Glue feeding mechanism and glue gun

Abstract

The utility model relates to the technical field of hot melt glue guns, and discloses a glue feeding mechanism and a glue gun. The glue feeding mechanism comprises glue feeding wheels, the two sides of a glue stick are each provided with a row of glue feeding wheels, the two rows of glue feeding wheels are symmetrically arranged along the central axis of the glue stick, each row of glue feeding wheels comprises at least two glue feeding wheels, and the glue stick is driven to move when the glue feeding wheels rotate. And the glue stick conveying continuity is good.

Description

Technical Field

[0001] The present application relates to the technical field of hot melt glue guns, for example, to a glue delivery mechanism and a glue gun. Background Art

[0002] There are generally two types of glue feeding mechanisms for hot melt glue guns on the market, namely manual glue feeding and electric glue feeding. In industry, hot melt glue guns are used in large quantities in the bonding process, which puts higher requirements on the power and glue quality of hot melt glue guns, so electric glue feeding solutions are often used. The prior art usually adopts a solution of a pair of driving wheels driving the glue stick. During the implementation process, the inventor found that the electric glue feeding mechanism of a pair of driving wheels has at least the following problems: the focus point is single and uneven, and the continuity of the glue stick delivery is poor.

[0003] The above information disclosed in this Background section is only for understanding the background of the present application concept and therefore it may contain information that does not constitute prior art. Utility Model Content

[0004] The present application provides a glue delivery mechanism and a glue gun, which include at least four force points, balanced force points, and good continuity in glue stick delivery.

[0005] In a first aspect, a glue feeding mechanism is provided, wherein a row of glue feeding wheels are respectively arranged on both sides of the glue stick, and the positions of the two rows of glue feeding wheels are symmetrically arranged along the central axis of the glue stick. Each row of glue feeding wheels includes at least two glue feeding wheels, and when the glue feeding wheels rotate, the glue stick is driven to move.

[0006] It ensures that the forces applied on both sides of the glue stick are balanced, which helps prevent the glue stick from shifting or rotating during transportation. Since each glue feeding wheel is in contact with the glue stick, the number of points of force is increased, thereby improving the distribution and uniformity of force. Compared with a traditional pair of driving wheels, the multi-feeding wheel design of the disclosed embodiment improves the continuity of the glue stick transportation. When the tail of the glue stick passes through the rearmost glue feeding wheel, the front glue feeding wheel can drive it. At the same time, a new glue stick can be installed, and the rearmost glue feeding wheel drives the new glue stick, reducing the risk of interruption or discontinuity of transportation caused by a single point of force.

[0007] Optionally, the glue feeding mechanism further includes a guide structure, which includes a guide groove and a mounting groove, wherein the guide groove can accommodate the glue stick to move forward and backward; and the mounting groove is rotatably arranged in the glue feeding wheel.

[0008] Optionally, an opening is provided on the guide groove, and the glue feeding wheel partially extends out of the opening to contact the glue stick.

[0009] Optionally, the bottom of the guide groove is an arc-shaped groove surface, and the arc-shaped groove surface is adapted to the shape of the surface of the glue stick.

[0010] Optionally, the glue feeding mechanism also includes a driving gear, a gear set, and a gear rack. The driving gear is connected to the rotating actuator; the gear set is transmission-connected to the glue feeding wheel and the driving gear to transfer power from the driving gear to the glue feeding wheel; the gear rack is connected to the guide structure to limit the gear set and enable it to work normally.

[0011] Optionally, the gear set includes a first gear, a second gear, and a third gear, wherein the first gear is coaxially arranged with one row of rubber feeding wheels; the second gear is coaxially arranged with the other row of rubber feeding wheels and meshes with the first gear corresponding to the other side of the glue stick; the third gear, adjacent second gears are respectively meshed with the corresponding third gear; wherein one of the first gear and the second gear is connected to the driving gear.

