Positioning and clamping device for knuckle production

Abstract

This invention relates to the field of automotive parts manufacturing and processing technology, and particularly to a steering knuckle production positioning and clamping device. This invention provides a steering knuckle production positioning and clamping device that does not interfere with painting while simultaneously positioning and clamping the steering knuckle. The device includes a support frame and a paint gun. The paint gun is mounted in the middle of the support frame. It also includes a support plate and a placement frame. The support plate is connected to the lower front side of the support frame, and the placement frame is rotatably connected to the upper part of the support plate. The steering knuckle is placed on the placement frame. A cylinder drives a pressure plate, a sliding sleeve, and a rotating ring to move downwards. The rotating ring, in conjunction with the placement frame, clamps the steering knuckle, placing it on a limiting plate. The pressure plate drives a sleeve rod to move downwards and contact a push block. The sleeve rod pushes the push block downwards, and the push rod drives the limiting plate to move outwards, positioning and limiting the steering knuckle. The inner wall and middle of the steering knuckle do not need painting, thus not affecting the painting process.

Description

Technical Field

[0001] This invention relates to the field of automotive parts manufacturing and processing technology, and in particular to a steering knuckle production positioning and clamping device. Background Technology

[0002] The steering knuckle is one of the important components of a car's steering axle. It enables the car to drive stably and transmits driving direction sensitively. The function of the steering knuckle is to transmit and bear the load of the front of the car, support and drive the front wheels to rotate around the kingpin, thereby steering the car. In the manufacturing process of the steering knuckle, a final painting stage is required. When painting the steering knuckle, a fixture is needed to fix it in place.

[0003] Patent publication number CN215318226U discloses an automotive steering knuckle positioning and clamping device, including a base plate. The top of the base plate is provided with a protective shell. The protective shell is provided with a positioning mechanism. The positioning mechanism includes a motor, a screw, a bearing, a positioning slider, a limiting block, and a limiting groove. The motor is fixedly installed on both sides of the protective shell. The output end of the motor is connected to the screw via a coupling. The other end of the screw is fixedly connected to the inside of the bearing. The surface of the screw is threadedly connected to the positioning slider. The bottom of the positioning slider is fixed to the limiting block via a connecting rod.

[0004] The aforementioned device, through the use of components such as a positioning mechanism, performs a positioning function during the clamping of the steering knuckle. However, the components of this device that clamp the steering knuckle are fixed at the painting position of the steering knuckle, thus affecting the painting process and requiring a second painting of the steering knuckle to complete the manufacturing process. How to design a steering knuckle production positioning and clamping device that can clamp and position the steering knuckle without affecting the painting process is the technical problem that this patent aims to solve. Summary of the Invention

[0005] To overcome the drawback of existing technology where the clamping components of the steering knuckle are fixed at the painting position of the steering knuckle, thus affecting the painting process and requiring a second painting of the steering knuckle to complete the processing, the technical problem is to provide a steering knuckle production positioning and clamping device that can position and clamp the steering knuckle without affecting the painting process.

[0006] The technical solution is as follows: A steering knuckle production positioning and clamping device includes a support frame and a paint gun. The paint gun is installed in the middle of the support frame. It also includes a motor, a support plate, a placement frame, a clamping mechanism, and a limiting mechanism. The support plate is connected to the lower front side of the support frame. The placement frame is rotatably connected to the upper part of the support plate. The steering knuckle is placed on the placement frame. The motor is installed on the lower front side of the support frame. The motor is located inside the support plate. The output shaft of the motor is connected to the placement frame. The upper part of the support frame is provided with a clamping mechanism for clamping the steering knuckle. The placement frame is provided with a limiting mechanism for positioning and limiting the steering knuckle.

[0007] Preferably, the clamping mechanism includes a cylinder, a pressure plate, a sliding sleeve, a first spring, and a rotating ring. The cylinder is mounted on the upper part of the support frame. The lower end of the cylinder's telescopic rod is connected to the pressure plate. The sliding sleeve is slidably connected to the pressure plate. The first spring is connected between the sliding sleeve and the pressure plate. The first spring is sleeved on the pressure plate. The rotating ring is rotatably connected to the bottom of the sliding sleeve. The cylinder drives the pressure plate, the sliding sleeve, and the rotating ring to move downward. The rotating ring presses on the part of the steering knuckle that does not need to be painted. The steering knuckle is clamped by the rotating ring in conjunction with the placement frame.

