Automatic assembling device and method for automobile front axle assembly

Abstract

The invention discloses an automatic assembling device and an assembling method for an automobile front axle assembly, which are applied to the technical field of automatic assembling of the automobile front axle assembly, and the key points of the technical scheme are that the automatic assembling device comprises a conveying line for conveying a positioning carrier; the starting end of the conveying line in the conveying direction is fixedly connected with a hub testing assembly used for testing the hub jumping precision. A first automatic locking assembly used for locking and fixing a half shaft and a steering knuckle arm to a hub and a second automatic locking assembly used for tightening a caliper locking screw are sequentially arranged in the conveying direction of the conveying line, and meanwhile an automatic overturning locking assembly used for overturning a front axle assembly and locking a hub nut is further arranged. The method has the technical effects that the assembly efficiency is improved, and the assembly cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic assembly of automobile steering knuckles, and in particular to an automatic assembly device and an assembly method for an automobile front axle assembly. Background Art

[0002] During the assembly process of the automobile front axle assembly, the brake disc, caliper, half-shaft and steering knuckle arm need to be installed on the wheel hub in sequence and locked with bolts. Finally, the main screw at the end of the half-shaft needs to be tightened to ensure that the steering knuckle can be stably installed on the wheel hub. During the tightening process of the caliper and half-shaft screws, the tightening torque of the screws needs to be strictly controlled and the torque data needs to be recorded. The degree of automation of the automobile front axle assembly in the existing technology is low. It is all pre-tightened after manual installation and then flows into the next step. It is then manually tightened using an EC wrench. This reduces the automatic assembly efficiency of the automobile front axle assembly to a certain extent and increases the assembly cost, which requires improvement. Summary of the Invention

[0003] The first object of the present invention is to provide an automatic assembly device for an automobile steering knuckle, which has the advantages of improving assembly efficiency and reducing assembly costs.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions: an automatic assembly device for a front axle assembly of an automobile, comprising a conveyor line for conveying a positioning carrier; the conveyor line is fixedly connected to a wheel hub test assembly for testing the wheel hub runout accuracy at the starting end along the conveying direction, and a first automatic locking assembly for locking and fixing the half-axle and the steering knuckle arm on the wheel hub and a second automatic locking assembly for tightening the caliper locking screw are sequentially provided along the conveying direction of the conveyor line, and an automatic flip locking assembly for flipping the front axle assembly and locking the wheel hub nut is also provided.

[0005] The present invention is further configured as follows: the wheel hub test assembly includes a fixed test seat and a accommodating seat fixedly connected to the test seat for accommodating the wheel hub; the test seat is movably connected with a wheel hub abutment rod for positioning and abutting the side end face of the wheel hub on both sides of the accommodating seat based on a positioning abutment cylinder; the test seat is movably connected with a horizontal adjustment seat for keeping the mounting end face of the wheel hub horizontal based on a lifting adjustment assembly; the test seat is fixedly connected with a rotating drive assembly for driving the wheel hub mounting surface to rotate; the test seat is also respectively fixed with an upper runout test assembly and a lower runout test assembly for performing a runout test on the upper and lower end faces of the wheel hub mounting end face.

[0006] The present invention is further configured as follows: the rotation drive assembly includes a rotation drive seat fixedly connected to the test seat in a vertical direction and a lifting sliding seat slidably connected to the rotation drive seat in a vertical direction based on a slide rail; the rotation drive seat is fixedly connected to a lifting drive cylinder in a vertical direction for driving the lifting sliding seat to lift and lower; the lifting sliding seat is rotatably connected to a rotation drive disk for driving the wheel hub; the rotation drive disk is provided with a plurality of drive holes along the circumferential direction that cooperate with bolts on the wheel hub; the lifting sliding seat is fixedly connected to a rotation drive motor that drives the rotation drive disk to rotate.

[0007] The present invention is further configured as follows: the upper bounce test assembly includes a sliding test seat fixedly connected to the test seat along the horizontal direction and a sliding seat slidably connected to the sliding test seat, the sliding seat is fixedly connected to an upper displacement sensor for abutting the upper end face of the wheel hub, the sliding test seat is fixedly connected to a sliding cylinder that drives the sliding seat to slide, the lower bounce test assembly includes a lower test seat fixedly connected to the test seat along the horizontal direction and a bounce groove opened on the lower test seat, a bounce test plate is rotatably connected in the bounce groove, the bounce test plate is fixedly connected to a bounce abutting block for abutting the lower end face of the wheel hub at one end protruding from the horizontal adjustment seat, the lower test seat is fixedly connected to the lower displacement sensor at one end away from the bounce abutting block, and the rotation axis of the bounce test plate is located in the middle position of the bounce test plate or is arranged near the bounce abutting block.

