An automatic assembly production line for steering wheels and a process thereof

Abstract

The application relates to a rudder wheel automatic assembly production line, which comprises a conveying line and a carrier plate transmitted backward under the guidance of the conveying line, and further comprises a nut upper assembly mechanism, a bearing press assembly mechanism, a snap ring inspection mechanism and an air tightness detection mechanism arranged in sequence along the direction of the conveying line; the carrier plate is provided with a clamping mechanism, and the rudder wheel shell is clamped by the clamping mechanism to assemble the parts in the rudder wheel shell, wherein the rudder wheel shell comprises a first mounting port, a second mounting port and a third mounting port; the application solves the technical problem that the posture of the rudder wheel is difficult to adjust during assembly, the rudder wheel cannot keep a vertical state during hoisting due to the particularity of the rudder wheel mechanism, and the rudder wheel must be manually adjusted to be vertical when being placed into a frame; the rudder wheel for a conventional forklift is heavy in weight, and it is extremely difficult and dangerous to adjust.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steering wheel processing, and particularly relates to a steering wheel automatic assembly production line and a process thereof. BACKGROUND

[0002] With the progress of science and technology and the increase of labor costs, the development of robot technology is paid more and more attention by various countries. As an important part of the development of robot technology, path planning is one of the difficulties and hot issues of industrial robots. The existing steering wheel assembly line research object mainly designs the realization of steering wheel assembly work, and studies the planning and assembly of the assembly path.

[0003] The patent document with the patent number CN2021101397047 discloses a vertical steering wheel assembly tool, which comprises a mounting frame, a first worm gear assembly and a second worm gear assembly arranged on the mounting frame, a lifting mechanism comprising a lifting frame and at least one set of composite connecting rod groups, the lifting frame being connected with the steering wheel body, the first end of the composite connecting rod group being in transmission connection with the first worm gear assembly, and the second end of the composite connecting rod group being connected with the lifting frame, and a pressing mechanism comprising a four-link assembly, the first end of the four-link assembly being in transmission connection with the second worm gear assembly, and the second end of the four-link assembly being connected with the steering wheel upper support.

[0004] However, in actual use, the inventor finds that it is difficult to adjust the posture of the steering wheel during assembly, and the steering wheel cannot be kept in a vertical state during lifting due to the particularity of its own mechanism. Therefore, it is necessary to adjust the steering wheel to be vertical by manual operation when it is placed into the frame. However, the steering wheel for a conventional forklift is heavy in weight, and it is extremely difficult and dangerous to adjust it. SUMMARY

[0005] The present application aims at the deficiencies of the prior art, and sets a nut mounting mechanism, a bearing pressing mechanism, a clasp checking mechanism and a gas tightness detection mechanism, so that the steering wheel tool is clamped by the clamping mechanism during assembly, and is conveyed on the conveying line. During the conveying process, the assembly work of each accessory is sequentially completed, thereby solving the technical problems that the steering wheel assembly work is relatively complicated, any one part is not accurately installed in place, and the stability and safety of the whole product during use are poor.

[0006] 1. In view of the above technical problems, the technical scheme is as follows: a steering wheel automatic assembly line, comprising a conveying line and a carrier disc conveyed backward from the conveying line, characterized in that the steering wheel automatic assembly line further comprises a nut mounting mechanism, a bearing pressing mechanism, a clasp checking mechanism and a gas tightness detection mechanism arranged in sequence along the direction of the conveying line.

[0007] The steering wheel shell is mounted on the clamping mechanism, and is adjusted to different suspended states under the rotation drive of the clamping mechanism.

[0008] The rudder wheel housing is transmitted to the nut loading mechanism, the nut loading mechanism moves downward into the first installation port of the rudder wheel housing, and the nut is rotated and loaded to the waiting position;

[0009] The rudder wheel housing is transmitted to the bearing pressing mechanism, the bearing pressing mechanism is horizontally pushed into the second installation port of the rudder wheel housing, and the oil seal is loaded in place by the plug-in method;

[0010] The rudder wheel housing is transmitted to the snap ring inspection mechanism, the snap ring inspection mechanism is pressed into the first installation port of the rudder wheel housing, and the snap ring inspection mechanism automatically identifies the accuracy of the snap ring in place by using its own extension amount;

[0011] The rudder wheel housing is transmitted to the air tightness detection mechanism, the air tightness detection mechanism is pressed into the first installation port of the rudder wheel housing, and the air tightness detection mechanism is bidirectionally positioned after being in place, and the precise air tightness detection work is completed.

