Gluing gun

Abstract

The utility model relates to the technical field of gluing guns, and discloses a gluing gun which comprises a gun body, a valve rod assembly and a trigger, the gun body is provided with a discharging port, a valve cavity, a feeding port and a transmission port, the feeding port, the discharging port and the transmission port are respectively communicated with the valve cavity, the gun body is provided with a sealing cavity, and the sealing cavity is located on one side of the transmission port and communicated with the transmission port; the valve rod assembly comprises a valve rod body, a first sealing ring, a plugging fixing piece and a transmission assembly, the first sealing ring is connected into the sealing cavity and is in sealing fit with the transmission opening, the plugging fixing piece is connected to the cavity opening end of the sealing cavity, one end of the valve rod is slidably arranged in the valve cavity, and the other end of the valve rod sequentially penetrates through the transmission opening, the first sealing ring and the plugging fixing piece; the transmission assembly is connected to the gun body. The valve rod is in transmission connection with the transmission assembly. The trigger is rotationally connected to the gun body and is in transmission connection with the transmission assembly. According to the gluing gun disclosed by the utility model, the sealing performance of the gluing gun is improved, and leakage is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of glue spreading gun, in particular to a glue spreading gun. BACKGROUND

[0002] At present, in the automobile glue spreading process, the glue spreading of the door and the side wall work station of the general assembly workshop generally adopts manual glue gun, the viscosity of the glue is high, the pressure is big, and the sealing property of the glue spreading gun has strict requirements. The conventional manual glue gun has poor sealing property, and leakage is easily caused. INNOVATION

[0003] The utility model provides a glue spreading gun, improves the sealing property of the glue spreading gun, and avoids causing leakage.

[0004] In order to realize the above-mentioned purpose, the utility model provides a glue spreading gun, including gun body, valve rod assembly and trigger, the gun body is equipped with discharge port, valve cavity, feed port and transmission port, the feed port, the discharge port and transmission port are communicated with the valve cavity respectively, the gun body is equipped with sealing cavity, the sealing cavity is located at the side of transmission port and is communicated with the transmission port,

[0005] The valve rod assembly includes valve rod body, first sealing ring, plugging fixed part and transmission assembly, the first sealing ring is connected in the sealing cavity and is sealed with the transmission port, the plugging fixed part is connected to the chamber mouth end of the sealing cavity, one end of the valve rod is slidably arranged in the valve cavity, the other end of the valve rod passes through the transmission port, the first sealing ring and the plugging fixed part in turn, the transmission assembly is connected to the gun body, and the valve rod is in transmission connection with the transmission assembly.

[0006] The trigger is rotationally connected to the gun body, and the trigger is in transmission connection with the transmission assembly.

[0007] As a preferred scheme, the gun body includes a gun body and a valve seat, the valve cavity, the transmission port and the sealing cavity are arranged in the gun body, the valve seat is provided with a glue outlet channel, the discharge port is located at one end of the glue outlet channel towards the valve cavity, the glue outlet channel is communicated with the valve cavity through the discharge port, one end of the valve seat is inserted into the valve cavity, the gun body is provided with a second sealing ring, and the second sealing ring is connected between the valve seat and the gun body.

[0008] As a preferred scheme, one side of the gun body towards the valve seat is provided with a first mounting groove, the valve seat includes a seat body and a plug-in part, one end of the plug-in part is connected with the seat body, the plug-in part protrudes towards one side of the gun body, the plug-in part is inserted into the valve cavity, and the second sealing ring is sleeved on the outer periphery of the plug-in part and connected to the first mounting groove.

[0009] As a preferred solution, the gun body further comprises a handle and a feeding pipe, the feeding port is arranged on the lower side of the gun body, the upper end of the handle is connected with the gun body, the handle is provided with a mounting channel, the mounting channel penetrates through both ends of the handle, the feeding pipe is connected with the mounting channel and communicates with the feeding port.

[0010] As a preferred solution, a third sealing ring is arranged in the mounting channel, the third sealing ring is located in the mounting channel, the third sealing ring surrounds one end of the feeding pipe towards the feeding port, and the third sealing ring is in sealing cooperation with the feeding port.

