Rigidity testing device for automotive bushing

Abstract

The utility model discloses a vehicle bushing rigidity testing device, and relates to the technical field of automobile part processing, the vehicle bushing rigidity testing device comprises a testboard and a sliding seat, the left side of the top of the testboard is provided with a servo motor, and the output end of the servo motor penetrates through the top of the testboard and is connected with a first ball screw; and a transmission belt is arranged outside the first ball screw, a second ball screw is further connected to the interior of the transmission belt, and screw nuts are connected to the exteriors of the first ball screw and the second ball screw. According to the rigidity testing device for the bushing for the vehicle, a servo motor works to drive a first ball screw to rotate, and the first ball screw drives a transmission belt to drive second ball screws to rotate, so that three groups of screw nuts can respectively move downwards in the vertical direction along the exteriors of the first ball screw and the two second ball screws; in this way, the effect of controlling the three stations under the action of one set of servo motors is achieved, the testing efficiency is improved, and meanwhile the set number of the servo motors is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts processing, in particular to a vehicle bushing stiffness testing device. Background Art

[0002] Bushings are accessories used outside mechanical parts to achieve sealing, wear protection and other functions. They refer to rings that act as gaskets. The use of bushings can reduce the wear, vibration and noise of equipment, have anti-corrosion effects, facilitate the maintenance of mechanical equipment, and simplify the structure and manufacturing process of equipment. Before using the bushing as a finished product, the performance of the bushing needs to be tested, such as the stiffness of the bushing.

[0003] Most existing testing devices can only test one group of bushings at a time, and materials must be frequently loaded and unloaded during use, resulting in low testing efficiency and high labor intensity.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a vehicle bushing stiffness testing device is proposed. Utility Model Content

[0005] The utility model aims to provide a vehicle bushing stiffness testing device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vehicle bushing stiffness testing device, comprising a test bench and a sliding seat, a servo motor is installed on the left side of the top of the test bench, and the output end of the servo motor passes through the top of the test bench and is connected to a first ball screw, a transmission belt is arranged on the outside of the first ball screw, and a second ball screw is also connected to the inside of the transmission belt, the first ball screw and the second ball screw are both connected to the outside with a screw nut, and a first sliding plate is arranged at the bottom front end of the screw nut, the sliding seat is installed on the surface of the test bench, the rear end of the first sliding plate is connected to a first swing arm through a pin shaft, and the other end of the first swing arm is connected to a first round table through a pin shaft, the front end of the first round table is installed with a second round table, and a rotating shaft is rotatably arranged in the middle of the second round table.

[0007] Furthermore, two second ball screws are provided, and the first ball screw and the second ball screw are parallel to each other.

[0008] Furthermore, the surface of the first truncated cone is connected to a second swing arm via a pin shaft, and the other end of the second swing arm is connected to a second sliding plate via a pin shaft.

[0009] Furthermore, a test head is installed inside the first sliding plate and the second sliding plate, and the first sliding plate and the second sliding plate are in a right-angle structure.

[0010] Furthermore, the first sliding plate and the second sliding plate are both slidably connected to the sliding seat, and nine sliding seats and nine test heads are provided respectively, and the ratio of the number of the first truncated table and the number of the test heads provided is 1:3.

[0011] Furthermore, a horizontal support plate is fixed to the surface of the test bench, and one end of the first ball screw away from the servo motor is rotatably connected to the horizontal support plate.

[0012] The utility model provides a vehicle bushing stiffness testing device, which has the following beneficial effects:

[0013] 1. The servo motor of the utility model provides a rotational force for the first ball screw, so that the first ball screw has the ability to convert the rotational force into displacement of the screw nut in the vertical direction, and the screw nut is used to drive the first sliding plate to move toward or away from the center of the first truncated table along the inside of the sliding seat, so that the supporting angle of the first swing arm to the first truncated table is changed, and the first truncated table is rotated, and the second sliding plate connected to the second swing arm is driven by the first truncated table to move toward or away from the center of the first truncated table along the inside of another sliding seat, so as to facilitate the clamping and stiffness testing of bushings of different specifications.

