CN115846088A - Even paint spraying apparatus of machine parts - Google Patents

Abstract

The invention relates to a paint spraying device, in particular to a uniform paint spraying device for mechanical parts. The invention provides a uniform paint spraying device for mechanical parts, which can enable the mechanical parts to rotate and be uniformly sprayed with paint, prevent paint from gathering and improve the paint spraying effect. The utility model provides an even paint spraying apparatus of machine parts, is including casing, transparent plate and storage cylinder etc, and the casing leading flank left side upper portion rotary type be connected with the transparent plate, and fixed cross-under has the storage cylinder in the middle of the casing top. According to the invention, the transparent plate is opened, the mechanical parts are clamped and fixed through the clamping frame, the positioning frame is pushed to reset, so that the mechanical parts move into the shell, the spray nozzle is started to spray paint on the mechanical parts, the servo motor is started to drive the screw rod to rotate forwards, the rack drives the column gear to rotate, the clamping frame drives the mechanical parts to rotate, the paint is comprehensively and uniformly sprayed, and the paint can be prevented from being accumulated on the mechanical parts due to the rotating centrifugal force, so that the paint spraying effect is improved.

Description

Even paint spraying apparatus of machine parts

Technical Field

The invention relates to a paint spraying device, in particular to a uniform paint spraying device for mechanical parts.

Background

In the machining process of the mechanical parts, in order to ensure the quality of subsequent use of the mechanical parts, the mechanical parts need to be subjected to paint spraying treatment, and the paint spraying treatment can prevent the mechanical parts from being oxidized and corroded.

Chinese patent publication No. CN112588504A discloses a surface painting apparatus for processing parts, comprising a painting room, wherein mounting plates are slidably arranged on two sides of the bottom of an inner cavity of the painting room, and the mounting plates are driven by a first hydraulic cylinder arranged in the painting room to slide; the clamping mechanism is rotatably arranged on the mounting plate; the paint spraying mechanism comprises a paint spraying cavity arranged inside the paint spraying chamber and a spray head arranged at the bottom of the paint spraying cavity; the mounting plate is provided with an intermittent rotating mechanism connected with the clamping mechanism to drive the clamping mechanism to rotate intermittently; still be equipped with the reciprocating motion mechanism who drives the chamber reciprocating motion that sprays paint in the spray booth, above-mentioned patent is though can evenly spray paint to mechanical parts, nevertheless because paint has certain mobility, and mechanical parts motionlessness, and paint gathers easily and leads to the unevenness of spraying paint in mechanical parts bottom, influences the effect of spraying paint.

The invention aims to solve the problems in the patent, and provides a uniform paint spraying device for mechanical parts, which can enable the mechanical parts to rotate and be uniformly sprayed with paint, prevent paint from gathering and improve the paint spraying effect.

Disclosure of Invention

In order to overcome the defects that the paint is easy to gather at the bottom of the mechanical part to cause uneven paint spraying and influence the paint spraying effect because the paint has certain fluidity and the mechanical part is still, the paint can be uniformly sprayed on the mechanical part, the invention provides the uniform paint spraying device for the mechanical part, which can enable the mechanical part to rotate to be uniformly sprayed with paint, prevent the paint from gathering and improve the paint spraying effect.

The invention is realized by the following technical approaches:

the utility model provides an even paint spraying apparatus of machine parts, which comprises a housin, the shower nozzle, the transparent plate, fixture block and storage cylinder, being connected with the transparent plate of casing leading flank left side upper portion rotary type, fixed cross-under has the storage cylinder in the middle of the casing top, storage cylinder bottom intercommunication has and is used for painting spun shower nozzle, the bottom rigid coupling has the fixture block in the casing, still including fixture and slewing mechanism, be provided with on the fixture block and be used for pressing from both sides the fixture of tight fixed with machine parts, be provided with on the casing and be used for driving fixture pivoted slewing mechanism.

