Transmission mechanism of a rodless glue gun

Abstract

The application discloses a transmission mechanism of a rodless glue gun, which comprises a telescopic device, a power device and a push disc device, wherein the telescopic device is an X-shaped connecting rod structure, the rear end of the X-shaped connecting rod structure is provided with a rear connecting point, the rear connecting point is connected to a fixed seat, the front end of the X-shaped connecting rod structure is provided with a front connecting point, and the front connecting point is connected to the push disc device; the telescopic device is provided with a power connecting point close to the rear end position, the power device acts on the power connecting point and is used for driving the telescopic device to move. According to the principle of telescopic multiplication of the X-shaped connecting rod mechanism, the linear stroke multiplication of the front end of the X-shaped connecting rod structure in a specified proportion can be realized through a small stroke of the power device, the effect that the glue gun is externally provided with no push rod is realized, and the interference between the glue gun and the body or surrounding objects is avoided.

Description

Technical Field

[0001] This invention relates to the field of glue gun technology, and in particular to a transmission mechanism for a rodless glue gun. Background Technology

[0002] In interior grout sealing and caulking, as well as exterior curtain wall and window caulking, a caulking gun is used to squeeze out sealant and apply it to gaps or work surfaces. Currently, there are many models of caulking guns on the market, both manual and electric, but they all have a push rod slightly longer than the internal sealant to squeeze out the sealant. During use, this push rod is completely outside the caulking gun. For example, the caulking gun and its transmission device disclosed in CN107282378B, and the electric caulking gun and rack and pinion drive device disclosed in CN116174264A, are both examples of this structure.

[0003] The presence of the external push rod on the glue gun often causes interference with the body or surrounding objects during operation, reducing construction efficiency and increasing construction difficulty. Summary of the Invention

[0004] In order to solve the problems in the prior art, the present invention provides a transmission mechanism for a rodless glue gun.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A transmission mechanism for a rodless glue gun includes a telescopic device, a power unit, and a pusher device, wherein: The telescopic device is an X-type linkage structure. The rear end of the X-type linkage structure has a rear connection point, which is connected to the fixed base. The front end of the X-type linkage structure has a front connection point, which is connected to the push plate device. The X-link structure has a power connection point near the rear end. The power unit acts on the power connection point to drive the movement of the X-link structure.

[0006] Furthermore, the power unit includes a rack, a gear, and a power unit; The rack and the X-shaped connecting rod structure are arranged in parallel, and a rack retaining sleeve is provided to cooperate with the rack, so that the rack can move linearly back and forth under the guidance of the rack retaining sleeve; the rack is connected to the power connection point of the telescopic device through the connecting column; The gear meshes with the rack and pinion, and is also connected to the power unit for transmission.

[0007] Furthermore, the power unit includes a ball screw, a ball nut, and a power unit; The ball screw and the X-type connecting rod structure are arranged in parallel, and the ball screw is equipped with a matching ball nut; a guide rail is arranged parallel to the ball screw, and a connecting frame is provided on the ball nut. The connecting frame and the guide rail are slidably engaged, so that the ball nut can move linearly back and forth on the ball screw under the guidance of the guide rail; the ball nut / connecting frame is connected to the power connection point of the telescopic device through a connecting column. The power unit is connected to the ball screw drive.

[0008] Furthermore, the power unit includes a power section and a clutch.