[0012] As preferred, the nut loading mechanism comprises:

[0013] A driving assembly, comprising a first driving unit mounted on the rack and a first torque plate connecting portion connected with the first driving unit;

[0014] A guide sleeve, which is matched and sleeved outside the first torque plate connecting portion and is mounted on the rack; and

[0015] An adjusting assembly, comprising a second torque plate connecting portion rotatably arranged on the guide sleeve and structurally matched with the first torque plate connecting portion, a gasket located at the upper end of the second torque plate connecting portion, and a spring located at the upper end of the gasket and sleeved outside the second torque plate connecting portion;

[0016] The first driving unit comprises a motor, a speed reducer arranged at the output end of the motor, and a transmission cylinder coaxial with and synchronously driven with the output end of the speed reducer, and the upper end of the second torque plate connecting portion is drivingly arranged in the transmission cylinder through a spline structure.

[0017] As preferred, the bearing pressing mechanism comprises a mounting piece matched with and detachably arranged in the second installation port of the rudder wheel housing, and a pressing piece penetratingly inserted into the second installation port of the rudder wheel housing and matched with the mounting piece to automatically load the oil seal into the second installation port of the rudder wheel housing;

[0018] The mounting piece comprises a positioning flange matched with the ladder, an oil seal clamp with the oil seal arranged in the gap of the double-row tapered roller bearing, and a plum blossom ring arranged in the oil seal clamp;

[0019] The top pressing piece comprises a high-pressure oil cylinder and an oil pressure connector which is in clamping connection with the output end of the high-pressure oil cylinder, and the oil pressure connector is provided with a wrench block which is matched with the wrench ring.

[0020] As preferred, the clamping ring inspection mechanism comprises a downward moving unit and an abutting mechanism which is elastically connected with the downward moving unit and is sleeved outside the downward moving unit;

[0021] The clamping mechanism clamps the rudder housing, the abutting mechanism is driven by the downward moving unit to move downward through the second mounting port and abut against the expansion ring, the downward moving unit continues to move downward to extend into the rudder housing to a predetermined position, and the sensor outside the downward moving unit measures the distance change between the downward moving unit and the abutting mechanism through the elastic unit.

[0022] As preferred, the air tightness detection mechanism comprises:

[0023] A detection piece extends to the upper end cover of the rudder housing to seal, and an air tightness testing unit is arranged thereon, and the air tightness testing unit detects the air tightness inside the rudder housing through the detection piece;

[0024] A positioning piece is installed on both sides of the detection piece, and the locking block of the positioning piece rotates to position the outer end surface of the rudder housing after reaching the position;

[0025] A deviation rectifying piece is installed below the detection piece and is arranged in abutment with the inner wall of the rudder housing.

[0026] As preferred, the clamping mechanism comprises a rotating unit which is rotatably arranged on a support, a clamping unit which is connected with one end of the rotating unit, and a limiting unit which is arranged on the other side of the support relative to the clamping unit;

[0027] When the limiting unit cooperates with the rotating unit to realize clamping, the rotating unit stops the activity in the circumferential direction; when the rotating unit loses the limiting of the limiting unit, the rotating unit automatically moves in the circumferential direction.

[0028] The rudder automatic assembly production line is provided with two groups and is arranged symmetrically along the axis center; the conveying line is provided in an elliptical structure, and a plurality of groups of the trays are sequentially and orderly transmitted along the transmission direction of the conveying line.

[0029] A production process of a rudder automatic assembly line, comprising:

[0030] Step one, primary assembly process, manually install the rudder housing on the clamping unit, and transmit it backward under the guidance of the conveying line, complete the installation of the bearing inner assembly, the outer sleeve of the bearing and the large gear through the press during the transmission of the rudder housing, and clamp the rudder housing by the clamping unit and transmit it to the next station after installation;

[0031] Step 2, nut installation process: The drive assembly drives the second torque plate connection to rotate through the first torque plate connection. The nut is installed on the pinion. After the nut is installed in place, the clamping unit clamps the steering wheel housing and rotates it counterclockwise by 180° and transfers it to the next station.

[0032] Step 3, oil seal and output shaft installation process: The mounting component, together with the top pressing component, automatically installs the oil seal into the second mounting port of the steering wheel housing. Then, the steering wheel housing is transported backward under the guidance of the conveyor line. After the clamping unit clamps the steering wheel housing, it rotates 90° counterclockwise again. The main pressing mechanism of the output shaft presses the output shaft into the third mounting port from bottom to top. After the output shaft is installed in place, the clamping unit clamps the steering wheel housing and transports it to the next station.