[0011] As a preferred solution, the transmission assembly comprises a valve rod seat, an elastic return member and an adjusting member, the rear part of the gun body is provided with an adjusting cavity, the valve rod seat and the adjusting member are respectively located at both ends of the adjusting cavity, the elastic return member is located in the adjusting cavity, the adjusting member is threadedly connected with the adjusting cavity, both ends of the elastic return member are respectively in abutment with the adjusting member and the valve rod seat, and the valve rod seat is connected with the valve rod body.

[0012] As a preferred solution, the valve rod seat is provided with a valve rod connecting hole, the valve rod connecting hole is coaxially arranged with the valve rod body, and the valve rod body is inserted into the valve rod connecting hole.

[0013] As a preferred solution, the transmission assembly further comprises a top sheet member, the top sheet member is connected with the valve rod body, and the top sheet member is in transmission connection with the trigger.

[0014] As a preferred solution, the top sheet member comprises a connecting plate and a push arm, the connecting plate is provided with a mounting hole, the valve rod body is connected with the mounting hole, one end of the push arm is connected with the connecting plate, and the other end of the push arm is in abutment with the trigger.

[0015] As a preferred solution, the top sheet member further comprises a top sheet nut, the top sheet nut is connected with the valve rod body, and the connecting plate is located between the top sheet nut and the valve rod seat.

[0016] The utility model discloses a kind of glue gun compared with prior art, its beneficial effect is at: gun body is equipped with discharge port, valve cavity, feed port, transmission port and sealing cavity, among them, valve cavity is as the core passage of glue flow, valve cavity is connected with feed port and discharge port, realize the storage and directional delivery of glue material.Sealing cavity provides independent space for the sliding seal of valve stem body, isolates transmission port and external environment.Transmission port is as the sliding channel of valve stem body, allow valve stem body to penetrate to transmission assembly.Through the split cavity setting of valve cavity in combination with sealing cavity, realize the physical isolation of glue flow path and transmission assembly, avoid glue material to contaminate transmission component.Sealing cavity is communicated with transmission port, sealing cavity provides the installation space of first sealing ring, ensure the stability of dynamic seal.Valve stem assembly includes valve stem body, first sealing ring, plugging fixing piece and transmission assembly.Valve stem body controls the on-off of valve cavity by axial sliding and transmits driving force.Through single valve stem body, glue material on-off control and power transmission are realized simultaneously, simplify structure and reduce failure rate.First sealing ring forms dynamic seal cooperation with transmission port, prevent glue material from leaking to sealing cavity from transmission port.Plugging fixing piece fixes first sealing ring and closes the open end of sealing cavity, forms second static seal barrier.First sealing ring combines plugging fixing piece and forms double-sealing structure, transmission assembly converts the rotary motion of trigger into the axial linear motion of valve stem body.Trigger is connected to gun body to realize fixed, trigger triggers transmission assembly by rotation, and valve stem body is driven by transmission assembly and moves along axial direction.The axial motion of valve stem body is consistent with the axial compression direction of first sealing ring, avoid lateral wear of first sealing ring, improve the service life of first sealing ring. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the overall structure schematic diagram of the utility model embodiment.

[0018] Figure 2 It is the cross section structure schematic diagram of the overall structure of the utility model embodiment.

[0019] Figure 3 It is the enlarged structure schematic diagram of A in the utility model embodiment Figure 2

[0020] Figure 4 It is the structure schematic diagram of gun body of the utility model embodiment.

[0021] Figure 5 It is the structure schematic diagram of valve stem assembly of the utility model embodiment.

[0022] Figure 6 It is the structure schematic diagram of top sheet piece of the utility model embodiment.

[0023] Figure 7 It is the structure schematic diagram of trigger of the utility model embodiment.

