High-precision machining equipment for main pin hole of automobile steering knuckle

Abstract

The invention provides automobile steering knuckle main pin hole high-precision machining equipment which comprises a workbench and a steering knuckle body, the workbench is provided with a vertical drilling machine, the vertical drilling machine is provided with a tool bit, the tool bit is arranged above the steering knuckle body, the steering knuckle body comprises a main pin hole located in the middle, and the main pin hole is located in the middle of the steering knuckle body. The steering knuckle positioning device comprises a working table, a steering knuckle body, a first arm body, a second arm body, a supporting seat and a first positioning device, the supporting seat is arranged on the lower end face of the steering knuckle body and used for placing the steering knuckle body, the first positioning device comprises a steering table arranged on the working table, and a first air cylinder and a fixing plate are arranged on the steering table. A pressing rod is hinged to the upper end of the first air cylinder, a connecting plate is arranged in the middle of the pressing rod, the pressing rod is connected with the fixing plate through the connecting plate, and the end of the pressing rod is arranged above the first arm body.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts processing, and in particular to high-precision processing equipment for a kingpin hole of an automobile steering knuckle. Background Art

[0002] The vehicle steering knuckle is an important component of the vehicle, which has very high requirements for precision. The traditional steering knuckle processing technology has multiple processing steps, and the complexity of the process can easily cause processing errors due to disassembly, rotation, and re-positioning and clamping of the steering knuckle during processing because the positioning reference cannot be completely consistent, thereby causing the problem of reduced processing accuracy. Reducing the processing steps can reduce the processing errors caused by re-positioning and clamping. Therefore, the drilling accuracy of the steering knuckle depends on the positioning device of the steering knuckle.

[0003] The patent publication number CN207953677U was retrieved, and the patent name is a public material of a steering knuckle positioning tool. It specifically discloses a steering knuckle positioning tool, including: a tooling plate; a pin column arranged on the tooling plate and used to position the pin hole of the steering knuckle; a steering knuckle tapered hole positioning member, the steering knuckle tapered hole positioning member has a support seat arranged on the tooling plate and a positioning member arranged on the support seat, the support seat has a positioning hole for aligning with the tapered hole of the steering knuckle, and the positioning member has a positioning column for passing through the tapered hole of the steering knuckle and the positioning hole. Preferably, in the above-mentioned steering knuckle positioning tool, the pin column is an elastic pin column that can be extended and retracted in a direction perpendicular to the tooling plate. Preferably, in the above-mentioned steering knuckle positioning tool, the pin column includes: a pin column part for cooperating with the pin hole of the steering knuckle; an elastic part connecting the pin column part and the tooling plate. To improve the positioning accuracy of the steering knuckle; ensure the assembly accuracy of the front brake angle unit; reduce the misjudgment rate of end face runout detection, and ensure production efficiency.

[0004] The patent publication number CN211332223U was retrieved, and the patent name is a public material of a fixture for finishing a steering knuckle, and specifically discloses a fixture for finishing a steering knuckle, including a base, a support plate and a bottom plate are arranged on the top of the base, the support plate is located on one side of the bottom plate, and a first through hole and a processing hole are opened on one side outer wall of the support plate, the first through hole is located on one side of the processing hole, a fixing plate is arranged on the top of the base, a second through hole is opened on one side outer wall of the fixing plate at a position close to the first through hole, and a side plate is arranged on the outer wall of one side of the fixing plate adjacent to the second through hole. Preferably, a screw is connected to the outer wall of one side of the side plate by threaded engagement, a clamping block is arranged at one end of the screw, a V-shaped groove is opened on the outer wall of the clamping block on the side away from the screw, and a total of four screws are arranged, and the four screws are symmetrically arranged on the outer wall of one side of the side plate. Preferably, a first fixing hole is provided at the center of the top of the fixing plate, and a second fixing hole is provided at the center of the top of the supporting plate, bolts are passed through the first fixing hole and the second fixing hole, and a positioning plate is fixedly connected to the top of the supporting plate and the fixing plate at one side near the bolts. Preferably, a limiting seat is provided at the top of the positioning plate, and a V-shaped inclined surface is provided on one side outer wall of the limiting seat. Preferably, two adjusting support bolts are symmetrically provided at the top of the base near the supporting plate and the fixing plate. Preferably, three grooves are evenly provided on one side outer wall of the base.

