Automobile steering knuckle press-fitting device with positioning mechanism

Abstract

This invention relates to the field of steering knuckle press-fitting technology, specifically to an automotive steering knuckle press-fitting device with a positioning mechanism, comprising a press-fitting machine body, a press head, a carrier frame, a press rod, a transmission assembly, a positioning assembly, and a clamping assembly. The carrier frame is fixedly connected to the press-fitting machine body and is used to support the steering knuckle. The press rod is slidably mounted in the carrier frame and is used to support the bushing. The transmission assembly is slidably mounted in the press-fitting machine body, the positioning assembly is slidably mounted on the press-fitting machine body, and the clamping assembly is mounted on the press rod. The press head moves downward to drive the clamping assembly to open the bushing and drive the bushing to be coaxial with the press head. The press head drives the press rod to move downward to squeeze the transmission assembly, thereby driving the positioning assembly to fix the steering knuckle and drive the steering knuckle mounting hole to be coaxial with the press head. This achieves coaxiality of the steering knuckle mounting hole, bushing, and press head during the press-fitting process, as well as clamping and fixing the steering knuckle, improving the positioning accuracy of the steering knuckle and the press-fitting yield.

Description

Technical Field

[0001] This invention relates to the field of steering knuckle press-fitting technology, and more specifically to an automotive steering knuckle press-fitting device with a positioning mechanism. Background Technology

[0002] The steering knuckle is a crucial component of the automotive steering axle. Generally fork-shaped, its main function is to transmit and bear the load from the front of the vehicle, supporting and driving the front wheels to rotate around the kingpin, thus steering the car. Steering knuckles require bushings to be assembled using a steering knuckle press-fit machine with pre-designed holes. However, traditional assembly requires manual positioning, which leads to inaccurate positioning, misalignment during press-fitting, and low assembly efficiency, gradually failing to meet the assembly requirements of production lines.

[0003] Existing technologies have proposed good solutions to this problem, such as patent number CN110142594A, which involves a transverse guide rail connected to the working platform, on which a positioning fixture transfer platform is slidably connected; a product positioning fixture is connected to the upper end of the positioning fixture transfer platform; an upper and lower transfer main pressing mechanism is set above the product positioning fixture, and a reverse support upper and lower transfer mechanism is set behind the positioning fixture; the pressing of the steering knuckle is completed through the cooperation between the servo press and the pressing mechanism, replacing the original manual pressing of the steering knuckle ball joint and improving production efficiency.

[0004] While existing technologies can improve the problem of inaccurate steering knuckle positioning, the following issues still exist: 1. During movement, the clamp is inconvenient to position and hold the steering knuckle, and the irregular shape of the steering knuckle can easily cause unstable clamping; 2. The positioning of the bushing inserted manually into the mounting hole is also inaccurate, and the bushing is prone to tilting to one side, which cannot guarantee coaxiality. Pressing in this state can easily lead to damage to the steering knuckle and result in a low yield.

[0005] In view of the above, in order to overcome the above technical problems, the present invention designs an automotive steering knuckle press-fitting device with a positioning mechanism. Summary of the Invention

[0006] This invention provides an automotive steering knuckle pressing device with a positioning mechanism, which solves the problems of inaccurate steering knuckle positioning and insecure fixing during steering knuckle pressing, and also solves the problem of pressing failure caused by bushing deviating from the center position during bushing pressing. The pre-positioning of the steering knuckle and bushing is achieved through the cooperation of the pressure rod and the carrier frame, and the precise positioning of the steering knuckle and bushing is achieved by converting the pressure of the pressure head through the pressure rod, thereby improving the positioning accuracy and yield of steering knuckle pressing.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A steering knuckle pressing device with a positioning mechanism includes a pressing machine body and a pressing head; it also includes a carrier frame, a pressing rod, a transmission assembly, a positioning assembly, and a clamping assembly. The pressing head is mounted on the pressing machine body, and the carrier frame is fixedly connected to the pressing machine body for supporting the steering knuckle. The pressing rod is slidably mounted in the carrier frame for supporting the bushing. The transmission assembly is slidably mounted in the pressing machine body, the positioning assembly is slidably mounted on the pressing machine body, and the clamping assembly is mounted on the pressing rod. The pressing head moves downward to drive the clamping assembly to open the bushing and drive the bushing to be coaxial with the pressing head. The pressing head drives the pressing rod to move downward to press the transmission assembly. The transmission assembly drives the positioning assembly to slide a preset distance to fix the steering knuckle and drives the steering knuckle mounting hole to be coaxial with the pressing head. The pressing head rises to drive the pressing rod to spring back. The pressing rod drives the transmission assembly to drive the positioning assembly to slide and release the steering knuckle, and the pressing rod lifts the steering knuckle.

[0009] Preferably, the carrier includes a mounting rod, a circular hole, a limiting wall, a limiting groove, and a connecting spring; the mounting rod is coaxially mounted on the pressing machine body with the pressure head; the circular hole is opened at the center of the mounting rod; the pressure rod is slidably mounted in the circular hole; the limiting wall is symmetrically fixedly mounted on both sides of the mounting rod, and the distance between the inner walls of the two sides of the limiting wall is 3cm wider than the steering knuckle forearm; the limiting groove is opened in the mounting rod; one end of the connecting spring is fixedly connected to the lower surface of the limiting groove, and the other end is fixedly connected to the pressure rod; the shape of the rear end face of the limiting wall is the same as the shape of the inner end face of the steering knuckle, and the material of the limiting wall is 40Cr.

