Linkage mechanism and electric glue gun

Abstract

The linkage mechanism comprises a fixed shaft, a driven gear and a driving gear are rotationally installed on the fixed shaft, and a transmission gear is further arranged between the driving gear and the driven gear; the driving gear is meshed with the transmission gear; in a conventional state, the transmission gear is separated from the driven gear, when the driving gear rotates, the transmission gear is driven to move towards the driven gear and is in meshed connection with the driven gear, and in the using process, racks on the glue gun are in meshed connection with one another; when gluing needs to be carried out, the driving gear rotates to drive the driven gear to rotate through the transmission gear, so that gluing is carried out, and when gluing is stopped, the transmission gear is separated from the driven gear, the driven gear can freely rotate on the fixing shaft, and therefore a rack on the glue gun can return to the original position conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of electric glue guns, in particular to a linkage mechanism and an electric glue gun. Background Art

[0002] The existing electric glue gun uses an electric rack drive device inside the gun body to drive a rack to move forward, and a glue cartridge holder is connected to the front end of the gun body, and a glue cartridge is installed on the glue cartridge holder. When the rack drive device drives the rack to move forward, the rack pushes the piston in the glue cartridge forward, pushing the glue in the glue cartridge forward to the front end of the glue cartridge for use.

[0003] When the above-mentioned electric glue gun is in use, in order to release the rack that has advanced to the limit position so that the rack can be pulled back to its original position and the piston in the glue cylinder can be pushed again, a clutch structure is provided on the driving gear of the rack driving device that directly drives the rack to return to its original position, or the rack can be returned to its original position only through the driving device. Summary of the invention

[0004] The purpose of the present invention is to provide a linkage mechanism to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a linkage mechanism, including a fixed shaft, on which a driven gear and a driving gear are rotatably mounted, and a transmission gear is also arranged between the driving gear and the driven gear; the driving gear is meshed and connected with the transmission gear; under normal conditions, the transmission gear and the driven gear are separated, and when the driving gear rotates, the driving transmission gear moves toward the driven gear and meshes and connects with the driven gear.

[0006] Compared with the prior art, during use, the rack on the glue gun is meshed with the rack; when gluing is required, the driving gear rotates to drive the driven gear to rotate through the transmission gear, thereby gluing is carried out. When gluing stops, the transmission gear is separated from the driven gear, and the driven gear can rotate freely on the fixed shaft, thereby facilitating the return of the rack on the glue gun to its original position.

[0007] According to the preferred technical solution of the present invention, the driven gear includes a fixing hole and a coaxially arranged connecting hole in the middle, a rolling bearing is fixedly installed in the fixing hole, and the rolling bearing is fixedly installed on the fixed shaft; a spring is arranged in the connecting hole, and the spring is sleeved on the fixed shaft, one end of the spring abuts against the rolling bearing in the fixing hole, and the other end abuts against the driven gear.

[0008] According to a preferred technical solution of the present invention, a mounting groove is provided on one side of the transmission gear, and the end of the spring is located in the mounting groove.

[0009] According to the preferred technical solution of the present invention, a plurality of mounting holes are evenly distributed radially along the center of the transmission gear, steel balls are arranged in the mounting holes, a slide groove adapted to the steel balls is arranged on the outer surface of the fixed shaft, and a plurality of transition grooves adapted to the steel balls are arranged on one side of the slide groove; one end of the transition groove is through-connected with the slide groove, and the other end extends toward the driving gear, and a plurality of transition grooves are spirally distributed on the outer surface of the fixed shaft.

[0010] According to the preferred technical solution of the present invention, a plurality of plug-in slots are evenly distributed along the axial direction on the transmission gear, and the driving gear is evenly distributed with the same number of driving posts as the plug-in slots, and the driving posts are located in the plug-in slots; a first push surface is obliquely arranged in the plug-in slot, and a second push surface is arranged on one side of the top of the driving post; the first push surface and the second push surface are in abutment with each other.

[0011] The invention also provides an electric glue gun, comprising the linkage mechanism.

[0012] The preferred technical solution of the present invention includes a shell and a glue barrel installed on one side of the shell; a fixed seat is fixedly installed in the shell, and the above-mentioned linkage mechanism is fixedly installed on the fixed seat; a push rod is slidably installed on the fixed seat, and the linkage mechanism is meshed and connected with the rack on the push rod; one end of the push rod extends into the glue barrel, and the other end extends outside the shell.