[0005] By analyzing the above-mentioned public materials, it can be known that the positioning of the steering knuckle can be achieved, but the positioning accuracy is insufficient, especially for the arm body that plays a steering role, because the arm body is arc-shaped and it is not easy to position accurately. Summary of the invention

[0006] In view of this, the present invention provides a high-precision processing device for the kingpin hole of an automobile steering knuckle, which can not only realize the fine processing of the kingpin hole of the steering knuckle, but also has accurate positioning and convenient operation.

[0007] In order to solve the above technical problems, the present invention provides a high-precision processing device for a kingpin hole of an automobile steering knuckle, comprising a workbench and a steering knuckle body, wherein a vertical drilling machine is arranged on the workbench, a cutter head is arranged on the vertical drilling machine, and the cutter head is arranged above the steering knuckle body, wherein the steering knuckle body comprises a kingpin hole located in the middle, a first arm body and a second arm body, and further comprises:

[0008] A support seat, which is arranged on the lower end surface of the steering knuckle body and is used for placing the steering knuckle body;

[0009] A first positioning device, the first positioning device comprises a turning platform arranged on the workbench, the turning platform is provided with a first cylinder and a fixed plate, the upper end of the first cylinder is hinged with a pressure rod, the middle part of the pressure rod is provided with a connecting plate, and the connecting plate is connected to the fixed plate, and the end of the pressure rod is arranged above the first arm body;

[0010] A second positioning device, the second positioning device comprises a second cylinder arranged on the workbench, the upper end of the second cylinder is connected to a fixing frame, the fixing frame is provided with a gear, the gear is connected to a telescopic plate, the telescopic plate is provided with a third cylinder, and the telescopic rod of the third cylinder is directed toward the direction of the second arm body;

[0011] The third positioning device includes a third cylinder, the telescopic rod of the third cylinder faces the side of the second arm body, and the third positioning device also includes a screw rod, the screw rod is connected to a vertical plate, the third cylinder is arranged on the vertical plate, and the screw rod is connected to a fourth cylinder.

[0012] Furthermore, there are two first positioning devices, which respectively fix the two first arm bodies on the steering knuckle body. The steering platform is a rotating structure, connected to the motor, and the motor drives the steering platform to rotate horizontally. The first cylinder is vertically arranged on the steering platform, and a first pin is arranged at the end of the telescopic rod of the first cylinder, and is connected to the pressure rod through the first pin.

[0013] Furthermore, the tail of the pressure rod is a U-shaped structure, clamping the end of the telescopic rod of the first cylinder. The upper end of the connecting plate is connected to the pressure rod through a pin, and the lower end is connected to the fixed plate through a pin. There are two connecting plates, which are respectively arranged on both sides of the pressure rod.

[0014] Furthermore, the pressure rod is L-shaped, and a pad is fixedly provided at the end of the pressure rod, and is contacted and connected to the first arm body through the pad.

[0015] Furthermore, the second cylinder is fixed on the workbench and the second cylinder is vertically arranged. The top of the telescopic rod of the second cylinder is connected to the fixed frame by bolts. The fixed frame is H-shaped and horizontally arranged. The two sides of the fixed frame are side panels, and a spacing is left between the side panels. The spacing is used to place the telescopic plate. The telescopic plate and the fixed frame are connected by a slide. The gear is arranged on the side panel. A rack is arranged on the side of the telescopic plate, and the rack is meshed with the gear. The gear is connected to the first motor through a bearing arranged on the side panel. The first motor is fixed to the upper end surface of the side panel.

[0016] Furthermore, the slide is a T-shaped slide, the telescopic plate is arranged in a U-shaped groove formed by a fixed frame, the telescopic plate is arranged horizontally, the end of the telescopic plate is connected to a fourth cylinder, the telescopic rod of the fourth cylinder contacts the upper end surface of the second arm body, and the fourth cylinder is arranged obliquely.

[0017] Furthermore, two third positioning devices are provided on the screw rod and are arranged on both sides of the second arm body. The screw rod is installed on the workbench through plate-like fixing parts at both ends, and the screw rod and the plate-like fixing parts are connected by bearings. The thread on the screw rod is half positive thread and half negative thread. By rotating the screw rod, the third positioning device can move forward or backward, and the third cylinder is arranged horizontally.

