Manual caulking gun

Abstract

The present invention provides a manual glue gun, which relates to the technical field of glue guns, and includes: a cylinder and a glue barrel, wherein the outer circumference of the front end of the cylinder is welded with four arc-shaped retaining plates that are longitudinally supported, and the four arc-shaped retaining plates are longitudinally supported, and a cylindrical placement space for inserting the glue barrel is formed between them; the front end part of the bottom arc-shaped retaining plate is swingably installed with a circular plugging cover plate, and the circular plugging cover plate is in contact with the front ends of the four arc-shaped retaining plates when it is swingably placed in an upright state; the front end parts of the four arc-shaped retaining plates are jointly slidably sleeved with positioning rings through spring pushing. When the driving ring slides toward or away from the positioning ring, it can sequentially drive the circular plugging cover plate and the positioning ring to perform up and down swinging opening and closing and reciprocating sliding actions, and complete the loosening and tightening operations of the glue barrel and the circular plugging cover plate at one time. Compared with the prior art, it saves the time before and after each replacement and disassembly of the glue barrel, and the operation is convenient and time-saving, which helps to improve the efficiency of disassembly and replacement of the glue barrel.

Description

Technical Field

[0001] The invention relates to the technical field of glue guns, in particular to a manual caulking gun. Background Art

[0002] Manual caulking gun is a commonly used tool for manually applying pressure to squeeze the glue out of the glue barrel. This tool is usually used in home repairs, decoration, industrial production and various occasions that require bonding.

[0003] The existing glue guns are equipped with an enclosing and limiting mechanism for fixing and limiting the glue cartridge thereon. The head ends of these mechanisms are equipped with an blocking and positioning structure for blocking and positioning the glue cartridge therein, and the enclosing and limiting mechanism or the blocking and positioning structure is equipped with a limiting and fixing structure for positioning the blocking and positioning structure. However, there is often a lack of a disposable driving mechanism that can transmit a loosening and tightening driving force between the blocking and positioning structure and the limiting and fixing structure. As a result, before and after each replacement and disassembly of the glue cartridge, the blocking and positioning structure and the limiting and fixing structure need to be driven step by step in sequence to loosen and tighten the glue cartridge and the enclosing and positioning structure respectively. This is relatively cumbersome and inconvenient to operate, which reduces the efficiency of disassembly and replacement of the glue cartridge and indirectly reduces the glue gun's gluing efficiency. Summary of the invention

[0004] In view of this, the present invention provides a manual glue gun to solve the problem that before and after each replacement and disassembly of the glue cylinder, it is necessary to drive the blocking positioning structure and the limiting fixing structure step by step to tighten the glue cylinder and the blocking positioning structure, which makes the operation more cumbersome and inconvenient.

[0005] The technical solution proposed by the present invention is: a manual caulking gun, specifically comprising: a cylinder and a rubber cartridge, wherein four arc-shaped retaining plates for longitudinal support are welded around the circumference of the front end of the cylinder, the four arc-shaped retaining plates are longitudinally supported, and a cylindrical placement space for inserting the rubber cartridge is formed between the four arc-shaped retaining plates;

[0006] A circular plugging cover plate is swiveled and installed at the head end of the arc-shaped retaining plate at the bottom side. When the circular plugging cover plate is swiveled and placed in an upright state, it abuts against the head ends of the four arc-shaped retaining plates to block and limit the rubber cylinder in the cylindrical placement space;

[0007] The head end parts of the arc-shaped retaining plates at four locations are pushed by springs and slidably mounted with positioning rings, and the parts of the arc-shaped retaining plates deviating from the middle are slidably mounted with driving rings at four locations, and positioning bolts are screwed and installed through the circumferential side walls of the driving rings;

[0008] A swing drive assembly for driving the circular blocking cover plate to swing up and down is arranged between the circular blocking cover plate and the driving ring. When the driving ring slides toward the positioning ring, the swing drive assembly first drives the circular blocking cover plate to swing to an upright posture for blocking and limiting the rubber cylinder. After the circular blocking cover plate is driven to the upright posture, the driving ring can continue to slide and abut against the positioning ring, and push the positioning ring to slide onto the circular blocking cover plate in the upright posture to position the circular blocking cover plate.

[0009] Furthermore, the swing drive assembly as a whole is composed of a transmission spring, a U-shaped slider, a drive block, a swing rod and a pull rod.

[0010] Furthermore, the swing rod is welded and fixed to the circumferential outer edge of the circular plugging cover plate, the swing rod is parallel to the circular plugging cover plate and protrudes from the circumferential outer edge of the circular plugging cover plate;

[0011] Two L-shaped mounting rods are symmetrically welded to the bottom side of the head end of the arc-shaped retaining plate on the bottom side, a centering shaft is welded between the head ends of the two L-shaped mounting rods, and the middle part of the swing arm is rotatably matched with the centering shaft.