[0012] Optionally, the glue feeding mechanism further includes a retaining frame, which is used to fix the rotating actuator, and the retaining frame is connected to the gear frame.

[0013] Optionally, a positioning groove is provided on the gear rack, and the positioning groove can accommodate the motor.

[0014] Optionally, the rubber feeding wheel is a toothed wheel.

[0015] In a second aspect, a glue gun is provided, comprising any glue delivery mechanism of the first aspect.

[0016] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0018] Figure 1 is a schematic diagram of a glue feeding mechanism provided in an embodiment of the present disclosure;

[0019] Figure 2 It is a schematic diagram of the overall assembly of the glue feeding mechanism provided in the embodiment of the present disclosure;

[0020] Figure 3 is a schematic diagram of a guide structure provided by an embodiment of the present disclosure;

[0021] Figure 4 is an exploded schematic diagram of a glue feeding mechanism provided in an embodiment of the present disclosure;

[0022] Figure 5 is a bottom view schematic diagram of a gear set provided by an embodiment of the present disclosure;

[0023] Figure 6 is a schematic front view of a gear set provided by an embodiment of the present disclosure;

[0024] Figure 7 It is a schematic diagram of the structure of the retaining frame provided in an embodiment of the present disclosure.

[0025] Figure 8 It is a schematic diagram of the lower structure of the gear rack provided in an embodiment of the present disclosure.

[0026] Fig. 9 It is a schematic diagram of the lower part of the guide structure provided in an embodiment of the present disclosure.

[0027] Fig.10 It is a schematic diagram of the upper part of the gear rack provided in an embodiment of the present disclosure.

[0028] Fig.11 It is a schematic diagram of the glue gun structure provided in an embodiment of the present disclosure.

[0029] Fig.12 It is a structural schematic diagram of another embodiment of the guide structure provided in the embodiment of the present disclosure.

[0030] Fig.13 It is a schematic structural diagram of another embodiment of the retaining frame provided in the embodiment of the present disclosure.

[0031] Reference numerals:

[0032] 31. Guide structure; 32. Mounting groove; 33. Guide groove; 34. Opening; 35. Arc groove surface; 36. Positioning groove 2; 37. Through hole 1; 38. Observation window; 41. Second gear; 42. Third gear; 43. First gear; 44. Driving gear; 50. Gear rack; 51. Through hole 2; 52. Positioning groove; 53. Positioning groove 1; 61. Retaining rack; DETAILED DESCRIPTION

[0033] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0034] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0035] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0036] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0037] Unless otherwise stated, the term "plurality" means two or more.

[0038] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0039] A hot melt glue gun is a tool that uses electricity as energy to melt the glue stick to complete the pasting work. The hot melt glue gun uses electricity to heat, melt the glue stick and squeeze out the glue to bond various materials. It is widely used in electronics factories, food factories, packaging factories, etc., as well as in handmade production, such as pasting cartons, stabilizing wood, plastic, metal, etc.

[0040] Glue stick, also known as hot melt glue stick or hot melt adhesive strip, is a solid adhesive made of ethylene-vinyl acetate copolymer (EVA) as the main material. The glue stick is solid at room temperature, and it can flow and become sticky after being heated to a certain temperature, which makes it convenient to use in a variety of bonding scenarios. Conventional glue sticks are cylindrical, and this application uses this shape as an example.

[0041] A rubber feed wheel is a mechanical component specifically designed to transport glue sticks stably and efficiently. Rubber feed wheels are usually made of wear-resistant materials such as plastic, rubber or silicone to enhance their durability and reduce friction during transportation. They can be smooth or textured, depending on the type of glue stick that needs to be transported and the amount of friction required. The size and shape of the rubber feed wheel vary according to application requirements, but are usually cylindrical so that they can rotate evenly and maintain a stable conveying speed. The rubber feed wheel is driven mechanically or electrically to rotate and push the glue stick forward. This rotation can be achieved by a motor or other mechanical transmission device. The friction between the rubber feed wheel and the glue stick is the key force to drive the glue stick to move. Appropriate friction ensures that the glue stick can be transported continuously and smoothly without slipping or blocking.

