Inner hole spraying device for hardware products

Abstract

The invention relates to the technical field of spraying, and discloses a hardware inner hole spraying device which comprises a metal frame body, two supporting cross rods are fixed to the upper end of the metal frame body, a liquid storage frame is arranged at the lower ends of the supporting cross rods, and a coating unit is fixed to the upper ends of the supporting cross rods; the coating unit comprises an annular piece and a plurality of step layers, the annular piece is fixed to the upper ends of the two supporting transverse rods, the step layers are arranged in a stacked and sleeved mode, and the diameters of the step layers are gradually reduced from bottom to top. The coating units are gradually compressed from the upper ends, in extrusion of the coating units, the uppermost end is firstly extruded, the multiple step layers are gradually compressed from the upper ends when the upper ends are stressed, the compressed step layers can be relatively close to the inner wall of the inner hole, the better spraying effect is achieved, the impact force is increased, and the spraying effect is improved. And the coating of concave-convex parts is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of spraying, in particular to an inner hole spraying device for hardware products. Background Art

[0002] After the parts are produced, they are generally sprayed with paint. Spraying can form a very thin paint film on the surface of the parts to prevent the metal materials in the parts from being exposed to the air and corroding. Spraying is generally done with a paint sprayer. The anti-corrosion paint is atomized through the high pressure in the storage bin and the nozzle structure, and can be evenly adhered to the surface of the parts. After spraying one surface, a fixture is usually used to move the parts and spray other surfaces.

[0003] In the patent with patent number 202010282439.3 and named A Precision Parts Spraying Device, a precision parts spraying device is mentioned. The magnetic field strength of the electromagnet can be controlled, which can attract precision parts of different masses and make them suspended in the air, avoiding the problem of using fixtures to damage the structure of precision parts. On the other hand, it also avoids subsequent secondary measurements and improves the painting efficiency and yield rate.

[0004] The above patent mentions the use of magnetic fields to control the suspension of precision parts to achieve the effect of spraying. However, it is difficult to completely coat and cover parts with large inner holes using the above device. At the same time, if the surface of the part is rough, it is difficult to completely cover the unevenness on the outer wall during the coating process. Therefore, a great impact force is required to cover the uneven part of the part. When the inner hole has an uneven surface, it is necessary to impact along the inner wall of the inner hole to produce the coating effect. Summary of the invention

[0005] The purpose of the present invention is to provide an inner hole spraying device for hardware products to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an inner hole spraying device for hardware products, comprising a metal frame, two supporting cross bars are fixed to the upper end of the metal frame, a liquid storage frame is provided at the lower end of the supporting cross bar, and a coating unit is fixed to the upper end of the supporting cross bar;

[0007] The coating unit includes an annular sheet and multiple step layers, wherein the annular sheet is fixed to the upper ends of two supporting cross bars, and the multiple step layers are stacked and sleeved, and the diameters thereof gradually decrease from bottom to top;

[0008] A nozzle for spraying is fixed on the upper inclined end of each step layer, and a straw is fixed on the lower end of multiple step layers. The straw extends from top to bottom to the inside of the liquid storage frame, and a power box is fixed on the outer wall of the straw, and a pump body is arranged inside the power box.

[0009] Preferably, the step layer at the lowest end is fixed to the annular sheet at the lower end, and a limiting circular layer is fixed on the step layer at the upper end. A metal ball is rotatably installed inside the limiting circular layer. The surface of the metal ball is smooth, and one third of it is located at the upper end of the limiting circular layer.

[0010] Preferably, an annular frame plate is fixed at the lower end of each step layer, and an auxiliary component is provided at the lower end of the annular frame plate;

[0011] The auxiliary component comprises a sleeve rod, a sleeve, an extrusion block, a first limiting frame plate, a second limiting frame plate, a push rod, a coincidence rod, a frame sleeve and a reset spring.

[0012] Preferably, the sleeve rod is supported on the lower end of the upper group of limit frame plates 2, the sleeve is sleeved with the sleeve rod, and a spring for restoring is provided inside the sleeve, the extrusion block is fixed at the lower end of the sleeve, the limit frame plate 1 is fixed to the lower end of the annular frame plate, the extrusion block is located in the limit frame plate 1 and does not contact the limit frame plate 1, the limit frame plate 2 is fixed at the lower end of the annular frame plate, the push rod is slidably arranged in the limit frame plate 2, the inner end of the push rod is matched with the extrusion block, the overlap rod is docked with the outer end of the push rod, and the overlap rod also slides in the limit frame plate 2, the frame sleeve is arranged at the outer end of the overlap rod, and the return spring is fixed inside the frame sleeve, and the outer end of the frame sleeve is fixed to the corresponding step layer.