[0012] Furthermore, a longitudinal installation groove is formed through the head end of the arc-shaped retaining plate on the bottom side, and the hexagonal longitudinal support shaft is welded inside the longitudinal installation groove;

[0013] The U-shaped slider is slidably mounted on the hexagonal longitudinal support shaft, the pull rod is rotatably connected between the U-shaped slider and the tail end of the swing rod, and the driving block is slidably mounted on the part of the hexagonal longitudinal support shaft away from the L-shaped mounting rod;

[0014] The transmission spring is sleeved on the portion of the hexagonal longitudinal support shaft located between the U-shaped sliding block and the driving block.

[0015] Furthermore, three limiting strip frames are arranged around the side of the positioning ring facing the driving ring, and the limiting strip frames are longitudinally supported and have longitudinal positioning rods welded inside;

[0016] Three positioning blocks are welded on the three upper arc-shaped retaining plates near the positioning rings, and the three limit strips are slidably inserted into and matched with the three limit strips, and the three longitudinal positioning rods are pushed by springs and slide through and match the three positioning blocks.

[0017] Furthermore, the lower half of the driving block protrudes from the longitudinal mounting groove, and the driving ring sequentially abuts against the lower half of the driving block and three limiting strip frames when sliding toward the positioning ring.

[0018] Furthermore, four longitudinal support positioning shafts are slidably installed on the four arc-shaped retaining plates, and a surrounding limiting space for centering the rubber cylinder in the cylindrical placement space is formed between the four longitudinal support positioning shafts, and the surrounding limiting space has a cylindrical structure.

[0019] Furthermore, a U-shaped sliding frame is welded to the middle section of the longitudinal support positioning shaft, and the four U-shaped sliding frames are correspondingly penetrated and slidably matched with the middle parts of the four arc-shaped retaining plates;

[0020] The tail end parts of the arc-shaped retaining plates at four locations are all provided with external threads, and the external thread sections of the arc-shaped retaining plates at four locations are screwed together to be fitted with a threaded driving ring, and an annular track groove is provided on the outer side of one end of the threaded driving ring close to the U-shaped sliding frame, and a transmission ring is rotatably installed in the annular track groove;

[0021] Four U-shaped transmission frames are welded around the circumference outer ring of the transmission ring, and four sets of connecting rods are rotatably connected between the four U-shaped transmission frames and the four U-shaped sliding frames.

[0022] Furthermore, a tilted handle is fixedly installed on the bottom side of the head end of the cylinder, an air intake pipe is fixedly connected to the bottom end of the handle, an air pressure regulating valve is installed on the top end of the air intake pipe, and a trigger is rotatably installed on the top end of the handle;

[0023] A through hole is formed in the center of the circular plugging cover plate, and a conical glue outlet pipe is screwed and connected to the glue outlet nozzle at the head end of the glue cylinder. The conical glue outlet pipe passes through the through hole and is screwed and assembled with the glue outlet nozzle of the glue cylinder.

[0024] The manual caulking gun provided by the present invention has the following beneficial effects:

[0025] 1. Through the power transmission of the transmission spring, the drive block and the three limit strips and the use of the rebound pushing function of the composite transmission spring and the springs on the three longitudinal positioning rods, when the driving circle slides toward or away from the positioning circle, it can drive the circular plugging cover plate and the positioning circle in turn to perform up and down swinging, opening and closing and reciprocating sliding actions, and complete the loosening and tightening operations of the rubber cylinder and the circular plugging cover plate at one time. Compared with the existing technology that lacks a one-time driving mechanism between the circular plugging cover plate and the positioning circle, it saves the trouble of driving the circular plugging cover plate and the positioning circle in steps to loosen and tighten the rubber cylinder and the circular plugging cover plate respectively before and after each replacement and disassembly of the rubber cylinder. The operation is convenient and time-saving, which helps to improve the efficiency of disassembly and replacement of the rubber cylinder and indirectly improves the efficiency of glue gun glue application.

[0026] Second, the transmission spring can provide the required sliding stroke for the driving ring to continuously push the positioning ring through the excess spacing generated on the hexagonal longitudinal support shaft after being compressed, which helps to ensure the normal and effective implementation of the one-time loosening and tightening driving function of the driving ring.

