CN215878640U - Glue pressing gun with glue containing device gap fixing and eliminating device - Google Patents

Abstract

A glue gun with a glue containing device for determining a gap and eliminating a device comprises a gun body, a push rod, a push sheet, a push disc, a return spring, a trigger, a glue containing device and a backstop device, wherein the trigger is hinged with the gun body and is matched with a handle extending downwards at the rear part of the gun body to realize glue pressing action; the reset spring is sleeved on the pushing rod and arranged between the pushing sheet and the front end of the gun body; the backstop device is arranged at the rear end of the gun body and is sleeved on the pushing rod to stop the pushing rod; the glue containing device comprises a glue containing device connecting ring, the glue containing device connecting ring is connected with the gun body through a connecting piece and is pressed at the front end of the gun body, a limiting stop is arranged between the limiting end face of the connecting piece and the front end face of the gun body, and a gap eliminating device is arranged between the gun body or the connecting piece and the glue containing device connecting ring.

Description

Glue pressing gun with glue containing device gap fixing and eliminating device

Technical Field

The utility model belongs to the technical field of caulking guns, and particularly relates to a caulking gun with a glue containing device for determining a gap and an eliminating device.

Background

The existing glue pressing gun with the rotatable glue containing device comprises a gun body, a propelling device, a stopping device, a reset spring, the glue containing device and a connecting piece, wherein the upper part of the gun body is provided with a hollow frame for accommodating the propelling device and the reset spring, the front part and the rear part of the hollow frame are provided with a first through hole and a second through hole which are coaxial, the propelling device comprises a trigger, a propelling piece, a propelling rod and a propelling disc, the trigger is hinged with the gun body, the stopping device comprises a stopping piece and a stopping spring and is arranged outside the first through hole of the gun body, the propelling rod sequentially penetrates through the stopping device, the first through hole, the propelling piece, the reset spring and the second through hole from back to front, the glue containing device comprises a connecting ring for the connecting piece to penetrate through, the connecting piece is provided with a limiting end, and the glue containing device and the gun body are pressed together through the connecting piece in a pure manual or semi-automatic mode under the general condition in the assembling process, specifically, the connecting ring hole of the glue containing device is aligned to the screw hole at the front end of the gun body during assembly, then the connecting piece is screwed into the screw hole corresponding to the gun body through the screwing tool, and the glue containing device is connected with the gun body through the limiting end of the connecting piece in a press-fitting mode. The rotating hand feeling after the glue accommodating device is installed by a pure manual assembling mode is good, but the pure manual assembling mode is less and less at present due to the low assembling speed and the great labor intensity. The semi-automatic rotary mounting obviously reduces the labor intensity of assembly through auxiliary power, and the assembly speed is greatly improved. However, the depth of the connecting piece screwed into the screw hole of the gun body is not limited, so that the tightness of the connecting piece press-fitting glue accommodating device is inconsistent, the screwing depth of the connecting piece needs to be adjusted again in a purely manual mode, and the tightness of the connecting piece press-fitting glue accommodating device is adjusted to meet the requirements of existing damping and smoothness of rotation of the glue accommodating device, namely, when the glue accommodating device is pressed and pressed too tightly, the glue accommodating device is difficult to rotate, and the connecting piece needs to be correspondingly unscrewed; when the glue containing device is pressed and loosened, the glue containing device is very easy to rotate and also can move, and the connecting piece needs to be screwed correspondingly. The adjustment of the tightness or the tightness is required to be manually adjusted, so that the labor intensity of assembly is increased, the assembly efficiency is influenced, and the labor cost is high.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides the caulking gun with the glue containing device gap determining and eliminating device, which does not need to adjust the tightness of the glue containing device again, can rotate smoothly and has a damping effect.