[0018] Furthermore, a cushion block is arranged below the steering knuckle body, and the upper end surface of the cushion block is arranged at an angle to support the second arm body.

[0019] Furthermore, a laser level is provided on the workbench to monitor the levelness of the steering knuckle body placed on the support seat.

[0020] The beneficial effects of the above technical solution of the present invention are as follows:

[0021] 1. The kingpin hole of the steering knuckle can be finely processed. By setting a hollow structure support seat, a cushion block and a vertical drilling machine, the kingpin hole on the steering knuckle body can be processed.

[0022] 2. Accurate positioning and convenient operation. By setting the first positioning device, the second positioning device and the third positioning device, the steering knuckle body can be stably fixed on the workbench. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front view of the present invention;

[0024] Figure 2 for Figure 1 axonometric drawing;

[0025] Figure 3 for Figure 1 A schematic diagram of the structure from another perspective;

[0026] Figure 4 for Figure 2 A magnified view of middle;

[0027] Figure 5 for Figure 3 Enlarged view of middle B;

[0028] In the figure: 1. workbench; 2. vertical drilling machine; 3. support seat; 4. steering knuckle body; 5. first arm body; 6. second arm body; 7. first positioning device; 701. steering table; 702. first cylinder; 703. pressure rod; 704. pad; 705. connecting plate; 706. fixing plate; 707. first pin shaft; 8. second positioning device; 801. second cylinder; 802. fixing frame; 803. side plate; 804. telescopic plate; 805. gear; 806. first motor; 807. rack; 9. third positioning device; 901. third cylinder; 902. screw; 903. third motor; 10. fourth cylinder; 11. kingpin hole; 12. cutter head; 13. laser level; 14. pad. DETAILED DESCRIPTION

[0029] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the following will be combined with the appended drawings of the embodiments of the present invention. Figure 1-5 , the technical scheme of the embodiment of the present invention is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0030] like Figure 1-5 As shown:

[0031] Example 1

[0032] A high-precision processing device for a kingpin hole of an automobile steering knuckle, comprising a workbench 1 and a steering knuckle body 4, wherein a vertical drilling machine 2 is arranged on the workbench 1, a cutter head 12 is arranged on the vertical drilling machine 2, and the cutter head 12 is arranged above the steering knuckle body 4, the steering knuckle body 4 comprises a kingpin hole 11 located in the middle, and a first arm body 5 and a second arm body 6, and further comprises a support seat 3, wherein the support seat 3 is arranged on the lower end surface of the steering knuckle body 4 and is used for placing the steering knuckle body 4; a first positioning device 7, wherein the first positioning device 7 comprises a steering table 701 arranged on the workbench 1, wherein a first cylinder 702 and a fixing plate 706 are arranged on the steering table 701, wherein a pressure rod 703 is hingedly connected to the upper end of the first cylinder 702, wherein a connecting plate 705 is arranged in the middle of the pressure rod 703, and the connecting plate 705 is connected to the fixing plate 706, the end of the pressing rod 703 is arranged above the first arm body 5; the second positioning device 8, the second positioning device 8 includes a second cylinder 801 arranged on the workbench 1, the upper end of the second cylinder 801 is connected to a fixed frame 802, the fixed frame 802 is provided with a gear 805, the gear 805 is connected to a telescopic plate 804, the telescopic plate 804 is provided with a third cylinder 901, the telescopic rod of the third cylinder 901 is toward the direction of the second arm body 6; the third positioning device 9, the third positioning device 9 includes a third cylinder 901, the telescopic rod of the third cylinder 901 is toward the side of the second arm body 6, the third positioning device 9 also includes a screw 902, the screw 902 is connected to a vertical plate, the third cylinder 901 is arranged on the vertical plate, and the screw 902 is connected to the fourth cylinder 10.

