Load amplifying device

Abstract

The utility model discloses a load amplifying device, and relates to the technical field of steering knuckle testing devices, one side of a vertical plate is provided with a U-shaped seat, the middle part of the U-shaped seat is provided with a pin shaft, the middle part of a lever seat is connected with a cylindrical roller bearing arranged in the U-shaped seat through the pin shaft, two ends of the lever seat are respectively provided with a far-end connecting port and a near-end connecting port, and the far-end connecting port is connected with the near-end connecting port. A first nut is installed at the far-end connector at one end through a first linear joint bearing, a first connecting rod is installed at one end of the first nut, and a first connecting rod connector is arranged at one end of the first connecting rod; a second nut is installed on the near-end connector at the other end through a second linear joint bearing, a first load sensor is installed on the second nut through a second connecting rod, a third connecting rod is installed at one end of the first load sensor, and a second connecting rod connector is arranged at one end of the third connecting rod; according to the utility model, when a steering knuckle test is carried out, the existing hydraulic actuator is fully utilized to complete a test with a load greater than a rated load of the hydraulic actuator, so that the test cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of steering knuckle testing devices, in particular to a load amplification device. Background Art

[0002] The automobile steering knuckle is one of the main parts in the automobile suspension system. It is connected to the automobile's connecting rods, bearings, wheels and brake assemblies. It has the functions of bearing the front and rear loads of the automobile, supporting and driving the wheel hub to rotate, and realizing flexible steering and normal driving of the automobile. The reliability of the steering knuckle directly affects the normal driving of the car and the life safety of the passengers. The steering knuckle will be subjected to variable impact and fatigue loads when the car is driving. Therefore, there are higher requirements for the strength, fatigue, stiffness and various mechanical properties of the steering knuckle. Therefore, during the product development cycle, it is very important to verify whether the fatigue life and strength of the product can meet the needs of various working conditions.

[0003] The test verification of steering knuckles by various OEMs mainly includes fatigue test, static strength load test and impact test. Fatigue test and static strength load test need to be carried out on the test platform through hydraulic actuator. There are generally 10 to 20 hydraulic actuators on the traditional test platform, with specifications of 15KN, 25KN, and 50KN. Some test platforms are equipped with a 100KN hydraulic actuator. However, due to the large number of test items, the application of 15KN, 25KN, and 50KN hydraulic actuators often fails to meet the test load requirements. If a large number of 100KN hydraulic actuators are purchased, it will result in huge costs. Utility Model Content

[0004] In view of the above technical problems, the utility model proposes a load amplification device, including a lever seat and a base plate, the base plate is welded with a vertical plate, a U-shaped seat is installed on one side of the vertical plate, both ends of the U-shaped seat are equipped with cylindrical roller bearings, a pin is installed in the middle of the U-shaped seat, the pin is connected to the cylindrical roller bearing, the middle of the lever seat is connected to the cylindrical roller bearing built into the U-shaped seat through the pin, both ends of the lever seat are provided with a distal connection port and a proximal connection port, the distal connection port and the proximal connection port of the same end are spaced apart, and the distal connection port at one end of the lever seat is connected through a straight joint A nut is installed on bearing one, and a connecting rod is installed on the end of the nut one away from the distal connection port, and a connecting rod interface is provided on the end of the connecting rod one away from the nut one; a nut is installed on the proximal connection port at the other end of the lever seat through a slotted joint bearing two, and a load sensor is installed on the nut two through a connecting rod two, and a connecting rod three is installed on the end of the load sensor one away from the connecting rod two, and a connecting rod interface is provided on the end of the connecting rod three away from the load sensor one; a test assembly is externally connected to the connecting rod three through the connecting rod interface two, and a driving assembly is externally connected to the connecting rod one through the connecting rod interface one.

[0005] Furthermore, the distance from the distal connection port to the center of the lever seat is greater than the distance from the proximal connection port to the center of the lever seat at the same end, and a rotation space is provided between the U-shaped seat and the lever seat to prevent interference during rotation.

