Quick-release pump body structure for spraying machine

Abstract

The utility model relates to a quick-release pump body structure for a coating machine, which comprises a first shell, a piston rod is inserted on one side of a feeding end of a piston, a second shell is sleeved on the piston rod, a positioning disc is arranged in the first shell, and a telescopic positioning block is arranged on one side of the positioning disc facing the piston rod. A positioning groove for clamping the telescopic positioning block is formed in the side wall of the second shell; a shifting block is arranged at the end, away from the telescopic positioning block, of the positioning disc. Adjusting holes allowing one end of the shifting block to stretch out and deviate in the horizontal direction are formed in the two sides of the first shell. The positioning disc comprises a linkage assembly, the shifting block and the telescopic positioning block are connected with the linkage assembly, and when the shifting block rotates with the axis of the positioning disc as the circle center, the linkage assembly drives the telescopic positioning block to stretch out of the surface of the positioning disc or drives the telescopic positioning block to retract into the positioning disc. The situation that in the prior art, when the piston rod is detached, a fixed side cover covering the surface of the piston rod needs to be detached firstly, then the piston rod can be detached for cleaning and maintenance, and time and labor are wasted in the process is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of spraying equipment, in particular to a quick-detachable pump body structure for a spraying machine. Background Art

[0002] A sprayer is a special coating equipment that uses spraying technology. The sprayer includes a hopper for loading paint, a suction pump connected to the hopper for sucking material, a booster pump at the rear end for pressurizing the paint and connected to the suction pump, and a spray gun head connected to the booster pump for spraying. During the spraying operation, the inhaled paint is pressurized, and after high pressure treatment, the paint is transported to the spray gun of the sprayer, and the spray gun instantly atomizes the paint and releases it onto the surface of the object to be painted.

[0003] When the suction pump is operating, there is paint residue in the suction pipe. When the user switches to different types of paint, there is a problem of the latter paint being mixed with the previous paint residue, affecting the paint spraying quality. Therefore, the suction pipe needs regular maintenance.

[0004] In the related art, the piston rod is fixedly connected to the feed end of the suction pump through a flange and fixedly installed by bolts. When removing the piston rod, it is necessary to first remove the shell covering the surface of the piston rod, and then remove the flange with the help of tools before the piston rod can be removed for cleaning and maintenance. This process has the disadvantage of being time-consuming and labor-intensive.

[0005] The Chinese utility model patent with publication number CN108571444A discloses a reciprocating plunger pump for a sprayer that can be quickly disassembled and assembled, including a shell, a piston arranged in the shell, and a plunger pump assembly connected to the piston, wherein a mounting groove is arranged in the shell; a receiving opening communicating with the mounting groove is arranged on the bottom surface of the mounting groove, and the receiving opening intersects and communicates with the notch of the mounting groove; a U-shaped positioning step is arranged on the inner wall of the mounting groove; one end of the piston is located in the mounting groove and is provided with a connecting groove, and the connecting groove is T-shaped; an opening is arranged on one side of the connecting groove; a piston rod is arranged on the plunger pump assembly; the end of the piston rod is I-shaped, and the end of the piston rod is inserted into the connecting groove through the opening; a disassembly sleeve is arranged on the outer sleeve of the upper part of the plunger pump assembly; an annular groove matching the positioning step is arranged in the middle of the disassembly sleeve.

[0006] The above-mentioned reciprocating piston pump for the spray machine improves the efficiency of installing and disassembling the piston rod. However, when applying the above-mentioned technical solution, when installing the piston rod, it is necessary to fix the fixed side cover on the front side of the piston rod after the piston rod is inserted into the connecting groove. When disassembling the piston rod, it is also necessary to remove the fixed side cover. It can be seen that the efficiency of disassembling the piston rod still needs to be improved. Utility Model Content

[0007] In order to improve the situation in the related art where when disassembling the piston rod, it is necessary to first remove the fixed side cover covering the surface of the piston rod before the piston rod can be disassembled for cleaning and maintenance, which is time-consuming and laborious, the present application provides a quick-disassembly pump body structure for a spraying machine to improve the disassembly efficiency of the piston rod.

