Lightweight electric glue squeezing gun and its main body

Abstract

The present invention relates to a portable electric glue gun and its main body in the technical field of electric tools, including a glue gun frame, a limit cover assembly, a push rod driving assembly, a push rod and a reduction gear mechanism; the glue gun frame is made of resin material and is integrally formed through an injection molding process, and the glue gun frame is used as a carrier. After the reduction gear mechanism, the push rod, the push rod driving assembly and the limit cover assembly are installed on the glue gun frame, the reduction gear mechanism is connected to the drive motor, and the push rod is driven to perform linear motion to push out the glue in the rubber hose installed in the glue gun frame to perform the glue application operation. The present invention adopts an integrated glue gun frame structure of resin material, and cooperates with a limit cover assembly of metal material, which can achieve various performance indicators of the electric glue gun. Compared with the split structure of the rubber hose frame and the core shell and the metal material in the prior art, the structural weight and material cost are greatly reduced, the assembly efficiency is improved, and the operating efficiency is improved by effectively reducing the fatigue of the user.

Description

Technical Field

[0001] This invention relates to the field of power tool technology, specifically to a portable electric glue gun and its main body. Background Technology

[0002] An electric glue gun is a tool for applying glue, widely used in industries such as building decoration, electronics, automobiles and auto parts, and shipbuilding and containers.

[0003] Currently, electric glue guns primarily consist of a separate glue tube frame and a core housing, both made of metal. Some are made of iron, which saves costs, while others use aluminum, but this increases costs. Furthermore, the weight of the metal glue tube frame and core housing causes hand fatigue for the operator after only a short period of use, reducing work efficiency. The separate structure also reduces assembly efficiency, while using a one-piece aluminum alloy injection-molded structure is difficult and expensive, making it impractical. Additionally, during glue application, the operator needs to continuously press the clutch switch, which also exacerbates operator fatigue and reduces work efficiency.

[0004] A search of existing technologies revealed Chinese Utility Model Patent Publication No. CN209735973U, which discloses an electric glue gun. The gun includes a glue tube holder for holding the glue tube, a push rod mounted on the holder for moving the glue inside the tube towards the glue cap, and a power unit fixed to the glue tube holder to provide power to the push rod to move the glue inside the tube towards the glue cap. The power unit includes a motor, a reducer connected to the output shaft of the motor, and a push rod power unit connected to the output shaft of the reducer and providing displacement motion to the push rod. The reducer includes a final-stage planetary reduction mechanism that provides power to the push rod power unit, and the output shaft of the reducer is mounted on the planetary carrier of the final-stage planetary reduction mechanism. This utility model suffers from the problem of requiring continuous pressing of a clutch switch during the glue application process. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the purpose of this invention is to provide a lightweight electric glue extrusion gun and its main body.

[0006] According to the present invention, a lightweight electric glue gun body includes a glue gun holder, a limiting cover assembly, a push rod drive assembly, a push rod, and a reduction gear mechanism.

[0007] The glue gun holder is made of resin material and integrally formed by injection molding. The glue gun holder includes a glue tube holder and a core housing. The glue tube holder and the core housing share a common end plate and the core housing has two sets of coaxial through holes on the rear end plate of the core housing opposite to the common end plate. The through holes are used for the end of the push rod to pass through and allow the push rod to move axially. The side of the push rod is provided with teeth.

[0008] The limiting cover assembly includes a middle cover and a top cover, both of which are made of metal. The middle cover has a shaft hole in the middle and a driven shaft mounting groove at one end. The lower surface of the top cover has a drive shaft limiting groove and a driven shaft limiting groove. The reduction gear mechanism is installed inside the mechanism housing. The middle cover is installed in the mechanism housing and limits the reduction gear mechanism inside the mechanism housing. The drive shaft of the reduction gear mechanism passes through the shaft hole.

[0009] The push rod drive assembly includes a drive gear, a driven gear, and a driven shaft. The drive gear is sleeved on the drive shaft. One end of the driven shaft is rotatably connected to the driven shaft mounting groove. The driven gear is sleeved on the driven shaft and meshes with the drive gear. The ends of the two push rods pass through the two sets of through holes and enter the housing of the hose holder. The two push rods mesh with the drive gear and the driven gear respectively through the teeth. The upper cover covers the movement housing. One end of the drive shaft is rotatably connected to the drive shaft limiting groove, and the other end of the driven shaft is rotatably connected to the driven shaft limiting groove.

