Surface coating equipment for whole diesel engine

Abstract

A surface coating device for a whole diesel engine relates to the technical field of surface spraying and comprises a fixed middle seat and two sliding side seats, the fixed middle seat is respectively provided with a rotary spraying assembly and a convection drying assembly, a longitudinal conveying assembly is arranged below the convection drying assembly, and the two sliding side seats are respectively provided with a surface changing clamping assembly. The problems that when spraying equipment in the prior art is used for spraying the whole diesel engine, the spraying coverage range is small, paint is not dried in time, and spraying face changing operation is inconvenient are solved.

Description

Technical Field

[0001] The invention relates to the technical field of surface spraying, and in particular to a complete surface coating device for a diesel engine. Background Art

[0002] A diesel engine, also known as a diesel engine, is an engine that burns diesel to release energy.

[0003] The basic structure of a traditional diesel engine includes the crank-connecting rod mechanism, valve train, transmission mechanism, fuel supply system, lubrication system, cooling system, and starting system, commonly known as the three major mechanisms and four major systems. The good coordination of these systems and mechanisms is the key to the diesel engine's ability to generate power and output power to the outside.

[0004] Due to the complex working environment of diesel engines, external metal parts exposed to air and oxygen for a long time are prone to oxidation reactions, resulting in rust, which not only affects the overall appearance of the diesel engine, but also reduces the service life of related parts of the diesel engine. Therefore, in the process of manufacturing diesel engines in workshops, an anti-rust link is usually added at the end of the production process, and the main anti-rust method used is surface spraying.

[0005] Regardless of the surface spraying of any component, it needs to be carried out on specific spraying equipment. Different from the surface spraying of single small components, due to the large size and irregular surface of the diesel engine itself, in the process of spraying the whole diesel engine, the clamping mechanism design is often unreasonable, which will cause obstruction to the spraying part during the spraying process, resulting in incomplete spray coverage and affecting the spraying effect; untimely drying of the paint affects the spraying efficiency; and the inability to achieve automatic spraying and changing surfaces, which is extremely inconvenient when using.

[0006] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the invention

[0007] In view of the defects in the prior art, the present invention provides a diesel engine surface coating equipment to solve the problems of small spraying coverage, untimely paint drying and inconvenient spraying surface changing operation when the spraying equipment in the traditional technology is used for spraying the diesel engine.

[0008] To achieve the above object, the present invention provides the following technical solutions: A diesel engine surface coating device comprises a fixed middle seat and two sliding side seats, wherein the fixed middle seat is provided with a rotating spraying assembly and a convection drying assembly, a longitudinal conveying assembly is provided below the convection drying assembly, and the two sliding side seats are provided with a surface changing clamping assembly.

[0009] As an optimized solution, the convection drying component includes two symmetrically arranged door-shaped support plates, the lower ends of the door-shaped support plates are fixedly connected to the fixed middle seat, and a drying box is fixedly connected to the longitudinal outer wall of each of the door-shaped support plates, and a fan impeller and an annular electric heating tube are respectively provided in the drying box.

[0010] As an optimized solution, the rotating spray assembly includes a horizontally arranged supporting bridge plate, which is fixedly supported on two door-shaped supporting plates. A spray box is rotatably provided at the center of the inner top surface of the supporting bridge plate. The spray box is a closed conical box, and a plurality of booster nozzles are fixedly connected to the spray box.

[0011] As an optimized solution, the longitudinal conveying assembly includes a horizontally arranged conveyor belt, and both ends of the conveyor belt respectively pass through the lower openings of the two door-shaped support plates and extend to the outside thereof.

[0012] As an optimized solution, the face-changing clamping assembly includes two symmetrically arranged support vertical plates, which are respectively fixedly connected to the two sliding side seats along the longitudinal direction, and a circular turntable is rotatably provided on the inner end surface of each support vertical plate.

