A vibration test fixture for a muffler

Abstract

This utility model relates to the field of vibration testing auxiliary equipment technology, and in particular to a fixed fixture for a vibration test of a muffler. It is characterized by comprising: a base plate with multiple first mounting holes for fixing the fixture to a vibration test bench; a pair of side plates, which are parallel and symmetrically fixed vertically to opposite sides of the base plate; a vertical plate, which is vertically fixed to the base plate, with its two sides respectively fixedly connected to the inner sidewalls of the pair of side plates; the surface of the vertical plate is perpendicular to the surface of the side plates; multiple second mounting holes are provided on the vertical plate for mounting the muffler to be tested; and a top plate, which is parallel to the base plate and fixedly installed at the top of the pair of side plates and the vertical plate, forming a rigid frame structure together with the base plate, side plates, and vertical plate. Compared with the prior art, this utility model achieves excellent rigidity through a frame structure combined with reinforcing ribs and full welding connections, capable of withstanding high-frequency or large-amplitude vibrations, effectively avoiding self-resonance or deformation.

Description

Technical Field

[0001] This utility model relates to the field of vibration testing auxiliary equipment technology, and in particular to a fixed fixture for a muffler vibration test. Background Technology

[0002] In the research and development and production of mufflers, vibration testing is a key step in evaluating their structural reliability and acoustic performance stability. During the test, the muffler must be firmly fixed to the vibration test bench to simulate its vibration environment under actual working conditions (such as the bumps of a vehicle in motion, engine vibration transmission, etc.). If the fixing fixture is not rigid enough, the center of gravity is off, or the installation is unstable, it will cause the muffler to generate additional displacement during vibration or the fixture itself to resonate, interfering with the accuracy of the test data. It may even cause damage to the muffler or experimental safety hazards due to loose fixture.

[0003] Existing fixed fixtures often have the following problems: insufficient structural rigidity, making it difficult to withstand high-frequency or large-amplitude vibrations; excessive weight leading to increased load on the test bench, or excessive weight reduction affecting structural strength; center of gravity shift causing additional vibrations, affecting test accuracy; and poor compatibility with silencers of different specifications, which urgently need improvement. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model proposes a fixing fixture for a muffler vibration test.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A vibration testing fixture for a muffler, characterized in that it comprises:

[0007] A base plate, wherein a plurality of first mounting holes are provided on the base plate for fixing the tooling to the vibration test bench;

[0008] A pair of side plates, which are parallel and symmetrical to each other, are vertically fixed to two opposite sides of the base plate;

[0009] A vertical plate is fixed to the base plate, and its two sides are respectively fixedly connected to the inner sidewalls of the pair of side plates; the surface of the vertical plate is perpendicular to the surface of the side plates; the vertical plate is provided with a plurality of second mounting holes for mounting the silencer to be tested;

[0010] The top plate is arranged parallel to the bottom plate and is fixedly installed on the top of the pair of side plates and the vertical plate, forming a rigid frame structure together with the bottom plate, the side plates and the vertical plate.

[0011] Furthermore, the base plate is provided with a plurality of first weight-reduction holes, and the plurality of first mounting holes and the plurality of first weight-reduction holes are arranged in a rectangular array, and the first mounting holes are arranged in a full configuration so that the center of gravity of the tooling is centered.

[0012] Furthermore, a set of weight-reducing holes is provided on the surface of the side plate, the set of weight-reducing holes including a second weight-reducing hole located at the center of the plate surface and a plurality of third weight-reducing holes arranged in the vertical direction.

[0013] Furthermore, the second weight-reducing hole is a triangular hole with rounded corners; the diameter of the plurality of third weight-reducing holes gradually decreases in the direction away from the base plate.

[0014] Furthermore, a fourth weight-reducing hole is provided on the surface of the upright plate.

[0015] Furthermore, reinforcing ribs are provided at the connection between the side plate and the upright plate, and / or at the connection between the side plate and the top plate.

[0016] Furthermore, the fixed connections between the base plate, the side plate, the upright plate, and the top plate are all fully welded connections.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] Compared with existing technologies, this utility model achieves excellent rigidity through a frame structure combined with reinforcing ribs and full welding connections, which can withstand high-frequency or large-amplitude vibrations and effectively avoid self-resonance or deformation. The design of multiple weight-reducing holes (base plate, side plate, and upright plate) reduces the weight of the tooling without affecting the structural strength, and reasonably reduces the load on the test bench. The full-fit arrangement of the mounting holes on the base plate ensures the stability of the center of gravity, avoids additional vibrations caused by the shift of the center of gravity, and improves the test accuracy. The multiple second mounting holes on the upright plate can be adapted to silencers of different specifications, which is highly versatile. The robust connection structure (full welding and reinforcing ribs) can prevent the tooling from loosening and effectively protect the silencer and experimental equipment. Overall, it provides a stable and reliable fixing solution for silencer vibration experiments. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the installation of the muffler vibration test fixture proposed in this utility model;

[0020] Figure 2 An exploded view of the vibration test fixture for the muffler proposed in this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the muffler vibration test fixture proposed in this utility model;

[0022] Figure 4This is a schematic diagram of the reinforcing ribs in the vibration test fixture for the muffler proposed in this utility model.