[0033] Step four, the retaining ring inspection process: the retaining ring is manually placed into the groove, and the abutting mechanism, driven by the lowering unit, moves down through the second mounting port to abut the expansion ring. The lowering unit continues to move down and extends into the predetermined position inside the rudder housing. The sensor outside the lowering unit measures the change in distance between the lowering unit and the abutting mechanism through the change in elasticity. After the rudder housing is inspected, the clamping unit clamps the rudder housing and rotates it 90° clockwise and continues to transfer it to the next station.

[0034] Step 5, side cover installation process: The pressing mechanism presses the side cover into the second installation port. After the side cover of the rudder housing is installed in place, the clamping unit clamps the rudder housing and rotates it 90° clockwise and continues to transfer it to the next station.

[0035] Step six, airtightness testing process: The testing component moves downward to a suitable position, the positioning component clamps the steering wheel housing, and the airtightness testing unit tests the airtightness inside the steering wheel housing through the testing component.

[0036] The beneficial effects of this invention are:

[0037] (1) In this invention, by setting up a nut mounting mechanism, a bearing pressing mechanism, a snap ring inspection mechanism and an airtightness testing mechanism, the steering wheel tooling is clamped by the clamping mechanism during the assembly process and driven to be transported on the conveyor line. During the transport process, the assembly of each component is completed in sequence. Each functional structure is reasonably set in accordance with the process sequence, the functional areas are clearly divided, each performs its own function, and the work efficiency is improved. At the same time, compared with the traditional press work, the labor intensity is greatly reduced, the safety is improved, the installation is accurate, and the defect rate is low.

[0038] (2) In this invention, by setting up two sets of automatic assembly production devices for steering wheels, the rotary production line enables the steering wheel structure after one set of assembly work to be removed manually or by a robot, and the installation of the next set of steering wheels to be completed during the rotation process. The automation level is high and the work efficiency is greatly improved.

[0039] (3) The limiting unit cooperates with the rotating unit in the application, so that after the clamping unit completes any step assembly of the product, the limiting unit avoids, the rotating unit can automatically rotate to the angle required by the next process, and then the precise positioning is completed through the limiting mechanism, thereby improving the precision during rudder assembly, the structure is simple, and the production cost is greatly reduced.

[0040] To sum up, the device has the advantages of simple structure and assembly precision, and is especially suitable for the rudder wheel machining technical field. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0042] Figure 1 The process flow diagram of the automatic rudder wheel assembly line.

[0043] Figure 2 The structure diagram of the automatic rudder wheel assembly line.

[0044] Figure 3 The front view diagram of the automatic rudder wheel assembly line.

[0045] Figure 4 The partial front view diagram of the automatic rudder wheel assembly line Figure 1 .

[0046] Figure 5 The partial front view diagram of the automatic rudder wheel assembly line Figure 2 .

[0047] Figure 6 The top view diagram of the automatic rudder wheel assembly line.

[0048] Figure 7 The partial top view diagram of the automatic rudder wheel assembly line Figure 1 .

[0049] Figure 8 The partial top view diagram of the automatic rudder wheel assembly line Figure 2 .

[0050] Figure 9 The structure diagram of the rudder wheel shell.

[0051] Figure 10 The sectional view diagram of the rudder wheel shell.

[0052] Figure 11 The structure diagram of the nut upper mounting mechanism.

[0053] Figure 12 This is a schematic diagram of the bearing press-fitting mechanism.

[0054] Figure 13 This is a cross-sectional schematic diagram of a clasp inspection mechanism.

[0055] Figure 14 This is a cross-sectional schematic diagram of an airtightness testing facility.

[0056] Figure 15 This is a schematic diagram of the airtightness testing mechanism.

[0057] Figure 16 This is a cross-sectional schematic diagram of the clamping mechanism.

[0058] Figure 17 Schematic diagram of the clamping mechanism Figure 1 .

[0059] Figure 18 Schematic diagram of the clamping mechanism Figure 2 . Detailed Implementation

[0060] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0061] Example 1

[0062] like Figures 2 to 10 As shown, an automatic assembly line for steering wheels includes a conveyor line 1 and a carrier plate 2 that is transported backward under the guidance of the conveyor line 1. It also includes a nut mounting mechanism 3, a bearing pressing mechanism 4, a retaining ring inspection mechanism 5, and an airtightness detection mechanism 6 arranged sequentially along the direction of the conveyor line 1.