[0027] 3. Through the four U-shaped sliding frames, the four longitudinal support positioning shafts can slide synchronously inward and outward along the four arc-shaped retaining plates to adjust the diameter of the enclosure limit space. This makes the four longitudinal support positioning shafts suitable for enclosing and limiting rubber cartridges of different diameters and specifications, which helps to improve the compatibility of the glue gun with rubber cartridges of different specifications and expand the wide application of the glue gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0029] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0030] In the attached picture:

[0031] Figure 1 The overall structural diagram of the present invention is shown;

[0032] Figure 2 The overall bottom side structural schematic diagram of the present invention is shown;

[0033] Figure 3 A schematic diagram of the installation position of the push plate of the present invention is shown;

[0034] Figure 4 A schematic diagram of a circular plugging cover plate of the present invention in a horizontally opened state is shown;

[0035] Figure 5 A schematic diagram of the initial state of the U-shaped slider of the present invention is shown;

[0036] Figure 6 A schematic diagram showing a disassembled state of the positioning ring of the present invention is shown;

[0037] Figure 7 A schematic diagram of the longitudinal support positioning shaft structure of the present invention is shown;

[0038] Figure 8 A schematic diagram showing a disassembled state of the transmission ring of the present invention is shown;

[0039] Fig. 9 A schematic diagram of the structure of the arc-shaped retaining plate of the present invention is shown;

[0040] Fig.10 The present invention shows Figure 2 The enlarged structural diagram of part A in the middle;

[0041] Fig.11 The present invention shows Figure 5 The enlarged structural diagram of part B is shown in the figure.

[0042] List of reference numerals:

[0043] 1. Cylinder; 101. Extended mounting plate; 102. Arc-shaped retaining plate; 103. Positioning block; 104. L-shaped mounting rod; 105. Longitudinal mounting groove; 106. Hexagonal longitudinal support shaft; 1061. Transmission spring; 107. U-shaped slider; 108. Driving block;

[0044] 2. Handle; 201. Air inlet pipe; 202. Pneumatic pressure regulating valve; 203. Trigger;

[0045] 3. Glue cartridge;

[0046] 4. Longitudinal support positioning shaft; 401. U-shaped sliding frame; 402. Connecting rod;

[0047] 5. Threaded drive ring; 501. Drive ring; 502. U-shaped drive frame;

[0048] 6. Drive ring; 601. Positioning bolt;

[0049] 7. Positioning ring; 701. Limit strip frame; 702. Longitudinal positioning rod;

[0050] 8. Circular plugging disc; 801. Swing rod; 802. Pull rod;

[0051] 9. Pushing disc. Detailed implementation mode

[0052] To make the objectives, technical solutions and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions of the present invention with reference to the drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0053] Please refer to Figures 1 to 11 ; Embodiment 1

[0054] The present invention provides a manual glue gun, including: a cylinder 1 and a glue cartridge 3. Four arc-shaped retaining plates 102 that are longitudinally supported are circumferentially welded around the outer periphery of the head end of the cylinder 1. The four arc-shaped retaining plates 102 are longitudinally supported, and a cylindrical placement space for inserting the glue cartridge 3 is formed by surrounding therebetween;

[0055] A circular plugging disc 8 is swingably installed at the head end portion of the bottom-side arc-shaped retaining plate 102. When the circular plugging disc 8 is swingably placed in an upright state, it abuts against the head ends of the four arc-shaped retaining plates 102, and is used to tightly hold and block the glue cartridge 3 in the cylindrical placement space;

[0056] The head end of the four arc-shaped retaining plates 102 is pushed by a spring and slidably mounted with a positioning ring 7, and the parts of the four arc-shaped retaining plates 102 deviating from the middle are slidably mounted with a driving ring 6, and a positioning bolt 601 is screwed and installed through the circumferential side wall of the driving ring 6;

[0057] A swing driving assembly is provided between the circular plugging cover plate 8 and the driving ring 6 to drive the circular plugging cover plate 8 to swing up and down. When the driving ring 6 slides toward the positioning ring 7, the swing driving assembly first drives the circular plugging cover plate 8 to swing to an upright position for blocking and limiting the rubber cylinder 3. After the circular plugging cover plate 8 is driven to the upright position, the driving ring 6 can continue to slide and abut against the positioning ring 7, so that the positioning ring 7 is pushed and slidably mounted on the circular plugging cover plate 8 in the upright position, so as to position the circular plugging cover plate 8.

[0058] In the initial state, the positioning ring 7 is placed in a state separated from the circular plugging plate 8. When the positioning ring 7 is inserted and matched with the circular plugging plate 8, the circular plugging plate 8 can be inserted and limited to an upright position of swinging upward, so that the circular plugging plate 8 is kept in a state of blocking and limiting the rubber cylinder 3.

