Multi-working-condition durable rack for lower control arm

Abstract

The utility model discloses a multi-working-condition durable rack for a lower control arm, which is characterized in that one side of the lower control arm is hinged with a lower control arm fixing device, the other side of the lower control arm is hinged with a loading part, the loading part is arranged on a sliding table, and the sliding table has two movement directions; the loading part is connected with a plurality of power devices, and the power devices connected with the loading part work to drive the sliding table and the lower control arm to generate displacement in the X direction or the Y direction; the lower control arm fixing device is connected with a power device, and the power device connected with the lower control arm fixing device works to drive the lower control arm to twist; according to the utility model, loading forces in multiple directions can be applied to the lower control arm at the same time, so that the test bench is more in line with the stress condition of the lower control arm in a real vehicle state, by controlling the first electric cylinder, the second electric cylinder and the motor to work, the multi-working-condition test of the lower control arm can be realized, the working condition can be replaced in an unattended manner, and the automation degree is high.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts testing tooling technology, specifically relating to a multi-condition durability test bench for lower control arms. Background Technology

[0002] The lower control arm, also known as the lower control arm or lower swing arm, is an important component of the suspension system. Located at the front and rear axles of the vehicle chassis, it supports the wheels and transmits forces from the shock absorbers. One end of the lower control arm is connected to the steering knuckle via a ball joint, and the other end is connected to the subframe via a rubber bushing. The main function of the lower control arm is to maintain vehicle stability and handling while reducing vibration and noise during driving.

[0003] Currently, in traditional lower control arm testing, the lower control arm test can only perform durability tests in one or two directions simultaneously, and changing the test direction requires manual assistance. This results in low testing efficiency, numerous restrictions on loading conditions, and the inability to achieve unattended reversing. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-condition durability test bench for the lower control arm, which solves the problem of not being able to apply loading forces in multiple directions to the lower control arm at the same time, and also solves the problem of changing test conditions even when unattended.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A multi-condition durability test bench for a lower control arm, wherein one side of the lower control arm is hinged to a lower control arm fixing device, and the other side of the lower control arm is hinged to a loading part, the loading part is mounted on a slide table, the slide table having two directions of movement; the loading part is connected to multiple power devices, the power devices connected to the loading part drive the slide table and the lower control arm to produce displacement in the X or Y direction; the lower control arm fixing device is connected to the power devices, the power devices connected to the lower control arm fixing device drive the lower control arm to twist.

[0007] Furthermore, the lower control arm fixing device is provided with a bushing mounting seat, a bushing is press-fitted onto the lower control arm, and the bushing on the lower control arm is hinged to the bushing mounting seat on the lower control arm fixing device. The connection between the lower control arm and the lower control arm fixing device is used to simulate the connection between the lower control arm and the subframe.

[0008] Furthermore, the loading part is internally connected to a ball joint. The loading part is a cavity with one open side. The side of the cavity facing the lower control arm is open. The top surface of the loading part serves as a ball joint fixing seat. The ball joint includes a spherical head and a rod-shaped handle. The spherical head is connected to the bottom side of the top surface of the loading part, and the rod-shaped handle is hinged to the mounting hole on the lower control arm by riveting.

[0009] Furthermore, a square cavity is connected to the bottom side of the top surface of the loading part. The square cavity is used to accommodate the spherical head of the ball joint. The outer surface of the spherical head is clearance-fitted with the inner surface of the square cavity. The top surface of the square cavity is connected to the bottom side of the top surface of the loading part. The bottom surface of the square cavity has a through hole. One end of the ball joint rod-shaped shank extends out of the through hole. The end of the rod-shaped shank extending out of the through hole is hinged to the mounting hole on the lower control arm by riveting. The connection between the lower control arm and the loading part is used to simulate the connection between the lower control arm and the vehicle steering knuckle.

[0010] Furthermore, the loading part is disposed on the slide table, which includes an upper horizontal plate, a middle horizontal plate and a bottom plate. The bottom of the loading part is installed on the top surface of the upper horizontal plate. Upper sliders are symmetrically arranged at the front and rear ends of the bottom of the upper horizontal plate. Two long strip-shaped transverse slide rails are symmetrically arranged at the front and rear ends of the upper surface of the middle horizontal plate. The transverse slide rails are arranged along the X direction, and the upper horizontal plate can slide back and forth along the transverse slide rails in the X direction.