[0023] In the figure: 1-base plate, 101-first mounting hole, 102-first weight reduction hole, 2-side plate, 201-second weight reduction hole, 202-third weight reduction hole, 3-top plate, 4-vertical plate, 401-second mounting hole, 402-fourth weight reduction hole, 5-silencer, 6-reinforcing rib. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figures 1-4 As shown, this embodiment provides a fixing fixture for a muffler vibration test, characterized in that it includes:

[0026] A base plate 1, wherein a plurality of first mounting holes 101 are provided on the base plate 1 for fixing the tooling to the vibration test bench;

[0027] A pair of side plates 2 are vertically fixed to the two opposite sides of the base plate 1 in a parallel and symmetrical manner;

[0028] The upright plate 4 is vertically fixed to the base plate 1, and its two sides are respectively fixedly connected to the inner sidewalls of the pair of side plates 2; the plate surface of the upright plate 4 is perpendicular to the plate surface of the side plates 2; the upright plate 4 is provided with a plurality of second mounting holes 401 for mounting the silencer 5 to be tested;

[0029] The top plate 3 is arranged parallel to the bottom plate 1 and is fixedly installed on the top of the pair of side plates 2 and the vertical plate 4, forming a rigid frame structure together with the bottom plate 1, the side plates 2 and the vertical plate 4.

[0030] Overall, it includes a base plate 1, a pair of side plates 2, a vertical plate 4, and a top plate 3.

[0031] The base plate 1 is made of steel plate with multiple first mounting holes 101 evenly distributed on it (the hole diameter is adapted to the fixing bolts of the vibration test bench). The base plate 1 is fixed to the test bench by bolts. A pair of side plates 2 are made of steel plates of the same size (the width is adapted to the base plate 1) and are symmetrically welded to the left and right sides of the base plate 1, with the plate surface perpendicular to the base plate 1. The upright plate 4 is made of steel plate of the same height as the side plates 2 and is vertically welded to the middle of the base plate 1. Its two sides are welded to the inner sidewalls of the two side plates 2 respectively. Multiple rows of second mounting holes 401 (2-4 holes per row, the hole diameter is adapted to the mounting bolts of the muffler 5) are distributed along the height direction on the upright plate 4 for fixing the muffler 5. The top plate 3 is made of steel plate of the same size as the base plate 1 and is welded to the top of the side plates 2 and the upright plate 4, forming a closed structure of "rectangular frame + longitudinal upright plate 4" with the base plate 1, side plates 2 and upright plate 4.

[0032] The rigid frame structure achieves high stability and can effectively resist lateral and longitudinal forces during vibration, avoiding tooling deformation or muffler displacement, and ensuring the accuracy of test data.

[0033] like Figures 1-3 As shown, in this embodiment, the base plate 1 is also provided with a plurality of first weight reduction holes 102. The plurality of first mounting holes 101 and the plurality of first weight reduction holes 102 are all distributed in a rectangular array, and the first mounting holes 101 are fully fitted so that the center of gravity of the tooling is centered.

[0034] Specifically, the base plate 1 has multiple first weight reduction holes 102, and the multiple first mounting holes 101 and the multiple first weight reduction holes 102 are arranged in a rectangular array, and the first mounting holes 101 are fully equipped.

[0035] The base plate 1 is fully equipped with multiple first mounting holes 101 arranged in a rectangular array, with the central area being the first weight reduction hole 102; the number and position of the first weight reduction hole 102 are designed to reduce the weight of the base plate 1 without affecting its strength.

[0036] The first weight-reducing hole 102 reduces the overall weight of the tooling (reduces the load on the test bench), while the full arrangement of the first mounting hole 101 ensures that the connection center of gravity between the base plate 1 and the test bench is centered, avoiding additional vibration caused by the offset of the center of gravity, and further improving the test accuracy.

[0037] like Figures 2-3 As shown, in this embodiment, a set of weight-reducing holes is provided on the surface of the side plate 2. The set of weight-reducing holes includes a second weight-reducing hole 201 located at the center of the plate surface and a plurality of third weight-reducing holes 202 arranged in the vertical direction.

[0038] The second weight-reducing hole 201 is a triangular hole, and its corners are rounded; the diameter of the plurality of third weight-reducing holes 202 gradually decreases in the direction away from the base plate 1.

[0039] Specifically, a set of weight-reducing holes is provided on the surface of the side plate 2, including a second weight-reducing hole 201 (triangular hole with rounded corners) located at the center of the plate surface and a plurality of third weight-reducing holes 202 arranged in the vertical direction (the hole diameter gradually decreases in the direction away from the bottom plate 1).

[0040] The second weight-reducing hole 201 is triangular with rounded corners to avoid stress concentration; the third weight-reducing hole 202 is arranged in multiples along the height of the side plate 2, and the hole diameter gradually decreases away from the bottom plate 1; adapting to the stress distribution of the side plate 2: the bottom bears the main weight of the tooling and muffler 5, and the larger hole diameter can reduce more weight; the top bears less stress, and the smaller hole diameter ensures rigidity.