[0008] The present application provides a quick-disassembly pump body structure for a spraying machine, adopting the following technical solutions:

[0009] A quick-disassembly pump body structure for a spraying machine, the pump body structure has a feed end and a discharge end. The feed end is connected to a hopper storing paint, and the discharge end is connected to an external booster pump. The pump body structure includes a plunger pump assembly and a piston connected to the plunger pump assembly. The pump body structure further includes a first housing for installing the plunger pump assembly and the piston. A piston rod is provided on the plunger pump assembly, and a second housing is sleeved on the piston rod. The piston rod is inserted into one side of the piston close to the feed end. A positioning disk is installed in the first housing. A telescopic positioning block is provided on the side of the positioning disk facing the piston rod. A positioning groove for the telescopic positioning block to be snapped into is opened on the side wall of the second housing;

[0010] One end of the positioning disk away from the telescopic positioning block is provided with a dial block. Adjusting holes for one end of the dial block to extend out and offset in the horizontal direction are opened on both sides of the first housing;

[0011] The positioning disk includes a linkage assembly. The dial block and the telescopic positioning block are respectively connected to the linkage assembly. When the dial block rotates around the axis line of the positioning disk, the linkage assembly drives the telescopic positioning block to extend out of the surface of the positioning disk or drives the telescopic positioning block to retract into the positioning disk.

[0012] Optionally, the positioning disk includes an upper housing and a lower housing rotatably connected to the upper housing. The lower housing is fixedly installed in the first housing through bolts. A positioning hole is opened on the side of the upper housing facing the second housing. An installation groove is provided in the upper housing, and the installation groove communicates with the positioning hole. The telescopic positioning block is slidably installed in the installation groove. One end of the telescopic positioning block passes through the positioning hole. A first compression spring is installed on the bottom wall of the installation groove, and one end of the first compression spring abuts against the other end of the telescopic positioning block.

[0013] Optionally, the linkage assembly is fixed to the upper housing and slidably connected to the lower housing;

[0014] Then the linkage assembly includes a fixed rod and a sliding rod. One end of the fixed rod is fixed to a side of the upper housing away from the center of the circle, and the other end of the fixed rod is rotatably connected to the lower housing with the center of the lower housing as the rotation center. The sliding rod is slidably connected to the lower housing, and the sliding direction of the sliding rod is parallel to the sliding direction of the telescopic positioning block.

[0015] A telescopic rod is connected between the fixed rod and the sliding rod, and a follower rod is connected between the sliding rod and the telescopic positioning block.

[0016] Optionally, a clamping groove is integrally formed on the side wall of the upper housing. When the dial rotates in a horizontal plane with the center of the upper housing as the rotation center, the side wall of the dial abuts against the groove wall of the clamping groove.

[0017] Optionally, an arc-shaped slideway for the fixed rod to be slidably connected is provided at the edge of the lower housing away from its center, and a straight slideway for the sliding rod to be slidably connected is provided in the middle of the lower housing.

[0018] The dial has an initial posture. When the dial rotates clockwise, the side wall of the dial abuts against the groove wall of the clamping groove to drive the upper housing to rotate clockwise.

[0019] In the initial posture, the dial and the telescopic positioning block are oppositely arranged and divide the lower housing into an upper part and a lower part. Then, when the dial rotates clockwise within the upper part range, the arc-shaped slideway is arranged in the lower part area, and both ends of the straight slideway face the dial and the telescopic positioning block in the initial posture.

[0020] Optionally, a relief surface is provided on the side of the telescopic positioning block away from the piston.

[0021] Optionally, a rotating shaft is fixed in the first housing, and the upper housing is rotatably connected to the rotating shaft in a horizontal plane.

[0022] Then a limiting hole is opened in the upper housing, a bearing is installed in the limiting hole, and the rotating shaft is inserted and fixed in the bearing.

[0023] Optionally, the telescopic rod includes a connecting rod and an inserting rod. A jack is opened at one end of the connecting rod away from the fixed rod. A second compression spring is arranged in the jack. One end of the inserting rod is inserted into the jack and abuts against the second compression spring, and the other end of the inserting rod is fixed to the sliding rod.

[0024] Optionally, a buckling convex block is arranged on the end face of the lower housing facing the upper housing, and a groove for the buckling convex block to be clamped is opened in the upper housing. A margin for the buckling convex block to rotate is left in the groove.

