Hammer head fixing device for drop hammer test of automobile steering knuckle

Abstract

The utility model discloses a hammerhead fixing device for an automobile steering knuckle drop hammer test, which relates to the technical field of automobile steering knuckle tests and comprises a base, the top of the base is connected with a top plate through a sliding rod and a support, and a first sliding plate and a second sliding plate are respectively slidably mounted on the sliding rod. A rotating shaft is rotatably mounted between mounting frames fixedly mounted on the front side and the rear side of the first sliding plate, worms are arranged at the two ends of the rotating shaft and are in meshed connection with worm wheels, the worm wheels are fixed to the top of a rotating rod, the rotating rod is rotatably mounted on the first sliding plate, a limiting plate is fixedly mounted at the bottom of the rotating rod, and an electromagnet is mounted at the bottom of the first sliding plate; a mechanical structure composed of the rotating shaft, the worm, the worm gear, the rotating rod, the limiting plate and the like is used for auxiliary fixing. Even if the electromagnet loses magnetic force due to power failure or power system failure, the limiting plate can still limit accidental falling of the impact head from the mechanical level, the double-guarantee effect is achieved, and the risk of accidental falling of the impact head is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive steering knuckle testing technology, specifically a hammer head fixing device for automotive steering knuckle drop hammer testing. Background Technology

[0002] The steering knuckle is one of the main components of a car steering axle. It enables the car to drive stably and transmit driving direction sensitively. The function of the steering knuckle is to bear the load of the front of the car, support and drive the front wheels to rotate around the kingpin to steer the car. When the car is in motion, it bears variable impact loads. Therefore, it is required to have high strength. So, the steering knuckle of the car must be strictly tested before it is put into use.

[0003] Chinese utility model patent application number 202321441330.5 provides a falling hammer impact testing device for automotive steering knuckles. When the impact head falls downwards, the impact plate guides the longitudinal movement of the impact head on two sliding rods, improving the accuracy of the impact head's impact on the steering knuckle and thus further improving the accuracy of the steering knuckle impact strength test. At the same time, the impact head can be fixed or released by the demagnetization or remagnetization operation of the electro-permanent magnet chuck, which is convenient and quick to operate and reduces the influence of external pulling force on the descent of the impact head, making it easier to measure impact test data.

[0004] However, during the use of the above equipment, it was found that the operation of the electro-permanent magnet chuck depends on the power supply. If a power outage or power system failure occurs during operation, the electro-permanent magnet chuck will lose its magnetic force, causing the impact head to fall off unexpectedly. This will not only affect the normal progress of the test, but also easily pose a safety threat to the equipment and personnel. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a hammer head fixing device for automotive steering knuckle drop hammer testing. This solves the problem mentioned in the background technology that if a power outage or power system failure occurs during operation, the electro-permanent magnet chuck will lose its magnetic force, causing the impact head to fall off unexpectedly. This not only affects the normal conduct of the test but also poses a safety threat to equipment and personnel.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hammer head fixing device for testing a drop hammer on an automotive steering knuckle, comprising a base, the top of which is connected to a top plate via a sliding rod and a bracket, a winding assembly mounted on the top plate, a positioning structure mounted on the base, a first sliding plate and a second sliding plate slidably mounted on the sliding rod, mounting brackets fixedly mounted on the front and rear sides of the first sliding plate, a rotating shaft rotatably mounted on the mounting bracket, the rotating shaft being connected to the output end of a motor, worm gears being provided at both ends of the rotating shaft, the worm gears meshing with worm wheels, the worm wheels being fixed to the top of the rotating shaft, the rotating shaft being rotatably mounted on the first sliding plate, a limit plate fixedly mounted on the bottom of the rotating shaft, an electromagnet mounted on the bottom of the first sliding plate, and the top of the first sliding plate being connected to a rope in the winding assembly via a fixing ring.

[0007] Preferably, the worms at both ends of the rotating shaft are symmetrical to each other, and the worm wheels meshing with the two worms are located on the same side of the rotating shaft.