[0013] As an optimized solution, a square positioning block is fixedly connected to the center of the side end face of the circular turntable, two symmetrical positioning clamps are telescopically provided on both longitudinal sides of the square positioning block, and a transfer push plate is telescopically provided on the lateral side end face of the square positioning block.

[0014] As an optimized solution, two symmetrical limit sliding columns are fixedly connected to each lateral side end face of the fixed middle seat, the limit sliding columns extend laterally and the lower ends are grounded, the sliding side seat is clamped on the two parallel limit sliding columns, and the lower surface of the sliding side seat is provided with a limit sliding groove matching the limit sliding column.

[0015] As an optimized solution, a motor mounting opening is opened at the center of the upper surface of the fixed middle seat, and a double-shaft motor is fixed in the motor mounting opening. The two output shaft ends of the double-shaft motor respectively pass through the fixed middle seat and are fixedly connected with laterally extending driving threaded rods, and the two driving threaded rods respectively pass through and are threadedly connected to the corresponding sliding side seats.

[0016] As an optimized solution, the drying box is a cylindrical box with a single-side opening, and an air inlet connected to the drying box is provided on the side wall of the door-shaped support plate. A fan drive motor is fixedly connected to the closed outer end surface of each drying box, and the output shaft end of the fan drive motor extends into the drying box and is fixedly connected to the fan impeller.

[0017] As an optimized solution, a paint box is fixedly connected to one side of the upper surface of the supporting bridge plate. The paint box is a horizontally arranged square box. A supply pump is externally connected to the paint box, and a feeding pipe is fixedly connected to the supply pump.

[0018] As an optimized solution, a vertical connecting pipe is fixedly connected to the upper end surface of the spray box, the upper end of the connecting pipe passes through the supporting bridge plate and is rotatably mounted in the paint box, and an annular enclosure is fixedly connected to the outer peripheral wall of the connecting pipe.

[0019] As an optimized solution, a vertical rotating drive motor is fixedly connected to one side of the upper surface of the supporting bridge plate, the output shaft end of the rotating drive motor passes downward through the supporting bridge plate and is fixedly connected to a horizontal transmission wheel, and a transmission belt is sleeved between the annular enclosure plate and the horizontal transmission wheel.

[0020] As an optimized solution, the longitudinal conveying assembly also includes two symmetrically arranged conveying mounting frames, which are U-shaped frames with their openings facing upward. The two conveying mounting frames are longitudinally arranged on both sides of the fixed middle seat, and two symmetrical lifting and telescopic cylinders are respectively provided under each of the conveying mounting frames. The lower fixed end of the lifting and telescopic cylinder is grounded, and the upper telescopic end of the lifting and telescopic cylinder is fixedly connected to the lower surface of the conveying mounting frame.

[0021] As an optimized solution, a conveying motor is fixedly connected to the transverse outer wall of each conveying mounting frame, the end of the output shaft of the conveying motor passes through the conveying mounting frame and is fixedly connected to a conveying roller, and the conveyor belt is sleeved between the two conveying rollers.

[0022] As an optimized solution, two vertically symmetrical electrically controlled telescopic cylinders are fixedly connected to each longitudinal side end face of the square positioning block, and the telescopic ends of the electrically controlled telescopic cylinders are fixedly connected to the longitudinal inner wall of the positioning clamping plate.

[0023] As an optimized solution, a horizontal telescopic cylinder is fixedly connected to the lateral side end surface of the square positioning block, and the telescopic end of the horizontal telescopic cylinder is fixedly connected to the back side of the transfer push plate.

[0024] As an optimized solution, a steering drive motor is fixedly connected to the transverse outer end surface of each supporting vertical plate, and the output shaft end of the steering drive motor passes through the supporting vertical plate and is fixedly connected to the back side of the circular turntable.

[0025] As an optimized solution, a limiting support ring is provided on the outer side of the circular turntable, and the end of the limiting support ring is fixedly connected to the inner end surface of the supporting vertical plate.