[0059] Four longitudinal support positioning shafts 4 are slidably mounted around the four arc-shaped retaining plates 102, and a surrounding limiting space for centering the rubber cylinder 3 in the cylindrical placement space is formed between the four longitudinal support positioning shafts 4, and the surrounding limiting space is a cylindrical structure;

[0060] A U-shaped sliding frame 401 is welded to the middle section of the longitudinal support positioning shaft 4, and the four U-shaped sliding frames 401 are corresponding to the middle parts of the four arc-shaped retaining plates 102 and slide through them; the tail ends of the four arc-shaped retaining plates 102 are provided with external threads, and the external thread sections of the four arc-shaped retaining plates 102 are screwed together to be fitted with a threaded driving ring 5, and an annular track groove is provided on the outer side of the end of the threaded driving ring 5 close to the U-shaped sliding frame 401, and a transmission ring 501 is rotatably installed in the annular track groove; four U-shaped transmission frames 502 are welded around the outer ring of the circumference of the transmission ring 501, and four groups of connecting rods 402 are rotatably connected between the four U-shaped transmission frames 502 and the four U-shaped sliding frames 401.

[0061] Preferably, a piston rod is installed at the center of the cylinder 1, and a push plate 9 is screwed and fixed at the head end of the piston rod. The push plate 9 is slidably plugged into the vacant part of the tail end of the rubber cylinder 3, and is used to push and contact with the sealing piston in the tail end of the rubber cylinder 3 to press and discharge the glue in the rubber cylinder 3; an extended mounting plate 101 with an increased diameter is welded at the head end of the cylinder 1, and the tail ends of the four arc-shaped retaining plates 102 are all welded and fixed to the circumferential outer edge of the extended mounting plate 101;

[0062] The four longitudinal support positioning shafts 4 are used to block and limit the rubber cylinder 3, so as to keep the rubber cylinder 3 centered in the cylindrical placement space for the push plate 9 to push; when the circular blocking cover plate 8 is swung to a vertical position, it also abuts against the four longitudinal support positioning shafts 4 and the head end of the rubber cylinder 3 at the same time. When the circular blocking cover plate 8 is swung to a vertical position, the rubber cylinder 3 can be blocked and limited in the blocking limit space, so as to prevent the push plate 9 from pushing and driving the sealing piston to squeeze out the glue in the rubber cylinder 3 and push the rubber cylinder 3 out of the blocking limit space, thereby affecting the normal and effective implementation of the glue application operation;

[0063] Through the four U-shaped sliding frames 401, the four longitudinal support positioning shafts 4 can slide synchronously inward and outward along the four arc-shaped retaining plates 102 to adjust the diameter of the enclosure limiting space, so that the four longitudinal support positioning shafts 4 can be used to implement enclosure limiting for the rubber cylinders 3 with different diameters and specifications, which helps to improve the compatibility of the glue gun with the rubber cylinders 3 of different specifications and expand the wide application of the glue gun;

[0064] The four groups of connecting rods 402, the four U-shaped slide frames 401 and the transmission ring 501 are connected together to form a four-way crank slider mechanism. Through this four-way mechanism, sliding the transmission ring 501 toward or away from the positioning ring 7 can drive the four U-shaped slide frames 401 and the four longitudinal support positioning shafts 4 to slide synchronously inside and outside; the threaded drive ring 5 is used for forward and reverse rotation propulsion to drive the transmission ring 501 to slide toward or away from the positioning ring 7, providing the driving force for the four longitudinal support positioning shafts 4 to adjust the internal and external synchronous sliding; the transmission ring 501 is rotatably installed with the threaded drive ring 5 through the annular track groove and can rotate freely relative to the threaded drive ring 5, which makes the transmission ring 501 suitable for the forward and reverse rotation propulsion action of the threaded drive ring 5, avoiding the transmission ring 501 being statically limited by the four groups of connecting rods 402 and the four U-shaped slide frames 401, resulting in the threaded drive ring 5 being unable to normally and effectively implement the forward and reverse rotation propulsion operation.

[0065] Preferably, the swing drive assembly as a whole is composed of a transmission spring 1061 , a U-shaped slider 107 , a drive block 108 , a swing rod 801 and a pull rod 802 .

[0066] Preferably, the rocker arm 801 is welded and fixed on the circumferential outer edge portion of the circular plugging cover plate 8, the rocker arm 801 remains parallel to the circular plugging cover plate 8 and protrudes from the circumferential outer edge portion of the circular plugging cover plate 8; two L-shaped mounting rods 104 are symmetrically welded on the bottom side of the head end portion of the bottom arc-shaped retaining plate 102, a centering shaft is welded between the head ends of the two L-shaped mounting rods 104, and the middle part of the rocker arm 801 is rotatably matched with the centering shaft.

[0067] Preferably, a longitudinal mounting groove 105 is penetrated through the head end portion of the bottom arc-shaped retaining plate 102, and a hexagonal longitudinal support shaft 106 is welded to the inside of the longitudinal mounting groove 105; a C-shaped slider 107 is slidably mounted on the hexagonal longitudinal support shaft 106, a pull rod 802 is rotatably connected between the C-shaped slider 107 and the tail end of the rocker bar 801, and a drive block 108 is slidably mounted on a portion of the hexagonal longitudinal support shaft 106 away from the L-shaped mounting rod 104; a transmission spring 1061 is mounted on a portion of the hexagonal longitudinal support shaft 106 located between the C-shaped slider 107 and the drive block 108.

