Steering column clamp capable of adjusting and enhancing inherent frequency
By adopting the design of rotating shaft and adjustment bolts in the steering column fixture, the angle adjustment of the fixture is realized, and the natural frequency is increased by the setting of the reinforcement plate, which solves the problem that traditional fixtures cannot adjust the angle and natural frequency is too low, reducing the risk of resonance and improving versatility.
Patent Information
- Application Number
- CN202421990415.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-16
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-08-16
AI Technical Summary
Traditional steering column fixtures cannot adjust the test angle, and the natural frequency is low, so they are prone to resonance with the test pieces, making it difficult to meet the test needs of different projects.
The top plate and the side plate are connected by the rotating shaft and adjustment bolts to achieve angle adjustment of the top plate, and the natural frequency of the fixture is lifted by setting the top reinforcement plate, the front transverse reinforcement plate and the rear transverse reinforcement plate.
The angle adjustment of the fixture is achieved, versatility is improved, and the risk of resonance with the test piece is reduced by increasing the natural frequency.
Smart Images
Figure CN222964846U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of machinery, and particularly relates to a steering column fixture which is adjustable and can strengthen the natural frequency. Background Art
[0002] Before mass production of the steering column, a series of tests need to be carried out on the column to ensure that the various performances of the column meet the customer requirements. As a very important test among them, the vibration durability test can verify whether the fatigue life of the column reaches the target requirements.
[0003] Refer to Figure 1 , the traditional tooling fixture includes a bottom plate 2, a top plate 4, side plates 6, a front plate 7, a rear plate 3, a test piece mounting plate 5, and mounting bolts 1. The bottom of the bottom plate 2 is provided with mounting bolts 1. The side plates 6, the front plate 7, and the rear plate 3 are installed on the top of the bottom plate 2. The side and the rear end of the top plate 4 are respectively connected to the side plate 6 and the rear plate 3. The test piece mounting plate 5 is installed at the bottom of the top plate 4. The vertical surfaces of the two front plates 7 are respectively connected to the corresponding side plates 6.
[0004] The traditional tooling fixture can support the completion of the test. However, since the top plate 4 and the side plate 6 are fixed and cannot be adjusted in angle, it is necessary to redesign the tooling fixture for different projects. In addition, in the fixture design process, in order to avoid resonance problems with the test piece, its natural frequency should be as high as possible.
[0005] Therefore, it is necessary to design a steering column fixture which is adjustable and can strengthen the natural frequency to meet the test angle requirements of different projects and at the same time reduce the risk of resonance with the test piece. Summary of the Invention
[0006] The purpose of the utility model is to overcome the deficiencies of the prior art, and provides a steering column fixture which is adjustable and can strengthen the natural frequency to meet the test angle requirements of different projects and at the same time reduce the risk of resonance with the test piece.
[0007] In order to achieve the above purpose, the utility model is a steering column fixture which is adjustable and can strengthen the natural frequency, including a bottom plate, a top plate, side plates, a front transverse reinforcing plate, a rear transverse reinforcing plate, a test piece mounting plate, and a top reinforcing plate. Two side plates are installed on the top of the bottom plate. An arc-shaped groove is provided on the surface of the side plates. The rear end of the top plate is connected to the side plates by a rotating shaft. A connecting piece is installed on the side of the top plate. The end of the connecting piece passes through the arc-shaped groove of the side plates and is fastened by an adjusting bolt. The top reinforcing plate is fixed to the top of the top plate. The test piece mounting plate is installed at the bottom of the top plate. The front transverse reinforcing plate is fixed to the front sides of the side plates and the bottom plate. The rear transverse reinforcing plate is fixed to the rear sides of the side plates and the bottom plate.
[0008] A plurality of mounting bolts are installed at the bottom of the bottom plate.
[0009] There are three of the described connecting pieces, adjusting bolts, and arc-shaped grooves respectively.
[0010] The positions of the described connecting pieces correspond to those of the arc-shaped grooves.
[0011] At the center of the upper ends of the described front transverse reinforcing plate and rear transverse reinforcing plate, there are weight reduction notches.
[0012] The described top reinforcing plate is provided with weight reduction holes.
[0013] Compared with the prior art, the present utility model connects the top plate and the side plate through a rotating shaft and an adjusting bolt to realize the angle adjustment of the top plate, so as to meet the test angle requirements of different projects and improve the versatility of the fixture. The setting of the top reinforcing plate and the front transverse reinforcing plate improves the natural frequencies in the vertical and horizontal directions and reduces the risk of resonance with the test piece. Brief Description of the Drawings
[0014] Figure 1 It is a schematic structural view of a traditional tooling fixture.
[0015] Figure 2 It is a schematic structural view of the front side perspective of the present utility model.
[0016] Figure 3 It is a schematic structural view of the rear side perspective of the present utility model. Detailed Description of the Preferred Embodiment
[0017] The present utility model will be further described in conjunction with the accompanying drawings.
