A mounting device for a steering gear extension bar

Abstract

This invention relates to the field of steering system technology, specifically to an installation device for steering gear extension rods. The installation device includes a frame, characterized in that: a work platform is provided on the frame, a transmission line is connected to the work platform, and a steering gear workpiece positioning tray is connected to the transmission line; a feeding mechanism assembly is provided on the work platform in front of the steering gear workpiece positioning tray, and a pressing mechanism assembly is provided on the work platform behind the steering gear workpiece positioning tray; the left and right sides of the pressing mechanism assembly are respectively provided with a left rack and housing clamping and positioning mechanism and a right rack and housing clamping and positioning mechanism. Compared with the prior art, this effectively solves the problem of automatic assembly of steering gear extension rod products. The flexible tooling design and the servo control with multi-axis movement meet the assembly requirements of different product models; the precise positioning of the tooling and the reasonable process control design logic ensure the stability of the assembly.

Description

Technical Field

[0001] This invention relates to the field of steering system technology, specifically to a mounting device for a steering gear extension rod. Background Technology

[0002] After the short main body of the steering gear is assembled, an extension rod needs to be installed on the input shaft of the sensor unit. The installation requirements are as follows: First, adjust the steering gear rack to the middle position, ensuring that the distance from the rack end face to the housing hard limit is the same at both ends. Then, press the extension rod into the input shaft according to the installation depth, angle, and force specified in the drawings. Finally, rivet the extension rod at two points according to the riveting positions, depth, and force specified in the drawings. Specialized equipment must be used for... Figure 1 Only by monitoring and evaluating the key parameters shown can a qualified steering gear that meets the requirements of the drawings be assembled, and the steering wheel angles can be the same when it is installed and debugged on the vehicle.

[0003] Given the stringent product design requirements for extension rod installation, and the fact that some processes are difficult to achieve large-scale, streamlined operations and stable quality control through manual labor, this specialized extension rod installation machine aims to automate the installation and process monitoring of extension rods, ensuring that the assembly results meet the requirements of the product design drawings. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, this invention provides an installation device for steering gear extension rods, which effectively solves the problem of automatic assembly of steering gear extension rod products.

[0005] To achieve the above objectives, an installation device for a steering gear extension rod is designed, comprising a frame, characterized in that: a working platform is provided on the frame, a transmission line is connected to the working platform, and a steering gear workpiece positioning tray is connected to the transmission line; a feeding mechanism assembly is provided on the working platform in front of the steering gear workpiece positioning tray, and a pressing mechanism assembly is provided on the working platform behind the steering gear workpiece positioning tray; the left and right sides of the pressing mechanism assembly are respectively provided with a left rack and housing clamping mechanism and a left positioning mechanism, and a right rack and housing clamping mechanism and a right positioning mechanism.

[0006] The pressing mechanism assembly includes a pressing mechanism base, a pressing mechanism forward and backward movement servo assembly, a pressing mechanism left and right movement servo assembly, a pressing mechanism angle swing servo assembly, a pressing mechanism up and down movement servo assembly, a Kistler press, a floating mechanism assembly, and a C-frame riveting assembly. The bottom of the pressing mechanism base is fixedly connected to the work platform. The pressing mechanism base is connected to the bottom of connecting bracket one through the pressing mechanism forward and backward movement servo assembly. The top of connecting bracket one is connected to the bottom of connecting bracket two through the pressing mechanism left and right movement servo assembly. The top of connecting bracket two is provided with a pressing mechanism angle swing servo assembly. The front end of the pressing mechanism angle swing servo assembly is connected to the pressing mechanism up and down movement servo assembly through connecting bracket three. The front end of the pressing mechanism up and down movement servo assembly is connected to the press connecting seat. The Kistler press is connected to the upper part of the press connecting seat. The pressing head of the Kistler press is connected to the floating mechanism assembly. The C-frame riveting assembly is provided below the floating mechanism assembly.

[0007] The bottom of the steering gear workpiece positioning tray is equipped with a lifting mechanism;

[0008] The installation process for the equipment is as follows:

[0009] S1, the steering gear workpiece is transferred on the steering gear workpiece positioning tray of the transmission line. When it is transferred to the installation position, the steering gear workpiece positioning tray is stopped and the lifting mechanism lifts the steering gear workpiece positioning tray to the designated position.

[0010] S2, the left rack and housing are clamped, the left positioning mechanism and the right rack and housing are clamped, and the right positioning mechanism positions and clamps the housing of the steering gear workpiece;

[0011] S3, the left rack and housing are clamped, the left positioning mechanism and the right rack and housing are clamped, the right positioning mechanism drives the push rod inside the steering gear workpiece to push the rack, the left rack and housing are clamped, the grating ruler of the left positioning mechanism records the rack position in real time, and finally positions the rack at the middle position equal to the limit distance inside the housing;

[0012] S4, the operator manually picks up an extension rod and places it on the positioning fixture of the feeding mechanism component. The feeding mechanism component automatically transfers it to the pressing mechanism component. The floating mechanism component on the pressing mechanism component positions the extension rod. The extension rod angle servo component on the pressing mechanism component rotates the extension rod circumferentially to the installation angle. The chuck on the floating mechanism component clamps the extension rod.

[0013] S5, the pressing mechanism assembly's forward and backward movement servo component, left and right movement servo component, angle swing servo component, and up and down movement servo component drive the extension rod to the installation angle and position. The input shaft clamping jaws on the floating mechanism assembly clamp the input shaft. The floating mechanism assembly pre-presses the external spline of the input shaft. The extension rod angle servo component slightly rotates the extension rod, using the weight of the floating pressure head to achieve the internal and external spline engagement. After triggering the engagement signal, the Kistler press begins to press the extension rod to the set position. During the pressing process, the Kistler monitoring instrument collects displacement and force data in real time and performs a pass / fail assessment.