[0009] Furthermore, the clutch includes a central shaft, an input gear, a clutch groove, and a clutch shaft arranged coaxially; The central shaft is divided into the following sections along the axial direction: output shaft section, input gear mounting shaft section, clutch groove mounting shaft section, and clutch shaft mounting shaft section. These sections are integrally connected. The output shaft section is used for transmission connection with the driven component; The input gear mounting shaft is a round shaft section, and the input gear is sleeved on the input gear mounting shaft section and rotates with it; the input gear is connected to the power unit for transmission. The clutch groove mounting shaft section is a limiting shaft section. The clutch groove is sleeved on the clutch groove mounting shaft section, and the two achieve axial sliding and circumferential limiting fit, so that the clutch groove rotates with the clutch groove mounting shaft section and can move axially on the clutch groove mounting shaft section. The clutch shaft mounting section is a round shaft section. The clutch shaft is sleeved on the clutch shaft mounting section and rotates with it, while the clutch shaft remains stationary in the axial position. The clutch groove body has an axially extending positioning shaft fixed at one end facing the input gear. The input gear has multiple positioning grooves evenly distributed in a circle at one end facing the clutch groove body. The positioning shaft is inserted into or separated from the positioning grooves. The clutch groove body is provided with one or more herringbone grooves along the circumference. The middle position of the herringbone groove points to the clutch shaft, and the two ends of the herringbone groove point to the input gear. The clutch shaft is concentric with the clutch groove body at one end. The clutch shaft is provided with a radially protruding shaft corresponding to the herringbone groove, and the protruding shaft extends into the herringbone groove. A compression spring is also provided in conjunction with the clutch groove. The compression spring is sleeved on the central shaft. One end of the compression spring abuts against the clutch groove, and the other end of the compression spring points towards the clutch shaft. The other end of the compression spring abuts against the positioning part provided on the central shaft.

[0010] Furthermore, the limiting shaft section is a square shaft structure or a round shaft structure with a notch in the axial direction, and the inner ring of the clutch groove is a square hole structure or a circular structure with a notch, so as to cooperate with the limiting shaft section.

[0011] Furthermore, a linear bearing is installed between the clutch groove and the clutch groove mounting shaft section.

[0012] Furthermore, the pusher device includes a pusher, a pusher base, a pusher rotation shaft, and a pusher retainer arranged coaxially; One end of the push plate base is fixedly provided with a fixed shaft extending towards one side of the push plate, and the push plate is mounted on the fixed shaft; The other end of the push plate base is provided with a mounting groove at the center. One end of the push plate rotation shaft is rotatably connected to the mounting groove, and the other end of the push plate rotation shaft is provided with a connecting seat, which is connected to the front connection point of the X-type linkage structure through the connecting seat. One or more push plate holders are spaced apart along the axial direction on the push plate base. Multiple rollers are distributed circumferentially on the outer periphery of the push plate holders, and the rollers travel in the front-to-back direction.

[0013] Furthermore, the rollers of the multiple push plate holders are arranged in an alternating manner.

[0014] Furthermore, the connecting seat is provided with a connecting hole, and the front connection point of the X-shaped connecting rod structure is connected to the connecting hole on the connecting seat by a bolt passing through it.

[0015] The beneficial effects of this invention are: (1) In this invention, the telescopic device is an X-type linkage structure, and a power connection point is provided near the rear end of the telescopic device. It utilizes the principle of telescopic multiplication of the X-type linkage mechanism. The power device acts on the power connection point, and the specified proportion of linear stroke multiplication of the front end of the X-type linkage structure can be achieved through the small stroke of the power device, thereby achieving the effect of no push rod outside the glue gun and avoiding interference between the glue gun and the body or surrounding objects.

[0016] (2) The push plate device of the present invention includes a push plate, a push plate base and a push plate retainer. The push plate retainer effectively enhances the rigidity of the telescopic device, and the push plate connected to it can rotate freely. Together, they can prevent the telescopic device from collapsing excessively and torsional deformation.

[0017] (3) The power device of the present invention has a clutch, which has a compact and simple structure, seamlessly connects manual and power modes, and does not distinguish between forward and reverse. It is simple to operate and highly efficient, and can play an important role in stroke limit, waste rubber ejection, refilling and pullback. Attached Figure Description

