Descaling and polishing device for tooth part of steering gear rack

Abstract

The utility model relates to a polishing device, in particular to a descaling polishing device for a tooth part of a steering gear rack. The polishing device comprises a machine table, a lifting mechanism is arranged on the machine table, and a polishing wheel is installed on the lifting mechanism through a polishing motor; a rotating seat is arranged on the machine table, and a clamping translation mechanism is arranged on the rotating seat. According to the polishing device, the rack can be rotated through the rotating base, so that the inclination direction of the tooth shape of the rack is consistent with the rotating direction of the polishing wheel, abrasion to the tooth shape can be effectively reduced in the polishing process, it is guaranteed that oxide skin at the bottom of a tooth groove can be fully removed, and on the premise that the polishing effect is guaranteed, rapid polishing can be achieved, and the influence on the tooth portion of the rack is reduced. And splashing of dust and particles generated in the polishing process can be effectively reduced through spraying, so that the working environment can be effectively improved, inhalation of the dust and the particles is reduced, and the body health of operators is protected. The problems that an existing polishing machine is prone to causing extra abrasion and influences rack performance are solved.

Description

Technical Field

[0001] The utility model relates to a polishing device, in particular to a scale removing and polishing device for the tooth part of a steering gear rack. Background Art

[0002] The steering gear rack is an important component affecting the performance of the steering gear assembly on the vehicle. The steering gear rack is installed inside the steering gear housing, and the tooth part of the steering gear rack contacts with the tooth part of the gear shaft for transmission. Since the tooth part of the steering gear rack contacts with the tooth part of the gear shaft for transmission, it is necessary to ensure that there is no foreign matter on the surface of the rack tooth part. Otherwise, abnormal noise and vibration will be generated due to foreign matter, affecting the operation of the steering gear. However, during the processing of the rack, scale will be generated on the tooth part due to high-frequency quenching. During the processing, it is necessary to remove the scale on the tooth part completely, so as to improve the subsequent assembly qualification rate and eliminate abnormal noise and vibration during the operation of the steering gear. At present, the process of brushing the scale of the steering gear rack is to hold the rack by hand to brush the scale, which not only has a large labor intensity but also low efficiency.

[0003] The patent application with the publication number of CN219359106U discloses an automatic polishing machine for the piston of an automotive steering gear rack, which includes a machine table, a workpiece feeding mechanism on the machine table, and a grinding wheel arranged beside the machine table. The workpiece feeding mechanism includes a cross screw slide table installed on the machine table, a clamping seat installed on the cross screw slide table, and a control module for controlling the cross screw slide table. The clamping seat includes a fixed mounting seat one and a mounting seat two. A telescopic center point is fixedly installed on the mounting seat one, and a center point driven by a motor to rotate is installed on the mounting seat two. Thus, it can automatically avoid the piston head on the rack piston when polishing the rack piston, meeting the processing requirements after the improvement of the polishing process. By the way of overall polishing of the rack piston, the dimensional accuracy and surface quality of the processed rack piston are improved.

[0004] The above polishing machine can polish the rack, but it cannot polish along the tooth profile of the rack tooth part during the polishing process. Since the tooth profile of the rack tooth part is inclined, when it is not possible to polish along the tooth profile, it is easy to cause additional wear to the tooth part, resulting in a slight change in the tooth profile of the tooth part, and further affecting the performance of the rack. Therefore, it is necessary to design a scale removing and polishing device for the tooth part of a steering gear rack to solve the above problems. Summary of the Invention

[0005] The purpose of the utility model is to provide a scale removing and polishing device for the tooth part of a steering gear rack, which can reduce wear and minimize the impact on the performance of the rack.

[0006] The technical solution of the utility model is as follows:

[0007] A descaling and polishing device for the rack teeth of a steering gear, which is composed of a machine table, a lifting mechanism, a polishing motor, a polishing wheel, a rotating seat and a clamping and translation mechanism. It is characterized in that: a lifting mechanism is arranged on the machine table, a polishing wheel is installed on the lifting mechanism through the polishing motor, a rotating seat is movably installed on the machine table below the polishing wheel through an assembly short shaft, and a clamping and translation mechanism for clamping and moving the rack is arranged on the rotating seat.

[0008] The lifting mechanism is composed of a gantry support frame, a lifting slide seat, a lifting motor and a lifting lead screw. The lifting slide seat is movably installed on the gantry support frame through parallel slide rails. A lifting motor is arranged on the gantry support frame above the lifting slide seat. The output shaft of the lifting motor is connected with a lifting lead screw, and the lifting lead screw is connected with the lifting slide seat through a lead screw nut.

