Vibration test clamp applied to steering system servo electronic control unit

Abstract

The utility model relates to the technical field of machinery, in particular to a vibration test clamp applied to a steering system servo electric control unit, which comprises a profiling base and a semicircular pressing plate, a profiling containing groove is arranged in the center of the profiling base, and a plurality of mounting holes are arranged on the surface of the profiling base along the edge of the profiling containing groove. A metal cooling fin of the servo electric control unit is erected on the profiling containing groove, a bottom component of the servo electric control unit is located in the profiling containing groove, the metal cooling fin is surrounded by the two semicircular pressing plates, a circle of boss is arranged on the upper portion of the inner ring of each semicircular pressing plate, and the outer ring of the metal cooling fin is located between the boss and the profiling base. And after penetrating through the semicircular pressing plate, the fastener is fixed with the mounting hole of the profiling base. Compared with the prior art, the radiating fins of the servo electric control unit are clamped through the profiling base and the semicircular pressing plate, rigid fixation is guaranteed, a plastic shell of the servo electric control unit is not damaged, and therefore the vibration test of the servo electric control unit is achieved.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, specifically a vibration test fixture applied to the servo electronic control unit of a steering system. Background Technology

[0002] The steering power unit consists of a servo electronic control unit and a steering servo motor. Because the structure of steering power units varies across different projects and platforms, and the servo electronic control unit is made entirely of plastic material, when the vibration test is only verifying the servo electronic control unit, it can only be installed on the corresponding steering servo motor. Vibration tests are then conducted on the steering power unit to verify its vibration resistance.

[0003] The entire testing process begins with the installation of the steering servo motor, continues until the motor is disassembled, and only then can the analysis be performed. However, some mechanical or electrical failures often only occur during vibration testing, making this verification method unsuitable for direct analysis of the servo control unit.

[0004] The structures and costs of steering servo motors vary, making it difficult to achieve good universality for all motor vibration fixtures. When conducting vibration tests on steering power units, it is often necessary to manufacture more types of vibration fixtures, which wastes a lot of cost and time.

[0005] While servo control units have relatively uniform structures and dimensions, their compact structure and predominantly plastic material limit the clamping area. Insufficient clamping force during vibration testing may cause the servo control unit to detach from the fixture, while excessive or uneven clamping force could lead to serious consequences such as mechanical damage.

[0006] Therefore, it is necessary to design a vibration test fixture for the servo electronic control unit of the steering system, which can not only maintain the structural integrity of the servo electronic control unit, but also provide rigid fixation so as to facilitate direct vibration testing of the servo electronic control unit. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a vibration test fixture for a steering system servo electronic control unit. While maintaining the structural integrity of the servo electronic control unit, it can also provide rigid fixation, so as to facilitate direct vibration testing of the servo electronic control unit.

[0008] To achieve the above objectives, this utility model is a vibration test fixture for a servo control unit of a steering system, including a contour base and a semi-circular pressure plate. The contour base has a contour receiving groove in the center, and several mounting holes are arranged on the surface of the contour base along the edge of the contour receiving groove. The metal heat sink of the servo control unit is mounted on the contour receiving groove, and the bottom component of the servo control unit is located inside the contour receiving groove. Two semi-circular pressure plates surround the metal heat sink. The upper part of the inner ring of the semi-circular pressure plate is provided with a boss. The outer ring of the metal heat sink is located between the boss and the contour base. Fasteners pass through the semi-circular pressure plates and are fixed to the mounting holes of the contour base.

[0009] The shape of the contour-following receiving groove matches the overall outer contour structure of the bottom component.

[0010] The bottom component includes a capacitor and a mounting bracket.

[0011] The contoured receiving groove has a through hole in the center.

[0012] The fasteners are M6 screws, and each semi-circular pressure plate is fixed with four M6 screws.

[0013] The contour base has 12 fixing holes evenly distributed along its edge. Twelve M12 screws pass through the corresponding fixing holes and are connected to the vibration table surface.

[0014] Compared with the prior art, this utility model uses a contoured base and a semi-circular pressure plate to clamp the heat sink of the servo electronic control unit, ensuring rigid fixation without damaging the plastic shell of the servo electronic control unit. This enables vibration testing of the servo electronic control unit, avoiding frequent disassembly and assembly of the steering servo motor in the overall vibration test of the steering power unit, and improving test efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the contour base of this utility model.

[0017] Figure 3 This is a schematic diagram of the semi-circular pressure plate of this utility model.

[0018] Figure 4 This is a structural diagram of the present invention in use.

[0019] Figure 5 This is a cross-sectional view of the present invention in use. Detailed Implementation

[0020] The present invention will now be further described with reference to the accompanying drawings.