[0033] In this embodiment, the workbench 1 is a table structure, and a vertical drilling machine 2 is installed on the workbench 1. A support seat 3 is also fixedly arranged on the workbench 1. The middle position of the support seat 3 is provided with upper and lower through holes. The steering knuckle body 4 is placed on the support seat 3, and the position of the main pin hole 11 is aligned with the through hole position. A first positioning device 7, a second positioning device 8 and a third positioning device 9 are respectively arranged on the workbench 1. Due to the structural irregularity of the steering knuckle body 4, it includes two first arm bodies 5 and one second arm body 6. The first arm body 5 is symmetrically arranged along the central axis. The first positioning device 7 is used to fix the first arm body 5, and the second positioning device 8 is used to position the second arm body 6.

[0034] Example 2

[0035] There are two first positioning devices 7, which respectively fix the two first arms 5 on the steering knuckle body 4. The steering platform 701 is a rotary structure, connected to a motor, and driven by the motor to rotate horizontally. The first cylinder 702 is vertically arranged on the steering platform 701, and a first pin shaft 707 is arranged at the end of the telescopic rod of the first cylinder 702, and is connected to the pressure rod 703 through the first pin shaft 707.

[0036] Different from the above embodiment, in this embodiment, the first positioning device 7 includes a turning table 701 arranged on the workbench 1, and the turning table 701 is a truncated cone structure. A first cylinder 702 and a fixed plate 706 are arranged at the upper end of the turning table 701. The upper end of the first cylinder 702 is connected to a pressure rod 703 through a first pin shaft 707. A connecting plate 705 is arranged in the middle of the pressure rod 703, and is connected to the fixed plate 706 through the connecting plate 705. The end of the pressure rod 703 is arranged above the first arm body 5.

[0037] Example 3

[0038] The tail of the pressure rod 703 is a U-shaped structure, clamping the end of the telescopic rod of the first cylinder 702. The upper end of the connecting plate 705 is connected to the pressure rod 703 through a pin shaft, and the lower end is connected to the fixed plate 706 through a pin shaft. There are two connecting plates 705, which are respectively arranged on both sides of the pressure rod 703.

[0039] Different from the above embodiment, in this embodiment, the tail of the pressure rod 703 is a U-shaped structure, and the connection with the first cylinder 702 is stable. The connecting plate 705 plays a connecting effect. During the swinging process of the pressure rod 703, the angle change can be achieved through the pin shaft.

[0040] Example 4

[0041] The pressure rod 703 is in an L-shape, and a pad 704 is fixedly provided at the end of the pressure rod 703 , and is in contact with and connected to the first arm 5 via the pad 704 .

[0042] Different from the above embodiment, in this embodiment, in order to improve the pressing degree of the first arm body 5, the pressure rod 703 is designed to be L-shaped, and the end of the shorter rod presses the first arm body 5. A pad 704 can also be arranged between the pressure rod 703 and the first arm body 5. The pad 704 is made of wear-resistant steel to avoid the influence of vibration during the drilling process.

[0043] Example 5

[0044] The second cylinder 801 is fixed on the workbench 1, and the second cylinder 801 is vertically arranged. The top of the telescopic rod of the second cylinder 801 is connected to the fixed frame 802 by bolts. The fixed frame 802 is H-shaped and horizontally arranged. The two sides of the fixed frame 802 are side panels 803, and a spacing is left between the side panels 803. The spacing is used to place the telescopic plate 804. The telescopic plate 804 is connected to the fixed frame 802 through a slide. The gear 805 is arranged on the side panel 803. A rack 807 is arranged on the side of the telescopic plate 804, and the rack 807 is meshed with the gear 805. The gear 805 is connected to the first motor 806 through a bearing arranged on the side panel 803. The first motor 806 is fixed to the upper end surface of the side panel 803.

[0045] Different from the above embodiment, in this embodiment, the second cylinder 801 is vertically arranged to drive the fixing frame 802 to move up and down. The fixing frame 802 is horizontally arranged. Side panels 803 are arranged on both sides of the fixing frame 802, and a U-shaped groove is formed on the fixing frame 802. A telescopic plate 804 is placed in the groove. The structure of the telescopic plate 804 is a strip block. The telescopic plate 804 structure above the second arm body 6 is inclined downward to facilitate the installation of the fourth cylinder 10.

[0046] Example 6

[0047] The slide is a T-shaped slide, the telescopic plate 804 is arranged in a U-shaped groove formed by the fixing frame 802, the telescopic plate 804 is arranged horizontally, the end of the telescopic plate 804 is connected to the fourth cylinder 10, the telescopic rod of the fourth cylinder 10 contacts the upper end surface of the second arm body 6, and the fourth cylinder 10 is arranged obliquely.

