Turning nut inner thread processing device

Abstract

The utility model provides a kind of steering nut inner channel processing device, belong to the positioning technical field of machining fixture, including installation base plate, one side fixed mounting of installation base plate has workpiece clamping cylinder, the both sides of workpiece clamping cylinder are equipped with driving mechanism, the output end fixed connection of driving mechanism has pressure head connecting plate, the side fixed mounting of pressure head connecting plate close to workpiece clamping cylinder is equipped with positioning clamping block, the end of positioning clamping block away from pressure head connecting plate passes through the lateral wall of workpiece clamping cylinder and extends to workpiece clamping cylinder interior, the inside fixed of workpiece clamping cylinder is equipped with the positioning tile for making workpiece outer circle axis and processing device axis coincide, the positioning tile is oppositely arranged with positioning clamping block.This steering nut inner channel processing device guarantees the machining precision of workpiece inner channel in processing process.

Description

Technical Field

[0001] This utility model relates to the field of mechanical processing fixture positioning technology, specifically to a device for machining the internal thread of a steering nut. Background Technology

[0002] As the number of cars on the road continues to rise, people are paying more and more attention to driving safety. The performance of the car's steering system is directly related to overall driving safety. The steering gear is the most critical actuator in the car's steering system. Through the upgrades and iterations of mechanical steering gears, hydraulic power steering gears, electro-hydraulic power steering gears, and pure electric steering gears, new requirements have been placed on the machining precision of the internal parts of the steering gear, especially the steering nut, which is of paramount importance.

[0003] Machining steering nuts has always been a challenging task. Currently, pure electric steering systems place even higher demands on the machining of steering nuts, mainly including:

[0004] 1. The coaxiality requirement between the outer diameter of the steering nut and the inner thread diameter is higher in order to reduce the deformation of the steering nut under high load.

[0005] 2. The requirements for the position of the guide hole and the inner thread of the steering nut are further improved to ensure smooth operation of the steel ball during the nut mating process, and to avoid quality problems such as jamming of the steel ball when entering the guide and abnormal noise caused by impacting the guide, thereby affecting the product life and safety.

[0006] Therefore, we propose a device for machining the internal thread of a steering nut. Utility Model Content

[0007] The purpose of this invention is to provide a device for machining the internal thread of a steering nut, so as to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] This utility model provides a device for machining the internal thread of a steering nut, including a mounting base plate. A workpiece clamping cylinder is fixedly mounted on one side of the mounting base plate. A drive mechanism is mounted on both sides of the workpiece clamping cylinder. A pressure head connecting plate is fixedly connected to the output end of the drive mechanism. A positioning clamping block is fixedly mounted on the side of the pressure head connecting plate near the workpiece clamping cylinder. The end of the positioning clamping block away from the pressure head connecting plate extends through the side wall of the workpiece clamping cylinder into the interior of the workpiece clamping cylinder. A positioning tile is fixedly provided inside the workpiece clamping cylinder to make the outer diameter axis of the workpiece coincide with the axis of the machining device. The positioning tile is arranged opposite to the positioning clamping block.

[0010] Furthermore, a flange is fixedly installed on the side of the mounting base plate away from the workpiece clamping cylinder, and the flange is used to connect to the spindle of the processing equipment.

[0011] Furthermore, the workpiece clamping cylinder includes an upper workpiece clamping cylinder and a lower workpiece clamping cylinder. The upper workpiece clamping cylinder and the lower workpiece clamping cylinder are fixedly connected. An elongated hole is provided on the upper workpiece clamping cylinder. The end of the positioning clamping block away from the pressure head connecting plate extends through the elongated hole into the interior of the workpiece clamping cylinder.

[0012] Furthermore, the driving mechanism includes a thin hydraulic cylinder, which is fixedly mounted on the mounting base plate via a base. A connecting rod is fixedly connected to the end of the piston rod of the thin hydraulic cylinder, and the end of the connecting rod away from the thin hydraulic cylinder is fixedly connected to the pressure head connecting plate.