[0018] Figure 1 This is one of the three-dimensional schematic diagrams of Embodiment 1 of the present invention in a retracted state; Figure 2 This is a second perspective view of Embodiment 1 of the present invention in a retracted state; Figure 3 This is a three-dimensional schematic diagram of Embodiment 1 of the present invention in its extended state; Figure 4 This is a front view of Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the fixing base in Embodiment 1 of the present invention; Figure 6 This is a three-dimensional schematic diagram of the pusher device in Embodiment 1 of the present invention; Figure 7 This is a front view of the pusher device in Embodiment 1 of the present invention; Figure 8 for Figure 7 AA section view in the middle; Figure 9 This is a schematic diagram of the cage in Embodiment 1 of the present invention; Figure 10 This is a schematic diagram of the clutch in the engaged state in Embodiment 1 of the present invention; Figure 11 for Figure 10 The main view; Figure 12 for Figure 11 BB section view in the middle; Figure 13 This is a schematic diagram of the input gear in a clutch; Figure 14 This is a schematic diagram of the clutch groove in a clutch. Figure 15 for Figure 14 The left view; Figure 16 for Figure 14 The main view; Figure 17 for Figure 16 CC section view in the middle; Figure 18 This is a schematic diagram of the clutch shaft in a clutch. Figure 19 for Figure 18 DD section view in the middle; Figure 20 A three-dimensional schematic diagram of the central shaft of the clutch; Figure 21 This is a front view of the clutch's center shaft; Figure 22 for Figure 21 EE section view; Figure 23 This is a schematic diagram of the clutch being in the disengaged state in Embodiment 1 of the present invention; Figure 24 for Figure 23 The main view; Figure 25 for Figure 23 The right view; Figure 26 for Figure 25 FF section view; Figure 27 This is one of the three-dimensional schematic diagrams of Embodiment 2 of the present invention in a retracted state; Figure 28 This is a second perspective view of Embodiment 2 of the present invention in a retracted state; Figure 29 This is a three-dimensional schematic diagram of Embodiment 1 of the present invention in its extended state; Figure 30 This is a front view of Embodiment 2 of the present invention; Figure 31 This is a schematic diagram of the clutch in the engaged state in Embodiment 2 of the present invention; Figure 32 This is a schematic diagram of the clutch in the disengaged state in Embodiment 2 of the present invention; Figure 33 This is a schematic diagram of the central shaft of the clutch in Embodiment 2 of the present invention.

[0019] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0021] Example 1: like Figures 1 to 26 As shown, this embodiment provides a transmission mechanism for a rodless glue gun, including a telescopic device 1, a power device 2, and a pusher device 3.

[0022] The telescopic device 1 is an X-type linkage structure. Taking the telescopic direction of the X-type linkage structure as the front-to-back direction, the rear end of the X-type linkage structure has a rear connection point, which is bolted to the fixed seat 4 (the fixed seat 4 remains stationary). The front end of the X-type linkage structure has a front connection point, which is connected to the push plate device 3.

[0023] The X-shaped linkage structure has a power connection point near the rear end. The power unit 2 acts on the power connection point to drive the telescopic device to move.

[0024] This invention utilizes the principle of telescopic multiplication of the X-type linkage structure. It can achieve a linear multiplication of the front end of the X-type linkage structure by a specified ratio through a small stroke of the power device, thereby achieving the effect of no push rod outside the glue gun and avoiding interference between the glue gun and the body or surrounding objects.

[0025] In this embodiment, the pusher device 3 includes a pusher 31, a pusher rotating shaft 32, a pusher seat 33, and a pusher retainer 34, all coaxially arranged. One end of the pusher seat 33 is fixedly provided with a fixed shaft extending towards the pusher side, and the pusher 31 is fixedly mounted on the fixed shaft by a nut. The other end of the pusher seat 33 has a mounting groove at its center. One end of the pusher rotating shaft 32 is rotatably connected to the mounting groove, and the other end of the pusher rotating shaft 32 has a connecting seat 35 with a connecting hole. The front connection point of the X-shaped linkage structure is connected to the connecting hole on the connecting seat 35 by a through bolt.

[0026] In order to achieve the rotational connection between the push plate rotating shaft 32 and the mounting groove on the push plate seat 33, a deep groove ball bearing 36 is provided between the outer periphery of the push plate rotating shaft 32 and the push plate seat 33, and a thrust bearing 37 is provided between the end of the push plate rotating shaft 32 and the push plate seat 33.

