A spraying device for steering knuckle products

Abstract

The present invention discloses a spraying device for a steering knuckle product, and relates to the field of spraying technology. The spraying device for the steering knuckle product comprises: a rotating device, which is configured to be connected to a connecting hole on the steering knuckle and rotate with the steering knuckle, and the bottom of the rotating device is connected to the upper surface of a base plate; a connecting device, which is configured to abut against the inner wall of the steering knuckle and form a clamping part; a sealing device, which is configured to clamp with the connecting device and seal the connecting hole on the spraying surface of the steering knuckle through the expansion of gas, and the sealing device is connected to the fan through an air inlet pipe. The spraying device for the steering knuckle product constructs a connecting platform through the connecting device, completes the support of the steering knuckle, the sealing of the connecting hole, and the shielding near the connecting hole through the sealing device, and rotates the steering knuckle to another station through the rotating device to complete the coating of both sides of the steering knuckle.

Description

Technical Field

[0001] The invention relates to the technical field of spraying, and in particular to a spraying device for a steering knuckle product. Background Art

[0002] The steering knuckle spraying device is a special equipment used for spraying the steering knuckle of the automobile.

[0003] In the known prior art, before spraying the steering knuckle, it is necessary to first fix the steering knuckle, seal the connecting holes, and shield the area near the connecting holes. This can prevent paint from entering the connecting holes or adhering to the area near the connecting holes, thereby maintaining the functionality of the connecting holes, facilitating the installation and removal of bolts, preventing paint from corroding the connecting holes, and facilitating the inspection and maintenance of the connecting holes.

[0004] However, there are many connecting holes on the steering knuckle, and the obstruction near the connecting holes must be considered. The workload before spraying the steering knuckle is large, and the steering knuckle is mostly fixed horizontally and is not easy to disassemble. It is necessary to spray one side first and then fix the steering knuckle before spraying the other side, which prolongs the spraying time interval and reduces work efficiency. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a spraying device for a steering knuckle product, which constructs a connecting platform through a connecting device, supports the steering knuckle, closes the connecting holes, and shields the area near the connecting holes through a sealing device, and rotates the steering knuckle to another workstation through a rotating device to complete the painting on both sides of the steering knuckle.

[0006] Technical solution: To achieve the above objectives, the present invention is implemented through the following technical solution: A spraying device for a steering knuckle product, comprising: a base plate, the top of the base plate is connected to a spray head through a mechanical arm, and a fan is connected to the edge of the base plate.

[0007] The rotating device is arranged to be connected with the connecting hole on the steering knuckle and rotate with the steering knuckle, and the bottom of the rotating device is connected with the upper surface of the bottom plate.

[0008] The connecting device is arranged to abut against the inner wall of the steering knuckle and form a clamping portion.

[0009] The sealing device is configured to be engaged with the connecting device and to seal the connecting hole on the sprayed surface of the steering knuckle through the expansion of gas. The sealing device is connected to the fan through an air inlet pipe.

[0010] Preferably, the mechanical arm, rotating device, connecting device and sealing device form a group of auxiliary devices, and there are two groups of auxiliary devices. The first group of auxiliary devices is used to spray one side of the steering knuckle, and the second group of auxiliary devices is used to spray the other side of the steering knuckle. The bottom of the first group of auxiliary devices is connected to the bottom plate through the second support plate, and the second group of auxiliary devices is connected to the bottom plate through the first support plate. The first group of auxiliary devices is located at the first station, and the second group of auxiliary devices is located at the second station. The first station reaches the second station after rotating 180° clockwise. The mechanical arm on the first station is located on the outside of the steering knuckle, and the sealing device on the first station is located on the inside of the steering knuckle. The mechanical arm on the second station is located on the inside of the steering knuckle, and the sealing device on the second station is located on the outside of the steering knuckle.