[0013] According to the preferred technical solution of the present invention, a rack is provided on the push rod, and the driven gear on the linkage mechanism is meshed and connected with the rack on the push rod; a through hole is provided on the fixed seat, and the push rod is located in the through hole and moves.

[0014] According to the preferred technical solution of the present invention, a planetary reducer and a motor are fixedly mounted on the fixed seat, and the output end of the motor and the input end of the planetary reducer are connected through a synchronous belt transmission; a through hole for the push rod to move is provided on the fixed seat, and a driving gear is fixedly mounted on the output end of the planetary reducer, and the driving gear is meshed and connected with the driving gear on the linkage mechanism.

[0015] In addition to the technical problems solved by the present invention, the technical features that constitute the technical solution, and the advantages brought by the technical features of the technical solution described above, other technical problems that can be solved by the present invention, other technical features included in the technical solution, and the advantages brought by these technical features will be further described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the transmission gear and the driven gear of the present invention when they are meshed and connected.

[0017] Figure 2 It is an AA cross-sectional view of the present invention.

[0018] Figure 3 It is a front view of the present invention when the transmission gear and the driven gear are separated.

[0019] Figure 4 It is a three-dimensional view of the fixed axis of the present invention.

[0020] Figure 5 It is a three-dimensional schematic diagram of the electric glue gun of the present invention.

[0021] Figure 6 It is a three-dimensional schematic diagram of the linkage mechanism of the present invention installed on the electric glue gun.

[0022] Explanation of the accompanying drawings: 01, fixed shaft; 02, driven gear; 03, driving gear; 04, transmission gear; 05, fixing hole; 06, connecting hole; 07, spring; 08, mounting groove; 09, mounting hole; 10, steel ball; 11, slide groove; 12, transition groove; 13, plug-in groove; 14, driving column; 15, first push surface; 16, second push surface; 17, housing; 18, rubber barrel; 19, fixing seat; 20, push rod; 21, planetary reducer; 22, motor. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] See also Figure 1-4 As shown, the linkage mechanism of the present invention is used to be installed on an electric glue gun to drive the pull rod on the electric glue gun to apply glue, and it includes a fixed shaft 01 installed in the electric glue gun, on which a driven gear 02 and a driving gear 03 are rotatably installed through a rolling bearing, and a transmission gear 04 is also arranged between the driving gear 03 and the driven gear 02. The driving gear 03 is meshed and connected with the transmission gear 04. When the driving gear 03 rotates on the fixed shaft 01, the driving gear 04 is driven to move toward the driven gear 02 and meshed and connected with the driven gear 02. The driven gear 02, the transmission gear 04 and the driving gear 03 are caused to rotate synchronously on the fixed shaft 01. When the driving gear 03 stops rotating, the transmission gear 04 and the driven gear 02 are separated.

[0025] The driven gear 02 includes a fixing hole 05 and a coaxially arranged connecting hole 06 in the middle. A rolling bearing is fixedly installed in the fixing hole 05 by an arc-fitting method. The rolling bearing is fixedly installed on the fixed shaft 01. The driven gear 02 is thereby rotatably installed on the fixed shaft 01. A spring 07 is arranged in the connecting hole 06. The spring 07 is sleeved on the fixed shaft 01. One end of the spring 07 abuts against the rolling bearing in the fixing hole 05, and the other end abuts against the driven gear 02. After the driving gear 03 stops rotating, the transmission gear 04 moves along the fixed shaft 01 toward the driving gear 03 under the action of the spring 07, thereby separating from the driven gear 02 (such as Figure 3 shown).

[0026] The rolling bearing described in the present invention is a ball bearing or a roller bearing, preferably a roller bearing.

[0027] A mounting groove 08 is provided on one side of the transmission gear 04, and the end of the spring 07 is located in the mounting groove 08. A plurality of mounting holes 09 are evenly distributed radially on the center of the transmission gear 04, and a steel ball 10 is provided in the mounting hole 09. A slide groove 11 adapted to the steel ball 10 is provided on the outer surface of the fixed shaft 01, and a plurality of transition grooves 12 adapted to the steel ball 10 are provided on one side of the slide groove 11. One end of the transition groove 12 is connected to the slide groove 11, and the other end extends toward the driving gear 03. A plurality of transition grooves 12 are spirally distributed on the outer surface of the fixed shaft 01.