[0026] Compared with the prior art, the present invention has the following beneficial effects: The longitudinal conveying assembly provided in the present invention can realize the longitudinal conveying and lifting and transferring of the diesel engine. Specifically, the longitudinal conveying assembly includes a conveyor belt, the two ends of which are respectively sleeved on two conveying rollers, and the conveying rollers are rotatably mounted on a conveying mounting frame. During the conveying and transferring process, the conveying mounting frame can be lifted and lowered by controlling the lifting and telescopic cylinder to extend and retract, thereby adjusting the conveying height of the diesel engine and transferring it to the face-changing clamping assembly.

[0027] The rotary spraying assembly provided in the present invention can realize rotary spraying on the single-side surface of the diesel engine. Specifically, the rotary spraying assembly includes a rotatably arranged spraying box, the lower end of which is fixedly connected to a plurality of circumferentially arranged boost nozzles, the upper end of which is fixedly connected to a connecting pipe, the upper end of which is rotatably mounted in the paint box and connected thereto; during spraying, the horizontal transmission wheel is driven to rotate by a rotary drive motor, and the torque is transmitted by a transmission belt and annular enclosure, driving the connecting pipe and the spraying box to rotate around the axis as a whole, turning on the boost nozzles, and spraying the surface of the diesel engine; wherein, the rotary spraying method can effectively expand the spraying range, thereby eliminating the dead angle of spraying coverage.

[0028] The convection drying assembly provided in the present invention can perform real-time convection drying on the surface of the diesel engine after spraying. Specifically, the convection drying assembly includes two symmetrically arranged door-shaped support plates, each of which is respectively fixed with a drying box, and a fan impeller and an annular electric heating tube are arranged in the drying box. The fan impeller rotates around the axis under the drive of the fan drive motor, so as to send the air heated by the annular electric heating tube into between the two door-shaped support plates, thereby thermally drying the paint sprayed on the diesel engine, so as to ensure that the paint at the clamping part of the diesel engine has been solidified when the surface is changed and sprayed.

[0029] The face-changing clamping assembly provided in the present invention can clamp and position the diesel engine during the spraying and drying process, and realize the face-changing clamping of the diesel engine through steering cooperation, so as to facilitate the spraying of different sides of the diesel engine. Specifically, the face-changing clamping assembly includes four positioning clamping plates, and the diesel engine can be connected and transferred by respectively performing operations such as retracting, moving and steering the four positioning clamping plates, thereby realizing the switching of different clamping positions, and completing the automatic spraying face-changing of the diesel engine under the premise that the positions of the rotating spraying assembly and the convection drying assembly remain unchanged. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0031] Figure 1It is a schematic cross-sectional view of the internal structure of each component in the present invention in the main viewing direction; Figure 2 It is a partial half-section schematic diagram of each component in the present invention in the top view direction; Figure 3 It is a schematic cross-sectional view of the internal structure of each component in the present invention in the side view direction; Figure 4 It is a schematic diagram of the external overall structure of the present invention in the main viewing direction; Figure 5 It is a schematic diagram of the external overall structure of the present invention in a top view; Figure 6 It is a schematic diagram of the external overall structure of the present invention when viewed from the side.

[0032] In the figure: 1-fixed middle seat, 2-sliding side seat, 3-limiting sliding column, 4-limiting sliding groove, 5-motor installation port, 6-double-output shaft motor, 7-driving threaded rod, 8-door support plate, 9-drying box, 10-air inlet, 11-fan drive motor, 12-fan impeller, 13-annular electric heating pipe, 14-support bridge plate, 15-paint box, 16-supply pump, 17-feeding pipe, 18-spraying box, 19-boosting nozzle, 20-connecting pipe , 21-annular enclosure, 22-rotation drive motor, 23-horizontal transmission wheel, 24-transmission belt, 25-conveying mounting frame, 26-lifting telescopic cylinder, 27-conveying belt, 28-conveying motor, 29-conveying roller, 30-support vertical plate, 31-steering drive motor, 32-circular turntable, 33-limit support ring, 34-square positioning block, 35-positioning splint, 36-electrically controlled telescopic cylinder, 37-horizontal telescopic cylinder, 38-transfer push plate. DETAILED DESCRIPTION