[0014] S6, the rivet head fixture on the C-frame rivet assembly is pressed against the extension rod, the TOX riveting cylinder is pressurized to the set riveting pressure to complete the riveting of the two points. During the riveting process, the Kistler monitoring instrument collects displacement and force data in real time and performs a pass / fail assessment.

[0015] S7. After the process is completed, the equipment automatically returns to its original position and releases the qualified assembled steering gear workpiece to the next station.

[0016] The floating mechanism assembly includes an extension rod angle servo assembly, a servo drive pulley assembly, an extension rod contour sleeve fixture, an extension rod clamping jaw, and an extension rod clamping cylinder. The extension rod angle servo assembly is located on one side of the press head of the Kistler press. The bottom of the extension rod angle servo assembly is connected to a rotating shaft via the servo drive pulley assembly. The bottom of the rotating shaft is connected to the extension rod contour sleeve fixture. The extension rod clamping jaw is located below the extension rod contour sleeve fixture. The rear of the extension rod clamping jaw is connected to the extension rod clamping cylinder.

[0017] The upper part of the rotating shaft is connected to a rotating disk, and an angle signal detection sensor is provided above the rotating disk; the top of the rotating shaft is connected to the pressure head by a spring.

[0018] The floating mechanism assembly is slidably connected to the press connecting seat via a slider assembly.

[0019] The C-frame riveting assembly includes a TOX riveting cylinder, a riveting pressure acquisition sensor, a riveting head, a riveting depth acquisition displacement sensor, a C-frame, and a TOX riveting cylinder moving cylinder. The C-frame is located at the lower part of the press connecting seat. The bottom of the C-frame is connected to the TOX riveting cylinder moving cylinder via a slider assembly. The TOX riveting cylinder moving cylinder is fixedly connected to the press connecting seat. A left riveting head and a right riveting head are respectively located at the left and right ends inside the C-frame. The right riveting head is fixedly connected to the C-frame, and the tail of the left riveting head passes through the C-frame and connects to the piston rod of the TOX riveting cylinder. A riveting pressure acquisition sensor is located at the upper part between the left riveting head and the piston rod of the TOX riveting cylinder. A riveting depth acquisition displacement sensor is located on the C-frame above the left and right riveting heads.

[0020] The input shaft clamping jaw is located below the left and right rivet heads. The other end of the input shaft clamping jaw is connected to the jaw clamping cylinder, which is fixedly connected to the press connecting seat.

[0021] The loading mechanism assembly includes a loading mechanism base, a left and right translation cylinder, a double-layer front and rear movement cylinder, a sliding lifting cylinder, a slide table assembly, a support frame, an extension rod V-shaped positioning block, an extension rod support block, a gripper, a clamping cylinder, and a rotating cylinder. The bottom of the loading mechanism base is fixedly connected to the work platform. The bottom and sides of the double-layer front and rear movement cylinder and the third slide table assembly are connected to the loading mechanism base via the left and right translation cylinder, the first slide table assembly, the lifting cylinder, and the second slide table assembly. The top of the double-layer front and rear movement cylinder and the third slide table assembly is connected to the support frame. An extension rod V-shaped positioning block is provided on one side of the top of the support frame, and an extension rod support block is provided on the other side of the top of the support frame. A gripper is provided on one side of the extension rod support block, and a clamping cylinder is connected to the bottom of the gripper. The clamping cylinder is connected to the rotating cylinder, and the rotating cylinder is connected to the support frame.

[0022] Photoelectric sensors are installed on both sides of the top of the V-shaped positioning block of the extension rod.

[0023] The left rack and housing clamping and positioning mechanism has the same structure as the right rack and housing clamping and positioning mechanism. The right rack and housing clamping and positioning mechanism includes a rack and housing positioning base, a rack and housing positioning front drive cylinder, a rack and housing positioning front drive slide rail, a rack and housing positioning connecting plate, a housing clamping drive servo motor assembly, a rack and housing positioning clamping slide rail, a housing clamping connecting plate, a rack push rod drive servo motor assembly, a grating ruler, a rack positioning fixture, and a housing clamping fixture. The bottom of the rack and housing positioning base is fixedly connected to the work platform, and the rack and housing positioning base is equipped with a rack and housing positioning front drive slide rail. A rack and housing positioning connecting plate is slidably connected on the rack and housing positioning front drive slide rail. The rear end of the rack and housing positioning connecting plate is connected to the rack and housing positioning front drive cylinder. The front end of the rack and housing positioning connecting plate is connected to the first rack push rod drive servo motor assembly. The front end of the first rack push rod drive servo motor assembly is connected to the housing clamping connecting plate through a slider assembly. A second rack push rod drive servo motor assembly is provided on one side in front of the housing clamping connecting plate. The second rack push rod drive servo motor assembly is connected to one end of the rack positioning fixture through a slider assembly. The other end of the rack positioning fixture is connected to the housing clamping fixture. A grating ruler is provided on the rear side of the rack positioning fixture.

[0024] One end of the housing clamping fixture is connected to the rack positioning fixture, and the other end of the housing clamping fixture passes laterally through the housing clamping connecting plate and is located on the outside of the housing clamping connecting plate.