[0011] Preferably, the rotating device includes: a bidirectional motor, the bottom of the bidirectional motor is connected to the top of the base plate, the bidirectional motor rotates 180° each time, the rotating part of the bidirectional motor is connected to the connecting plate through a rotating shaft, the end of the connecting plate away from the rotating shaft is connected to a second hydraulic cylinder, the telescopic end of the second hydraulic cylinder is connected to a shift rod through a piston rod, the side surface of the lower part of the shift rod is connected to a cross plate, the shift rod is clamped with a connecting hole on the steering knuckle, the steering knuckle is placed on the cross plate, and the diameter of the piston rod is larger than the diameter of the shift rod.

[0012] Preferably, the connecting device includes: a fixed plate, the fixed plate is located above the bottom plate, the inner wall of the fixed plate is connected to a first hydraulic cylinder, the telescopic part of the first hydraulic cylinder is connected to a push plate, a plurality of first friction grooves are penetrated at the edge of the outer side of the fixed plate, and the plurality of first friction grooves are equidistantly distributed in the circumferential direction of the fixed plate, a crimping plate is provided on one side of the fixed plate, a plurality of second friction grooves are penetrated at the edge of the outer side of the crimping plate, and the plurality of second friction grooves are equidistantly distributed in the circumferential direction of the crimping plate, a pressing groove is provided in the middle of the inner wall of the crimping plate, the push plate is adapted to the pressing groove, grooves are provided at both ends of the fixed plate and the crimping plate, a spring is provided at the end close to the fixed plate and the crimping plate, the bottom of the groove on the fixed plate is connected to the bottom of the groove on the crimping plate through the spring, and a card groove is penetrated at the top of the crimping plate and the fixed plate.

[0013] Preferably, the fixing plate and the crimping plate are both shaped like semicircular rings, and are symmetrically distributed along the axis of the virtual member. The thickness of the fixing plate is the same as the depth of the connecting hole in the middle of the steering knuckle, and the crimping plate is configured to abut against the inner wall of the steering knuckle under pressure.

[0014] Preferably, the sealing device includes: a third hydraulic cylinder, the fixed part of the third hydraulic cylinder is connected to the top of the base plate through the second support plate, the telescopic end of the third hydraulic cylinder is connected to an air equalizing box, the side of the air equalizing box away from the third hydraulic rod is connected to a plurality of seals, the side of the air equalizing box away from the third hydraulic rod is connected to two clamping plates, and the clamping plates are clamped in the clamping slots.

[0015] Preferably, the number of the sealing members is the same as the number of the connecting holes on the steering knuckle, and each sealing member is adapted to one connecting hole.

[0016] Preferably, the sealing member comprises: a cylinder, wherein a side of the cylinder close to the third hydraulic cylinder is connected to a side of the air equalizing box far from the third hydraulic cylinder, a side of the cylinder far from the third hydraulic cylinder is connected to a telescopic box, a diameter of the telescopic box after expansion is larger than a diameter of the cylinder after expansion, a top wall of the telescopic box is connected to a bottom wall of the air equalizing box through a shaping rod, the telescopic box and the cylinder are both made of elastic material, and the shaping rod is made of metal.

[0017] Beneficial effects: The present invention provides a spraying device for a steering knuckle product. Compared with the prior art, the present invention has the following beneficial effects: 1. The steering knuckle is placed vertically, a connecting platform is constructed by a connecting device, the support of the steering knuckle and the sealing of the connecting hole and the shielding near the connecting hole are completed by a sealing device, the steering knuckle is rotated to another station by a rotating device, and the coating of the other side of the steering knuckle is completed. The fixing of the steering knuckle, the sealing of the connecting hole and the shielding near the connecting hole are completed synchronously, rather than in steps, which shortens the time interval between spraying on both sides of the steering knuckle and improves work efficiency.