[0063] The carrier plate 2 is provided with a clamping mechanism 7. Under the clamping of the clamping mechanism 7, the components inside the steering wheel housing 100 are assembled. The steering wheel housing 100 includes a first mounting port 101, a second mounting port 102 and a third mounting port 103.

[0064] In this embodiment, by setting up a nut mounting mechanism 3, a bearing pressing mechanism 4, a retaining ring inspection mechanism 5, and an airtightness testing mechanism 6, the steering wheel tooling is clamped by a clamping mechanism 7 during the assembly process, and is driven to be transported on the conveyor line 1. During the transport process, the assembly of each component is completed in sequence. The functional structures are reasonably set up in accordance with the process sequence, the functional areas are clearly divided, each performs its own function, and the work efficiency is improved. At the same time, compared with the traditional press work, the labor intensity is greatly reduced, safety is improved, the installation is accurate, and the defect rate is low.

[0065] Furthermore, such as Figure 11 As shown, the nut mounting mechanism 3 includes:

[0066] A driving assembly 31, comprising a first driving unit 312 mounted on a rack 311 and a first torque plate connecting part 313 connected with the first driving unit 312;

[0067] A guide sleeve 32, which is matched and sleeved outside the first torque plate connecting part 313 and is mounted on the rack 311; and

[0068] An adjusting assembly 33, comprising a second torque plate connecting part 34 rotatably arranged on the guide sleeve 32 and structurally matched with the first torque plate connecting part 313, a gasket 35 located at the upper end of the second torque plate connecting part 34, and a spring 36 located at the upper end of the gasket 35 and sleeved outside the second torque plate connecting part 34;

[0069] The first driving unit 312 comprises a motor, a speed reducer 3122 arranged at the output end of the motor, and a transmission cylinder 3123 coaxial with and synchronously driven with the output end of the speed reducer 3122, and the upper end of the second torque plate connecting part 34 is arranged in the transmission cylinder 3123 through a spline structure transmission;

[0070] The lower end of the first torque plate connecting part 313 and the upper end of the second torque plate connecting part 34 are both arranged in a ratchet structure; the thickness of the gasket 35 is adjustable;

[0071] In the embodiment, by arranging the driving assembly 31 matched with the adjusting assembly 33, on the one hand, the precise rotation of the second torque plate connecting part 34 is realized by the ratchet structure meshing of the first torque plate connecting part 313 and the second torque plate connecting part 34, and on the other hand, by arranging the compression spring at the ratchet meshing position during the meshing process of the first torque plate connecting part 313 and the second torque plate connecting part 34, and installing the hexagonal wrench at the front end of the second torque plate connecting part 31, the influence of the compression spring on the rotating rod of the second torque plate connecting part 34 can be reduced, and the local jumping can be reduced; and by the torque adjusting gasket 35, the torque of the second torque plate connecting part 34 can be precisely adjusted, so that the stability and safety of the screw cap are improved, and the universality is good.

[0072] Further, as shown in Figure 12 The bearing press-fitting mechanism 4 comprises a mounting piece 41 matched with the second mounting port 102 and detachably arranged in the second mounting port 102, and a pressing piece 42 penetratingly inserted into the second mounting port 102 and matched with the mounting piece 41 to automatically press the oil seal into the second mounting port 102;

[0073] The mounting piece 41 comprises a positioning flange 411 matched with the ladder platform, an oil seal clamp 412 with an oil seal arranged in a gap with the double-row tapered roller bearing, and a rose ring 413 arranged in the oil seal clamp 412;

[0074] The top pressing piece 42 comprises a high-pressure oil cylinder 421 and an oil pressure connector 422 connected with the output end of the high-pressure oil cylinder 421, and the oil pressure connector 422 is provided with a rose block 423 matched with the rose ring 413.

[0075] In the embodiment, the oil seal is placed in the second mounting port 102 by the mounting piece 41, and then the top pressing piece 42 is inserted into the second mounting port 102 from the other side, and the mounting piece 41 is punched in the direction of the top pressing piece 42, so that the oil seal is accurately positioned, that is, the rose block 423 matches the rose ring 413. On the one hand, the rose block 423 can be freely inserted into or separated from the rose ring 413, which is convenient for disassembly and support of the mounting piece 41. On the other hand, in the assembly process, the rose block 423 and the rose ring 413 are combined to realize the combination of the split mounting piece 41 and the top pressing piece 42, and the two are connected and integrated by the reset work of the top pressing piece 42, which synchronously drives the mounting piece 41 to the position, and the structure is simple and the transmission is high.