[0018] Refer to Figure 2 and Figure 3 , the present utility model is an adjustable steering column fixture with enhanced natural frequency, including a bottom plate, a top plate, side plates, a front transverse reinforcing plate, a rear transverse reinforcing plate, a test piece mounting plate, and a top reinforcing plate. Two side plates 6 are installed on the top of the bottom plate 2. Arc-shaped grooves are provided on the surfaces of the side plates 6. The rear end of the top plate 4 is connected to the side plate 6 by a rotating shaft 8. A connecting piece is installed on the side surface of the top plate 4. The end of the connecting piece passes through the arc-shaped groove of the side plate 6 and is fastened by an adjusting bolt 9. A top reinforcing plate 10 is fixed on the top of the top plate 4. A test piece mounting plate 5 is installed at the bottom of the top plate 4. The front transverse reinforcing plate 12 is fixed to the front side of the side plate 6 and the front side of the bottom plate 2. The rear transverse reinforcing plate 11 is fixed to the rear side of the side plate 6 and the rear side of the bottom plate 2.
[0019] A plurality of mounting bolts 1 are installed at the bottom of the bottom plate 2 to facilitate the fixation of the fixture.
[0020] There are three of the connecting pieces, adjusting bolts 9, and arc-shaped grooves respectively, which can not only fasten the top plate 4 more firmly but also prevent the influence on the test results caused by the loosening of a certain adjusting bolt 9 during the vibration durability test.
[0021] The position of the connecting piece corresponds to that of the arc-shaped groove, facilitating the installation of the top plate 4 and the side plate 6.
[0022] When the present utility model is in operation and it is necessary to adjust the test angle of the test piece, the adjusting bolt 9 is unscrewed, and the top plate 4 is turned up and down along the rotating shaft 8. After the angle of the top plate 4 is adjusted, the adjusting bolt 9 is tightened.
[0023] Both ends of the front transverse reinforcing plate 12 are fixedly connected to the side plates 6 on both sides, greatly improving the natural frequency of the entire fixture in the horizontal direction. At the same time, the top reinforcing plate 10 is added, and the natural frequency of the entire fixture in the vertical direction is also improved.
[0024] After frequency testing, the vertical natural frequency of the traditional tooling fixture is 284 HZ, and the horizontal natural frequency is 350 HZ. When the top plate of the present utility model is at the maximum adjustment angle position, the vertical natural frequency is 336 HZ, and the horizontal natural frequency is 437 HZ. It can be seen that the present utility model effectively improves the natural frequency of the fixture itself and reduces the risk of resonance with the test piece.
[0025] A weight-reducing notch is provided at the center of the upper ends of the front transverse reinforcing plate 12 and the rear transverse reinforcing plate 11, and a weight-reducing hole is provided in the top reinforcing plate 10. When the natural frequency of the fixture meets the use requirements, the weight-reducing notch and the weight-reducing hole save materials, realize the lightweight of the fixture, and can better cope with the problem of increased material costs brought about by adding new parts.
[0026] The present utility model connects the top plate and the side plate through a rotating shaft and an adjusting bolt to realize the angle adjustment of the top plate, so as to meet the test angle requirements of different projects and improve the versatility of the fixture. The setting of the top reinforcing plate and the front transverse reinforcing plate improves the natural frequency in the vertical and horizontal directions and reduces the risk of resonance with the test piece. The present utility model can be widely applied to the vibration durability tests of different steering columns.
Claims
1. A steering column fixture with adjustable and enhanced natural frequency, comprising a bottom plate, a top plate, a side plate, a front transverse reinforcement plate, a rear transverse reinforcement plate, a test piece mounting plate, and a top reinforcement plate, characterized in that: Two side plates (6) are installed on the top of the bottom plate (2), and arc grooves are provided on the surfaces of the side plates (6). The rear end of the top plate (4) is connected to the side plates (6) by a rotating shaft (8). A connecting piece is installed on the side of the top plate (4), and the end of the connecting piece passes through the arc groove of the side plate (6) and is fastened by an adjusting bolt (9). A top reinforcing plate (10) is fixed on the top of the top plate (4), and a test piece mounting plate (5) is installed on the bottom of the top plate (4). The front transverse reinforcing plate (12) is fixed to the front side of the side plate (6) and the front side of the bottom plate (2), and the rear transverse reinforcing plate (11) is fixed to the rear side of the side plate (6) and the rear side of the bottom plate (2).
2. The steering column clamp with adjustable and enhanced natural frequency according to claim 1, characterized in that: A plurality of mounting bolts (1) are installed at the bottom of the base plate (2).
3. The steering column clamp with adjustable and enhanced natural frequency according to claim 1, characterized in that: There are three of each of the connecting piece, the adjusting bolt (9) and the arc-shaped groove.
4. The steering column clamp with adjustable and enhanced natural frequency according to claim 1, characterized in that: The connection piece corresponds to the position of the arc groove.
5. The steering column clamp with adjustable and enhanced natural frequency according to claim 1, characterized in that: A weight-reducing notch is provided in the centre of the upper ends of the front transverse reinforcing plate (12) and the rear transverse reinforcing plate (11).
6. The steering column clamp with adjustable and enhanced natural frequency according to claim 1, characterized in that: The top reinforcement plate (10) is provided with weight-reducing holes.