[0027] Two push plate holders 34 are fixedly installed on the push plate base 33 at axial intervals. Three rollers 341 are circumferentially distributed on the outer periphery of the push plate holders 34, and the rollers 341 travel in the front-back direction. At the same time, the rollers of the two push plate holders 34 are staggered.

[0028] In this embodiment, the power unit 2 adopts a gear and rack scheme, including rack 21, gear 22 and power unit.

[0029] The rack 21 is arranged parallel to the X-shaped connecting rod structure, and a rack retaining sleeve 23 is provided to cooperate with the rack 21, so that the rack 21 can move linearly back and forth under the guidance of the rack retaining sleeve 23; the rack 21 is connected to the power connection point of the telescopic device through the connecting column 24. The gear 22 meshes with the rack 21, and the gear 22 is also connected to the power unit for transmission.

[0030] In this embodiment, the fixing base 4 is also provided with a notch to avoid the rack 21.

[0031] Specifically, the power unit includes a power section and a clutch 10. The power section is existing technology and can employ a motor or a motor with a speed reducer.

[0032] The clutch 10 includes a central shaft 11, an input gear 12, a clutch groove 13, and a clutch shaft 14; The central shaft 11 is sequentially divided along the axial direction into an output shaft section 101, an input gear mounting shaft section 102, a clutch groove mounting shaft section 103, and a clutch shaft mounting shaft section 104. The output shaft section 101, input gear mounting shaft section 102, clutch groove mounting shaft section 103, and clutch shaft mounting shaft section 104 are integrally connected. The output shaft section 101 is used for transmission connection with the gear 22.

[0033] The input gear mounting shaft section 102 is a round shaft section, and the input gear 12 is sleeved on the input gear mounting shaft section 102 and rotates with it; the input gear 12 is connected to the power part for transmission.

[0034] The clutch groove mounting shaft section 103 is a limiting shaft section, which is a circular shaft structure with a notch surface in the axial direction (the limiting shaft section can also be a square shaft structure). The inner ring of the clutch groove 13 is a circular structure with a notch (or a square hole structure) that mates with the limiting shaft section 103. The clutch groove 13 is sleeved on the clutch groove mounting shaft section 103, and the two achieve axial sliding and circumferential limiting fit, so that the clutch groove 13 rotates with the clutch groove mounting shaft section 103 and can move axially on the clutch groove mounting shaft section 103.

[0035] To ensure the axial movement of the clutch groove 13 and the clutch groove mounting shaft section 103, a linear bearing 15 is installed between the clutch groove 13 and the clutch groove mounting shaft section 103.

[0036] The clutch shaft mounting section 104 is a round shaft section. The clutch shaft 14 is sleeved on the clutch shaft mounting section 104 and rotates with it through the positioning bearing 141. The clutch shaft 14 remains stationary in the axial direction. During installation, the inner ring of the positioning bearing 141 is fixedly connected to the clutch shaft mounting section 104, and the outer ring of the positioning bearing 141 is fixedly connected to the clutch shaft.

[0037] To further ensure that the clutch shaft 14 remains stationary in the axial direction, a mounting bearing 142 is provided at the outer shoulder of the clutch shaft 14, and the outer ring of the mounting bearing 142 is connected to the housing.

[0038] The clutch groove 13 is fixed with an axially extending positioning shaft 16 at one end facing the input gear 12. Three positioning shafts 16 are distributed circumferentially. The input gear 12 is provided with a plurality of positioning grooves 17 evenly distributed circumferentially at one end facing the clutch groove 13. The positioning shaft 16 is engaged or disengaged from the positioning grooves 17.

[0039] The clutch groove body 13 has two herringbone grooves 18 along its circumferential direction. The middle position of the herringbone groove 18 points to the clutch shaft 14, and the two ends of the herringbone groove point to the input gear 12.

[0040] The end of the clutch shaft 14 near the clutch groove 13 is concentric with the clutch groove. In this embodiment, the outer diameter of the clutch shaft 14 is smaller than the inner diameter of the clutch groove 13, so that the end of the clutch shaft 14 near the clutch groove extends into the clutch groove 13.