[0010] In the above scheme, to prevent press-fitting failure and damage to the steering knuckle due to positional misalignment, the steering knuckle must be positioned and clamped before press-fitting, and the press head, bushing, and steering knuckle mounting hole must be kept coaxial. To avoid interfering with the movement of the press head during press-fitting, the mounting rod is set to be coaxial with the steering knuckle. To restrict the steering knuckle's degrees of freedom, this is achieved before press-fitting by using symmetrically installed limiting walls, ensuring the steering knuckle only has the degree of freedom to rotate around the mounting rod. The distance between the inner walls on both sides of the limiting wall is 3cm wider than the steering knuckle forearm. To facilitate worker installation and to make it easier to position the steering knuckle with the connecting block, as an excessive distance between the inner walls on both sides would result in an excessively large rotation angle of the steering knuckle, which would be detrimental to positioning and clamping, leading to reduced positioning efficiency; given the lack of support on the rear wall of the steering knuckle, the steering knuckle may tip over to the rear wall during press-fitting and positioning. Therefore, the shape of the rear end face of the limiting wall is the same as that of the inner end face of the steering knuckle, which can provide support for the steering knuckle during press-fitting and positioning. The limiting wall is made of 40Cr, which has high extrusion strength, to reduce the stress concentration of the press head on the steering knuckle during press-fitting.

[0011] Preferably, the transmission assembly includes a driven inclined surface, a return spring, a drive rack, a driven rack, a gear, a gear shaft, and a sliding groove; the lower end of the connecting rod is equipped with a drive inclined surface; the sliding groove is formed inside the pressing machine body; the drive rack is slidably installed in the sliding groove; the driven rack is slidably installed in the sliding groove; the driven inclined surface is fixedly connected to the drive rack and cooperates with it; the gear shaft is rotatably connected to the pressing machine body; the gear is fixedly installed on the gear shaft; the return spring is connected between the pressing machine body and the drive rack; the inclination angles of the drive inclined surface and the driven inclined surface are complementary, the inclination angle of the drive inclined surface is set to 40 degrees, and the surface roughness of the drive inclined surface and the driven inclined surface is Ra6.3.

[0012] In the above scheme, the pressure rod is slidably connected in the mounting rod. Through the cooperation of the pressure rod and the mounting rod, the downward movement trend of the pressure head can be converted into the horizontal movement trend of the transmission component. The transmission component cooperates with the positioning component, and the downward movement of the pressure head can be converted into the horizontal movement of the positioning component by rotating the component, thereby realizing the positioning and clamping of the steering knuckle. In order to avoid the vertical component force on the driven inclined surface being too large, which would damage the driven inclined surface and affect the working efficiency of the press machine, the inclination angle of the drive inclined surface is set to 40 degrees. In order to reduce the wear caused by extrusion between the drive inclined surface and the driven inclined surface, the surface roughness of the drive inclined surface and the driven inclined surface is set to Ra6.3.

[0013] Preferably, the pressure rod includes a connecting rod, a connecting plate, and a driving inclined surface; the connecting rod is slidably installed in the circular hole; the connecting plate is fixedly connected to the connecting rod, and its lower end is connected to a connecting spring; the connecting plate is slidably connected in a limiting groove; a serrated rubber layer is installed on the inner wall of the limiting groove, the sharp end of the serrated rubber layer faces downward, and maintains a clearance fit with the connecting plate.

[0014] In the above scheme, the pressure rod can be used to support the bushing. By sliding the pressure rod in the mounting rod, the downward movement of the pressure head can be converted into the horizontal sliding of the transmission component. However, considering that excessive pressure of the pressure head will damage the transmission component, a serrated rubber layer is set on the inner wall of the limiting groove. The sharp end of the serrated rubber layer faces downward, which can apply resistance to the pressure rod during the downward movement of the pressure rod, offset part of the pressure of the pressure rod, and at the same time slow down the downward speed of the pressure rod, so as to reserve sufficient time for the clamping component to adjust the coaxiality of the bushing.

[0015] Preferably, the driven rack and gear are made of 4340 alloy steel, the gear has 24 or more teeth, and the surface is smoothed.

[0016] In the above solution, the positioning component needs to position and clamp the steering knuckle. The horizontal sliding of the positioning component needs to be achieved through the movement of the transmission component. If the positioning component slides too fast, the positioning pin will squeeze the steering knuckle before completing the coaxial guidance, causing wear. In order to ensure the accuracy of the positioning component and that the positioning component will not damage the steering knuckle during its movement, a suitable transmission component needs to be selected. The gear and rack can precisely control the sliding distance and speed of the positioning component. In addition, the gear and rack can bear greater torsional stress, which can accurately fix the positioning component after positioning is completed.