[0042] A rotary actuator is a mechanical device that can convert input energy into rotary motion. Such devices play a vital role in modern industrial automation. They are widely used in various control systems to achieve precise position control and operation. The rotary actuator in the embodiment of the present disclosure is a motor. A motor, commonly known as a motor, is an electromagnetic device that realizes the conversion or transmission of electrical energy according to the law of electromagnetic induction.

[0043] The present invention aims to solve the problem that a pair of driving wheels are used to drive the delivery of glue sticks, resulting in a single and uneven force point and poor continuity in the delivery of glue sticks. Figure 1 , 2 As shown, a row of rubber feeding wheels is provided on both sides of the glue stick, one row of which is rubber feeding wheels 11 and 12, and the other row is rubber feeding wheels 21 and 22. The positions of the two rows of rubber feeding wheels are symmetrically arranged along the central axis of the glue stick, ensuring that the forces applied on both sides of the glue stick are balanced, which helps to prevent the glue stick from shifting or rotating during transportation. Each row of rubber feeding wheels includes at least two rubber feeding wheels, which drive the glue stick to move when the rubber feeding wheels rotate. Since each rubber feeding wheel is in contact with the glue stick, the number of force points is increased, thereby improving the distribution and uniformity of force. Compared with a traditional pair of driving wheels, the multi-rubber feeding wheel design of the embodiment of the present disclosure improves the continuity of the glue stick transportation. When the tail of the glue stick passes through the rearmost rubber feeding wheel, the front rubber feeding wheel can drive it. At the same time, a new glue stick can be installed, and the rearmost rubber feeding wheel drives the new glue stick, reducing the risk of interruption or discontinuity of transportation caused by a single force point.

[0044] Optional, such as Figure 3, and also includes a guide structure 31, which includes: a guide groove 33 and a mounting groove 32. The guide groove 33 is a channel for accommodating the glue stick, allowing the glue stick to move smoothly in the front-to-back direction. The function of the guide groove 33 is to limit the lateral movement of the glue stick to ensure that it is transported along a predetermined path. The mounting groove 32, in which the rubber feeding wheel is rotatably arranged. The mounting groove 32 is the installation position of the rubber feeding wheel, and the rubber feeding wheel rotates in this groove. The design of the mounting groove 32 ensures the effective contact between the rubber feeding wheel and the glue stick, while allowing the wheel body to rotate freely to drive the glue stick to move.

[0045] Optionally, the guide groove 33 is provided with an opening 34, and the rubber feeding wheel partially extends out of the opening 34 to contact the glue stick. This design enables the rubber feeding wheel to directly contact the glue stick and provide the necessary driving force while keeping the glue stick moving stably in the guide groove 33.

[0046] Optionally, the bottom of the guide groove 33 is an arcuate groove surface 35, and the arcuate groove surface 35 is adapted to the surface shape of the glue stick. The design of the arcuate groove surface 35 allows each contact point of the glue stick to obtain better support, reduces concentrated stress, and thus reduces the risk of deformation and damage of the glue stick during transportation. In addition, this design also helps to reduce the movement instability caused by the irregular shape of the glue stick, and improves the smoothness and consistency of the overall transportation.

[0047] Optionally, a through hole 37 is provided on the guide structure 31 for facilitating the extension of the rubber feeding wheel, and the through hole 37 connects the bottom of the guide structure 31 and the mounting groove 32 .

[0048] Optional, such as Fig.12 The mounting groove is arranged on the wall of the guide groove, and an observation window 38 is arranged in the direction of the mounting groove away from the glue stick. The observation window is conducive to observing the state of the glue feeding wheel, saving materials, and preventing the mounting groove from rubbing the glue feeding wheel.