[0041] The clutch shaft 14 is provided with a radially extending convex shaft 19 corresponding to the herringbone groove 18, and the convex shaft 19 extends into the herringbone groove 18. A pulley may also be provided on the convex shaft 19, and the pulley rolls in contact with the side wall of the herringbone groove 18.

[0042] A compression spring 20 is also provided in conjunction with the clutch groove 13. The compression spring 20 is sleeved on the clutch groove mounting shaft section 103. One end of the compression spring 20 abuts against the clutch groove 13, and the other end of the compression spring 20 points towards the clutch shaft. The other end of the compression spring 20 abuts against the positioning part provided on the central shaft. In this embodiment, the inner ring of the positioning bearing 141 serves as the positioning part, and the other end of the compression spring 20 abuts against the inner ring of the positioning bearing 141.

[0043] For ease of installation, washers 201 are provided between the compression spring 20 and the clutch groove 13, and between the compression spring 20 and the inner ring of the positioning bearing 141.

[0044] The aforementioned clutch has a compact and simple structure, seamlessly connecting clutch and manual operation, and does not distinguish between forward and reverse rotation. It is simple to operate and highly efficient, and can play an important role in stroke limit, waste rubber ejection, refilling and pullback.

[0045] The working principle of the clutch is as follows: When no external force is applied to the clutch shaft 14, the clutch is engaged, meaning the positioning shaft 16 on the clutch groove 13 is inserted into the positioning groove 17 on the input gear 12. At this time, the clutch groove 13 and the input gear 12 are circumferentially fixed and do not rotate relative to each other. The input gear 12 drives the clutch groove 13 to rotate, which in turn drives the central shaft 11 to rotate. Simultaneously, the clutch groove 13 drives the clutch shaft 14 to rotate via the cam shaft 19. At this time, under the action of the compression spring 20, the cam shaft 19 is located in the middle position of the herringbone groove 18.

[0046] Once the clutch shaft 14 is subjected to external force, as long as the clutch shaft 14 rotates relative to the central shaft 11 (regardless of forward or reverse rotation), the clutch groove 13 will separate from the input gear 12, and then enter the manual mode. Continuing to rotate the clutch shaft 14 will manually drive the rotation of the central shaft 11. Releasing the clutch shaft 14 will automatically restore the engagement state. It can achieve a seamless connection between power and manual operation, which is simple to operate and highly efficient.

