A glue gun

Abstract

The utility model relates to gluing equipment technical field discloses a glue gun, including drive assembly and glue outlet component, glue outlet component includes valve body, valve rod, flood plug and glue nozzle. Valve body has glue outlet runner extending along the first direction in, glue nozzle is connected on valve body, glue nozzle inner chamber and glue outlet runner intercommunication. The recess that surrounds glue outlet runner is provided on the lateral wall of glue outlet runner, and flood plug is sleeved on the valve rod and is located in the recess, and the outer wall of flood plug and the groove bottom of recess abut. Valve rod has first position and second position, and valve rod includes the reduced diameter section and sealing section that set up in proper order along the first direction, drive assembly is used for drive valve rod and moves along the first direction between first position and second position, when valve rod is located first position, the outer wall of sealing section and the inner wall of flood plug abut, when valve rod is located second position, flood plug surrounds the outer periphery of reduced diameter section, and the diameter of reduced diameter section is less than the inner diameter of flood plug.

Description

Technical Field

[0001] This utility model relates to the field of adhesive coating equipment technology, and in particular to an adhesive coating device. Background Technology

[0002] Currently, adhesive application is commonly used in the automotive industry's vehicle assembly manufacturing process, applied in processes such as final assembly, welding, and painting. These processes typically use glue guns for application, and the adhesives used include sealants, structural adhesives, and bonding adhesives. During the application process, a glue pump, metering machine, or other pumping equipment delivers the adhesive to the glue gun, which then sprays the adhesive onto the workpiece. After one application is completed, the glue gun is closed, and the next work cycle begins. These glue guns are typically single-component glue guns with cylinder-driven opening and closing. Current glue guns use a lever-type metal-contact hard seal structure to close and seal the adhesive flow channel. This sealing structure places high demands on the materials, machining precision, and driving force of related components, resulting in high processing costs for related components and a susceptibility to leakage problems.

[0003] Therefore, there is an urgent need for a glue gun to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a glue gun that reduces the precision requirements for the processing of sealing-related components and improves sealing reliability.

[0005] To achieve this objective, the present invention adopts the following technical solution: A glue gun includes a drive assembly and a glue dispensing assembly; the glue dispensing assembly includes a valve body, a valve stem, a plug seal, and a glue nozzle; The valve body has a glue dispensing channel extending in a first direction, the glue nozzle is connected to the valve body, and the inner cavity of the glue nozzle communicates with the glue dispensing channel; The side wall of the dispensing channel is provided with a groove surrounding the dispensing channel, the plug is sleeved on the valve stem and located in the groove, and the outer wall of the plug abuts against the bottom of the groove. The valve stem has a first position and a second position. The valve stem includes a reduced-diameter section and a sealing section arranged sequentially along a first direction. The driving assembly is used to drive the valve stem to move between the first position and the second position along the first direction. When the valve stem is in the first position, the outer wall of the sealing section abuts against the inner wall of the plug seal. When the valve stem is in the second position, the plug seal surrounds the outer periphery of the reduced-diameter section, and the diameter of the reduced-diameter section is smaller than the inner diameter of the plug seal.

[0006] As an improvement to the above technical solution, the dispensing assembly further includes a support member, which is sleeved on the valve stem and located on the side of the plug seal near the nozzle. The valve body is provided with a stop portion protruding into the glue outlet channel. The inner diameter of the stop portion is smaller than the outer diameter of the support member. The support member is disposed between the stop portion and the plug seal. The outer diameter of the reduced diameter section is smaller than the inner diameter of the support member. When the valve stem is in the second position, the support member surrounds the outer periphery of the reduced diameter section.

[0007] As an improvement to the above technical solution, it also includes an adhesive inlet connector. The valve body also has an adhesive inlet channel that communicates with the adhesive outlet channel. The adhesive inlet connector is connected to one side of the valve body along the first direction and is used to supply adhesive to the adhesive inlet channel.

[0008] As an improvement to the above technical solution, the drive assembly includes a cylinder block, an air connector, a first piston, and a piston rod; The cylinder has an air chamber, and the first piston is disposed in the air chamber, dividing the air chamber into a first chamber and a second chamber; One end of the piston rod extends into the air chamber and is connected to the first piston, while the other end extends into the glue outlet channel and is connected to the valve rod. There are two air connectors, which are respectively connected to the first cavity and the second cavity.