[0009] A plurality of waist-shaped holes are arranged on the rotating seat, and a plurality of positioning holes are arranged on the machine table below the waist-shaped holes.

[0010] A liquid collecting tank is arranged below the positioning hole, and a discharge port is arranged at the bottom of the liquid collecting tank; a plurality of confluence ports are arranged on the machine table at the rear end of the liquid collecting tank, and a precipitation and filtration tank is arranged below the confluence port and the discharge port; a spray head capable of spraying to the bottom end of the polishing wheel is arranged on the lifting slide seat, and the spray head is communicated with the precipitation and filtration tank through a pump.

[0011] The clamping and translation mechanism is composed of a positioning seat, a clamping cylinder, a chuck, a translation motor and a translation lead screw. A clamping cylinder is arranged above the positioning seat, and a chuck is arranged at the end of the piston rod of the clamping cylinder; a translation motor is arranged below the positioning seat, the output shaft of the translation motor is connected with a translation lead screw, and the translation lead screw is connected with the positioning seat through a lead screw nut; the positioning seat is movably connected with the rotating seat through a slide rail.

[0012] A positioning groove is arranged on the positioning seat below the chuck.

[0013] The beneficial effects of the present utility model are as follows:

[0014] The descaling and polishing device for the rack teeth of the steering gear can rotate the rack through the rotating seat, so that the inclination direction of the tooth profile of the rack is consistent with the rotation direction of the polishing wheel, which can effectively reduce the wear of the tooth profile during the polishing process, and ensure that the scale at the bottom of the tooth groove can be fully removed. On the premise of ensuring the polishing effect, it can quickly polish and reduce the influence on the rack teeth. Through spraying, the dust and particle splash generated during the polishing process can be effectively reduced, thereby effectively improving the working environment, reducing the inhalation of dust and particles, and protecting the health of operators. It solves the problem that the existing polishing machine is prone to cause additional wear and affect the performance of the rack. Brief Description of the Drawings

[0015] Figure 1 It is an isometric schematic diagram of the present utility model;

[0016] Figure 2 is the right view schematic diagram of the present utility model;

[0017] Figure 3 is the structural schematic diagram of the lifting mechanism of the present utility model;

[0018] Figure 4 is the top view schematic diagram of the machine table of the present utility model;

[0019] Figure 5 is Figure 4 the structural schematic diagram in the A-A direction in

[0020] Figure 6 is the axonometric schematic diagram of the clamping and translation mechanism of the present utility model;

[0021] Figure 7 is the right view schematic diagram of the clamping and translation mechanism of the present utility model.

[0022] In the figure: 1. Machine table, 2. Polishing motor, 3. Polishing wheel, 4. Rotating seat, 5. Gantry support frame, 6. Lifting slide seat, 7. Lifting motor, 8. Lifting lead screw, 9. Kidney-shaped hole, 10. Positioning hole, 11. Liquid collecting tank, 12. Drain outlet, 13. Confluence port, 14. Precipitation and filtration tank, 15. Sprinkler head, 16. Positioning seat, 17. Clamping cylinder, 18. Chuck, 19. Translation motor, 20. Translation lead screw, 21. Positioning groove, 22. Rack (workpiece), 23. Cofferdam. Specific embodiments

[0023] The device for removing oxide scale and polishing the tooth part of the steering gear rack is composed of a machine table 1, a lifting mechanism, a polishing motor 2, a polishing wheel 3, a rotating seat 4 and a clamping and translation mechanism. A lifting mechanism is arranged on the machine table 1, a polishing motor 2 is arranged on the lifting mechanism, a polishing wheel 3 is installed on the output shaft of the polishing motor 2, and steel wire brush hairs are arranged on the polishing wheel 3, so as to polish the tooth part of the rack by the polishing wheel 3 rotating driven by the polishing motor 2 to remove the oxide scale on the rack. The function of the lifting mechanism is to drive the polishing motor 2 and the polishing wheel 3 to lift. Furthermore, after the polishing wheel 3 rises, it is convenient to clamp the rack, and after the polishing wheel 3 descends and contacts the rack, it is convenient to polish the rack. The rotating seat 4 is movably installed on the machine table 1 below the polishing wheel 3 through an assembly short shaft, and a clamping and translation mechanism for clamping and moving the rack is arranged on the rotating seat 4. The rotating seat 4 can rotate relative to the machine table 1, so as to drive the clamping and translation mechanism and the rack clamped and fixed on the clamping and translation mechanism to rotate, so that the direction of the tooth profile of the rack is consistent with the direction of the polishing wheel 3, thereby effectively reducing the wear of the tooth profile during the polishing process, and ensuring that the oxide scale at the bottom of the tooth groove can be fully removed. On the premise of ensuring the polishing effect, it can polish quickly and reduce the influence on the tooth part of the rack.