Further, the clamping mechanism comprises a positioning frame, clamping frames, first springs, sliding plates and spline shaft sleeves, the positioning frame is connected between the left side and the right side of the clamping block in a sliding mode, three spline shaft sleeves penetrate through the upper portions of the left side and the right side of the positioning frame in an evenly spaced rotary mode, the clamping frames used for clamping and fixing mechanical parts are connected to the inner sides of all sliding modes in a penetrating mode, the sliding plates are sleeved on the inner sides of all the six clamping frames in a rotary mode, and the first springs sleeved on the clamping frames are connected between the outer side faces of all the six sliding plates and the inner sides of the positioning frame.

The rotating mechanism comprises a fixed frame, a sliding frame, a rack, a servo motor, a screw rod, a guide rod and a column gear, wherein the column gear is fixedly sleeved outside six spline shaft sleeves, the fixed frame is fixedly connected in the middle of the lower portion of the outer rear side face of the shell, the guide rod is fixedly connected between the left side and the right side of the upper portion of the fixed frame and the front side of the top of the clamping block, the sliding frame is sleeved between the guide rods on the left side and the right side in a sliding mode, the rack used for driving the column gear to rotate is fixedly connected to the front side of the sliding frame in a bilateral symmetry mode on the front side of the sliding frame, the rack corresponds to the column gear, the screw rod used for driving the sliding frame to move is connected in a penetrating mode in the middle of the fixed frame in a rotating mode in the middle of the fixed frame, the servo motor is fixedly connected to the middle of the front side of the inner bottom of the shell, and the end portion of an output shaft of the servo motor is fixedly connected with the front end of the screw rod.

Further explanation, still including being used for scraping the material mechanism of scraping that the paint that gathers on the machine parts strikes off, scrape material mechanism including the contact frame, the stand, the second spring with scrape the work or material rest, fixture block top rear side bilateral symmetry rigid coupling has the stand, the cover of slidingtype between the left and right sides stand is equipped with and is used for scraping the smooth material frame of scraping of paint on the machine parts, scrape between work or material rest bottom rear side and the fixture block top rear side bilateral symmetry and be connected with the second spring of suit on the stand, it has the contact frame to scrape work or material rest bottom rear side bilateral symmetry rigid coupling, the carriage moves forward and contacts with the contact frame.

The paint scraping device further comprises a scraping roller, wherein three scraping rollers used for flattening paint on mechanical parts are connected to the scraping frame in a rotating mode at uniform intervals.

Further explanation, still including being used for taking away the mechanism of bleeding of collecting with the coating cloud in the casing, the mechanism of bleeding is including the fan, driving motor, protective housing and collecting vessel, the rigid coupling has the collecting vessel that is used for collecting the coating cloud in the middle of the outer trailing flank upper portion of casing, the fixed fan that has worn to connect on casing trailing flank upper portion and is used for taking the coating cloud in the casing out, the end of giving vent to anger of fan and the feed end fixed connection and the intercommunication of collecting vessel, fan leading flank middle part rigid coupling has driving motor, driving motor's output shaft tip and the axle front end fixed connection of fan, fan leading flank middle part rigid coupling has the protective housing that is used for protecting driving motor, driving motor is located the protective housing.

Further explanation, still including being used for carrying out the collection mechanism of collecting to the paint that drops, collect the mechanism including slider and collection frame, the slidingtype slider that is connected with of bilateral symmetry in the middle of the fixture block top, the rigid coupling has the collection frame that is used for collecting the paint between the left and right sides slider top.

The positioning frame is characterized by further comprising a power-assisted mechanism for guiding the positioning frame, wherein the power-assisted mechanism comprises an installation shaft and a power-assisted wheel, the left side and the right side of the bottom of the positioning frame are connected with the installation shaft in a front-back symmetrical rotating mode, the four installation shafts are fixedly sleeved with power-assisted wheels for guiding the positioning frame, and the power-assisted wheels are in contact with the bottom in the shell.

The invention has the remarkable improvements that:

1. open the transparent plate, rethread supporting frame presss from both sides tight fixedly with mechanical parts, promote the locating rack again and reset and make mechanical parts remove to the casing in, start the shower nozzle and spout paint on mechanical parts, start servo motor simultaneously and drive the lead screw corotation, just also make the rack drive the column gear and rotate, the supporting frame then drives mechanical parts and rotates and evenly spray paint comprehensively, and because pivoted centrifugal force, can prevent that paint from gathering to influence the effect of spraying paint on mechanical parts, thereby improve the effect of spraying paint.