[0025] Compared with the prior art, this invention provides an installation device for steering gear extension rods, which effectively solves the problem of automatic assembly of steering gear extension rod products. The tooling design is flexible and the servo motor with multi-axis movement meets the assembly requirements of different models of products. The tooling is accurately positioned and the process control design logic is reasonable, which ensures the stability of the assembly. At the same time, the detection and monitoring of multiple key parameters ensures the quality requirements of the assembled products. Attached Figure Description

[0026] Figure 1 A schematic diagram of the extension rod being press-fitted onto the steering gear workpiece.

[0027] Figure 2 This is a schematic diagram of the overall structure of the present invention.

[0028] Figure 3 This is a flowchart of the workflow of the present invention.

[0029] Figure 4 This is a three-dimensional view of the feeding mechanism component in this invention.

[0030] Figure 5 for Figure 4 A magnified view of a portion of the image.

[0031] Figure 6 This is a perspective view of the left rack and housing clamping and positioning mechanism and the right rack and housing clamping and positioning mechanism in this invention.

[0032] Figure 7 This is a three-dimensional view of the right-side rack and the housing clamping and positioning mechanism.

[0033] Figure 8 This is a front view of the right-side rack and housing clamping and positioning mechanism.

[0034] Figure 9 This is a top view of the right rack and housing clamping and positioning mechanism.

[0035] Figure 10 Flowchart for clamping and positioning the rack and housing.

[0036] Figure 11 This is a three-dimensional view of the pressing mechanism component in this invention.

[0037] Figure 12 This is a schematic diagram of the floating mechanism component in the pressing mechanism assembly.

[0038] Figure 13 for Figure 12 A magnified view of a portion of the image.

[0039] Figure 14 for Figure 13 An enlarged diagram of A in the diagram.

[0040] Figure 15 for Figure 13 Enlarged diagram of B in the diagram.

[0041] Figure 16 This is a schematic diagram of the C-frame rivet assembly in the pressing mechanism.

[0042] Figure 17 This is a schematic diagram of the rivet head structure in the C-frame rivet assembly.

[0043] Figure 18 This is a schematic diagram of the input shaft clamping structure in the C-frame riveting assembly. Detailed Implementation

[0044] The invention will now be further described with reference to the accompanying drawings.

[0045] like Figure 1As shown, after the short main body of the steering gear is assembled, an extension rod needs to be installed on the input shaft of the sensor unit. The installation requirements are as follows: First, adjust the steering gear rack to the middle position, ensuring that the distance from the rack end face to the housing hard limit is the same at both ends. Then, press the extension rod into the input shaft according to the installation depth, angle, and force required by the drawing. Finally, rivet the extension rod at two points according to the riveting position, depth, and force required by the drawing. Specialized equipment must monitor and evaluate several key parameters to assemble a qualified steering gear that meets the drawing requirements. This ensures that the steering wheel angles are the same when installed and debugged on the vehicle laterally.

[0046] like Figure 2 As shown, a working platform 2 is provided on the frame 1, and a transmission line 3 is connected to the working platform 2. A steering gear workpiece positioning tray 4 is connected to the transmission line 3. A feeding mechanism assembly 6 is provided on the working platform 2 in front of the steering gear workpiece positioning tray 4, and a pressing mechanism assembly 7 is provided on the working platform 2 behind the steering gear workpiece positioning tray 4. The left and right sides of the pressing mechanism assembly 7 are respectively provided with a left rack and housing clamping mechanism 8 and a right rack and housing clamping mechanism 9. A lifting mechanism is provided at the bottom of the steering gear workpiece positioning tray 4.

[0047] Figure 3 As shown, the workflow of the installation device of this invention is as follows:

[0048] S1, the steering gear workpiece 5 is transferred on the steering gear workpiece positioning tray 4 of the transmission line 3. When it is transferred to the installation position, the steering gear workpiece positioning tray 4 is stopped and the lifting mechanism lifts the steering gear workpiece positioning tray 4 to the designated position.

[0049] S2, the left rack and housing are clamped, the left positioning mechanism 8 and the right rack and housing are clamped, and the right positioning mechanism 9 positions and clamps the housing of the steering gear workpiece 5;

[0050] S3, the left rack and housing are clamped, the left positioning mechanism 8 and the right rack and housing are clamped, the right positioning mechanism 9 drives the push rod inside the steering gear workpiece 5 to push the rack, the left rack and housing are clamped, the grating ruler of the left positioning mechanism 8 records the rack position in real time, and finally positions the rack at the middle position equal to the limit distance inside the housing;

[0051] S4, the operator manually picks up an extension rod 10 and places it on the positioning fixture of the feeding mechanism assembly 6. The feeding mechanism assembly 6 automatically transfers it to the pressing mechanism assembly 7. The floating mechanism assembly 7-7 on the pressing mechanism assembly 7 positions the extension rod 10. The extension rod angle servo assembly 7-7-1 on the pressing mechanism assembly 7 rotates the extension rod 10 circumferentially to the installation angle. The chuck on the floating mechanism assembly 7-7 clamps the extension rod 10.

[0052] S5, the pressing mechanism assembly 7's pressing mechanism forward and backward movement servo assembly 7-2, pressing mechanism left and right movement servo assembly 7-3, pressing mechanism angle swing servo assembly 7-4, and pressing mechanism up and down movement servo assembly 7-5 drive the extension rod 10 to move to the installation angle and position. The input shaft clamping jaw 7-8-8 on the floating mechanism assembly 7-7 clamps the input shaft. The floating mechanism assembly 7-7 pre-presses the external spline of the input shaft. The extension rod angle servo assembly 7-7-1 slightly rotates the extension rod, using the weight of the floating pressure head to achieve the internal and external spline recognition. After triggering the recognition signal, the Kistler press 7-6 begins to press the extension rod 10 to the set position. During the pressing process, the Kistler monitoring instrument collects displacement and force data in real time and performs qualification evaluation.