[0017] Preferably, the clamping assembly includes a transmission slider, a calibration slider, a positioning rod, a first mounting slot, a second mounting slot, a helical spring, and a tension spring; the positioning rod is fixedly connected to the upper surface of the connecting rod; the diameter of the positioning rod is 2 cm smaller than the inner diameter of the bushing; the first mounting slot is vertically formed at the center of the positioning rod; the transmission slider is slidably installed in the first mounting slot; the second mounting slot is horizontally formed through the lower part of the positioning rod; the four calibration sliders are symmetrically slidably installed in the second mounting slot; the helical spring connects the calibration slider and the positioning rod; and the tension spring connects the positioning rod and the transmission slider.

[0018] In the above scheme, a positioning rod with a diameter 2cm smaller than the inner diameter of the bushing can be used to pre-position the bushing when the worker places it, so that the bushing has only one degree of freedom of planar sliding. Through the cooperation of the transmission slider and the calibration slider, when the pressure rod is pressed down, the transmission slider will drive the four calibration sliders to extend outward, causing the bushing to slide. When the calibration sliders are extended, the distance between the ends of the two horizontally opposite calibration sliders is equal to the inner diameter of the bushing, and the center of the calibration slider is coaxial with the pressure head. Therefore, when the calibration sliders are ejected, the bushing will slide to be coaxial with the pressure head.

[0019] Preferably, the positioning assembly includes a front hole positioning block, a first mounting groove, a first adjusting spring, a left side hole positioning block, a second mounting groove, a first drive link, a second adjusting spring, a rear side hole positioning block, a third mounting groove, a second drive link, a third adjusting spring, and a positioning pin; the front hole positioning block is fixedly connected to the driven rack; the first mounting groove is formed on the front hole positioning block and is concentric with the front hole of the steering knuckle; the first drive link is fixedly connected to the driven rack; the left side hole positioning block is fixedly connected to the first drive link; the second mounting groove is formed on the left side hole positioning block. The first positioning block is located on the steering knuckle and is concentric with the left side hole of the steering knuckle; the second driving link is fixedly connected to the driving rack; the third rear side hole positioning block is fixedly connected to the driving link; the third mounting groove is formed on the rear side hole positioning block and is coaxial with the rear side hole of the steering knuckle; the three positioning pins are respectively slidably installed in the first mounting groove, the second mounting groove, and the third mounting groove; the first adjusting spring is connected between the positioning pin and the front hole positioning block; the second adjusting spring is connected between the positioning pin and the left side hole positioning block; the third adjusting spring is connected between the positioning pin and the rear side hole positioning block.

[0020] In the above scheme, the positioning component includes three positioning blocks: the front hole positioning block, the left side hole positioning block, and the rear side hole positioning block. The irregular shape of the steering knuckle will cause it to tip over during the positioning process. However, the centers of the front and rear holes of the steering knuckle are on the same axis. Therefore, when the front and rear hole positioning blocks position the steering knuckle at the same time, they can cancel each other out the squeezing force that causes the steering knuckle to shift, ensuring that the steering knuckle will not tip over. At the same time, adding the left side positioning block to position the left side hole of the steering knuckle can make the steering knuckle more stable during the press-fitting process.

[0021] Preferably, the positioning pin includes a conical surface and a cylindrical surface; the diameter of the conical surface gradually increases from the head to the tail, and the tail diameter is equal to the diameter of the front hole of the steering knuckle; the tip of the conical surface is blunted and the surface is smoothed; the diameter of the cylindrical surface is equal to the diameter of the front hole of the steering knuckle.

[0022] In the above scheme, setting the diameter of the locating pin to be equal to the diameter of the front hole of the steering knuckle will cause the locating pin to not be accurately inserted into the front hole of the steering knuckle during the positioning process. Therefore, the locating pin is set to be a combination of a conical surface and a cylindrical surface. The conical surface of the locating pin can guide the steering knuckle to rotate to a position coaxial with the pressure head. In addition, the tip of the locating pin is blunted to avoid additional extrusion wear when the locating pin squeezes the steering knuckle. The surface of the conical surface is smoothed to reduce the frictional resistance when guiding the steering knuckle. Setting the diameter of the cylindrical surface of the locating pin to be equal to the diameter of the front hole of the steering knuckle can stably lock the steering knuckle after positioning and achieve fixation.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. This invention addresses the problem that clamps are inconvenient for positioning and holding steering knuckles during movement, and that the irregular shape of steering knuckles easily causes unstable clamping. By setting up a carrier and positioning components, precise positioning and fixing of the steering knuckle can be achieved during the press-fitting process. For the problem that bushings tend to tilt to one side and cannot guarantee coaxiality, by setting up a pressure rod and clamping components, coaxiality between the steering knuckle mounting hole and the bushing can be accurately achieved, effectively improving the press-fitting yield of steering knuckles.

[0025] 2. Compared to existing steering knuckle pressing machines, which mainly rely on manual placement of the steering knuckle and bushing, this invention addresses the issues of inaccurate positioning and potential steering knuckle misalignment during pressing. By incorporating a support frame, the invention restricts the steering knuckle's degrees of freedom before pressing, ensuring it has only one rotational degree of freedom, thus enhancing the accuracy of steering knuckle positioning. Furthermore, the rear end face of the support frame maintains the same shape as the inner end face of the steering knuckle, increasing stability during positioning and reducing stress concentration.

