Foaming gun with flow adjusting mechanism

Abstract

The utility model discloses a foaming gun with a flow regulating mechanism, which solves the problems that the flow regulating mechanism on the existing foaming gun is complicated in structure and inconvenient to manufacture and install, and adopts the technical scheme that the foaming gun with the flow regulating mechanism comprises a gun body, a gun barrel is connected onto the gun body, and a gun nozzle is arranged at the outer end of the gun barrel. The gun body is provided with a gun nozzle and a gun barrel, a needle rod is coaxially arranged in the gun barrel, a spring acts on the needle rod to promote the needle rod to keep a trend of moving towards the direction of the gun nozzle, a trigger is movably arranged on the gun body, and the trigger is used for acting with the needle rod to realize axial movement of the needle rod. An adjusting wheel capable of achieving axial position adjustment is arranged on the fixing piece, and the adjusting wheel limits the pulling amplitude of the trigger by limiting the trigger.

Description

TECHNICAL FIELD

[0001] The utility model relates to a foaming gun, in particular to a foaming gun with flow regulating mechanism. BACKGROUND

[0002] Foaming agent is often used in building decoration, which is mainly used for coating the gap between the board or other structures. The foaming agent accumulated in the gap will expand and solidify to seal the gap. The foaming agent is usually coated by a foaming gun. The structure of the foaming gun mainly includes a gun body and a barrel. A needle rod is arranged in the barrel. The gun body has a liquid passage. An adapter is used to connect the foaming tank. The adapter has a connecting cylinder. A through channel is arranged at the axis of the connecting cylinder. The foaming agent in the foaming tank will flow into the liquid passage of the gun body through the channel. A trigger is arranged on the gun body. The trigger is connected with the needle rod. When the trigger is pulled, the needle rod will move with the trigger. After the needle rod is driven by the trigger to move towards the rear side of the gun body, a gap will be formed between the end of the needle rod and the nozzle arranged at the outer end of the barrel. The foaming agent will flow out of the gap to the outside of the barrel. The size of the gap is related to the flow of the foaming agent.

[0003] A flow regulating device of a foaming gun is disclosed in Chinese patent document (publication number: CN 103706502B), which includes a shell arranged on the gun body and a knob. An adjusting rod is positioned circumferentially in the shell. One end of the adjusting rod can contact the tail of the needle rod. The other end of the adjusting rod is connected with the knob through a thread. A cap is arranged between the shell and the knob to axially limit the knob and the shell. A damping structure is arranged in the cap corresponding to the knob. The cap of the flow regulating device of the foaming gun axially limits the knob and the shell. The length of the knob extending out of the gun body remains unchanged during the rotation of the knob, so that the knob is always in the most ideal position designed. The knob is easier to rotate. The resistance during the rotation of the knob is more uniform, and the user's hand feeling is more comfortable when operating. The installation of the flow regulating device is convenient, which is suitable for various types of foaming guns and has good universality.

[0004] The flow regulating device is connected with the adjusting rod through the thread of the knob, and the knob is axially limited and circumferentially rotated. The adjusting rod is circumferentially limited and axially slid, so as to adjust the axial position of the adjusting rod. The structure of the regulating device is relatively complex, and the manufacturing and assembly are not convenient. UTILITY MODEL CONTENTS

[0005] The utility model needs to solve the technical problem: to provide a foaming gun with a flow regulating device, the regulating device on the foaming gun is simple in structure and convenient to assemble.

[0006] The technical solutions adopted to solve the technical problems are as follows: a foaming gun with a flow regulating mechanism, comprising a gun body, a gun barrel connected to the gun body, a gun nozzle arranged at the outer end of the gun barrel, a needle rod coaxially arranged in the gun barrel, a spring acting on the needle rod to make the needle rod keep a tendency of moving towards the gun nozzle, and a trigger movably arranged on the gun body and used for acting on the needle rod to realize axial movement of the needle rod, characterized in that the flow regulating mechanism comprises a fixing member fixed on the gun body, and an adjusting wheel arranged on the fixing member and capable of realizing axial position adjustment, the adjusting wheel limiting the trigger to limit the trigger pulling range.