[0008] The present invention is further configured as follows: the lifting adjustment assembly includes a set of first lifting adjustment rods and second lifting adjustment rods respectively connected to the test seat in a vertical direction, the test seat is fixedly connected to a first lifting adjustment cylinder and a second lifting adjustment cylinder respectively along the vertical direction to drive the first lifting adjustment rod and the second lifting adjustment rod to achieve lifting, the top end of the first lifting adjustment rod is rotatably connected to the middle position of the horizontal adjustment seat, the end of the horizontal adjustment seat away from the conveying line is fixedly connected to the adjustment seat, the adjustment seat is provided with an adjustment slot, and the top of the second lifting adjustment rod is fixedly connected to the The end is movably connected to the adjusting groove, the end of the wheel hub abutment rod away from the wheel hub is rotatably connected to the telescopic end of the positioning abutment cylinder, and a first adjusting abutment groove is provided in the middle position of the wheel hub abutment rod, and an adjusting abutment block movably arranged in the first adjusting abutment groove is fixedly connected to the test seat, and a second adjusting abutment groove is provided on the adjusting abutment block to cooperate with the first adjusting abutment groove, and the first adjusting abutment groove and the second adjusting abutment groove are connected based on a connecting rod, and a third lifting and adjusting cylinder is fixedly connected to the test seat along the vertical direction with a telescopic shaft hinged on the wheel hub abutment rod.

[0009] The present invention is further configured as follows: the first automatic locking assembly and the second automatic locking assembly both include an automatic locking seat fixedly connected to the conveyor line in a vertical direction and an automatic lifting seat slidably connected to the automatic locking seat in a vertical direction; a lifting and locking cylinder is fixedly connected to the conveyor line in a vertical direction for driving the automatic lifting seat to lift and lower; four half-shaft automatic locking wrenches for locking the half-shaft are fixedly connected to the automatic lifting seat of the first automatic locking assembly in a vertical direction; two caliper automatic locking wrenches for locking the caliper are fixedly connected to the automatic lifting seat of the second automatic locking assembly in a vertical direction; a carrier positioning assembly for realizing the positioning and fixation of the positioning carrier is provided at the positions of the conveyor line corresponding to the first automatic locking assembly and the second automatic locking assembly.

[0010] The present invention is further configured as follows: the carrier positioning assembly includes a plurality of positioning shafts slidably connected to the conveyor line along the vertical direction and used to cooperate with the positioning holes at the bottom of the positioning carrier; the bottom of the conveyor line is fixedly connected along the vertical direction with a lifting positioning cylinder that drives the positioning shaft to rise and fall.

[0011] The present invention is further configured as follows: the automatic flip locking assembly includes a flip seat rotatably connected to the conveyor line and an L-shaped positioning abutment block symmetrically fixedly connected to the upper surface of the flip seat along the conveying direction on both sides for positioning and abutting the side and upper surface of the positioning carrier; the flip seat is symmetrically and parallelly connected to a plurality of abutting conveying wheels for abutting the lower surface of the positioning carrier in a rotational manner at both ends along the conveying direction; a pushing cylinder for abutting the positioning carrier against the L-shaped positioning abutment block is fixedly connected to the flip seat; the telescopic end of the pushing cylinder is fixedly connected There is a pushing block, and the upper end surface of the flip seat is fixedly connected to a half-shaft abutting cylinder based on the mounting frame for abutting the half-shaft to achieve half-shaft fixation, and the mounting frame is fixedly connected to a half-shaft positioning support block for positioning and supporting the half-shaft, and a V-shaped positioning support groove is provided on the half-shaft positioning block. The lower end surface of the flip seat is fixedly connected to a hub nut locking wrench for automatically locking the hub nut, and the lower end surface of the flip seat is also fixedly connected to a flip shaft, and a flip cylinder for pushing the flip seat to flip is hinged on the conveyor line, and the telescopic end of the flip cylinder is hinged on the flip shaft.

[0012] The present invention is further configured as follows: a return line for realizing the return of the positioning carrier is externally connected to the conveying line, and a ball turntable for realizing the conveying of the positioning carrier is fixedly connected to both ends of the conveying line along the conveying direction.

[0013] A second object of the present invention is to provide an automatic assembly method for an automobile steering knuckle, which has the advantages of improving assembly efficiency and reducing assembly costs.

[0014] The above technical objectives of the present invention are achieved through the following technical solutions: an automatic assembly method for an automobile front axle assembly, using an automatic assembly device for an automobile front axle assembly as described in any of the above technical solutions; comprising: Step 1: The assembly worker places the wheel hub in the wheel hub test assembly and drives the wheel hub to rotate to measure the runout error of the upper and lower end surfaces of the wheel hub. After the measurement is completed, the qualified wheel hub is positioned and fixed on the positioning carrier. The brake disc, caliper and half shaft are initially installed on the wheel hub and sent to the conveyor line. Step 2: The positioning carrier is transported along the conveyor line to the first automatic locking assembly for positioning. The assembly worker positions the steering knuckle arm on the wheel hub and installs the half-shaft locking screws and the caliper locking screws. The screws are pre-tightened 1-2 threads. Then, the first automatic locking assembly automatically tightens the half-shaft locking screws and automatically records the torque data of the half-shaft locking screws. Then, the positioning carrier is transported along the conveyor line to the second automatic locking assembly to automatically tighten the caliper locking screws and automatically record the torque data of the half-shaft locking screws. Step 3: The positioning carrier continues to be transported along the conveyor line to the automatic flip locking assembly for positioning. The automatic flip locking assembly drives the positioning carrier to flip 90 degrees and abut the end of the half-shaft to make the half-shaft in a horizontal state. Then, the hub nut is automatically tightened to lock the half-shaft on the wheel hub. After the locking is completed, the automatic flip locking assembly flips the positioning carrier to a horizontal state. Step 4: The positioning carrier is transported to the end of the conveyor line. The assembly worker unloads the assembled automobile front axle assembly from the positioning carrier, and the positioning carrier returns to the initial position of the conveyor line.