[0025] By adopting the above technical solution, when the shift block is in the initial state, one end of the telescopic positioning block extends out of the positioning hole, and the piston rod is installed at this time. The operator inserts the piston rod from the bottom of the piston through the plunger pump assembly, so that the telescopic positioning block is clamped in the positioning groove of the second shell. Since the telescopic positioning block is provided with a yield surface, when the second shell sleeved on the piston rod moves to the bottom of the telescopic positioning block and continues to move upward, the telescopic positioning block retreats into the positioning disk, and the linkage assembly linked with the telescopic positioning block drives the upper shell to rotate clockwise. After the piston rod is inserted into place, the operator shifts the shift block counterclockwise to make the positioning groove on the upper shell connect to the positioning hole, and the telescopic positioning block pops out under the action of the first compression spring, and one end of the telescopic positioning block is clamped in the positioning groove to realize the limiting of the piston rod. The piston rod can be installed in one step through the above installation method, which is simple to operate and improves the installation efficiency.

[0026] When there is a need to disassemble the plunger pump assembly for subsequent maintenance, the operator moves the shift block in a clockwise direction to rotate the upper shell body circumferentially. At this time, the fixed rod slides in the arc-shaped slideway, and the fixed rod slides from the end of the arc-shaped slideway close to the telescopic positioning block to the end of the arc-shaped slideway away from the telescopic positioning block. The sliding rod moves in the direction away from the second shell body under the drive of the fixed rod, thereby driving the telescopic positioning block to exit the positioning groove. Subsequently, the piston rod can be directly removed from the piston, thereby realizing the disassembly of the plunger pump assembly. The operation is simple and the disassembly efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be discussed below. Obviously, the technical solutions described in conjunction with the drawings are only some embodiments of the utility model. For ordinary technicians in this field, other embodiments and their drawings can be obtained based on the embodiments shown in these drawings without paying creative work.

[0028] Figure 1 It is a structural diagram of a quick-disassembly pump body structure.

[0029] Figure 2 It is a partial cross-sectional view of the quick-disassembly pump body structure.

[0030] Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0031] Figure 4 It is a structural schematic diagram of the upper shell.

[0032] Figure 5 It is a schematic diagram of the structure of the lower shell.

[0033] Figure 6 It is a structural diagram of the linkage component.

[0034] Figure 7 It is an exploded view of the telescopic positioning block and the upper housing.

[0035] Figure 8 It is a schematic structural diagram of the telescopic positioning block protruding from the positioning hole.

[0036] Figure 9 It is a schematic structural diagram of the telescopic positioning block retracted into the positioning hole.

[0037] Figure 10 It is an exploded view of the telescopic rod.

[0038] In the figure: 1. First housing; 2. Piston rod; 3. Second housing; 4. Positioning disc; 5. Telescopic positioning block; 6. Positioning groove; 7. Pusher block; 8. Adjusting hole; 9. Upper housing; 10. Lower housing; 11. Positioning hole; 12. Installation groove; 13. First compression spring; 14. Fixed rod; 15. Sliding rod; 16. Telescopic rod; 17. Follow-up rod; 18. Card slot; 19. Arc-shaped slideway; 20. Straight slideway; 21. Upper part; 22. Lower part; 23. Relief surface; 24. Rotating shaft; 25. Limiting hole; 26. Bearing; 27. Connecting rod; 28. Insertion rod; 29. Insertion hole; 30. Second compression spring; 31. Clamping convex block; 32. Groove; 33. Plunger pump assembly. Specific embodiments

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope protected by the present invention.

[0040] An embodiment of the present invention provides a quick-release pump body structure for a spraying machine, as Figures 1 to 10 shown. The pump body structure has a feed end and a discharge end. The feed end is connected to a hopper storing paint, and the discharge end is connected to an external booster pump. The pump body structure includes a plunger pump assembly 33 and a piston connected to the plunger pump assembly 33. The pump body structure further includes a first housing 1 for installing the plunger pump assembly 33 and the piston. A piston rod 2 and a second housing 3 sleeved on the piston rod 2 are provided on the plunger pump assembly 33. The piston rod 2 is inserted into one side of the piston close to the feed end. A positioning disc 4 is installed in the first housing 1. A telescopic positioning block 5 is provided on the side of the positioning disc 4 facing the piston rod 2. A positioning groove 6 for the telescopic positioning block 5 to be clamped is opened on the side wall of the second housing 3;

