Knuckle bearing automatic tightening machine for chassis assembly production line

Abstract

The utility model discloses a knuckle bearing automatic tightening machine for a chassis assembly line, and belongs to the technical field of automobile chassis production equipment. The device is provided with a working rack; the bottom of the lifting mechanism is fixedly connected with the working rack, and the top of the lifting mechanism is provided with a liftable supporting shaft used for supporting a workpiece; the locking mechanism and the pressing mechanism are fixedly connected with the working rack and arranged at the two ends of the lifting mechanism respectively. The locking mechanism is provided with a clamping and positioning plate capable of ascending and descending, the clamping and positioning plate extends towards the direction of the lifting mechanism, and a clamping mechanism used for clamping a workpiece is fixedly connected to the clamping and positioning plate; the pressing mechanism is provided with a pressing positioning plate capable of ascending and descending, the pressing positioning plate extends in the direction of the lifting mechanism, and a plurality of telescopic floating positioning pins are arranged on the edge of the pressing positioning plate so that the pressing positioning plate can be inserted into workpiece positioning holes conveniently. The device further comprises a tightening mechanism connected with the mechanical arm, and an adapter is installed at the bottom end of the tightening mechanism and used for automatically tightening a bolt on a workpiece.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile chassis production equipment, in particular to an automatic tightening machine for a steering knuckle bearing used in a chassis assembly production line. Background Art

[0002] The steering knuckle is an important component of the vehicle chassis system. It has a connection function, installs related components, transmits the force between various components, and ensures the stable driving of the car. A dust shield and bearing bolts are installed on the steering knuckle of a certain vehicle model. During assembly, after completing the bolt installation and pre-tightening process, the next process requires tightening the bolts to fix the dust shield and steering knuckle with bolts. The traditional assembly method is to tighten the bolts manually, which is time-consuming, labor-intensive, inefficient, and not conducive to mass production. Utility Model Content

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide an automatic tightening machine for steering knuckle bearings for chassis assembly production lines, which is suitable for automatic tightening of left and right parts of front steering knuckles, dust shields, and bearing bolts, is convenient for mass production, meets the production rhythm, and has high production efficiency.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] The utility model discloses an automatic tightening machine for a steering knuckle bearing used in a chassis assembly production line, comprising:

[0006] Workbench;

[0007] A lifting mechanism, the bottom of which is fixedly connected to the workbench and the top of which has a lifting and lowering support shaft for supporting the workpiece; and

[0008] A locking mechanism and a pressing mechanism fixedly connected to the workbench and respectively arranged at two ends of the lifting mechanism;

[0009] The locking mechanism has a clamping positioning plate that can be raised and lowered, the clamping positioning plate extends toward the lifting mechanism, and a clamping mechanism for clamping a workpiece is fixedly connected to the clamping positioning plate;

[0010] The clamping mechanism has a clamping positioning plate that can be raised and lowered, the clamping positioning plate extends toward the lifting mechanism and is provided with a plurality of retractable floating positioning pins at its edge so as to be inserted into the workpiece positioning hole; and

[0011] A tightening mechanism connected to the manipulator has an adapter installed at the bottom end of the tightening mechanism for tightening bolts on the workpiece.

[0012] Furthermore, the workbench is located above the lifting mechanism and a production line for workpiece circulation is arranged thereon. The support shaft of the lifting mechanism protrudes out of the upper surface of the production line after being extended. A check mechanism is installed at the workpiece entry end of the workbench, a check assembly is installed on the top of the check mechanism, and a blocking mechanism is installed at the workpiece output end of the workbench, a blocker is installed on the top of the blocking mechanism.

[0013] Furthermore, the workbench is located above the lifting mechanism and a production line for workpiece circulation is arranged thereon. The support shaft of the lifting mechanism is extended and protrudes from the upper surface of the production line. The workbench is provided with a blocking mechanism at the workpiece output end, and a blocker is installed on the top of the blocking mechanism.

[0014] Furthermore, the workbench operates in two stations, and the clamping and positioning plate is equipped with two clamping mechanisms.

[0015] Furthermore, the lifting mechanism includes a lifting seat plate, the support shafts are arranged at both ends of the lifting seat plate, and a driver is installed at the lower part of the lifting seat plate for providing lifting and lowering driving force for the support shaft.