[0024] The lifting mechanism is composed of a gantry support frame 5, a lifting slide 6, a lifting motor 7, and a lifting lead screw 8. The gantry support frame 5 is movably installed with a lifting slide 6 through parallelly arranged slide rails. Above the lifting slide 6 on the gantry support frame 5, there is a lifting motor 7. The output shaft of the lifting motor 7 is connected with a lifting lead screw 8. The lifting lead screw 8 is connected with the lifting slide 6 through a lead screw nut. The gantry support frame 5 is fixedly connected with the machine table through fixing bolts. The polishing motor 2 is fixedly connected with the lifting slide 6. The function of the lifting motor 7 is to drive the lifting lead screw 8 to rotate through the lifting motor 7, so that during the rotation of the lifting lead screw 8, the lifting slide 6 is driven to lift through the lead screw nut, thereby driving the polishing motor 2 and the polishing wheel 3 to lift.

[0025] Multiple kidney-shaped holes 9 are arranged on the rotating seat 4, and multiple positioning holes 10 are arranged on the machine table 1 below the kidney-shaped holes 9. The function of the kidney-shaped holes 9 is to enable the fixing bolts to pass through the rotating seat 4 and the tabletop of the machine table 1 in sequence through the cooperation of the kidney-shaped holes 9 and the positioning holes 10, so as to relatively fix the rotating seat 4 and the machine table 1, thereby facilitating the fixing of the rack after the angle of the rack is adjusted according to the rack model.

[0026] A liquid collecting tank 11 is arranged below the positioning hole 10, and a discharge port 12 is arranged at the bottom of the liquid collecting tank 11. Multiple confluence ports 13 are arranged on the machine table 1 at the rear end of the liquid collecting tank 11. A precipitation and filtration tank 14 is arranged below the confluence ports 13 and the discharge port 12. A spray head 15 capable of spraying towards the bottom end of the polishing wheel 3 is arranged on the lifting slide 6. The spray head 15 is communicated with the precipitation and filtration tank 14 through a pump. By spraying towards the bottom end of the polishing wheel 3, the spray head 15 can prevent dust and particles generated during the polishing process from splashing through the liquid, reduce dust and particulate matter in the surrounding environment, and effectively protect the environment. The function of the liquid collecting tank 11 is to collect the liquid leaking from the positioning hole 10 through the liquid collecting tank 11, and then facilitate the discharge into the precipitation and filtration tank 14 through the discharge port 12. The function of the confluence ports 13 is to collect the liquid on the tabletop of the machine table 1 through the confluence ports 13 and then discharge it into the precipitation and filtration tank 14. The precipitation and filtration tank 14 can precipitate and filter the liquid, so that the liquid can be reused, reducing resource consumption. A retaining wall 23 is arranged around the tabletop of the machine table 1 to block the liquid through the retaining wall 23 and make the liquid converge towards the confluence ports 13.

[0027] The clamping and translation mechanism is composed of a positioning seat 16, a clamping cylinder 17, a chuck 18, a translation motor 19 and a translation lead screw 20. A clamping cylinder 17 is arranged above the positioning seat 16, and a chuck 18 is arranged at the end of the piston rod of the clamping cylinder 17; a translation motor 19 is arranged below the positioning seat 16, a translation lead screw 20 is connected to the output shaft of the translation motor 19, and the translation lead screw 20 is connected to the positioning seat 16 through a lead screw nut; the positioning seat 16 is movably connected to the rotating seat 4 through a slide rail. A positioning groove 21 is arranged on the positioning seat 16 below the chuck 18. The function of the clamping cylinder 17 is to drive the chuck 18 to move up and down, so as to clamp and fix the rack in the positioning groove 21 through the chuck 18. The translation motor 19 can drive the translation lead screw 20 to rotate, and then drive the positioning seat 16 to translate through the lead screw nut, thereby driving the rack to translate, so that the rotating polishing wheel 3 can comprehensively polish and clean the tooth part of the rack.

