A high-precision machining equipment for kingpin holes in automotive steering knuckles

Abstract

This invention provides a high-precision machining equipment for the kingpin hole of an automotive steering knuckle, comprising a worktable and a steering knuckle body. A vertical drilling machine is mounted on the worktable, and a cutting head is mounted on the drilling machine above the steering knuckle body. The steering knuckle body includes a kingpin hole located in the middle, a first arm, and a second arm. It also includes a support base located on the lower end face of the steering knuckle body for placement. A first positioning device includes a steering table mounted on the worktable, a first cylinder, and a fixed plate. A pressure rod is hinged to the upper end of the first cylinder, and a connecting plate is located in the middle of the pressure rod, connecting the fixed plate. The end of the pressure rod is located above the first arm. The advantages are that it not only enables precision machining of the steering knuckle kingpin hole but also provides accurate positioning and convenient operation.

Description

Technical Field

[0001] This invention relates to the technical field of automotive parts processing, specifically to a high-precision machining equipment for the kingpin hole of an automotive steering knuckle. Background Technology

[0002] The steering knuckle is a crucial component of a vehicle, requiring high precision. Traditional steering knuckle manufacturing processes involve multiple steps, and the complexity of these steps can easily lead to machining errors during disassembly, repositioning, and re-clamping due to inconsistent positioning references. This results in decreased machining accuracy. Reducing the number of machining steps can minimize machining errors caused by repositioning and clamping. Therefore, the drilling accuracy of the steering knuckle depends on its positioning device.

[0003] A patent publication with publication number CN207953677U, entitled "A Steering Knuckle Positioning Fixture," was found. The patent specifically discloses a steering knuckle positioning fixture, comprising: a fixture plate; a pin disposed on the fixture plate for positioning the pin hole of the steering knuckle; and a steering knuckle cone hole positioning component. The steering knuckle cone hole positioning component has a support seat disposed on the fixture plate and a positioning component disposed on the support seat. The support seat has a positioning hole for aligning with the cone hole of the steering knuckle, and the positioning component has a positioning post for passing through the cone hole and the positioning hole of the steering knuckle. Preferably, in the above-mentioned steering knuckle positioning fixture, the pin is an elastic pin capable of extending and retracting in a direction perpendicular to the fixture plate. Preferably, in the above-mentioned steering knuckle positioning fixture, the pin includes: a pin portion for engaging with the pin hole of the steering knuckle; and an elastic portion connecting the pin portion and the fixture plate. This improves steering knuckle positioning accuracy; ensures the assembly accuracy of the front brake angle unit; reduces the false judgment rate of end face runout detection; and ensures production efficiency.

[0004] A patent publication number CN211332223U was found, entitled "A Fixture for Precision Machining of Steering Knuckles," which specifically discloses a fixture for precision machining of steering knuckles. The fixture includes a base, a support plate and a bottom plate on the top of the base, the support plate being located on one side of the bottom plate, and a first through hole and a machining hole on one side of the outer wall of the support plate. The first through hole is located on one side of the machining hole. A fixing plate is located on the top of the base, and a second through hole is located on one side of the outer wall of the fixing plate near the first through hole. A side plate is located on the outer wall of the fixing plate adjacent to the second through hole. Preferably, a screw is threadedly connected to one side of the outer wall of the side plate, and a clamping block is provided at one end of the screw. A V-groove is provided on the outer wall of the clamping block away from the screw. Four screws are provided, symmetrically arranged on one side of the outer wall of the side plate. Preferably, a first fixing hole is formed at the top center of the fixing plate, and a second fixing hole is formed at the top center of the support plate. Bolts pass through both the first and second fixing holes. A positioning plate is fixedly connected to the top of the support plate and the fixing plate near the bolts. Preferably, a limiting seat is provided on the top of the positioning plate, and a V-shaped bevel is formed on one side of the outer wall of the limiting seat. Preferably, two adjusting support bolts are symmetrically arranged on the top of the base near the support plate and the fixing plate. Preferably, three grooves are evenly formed on one side of the outer wall of the base.

[0005] Analysis of the publicly available materials shows that all of them can achieve steering knuckle positioning, but the positioning accuracy is insufficient, especially for the boom that plays a steering role, because the boom is curved and not easy to position accurately. Summary of the Invention

[0006] In view of this, the present invention provides a high-precision machining equipment for the kingpin hole of an automotive steering knuckle, which can not only achieve precision machining of the kingpin hole of the steering knuckle, but also has accurate positioning and is easy to operate.

