CN101428266B

CN101428266B - Driving mechanism of glue gun

Info

Publication number: CN101428266B
Application number: CN2007101353301A
Authority: CN
Inventors: 哈利·索默
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2007-11-05
Filing date: 2007-11-05
Publication date: 2012-04-25
Anticipated expiration: 2027-11-05
Also published as: CN101428266A

Abstract

The invention relates to a driving mechanism for a glue gun, which comprises a crank conducting pendular movement. The crank can drive a first connecting rod and a second connecting rod which are arranged on the crank to conduct reciprocating movement; the first connecting rod and the second connecting rod respectively drives a first driving rod and a second driving rod to conduct pendular movement; and the first driving rod and the second driving rod are in sliding fit with a piston rod, and can alternately drive the piston rod to move axially. Compared with the prior art, the invention has the beneficial effect of providing a novel glue gun driving mechanism with the advantages of simple structure, good performance, and greater popularization significance.

Description

Driving mechanism of glue gun

Technical Field

The invention relates to a driving mechanism of a glue gun.

Background

In the current life, the glue gun is a very common decoration tool and mainly plays a role in sealing floors or glass. The glue gun sold in the market at present mainly has three driving modes of manual operation, electric operation and pneumatic operation to realize gluing. For example, the most common manual driving mechanism utilizes two pawl mechanisms, which are simple but require a great force from the glue gun to squeeze the glue out of the glue cartridge. The pneumatic glue gun is more sold in the other market, and due to the fact that air pressure is adopted as driving force, great inconvenience is brought to an operator when the air pressure is insufficient, a series of components such as valves need to be introduced into a driving mechanism, assembly is complex, and safety performance needs to be checked. Therefore, the development trend of the glue gun at present is to adopt an electric driving mechanism to realize gluing. At present, the most used structure is that a motor drives a gear rack to drive, for example, as described in U.S. Pat. No. 5,5775533, but it is troublesome to manufacture the whole piston rod into a rack, and because a certain distance exists between each tooth of the rack, the glue gun can push out the distance of the remaining tooth after the motor stops, so that the glue can overflow from a glue cylinder by a small amount, and unnecessary waste is caused.

In view of this, further research into the driving mechanism of the glue gun is necessary.

Disclosure of Invention

The invention aims to provide a novel driving mechanism of a glue gun with a simple structure.

The technical scheme adopted by the invention for solving the problems in the prior art is as follows:

a driving mechanism of a glue gun comprises a piston rod capable of moving along the X direction of the axis of the piston rod and a crank capable of doing pendulum motion, wherein the crank can drive a first connecting rod and a second connecting rod arranged on the crank to do reciprocating motion along the direction approximately parallel to the X direction of the axis, the first connecting rod and the second connecting rod respectively drive a first driving rod and a second driving rod to do pendulum motion, and the first driving rod and the second driving rod are connected to the piston rod in a sliding fit mode and alternately drive the piston rod to do axial motion.

One end of the first connecting rod and one end of the second connecting rod are respectively pivoted on the crank, and the other ends of the first connecting rod and the second connecting rod are respectively pivoted on the first driving rod and the second driving rod. The motion center of the crank is positioned on a connecting line between the first connecting rod and the pivot point of the crank, and the connecting line between the second connecting rod and the pivot point of the crank.

The crank is provided with one end of a third connecting rod through a pivot, the driving mechanism further comprises a rotating disc rotating around the center of the driving mechanism, and the other end of the third connecting rod is arranged on the surface of the rotating disc through the pivot and is deviated from the rotating center of the rotating disc.

The crank is triangular, and one end of each of the first connecting rod, the second connecting rod and the third connecting rod is respectively pivoted on three corners of the crank.

The distance between the pivot point of the third connecting rod and the crank and the motion center of the crank is larger than the distance between the pivot point of the first connecting rod or the second connecting rod and the crank and the motion center of the crank.

And a spring is arranged between the first and second driving rods and the side wall of the shell of the glue gun, and the first and second driving rods and the piston rod are self-locked under the action of the spring in an initial state.

Compared with the prior art, the invention has the beneficial effects that: the utility model provides a novel actuating mechanism of gluing the rifle, and each part simple structure, workable, whole mechanism easy operation, excellent performance.