[0053] S6, the rivet head fixture on the C-frame rivet assembly 7-8 is pressed against the extension rod 10, the TOX riveting cylinder 7-8-1 is pressurized to the set riveting pressure to complete the riveting of the two points. During the riveting process, the Kistler monitoring instrument collects displacement and force data in real time and performs a qualification assessment.

[0054] S7. After the process is completed, the equipment automatically returns to its original position and releases the qualified assembled steering gear workpiece to the next station.

[0055] I. Feeding Mechanism Components

[0056] like Figure 4 , Figure 5 As shown, the feeding mechanism assembly 6 includes a feeding mechanism base, left and right translation cylinders, a slide assembly, a double-layer front and rear movement cylinder, a lifting cylinder, a support frame, an extension rod V-shaped positioning block, an extension rod support block, grippers, a clamping cylinder, and a rotating cylinder. The bottom of the feeding mechanism base 6-1 is fixedly connected to the work platform 2. The double-layer front and rear movement cylinder and the second slide assembly 6-1 are respectively connected to the feeding mechanism base 6-1 through the left and right translation cylinder, the first slide assembly 6-2 and the lifting cylinder, and the third slide assembly 6-4. -3's bottom and sides, double-layer front and rear moving cylinder, the top of the second slide assembly 6-3 is connected to the support frame 6-5, the support frame 6-5 has an extension rod V-shaped positioning block 6-10 on one side of the top of the support frame 6-5, the support frame 6-5 has an extension rod support block 6-9 on the other side of the top of the support frame 6-5, a gripper 6-8 is located on one side of the extension rod support block 6-9, the bottom of the gripper 6-8 is connected to the clamping cylinder 6-7, the clamping cylinder 6-7 is connected to the rotating cylinder 6-6, and the rotating cylinder 6-6 is connected to the support frame 6-5.

[0057] Photoelectric sensors 6-11 are respectively installed on both sides of the top of the V-shaped positioning block 6-10 on the extension rod.

[0058] During operation, the operator places the extension rod 10 into the V-shaped positioning block 6-10 and the support block 6-9, presses the start button, and the photoelectric sensor 6-11 detects whether the angle of the extension rod 10 is correct. The clamping cylinder 6-7 clamps the extension rod 10, and the rotating cylinder 6-6 rotates 90° until the extension rod 10 is in a vertical position. Through the left-right translation cylinder, the first slide assembly 6-2, the lifting cylinder, and the third slide assembly 6-4, the extension rod is automatically transported to the pressing mechanism assembly 7 for gripping. The use of a long-stroke translation cylinder reduces the operator's walking distance, while the use of a double-layer forward-backward movement cylinder and the second slide assembly 6-3 increases the automatic transport distance of the extension rod 10. The V-shaped positioning block 6-10 and the support block 6-9 define the placement state of the extension rod 10, and the photoelectric sensor 6-11 detects whether this placement state is correct.

[0059] II. Clamping and positioning mechanisms for the left rack and housing, and the right rack and housing.

[0060] like Figures 6 to 10 As shown, the left rack and housing clamping and positioning mechanism 8 has the same structure as the right rack and housing clamping and positioning mechanism 9. The right rack and housing clamping and positioning mechanism 9 includes a rack and housing positioning base, a rack and housing positioning front drive cylinder, a rack and housing positioning front drive slide rail, a rack and housing positioning connecting plate, a housing clamping drive servo motor assembly, a rack and housing positioning clamping slide rail, a housing clamping connecting plate, a rack push rod drive servo motor assembly, a grating ruler, a rack positioning fixture, and a housing clamping fixture. The bottom of the rack and housing positioning base 9-1 is fixedly connected to the working platform 2. The rack and housing positioning base 9-1 is provided with a rack and housing positioning front drive slide rail 9-3, on which the rack and housing positioning front drive slide rail 9-3 slides. A rack and housing positioning connecting plate 9-4 is connected. The rear end of the rack and housing positioning connecting plate 9-4 is connected to the rack and housing positioning front drive cylinder 9-2. The front end of the rack and housing positioning connecting plate 9-4 is connected to the first rack push rod drive servo motor assembly 9-5. The front end of the first rack push rod drive servo motor assembly 9-5 is connected to the housing clamping connecting plate 9-6 through a slider assembly. A second rack push rod drive servo motor assembly 9-7 is provided on one side in front of the housing clamping connecting plate 9-6. The second rack push rod drive servo motor assembly 9-7 is connected to one end of the rack positioning fixture 9-9 through a slider assembly. The other end of the rack positioning fixture 9-9 is connected to the housing clamping fixture 9-10. A grating ruler 9-8 is provided on the rear side of the rack positioning fixture 9-9.

[0061] One end of the housing clamping fixture 9-10 is connected to the rack positioning fixture 9-9, and the other end of the housing clamping fixture 9-10 passes through the housing clamping connecting plate 9-6 laterally and is located on the outside of the housing clamping connecting plate 9-6.