[0021] See Figure 1 , Figure 2 and Figure 3 This utility model is a vibration test fixture for a servo control unit of a steering system, including a contour base and a semi-circular pressure plate. The contour base 1 has a contour receiving groove 11 in the center. Several mounting holes 12 are arranged on the surface of the contour base 1 along the edge of the contour receiving groove 11. The metal heat sink 32 of the servo control unit 3 is mounted on the contour receiving groove 11, and the bottom component 31 of the servo control unit 3 is located in the contour receiving groove 11. Two semi-circular pressure plates 2 surround the metal heat sink 32. The upper part of the inner ring of the semi-circular pressure plate 2 is provided with a boss 21. The outer ring of the metal heat sink 32 is located between the boss 21 and the contour base 1. After the fastener 4 passes through the semi-circular pressure plate 2, it is fixed to the mounting holes 12 of the contour base 1.

[0022] The contour base 1 is made of 7075 aluminum alloy and simulates the shape, size, and surface roughness of the steering servo motor contact surface. The contour base 1 serves as a support carrier for the servo electronic control unit.

[0023] The semi-circular pressure plate 2 is made of metal.

[0024] Considering that the servo control unit will be press-fitted onto the steering servo motor and additional sealant will be applied, the rigid fixation and uniform clamping force are ensured by the combination of the contour base 1 and the semi-circular pressure plate 2. Since the clamping part is a metal heat sink 32, it will not damage the plastic shell of the servo control unit.

[0025] The shape of the contour-following receiving groove 11 matches the overall outer contour structure of the bottom component 31, avoiding direct full-plane contact between the bottom component 31 and the contour-following base 1. The bottom component 31 includes a capacitor and a fixing bracket.

[0026] The contoured receiving groove 11 has a through hole in the center for easy use.

[0027] Fastener 4 is an M6 screw, and each semi-circular pressure plate 2 is fixed with four M6 screws, effectively ensuring the flatness and uniformity of the pressing. By controlling the tightening depth of the M6 ​​screws, the degree of pressing of the servo control unit 3 onto the contour base 1 is controlled.

[0028] The contour base 1 has 12 fixing holes 13 evenly distributed along its edge. 12 M12 screws pass through the corresponding fixing holes 13 and are connected to the vibration table surface to achieve rigid fixation of the contour base 1.

[0029] See Figure 4 , Figure 5When this utility model is in operation, the servo control unit 3 is first placed on the contour base 1, and the two semi-circular pressure plates 2 surround the servo control unit 3 from the left and right. The boss 21 presses down on the upper layer of the metal heat sink 32. The positions of the matching semi-circular pressure plates 2 and the mounting holes of the contour base 1 are aligned. The servo control unit 3 and the contour base 1 are then fastened together by the fasteners 4, thus achieving locking.

[0030] This invention uses a contoured base and a semi-circular pressure plate to clamp the heat sink of the servo control unit, ensuring rigid fixation without damaging the plastic shell of the servo control unit. This allows for vibration testing of the servo control unit, avoiding the frequent disassembly and reassembly of the steering servo motor required in overall vibration testing of the steering power unit, thus improving testing efficiency. This invention is applicable to dual pinion steering power motor products on different platforms.

[0031] This invention ensures that the servo control unit remains in its original factory condition throughout the testing process without disassembling the steering servo motor. This facilitates direct analysis of the servo control unit at each stage of the test, laying the foundation for subsequent analysis.

Claims

1. A vibration test fixture for a servo electronic control unit of a steering system, comprising a contoured base and a semi-circular pressure plate, characterized in that: The contour base (1) has a contour receiving groove (11) in the center. Several mounting holes (12) are arranged on the surface of the contour base (1) along the edge of the contour receiving groove (11). The metal heat sink (32) of the servo control unit (3) is mounted on the contour receiving groove (11), and the bottom component (31) of the servo control unit (3) is located in the contour receiving groove (11). Two semi-circular pressure plates (2) surround the metal heat sink (32). A boss (21) is provided on the upper part of the inner ring of the semi-circular pressure plate (2). The outer ring of the metal heat sink (32) is located between the boss (21) and the contour base (1). After the fastener (4) passes through the semi-circular pressure plate (2), it is fixed to the mounting hole (12) of the contour base (1).

2. The vibration test fixture for a servo electronic control unit of a steering system according to claim 1, characterized in that: The shape of the contoured receiving groove (11) matches the overall outer contour structure of the bottom component (31).

3. A vibration test fixture for a servo electronic control unit of a steering system according to claim 1 or 2, characterized in that: The bottom component (31) includes a capacitor and a fixing bracket.

4. A vibration test fixture for a servo electronic control unit of a steering system according to claim 1, characterized in that: The contoured receiving groove (11) has a through hole in the center.

5. A vibration test fixture for a servo electronic control unit of a steering system according to claim 1, characterized in that: The fastener (4) is an M6 screw, and each semi-circular pressure plate (2) is fixed with four M6 screws.

6. A vibration test fixture for a servo electronic control unit of a steering system according to claim 1, characterized in that: The contour base (1) has 12 fixing holes (13) evenly distributed on its edge. 12 M12 screws pass through the corresponding fixing holes (13) and are connected to the vibration table surface.

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