[0015] In summary, the present invention has the following beneficial effects: 1. By setting up a conveyor line, a wheel hub test assembly, a first automatic locking assembly, a second automatic locking assembly and an automatic flipping locking assembly, the automatic testing of the wheel hub runout accuracy, the automatic tightening of the half-axle and steering knuckle arm locking screws and the caliper locking screws, and the automatic recording of torque data during the assembly of the automobile front axle assembly are realized. At the same time, the automatic flipping of the front axle assembly and the automatic locking of the wheel hub nuts are realized, which greatly improves the degree of automation of the automobile front axle assembly assembly, reduces manual operations, thereby improving assembly efficiency and reducing assembly costs. At the same time, the conveyor line is connected to a return line and a ball turntable is set at both ends to realize the return circulation of the positioning carrier, further improving the continuity and efficiency of the assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of this embodiment; Figure 2 is a schematic structural diagram of the wheel hub test assembly of this embodiment; Figure 3 is a schematic structural diagram of the hub abutment rod of this embodiment; Figure 4 1 is a schematic structural diagram of the upper runout test assembly of this embodiment; Figure 5 1 is a schematic structural diagram of the lower runout test assembly of this embodiment; Figure 6 1 is a schematic structural diagram of the first automatic locking assembly and the second automatic locking assembly of this embodiment; Figure 7 yes Figure 6 A magnified schematic diagram of part A; Figure 8 2 is a schematic structural diagram of the automatic flip locking assembly of this embodiment; Figure 9 yes Figure 8 A magnified schematic diagram of part B; Figure 10 yes Figure 8 A magnified schematic diagram of part C; Figure 11 It is a structural schematic diagram of the automobile front axle assembly of this embodiment.

[0017] Reference numerals: 1, conveyor line; 11, positioning carrier; 12, return line; 13, rolling ball turntable; 2, wheel hub test assembly; 21, test seat; 22, receiving seat; 23, positioning abutment cylinder; 24, wheel hub abutment rod; 241, first adjustment abutment groove; 242, adjustment abutment block; 244, connecting rod; 245, third lifting adjustment cylinder; 25, lifting adjustment assembly; 251, first lifting adjustment rod; 252, second lifting adjustment rod; 253 , first lifting adjustment cylinder; 254, second lifting adjustment cylinder; 255, adjustment seat; 256, adjustment slot; 26, horizontal adjustment seat; 27, rotation drive assembly; 271, rotation drive seat; 272, slide rail; 273, lifting and sliding seat; 274, lifting drive cylinder; 275, rotation drive disk; 277, rotation drive motor; 28, upper runout test assembly; 281, sliding test seat; 282, sliding seat; 283, upper displacement sensor; 284, sliding cylinder; 29, lower runout test assembly; 291, lower test seat; 292, runout groove; 293, runout test plate; 294, runout abutment block; 295, lower displacement sensor; 3, first automatic locking assembly; 31, automatic locking seat; 32, automatic lifting seat; 33, lifting locking cylinder; 34, half-axle automatic locking wrench; 35, carrier positioning assembly; 351, positioning shaft; 352, lifting positioning cylinder; 4, second automatic locking assembly Parts; 41. Automatic locking wrench for calipers; 5. Automatic flip locking assembly; 51. Flip seat; 52. L-shaped positioning abutment block; 53. Abutment conveyor wheel; 54. Pushing cylinder; 55. Pushing block; 56. Abutment cylinder for half-shaft; 57. Axis-shaft positioning support block; 58. V-shaped positioning support groove; 59. Wheel hub nut locking wrench; 510. Flip shaft; 511. Flip cylinder; 6. Wheel hub; 7. Brake disc; 8. Caliper; 9. Half-shaft; 10. Steering knuckle arm. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below with reference to the accompanying drawings.

[0019] Example 1: refer to Figures 1 to 11An automatic assembly device for an automobile front axle assembly includes a conveyor line 1 for conveying a positioning carrier 11, a wheel hub testing assembly 2 for testing the runout accuracy of a wheel hub 6 is fixedly connected to the starting end of the conveyor line 1 along the conveying direction, a first automatic locking assembly 3 for locking and fixing the half shaft 9 and the steering knuckle arm 10 on the wheel hub 6 and a second automatic locking assembly 4 for tightening the caliper locking screw are sequentially provided along the conveying direction of the conveyor line 1, and an automatic flip locking assembly 5 for flipping the front axle assembly and locking the wheel hub nut is also provided. By arranging the conveyor line 1, the wheel hub testing assembly 2, the first automatic locking assembly 3, the second automatic locking assembly 4 and the automatic flip locking assembly 5, the assembly process of the automobile front axle assembly is realized. Automatic testing of the runout accuracy of the middle wheel hub 6, automatic tightening of the locking screws of the half-shaft 9 and the steering knuckle arm 10, and automatic recording of the torque data, while realizing automatic flipping of the front axle assembly and automatic locking of the wheel hub nuts, greatly improves the degree of automation in the assembly of the front axle assembly of the automobile, reduces manual operations, thereby improving assembly efficiency and reducing assembly costs. A reflow line 12 for realizing the reflow of the positioning carrier 11 is externally connected to the conveyor line 1, and a ball turntable 13 for realizing the conveying of the positioning carrier 11 is fixedly connected at both ends of the conveying direction. The conveyor line 1 is externally connected to the reflow line 12 and a ball turntable 13 is set at both ends, which can realize the reflow recycling of the positioning carrier 11, further improving the continuity and efficiency of the assembly.