[0041] A pusher block 7 is provided at one end of the positioning disc 4 away from the telescopic positioning block 5. Adjusting holes 8 for one end of the pusher block 7 to extend out and offset in the horizontal direction are opened on both sides of the first housing 1;

[0042] The positioning disk 4 includes a linkage assembly. The shifting block 7 and the telescopic positioning block 5 are respectively connected to the linkage assembly. When the shifting block 7 rotates around the axis line of the positioning disk 4, the linkage assembly drives the telescopic positioning block 5 to extend out of the surface of the positioning disk 4 or drives the telescopic positioning block 5 to retract into the positioning disk 4.

[0043] Specifically, in this embodiment, in the assembled state, one end of the piston rod 2 is inserted into the lower end of the piston. The plunger pump assembly 33 is clamped and limited to the first housing 1 through the telescopic positioning block 5, preventing the piston rod 2 from disengaging from the piston due to crosstalk during the working process.

[0044] In a preferred embodiment of the present utility model, the positioning disk 4 includes an upper housing 9 and a lower housing 10 rotatably connected to the upper housing 9. The lower housing 10 is fixedly installed in the first housing 1 through bolts. A positioning hole 11 is provided on one side of the upper housing 9 facing the second housing 3. An installation groove 12 is provided in the upper housing 9. The installation groove 12 communicates with the positioning hole 11. The telescopic positioning block 5 is slidably installed in the installation groove 12. One end of the telescopic positioning block 5 passes through the positioning hole 11. A first compression spring 13 is installed on the bottom wall of the installation groove 12. One end of the first compression spring 13 abuts against the other end of the telescopic positioning block 5.

[0045] Specifically, in this embodiment, since the lower housing 10 is fixedly installed in the first housing 1, when the upper housing 9 rotates circumferentially under the drive of the shifting block 7, the lower housing 10 can remain relatively stationary to achieve the purpose of driving the telescopic positioning block 5 to withdraw from the positioning groove 6 during disassembly by the linkage assembly.

[0046] At least two enclosing plates are integrally formed in the upper housing 9 to form the installation groove 12. A support rod is fixed on the bottom wall of the installation groove 12. The support rod is slidably connected to the end of the telescopic positioning block 5 away from the positioning hole 11. The first compression spring 13 is sleeved on the support rod, and one end of the first compression spring 13 abuts against the bottom wall of the installation groove 12, and the other end abuts against the telescopic positioning block 5. When the follower rod 17 drives the telescopic positioning block 5 to extend out of the positioning hole 11, the telescopic positioning block 5 is also subjected to the extrusion force of the first compression spring 13 to push it out.

[0047] In a preferred embodiment of the present utility model, the linkage assembly is fixed to the upper housing 9 and is slidably connected to the lower housing 10;

[0048] Then the linkage assembly includes a fixed rod 14 and a sliding rod 15. One end of the fixed rod 14 is fixed to the side of the upper housing 9 away from the center of the circle. The other end of the fixed rod 14 is rotatably connected to the lower housing 10 with the center of the lower housing 10 as the rotation center. The sliding rod 15 is slidably connected to the lower housing 10, and the sliding direction of the sliding rod 15 is parallel to the sliding direction of the telescopic positioning block 5;

[0049] A telescopic rod 16 is connected between the fixed rod 14 and the sliding rod 15 , and a follower rod 17 is connected between the sliding rod 15 and the telescopic positioning block 5 .

[0050] Specifically, in the present embodiment, the fixed rod 14 follows the rotation of the upper shell 9 and slides along the edge of the lower shell 10. Since the sliding direction of the sliding rod 15 is limited, the telescopic rod 16 follows the fixed rod 14, driving the sliding rod 15 to translate, causing the telescopic positioning block 5 to exit the positioning groove 6, thereby achieving the unlocking of the telescopic positioning block 5 and the second shell 3.