[0014] 2. The operation of the servo motor of the utility model will drive the first ball screw to rotate, and the first ball screw drives the transmission belt to rotate the second ball screw, so that the three sets of screw nuts can be respectively displaced downward in the vertical direction along the first ball screw and the outside of the two second ball screws, so as to achieve the effect of controlling the three workstations separately under the action of one set of servo motors, thereby improving the test efficiency and saving the number of servo motors. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a vehicle bushing stiffness testing device of the utility model;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the first swing arm and the first truncated table of a vehicle bushing stiffness testing device of the utility model;

[0017] Figure 3 The utility model is a three-dimensional structural schematic diagram of a test bench of a vehicle bushing stiffness test device.

[0018] In the figure: 1. test bench; 2. servo motor; 3. first ball screw; 4. transmission belt; 5. second ball screw; 6. screw nut; 7. first sliding plate; 8. sliding seat; 9. first swing arm; 10. first round table; 11. second round table; 12. rotating shaft; 13. second swing arm; 14. second sliding plate; 15. test head; 16. horizontal support plate. DETAILED DESCRIPTION

[0019] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0020] like Figures 1 to 3 As shown, a vehicle bushing stiffness testing device includes a test bench 1 and a sliding seat 8, a servo motor 2 is installed on the left side of the top of the test bench 1, and the output end of the servo motor 2 passes through the top of the test bench 1 and is connected to a first ball screw 3, the outsides of the first ball screw 3 and the second ball screw 5 are both connected to a screw nut 6, and a first sliding plate 7 is arranged at the bottom front end of the screw nut 6, the sliding seat 8 is installed on the surface of the test bench 1, the rear end of the first sliding plate 7 is connected to a first swing arm 9 through a pin shaft, and the other end of the first swing arm 9 is connected to a first round table 10 through a pin shaft, the front end of the first round table 10 is installed with a second round table 11, and the middle part of the second round table 11 is rotated by a pin shaft. A rotating shaft 12 is provided, the surface of the first truncated table 10 is connected to the second swing arm 13 through a pin shaft, and the other end of the second swing arm 13 is connected to the second sliding plate 14 through a pin shaft, and a test head 15 is installed on the inner side of the first sliding plate 7 and the second sliding plate 14, and the first sliding plate 7 and the second sliding plate 14 are in a right-angle structure, the first sliding plate 7 and the second sliding plate 14 are both slidably connected to the sliding seat 8, and the sliding seat 8 and the test head 15 are each provided with nine, the number ratio of the first truncated table 10 and the test head 15 is 1:3, a horizontal support plate 16 is fixed to the surface of the test bench 1, and the end of the first ball screw 3 away from the servo motor 2 is rotatably connected to the horizontal support plate 16.

[0021] The specific operation is as follows: the servo motor 2 provides a rotational force for the first ball screw 3, so that the first ball screw 3 has the ability to convert the rotational force into the displacement of the screw nut 6 in the vertical direction, and the screw nut 6 is used to drive the first sliding plate 7 to move toward or away from the center of the first truncated table 10 along the inside of the sliding seat 8, so that the supporting angle of the first swing arm 9 to the first truncated table 10 is changed, and the first truncated table 10 is rotated, and the second sliding plate 14 connected to the second swing arm 13 is driven by the first truncated table 10 to move along the inside of another sliding seat 8 toward or away from the center of the first truncated table 10, so as to facilitate the clamping and stiffness testing of bushings of different specifications.

[0022] like Figure 3 As shown, a transmission belt 4 is arranged outside the first ball screw 3, and a second ball screw 5 is also connected inside the transmission belt 4. Two second ball screws 5 are arranged, and the first ball screw 3 and the second ball screw 5 are parallel to each other.

[0023] The specific operation is as follows: the servo motor 2 will drive the first ball screw 3 to rotate, and the first ball screw 3 will drive the transmission belt 4 to rotate the second ball screw 5, so that the three sets of screw nuts 6 can be respectively displaced downward in the vertical direction along the outside of the first ball screw 3 and the two second ball screws 5, so as to achieve the effect of controlling the three workstations separately under the action of one set of servo motors 2, thereby improving the test efficiency and saving the number of servo motors 2.