[0049] Optional, such as Figure 4-6 , also includes: a driving gear 44, a gear set, and a gear rack 50 arranged below the guide structure 31, the driving gear 44 is connected to the rotating actuator; the driving gear 44 in the embodiment of the present disclosure is directly connected to the rotating actuator (such as a motor). This design ensures that the power transmission from the power source to the glue feeding system is efficient and responsive, optimizes the energy utilization efficiency, and reduces the energy loss of the system during startup and operation. The gear set is connected to the glue feeding wheel and the driving gear 44 to transfer power from the driving gear 44 to the glue feeding wheel. As a key link connecting the driving gear 44 and the glue feeding wheel, the gear set not only transmits power, but also plays a role in adjusting the rotation speed and increasing the torque. This allows each glue feeding wheel to maintain a uniform speed and pressure even when facing glue sticks of different sizes and resistances, thereby ensuring the continuity and stability of the conveying process. The gear rack 50 is connected to the guide structure 31 and is used to limit the gear set and enable it to work normally, such as Fig. 9 The gear rack 50 cooperates with the guide structure 31 to define the position of the gear set. The gear rack 50 not only fixes and protects the gear set, but also ensures the correct installation and alignment of the gear set. Through precise installation, the gear rack 50 avoids excessive wear and jamming between gears, prolongs the service life of the entire transmission system, and reduces the maintenance frequency.

[0050] like Fig.10 The gear frame 50 is provided with a second through hole 51 for facilitating the connection between the motor and the driving gear 44 , and the second through hole 51 passes through the gear frame 50 .

[0051] The guide structure 31 is connected to the gear frame 50 via bolts.

[0052] Optionally, the gear set includes: a first gear 43, a second gear 41, and a third gear 42. The first gear 43 is coaxially arranged with one row of rubber feeding wheels; each first gear 43 is coaxially arranged with one row of rubber feeding wheels, and is responsible for directly transmitting power to the row of rubber feeding wheels. This configuration ensures direct transmission of power, reduces energy loss, and improves transmission efficiency. The second gear 41 is coaxially arranged with another row of rubber feeding wheels, and meshes with the first gear 43 corresponding to the other side of the glue stick; each second gear 41 is coaxially arranged with another row of rubber feeding wheels, and is not only responsible for directly transmitting power to the row of rubber feeding wheels, but also responsible for transmitting power from one side to the other side, ensuring that the rubber feeding wheels on both sides can operate evenly and synchronously. Adjacent second gears 41 are meshed with corresponding third gears 42 respectively; adjacent second gears 41 are meshed with corresponding third gears 42. This design is used to transmit power to the rubber feeding wheels arranged in the moving direction of the glue stick. Among them, one of the first gear 43 and the second gear 41 is connected to the driving gear 44. Among the first gear 43 and the second gear 41, one is selected to be directly connected to the driving gear 44. This design allows the driving force to be directly input into the gear set, thereby improving the responsiveness and sensitivity of the entire system. By carefully selecting the connection points, the power distribution can be further optimized to ensure that each rubber feeding wheel can obtain the necessary power to maintain stable and efficient operation. Fig. 9 , 10 The rotating shafts of the first gear 43, the second gear 41, and the third gear 42 are matched with the positioning groove 521 on the upper part of the gear frame 50 and the positioning groove 522 36 of the guide structure 31, and the rotating shafts are rotatably matched with the positioning grooves 52.

[0053] Optional, such as Figure 7, also includes: a motor, a retaining frame 61, the rotating actuator is a motor, and the motor is connected to the driving gear 44; the motor is used as a power source and is responsible for providing driving force to start the operation of the entire glue feeding mechanism. The motor is directly connected to the driving gear 44, and its design and configuration ensure efficient power transmission from the motor to the driving gear 44, and then to the glue feeding wheel through the gear set. This efficient transmission design minimizes energy loss and ensures rapid response and stable operation of the system. The retaining frame 61 is used to fix the motor and is connected to the gear frame 50.