[0024] In the drawing:​

[0025] 10, gun body; 11, gun body; 12, first mounting groove; 13, valve cavity; 14, feed port; 15, transmission port; 16, sealing cavity; 17, valve seat; 18, seat body; 19, plug-in part; 20, glue outlet channel; 21, discharge port; 22, second sealing ring; 23, handle; 24, mounting channel; 25, third sealing ring; 26, feed pipe; 27, adjusting cavity;

[0026] 30, valve stem assembly; 31, valve stem body; 32, first sealing ring; 33, plugging fixing piece; 34, transmission assembly; 35, valve stem seat; 36, valve stem connecting hole; 37, elastic reset piece; 38, adjusting piece; 39, top piece; 40, connecting plate; 41, mounting hole; 42, push arm; 43, top piece nut; 44, transmission groove;

[0027] 50, trigger. DETAILED DESCRIPTION

[0028] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0029] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like in the present application are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0030] In the description of the present application, it should be understood that the terms "connected", "connected", "fixed" and the like in the present application should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be weldedly connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] As Figures 1 to 7As shown, the utility model discloses a kind of glue gun of preferred embodiment, including gun body 10, valve stem assembly 30 and trigger 50, gun body 10 is equipped with discharge port 21, valve cavity 13, feed port 14 and transmission port 15, feed port 14, discharge port 21 and transmission port 15 are communicated with valve cavity 13 respectively, gun body 10 is equipped with sealing cavity 16, sealing cavity 16 is located the side of transmission port 15 and is communicated with transmission port 15;

[0032] Valve stem assembly 30 includes valve stem body 31, first sealing ring 32, plugging fixed part 33 and transmission assembly 34, first sealing ring 32 is connected in sealing cavity 16 and is sealed with transmission port 15 cooperation, plugging fixed part 33 is connected to the chamber mouth end of sealing cavity 16, one end of valve stem is slidably arranged in valve cavity 13, the other end of valve stem sequentially passes through transmission port 15, first sealing ring 32 and plugging fixed part 33, transmission assembly 34 is connected to gun body 10, valve stem is drivingly connected with transmission assembly 34;

[0033] Trigger 50 is rotatably connected to gun body 10, and trigger 50 is drivingly connected with transmission assembly 34.

[0034] The glue gun of the utility model, the gun body 10 is equipped with a discharge port 21, a valve cavity 13, a feeding port 14, a transmission port 15 and a sealing cavity 16, wherein the valve cavity 13 is used as the core channel of glue flow, the valve cavity 13 is communicated with the feeding port 14 and the discharge port 21, and the storage and directional conveying of glue are realized. The sealing cavity 16 provides an independent space for the sliding sealing of the valve rod body 31, and the transmission port 15 is isolated from the external environment. The transmission port 15 is used as the sliding channel of the valve rod body 31, and the valve rod body 31 is allowed to penetrate into the transmission assembly 34. Through the split cavity setting of the valve cavity 13 combined with the sealing cavity 16, the physical isolation of the glue flow path and the transmission assembly 34 is realized, and the glue pollution of the transmission component is avoided. The sealing cavity 16 is communicated with the transmission port 15, the sealing cavity 16 provides the mounting space of the first sealing ring 32, and the stability of dynamic sealing is ensured. The valve rod assembly 30 comprises the valve rod body 31, the first sealing ring 32, the plugging fixing part 33 and the transmission assembly 34. The valve rod body 31 controls the on-off of the valve cavity 13 through axial sliding and transmits driving force. The single valve rod body 31 realizes the on-off control of glue and power transmission at the same time, simplifies the structure and reduces the failure rate. The first sealing ring 32 is dynamically sealed with the transmission port 15, preventing glue from leaking from the transmission port 15 to the sealing cavity 16. The plugging fixing part 33 fixes the first sealing ring 32 and closes the open end of the sealing cavity 16, forming a second static sealing barrier. The first sealing ring 32 and the plugging fixing part 33 form a double sealing structure, and the transmission assembly 34 converts the rotary motion of the trigger 50 into the axial linear motion of the valve rod body 31. The trigger 50 is fixedly connected to the gun body 10, the trigger 50 drives the transmission assembly 34 through rotation, and drives the valve rod body 31 to move axially through the transmission assembly 34. The axial motion of the valve rod body 31 is consistent with the axial compression direction of the first sealing ring 32, avoiding the lateral wear of the first sealing ring 32 and improving the service life of the first sealing ring 32.