[0024] In summary, when the vehicle bushing stiffness testing device is used, the three workstations are first adjusted according to the bushing size to be measured, that is, the servo motor 2 is started to drive the first ball screw 3 to rotate, and the first ball screw 3 drives the transmission belt 4 to drive the second ball screw 5 to rotate, so that the three sets of screw nuts 6 are respectively displaced downward in the vertical direction along the outside of the first ball screw 3 and the two second ball screws 5. Since the displacement of the screw nuts 6 will promote the first sliding plate 7 to move along the inside of the sliding seat 8 toward the center of the first truncated table 10, the supporting angle of the first swing arm 9 to the first truncated table 10 will be affected by the displacement of the first sliding plate 7, so that the first truncated table 10 and the second truncated table 11 rotate about the outside of the rotating shaft 12, and the rotating first truncated table 10 will drive the second sliding plate 14 connected to the second swing arm 13 to move along the inside of another sliding seat 8 toward the center of the first truncated table 10, and the first sliding plate 7 and the second sliding plate 14 are closed together to facilitate the placement of bushings of different specifications;

[0025] When the bushing is placed coaxially with the second truncated table 11, the servo motor 2 is started again to drive the first ball screw 3 to rotate, so that the three sets of screw nuts 6 are respectively displaced upward in the vertical direction along the outside of the first ball screw 3 and the two second ball screws 5, and the first sliding plate 7 is driven by the screw nuts 6 to displace along the inside of the sliding seat 8 in a direction away from the center of the first truncated table 10 until the test head 15 on the inner side of the first sliding plate 7 and the second sliding plate 14 contacts the bushing to be tested. Since the test head 15 is composed of a displacement sensor and a pressure sensor, the displacement under different extrusion pressures and the pressure borne by the bushing are obtained through the displacement sensor and the pressure sensor and sent to the single-chip microcomputer for calculation to obtain the stiffness data and complete the stiffness test.

[0026] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A vehicle bushing stiffness testing device, comprising a test bench (1) and a sliding seat (8), characterized in that: A servo motor (2) is installed on the left side of the top of the test bench (1), and the output end of the servo motor (2) passes through the top of the test bench (1) and is connected to a first ball screw (3); a transmission belt (4) is arranged outside the first ball screw (3), and the inside of the transmission belt (4) is also connected to a second ball screw (5); the outsides of the first ball screw (3) and the second ball screw (5) are both connected to a screw nut (6), and a first sliding plate (7) is arranged at the bottom front end of the screw nut (6); the sliding seat (8) is installed on the surface of the test bench (1); the rear end of the first sliding plate (7) is connected to a first swing arm (9) through a pin shaft, and the other end of the first swing arm (9) is connected to a first round table (10) through a pin shaft; the front end of the first round table (10) is installed with a second round table (11), and a rotating shaft (12) is rotatably arranged in the middle of the second round table (11).

2. A vehicle bushing stiffness testing device according to claim 1, characterized in that: Two second ball screws (5) are provided, and the first ball screw (3) and the second ball screw (5) are parallel to each other.

3. The vehicle bushing stiffness testing device according to claim 1, characterized in that: The surface of the first truncated table (10) is connected to a second swing arm (13) via a pin shaft, and the other end of the second swing arm (13) is connected to a second sliding plate (14) via a pin shaft.

4. A vehicle bushing stiffness testing device according to claim 3, characterized in that: A test head (15) is installed inside the first sliding plate (7) and the second sliding plate (14), and the first sliding plate (7) and the second sliding plate (14) are in a right-angle structure.

5. The vehicle bushing stiffness testing device according to claim 4, characterized in that: The first sliding plate (7) and the second sliding plate (14) are both slidably connected to the sliding seat (8), and nine sliding seats (8) and nine test heads (15) are provided respectively, and the ratio of the number of the first truncated tables (10) and the number of the test heads (15) is 1:

3.

6. The vehicle bushing stiffness testing device according to claim 1, characterized in that: A horizontal support plate (16) is fixed on the surface of the test bench (1), and one end of the first ball screw (3) away from the servo motor (2) is rotatably connected to the horizontal support plate (16).

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