A fully automatic tightening mechanism for the inner tie rod of an automotive steering gear

Abstract

This application provides a fully automatic tightening mechanism for the inner tie rod of an automotive steering gear, including a bottom linear module. A middle rotating feeding module is located on the upper side of the bottom linear module, and an upper clamping and tightening module is also located on the upper side of the bottom linear module. The bottom linear module includes a first base plate, a first slide rail slider, a servo motor, a fixed side of the lead screw support seat, a supporting side of the lead screw support seat, a ball screw, and a moving plate. Two slide rails are formed on the upper surface of the first base plate. This application utilizes the clamping and tightening module, employing a cylinder propulsion structure primarily responsible for propulsion during the tightening process. The clamping mechanism effectively clamps the inner tie rod, and the servo tightening mechanism, driven by a servo tightening machine, achieves tightening of the inner tie rod. This mechanism offers higher automation, better tightening effect, higher efficiency, and greater savings in labor costs.

Description

Technical Field

[0001] This invention relates to the field of fully automated production of automotive steering gears, and more specifically, to a fully automated tightening mechanism for the tie rod inside an automotive steering gear. Background Technology

[0002] An automotive steering gear is a mechanical device used to control the steering of a vehicle. Located on the chassis of the car, it connects the steering wheel and the wheel system. The main function of the automotive steering gear is to transmit the driver's steering signals through the steering wheel to the wheels, enabling the vehicle to travel in the desired direction. The fully automated production process of automotive steering gear requires the use of tie rod tightening equipment.

[0003] Existing tie rod tightening equipment generally consists of two parts: a clamping part and a tightening part. The former can fix the tie rod, while the latter can rotate the tie rod to tighten it. Existing tie rod tightening equipment is slow, requires manual feeding, has a limited range of applicable workpieces, and is inconvenient to operate, which greatly increases the labor intensity of workers. Therefore, we have made improvements and proposed a fully automatic tightening mechanism for automotive steering gear tie rods. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of existing internal tie rod tightening equipment, which generally has two parts: a clamping part and a tightening part. The former can fix the internal tie rod, and the latter can rotate the internal tie rod to tighten it. Existing internal tie rod tightening equipment is slow, requires manual feeding, has a limited range of applicable workpieces, is inconvenient to operate, and greatly increases the labor intensity of workers.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0006] The above-mentioned problem is solved by a fully automatic tightening mechanism for the tie rod inside the automotive steering gear.

[0007] The application is as follows:

[0008] It includes a bottom linear module, a middle rotating feeding module is provided on the upper side of the bottom linear module, and an upper clamping inner pull rod and tightening module are provided on the upper side of the bottom linear module.

[0009] As a preferred technical solution of this application, the bottom linear module includes a first base plate, a first slide rail slider, a servo motor, a fixed side of the lead screw support seat, a supporting side of the lead screw support seat, a ball screw, and a moving plate. The upper surface of the first base plate is provided with two slide rails, and there are two first slide rail sliders. The two first slide rail sliders are used in cooperation, and a slider pad is installed between each slider and the moving plate.

[0010] As a preferred technical solution of this application, the fixed side of the lead screw support is fixedly installed on the upper surface of the first base plate, and the servo motor is fixedly installed on the surface of one side of the fixed side of the lead screw support. The supporting side of the lead screw support is fixedly installed on the upper surface of the first base plate, and the ball screw passes through the fixed side of the lead screw support and is fixedly connected to the output end of the servo motor through a coupling. An optical fiber mounting base is fixedly installed on the side of the first base plate, and a slotted photoelectric switch is fixedly installed on the surface of the optical fiber mounting base as a zero point. An optical fiber sensor is installed on the surface of the moving plate, and the optical fiber sensor is L-shaped. The lower end of the optical fiber sensor passes through the middle of the slotted photoelectric switch.