[0018] 2. The cylinder and the telescopic box are made of elastic materials (rubber or plastic, etc.). When the cylinder and the telescopic box expand, the cylinder abuts against the inner wall of the connecting hole, and all the connecting holes are closed at one time to prevent paint from entering the connecting holes and preventing paint from penetrating into the thread gap, thereby reducing the risk of thread wear and damage.

[0019] 3. The telescopic box is fully unfolded. The telescopic box is in the shape of a round pancake. It is used to shield the connection hole near the spray surface of the steering knuckle to prevent the connection hole from being painted, avoid covering up potential cracks, wear or other signs of damage near the connection hole, reduce the difficulty of inspection and maintenance, and reduce the difficulty of bolt installation and removal.

[0020] 4. The shaping rod is a metal rod with high hardness and is not easy to deform, so that the entire seal is approximately a straight line segment, which is convenient for the seal to pass through the connection hole. The sealing device is not on the same side of the nozzle, the sealing device will not occupy the working space of the nozzle, and the sealing device will not hinder the spraying work on one side of the steering knuckle.

[0021] 5. The crimping plate and the fixing plate form a clamping part, which is convenient for fixing the steering knuckle, sealing the connecting hole, and shielding and protecting the spraying surface of the connecting hole accessories before spraying one side of the steering knuckle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present application and, together with the description, further serve to explain the principles of the present application and enable those skilled in the relevant art to make and use the present application.

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the structure of the present invention.

[0025] Figure 2 for Figure 1 Schematic diagram of the structure after removing the cabinet.

[0026] Figure 3 for Figure 2 Schematic diagram of the structure after removing the bottom plate and part of the structure.

[0027] Figure 4 It is a schematic diagram of the structures of the connecting device, the rotating device and the sealing device.

[0028] Figure 5 This is a separation diagram of the connecting device and the steering knuckle.

[0029] Figure 6 A schematic diagram of the structure of the connecting device.

[0030] Figure 7 It is a structural schematic diagram of the rotating device.

[0031] Figure 8 This is an exploded view of the sealing device.

[0032] Fig. 9 Exploded view of the seal.

[0033] The accompanying drawings are marked as follows: 1 cabinet, 21 bottom plate, 22 first support plate, 23 second support plate, 24 mechanical arm, 25 nozzle, 26 steering knuckle, 3 connecting device, 31 fixing plate, 32 groove, 33 card slot, 34 first friction groove, 35 crimping plate, 36 spring, 37 second friction groove, 38 first hydraulic cylinder, 39 push plate, 4 rotating device, 41 bidirectional motor, 42 rotating shaft, 43 connecting plate, 44 second hydraulic cylinder, 45 piston rod, 46 shift rod, 47 cross plate, 5 sealing device, 51 third hydraulic cylinder, 52 air equalizing box, 53 card plate, 54 sealing member, 541 cylinder, 542 shaping rod, 543 telescopic box, 61 fan, 62 air inlet pipe.

[0034] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are 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.

[0036] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] Reference Figure 1 - Fig. 9 A spraying device for a steering knuckle product includes: a bottom plate 21, a top of the bottom plate 21 is connected to a spray head 25 through a mechanical arm 24, and a fan 61 is connected to the edge of the bottom plate 21.

[0038] The rotating device 4 is configured to be connected to the connecting hole on the steering knuckle 26 and rotate with the steering knuckle 26. The bottom of the rotating device 4 is connected to the upper surface of the base plate 21. The rotating device 4 includes: a bidirectional motor 41. The bottom of the bidirectional motor 41 is connected to the top of the base plate 21. The bidirectional motor 41 rotates 180° each time. The rotating part of the bidirectional motor 41 is connected to the connecting plate 43 through a rotating shaft 42. The end of the connecting plate 43 away from the rotating shaft 42 is connected to a second hydraulic cylinder 44. The telescopic end of the second hydraulic cylinder 44 is connected to a shift rod 46 through a piston rod 45. The side surface of the lower part of the shift rod 46 is connected to a cross plate 47. The shift rod 46 is clamped with a connecting hole on the steering knuckle 26. The steering knuckle 26 is placed on the cross plate 47. The diameter of the piston rod 45 is larger than the diameter of the shift rod 46.