[0013] Preferably, the inner end of the push rod is arranged in an inclined surface, and the outward side of the extrusion block is also arranged in an inclined surface, and the extrusion block pushes downward to push the push rod to move outward, and at the same time drives the overlap rod to move outward, so that the overlap rod moves out of the second limit frame plate, and the lower end of the overlap rod is arranged in an inclined surface;

[0014] The outer end surface of the second limiting frame plate is flush with the outer side of the step layer at its upper end, and when the overlap rod moves out of the second limiting frame plate, the step layer at the upper end and the step layer at the lower end can overlap under pressure.

[0015] Preferably, a protection unit is further provided at the upper end of the supporting crossbar, and the protection unit comprises a first metal ring plate, a second metal ring plate, a pleated plastic layer and an elastic metal rod;

[0016] The metal ring plate 1 and the metal ring plate 2 are symmetrically arranged in the vertical direction, the metal ring plate 2 is fixed to the upper end of the supporting cross bar, the upper and lower sides of the pleated plastic layer are respectively fixed to the metal ring plate 1 and the metal ring plate 2, the pleated plastic layer can be compressed and expanded under force, and the coating unit is wrapped in the pleated plastic layer;

[0017] The elastic metal rod is fixed between the first metal ring plate and the second metal ring plate.

[0018] Preferably, the inner and outer walls of the corrugated plastic layer are smoothly arranged, and the elastic metal rod is bent outward in an arc shape.

[0019] Preferably, a placement frame is fixed to the upper end of the metal ring plate 1, the placement frame is arranged in a rectangular shape, and two metal slide bars are slidably arranged on it, and the two metal slide bars are used to place hardware parts.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) The present invention sets a coating unit. When the size of the parts and the size and depth of the inner hole are inconsistent, the metal ball contacts the inner wall of the inner hole when the parts are covered. The coating unit is locally compressed to avoid the contact area being too large to affect the coating effect. At the same time, the metal ball can rotate to minimize the effect of the coating during the coating of the parts.

[0022] (2) The present invention sets the coating unit to be gradually compressed from the upper end. When the coating unit is squeezed, the uppermost end is squeezed first, and the multi-layer step layer is subjected to force at the upper end and gradually compressed from the upper end. The compressed step layer can be relatively close to the inner wall of the inner hole, thereby achieving a better spraying effect. The nozzles of the multi-layer step layer are closer to each other, thereby achieving a better spraying effect. The nozzles of the multi-layer step layer are closer to the inner wall of the inner hole, thereby increasing the impact force and facilitating the coating of the concave and convex parts.

[0023] (3) The present invention sets the lower end of the overlap rod in an inclined surface, and the overlap rod is clamped with the edge of the step layer above it, so that the overlap rod can avoid recovery. When batch coating is applied, it is avoided to squeeze the parts hard to make the step layer of the upper layer move downward. When recovering, the step layer is pulled upward, and the inclined surface of the overlap rod is squeezed with the edge of the step layer to achieve recovery.

[0024] (4) The present invention sets a protection unit, and the parts are directly placed on the upper end of the metal slide rod. The elastic metal rod expands outward under the action of pressure, compressing the wrinkled plastic layer. During spraying, the nozzle is prevented from being partially located on the outside and spraying outward, thereby achieving the role of limited protection. The metal slide rod can slide and adapt to different parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of a half-section structure of a liquid storage frame of the present invention;

[0027] Figure 3 This is a schematic diagram of a half-section structure of a protection unit of the present invention;

[0028] Figure 4 It is a schematic diagram of a partial cross-sectional structure of a coating unit of the present invention;

[0029] Figure 5 For the present invention Figure 4 A is a schematic diagram of the partially enlarged structure of the middle part;

[0030] Figure 6 For the present invention Figure 4 A schematic diagram of the partially enlarged structure of B in the middle;

[0031] Figure 7 It is a schematic diagram of the partial explosion structure of the auxiliary component of the present invention.