[0011] As a preferred technical solution of this application, the intermediate rotating feeding module includes a rotating cylinder mechanism, a rotating and limiting mechanism, and the rotating cylinder mechanism is installed on the upper surface of one corner of the moving plate. The rotating cylinder mechanism includes a rotating cylinder base, a rotating cylinder support, a rotating cylinder top seat, and a rotating cylinder. The rotating cylinder base is fixedly installed on the upper surface of the moving plate. The rotating cylinder support is vertically installed on the rotating cylinder base, and the rotating cylinder top seat is vertically installed on the rotating cylinder support. The surfaces of the rotating cylinder base and the rotating cylinder top seat are provided with openings, and copper sleeves are embedded in the openings. The two rods of the rotating cylinder are inserted into the holes of the copper sleeves and used as axes. The rod ends of the rotating cylinder are fixedly installed with spherical bearings, and cylinder push rod shafts are fixedly installed on the surfaces of the spherical bearings. The cylinder push rod shafts are threadedly connected to the rotating top plate.

[0012] As a preferred technical solution of this application, the rotation and limiting mechanism is installed in the middle position of the moving plate, and a rotating bushing is fixedly installed on the upper surface of the moving plate. The middle part of the rotating bushing is stepped and two first tapered roller bearings are installed thereon. The rotating shaft is connected inside the first tapered roller bearing, and one side of the rotating shaft is engaged with the inner ring of the first tapered roller bearing. The other side of the rotating shaft is fixed with a first locking nut. A rotating top plate is connected to the upper side of the rotating shaft, and a limiting connecting post is installed on the surface of the rotating top plate. Two sets of limiting brackets are installed on the upper surface of the moving plate.

[0013] As a preferred technical solution of this application, the clamping inner pull rod and tightening module includes a cylinder propulsion structure, a clamping inner pull rod mechanism, and a servo tightening mechanism. The cylinder propulsion structure consists of a first cylinder, a second base plate, a second slide rail slider, and a limiting component. The first cylinder is fixedly installed on the surface of the second base plate, and the second slide rail sliders are all matched and installed on the second base plate. The limiting component is located on one side of the second slide rail slider. The left and right sides of the clamping inner pull rod mechanism are connected to the second cylinders, and a cylinder support seat is fixedly installed on the lower surface of the second cylinder. A floating joint is fixedly installed at one end of the second cylinder. The floating joint is connected to a push rod connecting plate on one side. Three guide shafts are mounted on the surface of the push rod connecting plate, and linear bearings are mounted on the surface of the guide shafts. A pull rod clamping push plate is connected to the surface of the linear bearings. Six thrust bearings are mounted on the surface of the pull rod clamping push plate, and push shafts are provided on the outside of each of the six thrust bearings. An oblique push shaft is connected to the surface of the push shaft, and the oblique push shaft is concentrically connected to the push shaft. A clamping plate is connected to the surface of the oblique push shaft, and a tightening shaft is provided on one side of the clamping plate. A gripper rotating shaft is provided on one side of the tightening shaft. The clamping plate and the tightening shaft are connected by a gripper rotating shaft.

[0014] As a preferred technical solution of this application, the servo tightening mechanism includes a servo tightening machine and a servo tightening machine bracket. The servo tightening machine is fixedly installed on the servo tightening machine bracket. A tightening machine connector is connected to the front surface of the servo tightening machine. A push rod connecting plate is provided on one side of the tightening machine connector. The tightening machine connector passes through the push rod connecting plate and is fixedly connected to the tightening shaft. A bearing seat is provided on one side of the tightening machine connector. A sliding plate is provided on the lower side of the bearing seat. The bearing seat is fixedly installed on the surface of the sliding plate. Two second tapered roller bearings are provided inside the bearing seat. One end of the tightening shaft is stepped, and the other end is engaged with the inner ring of the second tapered roller bearing by a second locking nut.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] In the scheme of this application:

[0017] 1. By using the clamping inner pull rod and tightening module, and by setting up a cylinder propulsion structure, the cylinder propulsion structure is mainly responsible for the propulsion of the entire clamping inner pull rod and tightening module during the tightening process. The clamping inner pull rod mechanism can clamp the inner pull rod. The servo tightening mechanism drives the tightening shaft through the servo tightening machine to tighten the inner pull rod. This mechanism has a higher degree of automation, higher tightening effect, higher efficiency, and saves more labor costs.