[0016] Furthermore, a support cylinder is arranged at the lower part of the lifting seat plate between the two drivers, the support cylinder is fixedly connected to the lifting seat plate through a support cylinder seat, and the support cylinder piston rod is fixedly connected to a support plug plate.

[0017] Furthermore, the clamping mechanism comprises a slide seat fixedly connected to the clamping positioning plate, and a locking slide table slidably connected to the slide seat;

[0018] A slider capable of relative displacement is slidably connected to one side of the slide seat, a driver is connected between the two sliders for separating the two sliders, and a clamping bevel is installed on the side of the slider away from the driver;

[0019] A guide bevel is arranged on one side of the locking slide, so that the locking slide is displaced toward the slider, so that the guide bevel contacts the inclined surface of the clamping bevel and drives the slider to clamp the workpiece.

[0020] Furthermore, a clamping block is fixedly connected to the upper surface of the clamping and positioning plate, and the clamping block is equipped with a vertically lifting pressure head, through which the workpiece is clamped from above the workpiece.

[0021] Furthermore, the floating positioning pin includes a guide shaft hoisted on the clamping positioning plate, the clamping positioning plate is fixedly connected with a spring seat corresponding to the position of the guide shaft, a spring for driving the guide shaft to extend is installed inside the spring seat, and a positioning pin is fixedly connected to the end of the guide shaft.

[0022] Furthermore, the tightening mechanism includes a fixed seat and a connecting plate fixedly connected to one side of the fixed seat for connecting to a robot, and a centering core shaft. The centering core shaft is fixedly connected to the lower center position of the fixed seat, and the fixed seat is circumferentially installed with a tightening shaft, and an adapter is installed at the end of the tightening shaft.

[0023] In the above technical solution, the automatic tightening machine for steering knuckle bearings used in chassis assembly production lines provided by the utility model has the following beneficial effects:

[0024] The automatic tightening machine designed by the utility model is provided with a lifting mechanism, a locking mechanism, a pressing mechanism and a tightening mechanism on its workbench. The workpiece is lifted by the lifting mechanism, and the workpiece is clamped and pressed from above by the locking mechanism and the pressing mechanism. The tightening mechanism is connected with a manipulator, thereby realizing automatic tightening of bolts on the workpiece, facilitating batch production, meeting the production rhythm, and effectively improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic diagram of the overall structure of an automatic tightening machine for a steering knuckle bearing used in a chassis assembly production line disclosed by the utility model;

[0027] Figure 2 This is a front view of a steering knuckle bearing automatic tightening machine for a chassis assembly production line disclosed in the utility model after the tightening mechanism is removed;

[0028] Figure 3 It is a left view of a steering knuckle bearing automatic tightening machine for a chassis assembly production line disclosed in the utility model after the tightening mechanism is removed;

[0029] Figure 4 It is a top view of a steering knuckle bearing automatic tightening machine for a chassis assembly production line disclosed in the utility model after removing the tightening mechanism;

[0030] Figure 5 This is a front view of a lifting mechanism of a steering knuckle bearing automatic tightening machine used in a chassis assembly production line disclosed in the utility model;

[0031] Figure 6 It is a cross-sectional view of a lifting mechanism of a steering knuckle bearing automatic tightening machine for a chassis assembly production line disclosed in the utility model;

[0032] Figure 7 It is a top view of a lifting mechanism of a steering knuckle bearing automatic tightening machine used in a chassis assembly production line disclosed by the utility model;

[0033] Figure 8 This is a front view of a locking mechanism of a steering knuckle bearing automatic tightening machine used in a chassis assembly production line disclosed by the utility model;

[0034] Fig. 9 It is a left view of a locking mechanism of a steering knuckle bearing automatic tightening machine used in a chassis assembly production line disclosed by the utility model;

[0035] Fig.10 It is a top view of a locking mechanism of a steering knuckle bearing automatic tightening machine used in a chassis assembly production line disclosed by the utility model;

[0036] Fig.11 This is a front view of a clamping mechanism of a steering knuckle bearing automatic tightening machine used in a chassis assembly production line disclosed by the utility model;