[0006] Furthermore, bearing holes for installing cylindrical roller bearings are provided at both ends of the U-shaped seat; stepped platforms are provided at the ends of the bearing holes on the U-shaped seat so that the ends of the bearing holes on the U-shaped seat support the outer ring of the cylindrical roller bearing; bosses for supporting the inner ring of the cylindrical roller bearing are provided on both sides of the middle part of the lever seat.

[0007] Furthermore, the vertical plate is provided with a fixing plate, a fastener, and an elongated hole for adjusting the position of the U-shaped seat, two elongated holes are arranged at intervals, and the U-shaped seat is detachably mounted on the elongated hole through the fixing plate and the fastener.

[0008] Furthermore, the lower end of the pin shaft is connected to two nuts three by threads, and an avoidance gap is provided between the upper surface of the nut three close to the U-shaped seat and the U-shaped seat to prevent interference during rotation.

[0009] Furthermore, reinforcing ribs for support are welded on both sides of a side of the vertical plate away from the lever seat, and the reinforcing ribs are welded on the base plate. The base plate is fixedly mounted to an external test platform through a pressure plate, and the test assembly and the drive assembly are respectively arranged on both sides of the base plate. The test assembly and the drive assembly are fixedly mounted on the test platform, and lifting holes are arranged on the reinforcing ribs.

[0010] Furthermore, the test assembly includes a loading block, a test sample, a connecting flange and a bent plate, the bent plate is fixedly mounted on the test platform through a pressure plate, the test sample is mounted on the bent plate through a connected connecting flange, one end of the loading block is hinged to the test part of the test sample through a universal ball joint, the other end of the loading block is connected to the connecting rod interface 2 on the connecting rod 3 through a thread, and the universal ball joint at the loading block and the two slotted spherical bearings form a two-force rod structure.

[0011] Furthermore, the drive assembly includes load sensor 2, connecting rod 4, nut 4, slotted joint bearing 3, guide, connecting seat and hydraulic actuator, the connecting seat is fixedly mounted on the test platform through a pressure plate, the hydraulic actuator is fixedly mounted on the connecting seat, the guide is connected to the hydraulic actuator through a fastener, the guide is used to protect the hydraulic actuator, the slotted joint bearing 3 is mounted on the guide through a fastener, the connecting rod 4 is connected to the slotted joint bearing 3 through a nut 4, the load sensor 2 is connected to the connecting rod 4 through a fastener, the connecting rod 1 is connected to the load sensor 2 through a connecting rod interface 1, the slotted joint bearing 1 and the slotted joint bearing 3 form a two-force rod structure, and the load sensor 2 is externally connected to a display for displaying the load value and a collector for collecting the load value.

[0012] Furthermore, a load display and a collector are provided on the load sensor for displaying load values ​​and collecting load values.

[0013] Furthermore, the load sensor 1 is connected to a display device for displaying load values ​​externally connected to the load sensor 2 to display the load values, and the load sensor 1 is connected to a collector for collecting load values ​​externally connected to the load sensor 2 to collect the load values.

[0014] Compared with the prior art, the utility model has the following beneficial effects: (1) during the steering knuckle test, the utility model can make full use of the existing 15KN, 25KN, and 50KN hydraulic actuators to complete the test with a load greater than the rated load of the hydraulic actuator, thereby greatly reducing the test cost; (2) the utility model can ensure that the load sensor 1 always maintains the axial load by forming a two-force rod structure through the universal ball joint at the loading block and the one-shaped joint bearing 2, thereby reducing the risk of damage and ensuring the force freedom of the loading part of the test sample; the one-shaped joint bearing 1 and the one-shaped joint bearing 3 form a two-force rod structure, thereby ensuring that the load sensor 2 always bears the axial load, thereby reducing the risk of damage; (3) since the distance from the distal connection port to the center of the lever seat is greater than the distance from the proximal connection port to the center of the lever seat at the same end, the distance from the distal connection port to the pin shaft is greater than the distance from the proximal connection port to the pin shaft, thereby enabling the output force of the hydraulic actuator to amplify the force transmitted to the load sensor 1 through the lever action. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the load amplification device of the utility model.

[0016] Figure 2 The structure of the load amplification device of the utility model is schematically shown. Figure 1 .

[0017] Figure 3The structure of the load amplification device of the utility model is schematically shown. Figure 2 .