[0010] In some embodiments, the area where the side plate of the hose frame transitions to the bottom plate is provided with a first hollow area, and multiple load-bearing columns are connected in the first hollow area. Two adjacent load-bearing columns are connected to form a V-shaped structure. The load-bearing columns serve as flow channels during injection molding to allow liquid fluid to flow from the bottom plate to the side plate.

[0011] In some embodiments, the connection between the hose frame and the core housing is provided with a clearance hole, and / or, the front end plate of the hose frame opposite to the common end plate is thickened, and the front end plate of the hose frame is provided with a clearance groove.

[0012] In some embodiments, the outer surface of the side plate of the hose rack is provided with a first reinforcing rib, the first reinforcing rib being arranged along the axial direction of the hose rack and close to the hatch of the hose rack, and / or,

[0013] The mechanism housing includes a drive compartment and a power compartment. The drive compartment is located on the power compartment. A second reinforcing rib is provided on the outer peripheral surface of the connection between the drive compartment and the power compartment. The second reinforcing rib is arc-shaped.

[0014] In some embodiments, the driven shaft mounting groove is a circular groove, and a portion of the driven shaft mounting groove protrudes outward, making the intermediate cover as a whole cam-shaped.

[0015] In some embodiments, the intermediate cover is provided with two sliding grooves, which are arranged on both sides of the shaft hole. The sliding grooves are used to slide in contact with the lower surface of the push rod. The outer sides of the two sliding grooves are respectively provided with first limiting plates, which are referred to as the first left limiting plate and the first right limiting plate. The driven shaft mounting groove is offset by a preset distance towards the first right limiting plate. A third reinforcing rib is provided on the inner side of the first left limiting plate. The third reinforcing rib contacts the side of the push rod driven by the drive gear.

[0016] In some embodiments, the lower surface of the upper cover is further provided with a limiting block and a second limiting plate. The two second limiting plates are respectively located on both sides of the driving shaft limiting groove. The two second limiting plates are respectively marked as the second left limiting plate and the second right limiting plate. The second left limiting plate is provided with a fourth reinforcing rib. The side of the push rod that meshes with the active gear is in sliding contact with the fourth reinforcing rib.

[0017] The limiting block is disposed between the second left limiting plate and the drive shaft limiting groove and between the second right limiting plate and the drive shaft limiting groove, and the end face of the limiting block is a concave surface;

[0018] After the upper cover is connected to the mechanism housing, the end faces of the first left limiting plate and the second left limiting plate are in contact, the end faces of the first right limiting plate and the second right limiting plate are in contact, and the concave surface of the limiting block is in sliding contact with the upper surface of the push rod.

[0019] In some embodiments, the reduction gear mechanism is a multi-stage planetary gear reduction mechanism, the reduction gear mechanism includes a one-way clutch gear ring, the outer peripheral surface of the one-way clutch gear ring is evenly distributed with multiple gear teeth, the space between two gear teeth is a tooth groove surface, the gear teeth include a ramp surface, a smooth surface and a stop surface, the ramp surface, the smooth surface and the stop surface are connected in sequence;

[0020] When the one-way clutch gear rotates in the forward direction, the ramp surface used as the stop part of the clutch switch automatically slides onto the smooth surface, and then enters the next tooth groove surface through the smooth surface, thereby completing the continuous rotation in one direction. The stop surface is used to cooperate with the stop part of the clutch switch to prevent the one-way clutch gear from rotating in the reverse direction.

[0021] In some embodiments, the inclination angle α of the ramp surface is 45°-75°, and the inclination angle α refers to the angle between the profile of the ramp surface and the normal at the connection between the ramp surface and the tooth groove surface.

[0022] The present invention also provides a portable electric glue extrusion gun, which adopts the aforementioned portable electric glue extrusion gun body.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. This invention adopts an integrated glue gun holder structure made of resin material, combined with a limiting cap assembly made of metal material, which can achieve the various performance indicators of electric glue gun. Compared with the separate structure of glue tube frame and core shell and the metal material in the prior art, it significantly reduces structural weight and material cost, improves assembly efficiency, and improves work efficiency by effectively reducing user fatigue.

