A steel sleeve pressing device for automobile steering knuckle

Abstract

This utility model relates to a pressing device for automotive steering knuckle sleeves, comprising a base plate, two guide shafts, an upper pressure plate, an adapter, a connecting rod, a pressure head, a contour post, several elastic plungers, a support seat, a floating core, and a first spring. Linear bearings are fixedly embedded at both ends of the upper pressure plate, and the two linear bearings are slidably mounted on the two guide shafts, thus forming a rigid guiding structure. When an external press moves the upper pressure plate downwards via the adapter, the stability of the upper pressure plate's movement is ensured, thereby ensuring the stability of the pressure head's movement, effectively suppressing pressure head movement deviation, and ensuring the accuracy of the sleeve pressing. The inner groove at the top of the floating core avoids the bottom of the contour post, and the top edge of the floating core forms a supporting contact with the bottom of the sleeve. Thus, the downward force of the pressure head and the reverse supporting force of the floating core form a two-way constraint system, ensuring that the sleeve remains horizontal during the pressing process, further guaranteeing the accuracy of the sleeve pressing.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts manufacturing technology, and in particular relates to a pressing device for automotive steering knuckle steel sleeves. Background Technology

[0002] As a core transmission component of the automotive steering system, the steering knuckle's structural design must balance mechanical performance and kinematic characteristics. This component, formed through precision casting or forging, is a complex casting structure primarily responsible for transmitting dynamic loads from the wheel suspension system and coordinating steering movements. During vehicle steering, the steering knuckle must achieve multi-degree-of-freedom kinematic characteristics. Its key performance parameters include bending stiffness, torsional stiffness, and corrosion resistance. Especially under complex operating conditions, it must meet fatigue strength requirements under dynamic loads to ensure vehicle handling stability and steering response accuracy. The stress concentration areas of this component need to be optimized through finite element analysis to ensure reliable fatigue resistance even under high-frequency alternating loads.

[0003] With the increasing national emphasis on energy conservation and emission reduction, the demand for lightweight vehicles is becoming more and more stringent. Currently, domestic OEMs are searching for new solutions, such as replacing cast iron or forged steel steering knuckles with aluminum alloy ones, which can significantly reduce weight. However, because aluminum alloy has lower yield strength, tensile strength, and hardness than traditional cast iron and steel, it is often necessary to press a harder steel sleeve into the connection area (mounting hole) of the aluminum alloy steering knuckle. The steel sleeve must be press-fitted into the mounting hole to ensure that the aluminum alloy steering knuckle does not collapse.

[0004] The conventional pressing method for steel sleeves involves placing the steel sleeve in the mounting hole of the steering knuckle and then using a servo press head to press the steel sleeve into the mounting hole by applying pressure to the upper surface of the steel sleeve. This pressing method makes the steel sleeve extremely prone to skewing and cannot guarantee the pressing accuracy of the steel sleeve. Utility Model Content

[0005] The main objective of this invention is to provide a pressing device for automotive steering knuckle steel sleeves, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A device for pressing automotive steering knuckle steel sleeves, comprising:

[0008] Base plate;

[0009] Two guide shafts are fixed on the top sides of the base plate;

[0010] The upper pressure plate has linear bearings fixedly embedded at both ends, and the two linear bearings are slidably sleeved on the two guide shafts respectively;

[0011] An adapter, fixed to the top of the upper pressure plate, is used to connect to the press;

[0012] The connecting rod is fixed to the bottom of the upper pressure plate;

[0013] The pressure head is fixed to the bottom of the connecting rod;

[0014] A contoured column is fixed at the bottom center of the pressure head, and the outer contour of the contoured column is adapted to the inner wall of the steel sleeve.

[0015] Several elastic plungers are circumferentially embedded in the outer wall of the contoured column near the bottom.

[0016] A support base is fixed to the top center of the base plate, located directly below the pressure head, and the support base has a sliding groove that extends downward from the top.

[0017] A floating core is slidably installed in the sliding groove, and the top of the floating core has an inner groove that avoids the bottom of the contour column;

[0018] The first spring is fixedly connected to the base plate at its bottom and to the floating core at its top. The floating core extends out of the support seat when it is unpressured, supported by the first spring.

[0019] Preferably, the device also includes

[0020] Two nylon blocks are fixed to the top of the base plate on both sides of the support seat. The inner side of the top of the nylon blocks has a support slope that is adapted to the back of the steering knuckle.

[0021] Preferably, the device also includes

[0022] Two support sleeves are respectively fixed to the lower part of the two guide shafts;

[0023] Two second springs are respectively sleeved on the upper part of the two guide shafts, with their bottoms fixedly connected to the support sleeves and their tops fixedly connected to the linear bearings.