[0013] Furthermore, a mounting base is fixedly installed on the mounting base, and a linear bearing is installed on the mounting base. The end of the connecting rod away from the thin hydraulic cylinder passes through the linear bearing and is fixedly connected to the pressure head connecting plate.

[0014] Compared with the prior art, the present invention has the following technical effects:

[0015] 1. In this utility model, the workpiece is placed on the positioning tile inside the workpiece clamping cylinder. The positioning tile cooperates with the outer circle of the workpiece to make the axis of the workpiece coincide with the axis of the processing device. The drive mechanism drives the pressure head connecting plate to move downward. The positioning clamping block installed on the pressure head connecting plate moves downward together to press the workpiece, restricting the axial movement and circumferential rotation of the workpiece, thereby ensuring the processing accuracy of the inner thread of the workpiece during the processing.

[0016] 2. In this utility model, the workpiece clamping cylinder includes an upper workpiece clamping cylinder and a lower workpiece clamping cylinder. The workpiece clamping cylinder is divided into two parts. Compared with the integrated design of the workpiece clamping cylinder, this facilitates the replacement of workpieces of different sizes. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the processing device according to an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the processing device for mounting the workpiece according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the flange structure according to an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the mounting base plate according to an embodiment of the present utility model;

[0021] Figure 5This is a schematic diagram of the structure of the clamping sleeve mounted on the workpiece according to an embodiment of the present utility model;

[0022] Figure 6 This is a schematic diagram of the workpiece lower clamping cylinder according to an embodiment of the present utility model;

[0023] Figure 7 This is a schematic diagram of the pressure head connecting plate according to an embodiment of the present utility model;

[0024] Figure 8 This is a schematic diagram of the positioning clamping block according to an embodiment of the present utility model.

[0025] In the diagram: 1. Flange, 2. Mounting base plate, 3. Workpiece clamping sleeve, 31. Upper workpiece clamping sleeve, 32. Lower workpiece clamping sleeve, 4. Long slot, 5. Drive mechanism, 51. Thin hydraulic cylinder, 52. Base, 53. Connecting rod, 54. Mounting seat, 55. Linear bearing, 6. Pressure head connecting plate, 7. Positioning clamping block, 8. Positioning tile, 9. Oil pipeline, 91. First oil pipeline, 92. Second oil pipeline, 93. Third oil pipeline, 94. Fourth oil pipeline, 10. Mounting groove. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1 to 8 This embodiment provides a device for machining the internal thread of a rotating nut, including a mounting base plate 2. A workpiece clamping cylinder 3 is fixedly mounted on one side of the mounting base plate 2. A drive mechanism 5 is mounted on both sides of the workpiece clamping cylinder 3. A pressure head connecting plate 6 is fixedly connected to the output end of the drive mechanism 5. A positioning clamping block 7 is fixedly mounted on the side of the pressure head connecting plate 6 near the workpiece clamping cylinder 3. The positioning clamping block 7 can be made of 45# steel or 40Cr through heat treatment, and the hardness is preferably between HRC45-55. The end of the positioning clamping block 7 away from the pressure head connecting plate 6 extends through the side wall of the workpiece clamping cylinder 3 into the interior of the workpiece clamping cylinder 3, and this end is provided with an arc-shaped end. The size of the arc is selected according to the tooth module of the workpiece (i.e., the rotating nut) to ensure that the arc-shaped end of the positioning clamping block 7 contacts the rack pitch line of the workpiece when clamping the workpiece. The positioning clamping block 7 presses the middle external tooth groove of the workpiece to restrict the axial movement and circumferential rotation of the workpiece, ensuring the axial position and circumferential angle of the workpiece during processing, thereby ensuring the stability of the relative position between the internal thread and the guide hole when the workpiece is processed.