[0011] Furthermore, the upper slider at the front end of the bottom surface of the upper horizontal plate is fitted onto the transverse slide rail at the front end of the middle horizontal plate, and the upper slider at the front end of the bottom surface of the upper horizontal plate and the transverse slide rail at the front end of the middle horizontal plate are in clearance fit. The upper slider at the rear end of the bottom surface of the upper horizontal plate is fitted onto the transverse slide rail at the rear end of the middle horizontal plate, and the upper slider at the rear end of the bottom surface of the upper horizontal plate and the transverse slide rail at the rear end of the middle horizontal plate are in clearance fit.

[0012] Furthermore, the bottom surface of the horizontal plate is symmetrically provided with middle-layer sliders on both the left and right sides, and the top surface of the base plate is symmetrically provided with two long strip-shaped longitudinal slide rails on both the left and right sides. The longitudinal slide rails are arranged along the Y direction. The middle-layer slider on the left side of the bottom surface of the horizontal plate is fitted onto the longitudinal slide rail on the left side of the base plate, and the middle-layer slider on the left side of the bottom surface of the horizontal plate is in clearance fit with the longitudinal slide rail on the left side of the base plate. The middle-layer slider on the right side of the bottom surface of the horizontal plate is fitted onto the longitudinal slide rail on the right side of the base plate, and the middle-layer slider on the right side of the bottom surface of the horizontal plate is in clearance fit with the longitudinal slide rail on the right side of the base plate.

[0013] Furthermore, one side of the loading part is connected to the first electric cylinder. The first electric cylinder applies a force in the X direction to the loading part. When the first electric cylinder is working, the loading part and the upper horizontal plate move in the X direction along the transverse slide rail, and the lower control arm is subjected to a force in the X direction, resulting in X-direction movement.

[0014] Furthermore, one side of the loading part is connected to the second electric cylinder, which applies a force in the Y direction to the loading part. When the second electric cylinder is working, the loading part and the middle horizontal plate move in the Y direction along the longitudinal slide rail, and the lower control arm is subjected to a force in the Y direction, resulting in Y-direction movement.

[0015] Furthermore, each of the two outer sides of the lower control arm fixing device is provided with a bearing seat, and a thrust roller bearing is installed on each bearing seat. Each of the two ends of the lower control arm fixing device is provided with a connecting shaft, and each connecting shaft is connected to the thrust roller bearing. One of the connecting shafts passes through the bearing seat, so that the connecting shaft is connected to the motor. When the motor works, it drives the lower control arm fixing device to rotate.

[0016] The beneficial effects of this utility model are:

[0017] 1. When the first electric cylinder is working, the slide moves in the X direction, and the lower control arm is subjected to a loading force in the X direction; when the second electric cylinder is working, the slide moves in the Y direction, and the lower control arm is subjected to a loading force in the Y direction; when the motor is working, the lower control arm is subjected to a loading force in the XY direction; this utility model can simultaneously apply loading forces in multiple directions to the lower control arm, and the slide drives the lower control arm to move in the X or Y direction. The bearing seat and thrust roller bearing enable the lower control arm to twist. This test bench is more consistent with the force conditions of the lower control arm under actual vehicle conditions.

[0018] 2. By programming the first electric cylinder, the second electric cylinder, and the motor to work at a set frequency, multi-condition sequential testing of the lower control arm can be achieved, and the working conditions can be changed without human intervention, resulting in a high degree of automation.

[0019] 3. The connection method of this utility model ensures structural strength, and the simulation of multiple working conditions can improve the accuracy of the test. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the slide and loading part of this utility model.

[0022] Figure 3 This is a schematic diagram of the loading part of the lower control arm fixing device of this utility model.

[0023] In the diagram: 1. Lower control arm fixing device; 2. Lower control arm; 3. Loading part; 3-1. Ball joint fixing seat; 4. Upper horizontal plate; 4-1. Upper slider; 5. Middle horizontal plate; 5-1. Transverse slide rail; 5-2. Middle slider; 6. Base plate; 6-1. Longitudinal slide rail; 7. First electric cylinder; 8. Second electric cylinder; 9. Worktable; 10. Bearing seat; 11. Thrust roller bearing; 12. Motor. Detailed Implementation

[0024] To make the purpose, technical solution and advantages of this utility model clearer, the present utility model will be further described below with reference to the accompanying drawings.

[0025] This utility model durability test bench is used for durability testing of the lower control arm in multiple movement directions. This utility model durability test bench can conduct durability tests on the lower control arm under stress conditions simulating a real vehicle.