[0018] Figure 4 It is a partial cross-sectional view of the load amplification device of the utility model.

[0019] Figure 5 It is a schematic diagram of the actual application structure of the load amplification device of the utility model.

[0020] Figure numbers: 1-vertical plate; 2-U-shaped seat; 3-pin shaft; 4-lever seat; 5-distal end connection port; 6-slotted spherical bearing 1; 7-nut 1; 8-connecting rod 1; 9-connecting rod interface 1; 10-proximal end connection port; 11-slotted spherical bearing 2; 12-nut 2; 13-connecting rod 2; 14-load sensor 1; 15-connecting rod 3; 16-cylindrical roller bearing; 17-nut 3; 18-fixed plate; 19- Fastener; 20-boss; 21-connecting rod interface 2; 22-long hole; 23-reinforcement rib; 24-base plate; 25-step platform; 26-test platform; 27-loading block; 28-test specimen; 29-connecting flange; 30-bending plate; 31-pressure plate; 32-load sensor 2; 33-connecting rod 4; 34-nut 4; 35-slotted spherical bearing 3; 36-guide; 37-connecting seat; 38-hydraulic actuator. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0022] Example: Figure 1-Figure 5A load amplification device shown in the figure comprises a lever seat 4 and a base plate 24, a vertical plate 1 is welded on the base plate 24, a U-shaped seat 2 is installed on one side of the vertical plate 1, cylindrical roller bearings 16 are built-in at both ends of the U-shaped seat 2, a pin shaft 3 is installed in the middle of the U-shaped seat 2, the pin shaft 3 is connected to the cylindrical roller bearing 16, the pin shaft 3 and the cylindrical roller bearing 16 are a copper hammer-driven interference fit, and the pin shaft 3 and the U-shaped seat 2 are a clearance fit; the middle part of the lever seat 4 is connected to the cylindrical roller bearing 16 built-in the U-shaped seat 2 through the pin shaft 3, and the two ends of the lever seat 4 are provided with a distal connection port 5 and a proximal connection port 10 to ensure that the lever seat 4 can be used by adjusting the installation position in case one connection port is damaged; the distal connection port 5 and the proximal connection port 10 at the same end are distributed at intervals, A nut 7 is installed at the distal connection port 5 at one end of the lever seat 4 through a slotted joint bearing 6, a connecting rod 8 is installed at the end of the nut 7 away from the distal connection port 5, and a connecting rod interface 9 is provided at the end of the connecting rod 8 away from the nut 7; a nut 2 12 is installed at the proximal connection port 10 at the other end of the lever seat 4 through a slotted joint bearing 2 11, a load sensor 14 is installed at the nut 2 12 through a connecting rod 2 13, a connecting rod 3 15 is installed at the end of the load sensor 14 away from the connecting rod 2 13, and a connecting rod interface 21 is provided at the end of the connecting rod 3 15 away from the load sensor 14; the connecting rod 3 15 is externally connected to a test assembly through the connecting rod interface 21, and the connecting rod 8 is externally connected to a drive assembly through the connecting rod interface 9.

[0023] The distance from the distal connection port 5 to the center of the lever seat 4 is greater than the distance from the proximal connection port 10 at the same end to the center of the lever seat 4. A rotating space is provided between the U-shaped seat 2 and the lever seat 4 to prevent interference during rotation; both ends of the U-shaped seat 2 are provided with bearing holes for installing cylindrical roller bearings 16, and the cylindrical roller bearings 16 and the bearing holes of the U-shaped seat 2 are of a copper hammer-punched interference fit; the ends of the bearing holes on the U-shaped seat 2 are provided with stepped platforms 25, so that the ends of the bearing holes on the U-shaped seat 2 support the outer ring of the cylindrical roller bearing 16; both sides of the middle of the lever seat 4 are provided with bosses 20 for supporting the inner ring of the cylindrical roller bearing 16; the vertical plate 1 is provided with a fixing plate 18, a fastener 19, and a long hole 22 for adjusting the position of the U-shaped seat 2, and two long holes 22 are provided at intervals, and the U-shaped The seat 2 is detachably mounted on the long hole 22; the lower end of the pin shaft 3 is connected with two nuts three 17 by threads, and an avoidance gap is provided between the upper surface of the nut three 17 close to the U-shaped seat 2 and the U-shaped seat 2 to prevent interference during rotation, thereby ensuring that when the nut three 17 is screwed into the root of the pin shaft 3 by threaded cooperation, the nut three 17 will not contact the corresponding surface of the U-shaped seat 2, and when the two nuts three 17 are cooperated and locked, the pin shaft 3 and the U-shaped seat 2 can still rotate freely; both sides of the side of the vertical plate 1 away from the lever seat 4 are welded with reinforcing ribs 23 for support, and the reinforcing ribs 23 are welded to the bottom plate 24, and the bottom plate 24 is fixedly mounted to the external test platform 26 by a pressure plate 31, and the test assembly and the drive assembly are respectively arranged on both sides of the bottom plate 24, and the test assembly and the drive assembly are fixedly mounted on the test platform 26.