2. Under the effect of scraping material mechanism, when the holding frame drives mechanical parts and rotates and evenly sprays paint, scrape the paint that material mechanism can strike off the gathering, and can also flatten the paint on the mechanical parts, so, can further strike off the paint of gathering on the mechanical parts, improve the effect of spraying paint.

3. Under the effect of mechanism of bleeding, every time mechanical parts is painted the completion back, the mechanism operation of bleeding can take away the collection with the coating cloud in the casing, can prevent that the coating cloud in the casing from waving the health that influences personnel on every side to guarantee personnel's safety on every side.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a partial sectional structural schematic diagram of the present invention.

Fig. 3 is a schematic perspective view of the showerhead of the present invention.

Fig. 4 is a partial sectional structural schematic view of the clamping mechanism of the present invention.

Fig. 5 is a schematic perspective view of the positioning frame of the present invention.

Fig. 6 is a partial sectional structural schematic view of the rotating mechanism of the present invention.

Fig. 7 is a partial sectional structural schematic view of the scraping mechanism of the invention.

Fig. 8 is a schematic perspective view of the scraper plate of the present invention.

FIG. 9 is a schematic view of the suction mechanism of the present invention in partial cross-section.

Fig. 10 is a schematic perspective view of a portion of the collection mechanism of the present invention.

Fig. 11 is a partial perspective view of the power assist mechanism of the present invention.

Reference numbers in the drawings: 1: a housing, 2: head, 21: transparent plate, 22: a clamping block, 3: storage cylinder, 4: clamping mechanism, 41: positioning frame, 42: holder, 43: first spring, 44: sliding plate, 45: spline shaft sleeve, 5: rotating mechanism, 51: mount, 52: carriage, 53: rack, 54: servo motor, 55: screw rod, 56: guide rod, 58: column gear, 6: scraping mechanism, 61: contact frame, 62: column, 63: second spring, 64: scrape the work or material rest, 65: scraping roller, 7: air extraction mechanism, 71: fan, 72: drive motor, 73: protective shell, 74: collecting cylinder, 8: collection mechanism, 81: slider, 82: collection frame, 9: power assist mechanism, 91: mounting shaft, 92: an auxiliary wheel.

Detailed Description

The present invention will be further described with reference to specific examples, which are illustrative of the invention and are not to be construed as limiting the invention.

Example 1

The utility model provides an even paint spraying apparatus of machine parts, including casing 1, shower nozzle 2, transparent plate 21, fixture block 22, storage cylinder 3, fixture 4 and slewing mechanism 5, please refer to fig. 1-6, the rotary type is connected with transparent plate 21 on 1 leading flank left side upper portion of casing 1, storage cylinder 3 has been worn to connect in the middle of the fixed top of casing 1, 3 bottom intercommunications of storage cylinder have shower nozzle 2, when shower nozzle 2 starts, shower nozzle 2 can realize spouting paint, fixture block 22 is installed through welded connection's mode to the bottom in the casing 1, be provided with fixture 4 on the fixture block 22, fixture 4 can realize pressing from both sides tight fixedly with machine parts, be provided with slewing mechanism 5 on the casing 1, when slewing mechanism 5 functions, slewing mechanism 5 can realize driving fixture 4 rotations.

The clamping mechanism 4 includes a positioning frame 41, a clamping frame 42, a first spring 43, a sliding plate 44 and spline shaft sleeves 45, referring to fig. 1, fig. 2, fig. 4 and fig. 5, the positioning frame 41 is slidably connected between the left and right sides of the clamping block 22, three spline shaft sleeves 45 are rotatably connected to the upper portions of the left and right sides of the positioning frame 41 at uniform intervals, the clamping frame 42 is slidably connected to the inner side of each spline shaft sleeve 45, the clamping frame 42 can clamp and fix mechanical parts, the sliding plates 44 are rotatably sleeved on the inner sides of six clamping frames 42, and the first spring 43 sleeved on the clamping frame 42 is connected between the outer side surfaces of the six sliding plates 44 and the inner side of the positioning frame 41.