[0020] refer to Figures 2 to 5Specifically, the wheel hub test assembly 2 includes a fixed test seat 21 and a accommodating seat 22 fixedly connected to the test seat 21 for accommodating the wheel hub 6. The test seat 21 is movably connected with a wheel hub abutting rod 24 on both sides of the accommodating seat 22 based on the positioning abutting cylinder 23. The end of the wheel hub abutting rod 24 is arranged in an arc shape to improve the fitting accuracy. The wheel hub abutting rod 24 abuts against the end of the rotating bearing located away from the mounting end face of the wheel hub 6, so as to ensure the clamping stability of the wheel hub 6 while enabling the wheel hub 6 to be rotated. A horizontal adjustment seat 26 for keeping the mounting end face of the wheel hub 6 horizontal is movably connected to the test seat 21 based on the lifting adjustment assembly 25. A rotation driving assembly 27 for driving the mounting surface of the wheel hub 6 to rotate is fixedly connected to the test seat 21. An upper runout test assembly 28 and a lower runout test assembly 29 for performing runout test on the upper and lower end faces of the mounting end face of the wheel hub 6 are also fixedly connected to the test seat 21. The rotary drive assembly 27 includes a rotary drive seat 271 fixedly connected to the test seat 21 in the vertical direction and a lifting sliding seat 273 slidably connected to the rotary drive seat 271 in the vertical direction based on a slide rail 272. A lifting drive cylinder 274 is fixedly connected to the rotary drive seat 271 in the vertical direction to drive the lifting sliding seat 273 to move up and down. A rotary drive disk 275 for driving the wheel hub 6 is rotatably connected to the lifting sliding seat 273. The rotary drive disk 275 is provided with a plurality of screw threads that are circumferentially connected to the wheel hub 6. The lifting sliding seat 273 is fixedly connected to a driving hole of the bolt that drives the rotating driving disk 275 to rotate. The rotating driving motor 277 drives the rotating driving disk 275 to rotate through a belt drive. When the wheel hub 6 is positioned on the horizontal adjustment seat 26, the lifting driving cylinder 274 drives the lifting sliding seat 273 to rise and fall so that the driving hole on the rotating driving disk 275 is inserted into the bolt of the wheel hub 6, and then the rotating driving motor 277 drives the rotating driving disk 275 and the wheel hub 6 to rotate.

[0021] refer to Figures 4 and 5Specifically, the upper beating test assembly 28 includes a sliding test seat 281 fixedly connected to the test seat 21 along the horizontal direction and a sliding seat 282 slidably connected to the sliding test seat 281. An upper displacement sensor 283 for abutting the upper end surface of the wheel hub 6 is fixedly connected to the sliding seat 282. A sliding cylinder 284 for driving the sliding seat 282 to slide is fixedly connected to the sliding test seat 281. The sliding cylinder 284 of the upper beating test assembly 28 extends to drive the sliding seat 282 and the upper displacement sensor 283 to abut the upper end surface of the wheel hub 6. The sensor moves to the upper surface of the hub 6 and makes the test head of the upper displacement sensor 283 abut against the upper surface of the hub 6. The displacement data of the upper displacement sensor 283 is used to determine the vibration of the upper surface of the hub 6 when the hub 6 rotates to reflect the quality of the hub 6; the lower vibration test assembly 29 includes a lower test seat 291 fixedly connected to the test seat 21 along the horizontal direction and a vibration groove 292 opened on the lower test seat 291. A vibration test plate 293 is rotatably connected in the vibration groove 292. The end of the beating test plate 293 close to the horizontal adjustment seat 26 is fixedly connected with a beating abutment block 294 for abutting the lower end surface of the wheel hub 6. The end of the lower test seat 291 away from the beating abutment block 294 is fixedly connected to the lower displacement sensor 295. The rotation axis of the beating test plate 293 is located in the middle position of the beating test plate 293 or is set close to the beating abutment block 294. When the wheel hub 6 rotates, the abutment block 242 is adjusted to abut the lower end surface of the wheel hub 6 and transmit the beating condition to the beating abutment plate. The lower displacement sensor 295 at the other end of the lower test seat 291 measures the runout of the adjustment abutment plate away from the end of the hub 6 to achieve accurate measurement of the runout of the lower surface of the hub 6. By setting the rotation axis of the runout test plate 293 to be located in the middle position of the runout test plate 293 or close to the runout abutment block 294, the runout span of the runout test plate 293 is made larger than the actual runout span of the small surface of the hub 6, thereby reducing the measurement error of the lower displacement sensor 295 and improving the runout measurement accuracy of the lower end face of the hub 6.