[0035] As one of the embodiments, as shown in Figure 3 The outer periphery of the plugging fixing part 33 is threadedly connected with the inner side wall of the sealing cavity 16, and the plugging fixing part 33 is detachably connected with the sealing cavity 16, so that the first sealing ring 32 can be quickly replaced, the maintenance time is short, and the maintenance efficiency is improved.

[0036] As one of the embodiments, the trigger 50 is connected with the gun body 11 through a transmission shaft.

[0037] Further, as shown in Figure 3As shown, the gun body 10 includes a gun body 11 and a valve seat 17, the valve cavity 13, the transmission port 15 and the sealing cavity 16 are arranged on the gun body 11 respectively, the valve seat 17 is provided with a glue outlet channel 20, the discharge port 21 is located at one end of the glue outlet channel 20 towards the valve cavity 13, the glue outlet channel 20 is communicated with the valve cavity 13 through the discharge port 21, one end of the valve seat 17 is inserted into the valve cavity 13, the gun body 10 is provided with a second sealing ring 22, and the second sealing ring 22 is connected between the valve seat 17 and the gun body 11. The glue outlet channel 20 penetrates through both sides of the valve seat 17 in the axial direction, after the glue material enters the material cavity from the feeding port 14, it is sprayed out after entering the glue outlet channel 20 through the discharge port 21, and the second sealing ring 22 is arranged between the valve seat 17 and the gun body 11, thereby improving the connection sealing performance of the gun body 11 and the valve seat 17, and avoiding leakage of the glue from the connection between the gun body 11 and the valve seat 17.

[0038] Further, as shown in the drawings, Figure 3 The gun body 11 is provided with a first mounting groove 12 on one side towards the valve seat 17, the valve seat 17 includes a seat body 18 and a plug-in part 19, one end of the plug-in part 19 is connected with the seat body 18, the plug-in part 19 protrudes towards one side of the gun body 11, the plug-in part 19 is inserted into the valve cavity 13, the second sealing ring 22 is sleeved on the outer periphery of the plug-in part 19 and connected with the first mounting groove 12. The valve seat 17 is inserted into the valve cavity 13 through the plug-in part 19, so that the valve seat 17 can enter the valve cavity 13 more deeply, increase the contact area between the plug-in part 19 and the valve cavity 13, thereby improving the sealing performance between the valve seat 17 and the valve cavity 13. The first mounting groove 12 provides mounting space for the second sealing ring 22, so that the sealing ring can closely fit the seat body 18 and the first mounting groove 12, thereby effectively preventing the glue from leaking from the connection between the valve seat 17 and the gun body 11.

[0039] Further, as shown in the drawings, Figure 2 The gun body 10 further includes a handle 23 and a feeding pipe 26, the feeding port 14 is arranged on the lower side of the gun body 11, the upper end of the handle 23 is connected with the gun body 11, the handle 23 is provided with a mounting channel 24, the mounting channel 24 penetrates through both ends of the handle 23, and the feeding pipe 26 is connected with the mounting channel 24 and communicated with the feeding port 14. The handle 23 is provided with the mounting channel 24, so that the installation and dismounting of the feeding pipe 26 are more convenient, and the user can operate and maintain conveniently. The feeding port 14 is arranged on the lower side of the gun body 11, and the feeding pipe 26 is built in the mounting channel 24 of the handle 23, so that the user can complete the input of the glue without adjusting the posture during operation, thereby improving the comfort and efficiency of operation. The mounting channel 24 penetrates through both ends of the handle 23, so that the connection between the feeding pipe 26 and the handle 23 is more stable, and the feeding pipe 26 is prevented from loosening or falling off due to vibration or external force. The feeding pipe 26 is integrated into the handle 23, thereby reducing the exposure of the external pipeline, improving the compactness of the structure, and reducing the overall volume of the equipment.