[0026] 3. By setting a pressure rod, the present invention achieves the pre-positioning of the bushing through the cooperation between the pressure rod, the clamping assembly and the transmission assembly. On the other hand, it converts the downward movement of the pressure head, achieving precise positioning of the bushing. It also enables the transmission assembly to drive the positioning assembly to slide and position and clamp the steering knuckle, keeping the bushing, steering knuckle mounting hole and pressure head coaxial, thus improving the yield of steering knuckle press-fitting. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a front view of the main body of the invention;

[0029] Figure 2 This is a schematic diagram of the structure of the rack, transmission assembly, and positioning assembly of the present invention;

[0030] Figure 3 This is a schematic diagram of the steering knuckle structure of the present invention;

[0031] Figure 4 This is a cross-sectional view of the shelf of the present invention;

[0032] Figure 5 This is a cross-sectional view of the main body of the present invention;

[0033] Figure 6For the present invention in Figure 5 Enlarged view of the structure of section A;

[0034] Figure 7 This is a cross-sectional view of the clamping assembly of the present invention;

[0035] Figure 8 For the present invention in Figure 1 A schematic diagram of the main structure where the pressure head descends to its limit.

[0036] Figure 9 For the present invention in Figure 8 A sectional view of the main structure based on the basic structure;

[0037] Figure 10 This is a schematic diagram of the positioning pin of the present invention;

[0038] Figure 11 For the present invention in Figure 8 A cross-sectional view of the left-side hole positioning block on the foundation.

[0039] In the diagram: 1. Pressing machine body; 2. Press head; a. Steering knuckle; a0. Steering knuckle mounting hole; a1. Steering knuckle forearm; a11. Steering knuckle front hole; a2. Steering knuckle left arm; a21. Steering knuckle left side hole; a3. Steering knuckle rear arm; a31. Steering knuckle rear side hole; b. Bushing; 3. Carrier; 31. Mounting rod; 32. Round hole; 33. Limiting wall; 34. Limiting groove; 341. Serrated rubber layer; 35. Connecting spring; 4. Press rod; 41. Connecting rod; 42. Connecting disc; 43. Drive ramp; 5. Transmission assembly; 51. Driven ramp; 52. Return spring; 53. Drive rack; 54. Driven rack; 55. 56. Gear; 57. Gear shaft; 6. Sliding groove; 6. Positioning assembly; 61. Front hole positioning block; 611. Mounting slide groove one; 612. Adjusting spring one; 62. Left side hole positioning block; 621. Mounting slide groove two; 622. Drive connecting rod one; 623. Adjusting spring two; 63. Rear side hole positioning block; 631. Mounting slide groove three; 632. Drive connecting rod two; 633. Adjusting spring three; 64. Positioning pin; 641. Conical surface; 642. Cylindrical surface; 7. Clamping assembly; 71. Transmission slider; 72. Calibration slider; 73. Positioning rod; 74. Mounting groove one; 75. Mounting groove two; 76. Helical spring; 77. Tension spring. Detailed Implementation

[0040] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0041] Please see Figures 1 to 11 This invention provides an automatic charging device for unmanned aerial vehicles (UAVs), the technical solution of which is as follows:

[0042] A steering knuckle pressing device with a positioning mechanism includes a pressing machine body 1 and a pressing head 2; it also includes a carrier frame 3, a pressing rod 4, a transmission assembly 5, a positioning assembly 6, and a clamping assembly 7. The pressing head 2 is mounted on the pressing machine body 1, and the carrier frame 3 is fixedly connected to the pressing machine body 1 to support the steering knuckle a. The pressing rod 4 is slidably mounted in the carrier frame 3 to support the bushing b. The transmission assembly 5 is slidably mounted in the pressing machine body 1, the positioning assembly 6 is slidably mounted on the pressing machine body 1, and the clamping assembly 7 is mounted on the pressing rod 4. The pressing head 2 moves downward to drive the clamping assembly 7 to open the bushing b and drive the bushing b to be coaxial with the pressing head 2. The pressing head 2 drives the pressing rod 4 to move downward to press the transmission assembly 5. The transmission assembly 5 drives the positioning assembly 6 to slide a preset distance to fix the steering knuckle a and drives the steering knuckle mounting hole a0 to be coaxial with the pressing head 2. The pressing head 2 rises to drive the pressing rod 4 to rebound. The pressing rod 4 drives the transmission assembly 5 to drive the positioning assembly 6 to slide and release the steering knuckle a. The pressing rod 4 lifts the steering knuckle a.