[0047] The clutch operation process is as follows: (1) When the clutch shaft 14 is engaged and the power is running, when a load is applied to the clutch shaft 14 by hand (such as holding the handwheel fixed to the outer end of the clutch shaft 14), the central shaft 11 will drive the clutch groove 13 to climb along the convex shaft of the clutch shaft 14, thereby causing the clutch groove 13 to disengage from the input gear 12 (the positioning shaft 16 and the positioning groove 17 separate). The input gear 12 will rotate freely relative to the central shaft, thus disengaging the clutch. Note that this process can be triggered regardless of whether it is forward or reverse. Next, there are several scenarios: First, if the clutch shaft 14 handwheel is released, the clutch groove 13 will tend to engage with the input gear 12 under the action of the spring. It may engage directly, or the three protruding positioning shafts 16 of the clutch groove 13 may press against the end face of the input gear 12. However, if the input gear 12 continues to rotate, it can engage smoothly and return to the power mode. Second, if the clutch shaft 14 is rotated in the opposite direction, it can enter the manual mode to drive the load. Third, if the clutch shaft 14 is rotated in the original direction, it returns to the first scenario, but this time there is not only compression of the spring 20 but also manual force. This mode is a very basic mode and is generally not used. However, this mode shows that even when the power is running, the clutch can be intervened to disconnect the power without causing any harm. (2) In the engaged state, when the power is not running (i.e., the input gear 12 does not rotate), when a load is manually applied to the clutch shaft 14 (such as rotating the handwheel fixed to the outer end of the clutch shaft 14), the clutch shaft 14 will drive the clutch groove 13 to climb, thereby causing the clutch groove 13 to disengage from the input gear 12. The input gear 12 will then rotate freely relative to the central shaft 11. At this time, the clutch disengagement is achieved. It should be noted that this process can be triggered regardless of whether it is forward or reverse. Next, there are several cases. First, if the clutch shaft 14 is moved along... If the handwheel continues to rotate in the original direction, it can enter manual mode to drive the load. Once the load on the handwheel is stopped, the clutch groove 13 tends to engage with the input gear 12 under the action of the compression spring 20. It may engage directly, or the three protruding shafts of the clutch groove 13 may press against the end face of the input gear 12. However, when the input gear 12 continues to rotate, it can engage smoothly. Secondly, if the clutch shaft 14 handwheel is released, the clutch groove 13 tends to engage with the input gear 12 under the action of the compression spring. There are two possible scenarios: First, the clutch may engage directly, or the three protruding shafts of the clutch groove 13 may be positioned on the end face of the input gear 12. However, if the input gear 12 rotates, the clutch can engage smoothly. Second, if the clutch shaft 14 is rotated in the opposite direction, the clutch groove 13 will tend to engage with the input gear 12 under the action of the compression spring and the handwheel. In this case, there are two possibilities: one is that the clutch may engage directly, and then continuing to rotate the clutch shaft 14 will disengage the clutch groove 13, thus achieving manual mode in the opposite direction. The other possibility is that the three protruding shafts of the clutch groove 13 are positioned on the end face of the input gear 12. In this case, the input gear 12 does not rotate, so as the clutch shaft 14, driven by the hand, continues to rotate, the clutch groove 13 will eventually engage with the input gear 12. Before engagement, it is already in manual mode and can drive the load to rotate. Once engagement is complete, continuing to rotate the clutch shaft 14 will disengage the clutch groove 13, thus achieving manual mode.

[0048] This mode is a standard mode that allows for seamless switching between automatic and manual operation, and it does not distinguish between forward and reverse rotation.

[0049] Example 2: like Figures 27 to 33 As shown, the difference between this embodiment and Embodiment 1 lies in the different power device scheme. In this embodiment, the power device adopts a ball screw nut scheme.

[0050] Specifically, the power unit includes a ball screw 41, a ball nut 42, and a power unit.

[0051] The ball screw 41 is arranged parallel to the X-type connecting rod structure, and a matching ball nut 42 is provided on the ball screw 41; a guide shaft 43 is arranged parallel to the ball screw 41, and a connecting frame 44 is fixedly provided on the ball nut 42. The connecting frame 44 is slidably engaged with the guide shaft 43, so that the ball nut 42 can reciprocate linearly on the ball screw 41 under the guidance of the guide shaft 43; the connecting frame 44 is connected to the power connection point of the X-type connecting rod structure through a connecting column 45.

[0052] The power unit has the same structure as in Embodiment 1. In the power unit, the output shaft section 101 of the clutch is not connected to the gear, but is connected to the ball screw 41 through the coupling 46.

[0053] The above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention without departing from the spirit and scope of the present invention. Any modifications or partial substitutions should be covered within the scope of the claims of the present invention.

[0054] If the terms "first" or "second" are used in this document to define components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing the invention and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0055] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 invention.