[0026] like Figure 1 As shown, the lower control arm fixing device 1 is used to simulate the subframe. A bushing mounting seat is provided on the lower control arm fixing device 1, and a bushing is press-fitted onto the lower control arm 2. The bushing on the lower control arm 2 is hinged to the bushing mounting seat on the lower control arm fixing device 1, thus realizing the connection between the lower control arm 2 and the lower control arm fixing device 1. The connection between the lower control arm 2 and the lower control arm fixing device 1 simulates the connection relationship between the lower control arm 2 and the subframe.

[0027] The ball joint mounting point is located on the loading part 3, such as... Figure 3 As shown, the loading part 3 is a cavity with one open side, preferably a cuboid. The cuboid facing the lower control arm 2 is open. The bottom surface of the loading part 3 is fixedly connected to the upper surface of the upper horizontal plate 4. The top surface of the loading part 3 serves as a ball joint fixing seat 3-1. The ball joint is located inside the cuboid-shaped loading part 3. The ball joint includes a spherical head and a rod-shaped handle. The spherical head is connected to the bottom side of the top surface of the loading part 3, and the rod-shaped handle is hinged to the mounting hole on the lower control arm 2 by riveting. Figure 3 As shown, a square cavity is connected to the bottom side of the top surface of the loading part 3. The size of the square cavity is adapted to the size of the spherical head of the ball joint. The square cavity is used to accommodate the spherical head of the ball joint. The outer surface of the spherical head is clearance-fitted with the inner surface of the square cavity. The top surface of the square cavity is welded or bolted to the bottom side of the top surface of the loading part 3. The bottom surface of the square cavity has a through hole. One end of the ball joint rod-shaped shank extends from the through hole. The end of the rod-shaped shank extending from the through hole is hinged to the mounting hole on the lower control arm 2 by riveting. One end of the lower control arm 2 is connected to the loading part 3 by the ball joint. The connection between the lower control arm 2 and the loading part 3 is used to simulate the connection between the lower control arm 1 and the vehicle steering knuckle.

[0028] Figure 1 and Figure 2 In this context, the X and Y directions are defined according to the vehicle coordinate system. For example... Figure 2As shown, the loading part 3 is disposed on the slide table, which includes an upper horizontal plate 4, a middle horizontal plate 5, and a bottom plate 6. The bottom of the loading part 3 is mounted on the top surface of the upper horizontal plate 4. Upper sliders 4-1 are symmetrically arranged at both ends of the bottom surface of the upper horizontal plate 4. There can be one or two upper sliders 4-1 on each side. Two elongated transverse slide rails 5-1 are symmetrically arranged on the upper surface of the middle horizontal plate 5. The transverse slide rails 5-1 are arranged along the X-direction, allowing the upper horizontal plate 4 to slide back and forth along the transverse slide rails 5-1 in the X-direction. In a specific embodiment, the upper slider 4-1 at the front end of the bottom surface of the upper horizontal plate 4 is fitted onto the transverse slide rail 5-1 at the front end of the middle horizontal plate 5, with a clearance fit between the upper slider 4-1 at the front end of the bottom surface of the upper horizontal plate 4 and the transverse slide rail 5-1 at the front end of the middle horizontal plate 5. The upper slider 4-1 at the rear end of the bottom surface of the upper horizontal plate 4 is fitted onto the transverse slide rail 5-1 at the rear end of the middle horizontal plate 5, with a clearance fit between the upper slider 4-1 at the rear end of the bottom surface of the upper horizontal plate 4 and the transverse slide rail 5-1 at the rear end of the middle horizontal plate 5.

[0029] A middle-layer slider 5-2 is symmetrically arranged on the left and right sides of the bottom surface of the middle horizontal plate 5. There can be one or two middle-layer sliders 5-2 on each side. The base plate 6 is mounted on a workbench. Two elongated longitudinal slide rails 6-1 are symmetrically arranged on the left and right sides of the upper surface of the base plate 6. The longitudinal slide rails 6-1 are arranged along the Y-direction, allowing the middle horizontal plate 5 to slide back and forth along the longitudinal slide rails 6-1 in the Y-direction. In a specific embodiment, the middle-layer slider 5-2 on the left side of the bottom surface of the middle horizontal plate 5 is fitted onto the longitudinal slide rail 6-1 on the left side of the base plate 6, with a clearance fit. The middle-layer slider 5-2 on the right side of the bottom surface of the middle horizontal plate 5 is fitted onto the longitudinal slide rail 6-1 on the right side of the base plate 6, with a clearance fit.