[0032] In the figure: 1. metal frame; 2. supporting cross bar; 3. liquid storage frame; 4. protection unit; 41. metal ring plate 1; 42. metal ring plate 2; 43. pleated plastic layer; 44. elastic metal rod; 5. placement frame; 51. metal slide rod; 6. coating unit; 61. annular sheet; 62. step layer; 63. nozzle; 64. annular frame plate; 65. auxiliary component; 651. sleeve rod; 652. sleeve; 653. extrusion block; 654. limit frame plate 1; 655. limit frame plate 2; 656. push rod; 657. overlap rod; 658. frame sleeve; 659. reset spring; 7. straw; 8. power box; 9. limit circle layer; 91. metal ball. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-7 .

[0035] Embodiment 1:

[0036] The present invention provides a technical solution: an inner hole spraying device for hardware products, comprising a metal frame 1, two supporting cross bars 2 are fixed at the upper end of the metal frame 1, a liquid storage frame 3 is provided at the lower end of the supporting cross bars 2, and a coating unit 6 is fixed at the upper end of the supporting cross bars 2;

[0037] The coating unit 6 includes an annular sheet 61 and a multi-layer step layer 62. The annular sheet 61 is fixed to the upper ends of the two supporting cross bars 2. The multi-layer step layer 62 is stacked and sleeved, and the diameter gradually decreases from bottom to top, so that the upper layer can extend into the inner hole of the part.

[0038] A nozzle 63 for spraying is fixed to the upper inclined end of each step layer 62, and a suction pipe 7 is fixed to the lower end of the multi-layer step layer 62. The suction pipe 7 extends from top to bottom to the inside of the liquid storage frame 3. A power box 8 is fixed on the outer wall of the suction pipe 7. The power box 8 has a pump body inside to achieve the adsorption effect.

[0039] The step layer 62 at the lower end is fixed to the annular sheet 61 at the lower end, and a limiting circular layer 9 is fixed on the step layer 62 at the upper end. A metal ball 91 is rotatably installed inside the limiting circular layer 9. The surface of the metal ball 91 is smooth, and one third of it is located at the upper end of the limiting circular layer 9, which reduces the contact area with the parts and achieves better coating.

[0040] An annular frame plate 64 is fixed to the lower end of each step layer 62, and an auxiliary component 65 is provided at the lower end of the annular frame plate 64;

[0041] The auxiliary component 65 includes a sleeve rod 651, a sleeve 652, an extrusion block 653, a limiting frame plate 1 654, a limiting frame plate 2 655, a push rod 656, a overlap rod 657, a frame sleeve 658 and a return spring 659.

[0042] The sleeve rod 651 is supported on the lower end of the upper set of limit frame plate 2 655, the sleeve 652 is sleeved with the sleeve rod 651, and the sleeve 652 has a spring for recovery inside, the extrusion block 653 is fixed to the lower end of the sleeve 652, the limit frame plate 1 654 is fixed to the lower end of the annular frame plate 64, the extrusion block 653 is located in the limit frame plate 1 654 and does not contact the limit frame plate 1 654, the limit frame plate 2 655 is fixed to the annular frame plate 6 4, the push rod 656 is slidably set in the second limit frame plate 655, the inner end of the push rod 656 is matched with the extrusion block 653, the overlap rod 657 is docked with the outer end of the push rod 656, and the overlap rod 657 also slides in the second limit frame plate 655, the frame sleeve 658 is sleeved on the outer end of the overlap rod 657, and the return spring 659 is fixed inside the frame sleeve 658, and the outer end of the frame sleeve 658 is fixed to the corresponding step layer 62.

[0043] The inner end of the push rod 656 is inclined, and the outward side of the extrusion block 653 is also inclined. The extrusion block 653 pushes downward to push the push rod 656 to move outward, and at the same time drives the overlap rod 657 to move outward, so that the overlap rod 657 moves out of the limit frame plate 2 655. The lower end of the overlap rod 657 is inclined.

[0044] The outer end surface of the second limiting frame plate 655 is flush with the outer side of the step layer 62 at its upper end, and when the overlap rod 657 moves out of the second limiting frame plate 655, the step layer 62 at the upper end and the step layer 62 at the lower end can overlap under pressure.