[0025] 2. By implementing anti-cavity and reinforcement treatments on the integrated glue gun holder structure, this invention can ensure the surface accuracy of the integrally molded glue gun holder and improve its structural strength.

[0026] 3. This invention improves the overall structural strength of the integrated glue gun holder and further reduces its weight by optimizing the design of the glue gun holder structure.

[0027] 4. This invention further enhances the limiting effect on the push rod by optimizing the design of the corresponding structure in the limiting cover assembly, thereby improving the transmission effect and preventing damage to the glue gun holder caused by the deviation of the push rod movement.

[0028] 5. Through the optimized design of the reduction gear mechanism, this invention eliminates the need to press the clutch switch during the operation of the electric glue gun, freeing the operator from some of the pressing actions, reducing operator fatigue, and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0030] Figure 1 This is a schematic diagram of the overall exploded structure of the present invention;

[0031] Figure 2 This is a three-dimensional view of the glue gun holder of the present invention. Figure 1 ;

[0032] Figure 3 This is a three-dimensional view of the glue gun holder of the present invention. Figure 2 ;

[0033] Figure 4 This is a rear view of the glue gun holder of the present invention;

[0034] Figure 5 This is a schematic diagram of the structure of the middle cover of the present invention;

[0035] Figure 6 A schematic diagram of the structure of the upper cover of this invention;

[0036] Figure 7This is a schematic diagram of the unidirectional clutch gear ring of the present invention. Detailed Implementation

[0037] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0038] Example 1

[0039] This invention provides a lightweight electric glue gun body, such as Figures 1-7 As shown, the device includes a glue gun holder 1, a limiting cover assembly 2, a push rod drive assembly 3, a push rod 4, and a reduction gear mechanism 5. The glue gun holder 1 serves as a carrier. After the reduction gear mechanism 5, the push rod 4, the push rod drive assembly 3, and the limiting cover assembly 2 are installed on the glue gun holder 1, the reduction gear mechanism 5 is connected to the drive motor, which drives the push rod 4 to perform linear motion, so as to push out the glue in the glue tube installed in the glue gun holder 1 for glue application.

[0040] The glue gun holder 1 is a resin material integrally molded using injection molding. It includes a glue tube holder 11 and a core housing 12. The glue tube holder 11 is used to hold and store glue tubes containing glue. The core housing 12 includes a drive chamber 121 for mounting a push rod drive assembly 3, a drive chamber 121 for passing through and accommodating push rods 4, and a power chamber 122 for mounting a reduction gear mechanism 5. In the integrally molded glue gun holder 1, the glue tube holder 11 and the core housing 12 share a common end plate. The common end plate serves as the rear end plate of the glue tube holder 11 and the front end plate of the core housing 12. Correspondingly, two sets of coaxial through holes 101 are provided on the common end plate and the rear end plate of the core housing 12. The ends of the two push rods 4 pass through the two sets of coaxial through holes 101 and enter the accommodating chamber of the glue tube holder 11 to push the movable push plate of the glue tube to extrude glue. A clearance hole 102 is formed at the connection between the hose frame 11 and the core housing 12. Specifically, clearance holes 102 are formed at the connection between the hose frame 11 and the drive compartment 121 and the connection between the hose frame 11 and the power compartment 122. Since the hose frame 11 and the core housing 12 are both made of resin material and injection molded into an integral structure, a reinforcing structure is formed at the connection between the hose frame 11 and the core housing 12 to ensure the connection strength. The formation of the reinforcing structure requires the injection of a large amount of fluid material into the reinforcing part. During the injection molding process, the reinforcing part often has an uneven surface due to the large amount of shrinkage during cooling and molding, which affects the structural strength of the reinforcing structure. Therefore, the clearance hole structure at the reinforcing structure can effectively avoid the problem of uneven surface at the reinforcing part, thereby making the structure of the reinforcing part more uniform and avoiding affecting the connection strength.

