Three-direction rigidity experiment device with preloading automobile lining

Abstract

The utility model discloses a three-direction rigidity experiment device with a preloaded automobile bushing, which relates to the technical field of automobile part experiment, and comprises two oppositely arranged support plates, a fixed seat and a central shaft, the fixing seat is arranged between the two supporting plates, a cavity used for containing an automobile lining is formed in the middle of the fixing seat, four first connecting holes are evenly distributed in the periphery of the fixing seat, and a plurality of second connecting holes are formed in the two side faces of the fixing seat. The center shaft penetrates through the automobile lining in the axial direction of the automobile lining. According to the utility model, one-way preloading can be realized so as to test rigidity in other directions, three-direction rigidity test of a product with a preloaded bushing can be realized on a single-shaft testing machine, the tool investment is low, the measurement precision is high, and the assembly is convenient.

Description

Technical Field

[0001] This utility model relates to the field of automotive component testing technology, specifically a three-dimensional stiffness testing device with a preloaded automotive bushing. Background Technology

[0002] The existing automotive bushing stiffness testing device has a relatively simple structure and can only perform three-dimensional (X / Y / Z) dynamic and static stiffness tests in a free state, but cannot perform three-dimensional (X / Y / Z) dynamic and static stiffness tests with preload requirements. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a three-dimensional stiffness testing device for automotive bushings with preload, which is mainly used for bushing products with unidirectional preload requirements to conduct dynamic and static stiffness tests in the X, Y, and Z directions.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a triaxial stiffness testing device with a preloaded automotive bushing, comprising two opposing support plates, a fixed seat, and a central shaft; the fixed seat is disposed between the two support plates, and a cavity for accommodating the automotive bushing is provided in the middle of the fixed seat, four first connecting holes are evenly distributed around the fixed seat, and several second connecting holes are provided on both sides of the fixed seat; the central shaft passes through the automotive bushing along its axial direction.

[0005] A further improvement is that: the upper end of the support plate is provided with a shaft hole, the lower end of the support plate is provided with a pad, and a reinforcing plate is provided between the pad and the support plate.

[0006] A further improvement is that the cross-section of the fixing seat is square, and four second connecting holes are provided, evenly distributed around the cavity.

[0007] A further improvement is that a limiting sleeve adapted to the automotive bushing is provided on the central shaft, and a first locking nut is provided at each end of the central shaft.

[0008] A further improvement is that the fixing seat is laterally positioned between the two support plates, and the two ends of the central shaft are respectively connected to the two support plates.

[0009] A further improvement is that: two fixing seats are provided and arranged side by side between two support plates; the central shaft passes through the two fixing seats and a limiting protrusion for separating the two fixing seats is provided in the middle of the central shaft; a first connecting plate and a top column are provided between the two fixing seats; the two ends of the first connecting plate are respectively connected to the first connecting holes of the two fixing seats; and the two ends of the top column are respectively connected to the second connecting holes of the two fixing seats.

[0010] A further improvement is that the fixing seat is positioned between the two support plates, and two of the first connecting holes of the fixing seat are respectively connected to the two support plates.

[0011] Further improvements are made in that: two fixed seats are provided and arranged side by side facing each other between the two support plates; the two first connecting holes of the two fixed seats facing away from each other are respectively connected to the two support plates; the two adjacent first connecting holes of the two fixed seats are connected by a top column; the remaining two pairs of first connecting holes of the two fixed seats are respectively connected by a first connecting plate; and the two ends of the two central shafts are respectively connected by a second connecting plate.

[0012] Further improvements include: first waist holes are provided at both ends of the first connecting plate, round holes are provided at both ends of the second connecting plate, second locking nuts are provided at both ends of the top column, and a reinforcing protrusion is provided in the middle of the top column.

[0013] A further improvement is that it also includes an adapter plate, both ends of which are provided with a second waist hole and a connecting block. One end of the connecting block is connected to the second connecting plate, and the other end of the connecting block is connected to the corresponding second waist hole.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. In this utility model, the preload force is applied by adjusting the distance between the mounting bases. The required adjustment distance is calculated based on the stiffness in the preload direction and the magnitude of the preload force to obtain the required displacement.