[0008] Preferably, the limiting mechanism includes a positioning rod, a connecting block, a push block, a push rod, a limiting plate, a second spring, a first telescopic component, and a sleeve rod. The positioning rod is connected inside the placement frame, with a connecting block connected to the middle of the positioning rod. A push block is slidably connected to the upper part of the positioning rod. Push rods are rotatably connected to the front, rear, left, and right sides of the connecting block and the push block. A second spring is connected between the connecting block and the push block, and the second spring is sleeved on the positioning rod. Limiting plates for positioning and limiting the steering knuckle are rotatably connected between the push rods on the upper and lower sides. First telescopic components are connected between the limiting plates on the front and rear sides and between the limiting plates on the left and right sides. A sleeve rod is connected to the middle of the bottom of the pressure plate, located directly above the positioning rod. The sleeve rod moves downwards to contact the push block, placing the steering knuckle on the limiting plate. The pressure plate drives the sleeve rod downwards to contact the push block, and the sleeve rod pushes the push block downwards. The push block, through the push rod, drives the limiting plate outwards to contact the inner wall of the steering knuckle. The inner wall of the steering knuckle does not need to be painted. The limiting plate positions and limits the steering knuckle.

[0009] Preferably, the device also includes an ejection mechanism for easy removal of the steering knuckle. The ejection mechanism includes a positioning block, a fixing sleeve, and a third spring. Fixing sleeves are evenly spaced around the outer circumference of the top wall of the mounting bracket. Positioning blocks are slidably connected to each fixing sleeve. A third spring is connected between the inside of each fixing sleeve and the positioning block that slides on the fixing sleeve. The steering knuckle is locked onto the positioning block, and the positioning block limits the steering knuckle. When the rotating ring moves downward, it presses down the steering knuckle to be at the same horizontal position as the limiting plate. When the rotating ring moves upward, the steering knuckle is ejected upward through the positioning block under the action of the third spring.

[0010] Preferably, the positioning block is U-shaped and is used to limit the steering knuckle.

[0011] Preferably, the system also includes an expansion mechanism to improve the stability of the steering knuckle's limiting and positioning. The expansion mechanism includes a positioning plate, a second telescopic member, a fourth spring, an air cylinder, a piston, an air bladder, a limiting rod, and a pull rope. The positioning plate is slidably connected inside the mounting frame. Air cylinders are evenly spaced around the upper part of the mounting frame, and pistons are slidably connected inside each air cylinder. A second telescopic member is connected between the bottom of each piston and the positioning plate. A fourth spring is fitted onto the lower part of each second telescopic member, and both ends of the fourth spring are connected to the second telescopic member and the positioning plate. An air bladder is connected to the outer side of each limiting plate, and the air bladder communicates with the air cylinder. Limiting rods are connected to both the left and right sides of the mounting frame. Pull ropes are connected to both the left and right sides between the rotating ring and the positioning plate. The pull ropes are wound around the limiting rods. When the rotating ring moves downwards, it drives the positioning plate upwards via the pull rope. The positioning plate, through the second telescopic member, drives the piston upwards. The piston inflates the air bladder through the air cylinder. When the limiting plate moves outwards, it drives the air bladder outwards, allowing the air bladder to fit more closely to the inner wall of the steering knuckle.

[0012] Preferably, the device also includes a drying mechanism for drying the painted steering knuckle. The drying mechanism includes a protective housing, a heating element, and a fan assembly. The protective housing is connected to the lower rear side of the support frame. The heating element is installed at the front of the protective housing, and the fan assembly is installed at the rear of the protective housing. The fan assembly blows the hot air emitted by the heating element onto the steering knuckle to dry it.

[0013] Preferably, it also includes a paint mist removal mechanism to prevent paint mist from spreading and polluting the environment. The paint mist removal mechanism includes a temporary storage box, a filter plate, small fans and a cover plate. The temporary storage box for collecting paint mist is connected to the lower front side of the support frame. The cover plate is rotatably connected to the lower part of the temporary storage box. The filter plate is connected to the upper rear wall of the temporary storage box. Small fans are evenly spaced on the filter plate.