Drawings

Fig. 1 is a schematic view of the present invention in an initial state.

Fig. 2 is a schematic diagram of the present invention in a first driving state.

Fig. 3 is a schematic diagram of the present invention in an intermediate state.

Fig. 4 is a schematic diagram of the present invention in a second driving state.

Wherein,

1 turntable 10 turntable rotation center 2 third connecting rod

21 one end 22 and the other end 3 crank

30 crank movement center 4a, first connecting rod 4b and second connecting rod

41a, 41b, one end 42a, 42b and the other end 5a first drive lever

5b second drive rod 6a, 6b spring 7a, 7b housing side wall

8 piston rod 9 piston disc X piston rod axis

Detailed Description

As shown in fig. 1, the present invention discloses a novel glue gun driving mechanism. The inner part of the shell of the glue gun is provided with a rotary disc 1 which can rotate around the center 10 of the rotary disc, and the rotary disc 1 can be driven by a motor of the glue gun or can be driven to rotate manually. A third link 2 is pivotally arranged on the surface of the turntable 1, offset from the turntable rotation centre 10. All pivot structures in the present invention are connected by pin holes, so they will not be described further.

A crank 3, which is triangular in shape, is arranged above the turntable 1 in the figure. The crank 3 is rotatable about its centre 30 and has three links pivoted at its three corners. One end 21 of the third link 2 is pivoted at one of the corners and the other end 22 is pivoted at the surface of the turntable 1, as mentioned above. One ends 41a, 41b of the first and second links 4a, 4b are pivotally provided at the other two corners of the crank 3, and the other ends 42a, 42b thereof are pivotally provided on the first and second drive levers 5a, 5b, respectively. The centre of motion 30 of the crank 3 is located on the line of the pivot point between the first and second links 4a, 4b and the crank 3. The distance between the pivot point of the third link 2 and the crank 3 to the crank movement center 30 is greater than the distance between the pivot point of the first link 4a or the second link 4b and the crank 3 to the crank movement center 30.

The first and second driving rods 5a, 5b are slidably coupled to a piston rod 8 of the glue gun, and the structure thereof is the prior art, that is, the first and second driving rods 5a, 5b are provided with a through hole slightly larger than the diameter of the piston rod 8, and the piston rod 8 passes through the through hole. As in the prior art, the piston rod 8 has an axis X, and a piston disc 9 is fixed at the front end of the piston rod and used for pushing the tail end of the glue stick to extrude glue. The piston rod 8, in addition to passing through the through holes of the first and second drive rods 5a, 5b, also passes through the holes of the side walls 7a, 7b of the housing during assembly. In this embodiment, the casing side walls 7a and 7b are rib plates inside the glue gun casing. The first and second driving rods 5a and 5b and the side walls 7a and 7b of the housing of the glue gun are respectively provided with a spring 6a and 6b, the first and second driving rods 5a and 5b and the piston rod 8 are clamped under the action of the springs 6a and 6b in an initial state, namely the first and second driving rods 5a and 5b are slightly inclined, and the piston rod 8 passes through the through holes of the first and second driving rods 5a and 5b, so that the first and second driving rods 5a and 5b and the piston rod 8 just reach an angle capable of self-locking.

The following describes the movement of the present embodiment.

As shown in fig. 1, when the turntable 1 rotates clockwise, the crank 3 can rotate counterclockwise around the center 30 thereof under the driving of the third link 2, and the crank can make one end 41a, 41b of the first and second links 4a, 4b also rotate counterclockwise around the crank movement center 30. Referring to fig. 2, the other end 42a of the first link 4a has a corresponding forward axial displacement along the axis X, and due to the self-locking between the first driving rod 5a and the piston rod 8, the other end 42a of the first link 4a can drive the first driving rod 5a and the piston rod 8 to advance along the axis X together against the acting force of the spring 6a, so as to achieve the glue squeezing. At this time, the other end 42b of the second connecting rod 4b has a corresponding backward axial displacement along the axis X, so that the second driving rod 5b swings clockwise to release the self-locking between the second driving rod 5b and the piston rod 8, and the glue squeezing is easier and smoother.