[0030] The first electric cylinder 7 is connected to one side of the loading part 3, which is a surface adjacent to the opening surface on the loading part 3. The first electric cylinder 7 applies a force in the X direction, i.e., laterally, to the loading part 3. When the first electric cylinder 7 is working, by setting the working frequency and direction of the first electric cylinder 7, the first electric cylinder 7 applies a pulling force or a pushing force to the loading part 3, so that the loading part 3 and the upper horizontal plate 4 move in the X direction along the lateral slide rail 5-1. The loading part 3 is connected to a ball joint, and the ball joint is connected to the lower control arm 2, so that the lower control arm is subjected to a force in the X direction and moves in the X direction. The first electric cylinder 7 is programmed to maintain a constant force.

[0031] The second electric cylinder 8 is connected to the loading part 3, which includes a back surface opposite to the opening surface of the loading part 3. The second electric cylinder 8 is connected to the back surface of the loading part 3. The second electric cylinder 8 applies a Y-direction, i.e., longitudinal force to the loading part 3. When the second electric cylinder 8 is working, by setting the working frequency and direction of the second electric cylinder 8, the second electric cylinder 8 applies a pulling or pushing force to the loading part 3, causing the loading part 3 and the middle horizontal plate 5 to move in the Y direction along the longitudinal slide rail 6-1. The loading part 3 is connected to a ball joint, which is connected to the lower control arm 2, thereby causing the lower control arm 2 to move in the Y direction due to the force in the Y direction. The second electric cylinder 8 is programmed to use an alternating cyclic force.

[0032] like Figure 1 and Figure 3 As shown, the lower control arm fixing device 1 is generally rectangular, with an open side facing the lower control arm 2 for easy installation. Two bearing seats 10 are mounted on the worktable 9, each with a thrust roller bearing 11. A bushing mounting seat is provided on the side of the lower control arm fixing device 1 facing the lower control arm 2. Each end of the lower control arm fixing device 1 has a connecting shaft, which connects to the thrust roller bearing 11. The connecting shaft passes through the bearing seat 10, allowing it to be splinedly connected to a motor 12 on the outside of the bearing seat 10. In one specific embodiment, a motor 12 is located on the outside of one of the bearing seats. The motor 12 is mounted on the worktable via a motor mounting base. The motor 12 is connected to a connecting shaft at one end of the lower control arm fixing device 1. When the motor 12 operates, it can drive the lower control arm fixing device 1 to rotate. The lower control arm 2 is connected to the lower control arm fixing device 1, causing the lower control arm 2 to experience forces in the XY directions and simultaneously generate a torsion around the X-axis.

[0033] In this invention, the first electric cylinder 7, the second electric cylinder 8, and the motor 12 can be controlled by a PLC program. The first electric cylinder 7, the second electric cylinder 8, and the motor 12 work at a set frequency to execute the test program.

[0034] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A lower control arm multi-working condition endurance bench, one side of the lower control arm (2) is hinged with a lower control arm fixing device (1), characterized in that: The other side of the lower control arm (2) is hinged with a loading part (3), the loading part (3) is installed on a sliding table, the sliding table has two movement directions; the loading part (3) is connected with multiple power devices, the power devices connected with the loading part (3) work to drive the sliding table and the lower control arm (2) to produce displacement in X direction or Y direction; the lower control arm fixing device (1) is connected with power devices, the power devices connected with the lower control arm fixing device (1) work to drive the lower control arm (2) to produce torsional movement.

2. The durability bench for lower control arm multi-conditions according to claim 1, characterized in that: The lower control arm fixing device (1) is provided with a bushing mounting seat, the lower control arm (2) is press-fitted with a bushing, the bushing on the lower control arm (2) is hinged with the bushing mounting seat on the lower control arm fixing device (1), and the connection between the lower control arm (2) and the lower control arm fixing device (1) is used to simulate the connection between the lower control arm (2) and the auxiliary frame.

3. The durability bench for lower control arm in multiple working conditions according to claim 1, characterized in that: The loading part (3) is internally connected with a spherical hinge, the loading part (3) is a cavity with one open side, the side of the cavity facing the lower control arm (2) is open, the top surface of the loading part (3) serves as a spherical hinge fixing seat (3-1), the spherical hinge includes a spherical head and a rod-shaped handle, the spherical head is connected with the bottom side of the top surface of the loading part (3), and the rod-shaped handle is hinged with the mounting hole on the lower control arm (2).