[0068] Preferably, three limiting strip frames 701 are arranged around the side of the positioning ring 7 facing the driving ring 6, the limiting strip frames 701 are longitudinally supported and have longitudinal positioning rods 702 welded inside; three positioning blocks 103 are welded on the three upper arc-shaped retaining plates 102 close to the positioning ring 7, and the three limiting strip frames 701 are slidably inserted into and matched with the three limiting strip frames 701, and the three longitudinal positioning rods 702 are slidably fitted with the three positioning blocks 103 through spring pushing.

[0069] Preferably, the lower half of the driving block 108 protrudes from the longitudinal mounting groove 105 , and the driving ring 6 sequentially abuts against the lower half of the driving block 108 and three limiting strip frames 701 when sliding toward the positioning ring 7 .

[0070] The rocker arm 801, the pull rod 802 and the C-shaped slider 107 together form a crank slider mechanism, through which the rocker arm 801 and the circular plugging plate 8 can be driven to swing up and down and open and close by sliding the C-shaped slider 107 toward or away from the positioning ring 7 along the hexagonal longitudinal support shaft 106, so as to loosen or tighten the rubber cylinder 3; through the transmission spring 1061, the driving block 108 can slide back and forth along the hexagonal longitudinal support shaft 106, so as to drive the C-shaped slider 107 to slide toward or away from the positioning ring 7; through the driving block 108, when the driving ring 6 slides toward the positioning ring 7, it can push and drive the driving block 108 to slide in the same direction, so as to drive and control the circular plugging plate 8 to swing upward to an upright posture.

[0071] Through the three limiting strip frames 701, when the driving ring 6 slides toward the positioning ring 7, it can push and drive the positioning ring 7 to move in the same direction, and drive and control the positioning ring 7 to be inserted and matched with the upright circular blocking cover plate 8.

[0072] In the process of the driving ring 6 sliding toward the positioning ring 7, it first comes into contact with the driving block 108 and drives the circular plugging cover plate 8 to swing to an upright position. When the circular plugging cover plate 8 is in an upright position, it comes into contact with the head ends of the four longitudinal support positioning shafts 4 and is blocked and limited to a static state. When the circular plugging cover plate 8 is limited to an upright static state, the U-shaped slider 107 is also limited to a static position. At this time, the driving ring 6 can compress the transmission spring 1061 through the driving block 108, continue to slide toward the positioning ring 7, come into contact with the three limiting strips 701, and push the positioning ring 7 to be inserted into the circular plugging cover plate 8 in an upright state (refer to Figure 1 and Figure 2 ); When the driving circle 6 slides away from the positioning circle 7 to reset, it first separates from the three limit strips 701. After the driving circle 6 is separated from the three limit strips 701, the positioning circle 7 loses the pushing and holding force from the driving circle 6, and is automatically driven by the springs on the three longitudinal positioning rods 702 to rebound and slide away from the circular plugging plate 8 to reset and separate from the circular plugging plate 8, releasing the circular plugging plate 8. In the process of sliding and resetting the driving circle 6, the compressed transmission spring 1061 can continuously rebound and stretch, continuously pushing the driving block 108 against the driving circle 6 and pushing to drive the driving block 108 to slide and reset in the same direction with the driving circle 6. When the driving circle 6 is separated from the three limit strips 701, the transmission spring 1061 is completely The driving ring 6 is stretched out and releases the pushing and holding force on the U-shaped slider 107 and the circular blocking cover plate 8 as well as the reverse pushing driving force on the driving block 108. After the driving ring 6 is separated from the three limiting strip frames 701, the driving ring 6 continues to slide away from the positioning ring 7 until it is reset to the initial state. When the driving ring 6 slides and resets to the initial state, the pushing force of the transmission spring 1061 on the U-shaped slider 107, the circular blocking cover plate 8 and the driving block 108 has been released and the circular blocking cover plate 8 has been released, so that the driving block 108 stops resetting and sliding and forms an empty space between the driving ring 6. The circular blocking cover plate 8 can swing downward to the horizontally opened use state by its gravity, and continues to slide and drive the driving block 108 to reset (refer to Figure 4 and Figure 5 );

[0073] The head end of the positioning bolt 601 is in contact with the topmost arc-shaped retaining plate 102, and the positioning bolt 601 can tighten the driving ring 6 and position it in a sliding position close to the positioning ring 7, so that the circular plugging plate 8 and the positioning ring 7 are respectively maintained in the use state of vertically blocking the rubber cylinder 3 and fitting with the circular plugging plate 8.