The rotating mechanism 5 includes a fixing frame 51, a sliding frame 52, a rack 53, a servo motor 54, a lead screw 55, a guide rod 56 and a column gear 58, please refer to fig. 1, fig. 2 and fig. 6, the outer sides of six spline shaft sleeves 45 are fixedly sleeved with the column gear 58, the middle of the lower portion of the outer rear side of the housing 1 is provided with the fixing frame 51 by welding, the guide rod 56 is fixedly connected between the left side and the right side of the upper portion of the fixing frame 51 and the front side of the top of the clamping block 22, the sliding frame 52 is slidably sleeved between the guide rods 56 on the left side and the right side, the rack 53 is fixedly connected to the front side of the sliding frame 52 in a bilateral symmetry manner, the rack 53 corresponds to the column gear 58, when the rack 53 moves, the rack 53 can drive the column gear 58 to rotate, the lead screw 55 is rotatably connected in the middle of the fixing frame 51 in a penetrating manner, the lead screw 55 is in threaded connection with the lower portion of the sliding frame 52, when the lead screw 55 rotates, the 55 can drive the sliding frame 52 to move, the middle of the front side of the bottom of the housing 1 is provided with the servo motor 54 by bolting, and the end portion of the output shaft of the servo motor 54 is fixedly connected to the front of the lead screw 55.

Firstly, adding a proper amount of paint into a storage barrel 3, enabling the paint to be in contact with a spray head 2, pulling a transparent plate 21 to swing forwards and open, pulling a positioning frame 41 to move forwards to drive a clamping frame 42 to move forwards through a spline shaft sleeve 45 after the transparent plate 21 is opened, stopping pulling the positioning frame 41 to move forwards when the clamping frame 42 moves forwards to the outside of a shell 1, pulling left and right clamping frames 42 to move outwards, driving left and right sliding plates 44 to move outwards when the left and right clamping frames 42 move outwards, compressing a first spring 43, moving three mechanical parts between the left and right clamping frames 42, loosening the left and right clamping frames 42, driving the left and right sliding plates 42 to move inwards under the action of the first spring 43, moving the left and right clamping frames 42 inwards to clamp and fix the mechanical parts, and pushing the positioning frame 41 to move backwards to reset, the clamping frame 42 drives the mechanical parts to move backwards into the shell 1, then the transparent plate 21 is pulled to swing backwards and close, the spray head 2 is started, the spray head 2 sprays paint in the storage cylinder 3, the paint is sprayed on the mechanical parts, the servo motor 54 is started again to drive the screw rod 55 to rotate forwards, the screw rod 55 rotates forwards to drive the sliding frame 52 to move forwards, the sliding frame 52 moves forwards to drive the rack 53 to move forwards, the rack 53 moves forwards to be meshed with the column gear 58, the rack 53 drives the column gear 58 to rotate forwards, the column gear 58 rotates forwards to drive the clamping frame 42 to rotate forwards through the spline shaft sleeve 45, the clamping frame 42 rotates forwards to drive the mechanical parts to rotate forwards, the mechanical parts rotate forwards to be sprayed with paint comprehensively and uniformly, due to the rotating centrifugal force, the paint can be prevented from being accumulated on the mechanical parts to influence the paint spraying effect, so that the paint spraying effect is improved, when the rack 53 moves forwards to the maximum stroke, starting the servo motor 54 to drive the screw rod 55 to rotate reversely, so that the sliding frame 52 drives the rack 53 to move backwards and reset, the rack 53 moves backwards to drive the column gear 58 to rotate reversely, the clamping frame 42 also drives the mechanical parts to rotate reversely and continue to be painted comprehensively, the rack 53 resets and is separated from the column gear 58, the column gear 58 stops driving the clamping frame 42 to rotate reversely through the spline shaft sleeve 45, the clamping frame 42 stops driving the mechanical parts to rotate reversely, the servo motor 54 is closed, the spray head 2 stops spraying the paint, the transparent plate 21 is pulled to swing forwards again and is opened, then the positioning frame 41 is pulled to move forwards so that the mechanical parts move out of the shell 1, the mechanical parts are taken down from the clamping frame 42 after painting is finished, and the process is repeated, and the mechanical parts can be painted comprehensively and uniformly.