[0033] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0034] like Figures 1 to 6 As shown, a diesel engine surface coating equipment comprises a fixed middle seat 1 and two sliding side seats 2, the fixed middle seat 1 is respectively provided with a rotating spraying component and a convection drying component, a longitudinal conveying component is provided below the convection drying component, and the two sliding side seats 2 are respectively provided with a surface changing clamping component.

[0035] Two symmetrical limit slides 3 are fixedly connected to each lateral side end face of the fixed middle seat 1, and the lower end of the limit slide 3 is grounded. The sliding side seat 2 is clamped on the two parallel limit slides 3, and the lower surface of the sliding side seat 2 is provided with a limit slide groove 4 matching the limit slide 3.

[0036] A motor mounting opening 5 is provided at the center of the upper surface of the fixed intermediate seat 1, and a double-output shaft motor 6 is fixed in the motor mounting opening 5. The two output shaft ends of the double-output shaft motor 6 respectively pass through the fixed intermediate seat 1 and are fixedly connected with laterally extending driving threaded rods 7. The two driving threaded rods 7 respectively pass through and are threadedly connected to the corresponding sliding side seats 2.

[0037] The convection drying assembly includes two symmetrically arranged door-shaped support plates 8, which are arranged on both sides of the motor installation opening 5 in the longitudinal direction, and the lower end of each door-shaped support plate 8 is fixedly connected to the upper surface of the fixed intermediate seat 1.

[0038] A drying box 9 is fixedly connected to the longitudinal outer wall of each door-shaped support plate 8. The drying box 9 is a cylindrical box with a single-side opening. An air inlet 10 connected to the drying box 9 is opened on the side wall of the door-shaped support plate 8. A fan drive motor 11 is fixedly connected to the closed outer end surface of each drying box 9. The output shaft end of the fan drive motor 11 extends to the interior of the drying box 9 and is fixedly connected to a fan impeller 12. An annular electric heating tube 13 is fixedly installed between the fan impeller 12 and the closed inner end surface of the drying box 9.

[0039] The rotary spraying assembly comprises a horizontally arranged supporting bridge plate 14 , and both ends of the supporting bridge plate 14 are fixedly supported on two door-shaped supporting plates 8 respectively.

[0040] A paint box 15 is fixedly connected to one side of the upper surface of the supporting bridge plate 14 . The paint box 15 is a horizontally arranged square box. A supply pump 16 is externally connected to the paint box 15 , and a feeding pipe 17 is fixedly connected to the supply pump 16 .

[0041] A spray box 18 is rotatably provided at the center of the inner top surface of the supporting bridge plate 14 . The spray box 18 is a closed conical box. A plurality of booster nozzles 19 are fixedly connected to the spray box 18 .

[0042] A vertical connecting pipe 20 is fixedly connected to the upper end surface of the spray box 18 . The upper end of the connecting pipe 20 passes through the supporting bridge plate 14 and is rotatably mounted in the paint box 15 . An annular enclosure plate 21 is fixedly connected to the outer peripheral wall of the connecting pipe 20 .

[0043] A vertical rotating drive motor 22 is fixedly connected to one side of the upper surface of the supporting bridge plate 14 . The output shaft end of the rotating drive motor 22 passes downward through the supporting bridge plate 14 and is fixedly connected to a horizontal transmission wheel 23 . A transmission belt 24 is sleeved between the annular enclosure 21 and the horizontal transmission wheel 23 .