[0041] The front end plate of the hose holder 11 serves as the structure for securing the hose. During the process of the push rod 4 discharging the adhesive from the hose, it acts as the main load-bearing component. The front end plate of the hose holder 11 is thickened to enhance structural strength. This thickening means that the thickness of the front end plate is greater than the thickness of the side plates, bottom plate, and rear end plate of the hose holder 11. Similar to the optimized structural design of clearance holes, this design also exists on the thickened front end plate of the hose holder 11. Due to the thickening of the front end plate, there is a higher chance of surface unevenness during injection molding. Therefore, clearance grooves 103 are provided on the thickened front end plate of the hose holder 11. The clearance grooves 103 also ensure good symmetry of the surface structure of the front end plate of the hose holder 11, guaranteeing structural strength. The hose frame 11 has an open hatch structure. During the glue application process, the hatch opening is easily stretched by the axial thrust generated by the push rod 4, which can lead to deformation or even breakage. To address this, a first reinforcing rib 112 is provided on the outer surface of the side plate of the hose frame 11. The first reinforcing rib 112 extends axially along the hose frame 11 and is located close to the hatch opening. Both side plates of the hose frame 11 are provided with the first reinforcing rib 112 symmetrically, with at least one first reinforcing rib 112 on each side plate. The core housing 12 is mainly used for the installation of the transmission structure. During the axial movement of the push rod 4 driven by the push rod drive assembly 3 and the reduction gear mechanism 5, the two push rods 4 will also transmit the radial force transmitted by the transmission gear to the core housing 12. To ensure the structural strength of the core housing 12, a second reinforcing rib 123 is formed at the transition connection between the drive compartment 121 and the power compartment 122. The second reinforcing rib 123 is arc-shaped and is closely attached to the outer peripheral surface of the connection between the drive compartment 121 and the power compartment 122 to form a reinforcing structure. Preferably, the two second reinforcing ribs 123 form a semicircle and are located near the lower part of the rear end plate of the core housing 12, while the reinforcement of the other half of the structure is achieved by the connection structure between the core housing 12 and the hose frame 11.

[0042] The limiting cover assembly 2 mainly includes a middle cover 21 and a top cover 22. Both the middle cover 21 and the top cover 22 are made of metal and are integrally formed. Preferably, both the middle cover 21 and the top cover 22 are made of aluminum or aluminum alloy to ensure strength while reducing overall weight. The middle cover 21 has a shaft hole 211 in the middle. One end of the middle cover 21 has a driven shaft mounting groove 212. Preferably, two sliding grooves 213 are provided on both sides of the shaft hole 211. The outer sides of the two sliding grooves 213 are respectively connected to first limiting plates 214. The two first limiting plates 214 are referred to as the first left limiting plate 2140 and the first right limiting plate 2141. The lower surface of the top cover 22 has a drive shaft limiting groove 221 and a driven shaft limiting groove 222. The positions of the drive shaft limiting groove 221 and the driven shaft limiting groove 222 are adapted to the shaft hole 211 and the driven shaft mounting groove 212, respectively. Preferably, a second limiting plate 224 is provided on both sides of the drive shaft limiting groove 221, and the two second limiting plates 224 are respectively referred to as the second left limiting plate 2240 and the second right limiting plate 2241. The push rod drive assembly 3 includes a driving gear 31, a driven gear 32, and a driven shaft 33. There are two push rods 4, and each push rod 4 has teeth 41 on its side.

[0043] The working principle of this invention is as follows: After the reduction gear mechanism 5 is installed in the power compartment 122 of the core shell 12 of the glue gun holder 1, which is integrally molded from resin material, the intermediate cover 21 is closed on the power compartment 122 and the main body of the reduction gear mechanism 5 is confined within the power compartment 122. At the same time, the drive shaft 51 of the reduction gear mechanism 5 passes through the shaft hole 211, the driving gear 31 is sleeved on the drive shaft 51 and rotates with the drive shaft 51, and one end of the driven shaft 33 is rotatably connected in the driven shaft mounting groove 212. At this time, it is preferable to achieve the rotatable connection through the bearing. The driven gear 32 is sleeved on the driven shaft 33 and meshes with the driving gear 31. The two push rods 4 pass through the through holes 101 on the rear end plate of the core shell 12 respectively. After passing through the through hole 101 on the common end plate, its end enters the receiving compartment of the hose rack 11. At this time, the teeth 41 on the two push rods 4 mesh with the driving gear 31 and the driven gear 32 respectively. The two sliding grooves 213 slide in contact with the lower surfaces of the two push rods 4 respectively. Then, the upper cover 22 is closed and connected to the drive compartment 121, so that the free end of the drive shaft 51 is rotatably connected to the drive shaft limiting groove 221 through the bearing, and the other end of the driven shaft 33 is rotatably connected to the driven shaft limiting groove 222 through the bearing. At the same time, the end faces of the first left limiting plate 2140 and the second left limiting plate 2240, as well as the end faces of the first right limiting plate 2141 and the second right limiting plate 2241, are in contact and limit the push rod 4. After the reduction gear mechanism 5 connects to the drive motor and other components, it drives the push rod 4 to move. The push rod 4 initially has only an axial displacement tendency under the limitation of the two sets of axial through holes 101. At the same time, the lower surface of the push rod 4 slides in contact with the slide groove 213 and is restricted from radial movement. Meanwhile, the push rod driven by the drive gear 31 is limited by the drive gear 31 and the first left limiting plate 2140 and the second left limiting plate 2240 located on the outside. The push rod driven by the driven gear 31 is limited by the driven gear 31 and the first right limiting plate 2141 and the second right limiting plate 2241 located on the outside. In addition, the lower surface of the upper cover 22 can slide in contact with the upper surface of the push rod 4 to form a limit. Thus, the push rod 4 moves axially under the action of the driving force, thereby squeezing out the glue in the glue tube and completing the glue application.