The technical scheme adopted by the utility model is as follows:

a glue gun with a glue containing device for determining a gap and eliminating a device comprises a gun body, a push rod, a push sheet, a push disc, a reset spring, a trigger, a glue containing device and a backstop device, wherein the glue containing device is arranged at the front part of the gun body; the reset spring is sleeved on the pushing rod and arranged between the pushing sheet and the front end of the gun body; the backstop device is arranged at the rear end of the gun body and is sleeved on the pushing rod to stop the pushing rod; the stopping device includes stopping spring and stopping piece, the stopping piece is worn to establish on the pushing ram, and its upper end can support with the rear end of the rifle body, stopping spring suit lies in on the pushing ram between stopping piece and the rifle body rear end, hold the mucilage binding including holding the mucilage binding and circle, hold the mucilage binding and circle and pass through the connecting piece and be connected of the rifle body with its pressure equipment at the front end of the rifle body, its characterized in that: a limiting gear which can lead the glue containing device to keep a fixed axial clearance is arranged between the limiting end face of the connecting piece and the front end face of the gun body, and a clearance eliminating device which can prevent the glue containing device from moving axially is arranged between the gun body or the connecting piece and the connecting ring of the glue containing device. According to the utility model, the limiting stop is arranged between the connecting piece and the gun body, so that after the connecting piece presses and fits the glue containing device and the gun body in place at one time, the glue containing device keeps a fixed axial gap without regulating the tightness again; meanwhile, in order to prevent the glue containing device from axially moving due to gaps, the glue containing device is also provided with a gap eliminating device, so that the glue containing device achieves the assembling effect of smooth rotation and self-damping.

Furthermore, the limiting stopper is convexly arranged at the front end of the gun body, and the height of the limiting stopper is larger than the thickness of the connecting ring of the glue containing device. After the connecting piece is screwed in place, the limiting end face of the connecting piece is abutted against the outer end face of the limiting stop, so that the connecting ring of the rubber accommodating device keeps a fixed axial gap.

Or the limiting stopper is convexly arranged on the end face, facing the front end of the gun body, of the connecting piece, and the height of the limiting stopper is larger than the thickness of the connecting ring of the glue containing device. After the connecting piece is screwed in place, the outer end face of the limiting stop of the connecting piece is abutted against the front end face of the gun body, so that the connecting ring of the glue containing device keeps a fixed axial gap.

Or the limiting stop is a limiting check ring, the limiting check ring is arranged between the limiting end face of the connecting piece and the front end of the gun body, and the thickness of the limiting check ring is larger than that of the connecting ring of the glue containing device. After the connecting piece is screwed in place, two end faces of the limiting check ring respectively abut against the outer end face of the limiting stop of the connecting piece and the front end face of the gun body, so that the connecting ring of the glue containing device keeps a fixed axial gap.

Furthermore, a mute gasket is arranged between the connecting piece and the connecting ring of the glue containing device, so that the friction sound between the connecting piece and the glue containing device during rotation is eliminated.

Furthermore, the limiting check ring and the mute gasket are of an integrated structure, so that the installation is convenient.

Further, be threaded connection between connecting piece and the rifle body, establish reset spring holding hole in the connecting piece, reset spring's one end butt is in the inner in reset spring holding hole, its other end and propulsion piece butt, the middle part of connecting piece is equipped with the central through-hole that the pushing ram wore to establish, the connecting piece is equipped with and is used for the outside application of force to realize rotatory dress portion soon, dress portion soon is combination formula counter bore, the heavy groove of combination formula, hexagonal column or oblate column.

Furthermore, the external thread part of the connecting piece is provided with a die assembly gap avoiding part, so that the die assembly gap of the connecting piece for die opening processing is removed, and the production and assembly efficiency is improved.

Furthermore, the gap eliminating device is pressed in a counter bore of the front end face of the gun body by the rubber containing device connecting ring, the gap eliminating device comprises a pressure spring and a ball body, and the end face of the rubber containing device connecting ring is provided with an inwards concave positioning block which corresponds to the ball body. The connecting ring of the rubber containing device is abutted against the limiting end of the connecting piece through the counterforce of the pressure spring, so that the axial movement of the rubber containing device is eliminated. The arrangement of the concave positioning rail is convenient for the position of the glue containing device after rotation to keep stable.

Or the gap eliminating device is a magnetic body and is embedded in a counter bore at the limiting end of the connecting piece, and the connecting ring of the glue containing device is abutted against the limiting end of the connecting piece through magnetic attraction, so that the axial movement of the glue containing device is eliminated.