[0040] Further, as shown in the drawings,Figure 3 As shown in the figure, the third sealing ring 25 is arranged in the mounting channel 24, and the third sealing ring 25 is arranged around the one end of the feeding pipe 26 towards the feeding port 14, and the third sealing ring 25 is in sealing cooperation with the feeding port 14. The third sealing ring 25 is arranged in the mounting channel 24 and around the outer periphery of the feeding pipe 26, so that the sealing ring can be closely attached to the feeding pipe 26 and the feeding port 14, thereby effectively preventing the leakage of the rubber compound from the connection. At the same time, the third sealing ring 25 is more convenient to replace, which is convenient for the maintenance and maintenance of the equipment.

[0041] Further, as shown in Figure 3 and Figure 5 The transmission assembly 34 includes a valve rod seat 35, an elastic return member 37 and an adjusting member 38. The rear part of the gun body 10 is provided with an adjusting cavity 27. The valve rod seat 35 and the adjusting member 38 are respectively arranged at two ends of the adjusting cavity 27. The elastic return member 37 is arranged in the adjusting cavity 27. The adjusting member 38 is in threaded connection with the adjusting cavity 27. The two ends of the elastic return member 37 are respectively in abutment with the adjusting member 38 and the valve rod seat 35. The valve rod seat 35 is connected with the valve rod body 31. The valve rod seat 35 is fixedly connected with the valve rod body 31 and moves synchronously with the valve rod body 31. The elastic return member 37 is arranged in the adjusting cavity 27, and the adjusting cavity 27 limits the elastic return member 37. The two ends of the elastic return member 37 are respectively in abutment with the valve rod seat 35 and the adjusting member 38. The elastic return member 37 applies force to the valve rod body 31 through the valve rod seat 35, so that when the wrench does not apply force to the valve rod body 31, the valve rod body 31 abuts against the discharge port 21, and the discharge port 21 is in a closed state. At the same time, when the wrench applies force to the valve rod body 31, the valve rod body 31 is separated from the discharge port 21, and the discharge port 21 is in an open state. When the force of the wrench is eliminated, the elastic return member 37 promotes the axial movement of the valve rod body 31 towards the discharge port 21, the valve rod body 31 abuts against the discharge port 21, and the discharge port 21 is in a closed state. The adjusting member 38 is in threaded connection with the adjusting cavity 27. By rotating the adjusting member 38, the elastic return force of the elastic return member to the valve rod body 31 is adjusted, which is simple and convenient to operate.

[0042] As one of the embodiments, the outer periphery of the adjusting member 38 is provided with threads, and the inner wall of the adjusting cavity 27 is provided with threads. The adjusting member 38 is in threaded connection with the adjusting cavity 27.

[0043] Further, as shown in Figure 3 and Figure 5As shown in the drawings, the valve rod seat 35 is provided with a valve rod connecting hole 36 coaxially arranged with the valve rod body 31, which ensures that the valve rod seat 35 and the valve rod body 31 are on the same axis, thereby ensuring the stability of the valve rod during movement, reducing the eccentric wear and vibration, and improving the movement accuracy and response speed of the valve rod. The valve rod body 31 is inserted into the valve rod connecting hole 36, thereby realizing the connection and fixation of the valve rod seat 35 and the valve rod body 31, facilitating assembly, and effectively reducing production cost and improving production efficiency.

[0044] Further, as shown in the drawings, Figure 3 and Figure 5 , the transmission assembly 34 further includes a top piece 39 connected to the valve rod body 31 to realize the fixation of the top piece 39 and the valve rod body 31. The top piece 39 is in transmission connection with the trigger 50. The rotation of the trigger 50 drives the top piece 39 to move axially. The top piece 39 moves axially synchronously with the valve rod body 31, driving the valve rod body 31 to move away from the discharge port 21, so that the discharge port 21 is in an open state.