[0074] It is worth noting that: in the initial state, the transmission spring 1061 is in a stretched state, and the driving block 108 rests against the end of the longitudinal mounting groove 105 away from the positioning ring 7; in the above process, when the driving ring 6 slides and resets to the initial state, the circular blocking cover plate 8 can use the vacant space formed between the driving block 108 and the driving ring 6 to continuously push and reset the driving block 108.

[0075] The driving ring 6 is a mechanism for transmitting the loosening and tightening driving force between the circular plugging plate 8 and the positioning ring 7, and implementing a one-time driving of the circular plugging plate 8 and the positioning ring 7; through the power transmission of the transmission spring 1061, the driving block 108 and the three limiting strip frames 701 and the use of the rebound pushing function of the composite transmission spring 1061 and the springs on the three longitudinal positioning rods 702, when the driving ring 6 slides toward or away from the positioning ring 7, it can drive the circular plugging plate 8 and the positioning ring 7 in turn to perform up and down swinging, opening and closing and reciprocating sliding actions, and complete the loosening and tightening operations of the rubber cylinder 3 and the circular plugging plate 8 at one time. Compared with the existing technology that lacks a one-time driving mechanism between the circular plugging plate 8 and the positioning ring 7, the trouble of driving the circular plugging plate 8 and the positioning ring 7 in steps and in turn to loosen and tighten the rubber cylinder 3 and the circular plugging plate 8 before and after each replacement and disassembly of the rubber cylinder 3 is eliminated. The operation is convenient and time-saving, which helps to improve the efficiency of disassembly and replacement of the rubber cylinder 3 and indirectly improve the efficiency of glue gun glue application.

[0076] The transmission spring 1061 can provide the required sliding stroke for the continuous pushing drive of the driving circle 6 to the positioning circle 7 through the residual spacing generated on the hexagonal longitudinal support shaft 106 after being compressed; when the driving circle 6 continues to slide toward the positioning circle 7, the transmission spring 1061 is compressed to push the positioning circle 7 to be inserted into the circular plugging plate 8 in an upright posture. The transmission spring 1061 can continuously push the U-shaped slider 107 to a static state, so that the circular plugging plate 8 is kept in an upright blocking limit position for use, so that the positioning ring 7 and the circular plugging plate 8 can be inserted and matched in the subsequent process. Based on the above, the setting of the transmission spring 1061 helps to ensure the normal and effective implementation of the one-time loosening and tightening driving function of the driving circle 6 on the rubber cylinder 3 and the circular plugging plate 8.

[0077] Based on the first embodiment, the second embodiment:

[0078] A handle 2 arranged obliquely is fixedly installed at the bottom side of the head end of the cylinder 1, an air inlet pipe 201 is fixedly connected to the bottom end of the handle 2, an air pressure regulating valve 202 is installed at the top end of the air inlet pipe 201, and a trigger 203 is rotatably installed at the top end of the handle 2; a through hole is formed through the center of the circular plugging cover plate 8, a conical rubber outlet hose is screwed and connected to the rubber outlet nozzle at the head end of the rubber cylinder 3, and the conical rubber outlet hose passes through the through hole and is screwed and assembled with the rubber outlet nozzle of the rubber cylinder 3;

[0079] The air inlet pipe 201 is connected to an external pressurized air source; the air pressure regulating valve 202 is used to adjust the air inlet pressure; the trigger 203 is used to control the extension and retraction of the piston rod by switching the air intake and exhaust of the cylinder 1, and the piston rod is used to extend and retract the push plate 9.

[0080] The working principle of this embodiment is as follows: when in use, an external pressurized air source is connected through the air inlet pipe 201, and the air pressure regulating valve 202 is used to adjust the air inlet pressure; the trigger 203 is used to control the extension and retraction of the piston rod by switching the air inlet and exhaust of the air cylinder 1, and the piston rod is used to extend and retract the push plate 9, and the push plate 9 is slidably plugged with the vacant part at the rear end of the rubber cylinder 3, and is used to push and contact with the sealing piston in the rear end of the rubber cylinder 3, and the glue liquid in the rubber cylinder 3 is pushed out to implement glue application;

[0081] The four-way longitudinal support positioning shaft 4 is used to block and limit the rubber cylinder 3, so as to keep the rubber cylinder 3 centered in the cylindrical placement space for the push plate 9 to push up. When the circular plugging cover plate 8 is swung to a vertical position, the rubber cylinder 3 can be blocked and limited in the blocking and limiting space to prevent the push plate 9 from pushing and driving the sealing piston to squeeze out the glue in the rubber cylinder 3 and pushing the rubber cylinder 3 out of the blocking and limiting space, thereby affecting the normal and effective implementation of the glue application operation; when the positioning ring 7 is inserted and matched with the circular plugging cover plate 8, the circular plugging cover plate 8 can be inserted and limited in an upwardly swung vertical position, so that the circular plugging cover plate 8 is kept in a state of use for blocking and limiting the rubber cylinder 3;