[0016] 2. In this utility model, the horizontal mounting method can effectively balance the eccentricity generated by the preload force.

[0017] 3. In this utility model, the triaxial stiffness test of products with preloaded bushings can be realized in a uniaxial testing machine. The tooling investment is small, the measurement accuracy is high, and the assembly is convenient.

[0018] 4. The method and apparatus used in this utility model can be applied to the experimental requirements of bushing products with similar requirements. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the triaxial stiffness test apparatus in Embodiment 1 of this utility model;

[0020] Figure 2 This is a side view of the triaxial stiffness test apparatus in Embodiment 1 of this utility model;

[0021] Figure 3 This is a top view of the triaxial stiffness test apparatus in Embodiment 1 of this utility model;

[0022] Figure 4 This is a schematic diagram of the support plate in Embodiment 1 of this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the fixing base in Embodiment 1 of this utility model;

[0024] Figure 6 This is a cross-sectional view of the triaxial stiffness test apparatus in Embodiment 2 of this utility model;

[0025] Figure 7 This is a side view of the triaxial stiffness test apparatus in Embodiment 2 of this utility model;

[0026] Figure 8 This is a top view of the triaxial stiffness test apparatus in Embodiment 2 of this utility model;

[0027] Figure 9 This is a schematic diagram of the central shaft in Embodiment 2 of this utility model;

[0028] Figure 10 This is a schematic diagram of the top column structure in Embodiment 2 of this utility model;

[0029] Figure 11 This is a schematic diagram of the structure of the first connecting plate in Embodiment 2 of this utility model;

[0030] Figure 12 This is a cross-sectional view of the triaxial stiffness test apparatus in Embodiment 3 of this utility model;

[0031] Figure 13 This is a side view of the triaxial stiffness test apparatus in Embodiment 3 of this utility model;

[0032] Figure 14 This is a top view of the triaxial stiffness test apparatus in Embodiment 3 of this utility model;

[0033] Figure 15 This is a cross-sectional view of the triaxial stiffness test apparatus in Embodiment 4 of this utility model;

[0034] Figure 16 This is a side view of the triaxial stiffness test apparatus in Embodiment 4 of this utility model;

[0035] Figure 17 This is a top view of the triaxial stiffness test apparatus in Embodiment 4 of this utility model;

[0036] Figure 18 This is a cross-sectional view of the triaxial stiffness test apparatus in Embodiment 5 of this utility model;

[0037] Figure 19 This is a side view of the triaxial stiffness test apparatus in Embodiment 5 of this utility model;

[0038] Figure 20 This is a top view of the triaxial stiffness test apparatus in Embodiment 5 of this utility model;

[0039] Figure 21 This is a schematic diagram of the structure of the second connecting plate in Embodiment 5 of this utility model;

[0040] Figure 22 This is a cross-sectional view of the triaxial stiffness test apparatus in Embodiment Six of this utility model;

[0041] Figure 23 This is a side view of the triaxial stiffness test apparatus in Embodiment Six of this utility model;

[0042] Figure 24 This is a top view of the triaxial stiffness test apparatus in Embodiment Six of this utility model;

[0043] Figure 25 This is a schematic diagram of the adapter plate in Embodiment Six of this utility model.

[0044] Figure label:

[0045] 1-Support plate; 11-Shaft hole; 12-Padded block; 13-Reinforcing plate;

[0046] 2-Fixed base; 21-Cavity; 22-First connecting hole; 23-Second connecting hole;

[0047] 3-Central shaft; 31-First locking nut; 32-Limit sleeve; 33-Limit protrusion;

[0048] 4-Top post; 41-Second locking nut; 42-Reinforcing protrusion;

[0049] 5-First connecting plate; 51-First waist hole;

[0050] 6-Second connecting plate; 61-Round hole;

[0051] 7-Adapter plate; 71-Second waist hole; 72-Connecting block. Detailed Implementation