[0028] Specifically, a positioning tile 8 is installed inside the workpiece clamping cylinder 3. The positioning tile 8 is positioned opposite to the positioning clamping block 7. The positioning tile 8 is used to make the outer diameter axis of the workpiece coincide with the axis of the machining device, ensuring that the axis of the machined internal thread is coincident with the outer diameter axis of the workpiece, thus meeting the coaxiality requirements of the outer diameter and the internal thread. The positioning tile 8 can be made of ordinary 45# steel or 40Cr quenched and tempered steel, with a hardness between HRC45-55. After the positioning tile 8 is installed on the workpiece clamping cylinder 3, the side of the positioning tile 8 away from the workpiece clamping cylinder 3 contacts the workpiece. The surface of the positioning tile 8 that contacts the workpiece is an arc surface, and the diameter of the arc is equal to the diameter of the outer diameter of the workpiece. When the positioning tile 8 contacts the workpiece, it is a surface contact. Thus, when the positioning tile 8 mates with the outer diameter of the workpiece, it ensures that the axis of the workpiece coincides with the axis of the machining device, thereby ensuring that the axis of the workpiece and the axis of the machined internal thread are on the same straight line.

[0029] Specifically, in this utility model, the workpiece is placed on the positioning tile 8 inside the workpiece clamping cylinder 3. The positioning tile 8 cooperates with the outer circle of the workpiece, so that the axis of the workpiece coincides with the axis of the processing device. The drive mechanism 5 drives the pressure head connecting plate 6 to move downward. The positioning clamping block 7 installed on the pressure head connecting plate 6 moves downward together, pressing the workpiece and restricting the axial movement and circumferential rotation of the workpiece. Through the cooperation of the positioning tile 8 and the positioning clamping block 7, the processing accuracy of the inner thread of the workpiece is ensured during the processing, that is, the axis of the inner thread of the workpiece is coincided with the axis of the outer circle of the workpiece, and the stability of the relative position between the inner thread and the guide hole is ensured when the inner thread of the workpiece is processed.

[0030] Specifically, a flange 1 is fixedly installed on the side of the mounting base plate 2 away from the workpiece clamping cylinder 3. The flange 1 is used to connect with the spindle of the processing equipment. A mounting groove 10 is provided on the side of the mounting base plate 2 that connects with the flange 1. An oil supply pipe 9 extends into the mounting groove 10 and communicates with the rotary cylinder inside the spindle of the processing equipment.

[0031] Specifically, the workpiece clamping cylinder 3 includes an upper workpiece clamping cylinder 31 and a lower workpiece clamping cylinder 32. The upper workpiece clamping cylinder 31 and the lower workpiece clamping cylinder 32 are fixedly connected. An elongated hole 4 is provided on the upper workpiece clamping cylinder 31. The end of the positioning clamping block 7 away from the pressure head connecting plate 6 extends into the interior of the workpiece clamping cylinder 3 through the elongated hole 4. When the positioning clamping block 7 moves up and down, the elongated hole 4 guides the positioning clamping block 7, ensuring the positioning accuracy of the processing device during the repeated clamping and releasing process of the workpiece.

[0032] Specifically, the workpiece clamping cylinder 3 includes an upper workpiece clamping cylinder 31 and a lower workpiece clamping cylinder 32. The workpiece clamping cylinder 3 is divided into two parts. Compared with the integrated design of the workpiece clamping cylinder 3, this facilitates the replacement of workpieces of different sizes.

[0033] Specifically, the drive mechanism 5 includes a thin hydraulic cylinder 51, which is fixedly mounted on the mounting base 2 via a base 52. A connecting rod 53 is fixedly connected to the end of the piston rod of the thin hydraulic cylinder 51. The end of the connecting rod 53 away from the thin hydraulic cylinder 51 passes through a linear bearing 55 and is fixedly connected to the pressure head connecting plate 6. The linear bearing 55 is fixedly mounted on the mounting base 2 via a mounting seat 54. The thin hydraulic cylinder 51 is connected to the rotary cylinder inside the spindle of the processing equipment through the oil supply pipe 9. The oil supply pipe 9 includes a first oil supply pipe 91, a second oil supply pipe 92, a third oil supply pipe 93, and a fourth oil supply pipe 94. The two ends of the first oil supply pipe 91 are connected to the first oil ports of the thin hydraulic cylinder 51 on both sides of the workpiece clamping cylinder 3, respectively. One end of the second oil supply pipe 92 is connected to the first oil supply pipe 91, and the other end of the second oil supply pipe 92 extends into the mounting groove 10 and is connected to the rotary cylinder inside the spindle of the processing equipment. The two ends of the third oil supply pipe 93 are connected to the second oil ports of the thin hydraulic cylinder 51 on both sides of the workpiece clamping cylinder 3, respectively. One end of the fourth oil supply pipe 94 is connected to the third oil supply pipe 93, and the other end of the fourth oil supply pipe 94 extends into the mounting groove 10 and is connected to the rotary cylinder inside the spindle of the processing equipment.