[0082] Through the four-way U-shaped sliding frame 401, the four-way longitudinal support positioning shaft 4 can slide synchronously inside and outside along the four-way arc-shaped retaining plate 102, and the diameter of the enclosure limiting space can be adjusted, which is suitable for implementing enclosure limiting on the rubber cylinder 3 with different diameters; the four sets of connecting rods 402, the four-way U-shaped sliding frame 401 and the transmission ring 501 are connected together to form a four-way crank slider mechanism, through which the four-way mechanism, sliding the transmission ring 501 toward or away from the positioning ring 7 can drive the four-way U-shaped sliding frame 401 and the four-way longitudinal support positioning shaft 4 to slide synchronously inside and outside; the threaded driving ring 5 is used for forward and reverse rotation to drive the transmission ring 501 to slide toward or away from the positioning ring 7, providing a driving force for the four-way longitudinal support positioning shaft 4 to slide synchronously inside and outside;

[0083] In the process of the driving ring 6 sliding toward the positioning ring 7, it first comes into contact with the driving block 108 and drives the circular plugging cover plate 8 to swing to an upright position. When the circular plugging cover plate 8 is in an upright position, it comes into contact with the head ends of the four longitudinal support positioning shafts 4 and is blocked and limited to a static state. When the circular plugging cover plate 8 is limited to an upright static state, the U-shaped slider 107 is also limited to a static position. At this time, the driving ring 6 can compress the transmission spring 1061 through the driving block 108, continue to slide toward the positioning ring 7, come into contact with the three limiting strips 701, and push the positioning ring 7 to be inserted into the circular plugging cover plate 8 in an upright state (refer to Figure 1 and Figure 2); When the driving circle 6 slides away from the positioning circle 7 to reset, it first separates from the three limit strips 701. After the driving circle 6 is separated from the three limit strips 701, the positioning circle 7 loses the pushing and holding force from the driving circle 6, and is automatically driven by the springs on the three longitudinal positioning rods 702 to rebound and slide away from the circular plugging plate 8 to reset and separate from the circular plugging plate 8, releasing the circular plugging plate 8. In the process of sliding and resetting the driving circle 6, the compressed transmission spring 1061 can continuously rebound and stretch, continuously pushing the driving block 108 against the driving circle 6 and pushing to drive the driving block 108 to slide and reset in the same direction with the driving circle 6. When the driving circle 6 is separated from the three limit strips 701, the transmission spring 1061 is completely The driving ring 6 is stretched out and releases the pushing and holding force on the U-shaped slider 107 and the circular blocking cover plate 8 as well as the reverse pushing driving force on the driving block 108. After the driving ring 6 is separated from the three limiting strip frames 701, the driving ring 6 continues to slide away from the positioning ring 7 until it is reset to the initial state. When the driving ring 6 slides and resets to the initial state, the pushing force of the transmission spring 1061 on the U-shaped slider 107, the circular blocking cover plate 8 and the driving block 108 has been released and the circular blocking cover plate 8 has been released, so that the driving block 108 stops resetting and sliding and forms an empty space between the driving ring 6. The circular blocking cover plate 8 can swing downward to the horizontally opened use state by its gravity, and continues to slide and drive the driving block 108 to reset (refer to Figure 4 and Figure 5 ).

[0084] In this article, there are a few points to note:

[0085] 1. The drawings of the embodiments of the present invention only involve structures related to the embodiments of the present invention, and other structures can refer to the general design.

[0086] 2. In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to obtain new embodiments.