[0007] To address the aforementioned technical problems, this invention provides a high-precision machining equipment for the kingpin hole of an automotive steering knuckle, comprising a worktable and a steering knuckle body. A vertical drilling machine is mounted on the worktable, and a cutting head is mounted on the vertical drilling machine, positioned above the steering knuckle body. The steering knuckle body includes a kingpin hole located in the center, a first arm body, and a second arm body, and further includes…

[0008] A support base is disposed on the lower end face of the steering knuckle body and is used for placing the steering knuckle body;

[0009] The first positioning device includes a turntable mounted on a workbench, a first cylinder and a fixed plate mounted on the turntable, a pressure rod hinged to the upper end of the first cylinder, a connecting plate mounted in the middle of the pressure rod and connected to the fixed plate through the connecting plate, and the end of the pressure rod mounted above the first arm body.

[0010] The second positioning device includes a second cylinder mounted on a workbench, a fixed frame connected to the upper end of the second cylinder, a gear mounted on the fixed frame, a telescopic plate connected to the gear, a third cylinder mounted on the telescopic plate, and the telescopic rod of the third cylinder facing the direction of the second arm.

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

[0012] Furthermore, there are two first positioning devices, which respectively fix the two first arms on the steering knuckle body. The steering table is a rotary structure, connected to a motor, and driven by the motor to rotate horizontally. The first cylinder is vertically mounted on the steering table, and the end of the telescopic rod of the first cylinder is provided with a first pin, which is connected to the pressure rod.

[0013] Furthermore, the tail of the pressure rod has a U-shaped structure, which clamps the end of the telescopic rod of the first cylinder. The upper end of the connecting plate is connected to the pressure rod by a pin, and the lower end is connected to the fixing plate by a pin. There are two connecting plates, which are respectively set 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 the first arm body is connected through the pad.

[0015] Furthermore, the second cylinder is fixed on the workbench and 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 plates, and there is a gap between the side plates for placing the telescopic plate. The telescopic plate is connected to the fixed frame by a slide rail. The gear is arranged on the side plate, and the side of the telescopic plate is provided with a rack, which meshes with the gear. The gear is connected to the first motor through a bearing arranged on the side plate. The first motor is fixed to the upper end face of the side plate.

[0016] Furthermore, the slide is a T-shaped slide, the telescopic plate is set in the U-shaped groove formed by the fixed frame, the telescopic plate is set horizontally, the end of the telescopic plate is connected to a fourth cylinder, the telescopic rod of the fourth cylinder contacts and connects to the upper end face of the second arm, and the fourth cylinder is set at an angle.

[0017] Furthermore, two third positioning devices are provided on the screw and are located on both sides of the second arm. The screw is mounted on the worktable through plate-shaped fasteners at both ends, and the screw and the plate-shaped fasteners are connected by bearings. The thread on the screw is half positive thread and half negative thread. By rotating the screw, the third positioning device can move in the opposite direction. The third cylinder is set horizontally.

[0018] Furthermore, a pad is provided below the steering knuckle body, and the upper end surface of the pad is inclined to support the second arm.

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

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

[0021] 1. It can perform precision machining of the kingpin hole of the steering knuckle. By setting a hollow support base, pad block and vertical drilling machine, the kingpin hole on the steering knuckle body can be machined.

[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 worktable. Attached Figure Description

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

[0024] Figure 2 for Figure 1 Axonometric drawing;

[0025] Figure 3 for Figure 1 A structural diagram from another perspective;

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

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

[0028] In the diagram: 1. Worktable; 2. Vertical drilling machine; 3. Support base; 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; 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. Main pin hole; 12. Cutting head; 13. Laser level; 14. Pad block. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of the present invention. Figure 1-5 The technical solutions of the embodiments of the present invention will be clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention are within the scope of protection of the present invention.

[0030] like Figure 1-5 As shown:

[0031] Example 1

[0032] A high-precision machining equipment for the kingpin hole of an automotive steering knuckle includes a worktable 1 and a steering knuckle body 4. A vertical drilling machine 2 is mounted on the worktable 1, and a cutting head 12 is mounted on the vertical drilling machine 2, positioned above the steering knuckle body 4. The steering knuckle body 4 includes a kingpin hole 11 located in the center, a first arm 5, and a second arm 6. It also includes a support base 3, which is located on the lower end face of the steering knuckle body 4 for placement. A first positioning device 7 includes a steering table 701 mounted on the worktable 1. The steering table 701 is equipped with a first cylinder 702 and a fixing plate 706. A pressure rod 703 is hinged to the upper end of the first cylinder 702, and a connecting plate 705 is located in the middle of the pressure rod 703, connecting the fixing plate to the pressure rod 703. 706, the end of the pressure rod 703 is located above the first arm body 5; the second positioning device 8 includes a second cylinder 801 mounted 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 faces the direction of the second arm body 6; the third positioning device 9 includes 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 also includes a screw 902, the screw 902 is connected to a vertical plate, the third cylinder 901 is mounted on the vertical plate, and the screw 902 is connected to a 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 base 3 is also fixedly installed on the workbench 1. The middle position of the support base 3 is provided with upper and lower through holes. The steering knuckle body 4 is placed on the support base 3, and the position of the main pin hole 11 is aligned with the position of the through hole. A first positioning device 7, a second positioning device 8 and a third positioning device 9 are respectively installed on the workbench 1. Due to the irregular structure of the steering knuckle body 4, it includes two first arm bodies 5 and one second arm body 6. The first arm bodies 5 are 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 table 701 is a rotary structure, connected to a motor, and driven by the motor to rotate horizontally. The first cylinder 702 is vertically mounted on the steering table 701. The end of the telescopic rod of the first cylinder 702 is provided with a first pin 707, and is connected to the pressure rod 703 through the first pin 707.