[0062] During operation, the left rack and housing are clamped together, the left positioning mechanism 8 is clamped together with the right rack and housing, and the right positioning mechanism 9 is driven forward to the same axis position as the front housing. The left rack and housing are clamped together, the left positioning mechanism 8 is clamped together with the right rack and housing, and the right positioning mechanism 9 is driven by the rack push rod drive servo motor assembly on both sides to clamp the housing. Then, the left rack and housing are clamped together, the left positioning mechanism 8 is clamped together with the right rack and housing, and the right positioning mechanism 9 is driven by the rack push rod drive servo motor assembly on both sides to move the rack to the left and right respectively to the limit position inside the housing. The position of the grating ruler is recorded respectively, and the closed-loop feedback is given to the rack push rod drive servo to position the rack to the center position.

[0063] like Figure 10 The following is a schematic illustration of the rack centering adjustment process: The right-side servo-driven rack pusher fixture pushes the rack until its surface touches the inner limit surface of the housing. Then, the left-side pusher fixture, driven by the servo, presses against the rack, ensuring no gap between the rack and the pusher fixtures on both sides. This is position one, and the left and right positions are recorded as A1 and B1 by the grating ruler. The right pusher returns to its original position under the servo drive, and the left-side pusher fixture pushes the rack until its surface touches the inner limit surface of the housing. Then, the right-side pusher fixture, driven by the servo drive, presses against the rack, ensuring no gap between the rack and the pusher fixtures on both sides. This is position two, and the left and right positions are recorded as A2 and B2 by the grating ruler. The left pusher, driven by the servo drive, returns to position A3 on the grating ruler, i.e., (A2-A1) / 2. Then, the right-side pusher fixture, driven by the servo drive, pushes the rack against the left-side pusher fixture surface, ensuring no gap between the rack and the pusher fixtures on both sides. This is position three. At this point, the two ends of the rack are equidistant from the inner limiting surface of the housing.

[0064] III. Pressing Mechanism Components

[0065] like Figures 11 to 18As shown, the pressing mechanism assembly 7 includes a pressing mechanism base 7-1, a pressing mechanism forward and backward movement servo assembly 7-2, a pressing mechanism left and right movement servo assembly 7-3, a pressing mechanism angle swing servo assembly 7-4, a pressing mechanism up and down movement servo assembly 7-5, a Kistler press 7-6, a floating mechanism assembly 7-7, and a C-frame riveting point assembly 7-8. The bottom of the pressing mechanism base 7-1 is fixedly connected to the work platform 2. The pressing mechanism base 7-1 is connected to the bottom of the connecting bracket 7-9 via the pressing mechanism forward and backward movement servo assembly 7-2. The top of the connecting bracket 7-9 is connected via the pressing mechanism left and right movement servo assembly 7-3. Component 7-3 is connected to the bottom of connecting bracket 2 7-10. The top of connecting bracket 2 7-10 is provided with a pressing mechanism angle swing servo component 7-4. The front end of the pressing mechanism angle swing servo component 7-4 is connected to the pressing mechanism up and down movement servo component 7-5 through connecting bracket 3 7-11. The front end of the pressing mechanism up and down movement servo component 7-5 is connected to the press connecting seat 7-12. The upper part of the press connecting seat 7-12 is connected to the Kistler press 7-6. The press head of the Kistler press 7-6 is connected to the floating mechanism component 7-7. The C-shaped frame rivet point component 7-8 is provided below the floating mechanism component 7-7.

[0066] The floating mechanism assembly 7-7 includes an extension rod angle servo assembly, a servo drive pulley assembly, an extension rod contour sleeve tooling, an extension rod clamping jaw, and an extension rod clamping cylinder. The extension rod angle servo assembly 7-7-1 is located on one side of the press head 7-6-1 of the Kistler press 7-6. The bottom of the extension rod angle servo assembly 7-7-1 is connected to the rotating shaft 7-7-5 through the servo drive pulley assembly 7-7-2. The bottom of the rotating shaft 7-7-5 is connected to the extension rod contour sleeve tooling 7-7-4. The extension rod clamping jaw 7-7-6 is located below the extension rod contour sleeve tooling 7-7-4. The rear of the extension rod clamping jaw 7-7-6 is connected to the extension rod clamping cylinder 7-7-7. The upper part of the rotating shaft 7-7-5 is connected to the rotating disk 7-7-8, and an angle signal detection sensor 7-7-9 is provided above the rotating disk 7-7-8; the top of the rotating shaft 7-7-5 is connected to the pressure head 7-6-1 by a spring.

[0067] The floating mechanism assembly 7-7 is slidably connected to the press connecting seat 7-12 via the slider assembly.

[0068] The C-frame riveting assembly 7-8 includes a TOX riveting cylinder, a riveting pressure sensor, a riveting head, a riveting depth sensor, a C-frame, and a TOX riveting cylinder moving cylinder. A C-frame 7-8-6 is located at the lower part of the press connecting seat 7-12. The bottom of the C-frame 7-8-6 is connected to the TOX riveting cylinder moving cylinder 7-8-7 via a slider assembly. The TOX riveting cylinder moving cylinder 7-8-7 is fixedly connected to the press connecting seat 7-12. Left riveting heads 7-8 are located at the left and right ends of the inner side of the C-frame 7-8-6. -3 and the right riveting head 7-8-4, the right riveting head 7-8-4 is fixedly connected to the C-frame 7-8-6, the tail of the left riveting head 7-8-3 passes through the C-frame 7-8-6 and connects to the piston rod of the TOX riveting cylinder 7-8-1; a riveting pressure acquisition sensor 7-8-2 is provided on the upper part between the piston rod of the left riveting head 7-8-3 and the TOX riveting cylinder 7-8-1, and a riveting point depth acquisition displacement sensor 7-8-5 is provided on the C-frame 7-8-6 above the left riveting head 7-8-3 and the right riveting head 7-8-4. One end of the input shaft clamping jaw 7-8-8 is located below the left riveting head 7-8-3 and the right riveting head 7-8-4, and the other end of the input shaft clamping jaw 7-8-8 is connected to the jaw clamping cylinder 7-8-9, which is fixedly connected to the press connecting seat 7-12.