[0087] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A manual caulking gun, comprising: A cylinder (1) and a rubber cartridge (3), wherein the outer circumference of the front end of the cylinder (1) is surrounded by four arc-shaped retaining plates (102) for longitudinal support, the four arc-shaped retaining plates (102) are longitudinally supported, and a cylindrical placement space for inserting the rubber cartridge (3) is formed between the four arc-shaped retaining plates (102); The invention is characterized in that a circular blocking cover plate (8) is swivelledly installed at the head end of the arc-shaped retaining plate (102) at the bottom side, and when the circular blocking cover plate (8) is swivelled and placed in an upright state, it abuts against the head ends of the four arc-shaped retaining plates (102) to block and limit the rubber cylinder (3) in the cylindrical placement space; The head end portions of the arc-shaped retaining plates (102) at four locations are pushed by springs and slidably mounted with positioning rings (7), and the portions of the arc-shaped retaining plates (102) deviating from the middle are slidably mounted with driving rings (6), and positioning bolts (601) are screwed and installed through the circumferential side walls of the driving rings (6); A swing drive assembly for driving the circular blocking cover plate (8) to swing up and down is arranged between the circular blocking cover plate (8) and the driving ring (6). When the driving ring (6) slides toward the positioning ring (7), the swing drive assembly first drives the circular blocking cover plate (8) to swing to an upright position for blocking and limiting the rubber cylinder (3). After the circular blocking cover plate (8) is driven to the upright position, the driving ring (6) can continue to slide and abut against the positioning ring (7), so that the positioning ring (7) is pushed and slidably mounted on the circular blocking cover plate (8) in the upright position, thereby positioning the circular blocking cover plate (8). The swing drive assembly as a whole is composed of a transmission spring (1061), a U-shaped slider (107), a drive block (108), a swing rod (801) and a pull rod (802); The swing rod (801) is welded and fixed to the circumferential outer edge portion of the circular plugging plate (8), the swing rod (801) is kept parallel to the circular plugging plate (8) and protrudes from the circumferential outer edge portion of the circular plugging plate (8); Two L-shaped mounting rods (104) are symmetrically welded to the bottom side of the head end portion of the arc-shaped retaining plate (102) at the bottom side, a centering shaft is welded between the head ends of the two L-shaped mounting rods (104), and the middle portion of the swing rod (801) is rotatably matched with the centering shaft; A longitudinal installation groove (105) is formed through the head end of the arc-shaped retaining plate (102) on the bottom side, and a hexagonal longitudinal support shaft (106) is welded inside the longitudinal installation groove (105); The U-shaped slider (107) is slidably mounted on the hexagonal longitudinal support shaft (106), the pull rod (802) is rotatably connected between the U-shaped slider (107) and the tail end of the swing rod (801), and the driving block (108) is slidably mounted on the portion of the hexagonal longitudinal support shaft (106) away from the L-shaped mounting rod (104); The transmission spring (1061) is sleeved on the portion of the hexagonal longitudinal support shaft (106) located between the U-shaped slider (107) and the driving block (108); Three limiting strip frames (701) are arranged around one side of the positioning ring (7) facing the driving ring (6), and the limiting strip frames (701) are longitudinally supported and have longitudinal positioning rods (702) welded inside; Three positioning blocks (103) are welded on the three upper arc-shaped retaining plates (102) near the positioning ring (7), and the three limiting strips (701) are correspondingly slidably inserted into the three limiting strips (701), and the three longitudinal positioning rods (702) are pushed by springs to slide through the three positioning blocks (103); The lower half of the driving block (108) protrudes from the longitudinal mounting groove (105), and the driving ring (6) sequentially contacts the lower half of the driving block (108) and three limiting strip frames (701) when sliding toward the positioning ring (7).

2. A manual caulking gun according to claim 1, characterized in that: Four longitudinal support positioning shafts (4) are slidably mounted on the four arc-shaped retaining plates (102), and a surrounding limiting space for centering the rubber cylinder (3) in the cylindrical placement space is formed between the four longitudinal support positioning shafts (4), and the surrounding limiting space is a cylindrical structure.

3. A manual caulking gun according to claim 2, characterized in that: A U-shaped sliding frame (401) is welded to the middle section of the longitudinal support positioning shaft (4), and the four U-shaped sliding frames (401) are correspondingly penetrated and slidably matched with the middle parts of the four arc-shaped retaining plates (102); The tail end portions of the arc-shaped retaining plates (102) at four locations are all provided with external threads, and the external threaded sections of the arc-shaped retaining plates (102) at four locations are screwed together to be fitted with a threaded drive ring (5), and an annular track groove is provided on the outer side of one end of the threaded drive ring (5) close to the U-shaped slide frame (401), and a transmission ring (501) is rotatably installed in the annular track groove; Four U-shaped transmission frames (502) are welded around the outer circumference of the transmission ring (501), and four sets of connecting rods are rotatably connected between the four U-shaped transmission frames (502) and the four U-shaped sliding frames (401).

4. A manual caulking gun according to claim 1, characterized in that: A handle (2) arranged in an inclined manner is fixedly mounted on the bottom side of the head end portion of the cylinder (1); an air intake pipe (201) is fixedly connected to the bottom end of the handle (2); an air pressure regulating valve (202) is mounted on the top end portion of the air intake pipe (201); and a trigger (203) is rotatably mounted on the top end portion of the handle (2); A through hole is formed at the center of the circular plugging cover plate (8), and a conical glue outlet pipe is screwed and connected to the glue outlet nozzle at the head end of the glue cylinder (3), and the conical glue outlet pipe passes through the through hole and is screwed and assembled with the glue outlet nozzle of the glue cylinder (3).

Images