[0044] This invention employs an integrated glue gun holder structure made of resin material, combined with a limiting cap assembly made of metal material, which can achieve the various performance indicators of an electric glue gun. Compared with the existing technology of separate structures of glue tube holder and core shell and metal material, it significantly reduces structural weight and material cost, improves assembly efficiency, and improves work efficiency by effectively reducing user fatigue.

[0045] Example 2

[0046] This embodiment 2 is based on embodiment 1. Through optimized design of the hose holder structure, the overall structural strength of the integrated glue gun holder is improved, and its weight is further reduced. Specifically:

[0047] like Figures 2-4 As shown, the hose rack 11 in the integrated glue gun holder 1 forms a first hollow area 111 by a hollowing method. The first hollow area is rectangular or racetrack-shaped. The first hollow area 111 is the part where the hose rack 11 transitions from the side plate to the bottom plate. There are two sets of first hollow areas 111 arranged symmetrically, that is, the first hollow area 111 is formed at the transition part from the side plate to the bottom plate of the hose rack 11. The first hollow area 111 is arranged in the axial direction of the hose rack 11, and the first hollow area 111 is connected with a load-bearing column 1110. There are multiple load-bearing columns 1110 in the first hollow area 111 on each side, and two adjacent load-bearing columns 1110 are connected to form a V-shaped structure, so that the multiple load-bearing columns 1110 in each side form a grid in the first hollow area 111. The load-bearing column 1110 not only serves as a reinforcing rib structure for the first hollow area 111, but also acts as a flow channel for liquid fluid during injection molding. This allows the liquid fluid to flow quickly from the bottom plate of the tube frame 11 to the side plate, preventing the liquid fluid from flowing slowly due to a single flow channel. This would prevent the fluid from cooling to the point or far end, causing the temperature to drop excessively and preventing sufficient injection molding. During cooling and molding, this would result in large deformation of the point or far end, affecting the structural strength and reducing the product yield.

[0048] Example 3

[0049] This embodiment 3 is formed based on embodiment 1 or embodiment 2. Through optimized design of the corresponding structure in the limiting cover assembly, the limiting effect on the push rod is further improved, the transmission effect is enhanced, and damage to the glue gun holder is prevented due to deviation of the push rod movement. Specifically:

[0050] like Figure 5 As shown, in the structural design of the intermediate cover 21, its driven shaft mounting groove 212 is a circular groove structure. The outward protrusion of the circular groove structure of the driven shaft mounting groove 212 makes the overall shape of the intermediate cover 21 cam-shaped. Compared with the existing technology where the driven shaft mounting groove 212 adopts a semi-circular structure, which requires a circular limit to be formed by another semi-circular groove on the movement housing, the integral structural frame can effectively ensure that the positions of the drive shaft and the driven shaft are relatively fixed, reduce the influence of external vibration on their relative positions, and ensure transmission efficiency. In addition, after the outward protrusion of the driven shaft mounting groove 212 is combined with the corresponding limit position on the movement housing 12, it can effectively improve the stability of the intermediate cover 21 during operation.