[0044] The longitudinal conveying assembly includes two symmetrically arranged conveying mounting frames 25, which are U-shaped frames with their openings facing upward. The two conveying mounting frames 25 are longitudinally arranged on both sides of the fixed middle seat 1, and two symmetrical lifting and telescopic cylinders 26 are respectively provided under each conveying mounting frame 25. The lower fixed end of the lifting and telescopic cylinder 26 is grounded, and the upper telescopic end of the lifting and telescopic cylinder 26 is fixedly connected to the lower surface of the conveying mounting frame 25.

[0045] The longitudinal conveying assembly further comprises a horizontally arranged conveying belt 27, both ends of which respectively pass through the lower openings of the two door-shaped support plates 8 and extend to the outside thereof.

[0046] A conveying motor 28 is fixedly connected to the transverse outer wall of each conveying mounting frame 25 . The end of the output shaft of the conveying motor 28 passes through the conveying mounting frame 25 and is fixedly connected to a conveying roller 29 . The conveying belt 27 is sleeved between two conveying rollers 29 .

[0047] The face-changing clamping assembly includes two symmetrically arranged support vertical plates 30, which are respectively fixedly connected to the two sliding side seats 2 along the longitudinal direction. A steering drive motor 31 is respectively fixedly connected to the lateral outer end face of each support vertical plate 30. The end of the output shaft of the steering drive motor 31 passes through the support vertical plate 30 and is fixedly connected to a circular turntable 32. A limit support ring 33 is provided on the outer side of the circular turntable 32, and the end of the limit support ring 33 is fixedly connected to the inner end face of the support vertical plate 30.

[0048] A square positioning block 34 is fixedly connected to the center of the side end surface of the circular turntable 32 . Two symmetrical positioning clamping plates 35 are respectively telescopically provided on both longitudinal sides of the square positioning block 34 . The ends of the positioning clamping plates 35 extend to the bottom of the supporting bridge plate 14 .

[0049] Two vertically symmetrical electrically controlled telescopic cylinders 36 are fixedly connected to each longitudinal side end face of the square positioning block 34 , and the telescopic ends of the electrically controlled telescopic cylinders 36 are fixedly connected to the inner side wall of the positioning clamping plate 35 .

[0050] A horizontal telescopic cylinder 37 is fixedly connected to the lateral side end surface of the square positioning block 34 , and a transfer push plate 38 is fixedly connected to the telescopic end of the horizontal telescopic cylinder 37 .