As the turntable 1 continues to rotate clockwise, the crank 3 will reverse direction and rotate clockwise about its centre 30, according to the mechanical principle of a crank link, as shown in fig. 3. One ends 41a, 41b of the first and second links 4a, 4b also rotate clockwise about the crank center of motion 30. Thus, the other end 42a of the first link 4a is axially displaced rearwardly along the axis X, and the other end 42b of the second link 4b is axially displaced forwardly along the axis X, bringing the drive mechanism to the intermediate condition of fig. 3.

When the turntable 1 continues to rotate clockwise, the crank 3 also continues to rotate clockwise, as shown in fig. 4, the other end 42b of the second connecting rod 4b has a corresponding forward axial displacement along the axis X, and due to the self-locking between the second driving rod 5b and the piston rod 8, the other end 42b of the second connecting rod 4b can drive the second driving rod 5b and the piston rod 8 to advance along the axis X together against the acting force of the spring 6b, so that the glue squeezing is realized. At this time, the other end 42a of the first link 4a has a corresponding backward axial displacement along the axis X, so that the first driving rod 5a swings clockwise to release the self-locking between the first driving rod 5a and the piston rod 8, and the glue squeezing is easier and smoother.

Therefore, when the turntable 1 rotates clockwise all the time, the crank 3 will make pendulum motion ceaselessly, and the first and second driving rods 5a and 5b will also make pendulum motion ceaselessly to realize self-locking and unlocking with the piston rod 8, so as to alternately drive the piston 8 rod to make axial motion, and realize uninterrupted glue extrusion. When the extrusion of the glue needs to be stopped, the rotation of the turntable 1 only needs to be stopped.

There are various embodiments of the present invention, and for example, the shape of the crank 3 may be polygonal or irregular. All technical solutions formed by using equivalent substitutions or equivalent transformations fall within the scope of the claimed invention.

Claims

1. A drive mechanism of a glue gun, comprising a piston rod (8) movable in an axial direction thereof, characterized in that: the reciprocating mechanism further comprises a crank (3) which performs pendulum motion, the crank (3) can drive a first connecting rod (4a) and a second connecting rod (4b) which are arranged on the crank to reciprocate along the direction approximately parallel to the axis, the first connecting rod (4a) and the second connecting rod (4b) respectively drive a first driving rod (5 a) and a second driving rod (5 b) to perform pendulum motion, and the first driving rod (5 a) and the second driving rod (5 b) are in sliding fit with the piston rod (8) and alternately drive the piston rod (8) to perform axial motion.

2. The drive mechanism of a glue gun as recited in claim 1, further comprising: one ends (41a, 41b) of the first and second connecting rods (4a, 4b) are respectively pivoted on the crank (3), and the other ends (42a, 42b) are respectively pivoted on the first and second driving rods (5a, 5 b).

3. The drive mechanism of a glue gun as recited in claim 2, further comprising: the motion center (30) of the crank (3) is positioned on a connecting line between the first connecting rod (4a) and the pivot point of the second connecting rod (4b) and the pivot point of the crank (3).

4. The drive mechanism of a glue gun as recited in claim 3, further comprising: one end (21) of a third connecting rod (2) is arranged on the crank (3) in a pivot mode, the driving mechanism further comprises a rotating disc (1) rotating around the center (10) of the driving mechanism, and the other end (22) of the third connecting rod (2) is arranged on the surface of the rotating disc (1) in a pivot mode and is deviated from the rotating center (10) of the rotating disc.

5. The drive mechanism of a glue gun as recited in claim 4, further comprising: the distance between the pivot point of the third connecting rod (2) and the crank (3) and the crank movement center (30) is larger than the distance between the pivot point of the first connecting rod (4a) or the second connecting rod (4b) and the crank (3) and the crank movement center (30).

6. The drive mechanism of a glue gun as recited in claim 5, further comprising: the crank (3) is triangular, and one ends (41a, 41b, 21) of the first connecting rod, the second connecting rod and the third connecting rod (4a, 4b, 2) are respectively pivoted on three corners of the crank (3).

7. The drive mechanism of a glue gun as recited in claim 1, further comprising: springs (6a, 6b) are arranged between the first driving rod (5 a), the second driving rod (5 b) and the side wall (7a, 7b) of the shell of the glue gun, and the first driving rod (5 a), the second driving rod (5 b) and the piston rod (8) are self-locked under the action of the springs (6a, 6b) in the initial state.