[0043] As a specific embodiment of the present invention, refer to Figure 2 and Figure 4 The carrier 3 includes a mounting rod 31, a circular hole 32, a limiting wall 33, a limiting groove 34, and a connecting spring 35. To avoid interfering with the movement of the pressing head 2 during pressing, the mounting rod 31 is coaxially mounted on the pressing machine body 1 with the pressing head 2. The circular hole 32 is located at the center of the mounting rod 31. The pressing rod 4 is slidably mounted in the circular hole 32. To restrict the degree of freedom of the steering knuckle a, the degree of freedom of the steering knuckle a is restricted before pressing. The limiting wall 33 is symmetrically fixed on both sides of the mounting rod 31. The symmetrically installed limiting wall 33 allows the steering knuckle a to have only the degree of freedom to rotate around the mounting rod 31. The distance between the inner walls on both sides of the limiting wall 33 is 3cm wider than the steering knuckle forearm a1. This distance makes it easier for workers to install the steering knuckle a. The limiting groove 34 is located in the mounting rod 31. One end of the spring 35 is fixedly connected to the lower surface of the limiting groove 34, and the other end is fixedly connected to the pressure rod 4. In addition, in order to prevent the steering knuckle a from tipping over during the pressing process and to reduce the stress concentration during the pressing process, the rear end face shape of the limiting wall 33 is the same as the inner end face shape of the steering knuckle a. In order to increase the load-bearing capacity of the limiting wall 33, the material of the limiting wall 33 is selected as 40Cr with high compressive strength, which can effectively strengthen the support of the steering knuckle a during the pressing and positioning work. In order to prevent the steering knuckle a and bushing b from failing to press due to positional deviation and damage to the steering knuckle a during the pressing process, the steering knuckle a must be positioned and tightened before pressing, and the pressure head 2, bushing b and steering knuckle mounting hole a0 must be kept coaxial. Therefore, the mounting rod 31 is set to be coaxial with the pressure head 2.

[0044] As a specific embodiment of the present invention, refer to Figure 4 and 5The pressure rod 4 includes a connecting rod 41 and a connecting plate 42. The connecting rod 41 is slidably installed in the circular hole 32. The connecting plate 42 is fixedly connected to the connecting rod 41, and its lower end is connected to the connecting spring 35. The connecting plate 42 is slidably connected in the limiting groove 34. Considering that excessive pressure from the pressure head 2 may damage the transmission component 5, a serrated rubber layer 341 is installed on the inner wall of the limiting groove 34. The sharp end of the serrated rubber layer 341 faces downward. The downward-facing sharp end of the serrated rubber layer 341 can be used during the downward sliding process of the pressure head 2. The pressure head 2 is subjected to resistance, which offsets part of the pressure of the pressure head 2 and slows down the descent speed of the pressure head 2, allowing sufficient time for the clamping assembly 7 to adjust the coaxiality of the bushing b. During the return stroke of the pressure head 2, the serrated rubber layer 341 does not apply resistance to the pressure head 2, which can make the return speed of the pressure head 2 faster than the sliding speed during the pressing process. Therefore, the positioning assembly 6 and the clamping assembly 7 can release the steering knuckle a and the bushing b more quickly. This method does not interfere with the movement of the pressure head 2. The material of the serrated rubber layer 341 is nitrile rubber.

[0045] As a specific embodiment of the present invention, refer to Figure 6 The transmission assembly 5 includes a driven inclined surface 51, a return spring 52, a drive rack 53, a driven rack 54, a gear 55, a gear shaft 56, and a sliding groove 57. The lower end of the connecting rod 41 is equipped with a drive inclined surface 43. The sliding groove 57 is formed inside the pressing machine body 1. The drive rack 53 is slidably installed in the sliding groove 57. The driven rack 54 is slidably installed in the sliding groove 57. The driven inclined surface 51 is fixedly connected to the drive rack 53 and cooperates with the drive inclined surface 43. The gear shaft 56 is rotatably connected inside the pressing machine body 1. The gear 55 is fixedly installed on the gear shaft 56. The return spring 52 is connected between the pressing machine body 1 and the drive rack 53. The driving inclined surface 43 and the driven inclined surface 51 have complementary inclination angles. To avoid excessive vertical force on the driven inclined surface 51, which could damage it and affect the pressing efficiency, the inclination angle of the driving inclined surface 43 is set to 40 degrees. To reduce wear caused by compression between the driving inclined surface 43 and the driven inclined surface 51, the surface roughness of both is set to Ra6.3. To improve positioning accuracy and stability, the driven rack 54 and gear 55 are made of 4340 alloy steel, and the number of teeth on gear 55 is greater than... The more teeth there are in gear 55, the more precisely the sliding distance of the positioning component 6 can be controlled. By changing the number of teeth in gear 55, the sliding speed of the positioning component 6 can also be changed, thus making the positioning more stable. Through the cooperation of the pressure head 2 and the mounting rod 31, the downward movement trend of the pressure head 2 can be converted into the horizontal movement trend of the transmission component 5. The transmission component 5 cooperates with the positioning component 6, so that by rotating the component 5, the downward movement of the pressure head 2 can be converted into the horizontal movement of the positioning component 6, thereby realizing the positioning and clamping of the steering knuckle a.

