A dismounting device for high-pressure spray gun nozzle

Abstract

The utility model discloses a kind of dismounting devices of high-pressure spray gun nozzle, including with the sealing rotary connection of nozzle connecting seat, internal thread is provided on connecting seat, for with the front end threaded connection of high-pressure spray gun body, characterized in that rotating power mechanism is provided on connecting seat;Advantages are that connecting seat is rotated by handle, increase the force arm when manually operating, so that connecting seat can be easily and reliably fastened in the front end of gun body, avoid leakage when using;And connecting seat is also equally easy and labor-saving to be disassembled.

Description

Technical Field

[0001] This utility model relates to the field of spray gun technology, and in particular to a disassembly and assembly device for a high-pressure spray gun nozzle. Background Technology

[0002] A high-pressure spray gun uses a high-pressure plunger pump to directly pressurize liquid, forming a high-pressure liquid that is ejected from the nozzle and atomized into a gas stream. Currently, the nozzles on high-pressure spray guns are mostly fixed to the front end of the gun body by threaded connections. However, due to the high pressure of the sprayed liquid, leakage can easily occur if the nozzle is not tightened enough. Moreover, the installation of the nozzle is mostly done manually, which makes it quite laborious to tighten or remove the nozzle manually. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a device for disassembling and assembling a high-pressure spray gun nozzle, which can easily tighten or remove the nozzle.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a disassembly and assembly device for a high-pressure spray gun nozzle, including a connecting seat that is rotatably and sealingly connected to the nozzle, the connecting seat being provided with an internal thread for threaded connection with the front end of the high-pressure spray gun body, and the connecting seat being provided with a rotation assist mechanism.

[0005] Furthermore, the rotation assist mechanism includes a handle and a push block hinged in the handle. A gear is integrally or fixedly provided on the outer surface of the connecting seat. The handle is sleeved on the connecting seat. A left top tooth and a right top tooth are integrally provided at both ends of the push block. A reversing mechanism is provided inside the handle to control the left top tooth or the right top tooth on the push block to mesh with the gear.

[0006] Furthermore, the reversing mechanism includes a reversing rod, a top ball, and a spring. The handle has a mounting cavity, the reversing rod is disposed in the mounting cavity and extends out of the handle at both ends, the reversing rod is provided with an anti-disengagement mechanism, the top ball is mounted on the reversing rod, the spring is disposed in the reversing rod and abuts against the top ball, and the lower end of the push block is provided with at least two locking grooves arranged side by side. When the top ball abuts against different locking grooves, the left or right top tooth on the push block meshes with the gear.

[0007] Furthermore, when the top ball abuts in the locking groove on the left side, the left top tooth meshes with the gear, and the angle between the line connecting the tip of the tooth meshing with the left top tooth on the gear and the hinge center point of the push block and the line connecting the hinge center point of the push block and the center of the top ball is a right angle; when the top ball abuts in the locking groove on the right side, the right top tooth meshes with the gear, and the angle between the line connecting the tip of the tooth meshing with the right top tooth on the gear and the hinge center point of the push block and the line connecting the hinge center point of the push block and the center of the top ball is a right angle.

[0008] Furthermore, there are three locking slots. When the top bead is abutted in the middle locking slot, the left and right top teeth are in a suspended state.

[0009] Furthermore, the rotation assist mechanism includes a handle and a push block hinged within the handle. The outer surface of the connecting seat is integrally or fixedly provided with a first ratchet and a second ratchet. The first ratchet and the second ratchet are arranged side by side along the axial direction of the connecting seat, and the ratchet teeth on the first ratchet face opposite directions to the ratchet teeth on the second ratchet. The handle is sleeved on the connecting seat. The two ends of the push block are integrally provided with a left pawl and a right pawl. The handle is provided with a reversing mechanism for controlling the left pawl on the push block to engage with the first ratchet or the right pawl to engage with the second ratchet.

[0010] Furthermore, the reversing mechanism includes a reversing rod, a top ball, and a spring. The handle has a mounting cavity, the reversing rod is disposed in the mounting cavity and extends out of the handle at both ends, the reversing rod is provided with an anti-disengagement mechanism, the top ball is mounted on the reversing rod, the spring is disposed in the reversing rod and abuts against the top ball, and the lower end of the push block is provided with at least two locking grooves arranged side by side. When the top ball abuts against different locking grooves, the left pawl on the push block engages with the first ratchet or the right pawl engages with the second ratchet.