[0024] The test assembly includes a loading block 27, a test sample 28, a connecting flange 29 and a bent plate 30. The bent plate 30 is fixedly mounted on the test platform 26 through a pressure plate 31. The test sample 28 is mounted on the bent plate 30 through the connected connecting flange 29. One end of the loading block 27 is connected to the test portion of the test sample 28 through a universal ball joint. The other end of the loading block 27 is connected to a connecting rod interface 21 on a connecting rod 3 15 through a thread. The universal ball joint at the loading block 27 and the slotted spherical bearing 2 11 form a two-force rod structure. A lifting hole is provided on the reinforcing rib 23.

[0025] The driving assembly includes a load sensor 2 32, a connecting rod 4 33, a nut 4 34, a flat joint bearing 35, a guide 36, a connecting seat 37 and a hydraulic actuator 38. The connecting seat 37 is fixedly mounted on the test platform 26 through a pressure plate 31, the hydraulic actuator 38 is fixedly mounted on the connecting seat 37, the guide 36 is connected to the hydraulic actuator 38 through a fastener, and the guide 36 is used to protect the hydraulic actuator 38, the flat joint bearing 35 is mounted on the guide 36 through a fastener, the connecting rod 4 33 is connected to the flat joint bearing 35 through a nut 4 34, the load sensor 2 32 is connected to the connecting rod 4 33 through a fastener, the connecting rod 1 8 is connected to the load sensor 2 32 through a connecting rod interface 1 9, the flat joint bearing 1 6 and the flat joint bearing 3 35 form a two-force rod structure, and the load sensor 2 32 is externally connected to a display for displaying load values ​​and a collector for collecting load values.

[0026] In one embodiment, the load sensor 14 is provided with a load display and a collector for displaying load values ​​and collecting load values.

[0027] In another embodiment, the load sensor 14 is connected to a display device for displaying load values ​​externally connected to the load sensor 2 32 to display the load values, and the load sensor 14 is connected to a collector for collecting load values ​​externally connected to the load sensor 2 32 to collect the load values.

[0028] The test sample 28 is installed on the test platform 26 through the connecting flange 29, the bending plate 30, and the pressure plate 31; the loading block 27 is connected to the part of the test sample 28 that needs to be tested. The connection part between the loading block 27 and the test sample 28 is a universal ball joint. The universal ball joint at the loading block 27 and the one-shaped joint bearing 11 together form a two-force rod structure, which can ensure that the load sensor 14 always maintains the axial load without damage, and at the same time ensure the force freedom of the loading part of the test sample 28. The loading block 27 is connected to the connecting rod interface 21 on the connecting rod 3 15 through a threaded connection. ; After adjusting the connecting rod three 15 in the horizontal and vertical directions, ensure that the lever 4 and the connecting rod three 15 are vertical, and use the pressure plate 31 to fix the base plate 24 on the test platform 26; connect the connecting rod interface one 9 on the connecting rod one 8 and the load sensor two 32; the load sensor two 32 is connected to the connecting rod four 33 through a fastener, and the connecting rod four 33 is connected to the slotted joint bearing three 35 through a threaded connection and locked with a nut four 34; the slotted joint bearing one 6 and the slotted joint bearing three 35 form a two-force rod structure to ensure that the load sensor two 32 always bears the axial load and is not damaged.