[0034] Specifically, during operation, when the thin hydraulic cylinder 51 is supplied with oil through the first oil supply pipe 91 and the second oil supply pipe 92, and returns oil through the third oil supply pipe 93 and the fourth oil supply pipe 94, the piston rod drives the pressure head connecting plate 6 to move downward, and the positioning clamping block 7 moves downward together, then clamps the middle external tooth groove of the steering nut, realizing the axial and circumferential positioning of the steering nut; when the thin hydraulic cylinder 51 returns oil through the first oil supply pipe 91 and the second oil supply pipe 92, and supplies oil through the third oil supply pipe 93 and the fourth oil supply pipe 94, the piston rod drives the pressure head connecting plate 6 to move upward, and the positioning clamping block 7 moves upward together, then releases the workpiece.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A device for machining the internal thread of a steering nut, characterized in that, The device includes a mounting base plate (2), on one side of which a workpiece clamping cylinder (3) is fixedly mounted. Drive mechanisms (5) are mounted on both sides of the workpiece clamping cylinder (3). A pressure head connecting plate (6) is fixedly connected to the output end of the drive mechanism (5). A positioning clamping block (7) is fixedly mounted on the side of the pressure head connecting plate (6) near the workpiece clamping cylinder (3). The end of the positioning clamping block (7) away from the pressure head connecting plate (6) extends through the side wall of the workpiece clamping cylinder (3) into the interior of the workpiece clamping cylinder (3). A positioning tile (8) is fixedly provided inside the workpiece clamping cylinder (3) to make the outer circle axis of the workpiece coincide with the axis of the processing device. The positioning tile (8) is arranged opposite to the positioning clamping block (7).

2. The device for machining the internal thread of a steering nut according to claim 1, characterized in that, A flange (1) is fixedly installed on the side of the mounting base plate (2) away from the workpiece clamping cylinder (3), and the flange (1) is used to connect to the spindle of the processing equipment.

3. The device for machining the internal thread of a steering nut according to claim 1, characterized in that, The workpiece clamping cylinder (3) includes an upper workpiece clamping cylinder (31) and a lower workpiece clamping cylinder (32). The upper workpiece clamping cylinder (31) and the lower workpiece clamping cylinder (32) are fixedly connected. An elongated hole (4) is provided on the upper workpiece clamping cylinder (31). The end of the positioning clamping block (7) away from the pressure head connecting plate (6) extends through the elongated hole (4) into the interior of the workpiece clamping cylinder (3).

4. The device for machining the internal thread of a steering nut according to claim 1, characterized in that, The drive mechanism (5) includes a thin hydraulic cylinder (51), which is fixedly mounted on the mounting base plate (2) via a base (52). The piston rod of the thin hydraulic cylinder (51) is fixedly connected to a connecting rod (53), and the end of the connecting rod (53) away from the thin hydraulic cylinder (51) is fixedly connected to the pressure head connecting plate (6).

5. The device for machining the internal thread of a steering nut according to claim 4, characterized in that, A mounting base (54) is fixedly installed on the mounting base plate (2), and a linear bearing (55) is installed on the mounting base (54). The end of the connecting rod (53) away from the thin hydraulic cylinder (51) passes through the linear bearing (55) and is fixedly connected to the pressure head connecting plate (6).

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