[0018] 2. By setting up a bottom linear module and a middle rotating feeding module, the moving plate can be driven to move, and the rotating top plate can be driven to rotate through a rotating cylinder, thereby realizing automatic feeding of the inner tie rod and improving its practicality. Attached Figure Description

[0019] Figure 1 A three-dimensional structural diagram of the fully automatic tightening mechanism for the internal tie rod of the automotive steering gear provided in this application;

[0020] Figure 2 A schematic diagram of the bottom linear module of the fully automatic tightening mechanism for the internal tie rod of the automotive steering gear provided in this application;

[0021] Figure 3 A cross-sectional structural diagram of the intermediate rotary feeding module of the fully automatic tightening mechanism for the internal tie rod of the automotive steering gear provided in this application;

[0022] Figure 4 This is a structural schematic diagram of the cross-section of the fully automatic tightening mechanism for the inner tie rod of the automotive steering gear provided in this application, which clamps the inner tie rod and tightens the module.

[0023] The image shows:

[0024] 1. Bottom linear module; 2. Middle rotary feeding module; 3. Clamping inner pull rod and tightening module; 4. First base plate; 5. First slide rail slider; 6. Servo motor; 7. Screw support seat fixed side; 8. Ball screw; 9. Coupling; 10. Screw support seat support side; 11. Moving plate; 12. Photoelectric switch sensor; 13. Fiber optic mounting base; 14. Slotted photoelectric switch; 15. Rotary cylinder base; 16. Rotary cylinder support; 17. Rotary cylinder top seat; 18. Rotary cylinder; 19. Spherical bearing; 20. Cylinder push rod shaft; 21. Rotary top plate; 22. Rotary shaft; 23. Rotary bushing; 24. First tapered roller bearing; 25. ... 1. Locking nut; 26. Limiting connecting post; 27. Limiting bracket; 28. First cylinder; 29. ​​Second base plate; 30. Second slide rail slider; 31. Limiting assembly; 32. Second cylinder; 33. Cylinder support seat; 34. Floating joint; 35. Push rod connecting plate; 36. Guide shaft; 37. Linear bearing; 38. Pull rod clamping push plate; 39. Thrust bearing; 40. Push shaft; 41. Angled push shaft; 42. Clamping plate; 43. Handle rotating shaft; 44. Tightening shaft; 45. Servo tightening machine; 46. Servo tightening machine bracket; 47. Tightening machine joint; 48. Bearing seat; 49. Sliding plate; 50. Second tapered roller bearing; 51. Second locking nut. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described examples are only some embodiments of the present invention, and not all embodiments.

[0026] Therefore, the following detailed description of embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely illustrates some embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] like Figure 1 - Figure 4 As shown, this embodiment proposes a fully automatic tightening mechanism for the inner tie rod of an automobile steering gear, including a bottom linear module 1, an intermediate rotating feeding module 2 on the upper side of the bottom linear module 1, and an upper clamping inner tie rod and tightening module 3 on the upper side of the bottom linear module 1.

[0031] As a preferred embodiment, based on the above method, the bottom linear module 1 further includes a first base plate 4, a first slide rail slider 5, a servo motor 6, a screw support fixed side 7, a screw support support supporting side 10, a ball screw 8, and a movable plate 11. The upper surface of the first base plate 4 is provided with two slide rails, and there are two first slide rail sliders 5. The movable plate 11 can be supported by the two first slide rail sliders 5. The two first slide rail sliders 5 are used in cooperation, and a slider pad is installed between each slider and the movable plate 11 to facilitate the protection of the first slide rail slider 5 by the slider pad.