[0011] Furthermore, there are three locking slots. When the top ball is in the locking slot on the left, the left pawl engages with the first ratchet. When the top ball is in the locking slot on the right, the right pawl engages with the second ratchet. When the top ball is in the locking slot in the middle, the left and right pawls are in a suspended state.

[0012] Furthermore, a spring seat is provided inside the reversing rod, and the spring abuts against the spring seat. A positioning rod is integrally provided at the lower end of the spring seat, and the positioning rod extends downward through the reversing rod. A positioning groove is provided at the bottom of the mounting cavity. When the top ball abuts against the locking groove located in the middle of the push block, the positioning rod is embedded in the positioning groove.

[0013] Furthermore, the anti-detachment mechanism includes a positioning protrusion integrally mounted on the reversing rod. When the reversing rod moves to the left or right and is in place, the positioning protrusion abuts against the groove wall of the mounting cavity to prevent the reversing rod from slipping off the handle.

[0014] Furthermore, the handle includes a handle base and a handle cover, the handle cover being detachably fixed to the handle base, and the mounting cavity being disposed on the handle base.

[0015] Compared with the prior art, the advantage of this utility model is that the connecting seat is equipped with a rotation assist mechanism, which drives the connecting seat to rotate through the handle, increasing the lever arm during manual operation. This allows the connecting seat to be easily and reliably fastened to the front end of the gun body, preventing leakage during use. Removing the connecting seat is also easy and effortless. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of Embodiment 1 of the present invention after the handle cap has been removed;

[0018] Figure 3 This is one of the schematic diagrams showing the usage state of Embodiment 1 of this utility model;

[0019] Figure 4 This is the second schematic diagram of the usage state of Embodiment 1 of this utility model;

[0020] Figure 5 This is a schematic diagram of the internal structure of Embodiment 2 of this utility model after the handle cap has been removed. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] Example 1: As Figure 1-4As shown, a disassembly and assembly device for a high-pressure spray gun nozzle includes a connecting seat 2 that is rotatably and sealingly connected to the nozzle 1. The connecting seat 2 has an internal thread 21 for threaded connection with the front end of the high-pressure spray gun. The connecting seat 2 is provided with a rotation assist mechanism, which includes a handle sleeved on the connecting seat 2. The handle includes a handle base 3 and a handle cover 31. The handle cover 31 is fixed to the handle base 3 by screws or by snap-fit, facilitating the disassembly and assembly of the handle cover 31 and the handle base 3. A gear 22 is integrally provided on the outer surface of the connecting seat 2. A push block 4 is hinged inside the handle. The two ends of the push block 4 are integrally provided with a left push tooth 41 and a right push tooth 42. A reversing mechanism is provided inside the handle, which includes a reversing rod 5, a top ball 6, and a spring 7. An installation cavity 32 is provided inside the handle base 3, and the reversing rod 5 is located in the installation cavity. The reversing lever 5 is integrally provided with a positioning protrusion 51. When the reversing lever 5 moves to the left or right, the positioning protrusion 51 abuts against the groove wall of the mounting cavity 32 to prevent the reversing lever 5 from sliding off the handle seat 3. The top ball 6 is installed on the reversing lever 5. The spring 7 is installed inside the reversing lever 5 and abuts against the top ball 6. The lower end of the push block 4 is provided with three locking grooves 43 arranged side by side. When the top ball 6 abuts against the locking groove 43 located on the left, the push block 4 is pushed to make the left top tooth 41 mesh with the gear 22. When the top ball 6 abuts against the locking groove 43 located on the right, the push block 4 is pushed to make the right top tooth 42 mesh with the gear 22. When the top ball 6 abuts against the locking groove 43 located in the middle, the left top tooth 41 and the right top tooth 42 are in a suspended state (i.e., neither of them meshes with the gear 22).

[0023] After the left tooth 41 or right tooth 42 on push block 4 meshes with gear 22, to prevent slippage between teeth during force application, when the left tooth 41 on push block 4 meshes with gear 22, the angle between the line connecting the tip of the tooth on gear 22 that meshes with the left tooth 41 and the hinge center point of push block 4 and the line connecting the hinge center point of push block 4 and the center of the ball of top bead 6 is a right angle. Figure 3 As shown; when the right push tooth 42 meshes with gear 22, the angle between the line connecting the tip of the tooth meshing with the right push tooth 42 and the hinge center point of the push block 4, and the line connecting the hinge center point of the push block 4 and the center of the ball of the push ball 6, is a right angle, as shown. Figure 4 As shown.