[0028] When the rust and scale polishing device for the tooth part of the steering gear rack works, the tooth part of the rack is inserted into the positioning groove 21 of the positioning seat 16 inward, so that the tooth part of the rack faces upward. After the rack is in place, start the clamping cylinder 17, and the clamping cylinder 17 fixes the rack on the positioning seat 16 through the chuck 18. After the rack is fixed, rotate the rotating seat 4 according to the rack model to adjust the rack angle so that the tooth profile angle of the rack is consistent with that of the polishing wheel 3 (when continuously polishing racks of the same model, only need to initially adjust and rotate the rotating seat 4). After the adjustment is completed, fix the rotating seat 4 through the fixing bolts in cooperation with the waist-shaped holes 9 and the positioning blocks 10. After the rotating seat 4 is fixed, start the pump connected to the nozzle 15 and spray to the bottom end of the polishing wheel 3. After the nozzle 15 starts to discharge liquid, start the lifting motor 7, and the lifting motor 7 drives the polishing wheel 3 to move downward through the lifting lead screw 8, the lead screw nut, the lifting slide seat 6 and the polishing motor 2 in sequence, so that the polishing wheel 3 contacts the rack. During the downward movement of the polishing wheel 3, start the polishing motor 2 to make the polishing wheel 3 rotate. After the polishing wheel 3 moves downward in place, the rotating polishing wheel 3 polishes the rack. During the polishing process, start the translation motor 19, and the translation motor 19 drives the rack to translate through the translation lead screw 20, the lead screw nut and the positioning seat 16 in sequence, and gradually polishes the tooth part of the rack and removes the rust and scale.

[0029] The rust and scale polishing device for the tooth part of the steering gear rack can rotate the rack through the rotating seat 4 so that the inclination direction of the tooth profile of the rack is consistent with the rotation direction of the polishing wheel 3, which can effectively reduce the wear of the tooth profile during the polishing process, and ensure that the rust and scale at the bottom of the tooth groove can be fully removed. On the premise of ensuring the polishing effect, it can quickly polish and reduce the impact on the tooth part of the rack. Through spraying, the dust and particle splashing generated during the polishing process can be effectively reduced, thereby effectively improving the working environment, reducing the inhalation of dust and particulate matter, and thus protecting the health of the operators. It solves the problem that the existing polishing machine is prone to cause additional wear and affect the performance of the rack.

Claims

1. A descaling and polishing device for the rack teeth of a steering gear, which is composed of a machine table (1), a lifting mechanism, a polishing motor (2), a polishing wheel (3), a rotating seat (4) and a clamping and translation mechanism, and is characterized in that: A lifting mechanism is provided on the machine table (1). A polishing wheel (3) is installed on the lifting mechanism through a polishing motor (2). A rotating seat (4) is movably installed on the machine table (1) below the polishing wheel (3) through an assembly short shaft. A clamping and translating mechanism for clamping and moving the rack is provided on the rotating seat (4).

2. The oxide scale removal and polishing device for the rack tooth part of a steering gear according to claim 1, wherein: The lifting mechanism consists of a gantry support frame (5), a lifting slide seat (6), a lifting motor (7) and a lifting lead screw (8). The lifting slide seat (6) is movably installed on the gantry support frame (5) through parallel rails. A lifting motor (7) is provided on the gantry support frame (5) above the lifting slide seat (6). The output shaft of the lifting motor (7) is connected to a lifting lead screw (8). The lifting lead screw (8) is connected to the lifting slide seat (6) through a lead screw nut.

3. The deoxidized skin polishing device for the rack tooth part of a steering gear according to claim 2, characterized in that: A plurality of waist-shaped holes (9) are provided on the rotating seat (4). A plurality of positioning holes (10) are provided on the machine table (1) below the waist-shaped holes (9).

4. A descaling and polishing device for the rack teeth of a steering gear according to claim 3, characterized in that: A liquid collecting tank (11) is provided below the positioning hole (10). A discharge port (12) is provided at the bottom of the liquid collecting tank (11); A plurality of confluence ports (13) are provided on the machine table (1) at the rear end of the liquid collecting tank (11). A precipitation and filtration tank (14) is provided below the confluence port (13) and the discharge port (12); A spray head (15) capable of spraying to the bottom end of the polishing wheel (3) is provided on the lifting slide seat (6). The spray head (15) is communicated with the precipitation and filtration tank (14) through a pump.

5. A descaling and polishing device for the rack teeth of a steering gear according to claim 1, characterized in that: The clamping and translating mechanism consists of a positioning seat (16), a clamping cylinder (17), a chuck (18), a translation motor (19) and a translation lead screw (20). A clamping cylinder (17) is provided above the positioning seat (16). A chuck (18) is provided at the end of the piston rod of the clamping cylinder (17); A translation motor (19) is provided below the positioning seat (16). The output shaft of the translation motor (19) is connected to a translation lead screw (20). The translation lead screw (20) is connected to the positioning seat (16) through a lead screw nut; The positioning seat (16) is movably connected to the rotating seat (4) through a rail.

6. The descaling and polishing device for the rack tooth part of a steering gear according to claim 5, characterized in that: A positioning groove (21) is provided on the positioning seat (16) below the chuck (18).

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