The utility model has the beneficial effects that:

1. a limit stop is arranged between the connecting piece and the gun body, so that after the connecting piece presses and fits the glue containing device and the gun body in place at one time, the glue containing device keeps a fixed axial gap without adjusting the tightness again; meanwhile, in order to prevent the glue containing device from axially moving due to gaps, the glue containing device is also provided with a gap eliminating device, so that the glue containing device achieves the assembling effect of smooth rotation and self-damping.

2. A mute gasket is arranged between the connecting piece and the connecting ring of the glue containing device, so that the friction sound between the glue containing device and the connecting piece when the glue containing device rotates is eliminated.

Drawings

FIG. 1 is an assembly schematic of the present invention;

FIG. 2 is a partial cross-sectional view of a first embodiment of the present invention;

FIG. 3 is a cross-sectional view A-A of a connector according to embodiments of the present invention;

FIG. 4 is a right side view of FIG. 3;

FIG. 5 is a partial cross-sectional view of a gun body according to an embodiment of the utility model;

FIG. 6 is a view from the direction B of FIG. 5;

FIG. 7 is a partial cross-sectional view of a second embodiment of the present invention;

FIG. 8 is a C-C cross-sectional view of a second connector according to an embodiment of the present invention;

FIG. 9 is a right side view of FIG. 8;

FIG. 10 is a partial cross-sectional view of a second gun body according to an embodiment of the utility model;

FIG. 11 is a view in the direction D of FIG. 10;

FIG. 12 is a partial cross-sectional view of a third embodiment of the present invention;

FIG. 13 is a cross-sectional view E-E of a triple connector of an embodiment of the present invention;

FIG. 14 is a right side view of FIG. 13;

FIG. 15 is a front view of a third retainer ring in accordance with an embodiment of the present invention;

FIG. 16 is a sectional view taken along line F of FIG. 15;

FIG. 17 is a partial cross-sectional view of a fourth embodiment of the present invention;

FIG. 18 is a front view of a four-piece squelch stop collar of an embodiment of the utility model;

FIG. 19 is a sectional view taken along line G of FIG. 18;

FIG. 20 is a partial cross-sectional view of example five of the present invention;

FIG. 21 is a sectional view in the direction J of a five-way mute thin check ring in accordance with an embodiment of the present invention;

FIG. 22 is a right side view of FIG. 21;

FIG. 23 is a partial cross-sectional view of a sixth embodiment of the present invention;

FIG. 24 is an N-directional view of a coupling ring of a six-glue-containing device in accordance with an embodiment of the present invention;

FIG. 25 is a sectional view taken along line L of FIG. 24;

FIG. 26 is an enlarged view of a portion of FIG. 25 at M;

FIG. 27 is a front view of an externally threaded swage portion of a seven connection fitting of an embodiment of the utility model;

fig. 28 is a partial sectional view of embodiment eight of the present invention.

In the figure, 1, a first gun body; 1' and a second gun body; 1a, a counter bore; 1b, a limit stop; 1c, an internal threaded hole; 2. a trigger; 3. a withdrawal stopping sheet; 4. a backstop spring; 5. a push rod; 6. a propulsion sheet; 7. a return spring; 8. a glue containing device; 81. the glue containing device is connected with the ring; 81a, an inner concave positioning rail; 9. a first anti-backlash device; 9' and a second anti-backlash device; 10. a first connecting member; 10', a second connecting piece; 10 ", a third connection; 10a, a central through hole; 10b, a return spring accommodating hole; 10c, an external thread part; 10d, a limiting end; 10e, a first screwing part; 10 e', a second screwing part; 10 e', a third screwing part; 10f, a mold closing seam avoiding part; 10g, a second connecting piece limiting stop, 11 and a propulsion disc; 12. a limit retainer ring; 12' integral type silence limit retainer ring, 13, silence packing ring.