[0014] The advantages of this invention are: the cylinder drives the pressure plate, sliding sleeve, and rotating ring to move downwards; the rotating ring, in conjunction with the mounting bracket, clamps the steering knuckle, placing it on the limiting plate; the pressure plate drives the sleeve rod to move downwards and contact the push block; the sleeve rod pushes the push block downwards; and the push rod drives the limiting plate to move outwards, positioning and limiting the steering knuckle. The inner wall and center of the steering knuckle do not require painting, thus not affecting the painting process; the positioning block limits the steering knuckle; when the rotating ring moves downwards, it presses down on the steering knuckle, placing it at the same horizontal position as the limiting plate; when the rotating ring moves upwards, under the action of the third spring... The steering knuckle is pushed upward by the positioning block, making it easy for people to remove. The rotating ring moves downward, which drives the positioning plate upward through the pull rope. The positioning plate drives the piston upward through the second telescopic component. The piston inflates the air bag through the air cylinder. When the limiting plate moves outward, it drives the air bag outward. The air bag can fit more closely to the inner wall of the steering knuckle, improving the stability of the steering knuckle's limiting and positioning. The fan group blows the hot air emitted by the heating tube onto the steering knuckle to dry it. The small fan sucks the paint mist emitted during painting into the temporary storage box, thereby preventing the paint mist from spreading and polluting the environment. Attached Figure Description

[0015] Figure 1 This is a first-view three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a second-view three-dimensional structural diagram of the present invention.

[0017] Figure 3 This is a partial three-dimensional structural schematic diagram of the present invention.

[0018] Figure 4 This is a three-dimensional structural diagram of the clamping mechanism of the present invention.

[0019] Figure 5 This is a cross-sectional perspective view of the clamping mechanism of the present invention.

[0020] Figure 6 This is a three-dimensional structural diagram of the limiting mechanism of the present invention.

[0021] Figure 7 This is a three-dimensional structural diagram of the limiting mechanism of the present invention.

[0022] Figure 8 This is a three-dimensional structural diagram of the ejection mechanism of the present invention.

[0023] Figure 9 This is a three-dimensional structural diagram of the ejection mechanism of the present invention.

[0024] Figure 10 This is a three-dimensional structural diagram of the expansion mechanism of the present invention.

[0025] Figure 11This is a three-dimensional structural diagram of the expansion mechanism of the present invention.

[0026] Figure 12 This is a schematic diagram of the first three-dimensional structure of the drying mechanism of the present invention.

[0027] Figure 13 This is a schematic diagram of a second three-dimensional structure of the drying mechanism of the present invention.

[0028] Figure 14 This is a three-dimensional structural diagram of the paint mist removal mechanism of the present invention.

[0029] Figure 15 This is a cross-sectional perspective view of the paint mist removal mechanism of the present invention.

[0030] Explanation of reference numerals in the attached drawings: 1_Support frame, 2_Spray gun, 3_Motor, 4_Support plate, 41_Placement frame, 5_Steering knuckle, 6_Clamping mechanism, 61_Cylinder, 62_Pressure plate, 63_Sliding sleeve, 64_First spring, 65_Rotating ring, 7_Limiting mechanism, 71_Positioning rod, 711_Connecting block, 712_Push block, 72_Push rod, 721_Limiting plate, 73_Second spring, 74_First telescopic component, 75_Sleeve rod, 8_Extraction mechanism, 8 1_Positioning block, 82_Fixing sleeve, 83_Third spring, 9_Expansion mechanism, 92_Positioning plate, 93_Second telescopic component, 94_Fourth spring, 95_Air cylinder, 951_Piston, 96_Airbag, 97_Limiting rod, 98_Pull rope, 10_Drying mechanism, 101_Protective housing, 102_Heating tube, 103_Fan assembly, 11_Paint mist removal mechanism, 111_Temporary storage box, 112_Filter plate, 113_Small fan, 114_Cover plate. Detailed Implementation

[0031] The following description is only a preferred embodiment of the present invention and does not limit the scope of protection of the present invention.