[0048] Different from the above embodiment, in this embodiment, in order to ensure the stability of the telescopic plate 804 during operation, the slide is set to a T-shaped structure, which can also play a limiting role. Through the action of the fourth cylinder 10, the upper end surface of the second arm body 6 can be squeezed and fixed.

[0049] Example 7

[0050] Two third positioning devices 9 are arranged on the screw rod 902 and are arranged on both sides of the second arm body 6. The screw rod 902 is installed on the workbench 1 through plate-like fixing parts at both ends, and the screw rod 902 and the plate-like fixing parts are connected through bearings. The thread on the screw rod 902 is half positive thread and half negative thread. By rotating the screw rod 902, the third positioning device 9 can move forward or backward. The third cylinder 901 is arranged horizontally.

[0051] Different from the above-mentioned embodiment, in this embodiment, in order to prevent the second arm body 6 from swinging in the horizontal direction during the processing, a third positioning device 9 is provided to fix the second arm body 6 from both sides.

[0052] Example 8

[0053] A cushion block 14 is further provided below the steering knuckle body 4 , and the upper end surface of the cushion block 14 is inclined to support the second arm body 6 . A laser level 13 is provided on the workbench 1 to monitor the levelness of the steering knuckle body 4 placed on the support seat 3 .

[0054] Different from the above embodiment, in this embodiment, since the second arm body 6 has an arc-shaped structure, a cushion block 14 with an inclined upper end surface structure is provided at the lower end of the second arm body 6, so that the second arm body 6 can be well supported.

[0055] Working method (or working principle) of the present invention:

[0056] When the present technology is working, the support seat 3, the vertical drilling machine 2 and the cushion block 14 are all fixed on the workbench 1, and the automobile steering knuckle with the kingpin hole 11 to be processed is placed on the support seat 3. At this time, the two first arms 5 on the steering knuckle body 4 are placed at the first positioning device 7, and the second arm 6 is placed at the second positioning device 8. An operation panel is set on the workbench 1. Through the operation panel and the controller to control the electrical, the pressure rod 703 on the first positioning device 7 is rotated and the first cylinder 702 is operated to lift one end of the pressure rod 703, and the other end squeezes and fixes the first arm 5. Then the second cylinder 801 in the second positioning device 8 is operated, and then the telescopic plate 804 is extended through the first motor 806, and the fourth cylinder 10 is transported to the top of the second arm 6. After the fourth cylinder 10 is operated, the upper end surface of the second arm 6 is squeezed and fixed. The laser level 13 is used to monitor the horizontality at the position of the kingpin hole 11 of the steering knuckle body 4.

[0057] In the present invention, unless otherwise clearly stipulated and limited, for example, it can be a fixed connection, a detachable connection, or an integrated one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0058] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A high-precision processing device for a kingpin hole of an automobile steering knuckle, comprising a workbench (1) and a steering knuckle body (4), wherein a vertical drilling machine (2) is arranged on the workbench (1), a cutter head (12) is arranged on the vertical drilling machine (2), and the cutter head (12) is arranged above the steering knuckle body (4), wherein the steering knuckle body (4) comprises a kingpin hole (11) located in the middle, a first arm body (5) and a second arm body (6), and wherein: Also includes, A support seat (3), the support seat (3) being arranged on the lower end surface of the steering knuckle body (4) and being used for placing the steering knuckle body (4); A first positioning device (7), the first positioning device (7) comprising a turning platform (701) arranged on the workbench (1), the turning platform (701) being provided with a first cylinder (702) and a fixing plate (706), the upper end of the first cylinder (702) being hinged with a pressure rod (703), the middle part of the pressure rod (703) being provided with a connecting plate (705) and connected to the fixing plate (706) via the connecting plate (705), the end of the pressure rod (703) being arranged above the first arm body (5); A second positioning device (8), the second positioning device (8) comprising a second cylinder (801) arranged on the workbench (1), the upper end of the second cylinder (801) being connected to a fixing frame (802), the fixing frame (802) being provided with a gear (805), the gear (805) being connected to a telescopic plate (804), the telescopic plate (804) being provided with a third cylinder (901), the telescopic rod of the third cylinder (901) being directed toward the second arm body (6); A third positioning device (9), the third positioning device (9) comprises a third cylinder (901), the telescopic rod of the third cylinder (901) faces the side of the second arm body (6), the third positioning device (9) further comprises a screw rod (902), the screw rod (902) is connected to a vertical plate, the third cylinder (901) is arranged on the vertical plate, and the screw rod (902) is connected to a fourth cylinder (10).