[0009] As an improvement to the above technical solution, the drive assembly further includes a return spring and a second piston; The cylinder block also has a front chamber, and the front chamber and the air chamber are spaced apart along the first direction; The reset spring and the second piston are both disposed in the front cavity and are both sleeved on the piston rod. The piston rod can drive the second piston to move along the first direction. When the valve rod is in the first position and the second position, the reset spring is in a compressed state.

[0010] As an improvement to the above technical solution, the cylinder body includes a rear cylinder, a front cylinder, and a cylinder block connected in sequence. The cylinder seat is connected to the valve body, the rear cylinder and the front cylinder surround the air chamber, and the front cylinder and the cylinder seat surround the front cavity.

[0011] As an improvement to the above technical solution, the valve body includes a sealing seat, a main valve body, and a front cover connected in sequence; The sealing seat is disposed between the drive assembly and the main valve body. One end of the glue outlet channel is located inside the main valve body, and the other end passes through the front cover. The piston rod passes through the sealing seat and extends into the main valve body. The glue nozzle is connected to the front cover.

[0012] As an improvement to the above technical solution, a locking nut is also included. A fixing part is protruding on the outer wall of the nozzle. The fixing part is located at one end of the nozzle near the front cover. The locking nut is sleeved on the nozzle and threadedly connected to the front cover. The fixing part is clamped between the locking nut and the front cover.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention relates to a glue gun that uses a drive assembly to move a valve stem along a first direction, switching the glue dispensing channel between open and closed. When the valve stem is in the first position, the sealing section of the valve stem moves into the plug seal, with the outer wall of the plug seal abutting the bottom of the groove and the inner wall abutting the outer wall of the valve stem, thereby sealing the gap between the valve stem and the side wall of the glue dispensing channel, thus closing the glue dispensing channel. When the valve stem is in the second position, the sealing section moves out of the plug seal, and the narrowing section enters the plug seal. Since the diameter of the narrowing section is smaller than the inner diameter of the plug seal, the glue can pass through the gap between the outer wall of the narrowing section and the inner wall of the plug seal, meaning that the glue dispensing channel is now open. The side wall of the groove limits the movement of the plug seal, preventing it from moving along the first direction with the sealing section, ensuring that the plug seal can disengage from the sealing section of the valve stem when the glue dispensing channel needs to be opened.

[0014] The glue gun of this invention seals the glue flow channel when it is closed by using a plug seal sandwiched between the sealing section of the valve stem and the valve body. This reduces the precision requirements for the valve body and valve stem and other sealing-related components, which helps to reduce processing costs. In addition, the sealing reliability is relatively high and leakage problems are not likely to occur. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the glue gun provided in this embodiment of the utility model. Figure 1 ; Figure 2 This is a schematic diagram of the glue gun provided in this embodiment of the utility model. Figure 2 ; Figure 3 This is a cross-sectional view of the glue gun provided in this embodiment of the utility model; Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0016] In the picture: X, first direction; 1. Driver components; 11. Cylinder block; 111. Rear cylinder; 112. Front cylinder; 113. Cylinder seat; 12. Air connector; 13. First piston; 14. Piston rod; 15. Return spring; 16. Second piston; 2. Glue dispensing assembly; 21. Valve body; 211. Groove; 212. Stop; 213. Sealing seat; 214. Main valve body; 215. Front cover; 22. Valve stem; 221. Sealing section; 222. Reduced diameter section; 223. Connecting section; 23. Pan-sealed; 24. Nozzle; 241. Fixing part; 25. Support components; 26. Tighten the nut; 3. Glue inlet connector; 10. Outlet channel; 20. Inlet channel; 30. Air cavity; 301. First cavity; 302. Second cavity; 40. Anterior cavity. Detailed Implementation