[0054] The gear carrier 50 and the retaining frame 61 are connected by bolts.

[0055] Optional, such as Fig.13 , the lower part of the cage is a cross-shaped support plate.

[0056] Optional, such as Figure 8 , a positioning groove 52 is provided at the lower part of the gear frame 50, and the positioning groove 52 can accommodate the motor. The main function of the positioning groove 52 is to accommodate and position the motor. This design not only ensures the stability and correct installation position of the motor, but also minimizes the position deviation and vibration during installation by accurately matching the size and shape of the motor. Anti-vibration pads or buffer layers may be provided inside the groove. These measures help absorb the vibration generated during operation, protect the motor from excessive vibration, and extend the service life of the equipment. By adopting the positioning groove 52 design, the installation process of the motor is simplified, and no additional complex tools or fixtures are required, making the installation process faster and more economical. In addition, this design is also convenient for future maintenance and replacement work. The open design of the positioning groove 52 allows for quick disassembly and reassembly of the motor.

[0057] Optionally, the rubber feeding wheel is a toothed wheel, which provides better friction and propulsion efficiency, can effectively grab and push the glue stick, and can maintain a good transmission effect even when the surface of the glue stick is smooth or has high viscosity.

[0058] like Fig.11 The embodiment of the present disclosure provides a glue gun, including any of the glue feeding mechanisms described above. Since it has the same glue feeding mechanism, it has all the technical effects of the glue feeding mechanism.

[0059] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A glue feeding mechanism, characterized in that: It includes a rubber feeding wheel. A row of rubber feeding wheels are respectively arranged on both sides of the glue stick. The positions of the two rows of rubber feeding wheels are symmetrically arranged along the central axis of the glue stick. Each row of rubber feeding wheels includes at least two rubber feeding wheels. When the rubber feeding wheels rotate, they drive the glue stick to move.

2. The glue feeding mechanism according to claim 1, characterized in that: Also included is a guide structure, which includes: The guide groove can accommodate the glue stick to move forward and backward; The rubber feeding wheel is rotatably arranged in the installation groove.

3. The glue feeding mechanism according to claim 2, characterized in that: An opening is arranged on the guide groove, and the glue feeding wheel part extends out of the opening to contact the glue stick.

4. The glue feeding mechanism according to claim 2, characterized in that: The bottom of the guide groove is an arc-shaped groove surface, and the arc-shaped groove surface is adapted to the shape of the surface of the glue stick.

5. The glue feeding mechanism according to claim 2, characterized in that: Also includes: A driving gear connected to the rotary actuator; The gear set is connected with the rubber feeding wheel and the driving gear to transmit power from the driving gear to the rubber feeding wheel; The gear rack is connected to the guide structure and is used to define the gear set and enable it to work normally.

6. The glue feeding mechanism according to claim 5, characterized in that: The gear set includes: The first gear is coaxially arranged with one row of rubber feeding wheels; The second gears are coaxially arranged with the other row of rubber feeding wheels and mesh with the first gears corresponding to the other side of the glue stick; A third gear, wherein adjacent second gears are respectively meshed with corresponding third gears; Among them, one of the first gear and the second gear is connected to the driving gear.

7. The glue feeding mechanism according to claim 5, characterized in that: It also includes a retaining frame, which is used to fix the rotating actuator and is connected to the gear frame.

8. The glue feeding mechanism according to claim 7, characterized in that: The gear frame is provided with a positioning groove, and the positioning groove can accommodate the rotating execution structure.

9. The glue feeding mechanism according to any one of claims 2 to 8, characterized in that: An observation window is arranged on the direction of the installation groove away from the glue stick.

10. A glue gun, characterized in that: It comprises the glue feeding mechanism as described in any one of claims 1 to 9.

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