[0051] When the present invention is in use: first, the diesel engine to be sprayed is placed flat on the conveyor belt 27, and the conveying motor 28 is started. The conveying motor 28 drives the conveying roller 29 to rotate, and then drives the conveyor belt 27 to roll in a circle, so as to transfer the diesel engine longitudinally to the bottom of the supporting bridge plate 14; the lifting and telescopic cylinder 26 is controlled to extend, and the two conveying mounting frames 25 are driven to move up, so as to lift the diesel engine as a whole; in the initial state, the four positioning clamps 35 are all in a vertical state, and the double-output shaft motor 6 is started. The double-output shaft motor 6 drives the two driving threaded rods 7 to rotate, and respectively controls the two sliding side seats 2 to slide sideways, and moves two of the positioning clamps 35 to the two sides of the diesel engine, and the other two positioning clamps 35 to The outer side of the door-shaped support plate 8 is turned to avoid; the electronically controlled telescopic cylinder 36 is controlled to shorten, and the two positioning clamps 35 are driven to move in opposite directions to clamp and position the diesel engine, and then the lifting and telescopic cylinder 26 is controlled to shorten to reset the conveyor belt 27; the supply pump 16 is turned on, and the spray paint is injected into the paint box 15 along the feeding pipe 17 and the supply pump 16, and the paint flows into the spray box 18 through the connecting pipe 20, and the rotating drive motor 22 is started at the same time, and the rotating drive motor 22 drives the horizontal transmission wheel 23 to rotate, and the torque is transmitted by the transmission belt 24 and the annular enclosure 21, so as to drive the connecting pipe 20 and the spray box 18 to rotate around the axis as a whole, and the supercharger nozzle 19 is turned on to spray the surface of the diesel engine; After the single-side spraying is completed, the steering drive motor 31 is started, and the steering drive motor 31 drives the circular turntable 32 to rotate, so that the clamped diesel engine is turned 180°, and the surface spraying on the other side is carried out; after the surface spraying on both sides is completed, the circular turntable 32 is controlled to rotate 90°, so that the two sides of the diesel engine sprayed with paint face the two air inlets 10, and the fan drive motor 11 is started, and the fan drive motor 11 drives the fan impeller 12 to rotate, and the air heated by the annular electric heating tube 13 is blown into the air inlet 10, and the paint on the surface of the diesel engine is convection dried; after drying, the two positioning clamps 35 clamped with the diesel engine are in a horizontal state, and are moved to the other two positioning clamps on the outside. The plate 35 is in a vertical state, and the double-output shaft motor 6 is started again to control the sliding side seat 2 to move back until the other two positioning clamps 35 are moved to the longitudinal sides of the diesel engine; the two horizontal telescopic cylinders 37 are controlled to be extended and retracted, and the two transfer push plates 38 are used to push the diesel engine located between the two horizontal positioning clamps 35 to between the two vertical positioning clamps 35, and the diesel engine is clamped and positioned by controlling the extension and retraction of the electronically controlled telescopic cylinder 36, and the two horizontal positioning clamps 35 are moved out laterally to achieve surface change clamping; then the above-mentioned spraying and drying operations are repeated until the four sides of the diesel engine are completely sprayed; finally, the diesel engine that has completed spraying is transferred to the conveyor belt 27 and transported out longitudinally.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A diesel engine surface coating equipment, characterized in that: It comprises a fixed middle seat (1) and two sliding side seats (2), wherein the fixed middle seat (1) is provided with a rotating spraying assembly and a convection drying assembly, a longitudinal conveying assembly is provided below the convection drying assembly, and the two sliding side seats (2) are provided with a surface changing clamping assembly; The convection drying assembly comprises two symmetrically arranged door-shaped support plates (8), the lower ends of the door-shaped support plates (8) being fixedly connected to the fixed intermediate seat (1), and a drying box (9) being fixedly connected to the longitudinal outer wall of each door-shaped support plate (8), and a fan impeller (12) and an annular electric heating pipe (13) being respectively arranged in the drying box (9); The rotary spraying assembly comprises a horizontally arranged support bridge plate (14), the support bridge plate (14) being fixedly supported on two door-shaped support plates (8), a spraying box (18) being rotatably arranged at the center of the inner top surface of the support bridge plate (14), the spraying box (18) being a closed conical box, and a plurality of booster spray heads (19) being fixedly connected to the spraying box (18); The longitudinal conveying assembly comprises a horizontally arranged conveying belt (27), the two ends of the conveying belt (27) respectively passing through the lower openings of the two door-shaped support plates (8) and extending to the outside thereof; The face-changing clamping assembly comprises two symmetrically arranged support vertical plates (30), the two support vertical plates (30) being respectively fixedly connected to the two sliding side seats (2) along the longitudinal direction, and a circular rotating disk (32) is rotatably provided on the inner end surface of each support vertical plate (30); A square positioning block (34) is fixedly connected at the center of the side end surface of the circular rotating disk (32), two symmetrical positioning clamping plates (35) are telescopically provided on both longitudinal sides of the square positioning block (34), and a transfer push plate (38) is telescopically provided on the lateral side end surface of the square positioning block (34).

2. The diesel engine surface coating equipment according to claim 1, characterized in that: Two symmetrical limit slides (3) are fixedly connected to each lateral side end face of the fixed middle seat (1), the limit slides (3) extend laterally and the lower ends are grounded, the sliding side seat (2) is clamped on the two parallel limit slides (3), and the lower surface of the sliding side seat (2) is provided with limit slide grooves (4) matching the limit slides (3).