[0039] The connecting device 3 is configured to abut against the inner wall of the steering knuckle 26 and form a clamping portion, and the connecting device 3 includes: a fixed plate 31, the fixed plate 31 is located above the bottom plate 21, the inner wall of the fixed plate 31 is connected to a first hydraulic cylinder 38, the telescopic portion of the first hydraulic cylinder 38 is connected to a push plate 39, a plurality of first friction grooves 34 are penetrated through the edge of the outer side of the fixed plate 31, and the plurality of first friction grooves 34 are equidistantly distributed in the circumferential direction of the fixed plate 31, a crimping plate 35 is provided on one side of the fixed plate 31, a plurality of second friction grooves 37 are penetrated through the edge of the outer side of the crimping plate 35, and the plurality of second friction grooves 37 are equidistantly distributed in the circumferential direction of the crimping plate 35, and the crimping plate 35 is provided with a plurality of second friction grooves 37. A pressing groove is provided in the middle of the inner wall of the plate 35, and the push plate 39 is adapted to the pressing groove. Grooves 32 are provided at both ends of the fixed plate 31 and the crimping plate 35. A spring 36 is provided at the end close to the fixed plate 31 and the crimping plate 35. The bottom of the groove 32 on the fixed plate 31 is connected to the bottom of the groove 32 on the crimping plate 35 through the spring 36. A slot 33 is provided through the top of the crimping plate 35 and the fixed plate 31. The fixed plate 31 and the crimping plate 35 are both shaped like semicircular rings. The fixed plate 31 and the crimping plate 35 are symmetrically distributed along the axis of the virtual member. The thickness of the fixed plate 31 is the same as the depth of the connecting hole in the middle of the steering knuckle 26. The crimping plate 35 is configured to abut against the inner wall of the steering knuckle 26 under pressure.

[0040] The sealing device 5 is configured to be engaged with the connecting device 3 and to seal the connecting hole on the spraying surface of the steering knuckle 26 through the gas expansion effect. The sealing device 5 is connected to the fan 61 through the air inlet pipe 62. The sealing device 5 includes: a third hydraulic cylinder 51, the fixing part of the third hydraulic cylinder 51 is connected to the top of the bottom plate 21 through the second support plate 23, the telescopic end of the third hydraulic cylinder 51 is connected to an air distribution box 52, and the side of the air distribution box 52 away from the third hydraulic rod is connected to a plurality of sealing members 54, and the side of the air distribution box 52 away from the third hydraulic rod is connected to two clamping plates 53, and the clamping plates 53 are engaged with the clamping groove 33. The sealing members 54 are The number is the same as the number of connecting holes on the steering knuckle 26, and each sealing member 54 is adapted to a connecting hole. The sealing member 54 comprises: a cylinder 541, wherein the side of the cylinder 541 close to the third hydraulic cylinder 51 is connected to the side of the air equalizing box 52 far from the third hydraulic cylinder 51, and the side of the cylinder 541 far from the third hydraulic cylinder 51 is connected to a telescopic box 543, and the diameter of the telescopic box 543 after expansion is larger than the diameter of the cylinder 541 after expansion, and the top wall of the telescopic box 543 is connected to the bottom wall of the air equalizing box 52 through a shaping rod 542, and the telescopic box 543 and the cylinder 541 are both made of elastic materials, and the shaping rod 542 is made of metal.