2. The high-precision processing equipment for the kingpin hole of an automobile steering knuckle according to claim 1 is characterized in that: There are two first positioning devices (7), which respectively fix the two first arm bodies (5) on the steering knuckle body (4); the steering platform (701) is a rotary structure, connected to a motor, and the steering platform (701) is driven by the motor to rotate horizontally; the first cylinder (702) is vertically arranged on the steering platform (701); the end of the telescopic rod of the first cylinder (702) is provided with a first pin shaft (707), and is connected to the pressure rod (703) through the first pin shaft (707).

3. The high-precision processing equipment for the kingpin hole of an automobile steering knuckle according to claim 2 is characterized in that: The tail of the compression rod (703) is a U-shaped structure, clamping the end of the telescopic rod of the first cylinder (702); the upper end of the connecting plate (705) is connected to the compression rod (703) via a pin shaft, and the lower end is connected to the fixing plate (706) via a pin shaft. There are two connecting plates (705), which are respectively arranged on both sides of the compression rod (703).

4. The high-precision processing equipment for kingpin holes of automobile steering knuckles according to claim 3 is characterized in that: The pressure rod (703) is L-shaped, and a pad (704) is fixedly provided at the end of the pressure rod (703), and is in contact with and connected to the first arm body (5) via the pad (704).

5. The high-precision processing equipment for kingpin holes of automobile steering knuckles according to claim 4 is characterized in that: The second cylinder (801) is fixed on the workbench (1), and the second cylinder (801) is arranged vertically. The top of the telescopic rod of the second cylinder (801) is connected to the fixed frame (802) by bolts. The fixed frame (802) is in an H-shaped shape and is arranged horizontally. The two sides of the fixed frame (802) are side panels (803), and a spacing is left between the side panels (803). The spacing is used to place the telescopic plate (804). The telescopic plate (804) and the fixed frame (802) are connected by a slideway. The gear (805) is arranged on the side panel (803). A rack (807) is arranged on the side of the telescopic plate (804), and the rack (807) is meshed with the gear (805). The gear (805) is connected to the first motor (806) through a bearing arranged on the side panel (803), and the first motor (806) is fixed to the upper end surface of the side panel (803).

6. The high-precision processing equipment for the kingpin hole of an automobile steering knuckle according to claim 5, characterized in that: The slide is a T-shaped slide. The telescopic plate (804) is arranged in a U-shaped groove formed by a fixed frame (802). The telescopic plate (804) is arranged horizontally. The end of the telescopic plate (804) is connected to a fourth cylinder (10). The telescopic rod of the fourth cylinder (10) contacts and is connected to the upper end surface of the second arm body (6). The fourth cylinder (10) is arranged obliquely.

7. The high-precision processing equipment for kingpin holes of automobile steering knuckles according to claim 6 is characterized in that: Two third positioning devices (9) are arranged on the screw rod (902) and are arranged on both sides of the second arm body (6). The screw rod (902) is installed on the workbench (1) through plate-shaped fixing parts at both ends, and the screw rod (902) and the plate-shaped fixing parts are connected through bearings. The thread on the screw rod (902) is half positive thread and half negative thread. By rotating the screw rod (902), the third positioning device (9) can move forward or backward. The third cylinder (901) is arranged horizontally.

8. The high-precision processing equipment for kingpin holes of automobile steering knuckles according to claim 7 is characterized in that: A cushion block (14) is also arranged below the steering knuckle body (4), and the upper end surface of the cushion block (14) is arranged at an angle to support the second arm body (6).

9. The high-precision processing equipment for kingpin holes of automobile steering knuckles according to claim 8, characterized in that: The workbench (1) is provided with a laser level (13) for monitoring the level of the steering knuckle body (4) placed on the support seat (3).

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