[0076] Further, as shown in the Figure 13 The snap ring inspection mechanism 5 comprises a downward moving unit 51 and an abutting mechanism 52 elastically connected with the downward moving unit 51 and sleeved outside the downward moving unit 51.

[0077] The downward moving unit 51 comprises a tool handle 511, a tool mandrel 512, and a hexagonal socket head screw 513 for connecting the tool handle 511 and the tool mandrel 512, and a sensor is arranged on the tool mandrel 512;

[0078] The abutting mechanism 52 comprises a tool bushing of a I-shaped structure sleeved outside the tool mandrel 512;

[0079] In the embodiment, the downward moving unit 51 is arranged to abut against the expansion ring, and the downward moving unit continues to move downward to a predetermined position in the rudder housing, and then whether the compression amount generated between the elastic units is consistent with the specified expected position is used to judge whether the installation position of the expansion ring is accurately positioned.

[0080] Further, as shown in the Figures 14 to 15 The air tightness detection mechanism 6 comprises

[0081] A detection piece 61 extends to the upper end cover of the rudder housing 100 to seal, and an air tightness testing unit 64 is arranged thereon, and the air tightness testing unit detects the air tightness inside the rudder housing 100 through the detection piece 61.

[0082] A positioning member 62 is installed on both sides of the detection member 61, and the locking block 621 of the positioning member 62 is rotated to position the outer end surface of the rudder housing 100 after being positioned;

[0083] A deviation rectifying member 63 is installed below the detection member 61 and is arranged in abutment with the inner wall of the rudder housing 100;

[0084] The detection member 61 comprises a cover plate 611 and a sealing cover 612 connected below the cover plate 611 by means of bolts, and the sealing cover 612 is provided with a ventilation hole 613;

[0085] The air tightness test unit 64 comprises a test handle unit 641 installed on the upper end of the cover plate 611 and a right-angle pipe joint 642 installed on the upper end of the cover plate 611, and the right-angle pipe joint 642 is arranged in communication with the ventilation hole 613;

[0086] In this embodiment, the positioning member 62 cooperates with the detection member 61 to perform double positioning during the air tightness detection work. On the one hand, the upper end cover is sealed by the sealing cover 612, and then the lower end of the rudder housing 100 is limited by the positioning member 62, thereby realizing double limiting in the vertical direction, so as to ensure that the rudder housing 100 is accurately positioned and is not easy to shake during the air tightness test work, and the detection accuracy is high.

[0087] Further, as shown in Figures 16 to 18 The clamping mechanism 7 comprises a rotating unit 72 rotatably arranged on a support 71, a clamping unit 73 connected to one end of the rotating unit 72, and a limiting unit 74 arranged on the other side of the support 71 relative to the clamping unit 73.

[0088] When the limiting unit 74 cooperates with the rotating unit 72 to realize clamping, the rotating unit 72 stops the circumferential movement; when the rotating unit 72 loses the limiting of the limiting unit 74, the rotating unit 72 automatically moves along the circumferential direction.

[0089] The rotating unit 72 comprises a bearing seat 721 and a disc 722 connected to the outer end of the bearing seat 721, and a plurality of sets of limiting grooves 723 are arranged on the disc 722 along the circumferential direction, and a positioning sleeve is matched and installed in the limiting groove 723.

[0090] The limiting unit 74 comprises a pull pin seat 741 installed on the side wall of the support 71, a guide frame 742 installed on the pull pin seat 741, a driving member 743 rotatably arranged on the guide frame 742, and a sliding unit 744 horizontally sliding on the pull pin seat 741 under the driving of the driving member 743.

[0091] The driving component 743 includes a first rotating shaft 7431 rotatably mounted on the guide frame 742, a wrench 7432 coaxial with and fixedly connected to the first rotating shaft 7431, and a transmission block 7433 integrally connected to the lower end of the wrench 7432. The transmission block 7433 is provided with a waist groove 7434.

[0092] The sliding unit 744 includes an elastic unit a7441 fixedly connected to the support 71, a sliding rod 7443 fixedly connected to the other end of the elastic unit a7441 and sleeved outside the elastic unit a7441, and a connecting column 7442 fixedly connected to the sliding rod 7443 and sliding in the waist groove 7434.

[0093] In this embodiment, by setting a limiting unit 74 in conjunction with a rotating unit 72, after the clamping unit completes any step of the product assembly, the limiting unit 74 avoids the clamping unit, and the rotating unit 72 can automatically rotate to the angle required for the next process. Then, the limiting mechanism 4 completes the precise positioning, thereby improving the accuracy of the ship's rudder assembly. Its structure is simple and greatly reduces production costs.