[0008] Preferably, the top of the second slide plate is bolted to an adsorption plate, and the bottom of the second slide plate is equipped with a counterweight, the bottom of which is provided with an impact head.

[0009] Preferably, the cross-section of the adsorption iron plate is n-shaped, and a slot is formed between the adsorption iron plate and the second sliding plate.

[0010] Preferably, the distance from the bottom surface of the limiting plate to the bottom surface of the electromagnet is less than the distance from the top surface of the second sliding plate to the top surface of the adsorption plate, and the distance from the top surface of the limiting plate to the bottom surface of the electromagnet is greater than the distance from the top surface of the slot to the top surface of the adsorption plate.

[0011] Preferably, a scale is vertically provided on the outer side of each of the brackets.

[0012] This utility model provides a hammer head fixing device for a drop hammer test on an automotive steering knuckle. It has the following beneficial effects:

[0013] (1) This utility model uses a mechanical structure composed of a rotating shaft, worm gear, worm wheel, rotating rod and limiting plate for auxiliary fixation. Even if the electromagnet loses its magnetic force due to power failure or power system failure, the limiting plate can still mechanically limit the accidental detachment of the impact head, playing a dual protection role, greatly reducing the risk of accidental detachment of the impact head, reducing the safety threat to equipment and personnel, and ensuring that the test can be carried out more stably and safely.

[0014] (2) By setting a slot, the limiting plate can be inserted into the slot, which avoids affecting the electromagnet adsorbing the iron plate. At the same time, a scale is set on the bracket, which makes it easy for the operator to accurately observe the height of the slide plate, and thus facilitates the collection of measurement data. Attached Figure Description

[0015] Figure 1 This is a diagram showing the overall structure of this utility model;

[0016] Figure 2 This utility model Figure 1 A top-view structural diagram of the first skateboard in China;

[0017] Figure 3 This utility model Figure 1 A diagram showing the bottom structure of the first skateboard in China;

[0018] Figure 4 This utility model Figure 1 The structural diagram of the second skateboard in the middle.

[0019] In the diagram, 1 is the base; 11 is the slide rod; and 2 is the positioning structure.

[0020] 3. Stand; 31. Scale;

[0021] 4. Rewinding assembly;

[0022] 5. First slide plate; 51. Fixing ring; 52. Mounting bracket; 53. Rotating shaft; 54. Worm gear; 55. Worm wheel; 56. Motor; 57. Rotating rod; 58. Limiting plate; 59. Electromagnet;

[0023] 6. Second sliding plate; 61. Counterweight; 62. Impact head; 63. Adsorption plate; 64. Slot

[0024] 7. Top slab. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1: Please refer to Figures 1-4This utility model provides a hammer head fixing device for a car steering knuckle drop hammer test, including a base 1. The top of the base 1 is connected to a top plate 7 via a slide rod 11 and a bracket 3. A winding assembly 4 is installed on the top plate 7. A positioning structure 2 is installed on the base 1. A first slide plate 5 and a second slide plate 6 are slidably installed on the slide rod 11. Mounting brackets 52 are fixedly installed on both the front and rear sides of the first slide plate 5. A rotating shaft 53 is rotatably installed on the mounting bracket 52. The rotating shaft 53 is connected to the output end of a motor 56. Worms 54 are provided on both ends of the rotating shaft 53. Worms 54 are meshed with worm wheels 55. Worm wheels 55 are fixed on the top of a rotating rod 57. The rotating rod 57 is rotatably installed on the first slide plate 5. A limit plate 58 is fixedly installed on the bottom of the rotating rod 57. An electromagnet 59 is installed on the bottom of the first slide plate 5. The top of the first slide plate 5 is connected to a rope in the winding assembly 4 via a fixing ring 51.

[0027] The worms 54 at both ends of the shaft 53 are symmetrical to each other, and the worm wheels 55 meshing with the two worms 54 are located on the same side of the shaft 53.

[0028] The top of the second slide plate 6 is connected to an adsorption plate 63 by bolts, and the bottom of the second slide plate 6 is equipped with a counterweight 61, and the bottom of the counterweight 61 is provided with an impact head 62.