[0037] Fig.12 It is a left-side full cross-sectional view of a clamping mechanism of a steering knuckle bearing automatic tightening machine for a chassis assembly production line disclosed in the utility model;

[0038] Fig.13 It is a top view of a clamping mechanism of a steering knuckle bearing automatic tightening machine for a chassis assembly production line disclosed by the utility model;

[0039] Fig.14 This is a front view of a clamping mechanism of a steering knuckle bearing automatic tightening machine used in a chassis assembly production line disclosed by the utility model;

[0040] Fig.15 It is a left view of a clamping mechanism of a steering knuckle bearing automatic tightening machine used in a chassis assembly production line disclosed by the utility model;

[0041] Fig.16 It is a top view of a clamping mechanism of a steering knuckle bearing automatic tightening machine used in a chassis assembly production line disclosed by the utility model;

[0042] Fig.17 This is a structural schematic diagram of a floating locating pin of a steering knuckle bearing automatic tightening machine used in a chassis assembly production line disclosed by the utility model;

[0043] Fig.18 This is a front view of a tightening mechanism of a steering knuckle bearing automatic tightening machine used in a chassis assembly production line disclosed by the utility model;

[0044] Fig.19The utility model discloses a left view of a tightening mechanism of a steering knuckle bearing automatic tightening machine used in a chassis assembly production line.

[0045] Description of reference numerals:

[0046] Workbench 10; stand 11; guide rail 111; stand 12; guide rail 121; production line body 13; stand 14;

[0047] Lifting mechanism 20; lifting seat plate 21; lifting cylinder 22; first support shaft 23; second support shaft 24; round pin support shaft 241; diamond pin support shaft 242; supporting cylinder 25; supporting cylinder seat 251; supporting insert plate 252; gasket 26; pull head 27;

[0048] Locking mechanism 30; slide 31; clamping positioning plate 32; locking cylinder 33; cylinder seat plate 331;

[0049] Clamping mechanism 40; slide 41; longitudinal guide rail 411; transverse guide rail 412; locking slide 42; guide bevel 421; clamping cylinder 43; cylinder seat plate 431; pull head 432; slide block 44; clamping plate 441; clamping bevel 442; guide shaft 443; spring 444; clamping block 45; spring seat 451; pressure head 452; guide shaft 453; spring 454;

[0050] Clamping mechanism 50; slide 51; clamping positioning plate 52; clamping cylinder 53; cylinder seat plate 531; positioning pin 54; guide shaft 541; spring 542; spring seat 543;

[0051] Tightening mechanism 60; connecting plate 61; fixing seat 62; centering mandrel 63; tightening shaft 64; adapter 65;

[0052] Non-return seat plate 70; Non-return assembly 71;

[0053] Blocking seat plate 80; blocker 81. DETAILED DESCRIPTION

[0054] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0055] See also Figure 1-4 As shown;

[0056] The utility model discloses an automatic tightening machine for a steering knuckle bearing used in a chassis assembly production line, comprising:

[0057] Workbench 10;

[0058] A lifting mechanism 20, the bottom of which is fixedly connected to the workbench 10 and the top of which has a support shaft capable of being raised and lowered for supporting the workpiece; and

[0059] A locking mechanism 30 and a pressing mechanism 50 are fixedly connected to the workbench 10 and are respectively arranged at both ends of the lifting mechanism 20;

[0060] The locking mechanism 30 has a clamping positioning plate 32 that can be raised and lowered. The clamping positioning plate 32 extends toward the lifting mechanism 20 . A clamping mechanism 40 for clamping a workpiece is fixedly connected to the clamping positioning plate 32 .

[0061] The clamping mechanism 50 has a clamping positioning plate 52 that can be raised and lowered. The clamping positioning plate 52 extends toward the lifting mechanism 20 and is provided with a plurality of retractable floating positioning pins at its edge so as to be inserted into the positioning hole of the workpiece.

[0062] A tightening mechanism 60 connected to the manipulator has an adapter 65 installed at the bottom end of the tightening mechanism 60 for tightening bolts on the workpiece.