[0029] The working principle of the utility model is as follows: the flat joint bearing 35 is connected to the guide 36 through the fastener, and the guide 36 is connected to the hydraulic actuator 38 fixed on the connecting seat 37 through the fastener. The guide 36 has a protective effect on the hydraulic actuator 38, which can ensure that the hydraulic actuator 38 does not bear too large radial load; because the distance from the distal connection port 5 to the center of the lever seat 4 is greater than the distance from the proximal connection port 10 at the same end to the center of the lever seat 4, the distance from the distal connection port 5 to the pin 3 is greater than the distance from the proximal connection port 10 to the pin 3, which is a 2-fold relationship in this embodiment, so that the output force of the hydraulic actuator 38 is transmitted to the load sensor 14 through the lever action, and the force will be amplified by 2 times. Load sensor 2 32 is a load sensor provided by the hydraulic actuator 38. The reason for setting load sensor 14 is that there will be a certain resistance in the loading process to consume the output force of the hydraulic actuator 38, which will cause the load value transmitted to the test sample 28 to be inaccurate; load sensor 14 can be connected to a load display and a collector separately to display the load value and collect the load value; it can also be connected to the load display connected to load sensor 2 32 to display the load value, and connected to the collector connected to load sensor 2 32 to collect the load value; the displacement of the loading block 27 on the test sample 28 is obtained by dividing the displacement sensor value on the hydraulic actuator 38 by 2.

[0030] The following are examples: Figure 5 As shown, assuming that during the test, the test sample 28 requires a thrust of 60 kN at the loading block 27, since the distance from the distal connection port 5 to the pin 3 is twice the distance from the proximal connection port 10 to the pin 3, a 2-fold lever effect will be generated, and the hydraulic actuator 38 only needs to output a negative 30 kN pulling force. Since the test sample 28 and the hydraulic actuator 38 are on both sides of the lever 4, the output force direction of the hydraulic actuator 38 is opposite to the force direction required by the loading block 27 on the test sample 28. During the loading process of the hydraulic actuator 38 from 0 kN to negative 30 kN, the force on the loading block 27 is always twice the output force of the hydraulic actuator 38, that is, 0 kN to 60 kN. When the loading block 27 is loaded to 60 kN, the load value on the load sensor 1 14 is positive 60 kN, and the load value on the load sensor 2 32 is negative 30 kN.

Claims

1. A load amplification device, characterized in that: The invention comprises a lever seat (4) and a bottom plate (24), wherein a vertical plate (1) is welded to the bottom plate (24), a U-shaped seat (2) is installed on one side of the vertical plate (1), both ends of the U-shaped seat (2) are equipped with cylindrical roller bearings (16), a pin shaft (3) is installed in the middle of the U-shaped seat (2), the pin shaft (3) is connected to the cylindrical roller bearing (16), the middle of the lever seat (4) is connected to the cylindrical roller bearing (16) built in the U-shaped seat (2) through the pin shaft (3), both ends of the lever seat (4) are provided with a distal connection port (5) and a proximal connection port (10), the distal connection port (5) and the proximal connection port (10) at the same end are spaced apart, the distal connection port (5) at one end of the lever seat (4) is equipped with a nut (7) through a flat joint bearing (6), the nut (7) is installed in the distal connection port (5) of the lever seat (4), and the nut (7) is installed in the distal connection port (5) of the lever seat (4) through a flat joint bearing (6). A connecting rod 1 (8) is installed at one end of the nut 1 (7) away from the distal connection port (5), and a connecting rod interface 1 (9) is provided at one end of the connecting rod 1 (8) away from the nut 1 (7); a nut 2 (12) is installed at the proximal connection port (10) at the other end of the lever seat (4) through a slotted joint bearing 2 (11), and a load sensor 1 (14) is installed at the nut 2 (12) through a connecting rod 2 (13); a connecting rod 3 (15) is installed at one end of the load sensor 1 (14) away from the connecting rod 2 (13), and a connecting rod interface 2 (21) is provided at one end of the connecting rod 3 (15) away from the load sensor 1 (14); a test assembly is externally connected to the connecting rod interface 2 (21), and a drive assembly is externally connected to the connecting rod 1 (8) through the connecting rod interface 1 (9).