[0029] The cross-section of the adsorption plate 63 is n-shaped, and a slot 64 is formed between the adsorption plate 63 and the second sliding plate 6.

[0030] The distance from the bottom surface of the limiting plate 58 to the bottom surface of the electromagnet 59 is less than the distance from the top surface of the second sliding plate 6 to the top surface of the adsorption iron plate 63, and the distance from the top surface of the limiting plate 58 to the bottom surface of the electromagnet 59 is greater than the distance from the top surface of the slot 64 to the top surface of the adsorption iron plate 63.

[0031] Each bracket 3 has a scale 31 vertically installed on its outer side.

[0032] Specifically, the specific structures of the positioning component 2 and the winding component 4 have been described in detail in the referenced documents. The positioning component 2 is mainly used to accurately position the steering knuckle, which improves the accuracy of the steering knuckle test. The winding component 4 is mainly used to wind up and rotate the impact head 62 to rise to different heights for impact testing. It can test the impact of different magnitudes of impact force on the steering knuckle and improve the applicability of the equipment.

[0033] An electromagnet 59 is installed at the bottom of the first slide plate 5. When the electromagnet 59 is energized, it generates a magnetic force to attract the adsorption iron plate 63 on the top of the second slide plate 6. Since the adsorption iron plate 63 is connected to the second slide plate 6, and the second slide plate 6 has a counterweight 61 and an impact head 62 installed at the bottom, the impact head 62 is initially fixed by the adsorption force.

[0034] After the electromagnet 59 attracts the adsorption plate 63, the motor 56 drives the rotating shaft 53 to rotate, the worm gear 54 drives the worm wheel 55 to rotate, which in turn causes the rotating rod 57 to rotate, and the limiting plate 58 to rotate accordingly. Through reasonable size design, the distance from the bottom surface of the limiting plate 58 to the bottom surface of the electromagnet 59 is less than the distance from the top surface of the second sliding plate 6 to the top surface of the adsorption plate 63, and the distance from the top surface of the limiting plate 58 to the bottom surface of the electromagnet 59 is greater than the distance from the top surface of the slot 64 to the top surface of the adsorption plate 63. Thus, when the electromagnet 59 attracts the adsorption plate 63, the rotation of the limiting plate 58 can insert it into the slot 64 formed between the adsorption plate 63 and the second sliding plate 6, mechanically restricting the movement of the second sliding plate 6 and the impact head 62, achieving further limiting and fixing of the impact head 62.

[0035] The dual fixing method, combining electromagnet 59 adsorption with mechanical structure limiting, significantly improves the reliability of fixing the impact head 62 compared to a single fixing method. Even if the electromagnet 59 loses its magnetism for some reason, the mechanical limiting structure can still prevent the impact head 62 from accidentally falling off, effectively ensuring the safety and stability of the testing process and reducing the risk of accidental impact to equipment and personnel.

[0036] A scale 31 is provided on the outside of the bracket 3, which can intuitively display the height position of the slide plate, making it convenient for operators to accurately control the rising height of the impact head 62. It also facilitates observation of the movement of the slide plate during the test, which helps to identify problems and make adjustments in a timely manner.

[0037] Working principle: The positioning structure 2 installed on the base is used to accurately position the automotive steering knuckle to be tested, ensuring the steering knuckle is accurately positioned during the test. The winding assembly 4 on the top plate 7 is used for unwinding, causing the first slide plate 5 to descend. When the first slide plate 5 descends to the appropriate position, the electromagnet 59 at the bottom of the first slide plate 5 is energized. The electromagnet 59 generates magnetic force to attract the adsorption iron plate 63 at the top of the second slide plate 6, achieving initial fixation of the impact head 62. Then, the motor 56 starts, driving the rotating shaft 53 to rotate. The worm gears 54 at both ends of the rotating shaft 53 drive the meshing worm wheels 55 to rotate, thereby causing the rotating rod 57 to rotate. The limiting plate 58 at the bottom of the rotating rod 57 rotates accordingly and inserts into the slot 64 formed between the adsorption iron plate 63 and the second slide plate 6, further restricting the movement of the second slide plate 6 and the impact head 62 from a mechanical perspective, completing the reliable fixation of the impact head 62.