[0028] When the driving gear 03 stops rotating, the steel ball 10 on the transmission gear 04 is located in the transition groove 12. When the driving gear 03 rotates, the driving gear 03 pushes the transmission gear 04 to move toward the driven gear 02, and the steel ball 10 moves from the transition groove 12 to the slide groove 11. After the transmission gear 04 and the driven gear are meshed and connected, the transmission gear 04, the driving gear 03 and the driven gear 02 rotate synchronously, and the steel ball 10 in the transmission gear 04 moves in the slide groove 11.

[0029] Because the driving gear 03 drives the transmission gear to move along the fixed shaft 01 toward the driven gear 02 during the rotation process. As a result, the transmission gear 04 will rotate at a certain angle during the movement, and the transition groove 12 is spirally distributed on the outer surface of the fixed shaft 01. Therefore, the steel ball 10 can smoothly enter the chute 11 along the transition groove 12. Similarly, when the driving gear 03 stops rotating, the transmission gear 04 moves toward the driving gear 03 under the action of the spring 07. Since the steel ball 10 needs to return to the transition groove 12 from the chute 11 again, and since the transition groove 12 is spirally evenly distributed on the fixed shaft 01, during the movement of the transmission gear 04, the transmission gear 04 will rotate in the opposite direction at a certain angle, and will also be synchronously reversed at a certain angle through the driving gear 03. Therefore, during use, a certain angle can be reversed by an external drive source. So that the steel ball 10 can smoothly enter the transition groove 12.

[0030] When assembling the steel ball 10 , after placing the steel ball 10 in the mounting hole 09 , a top screw is threadedly connected in the mounting hole 09 to prevent the steel ball 10 from falling from the mounting hole 09 during the rotation of the transmission gear 04 .

[0031] There are several plug-in slots 13 evenly distributed along the axial direction on the transmission gear 04. The plug-in slots 13 and the above-mentioned connecting holes 06 are respectively located at the two ends of the transmission gear 04. The driving gear 03 is evenly distributed with the same number of driving posts 14 as the plug-in slots 13, and the driving posts 14 are located in the plug-in slots 13. A first push surface 15 is obliquely arranged in the plug-in slot 13, and a second push surface 16 is arranged on one side of the top of the driving post 14. The first push surface 15 and the second push surface 16 abut against each other. When the driving gear 03 rotates, the first push surface 15 and the second push surface 16 cooperate. The driving transmission gear 04 moves toward the direction of the driven gear 02 and meshes with the driven gear 02 (such as Figure 1 shown).

[0032] Therefore, when the linkage mechanism is in use, in the normal state (when the driving gear 03 is rotating), the transmission gear 04 and the driven gear 02 are separated. When the driving gear 03 starts to rotate, the second push surface 16 on the driving gear 03 and the first push surface 15 on the transmission gear 04 push the transmission gear 04 to move in the direction of the driven gear 02 and mesh with the driven gear 02. During the movement of the transmission gear 04, the steel ball 10 in the transmission gear 04 enters the slide groove 11 along the transition groove 12 on the fixed shaft 01, so that the transmission gear 04 can rotate freely along the slide groove 11. Therefore, when the driving gear 03 rotates, it can drive the transmission gear 04 to rotate around the fixed shaft 01. Since the transmission gear 04 and the driven gear 02 are meshed and connected, the driven gear 02 is driven to rotate through the transmission gear 04, so that the transmission gear 04, the driven gear 02 and the driving gear 03 rotate synchronously.

[0033] When the driving gear 03 stops rotating, the transmission gear 04 moves toward the driving gear 03 under the action of the spring 07 , so that the transmission gear 04 and the driven gear 02 are separated, and the steel ball 10 in the transmission gear 04 returns from the slide groove 11 to the transition groove 12 .

[0034] See also Figure 5-6 As shown, the present invention also provides an electric glue gun, which includes a housing 17 and a glue barrel 18 installed on one side of the housing 17. A fixing seat 19 is fixedly installed in the housing 17, and the above-mentioned linkage mechanism is fixedly installed on the fixing seat 19. A push rod 20 is slidably installed on the fixing seat 19, and a rack is provided on the push rod 20. The driven gear 02 on the linkage mechanism is meshed and connected with the rack on the push rod 20. One end of the push rod 20 extends into the glue barrel 18, and the other end extends outside the housing 17. A through hole is provided on the fixing seat 19, and the push rod 20 is located in the through hole and moves.