[0041] The mechanical arm 24, the rotating device 4, the connecting device 3, and the sealing device 5 form a group of auxiliary devices. There are two groups of auxiliary devices. The first group of auxiliary devices is used to spray one side of the steering knuckle 26, and the second group of auxiliary devices is used to spray the other side of the steering knuckle 26. The bottom of the first group of auxiliary devices is connected to the bottom plate 21 through the second supporting plate 23, and the second group of auxiliary devices is connected to the bottom plate 21 through the first supporting plate 22. The first group of auxiliary devices is located at the first station, and the second group of auxiliary devices is located at the second station. The first station rotates 180° clockwise to reach the second station. The mechanical arm 24 on the first station is located on the outside of the steering knuckle 26, and the sealing device 5 on the first station is located on the inside of the steering knuckle 26. The mechanical arm 24 on the second station is located on the inside of the steering knuckle 26, and the sealing device 5 on the second station is located on the outside of the steering knuckle 26.

[0042] When in use, put the steering knuckle 26 into the cabinet 1, start the second hydraulic cylinder 44, and the telescopic end of the second hydraulic cylinder 44 moves up with the piston rod 45 and the shift rod 46 in turn. The top of the shift rod 46 passes through a connecting hole of the steering knuckle 26, and the cross plate 47 contacts the bottom of the steering knuckle 26 and supports the steering knuckle 26. At this time, the steering knuckle 26 is located in the first station, and the first auxiliary device is located around the steering knuckle 26. The mechanical arm 24 on the first station is located on the outside of the steering knuckle 26, and the sealing device 5 on the first station is located on the inside of the steering knuckle 26. Then put the fixing plate 31 and the crimping plate 35 into the steering knuckle. 26, so that one side of the fixing plate 31, one side of the crimping plate 35 and one side of the steering knuckle 26 are located in the same plane, the first hydraulic cylinder 38 is started, and the telescopic end of the first hydraulic cylinder 38 extends into the pressing groove with the push plate 39, the push plate 39 pushes the crimping plate 35, the spring 36 is stretched, and the crimping plate 35 is close to the hole wall in the middle of the steering knuckle 26 and tightly abuts against it, and a clamping part is formed by the crimping plate 35 and the fixing plate 31 as a whole, and before spraying one side of the steering knuckle 26 later, it is convenient to fix the steering knuckle 26, seal the connecting hole, and shield and protect the sprayed surface of the connecting hole accessories.

[0043] A first friction groove 34 and a second friction groove 37 are respectively provided at the edges of the fixing plate 31 and the crimping plate 35, and the directions of the first friction groove 34 and the second friction groove 37 are different, thereby improving the anti-slip ability of the fixing plate 31 and the crimping plate 35 as a whole in different directions, so that the connecting device 3 remains stable during normal operation.

[0044] The third hydraulic cylinder 51 is started, and the telescopic end of the third hydraulic cylinder 51 moves with the air equalizing box 52, the seal 54, and the card plate 53 toward the side close to the nozzle 25 (the nozzle 25 closest to the third hydraulic cylinder 51) in sequence. The card plate 53 is engaged with the card slot 33, and the card plate 53 supports the entire connection device 3 and the steering knuckle 26. A seal 54 is adapted to a connection hole on the steering knuckle 26, and the number of seals 54 is the same as the number of connection holes. The seal 54 passes through the connection hole and stops moving. At this time, the cylinder 541 is located in the connection hole, and the telescopic box 543 just completely extends out of the connection hole. The shaping rod 542 is a metal rod, and the shaping rod 542 has high hardness and is not easy to deform, so that the entire seal 54 is approximately a straight line segment, which is convenient for the seal 54 to pass through the connection hole. The sealing device 5 is not on the same side of the nozzle 25, the sealing device 5 will not occupy the working space of the nozzle 25, and the sealing device 5 will not hinder the spraying work on one side of the steering knuckle 26.