Detailed Description

The present invention is further illustrated by the following examples, which are not intended to limit the utility model to these embodiments. It will be appreciated by those skilled in the art that the present invention encompasses all alternatives, modifications and equivalents as may be included within the scope of the claims.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example one

Referring to fig. 1-6, the embodiment provides a caulking gun with a glue container gap-fixing and eliminating device, which includes a first gun body 1, a push rod 5, a push sheet 6, a push disc 11, a return spring 7, a trigger 2, a glue container 8 and a backstop device, wherein the glue container 8 is installed at the front part of the first gun body 1, the trigger 2 is hinged to the first gun body 1 and cooperates with a downward extending handle at the rear part of the first gun body 1 to implement a caulking action, the push sheet 6 is installed inside the first gun body 1 and is pushed by the trigger 2 to move, the push rod 5 penetrates through the push sheet 6 from the rear end of the first gun body 1, the front end of the gun body extends into the glue container 8, and the push disc 11 is arranged at the front end of the push rod 5 and is located in the glue container 8; the reset spring 7 is sleeved on the push rod 5 and is arranged between the push sheet 6 and the front end of the first gun body 1; the backstop device is arranged at the rear end of the first gun body 1 and is sleeved on the push rod 5 to stop the push rod 5; the stopping device comprises a stopping spring 4 and a stopping sheet 3, the stopping sheet 3 is arranged on the pushing rod 5 in a penetrating mode, the upper end of the stopping sheet can abut against the rear end of the first gun body 1, and the stopping spring 4 is sleeved on the pushing rod 5 and located between the stopping sheet 3 and the rear end of the first gun body 1.

The glue containing device 8 comprises a glue containing device connecting ring 81, the glue containing device connecting ring 81 is connected with the first gun body 1 through a first connecting piece 10 and is pressed at the front end of the first gun body 1, a limiting stop 1b which enables the glue containing device 8 to keep a fixed axial gap is arranged between a limiting end face 10d of the first connecting piece 10 and the front end face of the first gun body 1, and a first gap eliminating device 9 which prevents the glue containing device 8 from moving axially is arranged between the first gun body 1 and the glue containing device connecting ring 81.

In this embodiment, the limiting stop 1b is protruded out of the front end of the first gun body 1, and the height of the limiting stop 1b is greater than the thickness of the connecting ring 81 of the glue container. After the first connecting piece 10 of the present invention is screwed to the position, the limit end face 10d of the first connecting piece 10 is abutted against the outer end face of the limit stop 1b, so that the glue-holding device connecting ring 81 maintains a fixed axial gap.

In this embodiment, the first connecting member 10 is in threaded connection with the first gun body 1, specifically, the first connecting member 10 is provided with an external threaded portion 10c, the front end of the first gun body 1 is provided with an internal threaded hole 1c, and the first connecting member 10 is in threaded connection with the first gun body 1 through the external threaded portion 10c and the internal threaded hole 1 c.

In the embodiment, a return spring accommodating hole 10b is formed in the first connecting member 10, one end of the return spring 7 abuts against the inner end of the return spring accommodating hole 10b, the other end of the return spring abuts against the pushing sheet 6, and a central through hole 10a through which the pushing rod 5 penetrates is formed in the middle of the first connecting member 10. The first connecting piece 10 is provided with a first screwing part 10e for realizing rotation by external force application, and the first screwing part 10e is a combined counter bore or a combined counter sink.

In this embodiment, the first gap eliminating device 9 is pressed in the counterbore 1a of the front end face of the first gun body 1 by the rubber containing device connecting ring 81, and comprises a pressure spring and a ball, one side of the ball is abutted to the rubber containing device connecting ring 81, the other side of the ball is abutted to one end of the pressure spring, and the other end of the pressure spring is abutted to the inside of the counterbore 1 a. According to the utility model, the connecting ring 81 of the glue accommodating device is abutted against the limiting end of the first connecting piece 10 by the counterforce of the pressure spring, so that the axial movement of the glue accommodating device 8 is eliminated.

According to the utility model, the limiting stop is arranged between the connecting piece and the gun body, so that after the connecting piece presses and fits the glue containing device and the gun body in place at one time, the glue containing device keeps a fixed axial gap without regulating the tightness again; meanwhile, in order to prevent the glue containing device from axially moving due to gaps, the glue containing device is also provided with a gap eliminating device, so that the glue containing device achieves the assembling effect of smooth rotation and self-damping.