[0094] It should be noted that during the assembly of the rudder ship's components, the sliding rod 7443 is placed inside the positioning sleeve 724. The limiting function of the sliding rod 7443, which can only move along its axial direction, is used to limit the disk 722, ensuring that it does not deflect after being positioned, thus improving the accuracy of assembly. When any component is assembled and the process moves to the next step, simply press the wrench 7432 to make it rotate, thereby disengaging the sliding rod 7443 from the positioning sleeve 724. The disk 722 can then be rotated manually or mechanically to adjust the angle. After the angle is adjusted, the wrench 7432 can be used to begin the next assembly step.

[0095] Furthermore, such as Figure 5 and Figure 8 As shown, it also includes a bearing inner component press 8, a bearing outer casing press 9, and a large gear press 10, which are arranged sequentially from the input end to the output end of the conveyor line 1 in front of the nut mounting mechanism 3.

[0096] It also includes an output shaft main pressing mechanism 11 disposed between the bearing pressing mechanism 4 and the retaining ring inspection mechanism 5;

[0097] It also includes a cover pressure mechanism 12 disposed between the retaining ring inspection mechanism 5 and the airtightness testing mechanism 6.

[0098] In this embodiment, the bearing inner component press 8, the bearing outer casing press 9, the large gear press 10, the output shaft main pressing mechanism 11, and the cover pressing mechanism 12 are all press structures. Workers or robots initially place the parts in approximately the correct positions, and then use the press to complete the hardening and positioning work.

[0099] Embodiment Two

[0100] As shown in FIG. 2, wherein the same or corresponding components as in Embodiment One are denoted by corresponding reference numerals, for the sake of brevity, only the differences from Embodiment One are described below. The difference between this embodiment and Embodiment One is that: Figure 6 The steering wheel automatic assembly production line is provided with two groups and is symmetrically arranged along the center of the shaft;

[0101] The conveying line 1 is provided in an elliptical structure, and a plurality of groups of the trays are sequentially and orderly transmitted along the transmission direction of the conveying line 1.

[0102] In this embodiment, by providing two groups of steering wheel automatic assembly production devices, the steering wheel structure after completing one assembly work is taken down by a worker or a mechanical hand, and the installation work of the next group of steering wheels is completed in the process of rotation, thereby greatly improving the work efficiency while improving the degree of automation.

[0103] Embodiment Three

[0104] As shown in FIG. 3, wherein the same or corresponding components as in Embodiment One are denoted by corresponding reference numerals, for the sake of brevity, only the differences from Embodiment One are described below. The difference between this embodiment and Embodiment One is that:

[0105] Figure 1 A production process of a steering wheel automatic assembly line, comprising:

[0106] Step one, primary assembly process, a worker installs the steering wheel shell 100 on the clamping unit 73, and transmits it backward under the guidance of the conveying line 1, the bearing inner assembly 104, the pull bearing outer sleeve 105, and the large gear 106 are installed by the press during the transmission process of the steering wheel shell 100, and the clamping unit 73 clamps the steering wheel shell 100 to transmit it to the next station after installation;

[0107] Step two, screw cap installation process, the driving assembly 31 drives the second torque plate connecting part 34 to rotate through the first torque plate connecting part 313, the screw cap is installed on the pinion, and the clamping unit 73 clamps the steering wheel shell 100 to rotate counterclockwise by 180° and transmits it to the next station after the screw cap 107 is installed in place;

[0108] Step two, screw cap installation process, the driving assembly 31 drives the second torque plate connecting part 34 to rotate through the first torque plate connecting part 313, the screw cap is installed on the pinion, and the clamping unit 73 clamps the steering wheel shell 100 to rotate counterclockwise by 180° and transmits it to the next station after the screw cap 107 is installed in place;

[0109] ​Step three, oil seal and output shaft installation process, the installation piece 41 cooperates with the top pressure piece 42 to automatically install the oil seal 108 into the rudder housing 100 second installation port 102, then the rudder housing 100 is transmitted backward under the guidance of the conveying line 1, the clamping unit 73 clamps the rudder housing 100 and then rotates 90° counterclockwise again, the output shaft 109 main pressing mechanism 11 presses the output shaft from bottom to top into the third installation port 103, and the output shaft is installed in place. The clamping unit 73 clamps the rudder housing 100 and transmits to the next station;

[0110] Step four, the snap ring detection process, manually put the snap ring into the slot, the abutting mechanism 52 is driven by the downward moving unit 51 to move downward through the second installation port 102 and abut against the expansion ring 110. The downward moving unit 51 continues to move downward and extends into the rudder housing to a predetermined position. The sensor outside the downward moving unit 51 measures the distance change between the downward moving unit 51 and the abutting mechanism 52 through the elastic unit change. After the rudder housing is detected, the clamping unit 73 clamps the rudder housing and rotates 90° clockwise and continues to transmit to the next station.