[0045] Start the fan 61, and the wind enters the seal 54 through the air inlet pipe 62 and the air equalization box 52 in turn. The gas in the cylinder 541 and the telescopic box 543 increases, and the cylinder 541 and the telescopic box 543 are made of elastic materials (rubber or plastic, etc.). The cylinder 541 and the telescopic box 543 expand, and the cylinder 541 abuts against the inner wall of the connecting hole, so that all the connecting holes are sealed at one time to prevent paint from entering the connecting holes and preventing paint from penetrating into the thread gap, thereby reducing the risk of thread wear and damage. Although paint can protect metal surfaces from corrosion in some cases, painting near connecting holes may be counterproductive. Certain components in the paint may react chemically with the metal in the threaded hole, causing corrosion and damage. In addition, if the paint layer is damaged or peeled off, it may also accelerate the corrosion process of the threaded hole.

[0046] The telescopic box 543 is fully unfolded and is in the shape of a round pancake. The telescopic box 543 is used to shield the vicinity of the connection hole of the spray surface of the steering knuckle 26 to prevent the vicinity of the connection hole from being painted, avoid covering up potential cracks, wear or other signs of damage near the connection hole, reduce the difficulty of inspection and maintenance, and reduce the difficulty of bolt installation and removal.

[0047] When one side of the steering knuckle 26 is painted, there is no need to perform tedious disassembly work. Just turn off the fan 61 and the third hydraulic cylinder 51, pull the seal 54 and the clamping plate 53 out of the connecting hole and the clamping slot 33 respectively, start the bidirectional motor 41, and the bidirectional motor 41 rotates the steering knuckle 26 and the connecting device 3 180° clockwise (the angle can be flexibly adjusted according to the actual working environment on site), and the steering knuckle 26 moves from the first station to the second station. At this time, the steering knuckle 26 is surrounded by a second group of auxiliary devices (not shown), the mechanical arm 24 on the second station is located on the inner side of the steering knuckle 26, and the sealing device 5 on the second station is located on the outer side of the steering knuckle 26. At this time, the connection hole of the steering knuckle 26 and the vicinity of the connection hole on the coating side of the steering knuckle 26 are blocked, thereby completing the spraying work on the other side of the steering knuckle 26.

[0048] During the whole process, the steering knuckle 26 is placed vertically, a connecting platform is constructed by the connecting device 3, the sealing device 5 completes the support of the steering knuckle 26 and the sealing of the connecting hole and the shielding near the connecting hole, and the steering knuckle 26 is rotated to another workstation by the rotating device 4 to complete the painting of the other side of the steering knuckle 26. The fixing of the steering knuckle 26, the sealing of the connecting hole and the shielding near the connecting hole are completed simultaneously instead of in steps, thereby shortening the time interval between spraying on both sides of the steering knuckle 26 and improving work efficiency.