[0017] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0018] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0021] like Figures 1-4 As shown, this embodiment provides a glue gun, including a drive assembly 1 and a glue dispensing assembly 2. The glue dispensing assembly 2 includes a valve body 21, a valve stem 22, a plug seal 23, and a glue nozzle 24. The valve body 21 has a glue dispensing channel 10 extending along a first direction X. The glue nozzle 24 is connected to the valve body 21, and the inner cavity of the glue nozzle 24 communicates with the glue dispensing channel 10. A groove 211 surrounding the glue dispensing channel 10 is provided on the inner wall of the glue dispensing channel 10. The plug seal 23 is sleeved on the valve stem 22 and located in the groove 211, and the outer wall of the plug seal 23 abuts against the bottom of the groove 211. The valve stem 22 has a first position and a second position. The valve stem 22 includes a reduced-diameter section 222 and a sealing section 221 arranged sequentially along a first direction X. The driving assembly 1 is used to drive the valve stem 22 to move between the first position and the second position along the first direction X. When the valve stem 22 is in the first position, the outer wall of the sealing section 221 abuts against the inner wall of the plug seal 23. When the valve stem 22 is in the second position, the plug seal 23 surrounds the outer periphery of the reduced-diameter section 222, and the diameter of the reduced-diameter section 222 is smaller than the inner diameter of the plug seal 23. The plug seal 23 used in this embodiment is an existing product, and its specific structure will not be described here.

[0022] The glue gun provided in this embodiment drives the valve stem 22 to move along the first direction X through the drive assembly 1, so that the glue dispensing channel 10 switches between open and closed. When the valve stem 22 is in the first position, the sealing section 221 of the valve stem 22 moves into the plug seal 23. The outer wall of the plug seal 23 abuts against the bottom of the groove 211, and the inner wall abuts against the outer wall of the valve stem 22, thereby sealing the gap between the valve stem 22 and the side wall of the glue dispensing channel 10, so that the glue dispensing channel 10 is in the closed state. When the valve stem 22 is in the second position, the sealing section 221 moves out of the plug seal 23, and the reduced diameter section 222 enters into the plug seal 23. Since the diameter of the reduced diameter section 222 is smaller than the inner diameter of the plug seal 23, the glue can pass through the gap between the outer wall of the reduced diameter section 222 and the inner wall of the plug seal 23. That is to say, at this time the glue dispensing channel 10 is in the open state. The sidewall of the groove 211 serves to limit the position of the plug seal 23, preventing the plug seal 23 from moving along the first direction X with the sealing section 221, and ensuring that the plug seal 23 can disengage from the sealing section 221 of the valve stem 22 when the dispensing channel 10 needs to be opened.

[0023] The glue gun provided in this embodiment seals the glue flow channel 10 when it is closed by using the plug seal 23 sandwiched between the sealing section 221 of the valve stem 22 and the valve body 21. This reduces the processing accuracy requirements of the sealing-related components, which helps to reduce processing costs and avoids leakage problems caused by insufficient processing accuracy of metal parts in pull rod type metal contact hard seals. The sealing reliability is relatively high.

[0024] Optionally, such as Figure 3 and Figure 4 As shown, the dispensing assembly 2 also includes a support member 25, which is sleeved on the valve stem 22 and located on the side of the plug seal 23 near the nozzle 24. A stop portion 212 protrudes from the valve body 21 into the dispensing channel 10. The inner diameter of the stop portion 212 is smaller than the outer diameter of the support member 25. The support member 25 is positioned between the stop portion 212 and the plug seal 23. One end of the support member 25 abuts against the plug seal 23 along the first direction X, and the other end abuts against the stop portion 212. The stop portion 212 serves to limit the movement of the support member 25. The outer diameter of the reduced diameter section 222 is smaller than the inner diameter of the support member 25. When the valve stem 22 is in the second position, the reduced diameter section 222 moves into the support member 25, and the support member 25 surrounds the outer periphery of the reduced diameter section 222. The adhesive can pass through the gap between the reduced diameter section 222 and the inner wall of the support member 25, preventing the support member 25 from obstructing the opening of the dispensing channel 10. The support member 25 supports the plug seal 23 along the first direction X, helping the plug seal 23 to withstand the pressure from the rubber material and preventing the plug seal 23 from coming out of the groove 211 under the pressure of the rubber material.

[0025] Optionally, such as Figures 1-3 As shown, the glue gun provided in this embodiment also includes a glue inlet connector 3, and the valve body 21 also has a glue inlet channel 20 communicating with the glue outlet channel 10. The glue inlet connector 3 is connected to one side of the valve body 21 along the first direction X, and is used to supply glue to the glue inlet channel 20. The glue inlet connector 3 is used to connect with a glue supply device.