[0111] Step five, side cover installation process, the cover pressing mechanism 12 presses the side cover 111 into the second installation port 102. After the side cover of the rudder housing is installed in place, the clamping unit 73 clamps the rudder housing and rotates 90° clockwise and continues to transmit to the next station.

[0112] Step six, air tightness detection process, start the detection piece 61 to move downward to the appropriate position, the positioning piece 62 clamps the rudder housing 100, and the air tightness testing unit detects the air tightness inside the rudder housing 100 through the detection piece 61.

[0113] What is needed is that the embodiment takes the rudder assembly as the online research object, mainly researches the realization of the rudder assembly design, and the planning of the assembly path. First, the development status of the rudder assembly and the current path planning method are researched, and the kinematics model of the selected rudder is established and the forward and inverse kinematics solutions are solved. Through the analysis of the structure of the rudder and the artificial assembly process, the rudder assembly workstation is designed to replace the artificial assembly of the rudder. On this basis, a virtual assembly workstation is built by using software to simulate the virtual assembly of the rudder. Secondly, based on the auxiliary software, the offline programming software is developed, which mainly realizes the functions of visualization of the rudder, simulation verification of the forward and inverse kinematics solution results, path planning and simulation, and the feasibility of the rudder offline programming software. Finally, the basic path planning of the rudder assembly robot is simulated and experimentally verified. Thirdly, according to the working environment of the rudder shaft assembly and the characteristics of the eight rudder assemblies, two kinds of random sampling algorithms are selected to plan the assembly path, and the advantages and disadvantages are analyzed.

[0114] In addition, two algorithm fusions are proposed in the embodiment to give full play to respective advantages to realize path planning and obstacle avoidance of the assembly path. Finally, planning and simulation comparison and analysis are performed on the improved two-dimensional and three-dimensional environment, and an assembly experiment platform is built to verify the rudder wheel assembly scheme.

[0115] In the description of the present application, it should be understood that the terms "front", "rear", "left", "right", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0116] Of course, in the technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0117] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any changes or replacements easily thought of by those skilled in the art under the technical hints of the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An automated assembly production line for steering wheels, comprising a conveyor line and a carrier tray transported backward by the conveyor line, characterized in that, It also includes a nut mounting mechanism, a bearing pressing mechanism, a snap ring inspection mechanism, and an airtightness testing mechanism arranged sequentially along the conveyor line direction, and the carrier plate is provided with a clamping mechanism; The steering wheel housing is mounted on the clamping mechanism and adjusted to different suspension states under the rotation drive of the clamping mechanism. The clamping mechanism includes a rotating unit rotatably mounted on a support, a clamping unit connected to one end of the rotating unit, and a limiting unit disposed on one side of the support relative to the clamping unit. When the limiting unit engages with the rotating unit, the rotating unit stops its circumferential movement; when the rotating unit loses the limiting position of the limiting unit, the rotating unit moves automatically in the circumferential direction. The steering wheel housing is transferred to the nut mounting mechanism, which moves downward into the first mounting port of the steering wheel housing and rotates the nut to the mounting position. The steering wheel housing is transferred to the bearing pressing mechanism, which pushes it horizontally into the second mounting port of the steering wheel housing and installs the oil seal in place by a plug-in method. The steering wheel housing is transferred to the retaining ring inspection mechanism. The retaining ring inspection mechanism is pressed down into the first mounting port of the steering wheel housing. The retaining ring inspection mechanism uses its own extension and retraction to automatically identify the accuracy of the retaining ring in place. The steering wheel housing is transferred to the airtightness testing mechanism. The airtightness testing mechanism is pressed down into the first mounting port of the steering wheel housing. After it is in place, the airtightness testing mechanism performs double limiting on the steering wheel housing to complete the accurate airtightness test. The nut mounting mechanism includes: A drive assembly, the drive assembly including a first drive unit mounted on a frame and located above a first mounting port, and a first torque plate connecting part connected to the first drive unit; Guide sleeve, the guide sleeve being fitted over the first torque plate connecting portion and mounted on the frame; and An adjustment assembly includes a second torque plate connecting part rotatably mounted on a guide sleeve and structurally cooperating with a first torque plate connecting part, a shim located at the upper end of the second torque plate connecting part, and a spring located at the upper end of the shim and sleeved outside the second torque plate connecting part; The first drive unit includes a motor, a geared motor disposed at the output end of the motor, and a transmission cylinder coaxial with and synchronously driven by the output end of the geared motor. The upper end of the second torque plate connection is driven inside the transmission cylinder through a spline structure. The bearing press-fitting mechanism includes a mounting component that is adapted to and detachably placed in the second mounting port, and a pressing component that penetrates and is inserted into the second mounting port and cooperates with the mounting component to automatically install the oil seal into the second mounting port; The mounting components include a positioning flange that matches and engages with the ladder platform, an oil seal clamp with an internal oil seal and a clearance between it and the double-row tapered roller bearing, and a plum blossom ring built into the oil seal clamp. The top pressure component includes a high-pressure oil cylinder and a hydraulic connector that engages with the output end of the high-pressure oil cylinder. The hydraulic connector is provided with a plum blossom block that matches the plum blossom ring. The clasp inspection mechanism includes a lowering unit and a stop mechanism that is elastically connected to the lowering unit and sleeved outside the lowering unit; The airtightness testing mechanism includes: The test piece extends to the upper end cover of the steering wheel housing for sealing, and is equipped with an airtightness testing unit. The airtightness testing unit uses the test piece to test the airtightness inside the steering wheel housing. The positioning component is installed on both sides of the detection component. After it is in place, the locking block of the positioning component rotates to position the outer end face of the steering wheel housing. A correction component is installed below the detection component and is positioned to abut against the inner wall of the steering wheel housing.