[0051] The shaft hole 211 and the driven shaft mounting groove 212 on the intermediate cover 21 have a certain eccentric relationship. This eccentricity means that the center of the shaft hole 211 and the center of the driven shaft mounting groove 212 form an angle with the central axis of the intermediate cover 21. Specifically, the shaft hole 211 is located in the middle of the intermediate cover 21, while the driven shaft mounting groove 212 is offset a certain distance towards one of the first limiting plates 214. This axial misalignment allows the drive gear and driven gear to mesh and drive the two push rods respectively. For ease of description, the driven shaft mounting groove 212 is offset a certain distance towards the first right limiting plate 214. Furthermore, when the driven shaft mounting groove 212 is offset to the right, the radial force on the push rod 4 driven by the drive gear 31 is greater than the radial force on the push rod 4 driven by the driven gear 32. Therefore, a third reinforcing rib 215 is formed on the side of the first left limiting plate 2140, and further, a fourth reinforcing rib 225 is formed on the side of the second left limiting plate 2240. The structural design of the third reinforcing rib 215 and the fourth reinforcing rib 225 can effectively offset the large radial external force of the drive gear 31 on the push rod 4, thereby ensuring the structural stability of the middle cover 21 and the upper cover 22.

[0052] like Figure 6 As shown, a limiting block 223 is formed on the lower surface of the upper cover 22. The limiting block 223 is disposed between the drive shaft limiting groove 221 and the second left limiting plate 2240, and between the drive shaft limiting groove 221 and the second right limiting plate 2241. The end face of the limiting block 223 is a concave surface, which is used to adapt to and slide in contact with the upper surface of the push rod 4 and limit its movement. The term "between the drive shaft limiting groove 221 and the second left limiting plate 2240" refers to the position between the two axial ends of the upper cover 22, and not just the area between the outlines of the drive shaft limiting groove 221 and the second left limiting plate 2240. Similarly, the meaning of "between the drive shaft limiting groove 221 and the second right limiting plate 2241" is consistent with the meaning of "between the drive shaft limiting groove 221 and the second left limiting plate 2240". Two limiting blocks 223 are located on each side of the drive shaft limiting groove 221, and the two limiting blocks 223 are arranged in the same row along the axial direction of the upper cover 22. When the upper cover 22 is closed and connected to the mechanism housing 12, the concave surface of the limiting block 223 slides in contact with the upper surface of the push rod 4, thereby effectively limiting the push rod 4, improving the accuracy of the linear movement of the push rod 4, and further restricting the tendency of the push rod 4 to deviate to both sides, thus effectively preventing the push rod 4 from being damaged by collision with the glue gun holder 1 due to deviation during movement.

[0053] Example 4

[0054] This embodiment 4 is based on any one of embodiments 1-3. Through optimized design of the reduction gear mechanism, the electric glue gun does not require pressing the clutch switch during operation, freeing the operator from some of the pressing actions, reducing operator fatigue, and improving work efficiency. Specifically:

[0055] The reduction gear mechanism 5 is a multi-stage planetary gear mechanism, see [link / reference]. Figure 1 The multi-stage planetary gear includes structural components such as a planet carrier, planetary gears, a gear ring, and a snap ring. The basic structure and working principle of the multi-stage planetary gear can be found in the utility model patent with publication number CN209735973U mentioned in the background section. The main improvement of the reduction gear mechanism 5 in this embodiment lies in the clutch gear ring, specifically, the clutch gear ring is optimized into a one-way clutch gear ring 52, as shown below. Figure 7 As shown, the inner circumferential surface of the one-way clutch gear ring 52 is evenly distributed with meshing teeth, and its outer circumferential surface is evenly distributed with multiple gear teeth 521. The tooth groove surface 522 is between two adjacent gear teeth 521. The structure of the gear teeth 521 is a trapezoidal block structure, which includes a ramp surface 5210, a smooth surface 5211, and a stop surface 5212. The ramp surface 5210, the smooth surface 5211, and the stop surface 5212 are smoothly connected in sequence. At the same time, the ramp surface 5210 and the tooth groove surface 522, as well as the stop surface 5212 and the tooth groove surface 522, are also smoothly connected. That is, the outer circumferential surface of the one-way clutch gear ring 52 has a smooth curve transition design.