[0051] There is a gap between the positioning hole 11 and the telescopic positioning block 5. When the shift block 7 drives the upper shell 9 to rotate in the clockwise direction, the side wall of the telescopic positioning block 5 does not abut against the hole wall of the positioning hole 11, so the telescopic positioning block 5 will not be driven to rotate by the upper shell 9, so that the telescopic positioning block 5 can smoothly return to the positioning hole 11.

[0052] In a preferred embodiment of the present invention, a slot 18 is integrally formed on the side wall of the upper shell 9 , and when the shift block 7 rotates in a horizontal plane with the center of the upper shell 9 as the rotation center, the side wall of the shift block 7 abuts against the slot wall of the slot 18 .

[0053] Specifically, in this embodiment, the cooperation between the shift block 7 and the slot 18 allows the operator to unlock the plunger pump assembly 33 and the positioning plate 4 by simply shifting the shift piece, and then pull the piston rod 2 out from under the piston. The operation is simple, the disassembly efficiency is improved, and the transmission structure is simple and the cost is low.

[0054] The shifting block 7 can be welded and fixed on the slot wall of the slot 18 .

[0055] In a preferred embodiment of the present invention, the lower housing 10 is provided with an arc-shaped slideway 19 for sliding connection of the fixing rod 14 at the edge away from the center thereof, and a straight slideway 20 for sliding connection of the sliding rod 15 is provided in the middle of the lower housing 10;

[0056] The shift block 7 has an initial posture. When the shift block 7 rotates clockwise, the side wall of the shift block 7 abuts against the groove wall of the slot 18 to drive the upper housing 9 to rotate clockwise.

[0057] In the initial posture, the shift block 7 and the telescopic positioning block 5 are relatively arranged to divide the lower shell 10 into an upper part 21 and a lower part 22, then the shift block 7 rotates clockwise within the upper part 21, and the arc slide 19 is arranged in the lower part 22 area, and the two ends of the straight slide 20 are respectively facing the shift block 7 and the telescopic positioning block 5 in the initial posture.

[0058] In a preferred embodiment of the present invention, the telescopic rod 16 includes a connecting rod 27 and an insertion rod 28. The connecting rod 27 is provided with a socket 29 at one end away from the fixed rod 14. A second compression spring 30 is provided in the socket 29. One end of the insertion rod 28 is inserted into the socket 29 and abuts against the second compression spring 30. The other end of the sliding rod 15 is fixed to the sliding rod 15.

[0059] Specifically, in the present embodiment, when the shift block 7 is in the initial posture, the fixed rod 14 is located at one end of the arc-shaped slide 19 close to the telescopic positioning block 5. When the shift block 7 rotates horizontally clockwise with the center of the circle of the upper shell 9 as the rotation center, the fixed rod 14 rotates relative to the lower shell 10 and slides along the arc-shaped slide 19 toward the end away from the telescopic positioning block 5. The telescopic rod 16 then deviates in the direction away from the telescopic positioning block 5 along with the fixed rod 14. Since the length of the telescopic rod 16 is adjustable, the telescopic rod 16 can compensate for the offset of the fixed rod 14 that is different from the moving direction of the sliding rod 15, and the sliding rod 15 can follow the fixed rod 14 to move in the direction away from the second shell 3, thereby achieving the purpose of pulling the telescopic positioning block 5 back into the positioning disk 4.

[0060] In a preferred embodiment of the present invention, the telescopic positioning block 5 has a clearance surface 23 on a side away from the piston.

[0061] Specifically, in the present embodiment, when installing the plunger pump assembly 33, the outer wall of the second shell 3 contacts the yield surface 23 first, and drives the telescopic positioning block 5 to retreat into the positioning plate 4, and the telescopic positioning block 5 pushes the follower rod 17 to deflect, causing the sliding rod 15 to briefly slide in the direction away from the second shell 3. At this time, the fixed rod 14 rotates clockwise in the arc slide 19, and the upper shell 9 rotates clockwise accordingly; after the piston rod 2 is inserted into place, the operator reversely pulls the paddle to rotate the upper shell 9 in the opposite direction, and the positioning hole 11 is connected to the positioning groove 6. Under the action of the first compression spring 13, the telescopic positioning block 5 extends out of the positioning hole 11 and is engaged with the second shell 3.