[0024] Preferably, the resilient plunger includes

[0025] A plunger housing is fixedly embedded in the outer wall of the contoured column near the bottom, and the plunger has an inner cavity;

[0026] A ball bearing is slidably mounted at the front end of the inner cavity;

[0027] The third spring is located in the inner cavity, with one end fixedly connected to the ball and the other end fixedly connected to the rear end of the inner cavity.

[0028] Preferably, the support includes

[0029] The base is fixed to the top of the base plate;

[0030] The support block is detachably fixed to the base and is used to support the steering knuckle.

[0031] Preferably, the device also includes

[0032] The first photoelectric detection unit is fixed in front of the contour column via an extension plate and is used to detect whether the steel sleeve is placed backwards.

[0033] Two second photoelectric detection units are fixed on the base plate and located on both sides of the support base, used to detect the left and right placement direction of the steering knuckle.

[0034] This utility model provides a pressing device for automotive steering knuckle steel sleeves, which has the following advantages:

[0035] 1. In the initial state, the contour post and the floating core are separated. Supported by the first spring, the top of the floating core extends beyond the support seat. At this time, the steering knuckle can be placed on the support seat, and the mounting hole passes through the floating core to accurately position the steering knuckle. Then, the steel sleeve is installed. The steel sleeve is fitted onto the contour post from bottom to top. The elastic plunger deforms and makes room under the compression of the steel sleeve. When the steel sleeve completely passes through the elastic plunger, the elastic plunger resets and limits the steel sleeve, so that the steel sleeve is stably locked on the contour post. The outer contour of the contour post matches the inner wall of the steel sleeve, which can ensure the accurate positioning of the steel sleeve and the stability of the pressing process.

[0036] 2. Linear bearings are fixedly embedded at both ends of the upper pressure plate of this device. The two linear bearings are slidably sleeved on the two guide shafts, thus forming a rigid guide structure. When the external press drives the upper pressure plate to move downward through the adapter, the stability of the upper pressure plate movement can be ensured, thereby ensuring the stability of the press head movement, effectively suppressing the offset of the press head movement, and ensuring the accuracy of the steel sleeve pressing.

[0037] 3. During the pressing process, the inner groove at the top of the floating core avoids the bottom of the conforming column, and the top edge of the floating core forms a supporting contact with the bottom of the steel sleeve. When the press head is pressed down, the first spring is compressed and deformed to generate a reverse supporting force, which supports the bottom of the steel sleeve through the floating core. In this way, the downward force of the press head and the reverse supporting force of the floating core form a two-way constraint system, which keeps the steel sleeve in a horizontal position during the pressing process and avoids the tendency to tilt due to uneven force, further ensuring the accuracy of the steel sleeve pressing. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of the automotive steering knuckle steel sleeve pressing device of this utility model;

[0039] Figure 2 This is a sectional view of the automotive steering knuckle steel sleeve pressing device of this utility model;

[0040] Figure 3 This utility model Figure 2 Enlarged view of the position of the steel sleeve.

[0041] In the diagram: 1. Base plate; 2. Guide shaft; 3. Upper pressure plate; 4. Adapter; 5. Connecting rod; 6. Pressure head; 7. Contouring column; 8. Elastic plunger; 9. Support seat; 10. Floating core; 11. First spring; 12. Linear bearing; 13. Inner groove; 14. Nylon block; 15. Support sleeve; 16. Second spring; 17. Plunger housing; 18. Ball bearing; 19. Base; 20. Support block; 21. First photoelectric detection unit; 22. Second photoelectric detection unit; 23. Extension plate; 100. Steering knuckle; 200. Steel sleeve. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0043] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0044] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] Example

[0047] Reference Figure 1-3 A steel sleeve pressing device for automotive steering knuckles, comprising:

[0048] Base plate 1;

[0049] Two guide shafts 2 are fixed on the top sides of the base plate 1;

[0050] The upper pressure plate 3 has linear bearings 12 fixedly embedded at both ends, and the two linear bearings 12 are respectively slidably sleeved on the two guide shafts 2;

[0051] Adapter 4 is fixed to the top of the upper pressure plate 3 and is used to connect to the press;

[0052] Connecting rod 5 is fixed to the bottom of the upper pressure plate 3;

[0053] The pressure head 6 is fixed to the bottom of the connecting rod 5;

[0054] The contour post 7 is fixed at the bottom center of the pressure head 6, and the outer contour of the contour post 7 is adapted to the inner wall of the steel sleeve 200.