[0056] The trapezoidal teeth 521 evenly distributed on the outer circumference of the one-way clutch gear ring 52 allow the clutch switch 6, which limits the rotation of the one-way clutch gear ring 52, to climb up the ramp surface 5210 onto the smooth surface 5211 when the one-way clutch gear ring 52 rotates in the forward direction. Then, it slides down the smooth surface 5211 onto the tooth groove surface 522, repeating the next action. This means the reduction gear mechanism 5 can rotate continuously without pressing the clutch switch, thus continuously driving the push rod 4 forward. To stop, simply press the power switch. When the push rod 4 needs to be reset, pressing the clutch switch disengages the clutch switch's stop from the one-way clutch gear ring 52, allowing the clutch gear ring 52 to rotate in the reverse direction and the push rod 4 to reset. Forward rotation refers to the rotational motion that drives the push rod forward, squeezing the rubber inside the tube.

[0057] Preferably, the inclination angle α of the ramp surface 5210 is designed to be 45°-75°, and particularly preferably, the inclination angle α of the ramp surface 5210 is 60°. Here, the inclination angle of the ramp surface 5210 refers to the angle between the surface of the ramp surface 5210 and the normal at the connection point between the ramp surface 522 and the tooth groove surface 522. When the inclination angle α of the ramp surface 5210 is less than 45°, it is difficult for the stop part of the clutch switch to move upward along the ramp surface 5210, and jamming is likely to occur. When the inclination angle α of the ramp surface 5210 is greater than 75°, it will cause the height of the gear tooth 521 to be too low or the angle at the transition point from the smooth surface 5211 to the stop surface 5212 to be too small, resulting in poor stopping effect or unstable movement of the stop part of the clutch switch 6 and the stop surface 5212.

[0058] Example 5

[0059] This embodiment 5 is an electric glue gun formed based on any one of the embodiments 1-4. It adopts the lightweight electric glue gun body described in any one of the embodiments 1-4, and also includes a handheld housing, a drive motor, a lithium battery, a control circuit board, a control switch, and a clutch switch, etc.

[0060] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, 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 application.

[0061] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A portable electric glue squeezing gun body, characterized in that: It comprises a glue gun frame (1), a limit cover assembly (2), a push rod drive assembly (3), a push rod (4) and a reduction gear mechanism (5); The glue gun frame (1) is made of resin material and is integrally formed by an injection molding process. The glue gun frame (1) comprises a hose frame (11) and a movement shell (12). A common end plate of the hose frame (11) and the movement shell (12) and a rear end plate of the movement shell (12) opposite to the common end plate are provided with two groups of coaxial through holes (101). The through holes (101) are used for the end of the push rod (4) to pass through and enable the push rod (4) to move axially. The side surface of the push rod (4) is provided with teeth (41); The limiting cover assembly (2) comprises an intermediate cover (21) and an upper cover (22), the intermediate cover (21) and the upper cover (22) are both made of metal, a shaft hole (211) is provided in the middle of the intermediate cover (21), a driven shaft mounting groove (212) is provided at one end of the intermediate cover (21), a driving shaft limiting groove (221) and a driven shaft limiting groove (222) are provided on the lower surface of the upper cover (22), the reduction gear mechanism (5) is installed in the movement housing (12), the intermediate cover (21) is installed in the movement housing (12) and limits the reduction gear mechanism (5) in the movement housing (12), and the driving shaft (51) of the reduction gear mechanism (5) passes through the shaft hole (211); The push rod driving assembly (3) comprises a driving gear (31), a driven gear (32) and a driven shaft (33); the driving gear (31) is sleeved on the driving shaft (51); one end of the driven shaft (33) is rotatably connected to the driven shaft mounting groove (212); the driven gear (32) is sleeved on the driven shaft (33) and meshes with the driving gear (31); the ends of the two push rods (4) respectively pass through the two sets of through holes. The push rods (4) are respectively meshed with the driving gear (31) and the driven gear (32) through the teeth (41); the upper cover (22) covers the movement housing (12); the end of the driving shaft (51) is rotatably connected to the driving shaft limiting groove (221); and the other end of the driven shaft (33) is rotatably connected to the driven shaft limiting groove (222); A first hollow area (111) is provided in the area where the side plate of the hose rack (11) transitions to the bottom plate, a plurality of load-bearing columns (1110) are connected in the first hollow area (111), two adjacent load-bearing columns (1110) are connected to form a V-shaped structure, and the load-bearing columns (1110) serve as flow channels during injection molding to allow liquid fluid to flow from the bottom plate to the side plate; A clearance hole (102) is provided at the connection between the hose rack (11) and the movement housing (12), and / or a front end plate of the hose rack (11) opposite to the common end plate is thickened, and a clearance groove (103) is provided on the front end plate of the hose rack (11); The driven shaft mounting groove (212) is a circular groove, and a portion of the driven shaft mounting groove (212) is convex outwards, so that the middle cover (21) is cam-shaped as a whole; The middle cover (21) is provided with two slide grooves (213), the two slide grooves (213) are arranged on both sides of the shaft hole (211), the slide grooves (213) are used to slide in contact with the lower surface of the push rod (4), the outer sides of the two slide grooves (213) are respectively provided with first limit plates (214), the two first limit plates (214) are respectively recorded as a first left limit plate (2140) and a first right limit plate (2141), the driven shaft mounting groove (212) is offset by a preset distance toward one side of the first right limit plate (2141), and a third reinforcing rib (215) is provided on the inner side surface of the first left limit plate (2140), and the third reinforcing rib (215) is in contact with the side surface of the push rod (4) driven by the driving gear (31); A limit block (223) and a second limit plate (224) are further provided on the lower surface of the upper cover (22); the two second limit plates (224) are respectively located on both sides of the drive shaft limit groove (221); the two second limit plates (224) are respectively marked as a second left limit plate (2240) and a second right limit plate (2241); the second left limit plate (2240) is provided with a fourth reinforcing rib (225); and the side surface of the push rod (4) meshing with the driving gear (31) is in sliding contact with the fourth reinforcing rib (225); The limit block (223) is arranged between the second left limit plate (2240) and the drive shaft limit groove (221), and between the second right limit plate (2241) and the drive shaft limit groove (221), and the end surface of the limit block (223) is an inner concave surface; After the upper cover (22) is connected to the movement housing (12), the end faces of the first left limit plate (2140) and the second left limit plate (2240) are in contact with each other, the end faces of the first right limit plate (2141) and the second right limit plate (2241) are in contact with each other, and the inner concave surface of the limit block (223) is in sliding contact with the upper surface of the push rod (4).