Example two

Referring to fig. 7-11, the difference between this embodiment and the first embodiment is that: the second gun body 1 'and the second connecting member 10' of the present embodiment are different in structure from the first gun body 1 and the first connecting member 10 of the first embodiment.

Specifically, the second gun body 1' is not provided with the limit stop 1b, and the rest of the structure is the same as that of the first gun body 1. The limiting stop, namely the second connecting piece limiting stop 10g, is convexly arranged on the end surface of the second connecting piece 10 'facing the front end of the second gun body 1', and the height of the second connecting piece limiting stop 10g is larger than the thickness of the connecting ring 81 of the glue containing device. After the second connecting piece 10 'is screwed in place, the outer end face of the limiting stop 10g of the second connecting piece is abutted against the front end face of the second gun body 1', so that the connecting ring 81 of the glue containing device keeps a fixed axial gap.

The screw-fitting portion of the second connecting member 10 ', i.e., the second screw-fitting portion 10 e' of the present embodiment, is a hexagonal cylinder.

The rest of the structure and the functions can be described with reference to the first embodiment.

EXAMPLE III

Referring to fig. 12 to 16, the present embodiment is different from the second embodiment in that: the third connecting member 10 "of this embodiment is different in structure from the second connecting member 10' of the second embodiment.

The third connecting piece 10 ″ of this embodiment is not provided with a limiting stop, the limiting stop is an independently arranged limiting stop ring 12, the limiting stop ring 12 is installed between the limiting end face of the third connecting piece 10 ″ and the front end of the second gun body 1', and the thickness of the limiting stop ring 12 is greater than that of the rubber-containing device connecting ring 81. After the third connecting piece 10 ' is screwed in place, two end faces of the limiting retainer ring 12 are respectively abutted against the outer end face of the limiting end of the third connecting piece 10 ' and the front end face of the second gun body 1 ', so that the connecting ring 81 of the glue accommodating device keeps a fixed axial gap.

The screw-on portion of the third connecting member 10 ", i.e., the third screw-on portion 10 e", of this embodiment is a flat cylinder.

The rest of the structure and the functions can be described with reference to the second embodiment.

Example four

Referring to fig. 17 to 19, the present embodiment is different from the third embodiment in that: a mute washer is arranged between the third connecting piece 10 'and the rubber container connecting ring 81, and the limit check ring and the mute washer are integrated, namely, the integrated mute limit check ring 12', which can eliminate friction sound and ensure axial clearance and is convenient to install.

The rest of the structure and the functions can be referred to the third embodiment.

EXAMPLE five

Referring to fig. 20 to 22, the present embodiment is different from the first embodiment in that: in this embodiment, a silent washer 13 is disposed between the first connecting member 10 and the rubber container connecting ring 81 to eliminate the friction sound between the rubber container 8 and the first connecting member 10 when rotating.

The rest of the structure and the functions can be described with reference to the first embodiment.

EXAMPLE six

Referring to fig. 23 to 26, the present embodiment is different from the fifth embodiment in that: the end face of the connecting ring 81 of the glue containing device is provided with an inward concave positioning rail 81a corresponding to the ball body. The arrangement of the concave positioning rail 81a is convenient for the position of the glue accommodating device 8 after rotation to be kept stable.

The rest of the structure and the functions can be described with reference to the second embodiment.

EXAMPLE seven

Referring to fig. 27, the present embodiment is different from the first embodiment in that: in this embodiment, the external thread portion 10c of the first connecting member 10 is provided with a mold closing gap avoiding portion 10f, so that the mold closing gap is removed from the connecting member for mold opening processing, and production and assembly efficiency is improved.

The rest of the structure and the functions can be described with reference to the first embodiment.

Example eight

Referring to fig. 28, the present embodiment is different from the second embodiment in that: the second anti-backlash device 9' of the present embodiment is different in structure from the first anti-backlash device 9.

In this embodiment, the second gap eliminating device 9 ' is a magnetic body and is embedded in a counter bore of the limiting end face of the second connecting piece 10 ', and the connecting ring 81 of the glue containing device is attracted by magnetic force to abut against the limiting end face of the second connecting piece 10 ', so that the axial movement of the glue containing device 8 is eliminated.