[0032] In a preferred embodiment, based on the above method, the screw support fixed side 7 is further fixedly installed on the upper surface of the first base plate 4, and the servo motor 6 is fixedly installed on one side of the screw support fixed side 7. The screw support support side 10 is fixedly installed on the upper surface of the first base plate 4, and the ball screw 8 passes through the screw support fixed side 7 and is fixedly connected to the output end of the servo motor 6 through the coupling 9, so that the servo motor 6 can drive the ball screw 8 to rotate and drive the moving plate 11 on the surface to move. The side of the first base plate 4 is fixedly installed with an optical fiber mounting base 13, and the surface of the optical fiber mounting base 13 is fixedly installed with a slotted photoelectric switch 14 as a zero point. The surface of the moving plate 11 is installed with a photoelectric switch sensing piece 12, and the photoelectric switch sensing piece 12 is L-shaped. The lower end of the photoelectric switch sensing piece 12 passes through the middle of the slotted photoelectric switch 14, so that the photoelectric switch sensing piece 12 can sense the slotted photoelectric switch 14 to achieve the limit of the moving plate 11.

[0033] In a preferred embodiment, based on the above method, the intermediate rotary loading module 2 further includes a rotary cylinder mechanism, a rotation and limiting mechanism, and the rotary cylinder mechanism is installed on the upper surface of one corner of the movable plate 11. The rotary cylinder mechanism includes a rotary cylinder base 15, a rotary cylinder support 16, a rotary cylinder top seat 17, and a rotary cylinder 18. The rotary cylinder base 15 is fixedly installed on the upper surface of the movable plate 11 and can move the rotary cylinder 18 by moving the movable plate 11. The rotary cylinder support 16 is vertically installed on the rotary cylinder base 15, and the rotary cylinder top seat 17 is vertically installed on the rotary cylinder base 15. On the rotary cylinder support 16, the surfaces of the rotary cylinder base 15 and the rotary cylinder top seat 17 are provided with openings, and copper sleeves are embedded in the openings. The two rods of the rotary cylinder 18 are inserted into the holes of the copper sleeves and used as axes. The rotary cylinder 18 can be installed on the rotary cylinder top seat 17 and the rotary cylinder support 16 by inserting the two rods of the rotary cylinder 18 into the copper sleeves. The rod ends of the rotary cylinder 18 are fixedly installed with spherical bearings 19, and the surface of the spherical bearings 19 is fixedly installed with cylinder push rod shafts 20. The cylinder push rod shafts 20 are threadedly connected to the rotary top plate 21, which facilitates the rotation of the rotary top plate 21 by the rotary cylinder 18.

[0034] In a preferred embodiment, based on the above method, the rotation and limiting mechanism is further installed in the middle position of the movable plate 11, and a rotating bushing 23 is fixedly installed on the upper surface of the movable plate 11. The middle part of the rotating bushing 23 is stepped and two first tapered roller bearings 24 are installed. The rotating shaft 22 is connected inside the first tapered roller bearing 24, and one side of the rotating shaft 22 is engaged with the inner ring of the first tapered roller bearing 24. The other side of the rotating shaft 22 is fixed with a first locking nut 25. The rotating shaft 22 can be fixed by the first locking nut 25. A rotating top plate 21 is connected to the upper side of the rotating shaft 22, and a limiting connecting post 26 is installed on the surface of the rotating top plate 21. Two sets of limiting brackets 27 are installed on the upper surface of the movable plate 11 to facilitate limiting by the limiting connecting post 26 in conjunction with the limiting bracket 27, and to achieve the purpose of limiting the limiting connecting post 26 by the limiting bracket 27.