[0069] The in-situ signal detection of the angle swing servo component 7-4 of the pressing mechanism ensures that the initial angle of the extension rod contour sleeve tooling 7-7-4 is at zero degrees. The Kistler press 7-6 drives the extension rod contour sleeve tooling 7-7-4 to move downwards. After the sleeve is engaged with the extension rod 10, the angle swing servo component 7-4 of the pressing mechanism rotates the extension rod 10 to the installation angle. The extension rod clamping jaws 7-7-6 clamp the extension rod 10. The servo-driven pressing mechanism component 7 moves downwards to the set height. The input shaft clamping jaws 7-8-8 clamp the input shaft (function: to prevent the pressing force from being transmitted to the sensor unit and the steering mechanism during subsequent spline pressing, protecting the product and stabilizing the pressing process). The Kistler press 7-6 moves downwards to the pre-pressing state of the floating mechanism component 7-7. The extension rod angle servo component 7-7-1 rotates slightly clockwise / counterclockwise to the set angle. At this time, the spline is recognized by the weight of the floating mechanism component 7-7. After triggering the spline recognition signal, the PLC collects the angle data of the rotation servo at this time and judges whether it is within the set angle range. After the angle requirement is met, the Kistler press 7-6 drives the press head 7-6-1 to act on the top of the floating mechanism component 7-7, thereby transmitting the force to the sleeve and extension rod 10. The Kistler press 7-6 moves from the starting position to the set displacement position. During this process, the Kistler press 7-6 transmits the displacement and force data to the Kistler monitoring instrument in real time, generates the displacement-force curve function, and judges whether the curve meets the requirements of the standard evaluation box. After pressing is completed, the TOX riveting cylinder 7-8-1, driven by the TOX riveting cylinder moving cylinder 7-8-7, causes the left riveting head 7-8-3 and the right riveting head 7-8-4 to adhere to the extension rod 10. The TOX riveting cylinder 7-8-1 slowly increases the pressure to the set pressure under hydraulic action. During this process, the riveting pressure acquisition sensor 7-8-2 and the riveting point depth acquisition displacement sensor 7-8-5 transmit the pressure and displacement to the Kistler monitoring instrument in real time, respectively, to generate a displacement-force curve function and to judge whether the curve meets the requirements of the standard evaluation box.

[0070] During the rotary servo tooth recognition process, when the Kistler press 7-6 is pressed down to the set position, the entire floating mechanism assembly 7-7 and the mandrel sleeve are separated from the inner step of the press head 7-6-1 by a certain distance due to the misalignment of the external spline of the input shaft and the internal spline of the extension rod 10. At this time, the weight of the floating mechanism assembly 7-7 is entirely on the input shaft, instead of being attached to the inner step of the press head 7-6-1. The spline recognition sensor on the floating mechanism assembly 7-7 senses the output signal of the press head 7-6-1. Then, the extension rod angle servo assembly 7-7-1 slowly rotates a small set angle. During this process, under the action of the weight of the floating mechanism assembly 7-7, the internal spline and the external spline are aligned and recognized. At this time, the mandrel sleeve of the floating mechanism assembly 7-7 and the inner step of the press head 7-6-1 are in contact and attached again. The spline recognition sensor can no longer sense the press head fixture and output a signal. The angle rotation servo records the current tooth recognition angle, which is the installation angle.

[0071] The TOX riveting cylinder moving cylinder 7-8-7 and the C-frame 7-8-6 are fixedly connected. The right riveting head 7-8-4 is fixed on the C-frame 7-8-6, and the left riveting head 7-8-3 is connected to the piston rod of the TOX riveting cylinder 7-8-1. The working process is as follows: The TOX riveting cylinder moving cylinder 7-8-7 extends, driving the C-frame 7-8-6 and the TOX riveting cylinder 7-8-1 to move to the left, so that the right riveting head 7-8-4 is against the extension rod 10. Then, when the piston rod of the TOX riveting cylinder 7-8-1 is under low pressure, it drives the left riveting head 7-8-3 to extend and be against the extension rod 10. At this time, the TOX riveting cylinder 7-8-1 starts pressurizing to complete the riveting. The two riveting points are designed with the C-frame 7-8-6, which can achieve synchronous pressure on both sides of the riveting points, balanced force, and avoid excessive shearing and bending of the extension rod 10 during the riveting process, thus ensuring the riveting effect and product quality. Furthermore, the rivet head is selected using wire riveting to ensure that the actual rivet depth is consistent with the requirements of the drawing.

[0072] This invention relates to a press-fitting machine that effectively solves the problem of automatic assembly in the design of such products. The flexible tooling design and the servo motor with multi-axis movement meet the assembly requirements of different product models. The precise positioning of the tooling and the reasonable process control design logic ensure the stability of the assembly. At the same time, the detection, monitoring and evaluation of multiple key parameters ensure the quality requirements of the assembled products.