[0063] See also Figure 2-4 As shown, specifically, the workbench 10 is a frame structure, the bottom of which is in contact with the ground through feet, and the top of which is fixedly connected to a table top, which is a quadrilateral structure with a hollow structure in the middle. The lifting mechanism 20 is installed in the middle of the workbench 10 through a lifting seat plate 21 and is fixedly connected to the tables on both sides. The lifting seat plate 21 of the lifting mechanism 20 is installed with a support shaft, and the lower part is fixedly connected with a lifting cylinder 22 through a connecting seat. The piston rod of the lifting cylinder 22 is connected to the support shaft through a pull head. When working, the support shaft is driven to rise and fall by the lifting cylinder 22. The table of the workbench 10 is located on both sides of the locking mechanism 30 and the clamping mechanism 50, and the lifting mechanisms 20 are evenly arranged, that is, the two lifting mechanisms 20 can lift the workpiece on both sides of the workpiece. The workpiece in this embodiment involves the automatic tightening of the left and right parts of the front steering knuckle, the dust shield, and the bearing bolts of a certain vehicle model in the prior art;

[0064] A stand 11 and a stand 12 are installed on both sides of the workbench, wherein the stand 11 on one side is slidably connected to a locking mechanism 30 through a guide rail 111, and a pressing mechanism 50 is slidably connected to the stand 12 on the other side, and a cylinder seat plate 331 is fixedly connected to the stand 11, and a cylinder seat plate 531 is fixedly connected to the stand 12. The stand 11 is fixedly connected to a locking cylinder 33 through the cylinder seat plate 331, and the stand 12 is fixedly connected to a pressing cylinder 50 through the cylinder seat plate 531. Cylinder 53, stand 11 and stand 12 drive locking mechanism 30 and clamping mechanism 50 to rise and fall through cylinder, clamping mechanism 40 is fixedly connected to clamping positioning plate 32 of locking mechanism 30, workpiece is clamped by clamping mechanism 40, and clamping positioning plate 52 of clamping mechanism 50 is equipped with floating positioning pin, which is inserted into the positioning hole of workpiece through floating positioning pin, and vertical pole 14 is fixedly connected to the corner position of workbench 10, and switch bracket is installed through vertical pole 14;

[0065] See also Figure 1As shown, the tightening mechanism 60 is located above the workbench 10 and connected to the manipulator, and an adapter 65 is installed at the bottom end of the tightening mechanism 60 for tightening the bolts on the workpiece.

[0066] See also Figure 1 As shown, preferably, the workbench 10 is located above the lifting mechanism 20 and is provided with a production line body 13 where workpieces flow. The support shaft of the lifting mechanism 20 extends out and protrudes from the upper surface of the production line body 13. The workbench 10 is provided with a check mechanism at the workpiece entry end, and a check assembly 71 is installed on the top of the check mechanism. The workbench 10 is provided with a blocking mechanism at the workpiece output end, and a blocker 81 is installed on the top of the blocking mechanism. Among them, the workbench 10 is provided with a blocking mechanism at the workpiece output end, and a blocker 81 is installed on the top of the blocking mechanism.

[0067] See also Figure 4 As shown, specifically, the workbench 10 is located above the lifting mechanism 20 and is provided with a production line body 13 for the circulation of workpieces. When working, the support shaft of the lifting mechanism 20 extends out and protrudes from the upper surface of the production line body 13;

[0068] The non-return mechanism includes a non-return seat plate 70 and a non-return assembly 71, and the blocking mechanism includes a blocking seat plate 80 and a blocker 81. The workbench 10 table top is located on the outside of the two lifting seats 21 and the non-return seat plate 70 and the blocking seat plate 80 are respectively installed. The non-return seat plate 70 is installed with the non-return assembly 71, which is a non-return assembly produced by Misumi with model ATBM20A-S-PI in the prior art. The non-return assembly 71 is used to prevent the workpiece from retreating. The blocking seat plate 80 is installed with the blocker 81, which is a blocking cylinder produced by SMC with model ATBM20A-S-PI, and the workpiece is prevented from moving forward by the blocker 81.

[0069] See also Figure 1 As shown, preferably, the workbench 10 works in a double-station manner, and the clamping and positioning plate 32 is provided with two clamping mechanisms 40. The two clamping mechanisms 40 can be used to clamp the left steering knuckle and the right steering knuckle synchronously.