[0022] refer to Figure 2Specifically, the lifting adjustment assembly 25 includes a first lifting adjustment rod 251 and a second lifting adjustment rod 252, which are respectively connected to the test seat 21 in a sliding manner along the vertical direction. A first lifting adjustment cylinder 253 and a second lifting adjustment cylinder 254 are respectively fixedly connected to the test seat 21 in the vertical direction to drive the first lifting adjustment rod 251 and the second lifting adjustment rod 252 to achieve lifting. The top end of the first lifting adjustment rod 251 is rotatably connected to the middle position of the horizontal adjustment seat 26. An adjustment seat 255 is fixedly connected to the end of the horizontal adjustment seat 26 away from the conveyor line 1. An adjustment slot 256 is provided on the top, and the top end of the second lifting adjustment rod 252 is movably connected to the adjustment slot 256. The test seat 21 is provided with a sliding line connected to the ball turntable 13 at the end of the horizontal adjustment seat 26 near the conveyor line 1. In the initial state, the horizontal adjustment seat 26 is in a horizontal state to facilitate the runout test. When the runout test is completed and the wheel hub 6 needs to be transferred to the positioning carrier 11 on the ball conveyor line 1, the second lifting adjustment cylinder 254 drives the second lifting adjustment rod 252 to rise, and the horizontal adjustment seat 26 rotates around the end of the first lifting adjustment rod 251 to move away from the sliding line. One end of the shifting line is tilted, and the wheel hub 6 is also disengaged from the accommodating seat 22, so that the wheel hub 6 can be transported to the rolling ball turntable 13 through the sliding line. At the same time, by simultaneously controlling the first lifting adjustment cylinder 253 and the second lifting adjustment cylinder 254, the distance between the horizontal adjustment seat 26 and the test seat 21 can be adjusted to adapt to the testing requirements of wheel hubs 6 of different specifications. The end of the wheel hub abutment rod 24 away from the wheel hub 6 is rotatably connected to the telescopic end of the positioning abutment cylinder 23, and the middle position of the wheel hub abutment rod 24 is provided with a first adjusting abutment groove 241, and a movable arrangement arranged on the first adjustment is fixedly connected to the test seat 21. An adjusting abutment block 242 is provided in the joint abutment groove 241, and a second adjusting abutment groove cooperating with the first adjusting abutment groove 241 is provided on the adjusting abutment block 242. The first adjusting abutment groove 241 and the second adjusting abutment groove are connected based on a connecting rod 244. A third lifting adjusting cylinder 245 is fixedly connected to the test seat 21 along the vertical direction and hingedly connected to the hub abutment rod 24 with a telescopic shaft. By setting the first adjusting abutment groove 241 and the second adjusting abutment groove, the hub 6 abutment roller can be floatingly connected to the test seat 21 and the positioning abutment cylinder 23, thereby adapting to the requirements of hubs 6 of different specifications.

[0023] refer to Figures 6 and 7Specifically, the first automatic locking assembly 3 and the second automatic locking assembly 4 each include an automatic locking seat 31 fixedly connected to the conveyor line 1 in the vertical direction and an automatic lifting seat 32 slidably connected to the automatic locking seat 31 in the vertical direction. A lifting and locking cylinder 33 is fixedly connected to the conveyor line 1 in the vertical direction for driving the automatic lifting seat 32 to move up and down. Four half-shaft automatic locking wrenches 34 for locking the half-shaft 9 are fixedly connected to the automatic lifting seat 32 of the first automatic locking assembly 3 in the vertical direction. Two half-shaft automatic locking wrenches 34 for locking the half-shaft 9 are fixedly connected to the automatic lifting seat 32 of the second automatic locking assembly 4 in the vertical direction. The automatic locking wrench for locking the caliper 8 can accurately control the locking torque of the half-shaft 9 screws and the caliper 8 screws and record the locking torque. A carrier positioning component 35 is provided at the position of the conveyor line 1 corresponding to the first automatic locking component 3 and the second automatic locking component 4 for positioning and fixing the positioning carrier 11. When the positioning carrier 11 is transported to the position of the first automatic locking component 3 and the second automatic locking component 4 through the conveyor line 1, the carrier positioning component 35 positions and fixes the positioning carrier 11 to ensure that the relative position between the first automatic locking component 3 and the second automatic locking component 4 is accurate. The carrier positioning assembly 35 includes a plurality of positioning shafts 351 that are slidably connected to the conveyor line 1 in the vertical direction and are used to cooperate with the positioning holes at the bottom of the positioning carrier 11. A lifting and positioning cylinder 352 that drives the positioning shafts 351 up and down is fixedly connected to the bottom of the conveyor line 1 in the vertical direction. The lifting and positioning cylinder 352 drives the positioning shafts 351 to rise and enter the positioning holes to achieve the positioning and fixation of the positioning carrier 11. There are at least three groups of positioning shafts 351. At the same time, a blocking assembly is provided on the conveyor line 1 to achieve blocking when the positioning carrier 11 is transported to the locking station, so that the carrier positioning assembly 35 can position and fix the positioning carrier 11. A manual assembly station for manually assembling and locking the steering knuckle arm 10 is also provided between the second automatic locking assembly 4 and the automatic flip locking assembly 5. Since the steering knuckle arm 10 has different shapes and is difficult to position, it is difficult to use automation for automatic assembly. Therefore, manual assembly is still used here. This is not an improvement of the present invention and will not be described in detail here.