Claims

1. A mounting device for a steering gear extension rod, comprising a frame, characterized in that: A work platform (2) is provided on the frame (1), and a transmission line (3) is connected to the work platform (2). A steering gear workpiece positioning tray (4) is connected to the transmission line (3). A feeding mechanism assembly (6) is provided on the work platform (2) in front of the steering gear workpiece positioning tray (4), and a pressing mechanism assembly (7) is provided on the work platform (2) behind the steering gear workpiece positioning tray (4). The left and right sides of the pressing mechanism assembly (7) are respectively provided with a left rack and housing clamping and a left positioning mechanism (8) and a right rack and housing clamping and a right positioning mechanism (9). The pressing mechanism assembly (7) includes a pressing mechanism base (7-1), a pressing mechanism forward and backward movement servo assembly (7-2), a pressing mechanism left and right movement servo assembly (7-3), a pressing mechanism angle swing servo assembly (7-4), a pressing mechanism up and down movement servo assembly (7-5), a Kistler press (7-6), a floating mechanism assembly (7-7), and a C-frame riveting assembly (7-8). The bottom of the pressing mechanism base (7-1) is fixedly connected to the work platform (2). The pressing mechanism base (7-1) is connected to the bottom of the connecting bracket (7-9) through the pressing mechanism forward and backward movement servo assembly (7-2). The top of the connecting bracket (7-9) is connected to the pressing mechanism left and right movement servo assembly (7-2). Component (7-3) is connected to the bottom of connecting bracket two (7-10). The top of connecting bracket two (7-10) is provided with a pressing mechanism angle swing servo assembly (7-4). The front end of the pressing mechanism angle swing servo assembly (7-4) is connected to the pressing mechanism up and down movement servo assembly (7-5) through connecting bracket three (7-11). The front end of the pressing mechanism up and down movement servo assembly (7-5) is connected to the press connecting seat (7-12). The upper part of the press connecting seat (7-12) is connected to the Kistler press (7-6). The press head of the Kistler press (7-6) is connected to the floating mechanism assembly (7-7). The C-shaped frame rivet assembly (7-8) is provided below the floating mechanism assembly (7-7). The bottom of the steering gear workpiece positioning tray (4) is provided with a lifting mechanism; The installation process for the equipment is as follows: S1, the steering gear workpiece (5) is transferred on the steering gear workpiece positioning tray (4) of the transmission line (3). When it is transferred to the installation position, the steering gear workpiece positioning tray (4) is stopped, and the lifting mechanism lifts the steering gear workpiece positioning tray (4) to the designated position. S2, the left rack and housing are clamped, the left positioning mechanism (8) and the right rack and housing are clamped, and the right positioning mechanism (9) positions and clamps the housing of the steering gear workpiece (5); S3, the left rack and housing are clamped, the left positioning mechanism (8) and the right rack and housing are clamped, the right positioning mechanism (9) drive the push rod inside the steering machine workpiece (5) to push the rack, the grating ruler of the left rack and housing clamped, the left positioning mechanism (8) records the rack position in real time, and finally positions the rack at the middle position equal to the limit distance inside the housing; S4, the operator manually picks up an extension rod (10) and places it on the positioning fixture of the feeding mechanism assembly (6). The feeding mechanism assembly (6) automatically transfers it to the pressing mechanism assembly (7). The floating mechanism assembly (7-7) on the pressing mechanism assembly (7) positions the extension rod (10). The extension rod angle servo assembly (7-7-1) on the pressing mechanism assembly (7) rotates the extension rod (10) circumferentially to the installation angle. The pawl on the floating mechanism assembly (7-7) clamps the extension rod (10). S5, the pressing mechanism assembly (7)’s pressing mechanism forward and backward movement servo assembly (7-2), pressing mechanism left and right movement servo assembly (7-3), pressing mechanism angle swing servo assembly (7-4), and pressing mechanism up and down movement servo assembly (7-5) drive the extension rod (10) to move to the installation angle and position. The input shaft clamping jaw (7-8-8) on the floating mechanism assembly (7-7) clamps the input shaft. The floating mechanism assembly (7-7) pre-presses the external spline of the input shaft. The extension rod angle servo assembly (7-7-1) slightly rotates the extension rod. The internal and external splines are recognized by the weight of the floating pressure head. After the recognition signal is triggered, the Kistler press (7-6) starts to press the extension rod (10) to the set position. During the pressing process, the Kistler monitoring instrument collects displacement and force data in real time and performs qualification evaluation. S6, the rivet head fixture on the C-frame rivet assembly (7-8) is pressed against the extension rod (10), and the TOX riveting cylinder (7-8-1) is pressurized to the set riveting pressure to complete the riveting of the two points. During the riveting process, the Kistler monitoring instrument collects displacement and force data in real time and performs a qualification assessment. S7. After the process is completed, the equipment automatically returns to its original position and releases the qualified assembled steering gear workpiece to the next station.

2. The mounting device for a steering gear extension rod according to claim 1, characterized in that: The floating mechanism assembly (7-7) includes an extension rod angle servo assembly, a servo drive pulley assembly, an extension rod contour sleeve fixture, an extension rod clamping jaw, and an extension rod clamping cylinder. The extension rod angle servo assembly (7-7-1) is located on one side of the press head (7-6-1) of the Kistler press (7-6). The bottom of the extension rod angle servo assembly (7-7-1) is connected to the rotating shaft (7-7-5) via the servo drive pulley assembly (7-7-2). The bottom of the rotating shaft (7-7-5) is connected to the extension rod contour sleeve fixture (7-7-4). The extension rod clamping jaw (7-7-6) is located below the extension rod contour sleeve fixture (7-7-4). The rear of the extension rod clamping jaw (7-7-6) is connected to the extension rod clamping cylinder (7-7-7).

3. The mounting device for a steering gear extension rod according to claim 2, characterized in that: The upper part of the rotating shaft (7-7-5) is connected to the rotating disk (7-7-8), and an angle signal detection sensor (7-7-9) is provided above the rotating disk (7-7-8); the top of the rotating shaft (7-7-5) is connected to the pressure head (7-6-1) by a spring.