[0026] Optionally, such as Figures 1-3As shown, the drive assembly 1 includes a cylinder body 11, an air connector 12, a first piston 13, and a piston rod 14. The cylinder body 11 has an air chamber 30, in which the first piston 13 is disposed and divides the air chamber 30 into a first chamber 301 and a second chamber 302. One end of the piston rod 14 extends into the air chamber 30 and connects to the first piston 13, while the other end extends into the glue dispensing channel 10 and connects to the valve rod 22. Two air connectors 12 are provided, each communicating with the first chamber 301 and the second chamber 302 respectively. Specifically, the first chamber 301 is located on the side of the second chamber 302 away from the valve body 21. When it is necessary to open the glue dispensing channel 10, air is injected into the first chamber 301 through the air connector 12 communicating with the first chamber 301. The first piston 13 drives the piston rod 14 to move towards the nozzle 24, the sealing section 221 of the valve rod 22 disengages from the plug seal 23, and the glue dispensing channel 10 opens. When it is necessary to close the glue outlet channel 10, air is introduced into the second chamber 302 through the air connector 12 connected to the second chamber 302. The gas in the first chamber 301 is discharged through the air connector 12 connected to the first chamber 301. The first piston 13 drives the piston rod 14 to move away from the nozzle 24. The sealing section 221 of the valve rod 22 enters the plug seal 23, and the glue outlet channel 10 is closed.

[0027] Furthermore, such as Figure 3 As shown, the drive assembly 1 also includes a return spring 15 and a second piston 16. The cylinder body 11 also has a front chamber 40, which is spaced apart from the air chamber 30 along the first direction X. The return spring 15 and the second piston 16 are both disposed in the front chamber 40 and are both sleeved on the piston rod 14. The piston rod 14 can drive the second piston 16 to move along the first direction X. When the valve rod 22 is in the first position and the second position, the return spring 15 is in a compressed state. The return spring 15 plays an auxiliary role in resetting the valve rod 22, which can improve the closing speed of the dispensing channel 10. In the event of a failure in the air supply equipment, the elastic force of the return spring 15 can independently drive the piston rod 14 to move away from the nozzle 24, so that the sealing section 221 of the valve rod 22 cooperates with the plug seal 23 to close the dispensing channel 10. Specifically, in this embodiment, the valve stem 22 further includes a connecting section 223. The piston rod 14 passes through the front cavity 40 and extends into the valve body 21, connecting to one end of the connecting section 223. The other end of the connecting section 223 is connected to one end of the reduced diameter section 222, and the other end of the reduced diameter section 222 is connected to one end of the sealing section 221. The piston rod 14 is threadedly connected to the connecting section 223, and the sealing section 221, the reduced diameter section 222, and the connecting section 223 are integrally formed.

[0028] Furthermore, such as Figures 1-3As shown, the cylinder body 11 includes a rear cylinder 111, a front cylinder 112, and a cylinder seat 113 connected in sequence. The cylinder seat 113 is connected to the valve body 21. The rear cylinder 111 and the front cylinder 112 form an air chamber 30, and the front cylinder 112 and the cylinder seat 113 form a front chamber 40. The return spring 15 is located between the second piston 16 and the cylinder seat 113.

[0029] Optionally, such as Figures 1-3 As shown, the valve body 21 includes a sealing seat 213, a main valve body 214, and a front cover 215 connected in sequence. The sealing seat 213 is disposed between the drive assembly 1 and the main valve body 214. One end of the glue outlet channel 10 is located inside the main valve body 214, and the other end passes through the front cover 215. The piston rod 14 passes through the sealing seat 213 and extends into the main valve body 214. The glue nozzle 24 is connected to the front cover 215. A sealing ring is sandwiched between the sealing seat 213 and the valve rod 22 to ensure a seal between the piston rod 14 and the valve body 21.

[0030] Furthermore, such as Figures 1-3 As shown, the dispensing assembly 2 also includes a locking nut 26. A fixing part 241 protrudes from the outer wall of the nozzle 24. The fixing part 241 is located at one end of the nozzle 24 near the front cover 215. The locking nut 26 is sleeved on the nozzle 24 and threadedly connected to the front cover 215. The fixing part 241 is clamped between the locking nut 26 and the front cover 215. The locking nut 26 serves to connect the nozzle 24 and the front cover 215 of the valve body 21.