4. The lower control arm multi-working condition durability bench of claim 3, wherein: The bottom side of the top surface of the loading part (3) is connected with a square cavity, the square cavity is used to accommodate the spherical head of the spherical hinge, the outer surface of the spherical head is gap-fitted with the inner surface of the square cavity, the top surface of the square cavity is connected with the bottom side of the top surface of the loading part (3), the bottom surface of the square cavity is provided with a through hole, one end of the rod-shaped handle of the spherical hinge extends out of the through hole, and the end of the rod-shaped handle extending out of the through hole is hinged with the mounting hole on the lower control arm (2), and the connection between the lower control arm (2) and the loading part (3) is used to simulate the connection between the lower control arm (2) and the steering knuckle of the vehicle.

5. The lower control arm multi-working condition durability bench of claim 1, wherein: The loading part (3) is arranged on a sliding table, the sliding table includes an upper horizontal plate (4), a middle horizontal plate (5) and a bottom plate (6), the loading part (3) is installed on the top surface of the upper horizontal plate (4), the bottom surface of the upper horizontal plate (4) is symmetrically provided with upper layer sliding blocks (4-1) at the front and rear ends, the upper surface of the middle horizontal plate (5) is symmetrically provided with two long strip-shaped transverse sliding rails (5-1) at the front and rear ends, the transverse sliding rails (5-1) are arranged along the X direction, and the upper horizontal plate (4) can slide back and forth along the transverse sliding rails (5-1) in the X direction.

6. The lower control arm multi-working condition durability bench of claim 5, wherein: The upper layer sliding block (4-1) at the front end of the bottom surface of the upper horizontal plate (4) is sleeved on the transverse sliding rail (5-1) at the front end of the middle horizontal plate (5), the upper layer sliding block (4-1) at the front end of the bottom surface of the upper horizontal plate (4) is gap-fitted with the transverse sliding rail (5-1) at the front end of the middle horizontal plate (5), the upper layer sliding block (4-1) at the rear end of the bottom surface of the upper horizontal plate (4) is sleeved on the transverse sliding rail (5-1) at the rear end of the middle horizontal plate (5), and the upper layer sliding block (4-1) at the rear end of the bottom surface of the upper horizontal plate (4) is gap-fitted with the transverse sliding rail (5-1) at the rear end of the middle horizontal plate (5).

7. The lower control arm multi-working condition durability bench of claim 5, wherein: The bottom surface of the middle horizontal plate (5) is symmetrically provided with middle layer sliding blocks (5-2) on the left and right sides, the upper surface of the bottom plate (6) is symmetrically provided with two long strip-shaped longitudinal sliding rails (6-1) on the left and right sides, the longitudinal sliding rails (6-1) are arranged along the Y direction, the middle layer sliding block (5-2) on the left side of the bottom surface of the middle horizontal plate (5) is sleeved on the longitudinal sliding rail (6-1) on the left side of the bottom plate (6), the middle layer sliding block (5-2) on the left side of the bottom surface of the middle horizontal plate (5) is in clearance fit with the longitudinal sliding rail (6-1) on the left side of the bottom plate (6), the middle layer sliding block (5-2) on the right side of the bottom surface of the middle horizontal plate (5) is sleeved on the longitudinal sliding rail (6-1) on the right side of the bottom plate (6), and the middle layer sliding block (5-2) on the right side of the bottom surface of the middle horizontal plate (5) is in clearance fit with the longitudinal sliding rail (6-1) on the right side of the bottom plate (6).

8. The lower control arm multi-working condition durability bench of claim 1, wherein: One side of the loading part (3) is connected with a first electric cylinder (7), the first electric cylinder (7) applies a force in the X direction to the loading part (3), when the first electric cylinder (7) works, the loading part (3) and the upper horizontal plate (4) move in the X direction along the transverse sliding rail (5-1), and the lower control arm moves in the X direction under the action of the force in the X direction.

9. The lower control arm multi-working condition durability bench of claim 1, wherein: One side of the loading part (3) is connected with a second electric cylinder (8), the second electric cylinder (8) applies a force in the Y direction to the loading part (3), when the second electric cylinder (8) works, the loading part (3) and the middle horizontal plate (5) move in the Y direction along the longitudinal sliding rail (6-1), and the lower control arm (2) moves in the Y direction under the action of the force in the Y direction.

10. The lower control arm multi-working condition durability bench of claim 1, wherein: The lower control arm fixing device (1) is provided with a bearing seat (10) on each outer side of the two ends, a thrust roller bearing (11) is installed on each bearing seat, each end of the lower control arm fixing device (1) is provided with a connecting shaft, each connecting shaft is connected with the thrust roller bearing (11), one of the connecting shafts penetrates through the bearing seat (10), so that the connecting shaft is connected with a motor (12), and the motor (12) works to drive the lower control arm fixing device (1) to twist.

Images