; and also including an external drive device 7 , which is connected to the proximal end of a cylinder body 8 .

In addition, although illustrative embodiments are described herein, the scope includes any and all embodiments having equivalent elements, modifications, omissions, combinations (e.g., combinations of schemes across various embodiments), adjustments, or variations based on the present disclosure. The elements in the claims are to be interpreted broadly based on the language used in the claims and are not limited to the examples described in this specification or during the continuation of this application. In addition, the steps of the disclosed methods may be modified in any way, including by reordering steps or inserting or deleting steps. Therefore, it is intended that the description be viewed merely as an example, with the true scope being represented by the following claims and their full range of equivalents.

The above description is intended to be illustrative and not restrictive. For example, the above examples (or one or more aspects thereof) may be used in combination with each other. After reading the above description, other embodiments may be used by a person of ordinary skill in the art, for example. Moreover, in the above detailed description, various features may be combined together to simplify the present disclosure. This should not be interpreted as intending that the disclosed features that are not requested for protection are essential to any claim. Therefore, the following claims are incorporated into the specific implementation as examples or embodiments, wherein each claim itself is a separate embodiment, and it is expected that these embodiments may be combined with each other in various combinations or permutations. The scope of the present utility model should be determined with reference to the attached claims and the full scope of equivalents given by these claims.

Claims (10)

1. A handheld nail feeding and tightening module, characterized in that it comprises a cylinder body, a gun head, a vacuum tube, a screwdriver bit and a first quick-release structure; the screwdriver bit, the vacuum tube and the cylinder body are nested in sequence from the inside to the outside; the screwdriver bit and the vacuum tube are connected to the cylinder body through their respective proximal ends; the proximal end of the screwdriver bit extends from the proximal end of the vacuum tube; The first quick-release structure comprises: a quick-change female head, a first sleeve and a plurality of first steel balls; the first sleeve is sleeved on the quick-change female head; The proximal end of the quick-change female head is connected to the distal end of the cylinder body; the quick-change female head is provided with a plurality of first guide holes penetrating the side wall near the distal end; the first steel ball is installed in the first guide hole; The gun head is provided with a quick-change male head, and the outer peripheral surface of the quick-change male head at its proximal end is provided with a plurality of arc-shaped grooves matching the first guide hole of the quick-change female head; The quick-change male head is plugged and matched with the quick-change female head, and the inner wall of the first sleeve squeezes the first steel ball, so that the first steel ball is clamped between the first sleeve and the arc-shaped groove, and the quick-change male head and the quick-change female head are clamped; The first sleeve is pushed toward the proximal end, and the gun head is pulled toward the distal end, so that the outer wall of the quick-change male head squeezes the first steel ball, causing the first steel ball to move outward, thereby loosening the quick-change male head and the quick-change female head. 2. The handheld nail feeding and tightening module according to claim 1 is characterized in that a first blocking ring is provided at the end of the first guide hole close to the quick-change female head, and the first blocking ring extends inward along the edge of the hole of the first guide hole. 3. The handheld nail feeding and tightening module according to claim 2 is characterized in that a raised ring is provided on the inner wall of the first sleeve near the distal end, which is used to form an accommodating gap between the first sleeve and the plane where the opening of the first guide hole is located; the surface of the raised ring facing the distal end is set as an inclined surface that gradually expands outward from the proximal end to the distal opening. 4. The handheld nail feeding and tightening module according to claim 3 is characterized in that the first quick-release structure also includes a first spring; the first spring is sleeved on the quick-change female head in the accommodating gap; the two ends of the first spring respectively abut against the raised ring of the first sleeve and the distal end of the cylinder body. 5. The handheld nail feeding and tightening module according to claim 1, characterized in that it also includes a second quick-release structure; the second quick-release structure includes: a connecting column, a second sleeve and a plurality of second steel balls; the second sleeve is sleeved on the connecting column; The proximal end of the connecting column is connected to the piston disposed in the cylinder body; the connecting column is provided with a countersink in the axial direction at its distal end; the countersink is provided with a plurality of second guide holes penetrating the side wall near the distal end; the second steel ball is installed in the second guide hole; The screwdriver bit is provided with an annular groove corresponding to the second guide hole on the outer peripheral surface near the proximal end thereof; The screwdriver bit is plugged into the countersunk hole through its proximal end; the inner wall of the second sleeve squeezes the second steel ball so that the second steel ball is sandwiched between the second sleeve and the annular groove, and the connecting column is engaged with the screwdriver bit; The second sleeve is pushed toward the proximal end, and the bit is pulled toward the distal end, so that the outer peripheral surface of the bit squeezes the second steel ball, and the second steel ball moves outward, so that the bit is loosened from the connecting column. 6. The handheld nail feeding and tightening module according to claim 5 is characterized in that the second guide hole is provided with a second blocking ring at one end thereof close to the countersunk hole, and the second blocking ring extends inwardly along the edge of the hole opening of the second guide hole. 7. The handheld nail feeding and tightening module according to claim 6 is characterized in that an annular boss corresponding to the countersunk hole is provided on the inner wall of the second sleeve near the middle thereof to form a gap between the second sleeve and the connecting column; the second steel ball is clamped between the annular boss and the annular groove; the surface of the annular boss facing the distal end is set as an inclined surface that gradually expands from the proximal end to the distal end; The second sleeve is pushed toward the proximal end to form a gap for the second steel ball to move between the inclined surface of the annular boss and the surface where the opening of the second guide hole is located. 8. The handheld nail feeding and tightening module according to claim 7, characterized in that the second quick-release structure comprises a second spring; the second spring is sleeved on the connecting column in the interval; the connecting column is provided with an outer convex ring on its outer circumference near the distal end, and the outer convex ring extends radially outward along the outer circumference of the connecting column; The second sleeve is provided with a first inner convex ring matching the outer convex ring on its inner wall close to the distal end of the annular boss, and the second sleeve is provided with a second inner convex ring on its inner wall close to the proximal end of the annular boss; The outer convex ring abuts against the first inner convex ring; the second inner convex ring abuts against the distal end of the second spring. 9. The handheld nail feeding and tightening module according to claim 5, characterized in that it also includes a third quick-release structure; the third quick-release structure includes: a pin and a guide groove formed on the proximal side wall of the second sleeve; The pin is arranged on the surface of the vacuum tube close to the proximal end; The guide groove comprises a first guide segment, a middle segment and a second guide segment which are connected in sequence and are jointly constructed into an "n"-shaped structure; wherein the first guide segment and the second guide segment are parallel to the axis of the second sleeve; the free end of the first guide segment extends to the distal edge of the second sleeve and forms an open end with a notch; the end of the second guide segment forms a closed end; The pin is embedded in the open end of the guide groove and moves to the closed end so that the vacuum tube and the second sleeve are locked. 10. A nail gun, characterized in that it comprises a handheld nail feeding and tightening module as described in any one of claims 1 to 9; and further comprises an external drive device, wherein the external drive device is connected to the proximal end of the cylinder body.