[0024] refer to Figures 8 to 10Specifically, the automatic flip locking assembly 5 includes a flip seat 51 rotatably connected to the conveyor line 1 and L-shaped positioning abutment blocks 52 symmetrically fixedly connected to the upper surface of the flip seat 51 along the conveying direction on both sides for positioning and abutting the side and upper surface of the positioning carrier 11. A plurality of abutment conveying wheels 53 for abutting the lower surface of the positioning carrier 11 are symmetrically and rotatably connected to the two ends of the flip seat 51 along the conveying direction. The conveying plane of the abutment conveying wheels 53 is on the same horizontal plane as the conveying plane of the conveyor line 1. The positioning carrier 11 is conveyed to the abutment conveying wheels 53 through the conveyor line 1. A pushing cylinder 54 is fixedly connected to the flip seat 51 for abutting the positioning carrier 11 against the L-shaped positioning abutment block 52. The telescopic end of the pushing cylinder 54 is fixedly connected to a pushing block 55. When the positioning carrier 11 is transported to the abutment conveying wheel 53 through the conveyor line 1, the pushing cylinder 54 drives the pushing block 55 to extend and abut the lower end surface of the positioning carrier 11 so that the upper end surface of the positioning carrier 11 abuts on the L-shaped positioning abutment block 52 to complete the positioning of the positioning carrier 11. The upper end surface of the flip seat 51 is fixedly connected based on the mounting frame to abut the half-shaft 9 to achieve the fixation of the half-shaft 9. The half-shaft abuts the cylinder 56, and the half-shaft positioning support block 57 for positioning and supporting the half-shaft 9 is fixedly connected to the mounting frame. A V-shaped positioning support groove 58 is provided on the half-shaft 9 positioning block. When the flip seat 51 flips over, the half-shaft 9 is positioned and supported by the half-shaft positioning support block 57. At the same time, the half-shaft abuts the end of the half-shaft 9 away from the wheel hub 6 through the half-shaft abutting cylinder 56 to achieve the positioning and fixation of the half-shaft 9, avoiding the half-shaft 9 from rotating when locking the wheel hub 6 screws and affecting the screw locking effect. A hub nut locking wrench for automatically locking the hub nut is fixedly connected to the lower end surface of the flip seat 51. 59. The hub nut is locked and rotated to a specified torque through the hub 6 locking nut to ensure the locking effect of the hub 6 screw. A flip shaft 510 is also fixedly connected to the lower end surface of the flip seat 51. A flip cylinder 511 is hinged on the conveyor line 1 to push the flip seat 51 to flip. The telescopic end of the flip cylinder 511 is hinged on the flip shaft 510. When the positioning carrier 11 and the half-shaft 9 are fixed, the flip cylinder 511 is extended to abut the flip shaft 510, so that the flip seat 51 is rotated 90 degrees, which is convenient for installing the hub 6 screw and automatically locking it through the hub 6 locking wrench.

[0025] Example 2: An automatic assembly method for an automobile front axle assembly, using an automatic assembly device for an automobile front axle assembly as shown in Example 1, comprising: Step 1: The assembly worker places the wheel hub 6 in the wheel hub test assembly 2 and drives the wheel hub 6 to rotate to measure the runout error of the upper and lower end surfaces of the wheel hub 6. After the measurement is completed, the qualified wheel hub 6 is positioned and fixed on the positioning carrier 11, and the brake disc 7, caliper 8 and half shaft 9 are preliminarily installed on the wheel hub 6 and sent to the conveyor line 1; Step 2: The positioning carrier 11 is transported along the conveyor line 1 to the first automatic locking assembly 3 for positioning. The assembly worker positions the steering knuckle arm 10 on the wheel hub 6 and installs the half-shaft 9 locking screws and the caliper locking screws. The screws are pre-tightened by 1-2 threads. Then, the first automatic locking assembly 3 automatically locks the half-shaft 9 locking screws and automatically records the torque data of the half-shaft 9 locking screws. Then, the positioning carrier 11 is transported along the conveyor line 1 to the second automatic locking assembly 4 to automatically lock the caliper locking screws and automatically record the torque data of the half-shaft 9 locking screws. Step 3: The positioning carrier 11 is continuously transported along the conveyor line 1 to the automatic flip locking assembly 5 for positioning. The automatic flip locking assembly 5 drives the positioning carrier 11 to flip 90 degrees and abut the end of the half-shaft 9 to make the half-shaft 9 in a horizontal state. The hub nut is then automatically tightened to lock the half-shaft 9 on the wheel hub 6. After the locking is completed, the automatic flip locking assembly 5 flips the positioning carrier 11 to a horizontal state. Step 4: The positioning carrier 11 is transported to the end of the conveyor line 1 , and the assembly worker unloads the assembled automobile front axle assembly from the positioning carrier 11 , and the positioning carrier 11 returns to the initial position of the conveyor line 1 .