[0041] By using rounded triangular holes and a third weight-reducing hole 202 with a gradually decreasing diameter, the weight of the side plate 2 is significantly reduced while maintaining structural strength and resistance to deformation, thus avoiding a decrease in rigidity due to excessive weight reduction.

[0042] like Figure 3 As shown, in this embodiment, a fourth weight-reducing hole 402 is provided on the surface of the upright plate 4.

[0043] Specifically, a fourth weight-reducing hole 402 is provided on the surface of the upright plate 4; the fourth weight-reducing hole 402 is provided in a non-stressed area on the upright plate 4 (such as between adjacent mounting hole rows), and is shaped as an oblong hole or a round hole.

[0044] Without affecting the fixing strength of the vertical plate 4 to the silencer 5, the overall weight of the tooling is further reduced, the load on the test bench is reduced, and the center of gravity shift caused by the excessive weight of the vertical plate 4 is avoided.

[0045] like Figure 4 As shown, in this embodiment, reinforcing ribs 6 are provided at the connection between the side plate 2 and the upright plate 4, and / or at the connection between the side plate 2 and the top plate 3.

[0046] Specifically, reinforcing ribs 6 are provided at the connection between the side plate 2 and the vertical plate 4, and at the connection between the side plate 2 and the top plate 3.

[0047] The reinforcing rib 6 is a triangular steel plate, with 2-3 welded at each connection point, and distributed at intervals along the length of the connection point; the right-angled sides of the reinforcing rib 6 are welded to the plate surfaces of the two connecting parts respectively to form a triangular support structure.

[0048] The reinforcing rib 6 can enhance the connection strength between the side plate 2 and the vertical plate 4, and between the side plate 2 and the top plate 3, so as to avoid deformation or breakage at the connection due to stress concentration during vibration, and improve the overall rigidity and service life of the tooling.

[0049] like Figure 3As shown, in this embodiment, the fixed connections between the base plate 1, the side plate 2, the upright plate 4, and the top plate 3 are all fully welded connections.

[0050] Specifically, the fixed connections between the base plate 1, side plate 2, vertical plate 4, and top plate 3 are all fully welded connections.

[0051] The welds at the joints of each component are continuous and without any incomplete welds, ensuring that the strength of the joint is consistent with that of the base material.

[0052] Full welding connections can maximize the rigidity of the connections between components, avoiding tooling deformation or muffler displacement caused by loose welding during vibration. It is especially suitable for harsh vibration experiments with high frequency and large amplitude, improving experimental safety.

[0053] Of course, those skilled in the art will recognize that this invention is not limited to the details of the exemplary embodiments described above, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0054] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0055] The technologies, shapes, and structures not described in detail in this utility model are all known technologies.

Claims

1. A fixture for a vibration test of a muffler, characterized in that, include: The base plate (1) has a plurality of first mounting holes (101) for fixing the tooling to the vibration test bench; A pair of side plates (2) are vertically fixed to the two opposite sides of the base plate (1) in a parallel and symmetrical manner; A vertical plate (4) is fixed vertically on the base plate (1), and its two sides are respectively fixedly connected to the inner sidewalls of the pair of side plates (2); the plate surface of the vertical plate (4) is perpendicular to the plate surface of the side plate (2); a plurality of second mounting holes (401) are provided on the vertical plate (4) for mounting the silencer (5) to be tested; The top plate (3) is arranged parallel to the bottom plate (1) and is fixedly installed on the top of the pair of side plates (2) and the vertical plate (4), together with the bottom plate (1), the side plates (2) and the vertical plate (4) to form a rigid frame structure.

2. The muffler vibration test fixture according to claim 1, characterized in that, The base plate (1) is also provided with a plurality of first weight reduction holes (102). The plurality of first mounting holes (101) and the plurality of first weight reduction holes (102) are arranged in a rectangular array, and the first mounting holes (101) are fully fitted so that the center of gravity of the tooling is centered.

3. The muffler vibration test fixture according to claim 1, characterized in that, The side plate (2) has a set of weight-reducing holes on its surface. The set of weight-reducing holes includes a second weight-reducing hole (201) located at the center of the plate surface and a plurality of third weight-reducing holes (202) arranged in the vertical direction.

4. The muffler vibration test fixture according to claim 3, characterized in that, The second weight-reducing hole (201) is a triangular hole, and its corners are rounded; the diameter of the plurality of third weight-reducing holes (202) gradually decreases in the direction away from the base plate (1).

5. The muffler vibration test fixture according to claim 1, characterized in that, The vertical plate (4) has a fourth weight-reducing hole (402) on its surface.

6. The muffler vibration test fixture according to claim 1, characterized in that, Reinforcing ribs (6) are provided at the connection between the side plate (2) and the vertical plate (4) and / or at the connection between the side plate (2) and the top plate (3).

7. The muffler vibration test fixture according to any one of claims 1-6, characterized in that, The fixed connections between the base plate (1), the side plate (2), the upright plate (4), and the top plate (3) are all fully welded connections.

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