2. A load amplification device as claimed in claim 1, characterized in that: The distance from the distal connection port (5) to the center of the lever seat (4) is greater than the distance from the proximal connection port (10) at the same end to the center of the lever seat (4), and a rotation space is provided between the U-shaped seat (2) and the lever seat (4) to prevent interference during rotation.

3. A load amplification device as claimed in claim 2, characterized in that: Both ends of the U-shaped seat (2) are provided with bearing holes for mounting a cylindrical roller bearing (16); the ends of the bearing holes on the U-shaped seat (2) are provided with stepped platforms (25) so that the ends of the bearing holes on the U-shaped seat (2) support the outer ring of the cylindrical roller bearing (16); and both sides of the middle of the lever seat (4) are provided with bosses (20) for supporting the inner ring of the cylindrical roller bearing (16).

4. A load amplification device as claimed in claim 3, characterized in that: The vertical plate (1) is provided with a fixing plate (18), a fastener (19), and an elongated hole (22) for adjusting the position of the U-shaped seat (2); two elongated holes (22) are provided at intervals, and the U-shaped seat (2) is detachably mounted on the elongated hole (22) by means of the fixing plate (18) and the fastener (19).

5. A load amplification device as claimed in claim 4, characterized in that: The lower end of the pin shaft (3) is threadedly connected to two nuts three (17), and an avoidance gap is provided between the upper surface of the nut three (17) close to the U-shaped seat (2) and the U-shaped seat (2) to prevent interference during rotation.

6. A load amplification device as claimed in claim 5, characterized in that: Reinforcing ribs (23) for support are welded on both sides of a side of the vertical plate (1) away from the lever seat (4); the reinforcing ribs (23) are welded to the bottom plate (24); the bottom plate (24) is fixedly mounted to an external test platform (26) via a pressure plate (31); the test assembly and the drive assembly are respectively arranged on both sides of the bottom plate (24); the test assembly and the drive assembly are fixedly mounted on the test platform (26); and the reinforcing ribs (23) are provided with lifting holes.

7. A load amplification device as claimed in claim 6, characterized in that: The test assembly comprises a loading block (27), a test specimen (28), a connecting flange (29) and a bent plate (30); the bent plate (30) is fixedly mounted on the test platform (26) via a pressure plate (31); the test specimen (28) is mounted on the bent plate (30) via a connected connecting flange (29); one end of the loading block (27) is connected to a test portion of the test specimen (28) via a universal ball joint; the other end of the loading block (27) is connected to a connecting rod interface 2 (21) on a connecting rod 3 (15) via a thread; the universal ball joint at the loading block (27) and a two-force rod structure are formed with a two-slotted spherical bearing 2 (11).

8. A load amplification device as claimed in claim 7, characterized in that: The driving assembly comprises a second load sensor (32), a fourth connecting rod (33), a fourth nut (34), a third flat joint bearing (35), a guide (36), a connecting seat (37) and a hydraulic actuator (38). The connecting seat (37) is fixedly mounted on the test platform (26) via a pressure plate (31). The hydraulic actuator (38) is fixedly mounted on the connecting seat (37). The guide (36) is connected to the hydraulic actuator (38) via a fastener. The guide (36) is used to protect the hydraulic actuator (38). The bearing three (35) is installed on the guide (36) through fasteners, the connecting rod four (33) is connected to the flat joint bearing three (35) through a nut four (34), the load sensor two (32) is connected to the connecting rod four (33) through a fastener, the connecting rod one (8) is connected to the load sensor two (32) through a connecting rod interface one (9), the flat joint bearing one (6) and the flat joint bearing three (35) form a two-force rod structure, and the load sensor two (32) is externally connected to a display for displaying load values ​​and a collector for collecting load values.

9. A load amplification device as claimed in claim 8, characterized in that: The load sensor 1 (14) is provided with a load display and a collector for displaying load values ​​and collecting load values.

10. A load amplification device as claimed in claim 8, characterized in that: The load sensor 1 (14) is connected to a display device for displaying load values ​​externally connected to the load sensor 2 (32) to display the load values, and the load sensor 1 (14) is connected to a collector for collecting load values ​​externally connected to the load sensor 2 (32) to collect the load values.

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