[0007] In the foaming gun, the adjusting wheel and the fixing member can be threadedly connected or be in a multi-gear clamping structure, the interval between the adjusting wheel and the trigger is changed by changing the axial position of the adjusting wheel on the fixing member, so that the trigger pulling range is limited, and the purpose of regulating the flow of the foaming gun is achieved.

[0008] Further, the fixing member is arranged in the axial direction of the needle rod, which facilitates the support of the needle rod, improves the stability of the axial force of the needle rod, and effectively improves the compactness of the overall structure.

[0009] Further, a coupling hole is arranged on the gun body, the fixing member is arranged in the coupling hole, the extending end of the fixing member extends to the outside of the gun body in the direction of the gun barrel, and the adjusting wheel is arranged on the extending end of the fixing member. By arranging the coupling hole, the connection and fixation of the fixing member on the gun body are facilitated. The adjusting wheel is arranged on the extending end of the fixing member, and the trigger is limited.

[0010] Further, the fixing member is provided with external threads, the fixing member is threadedly connected with the gun body, and the adjusting wheel is threadedly connected with the fixing member. This makes it convenient to accurately adjust the axial position of the adjusting wheel on the fixing member, and the flow regulation of the foaming gun is accurate.

[0011] Further, the coupling hole penetrates the gun body in the axial direction of the needle rod, the inner end of the fixing member is located in the gun body, a wrench cooperation hole is arranged on the inner end face of the fixing member, and the external threads extend from the inner end side of the fixing member to the extending end. The wrench cooperation hole is generally an inner hexagonal cooperation hole, the fixing member can be assembled into the coupling hole from the rear side of the gun body, and the overall structure is simple to process and convenient to assemble.

[0012] Further, the adjusting wheel is in the shape of "convex", and the small head end of the adjusting wheel faces the trigger. This makes the cooperation size between the adjusting wheel and the fixing member large, which is beneficial to the stability of the adjusting wheel on the fixing member.

[0013] Further, the fixing member is hollow, the needle rod is inserted into the fixing member, and the spring acts on the needle rod in the fixing member.

[0014] Further, the transmission rod is sleeved on the needle rod in a clearance fit mode, the front end of the transmission rod is provided with a lug, the front end of the lug abuts against the trigger, the rear end of the lug is used for abutting against the adjusting wheel, the rear end of the transmission rod is inserted into the adjusting wheel in a clearance fit mode, the transmission rod is provided with a protruding convex body, and the rear end of the transmission rod abuts against the convex body. By arranging the transmission rod and inserting the transmission rod into the adjusting wheel, the axial movement stability of the transmission rod is good,

[0015] Further, one end of the spring abuts against the fixing member, and the other end of the spring abuts against the convex body. The convex body can be formed by stamping the needle rod, the axial support of the spring and the transmission rod is realized through the convex body, the structure is simple, the force between the related components is in a straight line, and the force stability is good.

[0016] The adjusting device has the following beneficial effects: in the adjusting device, the interval adjustment between the adjusting wheel and the trigger is realized through the adjustment of the axial position of the adjusting wheel on the fixing member, and then the flow of the foaming gun is adjusted, the structure is simple, and the adjustment is convenient. A relative axial and circumferential single defined transmission pair does not need to be arranged to realize the adjustment of the axial limiting position, the machining and installation are convenient, the manufacturing cost of the foaming gun can be effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a perspective view of the foaming gun.

[0018] Figure 2 is an explosion view of the foaming gun.

[0019] Figure 3 is a sectional view of the fixing member and the gun body connected together.