[0045] Further, as shown in the drawings, Figure 3 , Figure 5 and Figure 6 , the top piece 39 includes a connecting plate 40 and a push arm 42. The connecting plate 40 is provided with a mounting hole 41, and the valve rod body 31 is connected to the mounting hole 41. One end of the push arm 42 is connected to the connecting plate 40, and the other end of the push arm 42 is in abutment with the trigger 50. The valve rod body 31 is connected and fixed with the connecting plate 40 through the mounting hole 41. One end of the push arm 42 is connected to the connecting plate 40 to realize fixation. The other end of the push arm 42 is in abutment with the trigger 50. By rotating the trigger 50, the trigger 50 drives the push arm 42 to move. The push arm 42 drives the valve rod body 31 to move axially through the connecting plate 40, driving the valve rod body 31 to move away from the discharge port 21, so that the discharge port 21 is in an open state.

[0046] As one of the embodiments, as shown in the drawings, Figure 3 , Figure 5 and Figure 6 , the connecting plate 40 is connected with two push arms 42 respectively on both sides. The two push arms 42 are in abutment with the triggers 50 respectively on both sides of the gun body 11, so that the pushing force of the trigger 50 on the top piece 39 is more evenly distributed.

[0047] Further, as shown in the drawings, Figure 5 , the top piece 39 further includes a top piece nut 43 connected with the valve rod body 31. The connecting plate 40 is located between the top piece nut 43 and the valve rod seat 35. The valve rod seat 35 and the top piece nut 43 are respectively in threaded connection with the valve rod body 31. The top piece 39 is clamped between the valve rod seat 35 and the top piece nut 43, thereby realizing the positioning of the top piece 39 and the valve rod body 31. The assembly structure is simple, and the assembly efficiency is improved.

[0048] As one of the embodiments, as shown in the drawings,Figure 3 and Figure 7 As shown in the figure, the inner side of the trigger 50 is provided with a transmission groove 44, and one end of the push arm 42 is inserted into the transmission groove 44. The transmission groove 44 limits the push arm 42, and guarantees the transmission effectiveness of the wrench and the push arm 42.

[0049] In conclusion, the embodiment of the utility model provides a kind of glue gun, gun body 10 is equipped with discharge port 21, valve cavity 13, feed port 14, transmission port 15 and sealed cavity 16, wherein, valve cavity 13 as the core passage of glue flow, valve cavity 13 is connected with feed port 14 and discharge port 21, realize the storage and directional delivery of glue material.Sealed cavity 16 provides independent space for the sliding seal of valve stem body 31, isolates transmission port 15 and external environment.Transmission port 15 as the sliding channel of valve stem body 31, allow valve stem body 31 to penetrate to transmission assembly 34.Through the split cavity setting of valve cavity 13 in combination with sealed cavity 16, realize the physical isolation of glue flow path and transmission assembly 34, avoid glue pollution transmission component.Sealed cavity 16 is communicated with transmission port 15, and sealed cavity 16 provides the installation space of first sealing ring 32, to ensure the stability of dynamic seal.Valve rod assembly 30 includes valve stem body 31, first sealing ring 32, plugging fixing part 33 and transmission assembly 34.Valve stem body 31 controls the on-off of valve cavity 13 by axial sliding and transmits driving force.Through single valve stem body 31, glue on-off control and power transmission are realized simultaneously, structure is simplified and failure rate is reduced.First sealing ring 32 and transmission port 15 form dynamic sealing cooperation, to prevent glue from leaking from transmission port 15 to sealed cavity 16.Plugging fixing part 33 fixes first sealing ring 32 and closes the open end of sealed cavity 16, forms second static sealing barrier.First sealing ring 32 in combination with plugging fixing part 33 forms double sealing structure, and transmission assembly 34 converts the rotary motion of trigger 50 into the axial linear motion of valve stem body 31.Trigger 50 is connected to gun body 10 to realize fixation, and trigger 50 triggers transmission assembly 34 by rotating, and drives valve stem body 31 to move in axial direction by transmission assembly 34.The axial motion of valve stem body 31 is consistent with the axial compression direction of first sealing ring 32, to avoid lateral wear of first sealing ring 32, and improve the service life of first sealing ring 32.