[0026] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make creative modifications to this embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An automatic assembly device for a front axle assembly of an automobile, comprising a conveyor line (1) for conveying a positioning carrier (11); characterized in that: The conveyor line (1) is fixedly connected to a wheel hub test assembly (2) for testing the runout accuracy of the wheel hub (6) at the starting end along the conveying direction. A first automatic locking assembly (3) for locking and fixing the half shaft (9) and the steering knuckle arm (10) on the wheel hub (6) and a second automatic locking assembly (4) for tightening the caliper locking screw are sequentially provided along the conveying direction of the conveyor line (1). An automatic flip locking assembly (5) for flipping the front axle assembly and locking the wheel hub nut is also provided.

2. The automatic assembly device for automobile front axle assembly according to claim 1, characterized in that: The wheel hub test assembly (2) comprises a fixed test seat (21) and a receiving seat (22) fixedly connected to the test seat (21) for receiving the wheel hub (6); the test seat (21) is movably connected to a wheel hub abutment rod (24) on both sides of the receiving seat (22) based on a positioning abutment cylinder (23); the test seat (21) is movably connected to a horizontal adjustment seat (26) for keeping the mounting end face of the wheel hub (6) horizontal and facilitating the unloading of the wheel hub (6) based on a lifting adjustment assembly (25); the test seat (21) is fixedly connected to a rotation drive assembly (27) for driving the mounting face of the wheel hub (6) to rotate; the test seat (21) is also fixedly connected to an upper runout test assembly (28) and a lower runout test assembly (29) for performing a runout test on the upper and lower end faces of the mounting end face of the wheel hub (6).

3. The automatic assembly device for automobile front axle assembly according to claim 2, characterized in that: The rotary drive assembly (27) comprises a rotary drive seat (271) fixedly connected to the test seat (21) in a vertical direction and a lifting sliding seat (273) slidably connected to the rotary drive seat (271) in a vertical direction based on a slide rail (272), the rotary drive seat (271) is fixedly connected with a lifting drive cylinder (274) in a vertical direction for driving the lifting sliding seat (273) to be lifted and lowered, the lifting sliding seat (273) is rotatably connected with a rotary drive disk (275) for driving the wheel hub (6), the rotary drive disk (275) is provided with a plurality of drive holes in a circumferential direction for matching with bolts on the wheel hub (6), and the lifting sliding seat (273) is fixedly connected with a rotary drive motor (277) for driving the rotary drive disk (275) to rotate.

4. The automatic assembly device for automobile front axle assembly according to claim 2, characterized in that: The upper bounce test assembly (28) includes a sliding test seat (281) fixedly connected to the test seat (21) along the horizontal direction and a sliding seat (282) slidably connected to the sliding test seat (281), an upper displacement sensor (283) for abutting the upper end surface of the wheel hub (6) is fixedly connected to the sliding test seat (282), and a sliding cylinder (284) for driving the sliding seat (282) to slide is fixedly connected to the sliding test seat (281). The lower bounce test assembly (29) includes a lower test seat (291) fixedly connected to the test seat (21) along the horizontal direction and A beating groove (292) is provided on the lower test seat (291), a beating test plate (293) is rotatably connected in the beating groove (292), one end of the beating test plate (293) close to the horizontal adjustment seat (26) is protruding and fixedly connected with a beating abutment block (294) for abutting the lower end surface of the wheel hub (6), one end of the lower test seat (291) away from the beating abutment block (294) is fixedly connected with a lower displacement sensor (295), and the rotation axis of the beating test plate (293) is located in the middle position of the beating test plate (293) or is arranged close to the beating abutment block (294).

5. The automatic assembly device for automobile front axle assembly according to claim 2, characterized in that: The lifting and adjusting assembly (25) comprises a first lifting and adjusting rod (251) and a second lifting and adjusting rod (252) which are respectively connected to the test seat (21) in a sliding manner along the vertical direction. The test seat (21) is fixedly connected with a first lifting and adjusting cylinder (253) and a second lifting and adjusting cylinder (254) which drive the first lifting and adjusting rod (251) and the second lifting and adjusting rod (252) to achieve lifting and lowering. The top end of the first lifting and adjusting rod (251) is rotatably connected to the middle position of the horizontal adjustment seat (26). The end of the horizontal adjustment seat (26) away from the conveying line (1) is fixedly connected with an adjusting seat (255). The adjusting seat (255) is provided with an adjusting slot (256). The top end of the second lifting and adjusting rod (252) is movable. The wheel hub abutting rod (24) is rotatably connected to the adjusting groove (256), one end of the wheel hub abutting rod (24) away from the wheel hub (6) is rotatably connected to the telescopic end of the positioning abutting cylinder (23), and a first adjusting abutting groove (241) is provided at the middle position of the wheel hub abutting rod (24), and an adjusting abutting block (242) movably arranged in the first adjusting abutting groove (241) is fixedly connected to the test seat (21), and a second adjusting abutting groove cooperating with the first adjusting abutting groove (241) is provided on the adjusting abutting block (242), and the first adjusting abutting groove (241) and the second adjusting abutting groove are connected based on a connecting rod (244), and a third lifting adjusting cylinder (245) is fixedly connected to the test seat (21) along the vertical direction, and a telescopic shaft is hinged to the wheel hub abutting rod (24).