[0038] According to the test requirements, the winding assembly 4 performs a winding action, pulling the first slide plate 5 upward via a rope. Since the first slide plate 5 and the second slide plate 6 are reliably fixed together, the second slide plate 6, along with the counterweight 61 and impact head 62 installed at its bottom, also rise accordingly. The operator can visually observe the height of the slide plate's ascent through the scale 31 on the outside of the bracket 3, and accurately control the impact head 62 to rise to the predetermined test height.

[0039] After the impact head 62 rises to the predetermined height, the motor 56 is reversed to make the limiting plate 58 rotate out of the slot 64, releasing the mechanical limit. Then, the electromagnet 59 is demagnetized, releasing the attraction force on the adsorption plate 63. At this time, the impact head 62, the counterweight 61, and the second slide plate 6 slide down along the slide rod 11 under the action of gravity. The impact head 62 strikes the positioned steering knuckle, completing one drop hammer test.

[0040] After the test is completed, the winding assembly 4 performs an unwinding operation, causing the first slide plate 5 to descend to the surface of the adsorption iron plate 63. The electromagnet 59 is energized again to adsorb the adsorption iron plate 63. Then, the motor 56 rotates forward, causing the limit plate 58 to rotate and insert into the slot 64, re-fixing the impact head 62. After that, the winding assembly 4 winds up and pulls the impact head 62 up to reset, preparing for the next test.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hammer head fixing device for a drop hammer test of an automobile steering knuckle, comprising a base (1), the top of the base (1) being connected to a top plate (7) via a slide rod (11) and a bracket (3), a winding assembly (4) being mounted on the top plate (7), and a positioning structure (2) being mounted on the base (1), characterized in that: The slide bar (11) is slidably mounted with a first slide plate (5) and a second slide plate (6). The first slide plate (5) is fixedly mounted with mounting brackets (52) on both the front and rear sides. The mounting brackets (52) are rotatably mounted with a rotating shaft (53). The rotating shaft (53) is connected to the output end of the motor (56). The two ends of the rotating shaft (53) are provided with worm gears (54). The worm gears (54) are meshed with worm wheels (55). The worm wheels (55) are fixed to the top of the rotating rod (57). The rotating rod (57) is rotatably mounted on the first slide plate (5). The bottom of the rotating rod (57) is fixedly mounted with a limit plate (58). The bottom of the first slide plate (5) is mounted with an electromagnet (59). The top of the first slide plate (5) is connected to the rope in the winding assembly (4) through a fixing ring (51).

2. The hammer head fixing device for drop test of automobile steering knuckle according to claim 1, characterized in that: The worms (54) at both ends of the shaft (53) are symmetrical to each other, and the worm wheels (55) meshing between the two worms (54) are located on the same side of the shaft (53).

3. The hammer head fixing device for drop test of automobile steering knuckle according to claim 1, characterized in that: The top of the second slide plate (6) is connected with an adsorption plate (63) by bolts, and a counterweight (61) is installed at the bottom of the second slide plate (6). An impact head (62) is provided at the bottom of the counterweight (61).

4. The hammer head fixing device for drop test of automobile steering knuckle according to claim 3, characterized in that: The adsorption plate (63) has an n-shaped cross section, and a slot (64) is formed between the adsorption plate (63) and the second sliding plate (6).

5. The hammer head fixing device for drop test of automobile steering knuckle according to claim 4, characterized in that: The distance from the bottom surface of the limiting plate (58) to the bottom surface of the electromagnet (59) is less than the distance from the top surface of the second sliding plate (6) to the top surface of the adsorption iron plate (63), and the distance from the top surface of the limiting plate (58) to the bottom surface of the electromagnet (59) is greater than the distance from the top surface of the slot (64) to the top surface of the adsorption iron plate (63).

6. The hammer head fixing device for drop test of an automobile steering knuckle according to claim 1, characterized in that: Each of the brackets (3) has a scale (31) vertically mounted on its outer side.

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