[0070] See also Figure 5-7 As shown, preferably, the lifting mechanism 20 includes a lifting seat plate 21, support shafts are arranged at both ends of the lifting seat plate 21, and a driver is installed at the lower part of the lifting seat plate 21 to provide lifting driving force for the support shaft. A support cylinder 25 is arranged between the two lifting cylinders 22 at the lower part of the lifting seat plate 21, and the support cylinder 25 is fixedly connected to the lifting seat plate 21 through a support cylinder seat 251, and the piston rod of the support cylinder 25 is fixedly connected to a support plug plate 252.

[0071] See also Figure 6As shown, specifically, the support shaft includes a first support shaft 23 and a second support shaft 24. The first support shaft 23 is installed at one end of the lifting seat plate 21 through an oil-free bushing. The top end of the first support shaft 23 has a flat surface for contacting the workpiece surface. The other end of the lifting seat plate 21 is installed with a second support shaft 24 through an oil-free bushing. The second support shaft 24 includes a round pin support shaft 241 and a rhombus pin support shaft 242. The rhombus pin support shaft 242 is fixedly connected to the top end of the round pin support shaft 241 for cooperating with the pin hole of the workpiece.

[0072] A driver is installed at the lower part of the lifting seat plate 21. Preferably, the driver is a lifting cylinder 22. The lifting cylinder 22 is fixedly connected to the lifting seat plate 21 through a lifting cylinder seat. The piston rod of the lifting cylinder 22 is connected to the support shaft through a pull head 27. A gasket 26 is installed on the pull head 27. The piston of the lifting cylinder 22 is telescopic to drive the support shaft to rise and fall.

[0073] A support cylinder 25 is arranged at the lower part of the lifting seat plate 21 between the two drivers. The support cylinder 25 is fixedly connected to the lifting seat plate 21 through a support cylinder seat 251. The piston rod of the support cylinder 25 is fixedly connected with a support plug plate 252. The support plug plate 252 can extend under the gasket 26 inside the lifting cylinder 22 seat to support the support shaft.

[0074] See also Figure 8-13 As shown, preferably, the clamping mechanism 40 includes a slide seat 41 fixedly connected to the clamping positioning plate 32 and a locking slide table 42 slidably connected to the slide seat 41;

[0075] A slider 44 capable of relative displacement is slidably connected to one side of the slide seat 41, a driver is connected between the two sliders 44 to separate the two sliders 44, and a clamping bevel 442 is installed on the side of the slider 44 away from the driver;

[0076] A guide bevel 421 is arranged opposite to one side of the locking slide 42 , so that the locking slide 42 moves toward the slider 44 , so that the guide bevel 421 contacts the inclined surface of the clamping bevel 442 and drives the slider 44 to clamp the workpiece.

[0077] See also Figure 11-13 As shown, specifically, the clamping mechanism 40 is fixedly connected to the clamping positioning plate 32 through a slide 41, the slide 41 is the main body of the clamping mechanism 40, and a cylinder seat plate 431 is fixedly connected to the upper surface of the slide 41, a clamping cylinder 43 is fixedly connected through the cylinder seat plate 431, and a locking slide 42 is slidably connected through a longitudinal guide rail 411, and a piston rod of the clamping cylinder 43 is fixedly connected to the locking slide 42. When working, the clamping cylinder 43 provides a driving force to drive the locking slide 42 to move, and a groove is provided on the locking slide 42 away from the clamping cylinder 43. The two opposite side walls of the groove are fixedly connected with guide inclined blocks 421;

[0078] The front end of the slide 41 is slidably connected to two slide blocks 44 through a transverse guide rail 412 perpendicular to the displacement direction of the locking slide 42. A clamping bevel 442 is installed on the top of the slide 44. The clamping bevel 442 contacts the inclined surface of the guide bevel 421, so that the locking slide 42 is displaced toward the slide 44. The guide bevel 421 contacts the inclined surface of the clamping bevel 442 and drives the slide 44 to clamp the workpiece. The opposite surfaces of the two slides 44 are fixedly connected with a clamping plate 441, which contacts the workpiece through the clamping plate 441. A guide shaft 443 is slidably connected between the two slides 44. A driver is sleeved on the guide shaft 443. The driver is a compression spring 444. After the slide 44 loses its force, the two slides 44 are driven by the driver to move in the direction of separation, thereby releasing the workpiece.