The rest of the structure and the functions can be described with reference to the second embodiment.

Claims (10)

1. A glue gun with a glue containing device for determining a gap and eliminating a device comprises a gun body, a push rod, a push sheet, a push disc, a reset spring, a trigger, a glue containing device and a backstop device, wherein the glue containing device is arranged at the front part of the gun body; the reset spring is sleeved on the pushing rod and arranged between the pushing sheet and the front end of the gun body; the backstop device is arranged at the rear end of the gun body and is sleeved on the pushing rod to stop the pushing rod; the stopping device includes stopping spring and stopping piece, the stopping piece is worn to establish on the pushing ram, and its upper end can support with the rear end of the rifle body, stopping spring suit lies in on the pushing ram between stopping piece and the rifle body rear end, hold the mucilage binding including holding the mucilage binding and circle, hold the mucilage binding and circle and pass through the connecting piece and be connected of the rifle body with its pressure equipment at the front end of the rifle body, its characterized in that: a limiting gear which can lead the glue containing device to keep a fixed axial clearance is arranged between the limiting end face of the connecting piece and the front end face of the gun body, and a clearance eliminating device which can prevent the glue containing device from moving axially is arranged between the gun body or the connecting piece and the connecting ring of the glue containing device.

2. The caulking gun with the glue containing device gap fixing and eliminating device according to claim 1, wherein: the limiting stopper is arranged at the front end of the gun body in a protruding mode, and the height of the limiting stopper is larger than the thickness of the connecting ring of the glue containing device.

3. The caulking gun with the glue containing device gap fixing and eliminating device according to claim 1, wherein: the limiting stopper is arranged on the end face, facing the front end of the gun body, of the connecting piece in a protruding mode, and the height of the limiting stopper is larger than the thickness of the connecting ring of the glue containing device.

4. The caulking gun with the glue containing device gap fixing and eliminating device according to claim 1, wherein: the limiting retainer is a limiting retainer ring, the limiting retainer ring is arranged between the limiting end face of the connecting piece and the front end of the gun body, and the thickness of the limiting retainer ring is larger than that of the connecting ring of the glue containing device.

5. The caulking gun with the gap-fixing and eliminating device of the glue containing device according to any one of claims 1 to 4, wherein: and a mute gasket is arranged between the connecting piece and the connecting ring of the glue containing device.

6. The caulking gun with the glue containing device gap fixing and eliminating device according to claim 4, wherein: the limiting check ring and the mute gasket are of an integrated structure.

7. The caulking gun with the gap-fixing and eliminating device of the glue containing device according to any one of claims 1 to 4, wherein: be threaded connection between connecting piece and the rifle body, establish reset spring holding hole in the connecting piece, reset spring's one end butt is in the inner of reset spring holding hole, its other end and propulsion piece butt, the middle part of connecting piece is equipped with the central through-hole that the propulsion pole wore to establish, the connecting piece is equipped with and is used for outside application of force to realize rotatory dress portion soon, dress portion soon is combination formula counter bore, combination formula heavy groove, hexagonal column or oblate column.

8. The caulking gun with the gap-fixing and eliminating device of the glue containing device according to any one of claims 1 to 4, wherein: the external thread portion of the connecting piece is provided with a die assembly gap space avoiding portion.

9. The caulking gun with the gap-fixing and eliminating device of the glue containing device according to any one of claims 1 to 4, wherein: the gap eliminating device is pressed in a counter bore of the front end face of the gun body by the rubber containing device connecting ring and comprises a pressure spring and a ball body, and the end face of the rubber containing device connecting ring is provided with an inwards concave positioning stop which is arranged corresponding to the ball body.

10. The caulking gun with the gap-fixing and eliminating device of the glue containing device according to any one of claims 1 to 4, wherein: the gap eliminating device is a magnetic body and is embedded in a counter bore at the limiting end of the connecting piece, and the connecting ring of the glue containing device is abutted against the limiting end of the connecting piece through magnetic attraction.

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