Example 2

On the basis of embodiment 1, the material scraping device further comprises a material scraping mechanism 6, the material scraping mechanism 6 comprises a contact frame 61, an upright post 62, a second spring 63, a material scraping frame 64 and a material scraping roller 65, please refer to fig. 2, fig. 7 and fig. 8, the upright post 62 is fixedly connected to the rear side of the top of the fixture block 22 in a bilateral symmetry manner, the material scraping frame 64 is sleeved between the upright posts 62 on the left side and the right side in a sliding manner, when the mechanical part rotates, the material scraping frame 64 can scrape and flatten paint on the mechanical part, the material scraping frame 64 is rotatably connected with three material scraping rollers 65 at uniform intervals, when the material scraping rollers 65 rotate, the material scraping rollers 65 can flatten paint on the mechanical part, the second springs 63 sleeved on the upright posts 62 are connected between the rear side of the bottom of the material scraping frame 64 and the rear side of the top of the fixture block 22 in a bilateral symmetry manner, the contact frames 61 are installed in a bilateral symmetry manner by welding manner on the rear sides of the bottom of the material scraping frame 64, and the sliding frame 52 moves forward to contact the contact frame 61.

The paint mist collecting device further comprises an air extracting mechanism 7, the air extracting mechanism 7 comprises a fan 71, a driving motor 72, a protective shell 73 and a collecting cylinder 74, please refer to fig. 1, fig. 2 and fig. 9, the collecting cylinder 74 is installed in the middle of the upper portion of the outer rear side surface of the shell 1 in a welding connection mode, the collecting cylinder 74 can collect paint mist, the fan 71 is fixedly connected to the upper portion of the rear side of the shell 1 in a penetrating mode, when the fan 71 rotates, the fan 71 can extract the paint mist in the shell 1, an air outlet end of the fan 71 is fixedly connected and communicated with a feed end of the collecting cylinder 74, the driving motor 72 is fixedly connected to the middle of the front side surface of the fan 71, an output shaft end of the driving motor 72 is fixedly connected with a shaft front end of the fan 71, the protective shell 73 is fixedly connected to the middle of the front side surface of the fan 71, the driving motor 72 is located in the protective shell 73, and the protective shell 73 can protect the driving motor 72.

When the servo motor 54 starts to rotate forward, the sliding frame 52 moves forward to drive the rack 53 to move forward, so that the clamping frame 42 drives the mechanical parts to rotate to perform overall and uniform paint spraying, when the sliding frame 52 moves forward to contact with the contact frame 61, the sliding frame 52 drives the contact frame 61 to move upward, the contact frame 61 moves upward to drive the scraping frame 64 to move upward, the second spring 63 is stretched, the scraping frame 64 moves upward to drive the scraping roller 65 to move upward, the scraping frame 64 moves upward to contact with the paint on the mechanical parts, meanwhile, the scraping roller 65 also contacts with the paint on the mechanical parts, the scraping frame 64 scrapes the paint gathered on the mechanical parts, and meanwhile, the scraping roller 65 flattens the paint on the mechanical parts. When the servo motor 54 starts to rotate reversely, the sliding frame 52 moves backwards and resets to drive the rack 53 to move backwards and reset, the sliding frame 52 resets to be separated from the contact frame 61, and the scraping frame 64 moves downwards and resets to drive the scraping roller 65 to move downwards and reset under the action of the second spring 63. Therefore, paint gathered on the mechanical parts can be further scraped, and the paint spraying effect is improved.

After the mechanical parts are painted, the driving motor 72 is started, the driving motor 72 drives the fan 71 to rotate, the fan 71 rotates to pump the paint mist in the shell 1 into the collecting cylinder 74, after the paint mist in the shell 1 is completely pumped, the driving motor 72 is closed, the driving motor 72 stops driving the fan 71 to rotate, the transparent plate 21 is pulled to swing forwards to open to take out the mechanical parts, and then the paint in the collecting cylinder 74 is subjected to subsequent treatment. Therefore, the paint mist in the shell 1 can be prevented from floating to affect the health of surrounding personnel, and the safety of the surrounding personnel is ensured.