[0055] Several elastic plungers 8 are circumferentially embedded in the outer wall of the contoured column 7 near the bottom.

[0056] The support base 9 is fixed at the top center of the base plate 1 and located directly below the pressure head 6. The support base 9 has a sliding groove that extends downward from the top.

[0057] The floating core 10 is slidably installed in the sliding groove, and the top of the floating core 10 has an inner groove 13 that avoids the bottom of the contour column 7;

[0058] The first spring 11 is fixedly connected to the base plate 1 at its bottom and to the floating core 10 at its top. The floating core 10 extends out of the support seat 9 under the support of the first spring 11 when there is no pressure.

[0059] In use, this device achieves power coupling with an external press via adapter 4. In the initial state, the contour column 7 and the floating core 10 are separated. Supported by the first spring 11, the top of the floating core 10 extends out of the support seat 9. At this time, the steering knuckle 100 can be placed on the support seat 9, with the mounting hole passing through the floating core 10 to accurately position the steering knuckle 100. Then, the steel sleeve 200 is installed by fitting it onto the contour column 7 from bottom to top. The elastic plunger 8 deforms and makes room under the compression of the steel sleeve 200. After the steel sleeve 200 completely passes through the elastic plunger 8, the elastic plunger 8 resets to limit the steel sleeve 200, so that the steel sleeve 200 is stably locked on the contour column 7. The outer contour of the contour column 7 matches the inner wall of the steel sleeve 200, which can ensure the accurate positioning of the steel sleeve 200 and the stability of the pressing process.

[0060] After the steering knuckle 100 and steel sleeve 200 are installed in place, pressing can begin. Linear bearings 12 are fixedly embedded at both ends of the upper pressure plate 3 of this device. The two linear bearings 12 are slidably mounted on the two guide shafts 2, thus forming a rigid guide structure. When the external press moves the upper pressure plate 3 downwards via the adapter 4, the stability of the upper pressure plate 3's movement is ensured, thereby ensuring the stability of the press head 6's movement, effectively suppressing the offset of the press head 6, and ensuring the accuracy of the steel sleeve 200 pressing.

[0061] During the pressing process, the inner groove 13 at the top of the floating core 10 avoids the bottom of the contour column 7, and the top edge of the floating core 10 forms a supporting contact with the bottom of the steel sleeve 200. When the pressing head 6 presses down, the first spring 11 is compressed and deformed to generate a reverse supporting force, which supports the bottom of the steel sleeve 200 through the floating core 10. In this way, the downward force of the pressing head 6 and the reverse supporting force of the floating core 10 form a two-way constraint system, so that the steel sleeve 200 always maintains a horizontal posture during the pressing process, avoiding the tendency to tilt due to uneven force, and further ensuring the pressing accuracy of the steel sleeve 200.

[0062] Through the above design, this invention can ensure the accuracy of steel sleeve 200 press fitting, significantly improve product yield and production efficiency, and is particularly suitable for large-scale standardized production scenarios such as automotive parts.

[0063] As a preferred embodiment, the device also includes

[0064] Two nylon blocks 14 are fixed to the top of the base plate 1 and located on both sides of the support seat 9. The inner side of the top of the nylon block 14 has a supporting slope, which is adapted to the back of the steering knuckle 100. This can support the back of the steering knuckle 100 and prevent the steering knuckle 100 from rotating. The nylon blocks 14, the support seat 9, and the floating core 10 work together to ensure the accurate positioning and stable support of the steering knuckle 100.

[0065] As a preferred embodiment, the device also includes

[0066] Two support sleeves 15 are respectively fixed to the lower part of the two guide shafts 2;

[0067] Two second springs 16 are respectively sleeved on the upper part of the two guide shafts 2, with their bottoms fixedly connected to the support sleeve 15 and their tops fixedly connected to the linear bearing 12. Under the action of the second springs 16, the rebound movement of the upper pressure plate 3 can be supported.

[0068] As a preferred embodiment, the resilient plunger 8 includes

[0069] The plunger housing 17 is fixedly embedded in the outer wall of the contoured column 7 near the bottom, and the plunger has an inner cavity;

[0070] Ball bearing 18 is slidably mounted at the front end of the inner cavity;

[0071] A third spring (not shown) is located in the inner cavity, with one end fixedly connected to the ball 18 and the other end fixedly connected to the rear end of the inner cavity.