[0032] Example 1

[0033] A steering knuckle production positioning and clamping device, with reference to Figures 1-7 The system includes a support frame 1, a paint gun 2, a motor 3, a support plate 4, a placement frame 41, a clamping mechanism 6, and a limiting mechanism 7. The paint gun 2 is installed in the middle of the support frame 1. The support plate 4 is fixed to the lower front side of the support frame 1 by bolts. The placement frame 41 is rotatably connected to the upper part of the support plate 4. The steering knuckle 5 is placed on the placement frame 41. The motor 3 is installed in the lower front side of the support frame 1. The motor 3 is located inside the support plate 4. The output shaft of the motor 3 is connected to the placement frame 41. The clamping mechanism 6 is provided on the upper part of the support frame 1. The clamping mechanism 6 is used to clamp the steering knuckle 5. The limiting mechanism 7 is provided inside the placement frame 41. The limiting mechanism 7 is used to position and limit the steering knuckle 5.

[0034] Reference Figures 4-5 The pressing mechanism 6 includes a cylinder 61, a pressure plate 62, a sliding sleeve 63, a first spring 64, and a rotating ring 65. The cylinder 61 is mounted on the upper part of the support frame 1. The lower end of the telescopic rod of the cylinder 61 is connected to the pressure plate 62. The sliding sleeve 63 is slidably connected to the pressure plate 62. Three first springs 64 are connected between the sliding sleeve 63 and the pressure plate 62. The first springs 64 are sleeved on the pressure plate 62. The bottom of the sliding sleeve 63 is rotatably connected to the rotating ring 65.

[0035] Reference Figures 6-7 The limiting mechanism 7 includes a positioning rod 71, a connecting block 711, a push block 712, a push rod 72, a limiting plate 721, a second spring 73, a first telescopic member 74, and a sleeve rod 75. The positioning rod 71 is welded inside the placement frame 41. A connecting block 711 is welded to the middle of the positioning rod 71. A push block 712 is slidably connected to the upper part of the positioning rod 71. Push rods 72 are rotatably connected to the front, back, left, and right sides of the connecting block 711 and the push block 712. A first telescopic member 74 is connected between the connecting block 711 and the push block 712. Two springs 73 are fitted onto the positioning rod 71. The two push rods 72 on the upper and lower sides are rotatably connected to the limit plate 721. The limit plate 721 is used to position and limit the steering knuckle 5. The two limit plates 721 on the front and rear sides and the two limit plates 721 on the left and right sides are connected to the first telescopic member 74. The bottom center of the pressure plate 62 is welded with a sleeve rod 75. The sleeve rod 75 is located directly above the positioning rod 71. The sleeve rod 75 will move downwards to contact the push block 712.

[0036] In use, the steering knuckle 5 is placed on the mounting bracket 41, and the steering knuckle 5 is fitted onto the limiting plate 721. Then, the cylinder 61 is activated, controlling the extension rod of the cylinder 61 to extend and drive the pressure plate 62, sliding sleeve 63, first spring 64, and rotating ring 65 to move downward. The pressure plate 62 drives the sleeve rod 75 to move downward. When the sleeve rod 75 contacts the push block 712, the sleeve rod 75 pushes the push block 712 to move downward, and the second spring 73 is compressed. The push block 712 drives the limiting plate 721 to move outward through the push rod 72 and contact the inner wall of the steering knuckle 5. The first telescopic member 74 extends, so that the limiting plate 721 positions and limits the steering knuckle 5. When the rotating ring 65 contacts the steering knuckle 5, the rotating ring 65 and sliding sleeve 63 stop moving, the pressure plate 62 continues to move downward, the first spring 64 is compressed, and then the second spring 65... Under the action of spring 64, rotating ring 65 presses against steering knuckle 5, cylinder 61 is closed, and then motor 3 is started. The output shaft of motor 3 rotates, driving placement frame 41 to rotate. Placement frame 41 drives steering knuckle 5 to rotate. Then, the rotating steering knuckle 5 is painted by spray gun 2. After the painting is completed, motor 3 is closed, cylinder 61 is started, and the telescopic rod of cylinder 61 is controlled to retract, driving pressure plate 62, sliding sleeve 63, first spring 64 and rotating ring 65 to move upward and reset. First spring 64 is reset accordingly. Pressure plate 62 drives sleeve rod 75 to move upward and reset. Sleeve rod 75 separates from push block 712, and then, under the action of second spring 73, push block 712 is driven to move upward and reset. Push block 712 drives limit plate 721 to move inward and reset through push rod 72. First telescopic member 74 is reset accordingly.