[0024] In addition, to facilitate determining whether the top ball 6 is abutting the locking groove 43 located in the middle of the push block 4, a spring seat 8 can be provided in the reversing rod 5, with the spring 7 abutting against the spring seat 8. A positioning rod 81 is integrally provided at the lower end of the spring seat 8, and the positioning rod 81 extends downward through the reversing rod 5. A positioning groove 33 is provided at the bottom of the mounting cavity 32. When the reversing rod 5 is moved, and the top ball 6 abuts against the locking groove 43 located in the middle, the positioning rod 81 is embedded in the positioning groove 33. The feel and sound when the reversing rod 5 is manually pushed can be used to determine whether the top ball 6 has moved into place.

[0025] In the above embodiment 1, the locking groove 43 at the lower end of the push block 4 can also be provided in only two as needed. When the top bead 6 abuts in different locking grooves 43, the left top tooth 41 or the right top tooth 42 on the push block 4 meshes with the gear 22.

[0026] Example 2: Figure 5 As shown, the other structures are the same as in Embodiment 1, except that: in the rotation assist mechanism, the outer surface of the connecting seat 2 is integrally or fixedly provided with a first ratchet 23 and a second ratchet 24, that is: the first ratchet 23 and the second ratchet 24 replace the gear 22 in Embodiment 1. The first ratchet 23 and the second ratchet 24 are arranged side by side along the axial direction of the connecting seat 2, and the ratchet teeth on the first ratchet 23 face opposite directions to the ratchet teeth on the second ratchet 24. The two ends of the push block 4 are integrally provided with a left pawl 44 and a right pawl 45. When the top ball 6 abuts in the locking groove 43 located on the left, the left pawl 44 meshes with the first ratchet 23. When the top ball 6 abuts in the locking groove 43 located on the right, the right pawl 45 meshes with the second ratchet 24. When the top ball 6 abuts in the locking groove 43 located in the middle, the left pawl 44 and the right pawl 45 are in a suspended state.

[0027] In the above embodiment 2, the locking groove 43 at the lower end of the push block 4 can also be provided in only two as needed. When the top bead 6 is abutted in different locking grooves 43, the left pawl 44 on the push block 4 engages with the first ratchet 23 or the right pawl 45 engages with the second ratchet 24.

[0028] The disassembly and assembly process of the nozzle in this utility model is as follows: When it is necessary to install the nozzle 1 onto the high-pressure spray gun, screw the connecting seat 2 on the nozzle 1 onto the front end of the gun body, and then push the reversing rod 5 to move to the left, causing the top ball 6 to abut against the locking groove 43 located on the left side. The top ball 6 pushes the push block 4 to make the left top tooth 41 mesh with the gear 22, or the top ball 6 pushes the push block 4 to make the left pawl 44 mesh with the first ratchet 23. Figure 3 As shown, the handle is then rotated clockwise. This, through the engagement of the left top tooth 41 with the gear 22 or the engagement of the left pawl 44 with the first ratchet 23, causes the connecting seat 2 to rotate clockwise. The handle rotates back and forth repeatedly until the connecting seat 2 is tightened to the front end of the gun body. After tightening, the reversing rod 5 is moved to the right, causing the top ball 6 to abut against the locking groove 43 located in the middle, so that the left top tooth 41 and right top tooth 42, or the left pawl 44 and right pawl 45, are in a suspended state. Figure 2 , 5 As shown, this is to prevent slippage caused by accidentally tightening the connecting seat 2 too much due to accidental activation of the handle during use of the high-pressure spray gun; when it is necessary to remove the nozzle 1, pushing the reversing lever 5 to the right moves the top ball 6 into the locking groove 43 on the right side. The top ball 6 pushes the push block 4 to engage the right top tooth 42 with the gear 22, or the top ball 6 pushes the push block 4 to engage the right pawl 45 with the second ratchet 24, as shown. Figure 4As shown, turn the handle counterclockwise. The engagement of the right top tooth 42 with the gear 22 or the engagement of the right pawl 45 with the second ratchet 24 will cause the connecting seat 2 to rotate counterclockwise, loosening the connecting seat 2. The handle will be turned back and forth repeatedly until the connecting seat 2 is removed from the front end of the gun body.

[0029] The scope of protection of this utility model includes, but is not limited to, the above embodiments. The scope of protection is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art shall fall within the scope of protection of this utility model.

Claims

1. A device for disassembling and assembling a high-pressure spray gun nozzle, comprising a connecting seat that is rotatably and sealingly connected to the nozzle, wherein the connecting seat is provided with an internal thread for threaded connection with the front end of the high-pressure spray gun body, characterized in that: The connecting seat is equipped with a rotation assist mechanism.