[0052] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0053] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying 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. They should not be construed as limiting the specific protection scope of this utility model.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0055] The following description, in conjunction with the accompanying drawings, further illustrates specific embodiments of the present invention, making the technical solution and beneficial effects of the present invention clearer and more explicit. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0056] Example 1. Radial (X-direction) preload radial (X-direction) stiffness

[0057] See Figures 1-3 As shown, this utility model embodiment provides a triaxial stiffness test device with a preloaded automotive bushing, including two opposing support plates 1, a fixed seat 2, and a central shaft 3; in this embodiment, there is one fixed seat 2, which is laterally arranged between the two support plates 1, and the two ends of the central shaft 3 are respectively connected to the two support plates 1.

[0058] See Figure 5 As shown, the fixing seat 2 is positioned between the two support plates 1. A cavity 21 for accommodating the automotive bushing is located in the center of the fixing seat 2. The bushing is press-fitted into the fixing seat, mimicking the actual installation environment, thus ensuring more accurate experimental data. Four first connecting holes 22 are evenly distributed around the fixing seat 2, and several second connecting holes 23 are provided on both sides of the fixing seat 2. Specifically, the fixing seat 2 has a square cross-section, and four second connecting holes 23 are evenly distributed around the cavity 21. Threaded holes are machined on all four sides of the fixing seat to facilitate the connection and tightening of the pressure plate when performing stiffness tests in other directions after flipping it over.

[0059] The central shaft 3 extends through the automotive bushing along its axial direction. Specifically, the central shaft 3 is provided with a limiting sleeve 32 that is adapted to the automotive bushing, and the two ends of the central shaft 3 are respectively provided with a first locking nut 31.

[0060] See Figure 4 As shown, the upper end of the support plate 1 is provided with a shaft hole 11, the lower end of the support plate 1 is provided with a pad 12, and a reinforcing plate 13 is provided between the pad 12 and the support plate 1.

[0061] Example 2. Axial (Z-direction) preload and radial (X-direction) stiffness

[0062] See Figures 6-9 As shown, the structure of this embodiment is basically the same as that of embodiment one. The difference is that in this embodiment, there are two fixed seats 2 arranged side by side between the two support plates 1. The central shaft 3 passes through the two fixed seats 2, and the middle of the central shaft 3 is provided with a limiting protrusion 33 for separating the two fixed seats 2. A first connecting plate 5 and a top column 4 are provided between the two fixed seats 2. The two ends of the first connecting plate 5 are respectively connected to the first connecting holes 22 of the two fixed seats 2, and the two ends of the top column 4 are respectively connected to the second connecting holes 23 of the two fixed seats 2.

[0063] See Figure 10 As shown, the first connecting plate 5 has first waist holes 51 at both ends, which fully takes into account the influence of the movement of the preloaded fixing seat.

[0064] See Figure 11 As shown, a second locking nut 41 is provided at each end of the top column 4, and a reinforcing protrusion 42 is provided in the middle of the top column 4. The preload is applied by adjusting the top column thread between the fixed seats, combined with the calculated displacement.

[0065] Example 3. Axial (Z-direction) preload and radial (Y-direction) stiffness

[0066] See Figures 12-14 As shown, the structure of this embodiment is basically the same as that of embodiment two. The difference is that in this embodiment, the two fixed seats 2 are rotated horizontally by 90° and then fixed.

[0067] Example 4. Axial (Z-direction) Preload Axial (Z-direction) Stiffness

[0068] See Figures 15-17 As shown, this utility model embodiment provides a triaxial stiffness test device with a preloaded automotive bushing, including two opposing support plates 1, a fixed seat 2, and a central shaft 3; in this embodiment, there is one fixed seat 2, which is arranged in the forward direction between the two support plates 1, and two of the first connecting holes 22 of the fixed seat 2 are respectively connected to the two support plates 1.