[0037] Example 2

[0038] Based on Example 1, referring to Figure 1 , Figure 2 , Figure 8 and Figure 9 It also includes an ejection mechanism 8, which includes a positioning block 81, a fixing sleeve 82 and a third spring 83. Three fixing sleeves 82 are welded evenly spaced around the outer periphery of the top wall of the placement frame 41. The positioning block 81 is slidably connected to each fixing sleeve 82. The positioning block 81 is U-shaped and is used to limit the steering knuckle 5. The third spring 83 is connected between the inside of the fixing sleeve 82 and the positioning block 81 that slides on the fixing sleeve 82, so that the steering knuckle 5 is locked on the positioning block 81.

[0039] The steering knuckle 5 is externally locked onto the positioning block 81, which limits the steering knuckle 5. When the rotating ring 65 moves downward and contacts the steering knuckle 5, the rotating ring 65 presses the steering knuckle 5 to the same horizontal position. The steering knuckle 5 drives the positioning block 81 to move downward, and the third spring 83 is compressed. When the rotating ring 65 moves upward and resets, the positioning block 81 moves upward and resets under the action of the third spring 83. The positioning block 81 pushes the steering knuckle 5 upward, making it easy for people to remove the steering knuckle 5.

[0040] Reference Figure 1 , Figure 2 , Figure 10 and Figure 11 It also includes an expansion mechanism 9, which includes a positioning plate 92, a second telescopic member 93, a fourth spring 94, an air cylinder 95, a piston 951, an air bag 96, a limiting rod 97, and a pull rope 98. The positioning plate 92 is slidably connected inside the placement frame 41. Four air cylinders 95 are evenly spaced around the upper part of the placement frame 41. Pistons 951 are slidably connected inside each air cylinder 95. Three second telescopic members 93 are connected between the bottom of each piston 95 and the positioning plate 92. The lower part of each second telescopic member 93 is fitted with a fourth spring 94. The two ends of the fourth spring 94 are connected to the second telescopic member 93 and the positioning plate 92. Air bags 96 are connected to the outer sides of the four limiting plates 721. The air bags 96 are connected to the air cylinders 95. Limiting rods 97 are welded to both sides of the placement frame 41. Pull ropes 98 are connected to both sides of the rotating ring 65 and the positioning plate 92. The pull ropes 98 are wound around the limiting rods 97.

[0041] When the rotating ring 65 moves downward, it drives the positioning plate 92 to move upward via the pull rope 98. The positioning plate 92 drives the piston 951 to move upward via the second telescopic member 93. The piston 951 inflates the airbag 96 via the air cylinder 95. After the piston 951 moves upward to its limit, the positioning plate 92 continues to move upward, the second telescopic member 93 contracts, and the fourth spring 94 is compressed. At this time, the limiting plate 721 moves outward, which in turn drives the airbag 96 to move outward, so that the airbag 96 contacts the inner wall of the steering knuckle 5. The airbag 96 can fit more closely to the inner wall of the steering knuckle 5, and the airbag 96 limits and positions the steering knuckle 5, improving the stability of the limit and position of the steering knuckle 5. When the rotating ring 65 moves upward, the pull rope 98 is released, and then the positioning plate 92 moves downward under the action of the fourth spring 94 resetting. The second telescopic member 93 is also reset. Then, the positioning plate 92, the second telescopic member 93, the fourth spring 94 and the piston 951 move downward and reset due to gravity, causing the airbag 96 to deflate.

[0042] Reference Figure 1 , Figure 2 , Figure 12 and Figure 13 It also includes a drying mechanism 10, which includes a protective housing 101, a heating tube 102 and a fan assembly 103. The protective housing 101 is connected to the lower rear side of the support frame 1. The heating tube 102 is installed in the front of the protective housing 101 and the fan assembly 103 is installed in the rear of the protective housing 101.