2. The portable electric glue squeezing gun body according to claim 1 is characterized in that: A first reinforcing rib (112) is provided on the outer surface of the side plate of the hose rack (11), the first reinforcing rib (112) being arranged along the axial direction of the hose rack (11) and close to the hatch of the hose rack (11), and\or, The movement housing (12) comprises a drive cabin (121) and a power cabin (122); the drive cabin (121) is located on the power cabin (122); a second reinforcing rib (123) is provided on the outer peripheral surface of the connection between the drive cabin (121) and the power cabin (122); the second reinforcing rib (123) is in an arc shape.

3. The portable electric glue squeezing gun body according to claim 1 or 2, characterized in that: The reduction gear mechanism (5) is a multi-stage planetary gear reduction mechanism, the reduction gear mechanism (5) comprising a one-way clutch gear ring (52), a plurality of gear teeth (521) being evenly distributed on the outer peripheral surface of the one-way clutch gear ring (52), a tooth groove surface (522) being provided between two gear teeth (521), the gear teeth (521) comprising a slope surface (5210), a smooth surface (5211) and a stop surface (5212), the slope surface (5210), the smooth surface (5211) and the stop surface (5212) being connected in sequence; When the one-way clutch gear ring (52) rotates forward, the ramp surface (5210) is used for the stop portion of the clutch switch to automatically slide onto the smooth surface (5211), and then enter the next tooth groove surface (522) through the smooth surface (5211), thereby completing the one-way continuous rotation, and the stop surface (5212) is used to cooperate with the stop portion of the clutch switch to prevent the one-way clutch gear ring (52) from rotating in the reverse direction.

4. The portable electric glue squeezing gun body according to claim 3 is characterized in that: The inclination angle α of the slope surface (5210) is 45°-75°, and the inclination angle α refers to the angle between the profile of the slope surface (5210) and the normal line at the connection between the slope surface (5210) and the tooth groove surface (522).

5. A portable electric glue squeezing gun, characterized in that: A portable electric glue squeezing gun body as described in any one of claims 1 to 4 is used.

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