[0020] In the drawing, 1 is a gun nozzle, 2 is a gun barrel, 3 is a gun body, 31 is a connecting hole, 4 is an adjusting wheel, 5 is a handle, 6 is a transmission rod, 61 is a lug, 7 is a trigger, 8 is a needle rod, 81 is a convex body, 9 is a spring, 10 is a plug, and 11 is a fixing member. DETAILED DESCRIPTION

[0021] The foaming gun with the flow regulating mechanism comprises a gun body 3, which is shaped to be suitable for being mounted on the gun body 3. A handle 5 is connected to the gun body 3 for the user to hold. A hollow gun barrel 2 is connected to the gun body 3. An outer end of the gun barrel 2 is provided with a nozzle 1. A needle rod 8 is coaxially arranged in the gun barrel 2. A spring 9 acts on the needle rod 8 to keep the needle rod 8 moving towards the nozzle 1. A trigger 7 is movably arranged on the gun body 3. An upper end of the trigger 7 is hinged to the gun body 3. The trigger 7 is movably connected with the needle rod 8. The needle rod 8 passes through the trigger 7 in a clearance. The trigger 7 is used to act on the needle rod 8 to realize the axial movement of the needle rod 8, so as to realize the change of the opening between the front end of the needle rod 8 and the liquid outlet hole of the nozzle 1, and realize the liquid outlet of the foaming agent.

[0022] The flow regulating mechanism comprises a fixing member 11 fixed on the gun body 3. The fixing member 11 can also be fixed on the handle 5. The fixing member 11 is fixed on the gun body 3 through the handle 5. An adjusting wheel 4 is arranged on the fixing member 11 to realize the adjustment of the axial position, so that the interval between the adjusting wheel 4 and the trigger 7 changes, and then the adjusting wheel 4 limits the trigger 7 to limit the trigger pulling range of the trigger 7, and finally realizes the limitation of the flow of the foaming gun.

[0023] As shown in the figure, the fixing member 11 is directly fixed on the gun body 3, and the fixing member 11 is arranged in the axial direction of the needle rod 8. A connecting hole 31 is arranged on the gun body 3. The fixing member 11 is arranged in the connecting hole 31. The extending end of the fixing member 11 extends to the outside of the gun body 3 in the direction of the gun barrel 2. The adjusting wheel 4 is arranged on the extending end of the fixing member 11. The fixing member 11 is provided with external threads. The fixing member 11 is screwed with the gun body 3. The adjusting wheel 4 is screwed with the fixing member 11. In order to improve the stability of the cooperation between the adjusting wheel 4 and the fixing member 11, the adjusting wheel 4 is in the shape of "convex". The adjusting wheel 4 has a large axial dimension. The small end of the adjusting wheel 4 is directed to the trigger 7. The connecting hole 31 penetrates the gun body 3 in the axial direction of the needle rod 8. After the fixing member 11 is fixed in place, the inner end of the fixing member 11 is located in the gun body 3. In order to realize the connection between the fixing member 11 and the gun body 3, a wrench cooperation hole is arranged on the inner end surface of the fixing member 11. The wrench cooperation hole is generally an internal hexagonal hole. The cooperation between the hexagonal wrench and the internal hexagonal hole realizes the connection of the fixing member 11 on the gun body 3. The front end side of the connecting hole 31 is provided with internal threads. The external threads of the fixing member 11 extend from the inner end side of the fixing member 11 to the extending end. During installation, the fixing member 11 is inserted into the connecting hole 31 from the rear end side of the connecting hole 31. The hexagonal wrench is used to install the fixing member 11 on the gun body 3. In order to improve the integrity of the gun body 3, after the fixing member 11 is installed in place, a plug 10 needs to be inserted into the rear end of the connecting hole 31. The rear end surface of the plug 10 is flush with the rear end surface of the gun body 3.

[0024] The fixing member 11 is a hollow rod-shaped body, and a blind hole is formed in the fixing member 11, the front end of the blind hole is an opening, and the rear end of the needle rod 8 can be inserted into the fixing member 11 from the opening. The spring 9 is also arranged in the fixing member 11, the front end of the spring 9 acts on the needle rod 8, and the rear end of the spring 9 abuts against the rear end of the blind hole of the fixing member 11.