[0046] As a specific embodiment of the present invention, refer to Figure 7 The clamping assembly 7 includes a transmission slider 71, a calibration slider 72, a positioning rod 73, a first mounting slot 74, a second mounting slot 75, a helical spring 76, and a tension spring 77. The positioning rod 73 is fixedly connected to the upper surface of the connecting rod 41. The diameter of the positioning rod 73 is 2cm smaller than the inner diameter of the bushing b. By using the positioning rod 73, which is 2cm smaller than the inner diameter of the bushing b, the bushing b can be pre-positioned when the worker places it, so that the bushing b has only one degree of freedom for sliding in a plane. The first mounting slot 74 is vertically opened at the center of the positioning rod 73. The transmission slider 71 is slidably installed in the first mounting slot 74. The second mounting slot 75 is horizontally opened through the lower part of the positioning rod 73. The four calibration sliders 72 are symmetrically slidably installed in the second mounting slot 75. The helical spring 76... 6 is connected between the calibration slider 72 and the positioning rod 73; the tension spring 77 is connected between the positioning rod 73 and the transmission slider 71. Through the cooperation between the transmission slider 71 and the calibration slider 72, when the pressure head 2 is pressed down, the transmission slider 71 will drive the four calibration sliders 72 to extend outward, causing the bushing b to slide. In the extended state of the calibration slider 72, the distance between the ends of the two horizontally opposite calibration sliders 72 is equal to the inner diameter of the bushing b, and the center of the calibration slider 72 is kept coaxial with the pressure head 2. Therefore, in the ejected state of the calibration slider 72, the bushing b will slide to be coaxial with the pressure head; setting the roughness of the upper surface of the connecting rod 41 and the lower surface of the calibration slider 72 to be equal to Ra6.3 can reduce the resistance of the calibration slider 72 sliding on the upper surface of the connecting rod 41.

[0047] As a specific embodiment of the present invention, refer to Figure 9 and Figure 11The positioning component 6 includes a front hole positioning block 61, a first mounting slide groove 611, a first adjusting spring 612, a left side hole positioning block 62, a second mounting slide groove 621, a first drive linkage 622, a second adjusting spring 623, a rear side hole positioning block 63, a third mounting slide groove 631, a second drive linkage 632, a third adjusting spring 633, and a positioning pin 64; the front hole positioning block 61 is fixedly connected to the driven rack 54; the first mounting slide groove 611 is formed in the front hole positioning block 61. The drive link 622 is fixedly connected to the driven rack 54 and is concentric with the front hole a11 of the steering knuckle; the left side hole positioning block 62 is fixedly connected to the drive link 622; the mounting groove 621 is formed on the left side hole positioning block 62 and is concentric with the left side hole a21 of the steering knuckle; the drive link 632 is fixedly connected to the drive rack 53; the rear side hole positioning block 63 is fixedly connected to the drive link 632; the mounting groove 631 is formed on the left side hole positioning block 62. The rear side hole positioning block 63 is coaxial with the rear side hole a31 of the steering knuckle; three positioning pins 64 are slidably installed in the mounting groove 1 611, mounting groove 2 621 and mounting groove 3 631 respectively; adjusting spring 1 612 is connected between the positioning pin 64 and the front hole positioning block 61; adjusting spring 2 623 is connected between the positioning pin 64 and the left side hole positioning block 62; adjusting spring 3 633 is connected between the positioning pin 64 and the rear side hole positioning block 63; the irregular shape of the steering knuckle a will cause it to tip over during the positioning process, while the centers of the front hole a11 and the rear hole a31 of the steering knuckle are on the same axis. Therefore, when the front hole positioning block 61 and the rear side hole positioning block 63 position the steering knuckle a at the same time, they can cancel each other out the squeezing force that causes the steering knuckle a to deviate, ensuring that the steering knuckle a will not tip over. At the same time, adding the left side positioning block 62 to position the left side hole a21 of the steering knuckle can make the steering knuckle a more stable during the press-fitting process.

[0048] As a specific embodiment of the present invention, refer to Figure 10 The positioning pin 64 includes a conical surface 641 and a cylindrical surface 642. Setting the diameter of the positioning pin 64 to be equal to the diameter of the steering knuckle front hole a11 would prevent the positioning pin 64 from being accurately inserted into the steering knuckle front hole a11 during the positioning process. Therefore, the positioning pin 64 is set to combine the conical surface 641 and the cylindrical surface 642. The diameter of the conical surface 641 gradually increases from the head to the tail, and the diameter of the tail end is equal to the diameter of the steering knuckle front hole a11. The conical surface 641 of the positioning pin can guide the steering knuckle a to rotate to a position coaxial with the pressure head 2. The tip of the conical surface 641 is blunted. Blunting the tip of the positioning pin 64 can avoid additional extrusion wear when the positioning pin 64 presses against the steering knuckle a. The surface of the conical surface 641 is smoothed to reduce the frictional resistance when guiding the steering knuckle a. The diameter of the cylindrical surface 642 is equal to the diameter of the steering knuckle front hole a11. Setting the diameter of the cylindrical surface 642 of the positioning pin to be equal to the diameter of the steering knuckle front hole a11 can stably lock the steering knuckle a after positioning and achieve fixation.

[0049] Workflow: The rack 3 carries the steering knuckle a, the pressure rod 4 carries the bushing b, the pressure head 2 moves downward to drive the clamping assembly 7 to open the bushing b and drive the bushing b to be coaxial with the pressure head 2, the pressure head 2 drives the pressure rod 4 to move downward to squeeze the transmission assembly 5, the transmission assembly 5 drives the positioning assembly 6 to slide a preset distance to fix the steering knuckle a, and drives the steering knuckle mounting hole a0 to be coaxial with the pressure head 2, the pressure head 2 rises to drive the pressure rod 4 to rebound, the pressure rod 4 drives the transmission assembly 5 to drive the positioning assembly 6 to slide to release the steering knuckle a, and the pressure rod 4 lifts the steering knuckle a.