[0035] As a preferred embodiment, based on the above method, the clamping inner pull rod and tightening module 3 further includes a cylinder propulsion structure, a clamping inner pull rod mechanism, and a servo tightening mechanism. The cylinder propulsion structure consists of a first cylinder 28, a second base plate 29, a second slide rail slider 30, and a limiting component 31. The first cylinder 28 is fixedly installed on the surface of the second base plate 29, and the second slide rail sliders 30 are all matched and installed on the second base plate 29. The limiting component 31 is located on one side of the second slide rail slider 30 and is mainly responsible for the propulsion of the entire clamping inner pull rod and tightening module during the tightening process. The left and right sides of the clamping inner pull rod mechanism are connected to the second cylinders 32, and the lower surface of the second cylinders 32 is fixedly installed with a cylinder support seat 33. One end of the second cylinder 32 is fixedly installed with a floating joint 34, and one side of the floating joint 34 is connected with a push rod connecting plate 35. The floating joint 34 can transmit the thrust to the push rod connecting plate 35. The surface of the push rod connecting plate 35 is fixedly installed with a cylinder support seat 33. The device is equipped with three guide shafts 36, and linear bearings 37 are mounted on the surface of the guide shafts 36. A pull rod clamping push plate 38 is connected to the surface of the linear bearings 37, facilitating the transmission of force to the pull rod clamping push plate 38 under the support of the guide shafts 36 and linear bearings 37. Six thrust bearings 39 are mounted on the surface of the pull rod clamping push plate 38, and each of the six thrust bearings 39 is externally fitted with a push shaft 40. The six thrust bearings 39 push within the grooves of the push shafts 40. The surface of the push shafts 40 is connected to… A slanted push shaft 41 is provided, and the slanted push shaft 41 is concentrically connected to the push shaft 40. A clamping plate 42 is connected to the surface of the slanted push shaft 41, and a tightening shaft 44 is provided on one side of the clamping plate 42. A gripper shaft 43 is provided on one side of the tightening shaft 44. The clamping plate 42 and the tightening shaft 44 are connected by the gripper shaft 43. The slanted push shaft 41 and the push shaft 40 are concentrically connected. When moving forward, the clamping plate 42 is clamped. The clamping plate 42 and the tightening shaft 44 are connected by the gripper shaft 43, thereby clamping the inner pull rod.

[0036] In a preferred embodiment, based on the above method, the servo tightening mechanism further includes a servo tightening machine 45 and a servo tightening machine bracket 46. The servo tightening machine 45 is fixedly mounted on the servo tightening machine bracket 46. A tightening machine connector 47 is connected to the front surface of the servo tightening machine 45, and a push rod connecting plate 35 is provided on one side of the tightening machine connector 47. The tightening machine connector 47 passes through the push rod connecting plate 35 and is fixedly connected to the tightening shaft 44. The servo tightening machine 45 is fixedly connected to the tightening shaft 44 through the tightening machine connector 47 and through the push rod connecting plate 35. A bearing housing 48 is provided on one side of the machine connector 47, and a sliding plate 49 is provided on the lower side of the bearing housing 48. The bearing housing 48 is fixedly installed on the surface of the sliding plate 49, and two second tapered roller bearings 50 are provided inside the bearing housing 48. One end of the tightening shaft 44 is stepped, and the other end is engaged with the inner ring of the second tapered roller bearing 50 by a second locking nut 51. The bearing housing 48 is installed on the sliding plate 49 and has two tapered roller bearings 50 inside. One end is stepped, and the other end is engaged with the inner ring of the bearing by locking nuts 51, thereby realizing the tightening of the inner tie rod.