[0072] When no external force is applied, the front end of the ball bearing 18 extends out of the inner cavity. When the steel sleeve 200 is fitted onto the contour post 7 from bottom to top, the ball bearing 18 is compressed, causing the third spring to contract. The ball bearing 18 moves into the inner cavity. When the steel sleeve 200 has completely passed through the ball bearing 18, the ball bearing 18 returns to its original position under the elastic action of the third spring, with its front end extending out of the inner cavity to limit the steel sleeve 200, thus stably locking the steel sleeve 200 onto the contour post 7. Preferably, when the top of the steel sleeve 200 contacts the pressure head 6, the bottom of the steel sleeve 200 has just completely passed through the ball bearing 18.

[0073] As a preferred embodiment, the support base 9 includes

[0074] The base 19 is fixed to the top of the base plate 1;

[0075] The support block 20 is detachably fixed to the base 19 and is used to support the steering knuckle 100.

[0076] The top shape of the support block 20 can be designed according to the bottom shape of the steering knuckle 100 to facilitate support of the steering knuckle 100. The support block 20 can be detachably fixed on the base 19, so that the support block 20 can be quickly replaced according to different products, making it highly adaptable.

[0077] As a preferred embodiment, the device also includes

[0078] The first photoelectric detection unit 21 is fixed in front of the contour column 7 by the extension plate 23, and is used to detect whether the steel sleeve 200 is placed backwards.

[0079] Two second photoelectric detection units 22 are fixed on the base plate 1 and located on both sides of the support base 9, and are used to detect the left and right placement direction of the steering knuckle 100.

[0080] In this embodiment, the inside of the steel sleeve 200 is a tapered hole that is larger at the top and smaller at the bottom. If the steel sleeve 200 is placed backwards or incorrectly, it will not be able to completely pass through the elastic plunger 8 and will fall down. The first photoelectric detection unit 21 will not be able to detect the steel sleeve 200 in the correct position, and the press will not start. The two second photoelectric detection units 22 are used to detect the left and right placement direction of the steering knuckle 100. If one detects a signal, the other must detect no signal, thereby determining the accuracy of the left and right placement direction of the steering knuckle 100.

[0081] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pressing device for automotive steering knuckle steel sleeves, characterized in that: include Base plate; Two guide shafts are fixed on the top sides of the base plate; The upper pressure plate has linear bearings fixedly embedded at both ends, and the two linear bearings are slidably sleeved on the two guide shafts respectively; the adapter is fixed to the top of the upper pressure plate and is used to connect to the press. The connecting rod is fixed to the bottom of the upper pressure plate; The pressure head is fixed to the bottom of the connecting rod; A contoured column is fixed at the bottom center of the pressure head, and the outer contour of the contoured column is adapted to the inner wall of the steel sleeve. Several elastic plungers are circumferentially embedded in the outer wall of the contoured column near the bottom. A support base is fixed to the top center of the base plate, located directly below the pressure head, and the support base has a sliding groove that extends downward from the top. A floating core is slidably installed in the sliding groove, and the top of the floating core has an inner groove to avoid the bottom of the contour column; a first spring is fixedly connected to the bottom plate and to the floating core at the top, and the floating core extends out of the support seat at the top under the support of the first spring when there is no pressure.

2. The automotive steering knuckle steel sleeve pressing device according to claim 1, characterized in that: The device also includes two nylon blocks fixed to the top of the base plate, located on both sides of the support seat. The inner side of the top of the nylon block has a supporting slope, which is adapted to the back of the steering knuckle.

3. The automotive steering knuckle steel sleeve pressing device according to claim 1, characterized in that: The device also includes two support sleeves, which are respectively fixed to the lower part of the two guide shafts; Two second springs are respectively sleeved on the upper part of the two guide shafts, with their bottoms fixedly connected to the support sleeves and their tops fixedly connected to the linear bearings.

4. The automotive steering knuckle steel sleeve pressing device according to claim 1, characterized in that: The elastic plunger includes a plunger housing, which is fixedly embedded in the outer wall of the contoured column near the bottom, and the plunger has an inner cavity; A ball bearing is slidably mounted at the front end of the inner cavity; The third spring is located in the inner cavity, with one end fixedly connected to the ball and the other end fixedly connected to the rear end of the inner cavity.

5. The automotive steering knuckle steel sleeve pressing device according to claim 1, characterized in that: The support includes a base that is fixed to the top of the base plate; The support block is detachably fixed to the base and is used to support the steering knuckle.

6. The automotive steering knuckle steel sleeve pressing device according to claim 1, characterized in that: The device also includes a first photoelectric detection unit, which is fixed in front of the contour column by an extension plate, and is used to detect whether the steel sleeve is placed backwards. Two second photoelectric detection units are fixed on the base plate and located on both sides of the support base, used to detect the left and right placement direction of the steering knuckle.

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