[0050] Specifically, the pressure head 2 is driven by the hydraulic system of the pressing machine body 1. Before pressing, the worker places the steering knuckle a on the carrier 3, inserts the steering knuckle forearm a1 into the limiting wall 33, and then places the bushing b on the pressure rod 4. At this time, the pre-positioning of the bushing b and the steering knuckle a are achieved by the cooperation of the pressure rod 4 and the limiting wall 33, respectively. The pressure head 2 moves downward to squeeze the transmission slider 71. At this time, the transmission slider 71 slides downward to drive the calibration slider 72 to slide outward. The four calibration sliders 72 apply a thrust to the bushing b to drive the bushing b to slide, and finally keep it coaxial with the pressure head 2. The pressure head 2 drives the connecting rod 41 to slide downward. When the connecting rod 41 moves, the serrated rubber layer 341 applies resistance to the connecting disc 42, reducing some of the downward pressure on the connecting rod 41. The connecting rod 41 drives the driving inclined surface 43 to press against the driven inclined surface 51, generating a horizontal component force on the driven inclined surface 51, thereby driving the driving rack 53 to slide horizontally. At this time, the driving rack 53 applies a torsional force, thereby driving the gear 55 to rotate, and through the torsional force of the gear 55 on the driven rack 54, it drives the driven rack 54 to slide towards the steering knuckle a. At this time, the front hole positioning block 61, which is fixedly connected to the driven rack 54, slides towards the steering knuckle front hole a11. At this time, the driving connecting rod 622 and the driven rack... The left side hole positioning block 62, which is fixedly connected to the 54, and the rear side hole positioning block 63, which is fixedly connected to the driven rack 54 via the second drive rod 632, simultaneously receive a pulling force and slide towards the steering knuckle a. The front hole a11 and the rear hole a31 of the steering knuckle are located on the same axis. At this time, the overturning forces of the front hole positioning block 61 and the rear side hole positioning block 63 on the steering knuckle a cancel each other out. At this time, the conical surface 641 presses the front hole a11 of the steering knuckle, guiding the steering knuckle a to rotate and remain coaxial with the pressure head 2. At this time, the front hole positioning block 61, the left side hole positioning block 62, and the rear hole positioning block 63 continue to slide until the cylindrical surface 642 completely locks the steering knuckle a. After the pressing is completed, the press head 2 rises. At this time, the connecting rod 41 slides upward through the elastic force of the connecting spring 35, and the pressure of the driving inclined surface 43 on the driven inclined surface 51 decreases. At this time, the driven inclined surface 51 is pulled by the return spring 52 to slide and reset, and drives the driving rack 53 to slide and reset. At this time, the driving rack 53 generates a torsional force on the gear 55, and drives the driven rack 54 to slide away from the steering knuckle a through the gear 55. The driven rack 54 drives the front hole positioning block 61, the left hole positioning block 62 and the rear hole positioning block 63 to slide away from the steering knuckle a. At this time, the bushing b of the connecting rod 41 generates an upward thrust, thereby lifting the steering knuckle a.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as defined by the appended claims and their equivalents.