[0079] See also Fig.12 , 13 As shown, preferably, a clamping block 45 is fixedly connected to the upper surface of the clamping positioning plate 32 , and the clamping block 45 is equipped with a vertically lifting pressing head 452 , and the workpiece is pressed from above the workpiece by the pressing head 452 .

[0080] Specifically, a clamping block 45 is fixedly connected to the upper surface of the clamping positioning plate 32 between the two sliders 44, and a guide shaft 453 is hoisted on the clamping block 45. A spring seat 451 is fixedly connected to the upper surface of the clamping block 45 corresponding to the position of the guide shaft 453, and a spring 454 for driving the guide shaft 453 to extend is installed in the spring seat 451. A pressure head 452 is fixedly connected to the end of the guide shaft 453;

[0081] See also Figure 14-17 As shown, preferably, the floating positioning pin includes a guide shaft 541 suspended on the clamping positioning plate 52, and the clamping positioning plate 52 is fixedly connected with a spring seat 543 at the position corresponding to the guide shaft 541, and a spring 542 for driving the guide shaft 541 to extend is installed inside the spring seat 543, and a positioning pin 54 is fixedly connected to the end of the guide shaft 541.

[0082] Specifically, the clamping mechanism 50 includes a slide 51 and a clamping positioning plate 52. One side of the clamping positioning plate 52 is slidably connected to a stand 12 installed on the workbench 20 through the slide 51. The stand 12 is fixedly connected to a cylinder seat plate 531, and a clamping cylinder 53 is fixedly connected to the cylinder seat plate 531. A floating positioning pin is installed at the position corresponding to the clamping mechanism 40 on the other side of the clamping positioning plate 52. The floating positioning pin includes a guide shaft 541. The guide shaft 541 is hoisted at the lower part of the clamping positioning plate 52. A spring seat 543 is fixedly connected to the upper surface of the clamping positioning plate 52 corresponding to the position of the guide shaft 541. A spring 542 for driving the guide shaft 541 to extend is installed inside the spring seat 543. A positioning pin 54 is fixedly connected to the end of the guide shaft 541, and the positioning pin 54 cooperates with the positioning hole of the workpiece.

[0083] See also Figure 18-19As shown, preferably, the tightening mechanism 60 includes a connecting plate 61, a fixing seat 62, a tightening shaft 64, an adapter 65, and a centering mandrel 63;

[0084] A connecting disk 61 is fixedly connected to one side of the fixed seat 62, which is connected to the manipulator through the connecting disk 61. A tightening shaft 64 for driving the adapter 65 to rotate is installed on the fixed seat 62. A centering spindle 63 is fixedly connected to the center position of the lower part of the fixed seat 62. A tightening shaft 64 is installed circumferentially around the centering spindle 63 on the fixed seat 62. A bit is installed at the end of the tightening shaft 64 through the adapter 65 for tightening bolts.

[0085] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An automatic tightening machine for steering knuckle bearings used in chassis assembly production lines, characterized in that: include: Workbench (10); A lifting mechanism (20) having a bottom fixedly connected to the workbench (10) and a top having a support shaft capable of being raised and lowered for supporting a workpiece; and A locking mechanism (30) and a pressing mechanism (50) fixedly connected to the workbench (10) and respectively arranged at two ends of the lifting mechanism (20); The locking mechanism (30) has a clamping positioning plate (32) that can be raised and lowered, the clamping positioning plate (32) extending in the direction of the lifting mechanism (20), and a clamping mechanism (40) for clamping a workpiece is fixedly connected to the clamping positioning plate (32); The clamping mechanism (50) has a clamping positioning plate (52) that can be raised and lowered, the clamping positioning plate (52) extending toward the lifting mechanism (20) and having a plurality of retractable floating positioning pins installed at its edge so as to be inserted into the workpiece positioning hole; and A tightening mechanism (60) connected to the manipulator, wherein a conversion joint (65) is installed at the bottom end of the tightening mechanism (60) for tightening bolts on a workpiece.