[0045] The part cover is placed on the coating unit 6, and then the coating is sucked upwards by the suction pipe 7, and then the spraying effect is achieved by the nozzle 63, and the inner hole of the part is coated by the spraying effect of the nozzle 63;

[0046] Secondly, since the size of the parts and the size and depth of the inner hole are not consistent, when the parts are covered, the metal ball 91 is in contact with the inner wall of the inner hole, so that the coating unit 6 is partially compressed, and only the metal ball 91 is squeezed with the inner wall of the inner hole to avoid the contact area being too large to affect the coating effect. At the same time, the metal ball 91 can rotate to minimize the effect of coating during the coating of the parts.

[0047] When the coating unit 6 is squeezed, the uppermost end is squeezed first, and the auxiliary component 65 at the uppermost end is stressed, so that the sleeve rod 651 and the sleeve 652 move downward together, so that the extrusion block 653 pushes downward and pushes the push rod 656 forward. The push rod 656 squeezes the overlap rod 657 to move it out of the limit frame plate 655, so that the step layer 62 of the upper layer is not clamped by the overlap rod 657, that is, the step layer 62 of the upper layer moves downward, while the step layer 62 of the lower layer is still clamped by the overlap rod 657, and the push rod 656 of the lower layer needs to squeeze the overlap rod 657. Therefore, the multi-layer step layer 62 is stressed at the upper end and gradually compressed from the upper end, which can make the compressed step layer 62 relatively close to the inner wall of the inner hole, so as to achieve a better spraying effect, and make the nozzles 63 of the multi-layer step layer 62 closer to each other, so as to achieve a better spraying effect, and close to the inner wall of the inner hole, so as to increase the impact force and facilitate the coating of the concave and convex parts.

[0048] Since the lower end of the overlap rod 657 is inclined and the overlap rod 657 is pushed outward by force, the overlap rod 657 is stuck with the edge of the step layer 62 above it, that is, the overlap rod 657 is prevented from recovering. During batch coating, it is avoided to squeeze the parts hard to make the step layer 62 of the upper layer move downward. During subsequent recovery, the step layer 62 is pulled upward, and the inclined surface of the overlap rod 657 is squeezed with the edge of the step layer 62 to achieve recovery.

[0049] Embodiment 2:

[0050] On the basis of the first embodiment, a protection unit 4 is further provided at the upper end of the support crossbar 2, and the protection unit 4 includes a metal ring plate 1 41, a metal ring plate 2 42, a corrugated plastic layer 43 and an elastic metal rod 44;

[0051] The metal ring plate 1 41 and the metal ring plate 2 42 are symmetrically arranged in the up-down direction. The metal ring plate 2 42 is fixed to the upper end of the supporting cross bar 2. The upper and lower sides of the pleated plastic layer 43 are respectively fixed to the metal ring plate 1 41 and the metal ring plate 2 42. The pleated plastic layer 43 can be compressed and expanded under force, and the coating unit 6 is wrapped in the pleated plastic layer 43.

[0052] The elastic metal rod 44 is fixed between the metal ring plate 1 41 and the metal ring plate 2 42 .

[0053] The inner and outer walls of the corrugated plastic layer 43 are smooth, and the elastic metal rod 44 is bent outward in an arc shape.

[0054] A placing frame 5 is fixed to the upper end of the metal ring plate 41. The placing frame 5 is arranged in a rectangular shape, and two metal slide bars 51 are slidably arranged on the placing frame 5. The two metal slide bars 51 are used to place hardware parts.

[0055] The parts are placed directly on the upper end of the metal slide bar 51. By supporting the parts, the elastic metal rod 44 expands outward under the action of pressure, compressing the corrugated plastic layer 43, so that the inner hole of the part can be sprayed while preventing the nozzle 63 from being partially located on the outside and spraying outward, thereby achieving the role of limited protection. Secondly, the metal slide bar 51 can slide to adapt to different parts.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for spraying inner holes of hardware products, comprising a metal frame (1), characterized in that: Two supporting cross bars (2) are fixed to the upper end of the metal frame (1); a liquid storage frame (3) is provided at the lower end of the supporting cross bars (2); and a coating unit (6) is fixed to the upper end of the supporting cross bars (2); The coating unit (6) comprises an annular sheet (61) and a plurality of stepped layers (62), wherein the annular sheet (61) is fixed to the upper ends of two supporting cross bars (2), and the plurality of stepped layers (62) are stacked and sleeved, and the diameters thereof gradually decrease from bottom to top; A nozzle (63) for spraying is fixed to the oblique upper end of each step layer (62), and a suction pipe (7) is fixed to the lower end of multiple step layers (62), and the suction pipe (7) extends from top to bottom to the inside of the liquid storage frame (3). A power box (8) is fixed on the outer wall of the suction pipe (7), and a pump body is provided inside the power box (8).