[0037] Specifically, the working principle of this solution is as follows: When in use, the servo motor 6 is started to drive the ball screw 8 to rotate, which in turn drives the moving plate 11 on the surface to move. The photoelectric switch sensor 12 senses the slotted photoelectric switch 14 to achieve the limit of the moving plate 11. Then, the rotary cylinder 18 is started to drive the rotating top plate 21 to rotate. The limiting connecting column 26 on the lower surface cooperates with the limiting bracket 27 to achieve the purpose of limiting the rotating top plate 21. The clamping inner pull rod and tightening module 3 includes a cylinder propulsion structure, a clamping inner pull rod mechanism, and a servo tightening mechanism. The cylinder propulsion structure consists of cylinder 28, base plate 29, slide rail slider 30, and limit assembly 31. It is mainly responsible for the propulsion of the entire clamping inner pull rod and tightening module during the tightening process. The clamping inner pull rod mechanism consists of a pair of left and right cylinders 32 mounted on cylinder support seats 33. The floating joint 34 transmits the thrust to the push rod connecting plate 35. Three guide shafts 36 mounted on the push rod connecting plate 35 transmit the force to the pull rod clamping push plate 38 under the support of linear bearings 37. The pull rod clamping push plate 38 is equipped with six thrust bearings 39, which push back and forth in the groove of the push shaft 40. The inclined push shaft 41 is concentrically connected to the push shaft 40. The forward movement clamps the clamp. The clamping plate 42 is connected to the tightening shaft 44 via a gripper shaft 43, thereby clamping the inner pull rod. In the servo tightening mechanism, the servo tightening machine 45 is mounted on the servo tightening machine bracket 46, and the front is connected to the tightening machine connector 47, which passes through the push rod connecting plate 35 and is connected to the tightening shaft 44. The bearing seat 48 is mounted on the sliding plate 49 and contains two tapered roller bearings 50. One end is stepped, and the other end is secured to the inner ring of the bearing with a locking nut 51, thereby tightening the inner pull rod. The above is the working process of the entire device. All contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0038] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described herein. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present invention, as well as all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present invention.

Claims

1. A fully automatic tightening mechanism for the inner tie rod of an automotive steering gear, comprising a bottom linear module (1), characterized in that: The bottom straight module (1) is provided with a middle rotating feeding module (2) on its upper side, and the bottom straight module (1) is provided with an upper clamping inner pull rod and a tightening module (3) on its upper side. The bottom linear module (1) includes a first base plate (4), a first slide rail slider (5), a servo motor (6), a screw support fixed side (7), a screw support support supporting side (10), a ball screw (8), and a moving plate (11). The upper surface of the first base plate (4) is provided with two slide rails, and there are two first slide rail sliders (5). The two first slide rail sliders (5) are used together, and a slider pad is installed between each slider and the moving plate (11). The intermediate rotary loading module (2) includes a rotary cylinder mechanism, a rotation and limiting mechanism, and the rotary cylinder mechanism is installed on the upper surface of one corner of the movable plate (11). The rotary cylinder mechanism includes a rotary cylinder base (15), a rotary cylinder support (16), a rotary cylinder top seat (17), and a rotary cylinder (18). The rotary cylinder base (15) is fixedly installed on the upper surface of the movable plate (11), and the rotary cylinder support (16) is vertically installed on the rotary cylinder base (15). The seat (17) is vertically mounted on the rotary cylinder support (16). The surfaces of the rotary cylinder base (15) and the rotary cylinder top seat (17) are provided with openings, and copper sleeves are embedded in the openings. The two rods of the rotary cylinder (18) are inserted into the holes of the copper sleeves and used as the axis. The rod end of the rotary cylinder (18) is fixedly mounted with a spherical bearing (19), and the surface of the spherical bearing (19) is fixedly mounted with a cylinder push rod shaft (20). The cylinder push rod shaft (20) is threadedly connected to the rotary top plate (21). The clamping inner pull rod and tightening module (3) includes a cylinder propulsion structure, a clamping inner pull rod mechanism, and a servo tightening mechanism. The cylinder propulsion structure consists of a first cylinder (28), a second base plate (29), a second slide rail slider (30), and a limiting component (31). The first cylinder (28) is fixedly installed on the surface of the second base plate (29), and the second slide rail sliders (30) are all matched and installed on the second base plate (29). The limiting component (31) is located on one side of the second slide rail slider (30). The left and right sides of the clamping inner pull rod mechanism are connected to the second cylinder (32), and the lower surface of the second cylinder (32) is fixedly installed with a cylinder support seat (33). One end of the second cylinder (32) is fixedly installed with a floating joint (34), and one side of the floating joint (34) is connected with a push rod connecting plate (35). The surface of the push rod connecting plate (35) is equipped with three guide shafts (36), and the surface of the guide shafts (36) is equipped with linear bearings (37), and the surface of the linear bearings (37) is connected to a pull rod clamping push plate (38). The surface of the pull rod clamping push plate (38) is equipped with six thrust bearings (39), and the exterior of each of the six thrust bearings (39) is provided with a push shaft (40). The surface of the push shaft (40) is connected to a slanted push shaft (41), and the slanted push shaft (41) is concentrically connected to the push shaft (40). The surface of the slanted push shaft (41) is connected to a clamping plate (42), and a tightening shaft (44) is provided on one side of the clamping plate (42), and a gripper rotating shaft (43) is provided on one side of the tightening shaft (44). The clamping plate (42) and the tightening shaft (44) are connected by the gripper rotating shaft (43). The servo tightening mechanism includes a servo tightening machine (45) and a servo tightening machine bracket (46). The servo tightening machine (45) is fixedly installed on the servo tightening machine bracket (46). A tightening machine connector (47) is connected to the front end of the servo tightening machine (45). A push rod connecting plate (35) is provided on one side of the tightening machine connector (47). The tightening machine connector (47) passes through the push rod connecting plate (35) and is fixedly connected to the tightening shaft (44). A bearing seat (48) is provided on one side of the tightening machine connector (47). A sliding plate (49) is provided on the lower side of the bearing seat (48). The bearing seat (48) is fixedly installed on the surface of the sliding plate (49). Two second tapered roller bearings (50) are provided inside the bearing seat (48). One end of the tightening shaft (44) is stepped, and the other end is engaged with the inner ring of the second tapered roller bearing (50) by a second locking nut (51).