[0025] The rod-shaped transmission rod 6 is sleeved on the needle rod 8 in a clearance fit, the front end of the transmission rod 6 is provided with a lug 61 which protrudes to the radial outside of the needle rod 8, the rear end of the transmission rod 6 is inserted into the adjusting wheel 4 in a clearance fit, and the lug 61 generally cannot be inserted into the fixing member 11. A fork is formed at the front end of the lug 61, and the fork is abutted against the front end of the trigger 7, under the driving of the trigger 7, the rear end of the lug 61 can be used to abut against the front end of the adjusting wheel 4, so as to limit the trigger 7. A protruding lug 81 is arranged on the transmission rod 6, the lug 81 is formed on the needle rod 8 by stamping, and under the action of the elastic force of the spring 9, the rear end of the transmission rod 6 abuts against the lug 81. The lug 81 is generally two, and the lugs 81 are symmetrically formed on the opposite sides of the needle rod 8, one end of the spring 9 abuts against the rear end of the blind hole of the fixing member 11, and the other end abuts against the lug 81.

[0026] When assembling the adjusting mechanism, the transmission rod 6 and the adjusting wheel 4 are first sleeved on the needle rod 8, the needle rod 8 is inserted into the trigger 7 from the connecting hole 31 and extends into the barrel 2, the spring 9 is arranged in the blind hole of the fixing member 11, the fixing member 11 is assembled to the gun body 3 from the rear side of the gun body 3, the spring 9 is sleeved on the rear end of the needle rod 8, the rear end of the transmission rod 6 is inserted into the blind hole of the fixing member 11, the plug cap 10 is inserted into the rear end of the connecting hole 31, and the adjusting wheel 4 is threadedly connected to the external threads of the fixing member 11.

Claims

1. A foaming gun with a flow regulating mechanism, comprising a gun body, a gun barrel connected to the gun body, a nozzle at the outer end of the gun barrel, a needle bar coaxially disposed inside the gun barrel, a spring acting on the needle bar to cause the needle bar to maintain a tendency to move towards the nozzle, and a trigger movably disposed on the gun body, the trigger being used to interact with the needle bar to realize the axial movement of the needle bar, characterized in that, The flow regulating mechanism comprises a fixing member fixed on the gun body, the fixing member being provided with an adjusting wheel capable of realizing axial position adjustment, the adjusting wheel limiting the pulling range of the trigger by limiting the trigger.

2. The foaming gun having a flow regulating mechanism according to claim 1, wherein, The fixing member is arranged in the axial direction of the needle rod.

3. The foaming gun having a flow regulating mechanism according to claim 2, wherein, The gun body is provided with a coupling hole, the fixing member is arranged in the coupling hole, the extending end of the fixing member extends to the outside of the gun body in the direction of the gun barrel, and the adjusting wheel is arranged on the extending end of the fixing member.

4. The foaming gun having a flow regulating mechanism according to claim 3, wherein, The fixing member is provided with external threads, the fixing member is threadedly connected with the gun body, and the adjusting wheel is threadedly connected with the fixing member.

5. The foaming gun having a flow regulating mechanism according to claim 4, wherein, The coupling hole penetrates the gun body in the axial direction of the needle rod, the inner end of the fixing member is located in the gun body, a spanner cooperation hole is arranged on the inner end surface of the fixing member, the external threads extend from the inner end side of the fixing member to the extending end.

6. The foaming gun having a flow regulating mechanism according to claim 5, wherein, The adjusting wheel is in the shape of "n", and the small head end of the adjusting wheel faces the trigger.

7. The foam gun having a flow regulating mechanism according to any one of claims 2 to 6, wherein, The fixing member is hollow, the needle rod is inserted into the fixing member, and the spring acts on the needle rod in the fixing member.

8. The foaming gun having a flow regulating mechanism according to claim 7, wherein, The transmission rod is gapingly sleeved on the needle rod, the front end of the transmission rod is provided with a convex head, the front end of the convex head abuts against the trigger, the rear end of the convex head is used for abutting against the adjusting wheel, the rear end of the transmission rod is gapingly inserted into the adjusting wheel, a protruding convex body is arranged on the transmission rod, and the rear end of the transmission rod abuts against the convex body.

9. The foaming gun having a flow regulating mechanism according to claim 8, wherein, One end of the spring abuts against the fixing member, and the other end of the spring abuts against the convex body.

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