2. The automated assembly production line for steering wheels according to claim 1, characterized in that, It also includes a bearing inner component press, a bearing outer casing press, and a large gear press, which are arranged sequentially from the input end to the output end of the conveyor line in front of the nut mounting mechanism.

3. The automated assembly production line for steering wheels according to claim 1, characterized in that, It also includes an output shaft main pressure mechanism disposed between the bearing pressing mechanism and the retaining ring inspection mechanism, and a cover pressing mechanism disposed between the retaining ring inspection mechanism and the airtightness testing mechanism.

4. The automated assembly production line for steering wheels according to claim 1, characterized in that, The automatic assembly production line for the steering wheel is set up in two groups and is symmetrically arranged along the axis center. The conveyor line is configured with an elliptical structure, and several groups of carrier trays are driven sequentially and orderly along the conveyor line's transmission direction.

5. The production process of an automated steering wheel assembly line as described in claims 1-4, characterized in that, include: Step 1, primary assembly process: the steering wheel housing is installed sequentially by the press to complete the installation of the bearing inner components, the bearing outer sleeve, and the large gear. After installation, the clamping unit clamps the steering wheel housing and transfers it to the next station. Step 2, nut installation process: The drive assembly drives the second torque plate connection to rotate through the first torque plate connection. The nut is installed on the pinion. After the nut is installed in place, the clamping unit clamps the steering wheel housing and rotates it counterclockwise by 180° and transfers it to the next station. Step 3, oil seal and output shaft installation process: The mounting component, together with the top pressing component, automatically installs the oil seal into the second mounting port of the steering wheel housing. Then, the steering wheel housing is transported backward under the guidance of the conveyor line. After the clamping unit clamps the steering wheel housing, it rotates 90° counterclockwise again. The main pressing mechanism of the output shaft presses the output shaft into the third mounting port from bottom to top. After the output shaft is installed in place, the clamping unit clamps the steering wheel housing and transports it to the next station. Step four, the retaining ring inspection process: the retaining ring is manually placed into the groove, and the abutting mechanism, driven by the lowering unit, moves down through the second mounting port to abut the expansion ring. The lowering unit continues to move down and extends into the predetermined position inside the steering wheel housing. The sensor outside the lowering unit measures the change in distance between the lowering unit and the abutting mechanism through the change in elasticity. After the steering wheel housing is inspected, the clamping unit clamps the steering wheel housing and rotates it 90° clockwise and continues to transfer it to the next station. Step 5, side cover installation process: The pressing mechanism presses the side cover into the second installation port. After the side cover of the steering wheel housing is installed in place, the clamping unit clamps the steering wheel housing and rotates it 90° clockwise and continues to transfer it to the next station. Step six, airtightness testing process: The testing component moves downward to a suitable position, the positioning component clamps the steering wheel housing, and the airtightness testing unit tests the airtightness inside the steering wheel housing through the testing component.

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