Example 3

On the basis of the embodiment 1 and the embodiment 2, the paint collecting device further comprises a collecting mechanism 8, the collecting mechanism 8 comprises a sliding block 81 and a collecting frame 82, please refer to fig. 2 and fig. 10, the sliding block 81 is connected in the middle of the top of the clamping block 22 in a sliding manner, the sliding blocks 81 are symmetrically connected in the left-right direction, the collecting frame 82 is fixedly connected between the tops of the sliding blocks 81 on the left side and the right side, and when the paint drops, the collecting frame 82 can collect the paint.

The positioning device further comprises an assisting mechanism 9, the assisting mechanism 9 comprises mounting shafts 91 and assisting wheels 92, please refer to fig. 2 and 11, the left side and the right side of the bottom of the positioning frame 41 are connected with the mounting shafts 91 in a front-back symmetrical rotating manner, the assisting wheels 92 are fixedly sleeved on the four mounting shafts 91, the assisting wheels 92 are in contact with the bottom inside the shell 1, and the assisting wheels 92 can guide the positioning frame 41.

When the scraper frame 64 scrapes off paint accumulated on the mechanical parts, the scraped paint drops into the collection frame 82. When a proper amount of paint is filled in the collecting frame 82, the collecting frame 82 is pulled to move forwards to drive the sliding block 81 to be separated from the fixture block 22, the paint in the collecting frame 82 is poured out, after all the paint is poured out, the collecting frame 82 is moved to enable the sliding block 81 to be in contact with the fixture block 22, and then the collecting frame 82 is pushed to move backwards to reset. So, it is more convenient to collect the processing to the paint that drops.

When the positioning frame 41 moves forward, the positioning frame 41 drives the driving wheel 92 to move forward through the mounting shaft 91, and the driving wheel 92 moves forward to guide the positioning frame 41. Thus, the positioning frame 41 can move more smoothly and stably.

Finally, it is necessary to state that: the above-mentioned contents are only used to help understanding the technical solution of the present invention, and should not be interpreted as limiting the scope of the present invention; insubstantial modifications and adaptations of the invention, as viewed by a person with ordinary skill in the art in light of the above teachings, are intended to be within the scope of the invention as claimed.

Claims (8)

1. The utility model provides an even paint spraying apparatus of machine parts, including casing (1), shower nozzle (2), transparent plate (21), fixture block (22) and storage cylinder (3), be connected with transparent plate (21) of casing (1) leading flank left side upper portion rotary type, fixed the wearing has been connected with storage cylinder (3) in the middle of casing (1) top, storage cylinder (3) bottom intercommunication has and is used for painting spun shower nozzle (2), the bottom rigid coupling has fixture block (22) in casing (1), characterized by, still including fixture (4) and slewing mechanism (5), be provided with on fixture block (22) and be used for pressing from both sides fixed fixture (4) with machine parts clamp, be provided with on casing (1) and be used for driving fixture (4) pivoted slewing mechanism (5).

2. The device for uniformly spraying paint on mechanical parts according to claim 1, wherein the clamping mechanism (4) comprises a positioning frame (41), a clamping frame (42), a first spring (43), a sliding plate (44) and spline shaft sleeves (45), the positioning frame (41) is connected between the left side and the right side of the clamping block (22) in a sliding manner, the three spline shaft sleeves (45) are connected to the upper parts of the left side and the right side of the positioning frame (41) in a rotating manner at uniform intervals in a penetrating manner, the clamping frame (42) used for clamping and fixing the mechanical parts is connected to the inner side of each spline shaft sleeve (45) in a sliding manner in a penetrating manner, the sliding plates (44) are sleeved on the inner sides of the six clamping frames (42) in a rotating manner, and the first springs (43) sleeved on the clamping frames (42) are connected between the outer side surfaces of the six sliding plates (44) and the inner side of the positioning frame (41).