[0031] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A glue gun, characterized in that, It includes a drive assembly (1) and a dispensing assembly (2); the dispensing assembly (2) includes a valve body (21), a valve stem (22), a plug seal (23), and a nozzle (24). The valve body (21) has a glue outlet channel (10) extending along the first direction (X), and the glue nozzle (24) is connected to the valve body (21). The inner cavity of the glue nozzle (24) is in communication with the glue outlet channel (10). The side wall of the dispensing channel (10) is provided with a groove (211) surrounding the dispensing channel (10). The plug seal (23) is sleeved on the valve stem (22) and located in the groove (211). The outer wall of the plug seal (23) abuts against the bottom of the groove (211). The valve stem (22) has a first position and a second position. The valve stem (22) includes a reduced diameter section (222) and a sealing section (221) arranged sequentially along a first direction (X). The drive assembly (1) is used to drive the valve stem (22) to move between the first position and the second position along the first direction (X). When the valve stem (22) is in the first position, the outer wall of the sealing section (221) abuts against the inner wall of the plug seal (23). When the valve stem (22) is in the second position, the plug seal (23) surrounds the outer periphery of the reduced diameter section (222). The diameter of the reduced diameter section (222) is smaller than the inner diameter of the plug seal (23).

2. The glue gun according to claim 1, characterized in that, The dispensing assembly (2) also includes a support member (25), which is sleeved on the valve stem (22) and located on the side of the plug seal (23) near the nozzle (24); The valve body (21) is provided with a stop (212) protruding into the glue outlet channel (10). The inner diameter of the stop (212) is smaller than the outer diameter of the support (25). The support (25) is disposed between the stop (212) and the plug seal (23). The outer diameter of the reduced diameter section (222) is smaller than the inner diameter of the support (25). When the valve stem (22) is in the second position, the support (25) surrounds the outer periphery of the reduced diameter section (222).

3. The glue gun according to claim 1, characterized in that, It also includes a glue inlet connector (3), and the valve body (21) also has a glue inlet channel (20) communicating with the glue outlet channel (10). The glue inlet connector (3) is connected to one side of the valve body (21) along the first direction (X) for supplying glue to the glue inlet channel (20).

4. The glue gun according to any one of claims 1-3, characterized in that, The drive assembly (1) includes a cylinder (11), an air connector (12), a first piston (13), and a piston rod (14). The cylinder (11) has an air chamber (30), and the first piston (13) is disposed in the air chamber (30) and divides the air chamber (30) into a first chamber (301) and a second chamber (302). One end of the piston rod (14) extends into the air chamber (30) and is connected to the first piston (13), and the other end extends into the glue outlet channel (10) and is connected to the valve rod (22); Two air connectors (12) are provided, and the two air connectors (12) are respectively connected to the first cavity (301) and the second cavity (302).

5. The glue gun according to claim 4, characterized in that, The drive assembly (1) also includes a return spring (15) and a second piston (16). The cylinder (11) also has a front chamber (40), which is spaced apart from the air chamber (30) along the first direction (X); The reset spring (15) and the second piston (16) are both disposed in the front cavity (40) and are both sleeved on the piston rod (14). The piston rod (14) can drive the second piston (16) to move along the first direction (X). When the valve rod (22) is in the first position and the second position, the reset spring (15) is in a compressed state.

6. The glue gun according to claim 5, characterized in that, The cylinder body (11) includes a rear cylinder (111), a front cylinder (112), and a cylinder block (113) connected in sequence. The cylinder seat (113) is connected to the valve body (21), the rear cylinder (111) and the front cylinder (112) surround the air chamber (30), and the front cylinder (112) and the cylinder seat (113) surround the front chamber (40).

7. The glue gun according to claim 4, characterized in that, The valve body (21) includes a sealing seat (213), a main valve body (214), and a front cover (215) connected in sequence. The sealing seat (213) is disposed between the drive assembly (1) and the main valve body (214). One end of the glue outlet channel (10) is located inside the main valve body (214), and the other end passes through the front cover (215). The piston rod (14) passes through the sealing seat (213) and extends into the main valve body (214). The glue nozzle (24) is connected to the front cover (215).

8. The glue gun according to claim 7, characterized in that, The dispensing assembly (2) further includes a locking nut (26). A fixing part (241) is protruding on the outer wall of the nozzle (24). The fixing part (241) is located at one end of the nozzle (24) near the front cover (215). The locking nut (26) is sleeved on the nozzle (24) and threadedly connected to the front cover (215). The fixing part (241) is clamped between the locking nut (26) and the front cover (215).

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