6. The automatic assembly device for automobile front axle assembly according to claim 1, characterized in that: The first automatic locking assembly (3) and the second automatic locking assembly (4) both comprise an automatic locking seat (31) fixedly connected to the conveyor line (1) in the vertical direction and an automatic lifting seat (32) slidably connected to the automatic locking seat (31) in the vertical direction; a lifting locking cylinder (33) is fixedly connected to the conveyor line (1) in the vertical direction for driving the automatic lifting seat (32) to lift and lower; four half-shaft automatic locking wrenches (34) for locking the half-shaft (9) are fixedly connected to the automatic lifting seat (32) of the first automatic locking assembly (3) in the vertical direction; two caliper automatic locking wrenches (41) for locking the caliper (8) are fixedly connected to the automatic lifting seat (32) of the second automatic locking assembly (4) in the vertical direction; and a carrier positioning assembly (35) for realizing the positioning and fixing of the positioning carrier (11) is provided at positions of the conveyor line (1) corresponding to the first automatic locking assembly (3) and the second automatic locking assembly (4).

7. The automatic assembly device for automobile front axle assembly according to claim 6, characterized in that: The carrier positioning assembly (35) includes a plurality of positioning shafts (351) slidably connected to the conveyor line (1) along the vertical direction and used to cooperate with the positioning holes at the bottom of the positioning carrier (11); the bottom of the conveyor line (1) is fixedly connected along the vertical direction with a lifting positioning cylinder (352) for driving the positioning shafts (351) to rise and fall.

8. The automatic assembly device for automobile front axle assembly according to claim 1, characterized in that: The automatic flip locking assembly (5) comprises a flip seat (51) rotatably connected to the conveying line (1) and an L-shaped positioning abutment block (52) symmetrically fixedly connected to the upper surface of the flip seat (51) along the conveying direction on both sides for positioning and abutting the side and upper surface of the positioning carrier (11). The flip seat (51) is symmetrically and rotatably connected to a plurality of abutting conveying wheels (53) for abutting the lower surface of the positioning carrier (11) at both ends along the conveying direction. A pushing cylinder (54) for abutting the positioning carrier (11) on the L-shaped positioning abutment block (52) is fixedly connected to the flip seat (51). The telescopic end of the pushing cylinder (54) is fixedly connected to the pushing block (55). The upper end surface of (51) is fixedly connected to a half-shaft abutting cylinder (56) based on a mounting frame for abutting the half-shaft (9) to fix the half-shaft (9); the mounting frame is fixedly connected to a half-shaft positioning support block (57) for positioning and supporting the half-shaft (9); the half-shaft (9) positioning block is provided with a V-shaped positioning support groove (58); the lower end surface of the flip seat (51) is fixedly connected to a hub nut locking wrench (59) for automatically locking the hub nut; the lower end surface of the flip seat (51) is also fixedly connected to a flip shaft (510); a flip cylinder (511) for pushing the flip seat (51) to flip is hinged on the conveyor line (1); the telescopic end of the flip cylinder (511) is hinged on the flip shaft (510).

9. The automatic assembly device for automobile front axle assembly according to claim 1, characterized in that: The conveying line (1) is externally connected to a return line (12) for realizing the return of the positioning carrier (11), and the conveying line (1) is fixedly connected to a rolling ball turntable (13) for realizing the conveyance of the positioning carrier (11) at both ends along the conveying direction.

10. An automatic assembly method for a front axle assembly of an automobile, using an automatic assembly device for a front axle assembly of an automobile as described in any one of claims 1 to 9; characterized in that: include: Step 1: The assembly worker places the wheel hub (6) in the wheel hub test assembly (2), and drives the wheel hub (6) to rotate to measure the runout error of the upper and lower end surfaces of the wheel hub (6). After the measurement is completed, the qualified wheel hub (6) is positioned and fixed on the positioning carrier (11), and the brake disc (7), caliper (8) and half shaft (9) are preliminarily installed on the wheel hub (6) and sent to the conveyor line (1); Step 2, the positioning carrier (11) is transported along the conveyor line (1) to the first automatic locking assembly (3) for positioning, the assembly worker positions the steering knuckle arm (10) on the wheel hub (6) and installs the half-shaft (9) locking screw and the caliper locking screw, the screws are pre-tightened 1-2 threads, then the first automatic locking assembly (3) automatically locks the half-shaft (9) locking screw, and automatically records the torque data of the half-shaft (9) locking screw, then the positioning carrier (11) is transported along the conveyor line (1) to the second automatic locking assembly (4) to automatically lock the caliper locking screw and automatically record the torque data of the half-shaft (9) locking screw; Step 3: The positioning carrier (11) continues to be transported along the conveyor line (1) to the automatic flip locking assembly (5) for positioning. The automatic flip locking assembly (5) drives the positioning carrier (11) to flip 90 degrees and abut the end of the half shaft (9) so that the half shaft (9) is in a horizontal state. Then, the hub nut is automatically tightened to lock the half shaft (9) on the wheel hub (6). After the locking is completed, the automatic flip locking assembly (5) flips the positioning carrier (11) to a horizontal state. Step 4: The positioning carrier (11) is transported to the end of the conveyor line (1), and the assembly worker unloads the assembled automobile front axle assembly from the positioning carrier (11), and the positioning carrier (11) returns to the initial position of the conveyor line (1).

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