2. The inner hole spraying device for hardware products according to claim 1 is characterized in that: The step layer (62) at the lower end is fixedly arranged with the annular sheet (61) at the lower end, and a limiting circular layer (9) is fixed on the step layer (62) at the upper end. A metal ball (91) is rotatably mounted inside the limiting circular layer (9). The surface of the metal ball (91) is smooth, and one third of the metal ball (91) is located at the upper end of the limiting circular layer (9).

3. The inner hole spraying device for hardware products according to claim 1 is characterized in that: An annular frame plate (64) is fixed at the lower end of each step layer (62), and an auxiliary component (65) is provided at the lower end of the annular frame plate (64); The auxiliary component (65) comprises a sleeve rod (651), a sleeve (652), an extrusion block (653), a first limiting frame plate (654), a second limiting frame plate (655), a push rod (656), a coincidence rod (657), a frame sleeve (658) and a return spring (659).

4. The inner hole spraying device for hardware products according to claim 3 is characterized in that: The sleeve rod (651) is supported on the lower end of the upper set of limiting frame plates (655); the sleeve (652) is sleeved with the sleeve rod (651), and a spring for restoring is provided inside the sleeve (652); the extrusion block (653) is fixed on the lower end of the sleeve (652); the limiting frame plate (654) is fixed on the lower end of the annular frame plate (64); the extrusion block (653) is located inside the limiting frame plate (654) and does not contact the limiting frame plate (654); the limiting frame plate (655) is fixed on the annular frame plate (64); 4), the push rod (656) is slidably arranged in the second limiting frame plate (655), the inner end of the push rod (656) is matched with the extrusion block (653), the overlap rod (657) is butted with the outer end of the push rod (656), and the overlap rod (657) also slides in the second limiting frame plate (655), the frame sleeve (658) is sleeved on the outer end of the overlap rod (657), and the return spring (659) is fixed inside the frame sleeve (658), and the outer end of the frame sleeve (658) is fixed to the corresponding step layer (62).

5. The inner hole spraying device for hardware products according to claim 4 is characterized in that: The inner end of the push rod (656) is arranged in an inclined surface, and the outward side of the extrusion block (653) is also arranged in an inclined surface. The extrusion block (653) pushes downward to push the push rod (656) to move outward, and at the same time drives the overlap rod (657) to move outward, so that the overlap rod (657) moves out of the second limit frame plate (655). The lower end of the overlap rod (657) is arranged in an inclined surface; The outer end surface of the second limiting frame plate (655) is flush with the outer side of the step layer (62) at its upper end, and when the overlap rod (657) moves out of the second limiting frame plate (655), the step layer (62) at the upper end and the step layer (62) at the lower end can overlap under pressure.

6. The inner hole spraying device for hardware products according to claim 1, characterized in that: A protection unit (4) is also provided at the upper end of the support crossbar (2), and the protection unit (4) comprises a first metal ring plate (41), a second metal ring plate (42), a pleated plastic layer (43) and an elastic metal rod (44); The metal ring plate 1 (41) and the metal ring plate 2 (42) are symmetrically arranged in the up-down direction, the metal ring plate 2 (42) is fixed to the upper end of the supporting cross bar (2), the upper and lower sides of the pleated plastic layer (43) are respectively fixed to the metal ring plate 1 (41) and the metal ring plate 2 (42), the pleated plastic layer (43) can be compressed and expanded under force, and the coating unit (6) is wrapped in the pleated plastic layer (43); The elastic metal rod (44) is fixed between the first metal ring plate (41) and the second metal ring plate (42).

7. The inner hole spraying device for hardware products according to claim 6, characterized in that: The inner and outer walls of the pleated plastic layer (43) are arranged to be smooth, and the elastic metal rod (44) is arranged to be bent outward in an arc shape.

8. The inner hole spraying device for hardware products according to claim 6, characterized in that: A placement frame (5) is fixed to the upper end of the metal ring plate (41). The placement frame (5) is arranged in a rectangular shape and has two metal slide bars (51) slidably arranged thereon. The two metal slide bars (51) are used to place hardware parts.

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