[0062] In a preferred embodiment of the present utility model, a rotating shaft 24 is fixed inside the first housing 1, and the upper housing 9 is rotatably connected to the rotating shaft 24 in a horizontal plane;

[0063] The upper shell 9 is provided with a limiting hole 25 , a bearing 26 is installed in the limiting hole 25 , and the rotating shaft 24 is inserted and fixed in the bearing 26 .

[0064] Specifically, in this embodiment, the first housing 1 is rotatably connected to the upper housing 9 via the bearing 26, so that the connection structure between the upper housing 9 and the first housing 1 is more stable and reliable.

[0065] In a preferred embodiment of the present invention, a snap-fitting protrusion 31 is provided on the end surface of the lower shell 10 facing the upper shell 9, and a groove 32 for the snap-fitting protrusion 31 to engage is opened on the upper shell 9, and the groove 32 leaves a margin for the snap-fitting protrusion 31 to rotate.

[0066] Specifically, in this embodiment, the buckling mode between the upper shell 9 and the lower shell 10 is simple, which is convenient for product assembly.

[0067] In summary, when the shift block 7 is in the initial state, one end of the telescopic positioning block 5 extends out of the positioning hole 11, and the piston rod 2 is installed at this time. The operator inserts the piston rod 2 from the bottom of the piston through the plunger pump assembly 33, so that the telescopic positioning block 5 is clamped in the positioning groove 6 of the second shell 3. Since the telescopic positioning block 5 is provided with a clearance surface 23, when the second shell 3 sleeved on the piston rod 2 moves to the bottom of the telescopic positioning block 5 and continues to move upward, the telescopic positioning block 5 retreats into the positioning disk 4, and the linkage assembly linked with the telescopic positioning block 5 drives the upper shell 9 to rotate clockwise. After the piston rod 2 is inserted into place, the operator shifts the shift block 7 counterclockwise to make the positioning groove 6 on the upper shell 9 connect to the positioning hole 11, and the telescopic positioning block 5 pops out under the action of the first compression spring 13, and one end of the telescopic positioning block 5 is clamped in the positioning groove 6 to realize the limiting of the piston rod 2. The piston rod 2 can be installed in one step through the above-mentioned installation method, which is simple to operate and has improved installation efficiency.

[0068] When the operator needs to disassemble the plunger pump assembly 33 for subsequent maintenance, the operator moves the shift block 7 in a clockwise direction to rotate the upper shell 9 circumferentially. At this time, the fixed rod 14 slides in the arc slide 19, and the fixed rod 14 slides from the end of the arc slide 19 close to the telescopic positioning block 5 to the end of the arc slide 19 away from the telescopic positioning block 5. The sliding rod 15 moves in the direction away from the second shell 3 under the drive of the fixed rod 14, thereby driving the telescopic positioning block 5 to exit the positioning groove 6. Then the piston rod 2 can be directly removed from the piston, thereby completing the disassembly of the plunger pump assembly 33. The operation is simple and the disassembly efficiency is improved.

Claims

1. A quick-release pump structure for a spraying machine, the pump structure having a feed end and a discharge end, the feed end being connected to a hopper storing paint, the discharge end being connected to an external booster pump, the pump structure comprising a plunger pump assembly (33) and a piston connected to the plunger pump assembly (33), characterized in that: The pump body structure further comprises a first housing (1) for mounting the plunger pump assembly (33) and the piston, the plunger pump assembly (33) being provided with a piston rod (2) and a second housing (3) sleeved on the piston rod (2), the piston rod (2) being plugged into a side of the piston close to the feed end, a positioning plate (4) being installed in the first housing (1), a telescopic positioning block (5) being provided on a side of the positioning plate (4) facing the piston rod (2), and a positioning groove (6) for the telescopic positioning block (5) to be engaged is provided on a side wall of the second housing (3); A shift block (7) is provided at one end of the positioning plate (4) away from the telescopic positioning block (5), and adjustment holes (8) are provided on both sides of the first shell (1) for allowing one end of the shift block (7) to extend out and shift in the horizontal direction; The positioning disk (4) comprises a linkage assembly, the shift block (7) and the telescopic positioning block (5) are respectively connected to the linkage assembly, and when the shift block (7) rotates with the axis of the positioning disk (4) as the center of the circle, the linkage assembly drives the telescopic positioning block (5) to extend out of the surface of the positioning disk (4) or drives the telescopic positioning block (5) to retract into the positioning disk (4).