2. The automatic knuckle bearing tightening machine for chassis assembly production line according to claim 1, characterized in that; The workbench (10) is located above the lifting mechanism (20) and is provided with a production line body (13) on which workpieces flow; the support shaft of the lifting mechanism (20) extends out and protrudes from the upper surface of the production line body (13); a non-return mechanism is installed at the workpiece entry end of the workbench (10); a non-return assembly (71) is installed on the top of the non-return mechanism; a blocking mechanism is installed at the workpiece output end of the workbench (10); a blocker (81) is installed on the top of the blocking mechanism.

3. The automatic knuckle bearing tightening machine for chassis assembly production line according to claim 1, characterized in that; The workbench (10) is located above the lifting mechanism (20) and is provided with a production line (13) on which workpieces flow; the support shaft of the lifting mechanism (20) extends out and protrudes from the upper surface of the production line (13); a blocking mechanism is installed at the workpiece output end of the workbench (10), and a blocker (81) is installed on the top of the blocking mechanism.

4. The automatic knuckle bearing tightening machine for chassis assembly production line according to claim 1, characterized in that; The workbench (10) operates in two working positions, and the clamping positioning plate (32) is provided with two clamping mechanisms (40).

5. The automatic tightening machine for steering knuckle bearing used in chassis assembly production line according to any one of claims 1 to 3, It is characterized by: The lifting mechanism (20) comprises a lifting seat plate (21), the supporting shafts are arranged at both ends of the lifting seat plate (21), and a driver is installed at the lower part of the lifting seat plate (21) for providing lifting driving force for the supporting shaft.

6. The automatic tightening machine for steering knuckle bearings used in chassis assembly production lines according to claim 5, characterized in that; A support cylinder (25) is arranged at the lower part of the lifting seat plate (21) between the two drivers. The support cylinder (25) is fixedly connected to the lifting seat plate (21) via a support cylinder seat (251). The piston rod of the support cylinder (25) is fixedly connected to a support plug plate (252).

7. The automatic tightening machine for steering knuckle bearings used in chassis assembly production lines according to any one of claims 1 to 3, characterized in that ； The clamping mechanism (40) comprises a slide seat (41) fixedly connected to the clamping positioning plate (32) and a locking slide table (42) slidably connected to the slide seat (41); A slider (44) capable of relative displacement is slidably connected to one side of the slide seat (41); a driver is connected between the two sliders (44) for separating the two sliders (44); a clamping bevel (442) is installed on the side of the slider (44) away from the driver; A guide bevel (421) is arranged on one side of the locking slide (42), so that the locking slide (42) is displaced toward the slider (44) so ​​that the guide bevel (421) contacts the inclined surface of the clamping bevel (442) and drives the slider (44) to clamp the workpiece.

8. The automatic tightening machine for steering knuckle bearings used in chassis assembly production lines according to claim 7, It is characterized by: A clamping block (45) is fixedly connected to the upper surface of the clamping positioning plate (32), and the clamping block (45) is equipped with a vertically lifting pressure head (452), and the workpiece is clamped from above the workpiece through the pressure head (452).

9. The automatic knuckle bearing tightening machine for a chassis assembly production line according to any one of claims 1 to 3, characterized in that; The floating positioning pin comprises a guide shaft (541) suspended on the clamping positioning plate (52); the clamping positioning plate (52) is fixedly connected with a spring seat (543) at a position corresponding to the guide shaft (541); a spring (542) for driving the guide shaft (541) to extend is installed inside the spring seat (543); and a positioning pin (54) is fixedly connected to the end of the guide shaft (541).

10. The automatic tightening machine for steering knuckle bearing used in chassis assembly production line according to any one of claims 1 to 3, It is characterized by: The tightening mechanism (60) comprises a fixed seat (62), a connecting plate (61) fixedly connected to one side of the fixed seat (62) for connecting to a robot, and a centering core shaft (63); the centering core shaft (63) is fixedly connected to the lower center position of the fixed seat (62); a tightening shaft (64) is installed on the fixed seat (62) in the circumferential direction of the centering core shaft (63); and an adapter (65) is installed at the end of the tightening shaft (64).

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