3. The diesel engine surface coating equipment according to claim 1, characterized in that: A motor mounting opening (5) is provided at the center of the upper surface of the fixed intermediate seat (1), a double-shaft motor (6) is fixed in the motor mounting opening (5), two output shaft ends of the double-shaft motor (6) respectively pass through the fixed intermediate seat (1) and are fixedly connected to laterally extending drive threaded rods (7), and the two drive threaded rods (7) respectively pass through and are threadedly connected to the corresponding sliding side seats (2).

4. The diesel engine surface coating equipment according to claim 1, characterized in that: The drying box (9) is a cylindrical box with a single-side opening. An air inlet (10) connected to the drying box (9) is provided on the side wall of the door-shaped support plate (8). A fan drive motor (11) is fixedly connected to the closed outer end surface of each drying box (9). The output shaft end of the fan drive motor (11) extends into the drying box (9) and is fixedly connected to the fan impeller (12).

5. The diesel engine surface coating equipment according to claim 1 is characterized in that: A paint box (15) is fixedly connected to one side of the upper surface of the supporting bridge plate (14); the paint box (15) is a horizontally arranged square box; the paint box (15) is externally connected to a supply pump (16); and a feeding pipe (17) is fixedly connected to the supply pump (16); A vertical connecting pipe (20) is fixedly connected to the upper end surface of the spray box (18); the upper end of the connecting pipe (20) passes through the supporting bridge plate (14) and is rotatably mounted in the paint box (15); an annular enclosure plate (21) is fixedly connected to the outer peripheral wall of the connecting pipe (20); A vertical rotary drive motor (22) is fixedly connected to one side of the upper surface of the support bridge plate (14); a distal end of an output shaft of the rotary drive motor (22) passes downward through the support bridge plate (14) and is fixedly connected to a horizontal transmission wheel (23); a transmission belt (24) is sleeved between the annular enclosure plate (21) and the horizontal transmission wheel (23).

6. The diesel engine surface coating equipment according to claim 1, characterized in that: The longitudinal conveying assembly further comprises two symmetrically arranged conveying mounting frames (25), wherein the conveying mounting frames (25) are U-shaped frames with their openings facing upwards, and the two conveying mounting frames (25) are longitudinally arranged on both sides of the fixed intermediate seat (1), and two symmetrical lifting and telescopic cylinders (26) are respectively arranged below each of the conveying mounting frames (25), wherein the lower fixed end of the lifting and telescopic cylinder (26) is grounded, and the upper telescopic end of the lifting and telescopic cylinder (26) is fixedly connected to the lower surface of the conveying mounting frame (25); A conveying motor (28) is fixedly connected to the transverse outer wall of each conveying mounting frame (25), the output shaft end of the conveying motor (28) passes through the conveying mounting frame (25) and is fixedly connected to a conveying roller (29), and the conveying belt (27) is sleeved between two conveying rollers (29).

7. The diesel engine surface coating equipment according to claim 1 is characterized in that: Two vertically symmetrical electrically controlled telescopic cylinders (36) are respectively fixedly connected to each longitudinal side end face of the square positioning block (34), and the telescopic ends of the electrically controlled telescopic cylinders (36) are fixedly connected to the longitudinal inner wall of the positioning clamping plate (35); A horizontal telescopic cylinder (37) is fixedly connected to the lateral side end surface of the square positioning block (34), and the telescopic end of the horizontal telescopic cylinder (37) is fixedly connected to the back side of the transfer push plate (38).

8. The diesel engine surface coating equipment according to claim 7 is characterized in that: A steering drive motor (31) is fixedly connected to the transverse outer end surface of each of the supporting vertical plates (30), and the output shaft end of the steering drive motor (31) passes through the supporting vertical plates (30) and is fixedly connected to the back side of the circular turntable (32); A position limiting support ring (33) is provided on the outer side of the circular rotating disk (32), and the end of the position limiting support ring (33) is fixedly connected to the inner end surface of the supporting vertical plate (30).

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