2. The quick-release pump structure for a spraying machine according to claim 1, characterized in that: The positioning plate (4) comprises an upper shell (9) and a lower shell (10) rotatably connected to the upper shell (9); the lower shell (10) is fixedly installed in the first shell (1) by bolts; a positioning hole (11) is provided on the side of the upper shell (9) facing the second shell (3); a mounting groove (12) is provided in the upper shell (9); the mounting groove (12) is connected to the positioning hole (11); the telescopic positioning block (5) is slidably installed in the mounting groove (12); one end of the telescopic positioning block (5) passes through the positioning hole (11); a first compression spring (13) is installed on the bottom wall of the mounting groove (12); one end of the first compression spring (13) abuts against the other end of the telescopic positioning block (5).

3. The quick-release pump structure for a spraying machine according to claim 2, characterized in that: The linkage assembly is fixed to the upper housing (9) and slidably connected to the lower housing (10); The linkage assembly comprises a fixed rod (14) and a sliding rod (15), one end of the fixed rod (14) is fixed to a side of the upper shell (9) away from the center of the circle, the other end of the fixed rod (14) is rotatably connected to the lower shell (10) with the center of the circle of the lower shell (10) as the rotation center, the sliding rod (15) is slidably connected to the lower shell (10), and the sliding direction of the sliding rod (15) is parallel to the sliding direction of the telescopic positioning block (5); A telescopic rod (16) is connected between the fixed rod (14) and the sliding rod (15), and a follower rod (17) is connected between the sliding rod (15) and the telescopic positioning block (5).

4. The quick-release pump structure for a spraying machine according to claim 3, characterized in that: A slot (18) is integrally formed on the side wall of the upper shell (9); when the shift block (7) rotates in a horizontal plane with the center of the upper shell (9) as the rotation center, the side wall of the shift block (7) abuts against the slot wall of the slot (18).

5. The quick-release pump structure for a spraying machine according to claim 4, characterized in that: The lower shell (10) is provided with an arc-shaped slideway (19) at an edge away from the center of the circle for the fixed rod (14) to be slidably connected, and the middle part of the lower shell (10) is provided with a straight slideway (20) for the sliding rod (15) to be slidably connected; The shift block (7) has an initial posture, and when the shift block (7) rotates clockwise, the side wall of the shift block (7) abuts against the slot wall of the slot (18) to drive the upper shell (9) to rotate clockwise; In the initial posture, the shift block (7) and the telescopic positioning block (5) are arranged relative to each other to divide the lower shell (10) into an upper part (21) and a lower part (22), and the shift block (7) rotates clockwise within the range of the upper part (21), and the arc-shaped slideway (19) is arranged in the lower part (22) area, and the two ends of the straight slideway (20) are respectively oriented toward the shift block (7) and the telescopic positioning block (5) in the initial posture.

6. The quick-release pump structure for a spraying machine according to claim 5, characterized in that: The telescopic positioning block (5) has a clearance surface (23) on a side away from the piston.

7. The quick-release pump structure for a spraying machine according to claim 6, characterized in that: A rotating shaft (24) is fixed inside the first shell (1), and the upper shell (9) is rotatably connected to the rotating shaft (24) in a horizontal plane; The upper shell (9) is provided with a limiting hole (25), a bearing (26) is installed in the limiting hole (25), and the rotating shaft (24) is inserted and fixed in the bearing (26).

8. The quick-release pump structure for a spraying machine according to claim 7, characterized in that: The telescopic rod (16) comprises a connecting rod (27) and an insert rod (28); an insert hole (29) is provided at one end of the connecting rod (27) away from the fixed rod (14); a second compression spring (30) is arranged in the insert hole (29); one end of the insert rod (28) is inserted into the insert hole (29) and abuts against the second compression spring (30); the other end of the sliding rod (15) is fixed to the sliding rod (15).

9. The quick-release pump structure for a spraying machine according to claim 8, characterized in that: A buckling protrusion (31) is arranged on the end surface of the lower shell (10) facing the upper shell (9), and the upper shell (9) is provided with a groove (32) for the buckling protrusion (31) to be engaged, and the groove (32) leaves a margin for the buckling protrusion (31) to rotate.

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