Claims

1. A car steering knuckle pressing device with a positioning mechanism, comprising a pressing machine body (1) and a pressing head (2), characterized in that: It also includes a carrying rack (3), a pressure rod (4), a transmission assembly (5), a positioning assembly (6), and a clamping assembly (7); the pressure head (2) is mounted on the pressing machine body (1), the carrying rack (3) is fixedly connected to the pressing machine body (1) and is used to support the steering knuckle (a); the pressure rod (4) is slidably mounted in the carrying rack (3) and is used to support the bushing (b); the transmission assembly (5) is slidably mounted in the pressing machine body (1), the positioning assembly (6) is slidably mounted on the pressing machine body (1), and the clamping assembly (7) is mounted on the pressure rod (4); The rack (3) includes a mounting rod (31), a round hole (32), a limiting wall (33), a limiting groove (34), and a connecting spring (35); the mounting rod (31) is coaxially mounted on the pressing machine body (1) with the pressure head (2), the round hole (32) is opened in the center of the mounting rod (31), and the pressure rod (4) is slidably installed in the round hole (32); the limiting wall (33) is symmetrically fixed on both sides of the mounting rod (31), and the distance between the inner walls on both sides of the limiting wall (33) is 3cm wider than the steering knuckle forearm (a1); the limiting groove (34) is opened in the mounting rod (31), and the connecting spring (35) is connected between the limiting groove (34) and the pressure rod (4); the shape of the rear end face of the limiting wall (33) is the same as the shape of the inner end face of the steering knuckle (a); The pressure rod (4) includes a connecting rod (41), a connecting plate (42), and a driving inclined surface (43). The connecting rod (41) is slidably installed in the round hole (32). The connecting plate (42) is fixedly connected to the connecting rod (41), and its lower end is connected to the connecting spring (35). The connecting plate (42) is slidably connected in the limiting groove (34). A serrated rubber layer (341) is installed on the inner wall of the limiting groove (34). The sharp end of the serrated rubber layer (341) faces downward and maintains a clearance fit with the connecting plate (42). The transmission assembly (5) includes a driven inclined surface (51), a return spring (52), a drive rack (53), a driven rack (54), a gear (55), a gear shaft (56), and a sliding groove (57); the drive inclined surface (43) is installed at the lower end of the connecting rod (41), and the sliding groove (57) is opened in the press body (1); the drive rack (53) and the driven rack (54) are both slidably installed in the sliding groove (57); the driven inclined surface (51) is fixedly connected to the drive rack (53) and cooperates with the drive inclined surface (43); the gear shaft (56) is rotatably connected in the press body (1), and the gear (55) is fixedly installed on the gear shaft (56) and respectively cooperates with the drive rack (53) and the driven rack (54); the return spring (52) is connected between the press body (1) and the drive rack (53); The clamping assembly (7) includes a transmission slider (71), a calibration slider (72), a positioning rod (73), a mounting slot one (74), a mounting slot two (75), a helical spring (76), and a tension spring (77); the positioning rod (73) is fixedly connected to the upper surface of the connecting rod (41), and the diameter of the positioning rod (73) is 2cm smaller than the inner diameter of the bushing (b); the mounting slot one (74) is vertically opened at the center of the positioning rod (73), and the transmission slider (71) is slidably installed in the mounting slot one (74); the mounting slot two (75) is slidably installed in the mounting slot one (74); the mounting slot two (76) is slidably installed in the mounting slot one (74); the mounting slot two (7 ... 75) A horizontal through-hole is opened at the lower part of the positioning rod (73), and the four calibration sliders (72) are symmetrically slidably installed in the second mounting slot (75); the helical spring (76) is connected between the calibration slider (72) and the positioning rod (73), and the tension spring (77) is connected between the positioning rod (73) and the transmission slider (71); when the calibration slider (72) is extended, the distance between the ends of the two horizontally opposite calibration sliders (72) is equal to the inner diameter of the bushing (b), and the center of the calibration slider (72) is coaxial with the pressure head (2); The positioning assembly (6) includes a front hole positioning block (61), a first mounting groove (611), a first adjusting spring (612), a left side hole positioning block (62), a second mounting groove (621), a first drive link (622), a second adjusting spring (623), a rear side hole positioning block (63), a third mounting groove (631), a second drive link (632), a third adjusting spring (633), and a positioning pin (64). The front hole positioning block (61) is fixedly connected to the driven rack (54). The first mounting groove (611) is opened on the front hole positioning block (61) and is concentric with the front hole (a11) of the steering knuckle. The first drive link (622) is fixedly connected to the driven rack (54), and the left side hole positioning block (62) is fixedly connected to the first drive link (622). The second mounting groove (621) is opened on the left side hole positioning block. The first mounting pin (632) is located on the drive rack (53) and is concentric with the left side hole (a21) of the steering knuckle; the second drive link (632) is fixedly connected to the drive rack (53), and the rear side hole positioning block (63) is fixedly connected to the drive link (632); the third mounting groove (631) is opened on the rear side hole positioning block (63) and is coaxial with the rear side hole (a31) of the steering knuckle; the three positioning pins (64) are respectively slidably installed in the first mounting groove (611), the second mounting groove (621) and the third mounting groove (631); the first adjusting spring (612) is connected between the positioning pin (64) and the front hole positioning block (61), the second adjusting spring (623) is connected between the positioning pin (64) and the left side hole positioning block (62), and the third adjusting spring (633) is connected between the positioning pin (64) and the rear side hole positioning block (63); The positioning pin (64) includes a conical surface (641) and a cylindrical surface (642); the diameter of the conical surface (641) gradually increases from the head to the tail, and the tail diameter is equal to the diameter of the steering knuckle front hole (a11); the tip of the conical surface (641) is blunted and the surface is smoothed, and the diameter of the cylindrical surface (642) is equal to the diameter of the steering knuckle front hole (a11); The pressure head (2) moves downward to drive the transmission slider (71) so that the four calibration sliders (72) open the bushing (b) and drive the bushing (b) to be coaxial with the pressure head (2). The pressure head (2) drives the pressure rod (4) to move downward to squeeze the transmission assembly (5). The transmission assembly (5) drives the positioning assembly (6) to slide a preset distance to fix the steering knuckle (a) and drives the steering knuckle mounting hole (a0) to be coaxial with the pressure head (2). The pressure head (2) rises to drive the pressure rod (4) to rebound. The pressure rod (4) drives the transmission assembly (5) to drive the positioning assembly (6) to slide and release the steering knuckle (a). The pressure rod (4) lifts up the steering knuckle (a).

2. The automotive steering knuckle press-fitting device with a positioning mechanism according to claim 1, characterized in that: The limiting wall (33) is made of 40Cr material.

3. The automotive steering knuckle press-fitting device with a positioning mechanism according to claim 1, characterized in that: The inclination angles of the driving inclined surface (43) and the driven inclined surface (51) are complementary. The inclination angle of the driving inclined surface (43) is set to 40 degrees, and the surface roughness of the driving inclined surface (43) and the driven inclined surface (51) is Ra6.

3.

4. The automotive steering knuckle press-fitting device with a positioning mechanism according to claim 1, characterized in that: The driven rack (54) and gear (55) are made of 4340 alloy steel. The gear (55) has 24 teeth or more and its surface is smoothed.

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