[0043] After the painting is completed, the heating element 102 and the fan assembly 103 are turned on. The fan assembly 103 blows the hot air emitted by the heating element 102 onto the steering knuckle 5, thereby drying the steering knuckle 5. After drying is completed, the heating element 102 and the fan assembly 103 are turned off.

[0044] Reference Figure 1 , Figure 2 , Figure 14 and Figure 15 It also includes a paint mist removal mechanism 11, which includes a temporary storage box 111, a filter plate 112, a small fan 113 and a cover plate 114. The temporary storage box 111 is connected to the lower front side of the support frame 1. The temporary storage box 111 is used to collect paint mist. The cover plate 114 is rotatably connected to the lower part of the temporary storage box 111. The filter plate 112 is welded to the upper rear wall of the temporary storage box 111. Small fans 113 are evenly spaced on the filter plate 112.

[0045] When spraying paint, people turn on the small fan 113. The small fan 113 draws the paint mist emitted during spraying into the temporary storage box 111, thereby preventing the paint mist from spreading and polluting the environment. After spraying is completed, the small fan 113 is turned off, the cover 114 is opened to clean the temporary storage box 111, and then the cover 114 is closed.

[0046] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A knuckle production positioning and clamping device, comprising a support frame (1) and a paint spraying gun (2), the paint spraying gun (2) being mounted in the middle of the support frame (1), characterized in that, It also includes a motor (3), a support plate (4), a placement rack (41), a pressing mechanism (6), and a limiting mechanism (7). The support plate (4) is connected to the lower front side of the support frame (1), and the placement rack (41) is rotatably connected to the upper part of the support plate (4). A steering knuckle (5) is placed on the placement rack (41). The motor (3) is installed on the lower front side of the support frame (1). The motor (3) is located inside the support plate (4). The output shaft of the motor (3) is connected to the placement rack (41). The upper part of the support frame (1) is provided with a pressing mechanism (6) for pressing the steering knuckle (5). The placement rack (41) is provided with a limiting mechanism (7) for positioning and limiting the steering knuckle (5). The clamping mechanism (6) includes a cylinder (61), a pressure plate (62), a sliding sleeve (63), a first spring (64), and a rotating ring (65). The cylinder (61) is installed on the upper part of the support frame (1). The lower end of the telescopic rod of the cylinder (61) is connected to the pressure plate (62). The sliding sleeve (63) is slidably connected to the pressure plate (62). The first spring (64) is connected between the sliding sleeve (63) and the pressure plate (62). The first spring (64) is sleeved on the pressure plate (62). The rotating ring (65) is rotatably connected to the bottom of the sliding sleeve (63). The cylinder (61) drives the pressure plate (62), the sliding sleeve (63), and the rotating ring (65) to move downward. The rotating ring (65) will press on the position of the steering knuckle (5) that does not need to be painted. The rotating ring (65) cooperates with the placement frame (41) to clamp the steering knuckle (5). The limiting mechanism (7) includes a positioning rod (71), a connecting block (711), a push block (712), a push rod (72), a limiting plate (721), a second spring (73), a first telescopic member (74), and a sleeve rod (75). The positioning rod (71) is connected inside the placement frame (41). The middle part of the positioning rod (71) is connected to the connecting block (711). The upper part of the positioning rod (71) is slidably connected to the push block (712). The front, back, left, and right sides of the connecting block (711) and the push block (712) are rotatably connected to the push rod (72). The second spring (73) is connected between the connecting block (711) and the push block (712). The second spring (73) is sleeved on the positioning rod (71). The upper and lower push rods (72) are rotatably connected to each other for positioning and limiting the steering knuckle (5). The limiting plate (721) is connected to the first telescopic component (74) between the limiting plates (721) on the front and rear sides and between the limiting plates (721) on the left and right sides. The pressure plate (62) is connected to the middle of the bottom of the inner side with a sleeve rod (75). The sleeve rod (75) is located directly above the positioning rod (71). The sleeve rod (75) will move downward to contact the push block (712) and put the steering knuckle (5) on the limiting plate (721). The pressure plate (62) drives the sleeve rod (75) to move downward to contact the push block (712). The sleeve rod (75) pushes the push block (712) to move downward. The push block (712) drives the limiting plate (721) to move outward through the push rod (72) to contact the inner wall of the steering knuckle (5). The inner wall of the steering knuckle (5) does not need to be painted. The limiting plate (721) positions and limits the steering knuckle (5). It also includes an expansion mechanism (9) for improving the stability of the steering knuckle (5) in limiting and positioning. The expansion mechanism (9) includes a positioning plate (92), a second telescopic member (93), a fourth spring (94), an air cylinder (95), a piston (951), an air bag (96), a limiting rod (97), and a pull rope (98). The positioning plate (92) is slidably connected inside the placement frame (41). Air cylinders (95) are evenly spaced around the upper part of the placement frame (41). Pistons (951) are slidably connected inside the air cylinders (95). The bottom of each piston (951) is connected to the positioning plate (92) with a second telescopic member (93). The lower part of each second telescopic member (93) is fitted with a fourth spring (94). The two ends of the fourth spring (94) are connected to the second telescopic member (93). The positioning plate (92) is connected to the positioning plate (721). Airbags (96) are connected to the outer side of the positioning plate (721). Airbags (96) are connected to air cylinders (95). Limiting rods (97) are connected to both sides of the placement frame (41). Pull ropes (98) are connected to both sides of the rotating ring (65) and the positioning plate (92). Pull ropes (98) are wound around the limiting rods (97). The rotating ring (65) moves downward and drives the positioning plate (92) to move upward through the pull ropes (98). The positioning plate (92) drives the piston (951) to move upward through the second telescopic component (93). The piston (951) inflates the airbag (96) through the air cylinder (95). When the limiting plate (721) moves outward, it drives the airbag (96) to move outward. The airbag (96) fits more closely to the inner wall of the steering knuckle (5).