3. The uniform paint spraying device for mechanical parts as claimed in claim 2, wherein the rotating mechanism (5) comprises a fixed frame (51), a sliding frame (52), a rack (53), a servo motor (54), a lead screw (55), guide rods (56) and a column gear (58), the column gear (58) is fixedly sleeved on the outer sides of six spline shaft sleeves (45), the fixed frame (51) is fixedly connected to the middle of the lower portion of the outer rear side surface of the housing (1), the guide rods (56) are fixedly connected between the left side and the right side of the upper portion of the fixed frame (51) and the front side of the top of the clamping block (22), the sliding frame (52) is slidably sleeved between the guide rods (56) on the left side and the right side, the rack (53) for driving the column gear (58) to rotate is fixedly connected to the front side of the sliding frame (52), the rack (53) corresponds to the column gear (58), the lead screw (55) for driving the sliding frame (52) to move is rotatably connected to the middle of the fixed frame (51) in a penetrating manner, the lower portion of the sliding frame (52) is in a threaded manner, the servo motor (54) is fixedly connected to the middle of the front side of the inner bottom of the housing (1), and the output shaft of the servo motor (54) is fixedly connected to the front end portion of the lead screw (55).

4. The device for uniformly spraying paint on mechanical parts according to claim 3, further comprising a scraping mechanism (6) for scraping off paint accumulated on the mechanical parts, wherein the scraping mechanism (6) comprises a contact frame (61), an upright post (62), a second spring (63) and a scraping frame (64), the upright posts (62) are fixedly connected to the rear side of the top of the clamping block (22) in a bilateral symmetry manner, the scraping frame (64) for scraping the paint on the mechanical parts smoothly is slidably sleeved between the upright posts (62) on the left side and the right side, the second spring (63) sleeved on the upright post (62) is symmetrically connected between the rear side of the bottom of the scraping frame (64) and the rear side of the top of the clamping block (22) in a bilateral symmetry manner, the contact frame (61) is fixedly connected to the rear side of the bottom of the scraping frame (64) in a bilateral symmetry manner, and the sliding frame (52) moves forwards to be in contact with the contact frame (61).

5. The device for evenly spraying paint on mechanical parts as claimed in claim 4, further comprising a scraping roller (65), wherein three scraping rollers (65) for flattening paint on the mechanical parts are rotatably connected to the scraping rack (64) at even intervals.

6. The uniform paint spraying device for the mechanical parts as claimed in claim 5, characterized by further comprising an air extraction mechanism (7) for extracting and collecting paint mist in the shell (1), wherein the air extraction mechanism (7) comprises a fan (71), a driving motor (72), a protective shell (73) and a collecting cylinder (74), the collecting cylinder (74) for collecting the paint mist is fixedly connected to the middle of the upper portion of the outer rear side of the shell (1), the fan (71) for extracting the paint mist in the shell (1) is fixedly connected to the upper portion of the rear side of the shell (1) in a penetrating manner, an air outlet end of the fan (71) is fixedly connected and communicated with a feed end of the collecting cylinder (74), the driving motor (72) is fixedly connected to the middle of the front side of the fan (71), an end of an output shaft of the driving motor (72) is fixedly connected to the front end of the fan (71), the protective shell (73) for protecting the driving motor (72) is fixedly connected to the middle of the front side of the fan (71), and the driving motor (72) is located in the protective shell (73).

7. The device for uniformly spraying paint on mechanical parts according to claim 6, further comprising a collecting mechanism (8) for collecting the dropped paint, wherein the collecting mechanism (8) comprises a sliding block (81) and a collecting frame (82), the sliding block (81) is connected to the middle of the top of the clamping block (22) in a sliding manner in a bilateral symmetry manner, and the collecting frame (82) for collecting the paint is fixedly connected between the tops of the sliding blocks (81) at the left side and the right side.

8. The device for uniformly spraying paint to mechanical parts according to claim 7, further comprising an assisting mechanism (9) for guiding the positioning frame (41), wherein the assisting mechanism (9) comprises an installation shaft (91) and an assisting wheel (92), the installation shaft (91) is connected to the left side and the right side of the bottom of the positioning frame (41) in a front-back symmetric rotation mode, the assisting wheel (92) for guiding the positioning frame (41) is fixedly sleeved on each of the four installation shafts (91), and the assisting wheel (92) is in contact with the bottom in the shell (1).

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