[0036] Unlike the above embodiments, in this embodiment, the first positioning device 7 includes a turntable 701 set on the worktable 1. The turntable 701 has a frustum structure. A first cylinder 702 and a fixing plate 706 are set at the upper end of the turntable 701. A pressure rod 703 is connected to the upper end of the first cylinder 702 through a first pin 707. A connecting plate 705 is set in the middle of the pressure rod 703 and is connected to the fixing plate 706 through the connecting plate 705. The end of the pressure rod 703 is set above the first arm body 5.

[0037] Example 3

[0038] The tail of the pressure rod 703 has a U-shaped structure, which clamps 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 by a pin, and the lower end is connected to the fixing plate 706 by a pin. There are two connecting plates 705, which are respectively arranged on both sides of the pressure rod 703.

[0039] Unlike the above embodiments, in this embodiment, the tail of the pressure rod 703 has a U-shaped structure, which is stably connected to the first cylinder 702. The connecting plate 705 serves as a connection, and the angle can be changed through the pin during the swinging process of the pressure rod 703.

[0040] Example 4

[0041] The pressure rod 703 is L-shaped, and a pad 704 is fixedly provided at the end of the pressure rod 703, and the first arm body 5 is connected to it through the pad 704.

[0042] Unlike the above embodiments, in this embodiment, in order to improve the clamping force on the first arm body 5, the pressure rod 703 is designed as an L-shape, and the end of the shorter rod presses against the first arm body 5. A pad 704 can also be provided between the pressure rod 703 and the first arm body 5. The pad 704 is made of wear-resistant steel to avoid the impact of vibration during drilling.

[0043] Example 5

[0044] The second cylinder 801 is fixed on the workbench 1 and 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 plates 803, and there is a gap between the side plates 803 for placing the telescopic plate 804. The telescopic plate 804 is connected to the fixed frame 802 by a slide rail. The gear 805 is arranged on the side plate 803. The side of the telescopic plate 804 is provided with a rack 807, and the rack 807 meshes with the gear 805. The gear 805 is connected to the first motor 806 through a bearing arranged on the side plate 803. The first motor 806 is fixed on the upper end face of the side plate 803.

[0045] Unlike the above embodiments, in this embodiment, the second cylinder 801 is vertically arranged and can drive the fixed frame 802 to move up and down. The fixed frame 802 is horizontally arranged, and side plates 803 are arranged on both sides of the fixed frame 802, forming a U-shaped groove. A telescopic plate 804 is placed in the groove. The telescopic plate 804 has a strip-shaped structure. The telescopic plate 804 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, and the telescopic plate 804 is set in the U-shaped groove formed by the fixed frame 802. The telescopic plate 804 is set horizontally, and the end of the telescopic plate 804 is connected to a fourth cylinder 10. The telescopic rod of the fourth cylinder 10 contacts and connects to the upper end face of the second arm body 6. The fourth cylinder 10 is set at an angle.

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

[0049] Example 7

[0050] Two third positioning devices 9 are provided on the screw 902 and are located on both sides of the second arm 6. The screw 902 is mounted on the worktable 1 through plate-shaped fasteners at both ends, and the screw 902 is connected to the plate-shaped fasteners through bearings. The thread on the screw 902 is half positive thread and half negative thread. By rotating the screw 902, the third positioning device 9 can move in the forward or backward direction. The third cylinder 901 is set horizontally.

[0051] Unlike the above embodiments, in this embodiment, in order to prevent the second arm 6 from swinging horizontally during processing, a third positioning device 9 is set to fix the second arm 6 from both sides.

[0052] Example 8

[0053] A pad 14 is also provided below the steering knuckle body 4. The upper end surface of the pad 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] Unlike the above embodiments, in this embodiment, since the structure of the second arm 6 is arc-shaped, the lower end of the second arm 6 is provided with a pad 14 with an inclined upper surface, which can provide good support for the second arm 6.