[0049] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A spraying device for a steering knuckle product, characterized in that: include: A bottom plate (21), the top of the bottom plate (21) being connected to a nozzle (25) via a mechanical arm (24), and the edge of the bottom plate (21) being connected to a fan (61); A rotating device (4) is configured to be connected to a connecting hole on the steering knuckle (26) and to rotate with the steering knuckle (26), wherein the bottom of the rotating device (4) is connected to the upper surface of the bottom plate (21); The connecting device (3) is arranged to abut against the inner wall of the steering knuckle (26) and form a clamping portion; A sealing device (5) is configured to be engaged with the connecting device (3) and to seal the connecting hole on the sprayed surface of the steering knuckle (26) through the action of gas expansion, wherein the sealing device (5) is connected to the fan (61) through an air inlet pipe (62); The mechanical arm (24), the rotating device (4), the connecting device (3), and the sealing device (5) form a group of auxiliary devices, and there are two groups of auxiliary devices in total. The first group of auxiliary devices is used to spray one side of the steering knuckle (26), and the second group of auxiliary devices is used to spray the other side of the steering knuckle (26). The bottom of the first group of auxiliary devices is connected to the bottom plate (21) via a second support plate (23), and the second group of auxiliary devices is connected to the bottom plate (21) via a first support plate (22). The first group of auxiliary devices is located at a first workstation, and the second group of auxiliary devices is located at a second workstation. The steering knuckle (26) at the first workstation rotates 180° clockwise to reach the second workstation. The rotating device (4) comprises: a bidirectional motor (41), the bottom of the bidirectional motor (41) is connected to the top of the bottom plate (21), the bidirectional motor (41) rotates 180 degrees each time, the rotating part of the bidirectional motor (41) is connected to the connecting plate (43) via a rotating shaft (42), the end of the connecting plate (43) away from the rotating shaft (42) is connected to a second hydraulic cylinder (44), the telescopic end of the second hydraulic cylinder (44) is connected to a shift rod (46) via a piston rod (45), the side surface of the lower part of the shift rod (46) is connected to a transverse plate (47), the shift rod (46) is clamped with a connecting hole on the steering knuckle (26), the steering knuckle (26) is placed on the transverse plate (47), and the diameter of the piston rod (45) is larger than the diameter of the shift rod (46); The connecting device (3) comprises: a fixing plate (31), the fixing plate (31) being located above the bottom plate (21), the inner wall of the fixing plate (31) being connected to a first hydraulic cylinder (38), the telescopic portion of the first hydraulic cylinder (38) being connected to a push plate (39), a plurality of first friction grooves (34) being provided through the outer edge of the fixing plate (31), the plurality of first friction grooves (34) being distributed at equal intervals in the circumferential direction of the fixing plate (31), a pressing plate (35) being provided on one side of the fixing plate (31), a plurality of second friction grooves (37) being provided through the outer edge of the pressing plate (35) , a plurality of the second friction grooves (37) are equidistantly distributed in the circumferential direction of the crimping plate (35), a pressing groove is provided in the middle of the inner wall of the crimping plate (35), the push plate (39) is adapted to the pressing groove, grooves (32) are provided at both ends of the fixed plate (31) and the crimping plate (35), a spring (36) is provided at one end of the fixed plate (31) close to the crimping plate (35), the bottom of the groove (32) on the fixed plate (31) is connected to the bottom of the groove (32) on the crimping plate (35) through the spring (36), and a clamping groove (33) is provided through the top of the crimping plate (35) and the fixed plate (31); The sealing device (5) comprises: a third hydraulic cylinder (51), a fixed portion of the third hydraulic cylinder (51) being connected to the top of the bottom plate (21) via a second support plate (23), a telescopic end of the third hydraulic cylinder (51) being connected to an air distribution box (52), a side of the air distribution box (52) away from the third hydraulic rod being connected to a plurality of sealing members (54), a side of the air distribution box (52) away from the third hydraulic rod being connected to two clamping plates (53), and the clamping plates (53) being clamped to the clamping grooves (33); The sealing member (54) comprises: a cylinder (541); a side of the cylinder (541) close to the third hydraulic cylinder (51) is connected to a side of the air equalizing box (52) far from the third hydraulic cylinder (51); a side of the cylinder (541) far from the third hydraulic cylinder (51) is connected to a telescopic box (543); a diameter of the telescopic box (543) after expansion is larger than a diameter of the cylinder (541) after expansion; a top wall of the telescopic box (543) is connected to a bottom wall of the air equalizing box (52) via a shaping rod (542); the telescopic box (543) and the cylinder (541) are both made of elastic material, and the shaping rod (542) is made of metal.

2. The spraying device for steering knuckle products according to claim 1, characterized in that: The fixing plate (31) and the crimping plate (35) are both shaped like semicircular rings. The fixing plate (31) and the crimping plate (35) are symmetrically distributed along the axis of the virtual circle. The thickness of the fixing plate (31) is the same as the depth of the connecting hole in the middle of the steering knuckle (26). The crimping plate (35) is arranged to abut against the inner wall of the steering knuckle (26) under pressure.

3. The spraying device for steering knuckle products according to claim 1, characterized in that: The number of the sealing members (54) is the same as the number of the connecting holes on the steering knuckle (26), and each sealing member (54) is adapted to one connecting hole.

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