[0056] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A transmission mechanism for a rodless glue gun, characterized in that: It includes a telescopic device, a power unit, and a pusher device, wherein: The telescopic device is an X-type linkage structure. The rear end of the X-type linkage structure has a rear connection point, which is connected to the fixed base. The front end of the X-type linkage structure has a front connection point, which is connected to the push plate device. The X-link structure has a power connection point near the rear end. The power device acts on the power connection point to drive the movement of the X-link structure. The power unit adopts either power unit scheme one or power unit scheme two; In the first power unit scheme, the power unit includes a rack, a gear, and a power unit; The rack and the X-shaped connecting rod structure are arranged in parallel, and a rack retaining sleeve is provided to cooperate with the rack, so that the rack can move linearly back and forth under the guidance of the rack retaining sleeve; the rack is connected to the power connection point of the telescopic device through the connecting column; The gear meshes with the rack and pinion, and is also connected to the power unit for transmission. In the second power unit scheme, the power unit includes a ball screw, a ball nut, and a power unit; The ball screw and the X-type connecting rod structure are arranged in parallel, and the ball screw is equipped with a matching ball nut; a guide rail is arranged parallel to the ball screw, and a connecting frame is provided on the ball nut. The connecting frame and the guide rail are slidably engaged, so that the ball nut can move linearly back and forth on the ball screw under the guidance of the guide rail; the connecting frame is connected to the power connection point of the telescopic device through a connecting column. The power unit is connected to the ball screw drive; The power unit includes a power section and a clutch; The clutch includes a central shaft, an input gear, a clutch groove, and a clutch shaft arranged coaxially; The central shaft is divided into the following sections along the axial direction: output shaft section, input gear mounting shaft section, clutch groove mounting shaft section, and clutch shaft mounting shaft section. These sections are integrally connected. The output shaft section is used for transmission connection with the driven component; The input gear mounting shaft is a round shaft section, and the input gear is sleeved on the input gear mounting shaft section and rotates with it; the input gear is connected to the power unit for transmission. The clutch groove mounting shaft section is a limiting shaft section. The clutch groove is sleeved on the clutch groove mounting shaft section, and the two achieve axial sliding and circumferential limiting fit, so that the clutch groove rotates with the clutch groove mounting shaft section and can move axially on the clutch groove mounting shaft section. The clutch shaft mounting section is a round shaft section. The clutch shaft is sleeved on the clutch shaft mounting section and rotates with it, while the clutch shaft remains stationary in the axial position. The clutch groove body has an axially extending positioning shaft fixed at one end facing the input gear. The input gear has multiple positioning grooves evenly distributed in a circle at one end facing the clutch groove body. The positioning shaft is inserted into or separated from the positioning grooves. The clutch groove body is provided with one or more herringbone grooves along the circumference. The middle position of the herringbone groove points to the clutch shaft, and the two ends of the herringbone groove point to the input gear. The clutch shaft is concentric with the clutch groove body at one end. The clutch shaft is provided with a radially protruding shaft corresponding to the herringbone groove, and the protruding shaft extends into the herringbone groove. A compression spring is also provided in conjunction with the clutch groove. The compression spring is sleeved on the central shaft. One end of the compression spring abuts against the clutch groove, and the other end of the compression spring points towards the clutch shaft. The other end of the compression spring abuts against the positioning part provided on the central shaft.

2. The transmission mechanism of the rodless glue gun according to claim 1, characterized in that: The limiting shaft section is a square shaft structure or a round shaft structure with a notch in the axial direction, and the inner ring of the clutch groove is a square hole structure or a circular structure with a notch, so as to cooperate with the limiting shaft section.

3. The transmission mechanism of the rodless glue gun according to claim 1 or 2, characterized in that: A linear bearing is installed between the clutch groove and the clutch groove mounting shaft section.

4. The transmission mechanism of the rodless glue gun according to claim 1, characterized in that: The pusher device includes a pusher, a pusher base, a pusher rotating shaft, and a pusher retainer arranged coaxially. One end of the push plate base is fixedly provided with a fixed shaft extending towards one side of the push plate, and the push plate is mounted on the fixed shaft; The other end of the push plate base is provided with a mounting groove at the center. One end of the push plate rotation shaft is rotatably connected to the mounting groove, and the other end of the push plate rotation shaft is provided with a connecting seat, which is connected to the front connection point of the X-type linkage structure through the connecting seat. One or more push plate holders are spaced apart along the axial direction on the push plate base. Multiple rollers are distributed circumferentially on the outer periphery of the push plate holders, and the rollers travel in the front-to-back direction.

5. The transmission mechanism of the rodless glue gun according to claim 4, characterized in that: The rollers of the multiple push plate holders are arranged in an alternating pattern.

6. The transmission mechanism of the rodless glue gun according to claim 4, characterized in that: The connecting seat is provided with a connecting hole, and the front connection point of the X-shaped connecting rod structure is connected to the connecting hole on the connecting seat by a bolt passing through it.

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