4. The mounting device for a steering gear extension rod according to claim 1 or 2, characterized in that: The floating mechanism assembly (7-7) is slidably connected to the press connecting seat (7-12) via the slider assembly.

5. The mounting device for a steering gear extension rod according to claim 1, characterized in that: The C-frame riveting assembly (7-8) includes a TOX riveting cylinder, a riveting pressure acquisition sensor, a riveting head, a riveting depth acquisition displacement sensor, a C-frame, and a TOX riveting cylinder moving cylinder. A C-frame (7-8-6) is located at the lower part of the press connecting seat (7-12). The bottom of the C-frame (7-8-6) is connected to the TOX riveting cylinder moving cylinder (7-8-7) via a slider assembly. The TOX riveting cylinder moving cylinder (7-8-7) is fixedly connected to the press connecting seat (7-12). Left riveting heads (7-8-3) are respectively located at the left and right ends inside the C-frame (7-8-6). The right rivet head (7-8-4) is fixedly connected to the C-frame (7-8-6). The tail of the left rivet head (7-8-3) passes through the C-frame (7-8-6) and is connected to the piston rod of the TOX riveting cylinder (7-8-1). A riveting pressure acquisition sensor (7-8-2) is provided on the upper part between the left rivet head (7-8-3) and the piston rod of the TOX riveting cylinder (7-8-1). A rivet point depth acquisition displacement sensor (7-8-5) is provided on the C-frame (7-8-6) above the left rivet head (7-8-3) and the right rivet head (7-8-4).

6. The mounting device for a steering gear extension rod according to claim 5, characterized in that: Below the left riveting head (7-8-3) and the right riveting head (7-8-4) is one end of the input shaft clamping jaw (7-8-8), and the other end of the input shaft clamping jaw (7-8-8) is connected to the jaw clamping cylinder (7-8-9). The jaw clamping cylinder (7-8-9) is fixedly connected to the press connecting seat (7-12).

7. The mounting device for a steering gear extension rod according to claim 1, characterized in that: The loading mechanism assembly (6) includes a loading mechanism base, a left and right translation cylinder, a double-layer front and rear movement cylinder, a sliding lifting cylinder, a slide assembly, a support frame, an extension rod V-shaped positioning block, an extension rod support block, grippers, a clamping cylinder, a rotating cylinder, and the bottom of the loading mechanism base (6-1) is fixedly connected to the working platform (2). The loading mechanism base (6-1) is connected to the bottom surface of the double-layer front and rear movement cylinder and the bottom surface of the third slide assembly (6-3) via the left and right translation cylinder, the first slide assembly (6-2), the lifting cylinder, and the second slide assembly (6-4). On the side, the top of the double-layer front and rear moving cylinder and the third slide assembly (6-3) is connected to the support frame (6-5). One side of the top of the support frame (6-5) is provided with an extension rod V-shaped positioning block (6-10), and the other side of the top of the support frame (6-5) is provided with an extension rod support block (6-9). A gripper (6-8) is provided on one side of the extension rod support block (6-9). The bottom of the gripper (6-8) is connected to a clamping cylinder (6-7). The clamping cylinder (6-7) is connected to a rotating cylinder (6-6), and the rotating cylinder (6-6) is connected to the support frame (6-5).

8. The mounting device for a steering gear extension rod according to claim 7, characterized in that: Photoelectric sensors (6-11) are provided on both sides of the top of the V-shaped positioning block (6-10) on the extension rod.

9. The mounting device for a steering gear extension rod according to claim 1, characterized in that: The left rack and housing clamping and left positioning mechanism (8) has the same structure as the right rack and housing clamping and right positioning mechanism (9); the right rack and housing clamping and right positioning mechanism (9) includes a rack and housing positioning base, a rack and housing positioning front drive cylinder, a rack and housing positioning front drive slide rail, a rack and housing positioning connecting plate, a housing clamping drive servo motor assembly, a rack and housing positioning clamping slide rail, a housing clamping connecting plate, a rack top rod drive servo motor assembly, a grating ruler, a rack positioning fixture, and a housing clamping fixture. The bottom of the rack and housing positioning base (9-1) is fixedly connected to the working platform (2). The rack and housing positioning base (9-1) is provided with a rack and housing positioning front drive slide rail (9-3), and the rack and housing are slidably connected on the rack and housing positioning front drive slide rail (9-3). The rear end of the positioning connecting plate (9-4) is connected to the rack and housing positioning front drive cylinder (9-2), and the front end of the rack and housing positioning connecting plate (9-4) is connected to the first rack push rod drive servo motor assembly (9-5). The front end of the first rack push rod drive servo motor assembly (9-5) is connected to the housing clamping connecting plate (9-6) through the slider assembly. A second rack push rod drive servo motor assembly (9-7) is provided on one side in front of the housing clamping connecting plate (9-6). The second rack push rod drive servo motor assembly (9-7) is connected to one end of the rack positioning fixture (9-9) through the slider assembly. The other end of the rack positioning fixture (9-9) is connected to the housing clamping fixture (9-10). A grating ruler (9-8) is provided on the rear side of the rack positioning fixture (9-9).

10. The mounting device for a steering gear extension rod according to claim 9, characterized in that: One end of the housing clamping fixture (9-10) is connected to the rack positioning fixture (9-9), and the other end of the housing clamping fixture (9-10) passes through the housing clamping connecting plate (9-6) laterally and is located on the outside of the housing clamping connecting plate (9-6).

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