[0035] The fixed seat 19 is also fixedly mounted with a planetary reducer 21 and a motor 22. The output end of the motor 22 is connected to the input end of the planetary reducer 21 through a synchronous belt transmission. The fixed seat 19 is provided with a through hole for the push rod 20 to move. The output end of the planetary reducer 21 is fixedly mounted with a driving gear, which is meshed and connected with the driving gear 03 on the linkage mechanism.

[0036] When the electric glue gun is in use, the purchased glue is placed in the glue barrel 18, the motor 22 is started to drive the planetary reducer 21 to rotate, and the planetary reducer 21 rotates to drive the driving gear 03 on the linkage mechanism to rotate, thereby driving the driven gear 02 to rotate through the transmission gear 04, and the driven gear 02 thereby drives the push rod 20 to move freely in the through hole of the fixed seat 19 and move in the glue barrel 18 to achieve the effect of discharging glue. When the driving source stops working, the transmission gear 04 and the driven gear 02 on the linkage mechanism are separated, and the separation gear can rotate freely on the fixed shaft 01. When the operator applies a pulling force on the push rod 20, the push rod 20 can move freely in the through hole of the fixed seat 19. This makes it easy to replace the glue in the glue barrel 18.

[0037] If the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] The above implementation modes are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A linkage mechanism comprising a fixed shaft, characterized in that: A driven gear and a driving gear are rotatably mounted on the fixed shaft, and a transmission gear is provided between the driving gear and the driven gear; the driving gear is meshed with the transmission gear; Under normal conditions, the transmission gear and the driven gear are separated. When the driving gear rotates, the driving transmission gear moves toward the driven gear and meshes with the driven gear.

2. The linkage mechanism according to claim 1, characterized in that: The driven gear includes a fixing hole and a coaxially arranged connecting hole in the middle, a rolling bearing is fixedly installed in the fixing hole, and the rolling bearing is fixedly installed on the fixed shaft; a spring is provided in the connecting hole, and the spring is sleeved on the fixed shaft, one end of the spring abuts against the rolling bearing in the fixing hole, and the other end abuts against the driven gear.

3. The linkage mechanism according to claim 2, characterized in that: A mounting groove is provided on one side of the transmission gear, and the end of the spring is located in the mounting groove.

4. The linkage mechanism according to claim 3, characterized in that: There are multiple mounting holes evenly distributed radially along the center of the transmission gear, and steel balls are set in the mounting holes. A slide groove adapted to the steel balls is provided on the outer surface of the fixed shaft, and a plurality of transition grooves adapted to the steel balls are provided on one side of the slide groove; one end of the transition groove is connected to the slide groove, and the other end extends toward the driving gear. Several transition grooves are spirally distributed on the outer surface of the fixed shaft.

5. The linkage mechanism according to claim 4, characterized in that: A plurality of plug-in slots are evenly distributed along the axial direction on the transmission gear, and the same number of driving columns as the plug-in slots are evenly distributed on the driving gear, and the driving columns are located in the plug-in slots; a first push surface is obliquely arranged in the plug-in slot, and a second push surface is arranged on one side of the top of the driving column; the first push surface and the second push surface are in abutment with each other.

6. An electric glue gun, characterized by: It comprises the linkage mechanism described in any one of claims 1-5.

7. The electric glue gun according to claim 6, characterized in that: It includes a shell and a glue barrel installed on one side of the shell; a fixed seat is fixedly installed in the shell, and the above-mentioned linkage mechanism is fixedly installed on the fixed seat; a push rod is slidably installed on the fixed seat, and the linkage mechanism is engaged with the rack on the push rod; one end of the push rod extends into the glue barrel, and the other end extends outside the shell.

8. The electric glue gun according to claim 7, characterized in that: The push rod is provided with a rack, and the driven gear on the linkage mechanism is meshed and connected with the rack on the push rod; the fixed seat is provided with a through hole, and the push rod is located in the through hole and moves.

9. The electric glue gun according to claim 8, characterized in that: A planetary reducer and a motor are also fixedly mounted on the fixed seat, and the output end of the motor and the input end of the planetary reducer are connected through a synchronous belt transmission; a through hole for the push rod to move is provided on the fixed seat, and a driving gear is fixedly mounted on the output end of the planetary reducer, and the driving gear is meshed with the active gear on the linkage mechanism.

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