2. The steering knuckle production positioning and clamping device according to claim 1, characterized in that, It also includes a push-out mechanism (8) for easy access to the steering knuckle (5). The push-out mechanism (8) includes a positioning block (81), a fixing sleeve (82) and a third spring (83). The fixing sleeve (82) is evenly spaced around the top wall of the placement rack (41). The positioning block (81) is slidably connected to the fixing sleeve (82). The third spring (83) is connected between the fixing sleeve (82) and the positioning block (81) that slides on the fixing sleeve (82). The steering knuckle (5) is locked on the positioning block (81). The positioning block (81) limits the steering knuckle (5). When the rotating ring (65) moves downward, it presses down the steering knuckle (5) and the limiting plate (721) to the same horizontal position. When the rotating ring (65) moves upward, the steering knuckle (5) is pushed upward through the positioning block (81) under the action of the third spring (83).

3. The steering knuckle production positioning and clamping device according to claim 2, characterized in that, The positioning block (81) is U-shaped and is used to limit the steering knuckle (5).

4. The steering knuckle production positioning and clamping device according to claim 1, characterized in that, It also includes a drying mechanism (10) for drying the painted steering knuckle (5). The drying mechanism (10) includes a protective housing (101), a heating tube (102) and a fan assembly (103). The protective housing (101) is connected to the lower rear side of the support frame (1). The heating tube (102) is installed in the front of the protective housing (101), and the fan assembly (103) is installed in the rear of the protective housing (101). The fan assembly (103) blows the hot air emitted by the heating tube (102) onto the steering knuckle (5) to dry the steering knuckle (5).

5. A steering knuckle production positioning and clamping device according to claim 1, characterized in that, It also includes a paint mist removal mechanism (11) to prevent paint mist from spreading and polluting the environment. The paint mist removal mechanism (11) includes a temporary storage box (111), a filter plate (112), a small fan (113) and a cover plate (114). The lower front side of the support frame (1) is connected to the temporary storage box (111) for collecting paint mist. The lower part of the temporary storage box (111) is rotatably connected to the cover plate (114). The upper rear wall of the temporary storage box (111) is connected to the filter plate (112). Small fans (113) are evenly spaced on the filter plate (112).

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