2. The fully automatic tightening mechanism for the inner tie rod of an automotive steering gear according to claim 1, characterized in that: The screw support base fixed side (7) is fixedly installed on the upper surface of the first base plate (4), and the servo motor (6) is fixedly installed on the surface of one side of the screw support base fixed side (7). The screw support base support side (10) is fixedly installed on the upper surface of the first base plate (4), and the ball screw (8) passes through the screw support base fixed side (7) and is fixedly connected to the output end of the servo motor (6) through the coupling (9). The side of the first base plate (4) is fixedly installed with an optical fiber mounting base (13), and the surface of the optical fiber mounting base (13) is fixedly installed with a slotted photoelectric switch (14) as a zero point. The surface of the moving plate (11) is installed with a photoelectric switch sensing piece (12), and the photoelectric switch sensing piece (12) is L-shaped. The lower end of the photoelectric switch sensing piece (12) passes through the middle of the slotted photoelectric switch (14).

3. The fully automatic tightening mechanism for the inner tie rod of an automotive steering gear according to claim 1, characterized in that: The rotation and limiting mechanism is installed in the middle of the moving plate (11), and a rotating bushing (23) is fixedly installed on the upper surface of the moving plate (11). The middle part of the rotating bushing (23) is stepped, and two first tapered roller bearings (24) are installed. The rotating shaft (22) is connected inside the first tapered roller bearing (24), and one side of the rotating shaft (22) is engaged with the inner ring of the first tapered roller bearing (24). The other side of the rotating shaft (22) is fixed with a first locking nut (25). A rotating top plate (21) is connected to the upper side of the rotating shaft (22), and a limiting connecting column (26) is installed on the surface of the rotating top plate (21). Two sets of limiting brackets (27) are installed on the upper surface of the moving plate (11).

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