2. The disassembly and assembly device for a high-pressure spray gun nozzle as described in claim 1, characterized in that: The rotation assist mechanism includes a handle and a push block hinged in the handle. A gear is integrally or fixedly provided on the outer surface of the connecting seat. The handle is sleeved on the connecting seat. A left top tooth and a right top tooth are integrally provided at both ends of the push block. A reversing mechanism is provided in the handle to control the left top tooth or the right top tooth on the push block to mesh with the gear.

3. The disassembly and assembly device for a high-pressure spray gun nozzle as described in claim 2, characterized in that: The reversing mechanism includes a reversing rod, a top ball, and a spring. The handle has a mounting cavity, the reversing rod is disposed in the mounting cavity and extends out of the handle at both ends, the reversing rod is provided with an anti-disengagement mechanism, the top ball is mounted on the reversing rod, the spring is disposed in the reversing rod and abuts against the top ball, and the lower end of the push block is provided with at least two locking grooves arranged side by side. When the top ball abuts against different locking grooves, the left or right top tooth on the push block meshes with the gear.

4. The disassembly and assembly device for a high-pressure spray gun nozzle as described in claim 3, characterized in that: When the top ball abuts in the locking groove on the left side, the left top tooth meshes with the gear, and the angle between the line connecting the tip of the tooth meshing with the left top tooth on the gear and the hinge center point of the push block and the line connecting the hinge center point of the push block and the center of the top ball is a right angle; when the top ball abuts in the locking groove on the right side, the right top tooth meshes with the gear, and the angle between the line connecting the tip of the tooth meshing with the right top tooth on the gear and the hinge center point of the push block and the line connecting the hinge center point of the push block and the center of the top ball is a right angle.

5. The disassembly and assembly device for a high-pressure spray gun nozzle as described in claim 3, characterized in that: There are three locking slots. When the top bead is abutted in the middle locking slot, the left and right top teeth are in a suspended state.

6. The disassembly and assembly device for a high-pressure spray gun nozzle as described in claim 1, characterized in that: The rotation assist mechanism includes a handle and a push block hinged within the handle. A first ratchet and a second ratchet are integrally or fixedly provided on the outer surface of the connecting seat. The first ratchet and the second ratchet are arranged side by side along the axial direction of the connecting seat, and the ratchet teeth on the first ratchet face opposite directions to the ratchet teeth on the second ratchet. The handle is sleeved on the connecting seat. A left pawl and a right pawl are integrally provided at both ends of the push block. A reversing mechanism is provided inside the handle to control the left pawl on the push block to engage with the first ratchet or the right pawl to engage with the second ratchet.

7. The disassembly and assembly device for a high-pressure spray gun nozzle as described in claim 6, characterized in that: The reversing mechanism includes a reversing rod, a top ball, and a spring. The handle has a mounting cavity, the reversing rod is disposed in the mounting cavity and extends out of the handle at both ends, the reversing rod is provided with an anti-disengagement mechanism, the top ball is mounted on the reversing rod, the spring is disposed in the reversing rod and abuts against the top ball, and the lower end of the push block is provided with at least two locking grooves arranged side by side. When the top ball abuts against different locking grooves, the left pawl on the push block engages with the first ratchet or the right pawl engages with the second ratchet.

8. The disassembly and assembly device for a high-pressure spray gun nozzle as described in claim 7, characterized in that: There are three locking slots. When the top ball is in the locking slot on the left, the left pawl engages with the first ratchet. When the top ball is in the locking slot on the right, the right pawl engages with the second ratchet. When the top ball is in the locking slot in the middle, the left and right pawls are in a suspended state.

9. A disassembly and assembly device for a high-pressure spray gun nozzle as described in claim 5 or 8, characterized in that: The reversing rod is provided with a spring seat, and the spring abuts against the spring seat. The lower end of the spring seat is integrally provided with a positioning rod, which extends downward through the reversing rod. The bottom of the mounting cavity is provided with a positioning groove. When the top ball abuts against the middle locking groove on the push block, the positioning rod is embedded in the positioning groove.

10. A disassembly and assembly device for a high-pressure spray gun nozzle as described in claim 3 or 7, characterized in that: The anti-detachment mechanism includes a positioning protrusion integrally mounted on the reversing rod. When the reversing rod moves to the left or right and is in position, the positioning protrusion abuts against the groove wall of the mounting cavity to prevent the reversing rod from slipping off the handle.

11. A disassembly and assembly device for a high-pressure spray gun nozzle as described in claim 3 or 7, characterized in that: The handle includes a handle base and a handle cover, the handle cover being detachably fixed to the handle base, and the mounting cavity being disposed on the handle base.

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