[0055] The working method (or working principle) of this invention:

[0056] In operation, the support base 3, vertical drilling machine 2, and pad 14 are all fixed on the worktable 1. The automotive steering knuckle with the master pin hole 11 to be machined is placed on the support base 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 worktable 1. Through the operation panel and controller, 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, while the other end is pressed and fixed to the first arm 5. Then, the second cylinder 801 in the second positioning device 8 is operated, and the telescopic plate 804 is extended by the first motor 806, which transports the fourth cylinder 10 to the top of the second arm 6. After the fourth cylinder 10 is operated, the upper end face of the second arm 6 is pressed and fixed. The laser level 13 is used to monitor the levelness of the master pin hole 11 position of the steering knuckle body 4.

[0057] In this invention, unless otherwise explicitly specified and limited, for example, it can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements or an interaction between two elements. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A high-precision machining equipment for kingpin holes in automotive steering knuckles, comprising a worktable (1) and a steering knuckle body (4), wherein a vertical drilling machine (2) is provided on the worktable (1), and a cutting head (12) is provided on the vertical drilling machine (2), the cutting head (12) being positioned above the steering knuckle body (4), the steering knuckle body (4) comprising a kingpin hole (11) located in the middle, and a first arm body (5) and a second arm body (6), characterized in that: It also includes, Support base (3), which is disposed on the lower end face of the steering knuckle body (4) and is used for placing the steering knuckle body (4); The first positioning device (7) includes a turntable (701) set on the worktable (1), a first cylinder (702) and a fixing plate (706) are set on the turntable (701), a pressure rod (703) is hinged to the upper end of the first cylinder (702), a connecting plate (705) is set in the middle of the pressure rod (703), and the fixing plate (706) is connected through the connecting plate (705), and the end of the pressure rod (703) is set above the first arm body (5); The second positioning device (8) includes a second cylinder (801) set 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 the second cylinder (801), and the telescopic rod of the second cylinder (801) is directed toward the second arm body (6); The third positioning device (9) includes a third cylinder (901), the telescopic rod of the third cylinder (901) faces the side of the second arm (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 set on the vertical plate, and the screw (902) is connected to a third motor (903); The second cylinder (801) is fixed on the workbench (1) and 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 plates (803) and there is a gap between the side plates (803). This gap is used to place the telescopic plate (804). The telescopic plate (804) is connected to the fixed frame (802) by a slide rail. The gear (805) is arranged on the side plate (803). The side of the telescopic plate (804) is provided with a rack (807) and the rack (807) meshes with the gear (805). The gear (805) is connected to the first motor (806) through the bearing arranged on the side plate (803). The first motor (806) is fixed on the upper end face of the side plate (803). The slide is a T-shaped slide, and the telescopic plate (804) is set in the U-shaped groove formed by the fixed frame (802). The telescopic plate (804) is set horizontally, and the end of the telescopic plate (804) is connected to a fourth cylinder (10). The telescopic rod of the fourth cylinder (10) contacts and connects to the upper end face of the second arm body (6). The fourth cylinder (10) is set at an angle.

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

3. The high-precision machining equipment for the kingpin hole of an automotive steering knuckle according to claim 2, characterized in that: The tail of the pressure rod (703) has a U-shaped structure, which clamps 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) by a pin, and the lower end is connected to the fixing plate (706) by a pin. There are two connecting plates (705), which are respectively set on both sides of the pressure rod (703).

4. The high-precision machining equipment for the kingpin hole of an automotive steering knuckle according to claim 3, 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 the first arm body (5) is connected through the pad (704).

5. The high-precision machining equipment for the kingpin hole of an automotive steering knuckle according to claim 1, characterized in that: Two vertical plates are provided on the screw (902) and are respectively located on both sides of the second arm (6). The screw (902) is installed on the workbench (1) through plate-shaped fasteners at both ends, and the screw (902) and the plate-shaped fasteners are connected by bearings. The thread on the screw (902) is half positive thread and half negative thread. By rotating the screw (902), the two vertical plates can move towards each other or away from each other. The third cylinder (901) is set horizontally.

6. The high-precision machining equipment for the kingpin hole of an automotive steering knuckle according to claim 5, characterized in that: A pad (14) is also provided below the steering knuckle body (4). The upper end surface of the pad (14) is inclined to support the second arm body (6).

7. A high-precision machining equipment for the kingpin hole of an automotive steering knuckle according to claim 6, characterized in that: A laser level (13) is installed on the workbench (1) to monitor the levelness of the steering knuckle body (4) placed on the support seat (3).

Images