[0050] The above is only the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled person in the art, without departing from the technical principle of the utility model, a number of improvements and substitutions can be made, and these improvements and substitutions should be regarded as the protection scope of the utility model.

Claims

1. A glue gun characterized by: The gun body, the valve rod assembly and the trigger, the gun body is provided with a discharge port, a valve cavity, a feed port and a transmission port, the feed port, the discharge port and the transmission port are communicated with the valve cavity respectively, the gun body is provided with a sealing cavity, the sealing cavity is located at one side of the transmission port and communicated with the transmission port; The valve rod assembly includes a valve rod body, a first sealing ring, a blocking fixed part and a transmission assembly, the first sealing ring is connected in the sealing cavity and sealingly cooperates with the transmission port, the blocking fixed part is connected to the cavity opening end of the sealing cavity, one end of the valve rod is slidingly arranged in the valve cavity, the other end of the valve rod sequentially passes through the transmission port, the first sealing ring and the blocking fixed part, the transmission assembly is connected to the gun body, the valve rod is drivingly connected with the transmission assembly; The trigger is rotationally connected to the gun body, and the trigger is drivingly connected with the transmission assembly.

2. The glue gun of claim 1, wherein: The gun body includes a gun body and a valve seat, the valve cavity, the transmission port and the sealing cavity are arranged in the gun body respectively, the valve seat is provided with a glue outlet channel, the discharge port is located at one end of the glue outlet channel facing the valve cavity, the glue outlet channel is communicated with the valve cavity through the discharge port, one end of the valve seat is inserted into the valve cavity, the gun body is provided with a second sealing ring, and the second sealing ring is connected between the valve seat and the gun body.

3. The glue gun of claim 2, wherein: A first mounting groove is arranged on one side of the gun body facing the valve seat, the valve seat includes a seat body and a plug-in part, one end of the plug-in part is connected with the seat body, the plug-in part protrudes towards one side of the gun body, the plug-in part is inserted into the valve cavity, and the second sealing ring is sleeved on the outer periphery of the plug-in part and connected to the first mounting groove.

4. The glue gun of claim 2, wherein: The gun body further includes a handle and a feed pipe, the feed port is arranged on the lower side of the gun body, the upper end of the handle is connected with the gun body, the handle is provided with a mounting channel, the mounting channel penetrates through both ends of the handle, and the feed pipe is connected with the mounting channel and communicated with the feed port.

5. The glue gun of claim 4, wherein: A third sealing ring is arranged in the mounting channel, the third sealing ring is located in the mounting channel, the third sealing ring surrounds one end of the feed pipe facing the feed port, and the third sealing ring sealingly cooperates with the feed port.

6. The glue gun of claim 1, wherein: The transmission assembly includes a valve rod seat, an elastic return member and an adjusting member, the rear part of the gun body is provided with an adjusting cavity, the valve rod seat and the adjusting member are located at both ends of the adjusting cavity respectively, the elastic return member is located in the adjusting cavity, the adjusting member is threadedly connected with the adjusting cavity, the both ends of the elastic return member abut against the adjusting member and the valve rod seat respectively, and the valve rod seat is connected with the valve rod body.

7. The glue gun of claim 6, wherein: The valve rod seat is provided with a valve rod connecting hole, the valve rod connecting hole is coaxially arranged with the valve rod body, and the valve rod body is inserted into the valve rod connecting hole.

8. The glue gun of claim 6, wherein: The transmission assembly further includes a top sheet member, the top sheet member is connected with the valve rod body, and the top sheet member is drivingly connected with the trigger.

9. The glue gun of claim 8, wherein: The top sheet piece comprises a connecting plate and a push arm, the connecting plate is provided with a mounting hole, the valve stem body is connected to the mounting hole, one end of the push arm is connected with the connecting plate, and the other end of the push arm abuts against the trigger.

10. The glue gun of claim 9, wherein: The top sheet piece further comprises a top sheet nut, the top sheet nut is connected with the valve stem body, and the connecting plate is located between the top sheet nut and the valve stem seat.

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