[0069] See Figure 5As shown, the fixing seat 2 is disposed between the two support plates 1. The middle part of the fixing seat 2 is provided with a cavity 21 for accommodating the automotive bushing. Four first connecting holes 22 are evenly distributed around the fixing seat 2. Several second connecting holes 23 are provided on both sides of the fixing seat 2. Specifically, the fixing seat 2 has a square cross-section and four second connecting holes 23 are provided, which are evenly distributed around the cavity 21.

[0070] The central shaft 3 extends through the automotive bushing along its axial direction. Specifically, the central shaft 3 is provided with a limiting sleeve 32 that is adapted to the automotive bushing, and the two ends of the central shaft 3 are respectively provided with a first locking nut 31.

[0071] See Figure 4 As shown, the upper end of the support plate 1 is provided with a shaft hole 11, the lower end of the support plate 1 is provided with a pad 12, and a reinforcing plate 13 is provided between the pad 12 and the support plate 1.

[0072] Example 5. Radial (X-direction) preload and radial (Y-direction) stiffness

[0073] See Figures 18-20 As shown, the structure of this embodiment is basically the same as that of embodiment four. The difference is that in this embodiment, there are two fixed seats 2 arranged side by side in the front between the two support plates 1. The two first connecting holes 22 of the two fixed seats 2 facing away from each other are respectively connected to the two support plates 1. The two adjacent first connecting holes 22 of the two fixed seats 2 are connected by the top column 4. The remaining two pairs of first connecting holes 22 of the two fixed seats 2 are respectively connected by the first connecting plate 5. The two ends of the two central shafts 3 are respectively connected by the second connecting plate 6.

[0074] See Figure 10 As shown, the first connecting plate 5 has first waist holes 51 at both ends, which fully takes into account the influence of the movement of the preloaded fixing seat.

[0075] See Figure 11 As shown, a second locking nut 41 is provided at each end of the top column 4, and a reinforcing protrusion 42 is provided in the middle of the top column 4. The preload is applied by adjusting the top column thread between the fixed seats, combined with the calculated displacement.

[0076] See Figure 21 As shown, the two ends of the second connecting plate 6 are respectively provided with round holes 61.

[0077] Example 6. Radial (X-direction) preload axial (Z-direction) stiffness

[0078] See Figures 22-24 As shown, the structure of this embodiment is basically the same as that of embodiment five. The difference is that in this embodiment, the two fixed seats 2 are rotated horizontally by 90° and then fixed.

[0079] See Figure 25As shown, this embodiment also includes an adapter plate 7. Both ends of the adapter plate 7 are provided with a second waist hole 71 and a connecting block 72. One end of the connecting block 72 is connected to the second connecting plate 6, and the other end of the connecting block 72 is connected to the corresponding second waist hole 71, which fully takes into account the influence of the movement of the preload fixing seat.

[0080] This invention relates to a vertical uniaxial testing machine. For balanced preloading, a two-piece assembly method is used; the data obtained is divided by 2 to obtain the data for a single piece. First, the bushing to be tested is pressed into the fixed seat. Then, the fixed seat is fixed to the support plate via a central shaft (or a standard part). The support plate is fixed to the lower worktable of the testing equipment. The displacement obtained by preload calculation is adjusted by adjusting the top column to control the distance between the fixed seats, thus achieving the application of the preload. Finally, the preloaded fixed seat is connected to the worktable of the testing equipment using a fixed plate and an adapter plate, allowing for the conduct of relevant experiments. This invention achieves unidirectional preloading through the assembly of two bushings, thereby testing stiffness in other directions. It can perform three-dimensional stiffness testing of products with preloaded bushings on a uniaxial testing machine, requiring minimal tooling investment, offering high measurement accuracy, and facilitating assembly. After completing the stiffness test in one direction, the stiffness tests in the other two directions can be completed through tooling flipping and simple assembly. Utilizing a simple plate and shaft structure combination design, various experiments under complex experimental conditions can be performed on existing equipment.

[0081] In the description of this specification, references to terms such as "an embodiment," "preferred," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. Illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0082] Based on the above description of the structure and principle, those skilled in the art should understand that this utility model is not limited to the specific embodiments described above. Improvements and substitutions made using techniques known in the art based on this utility model all fall within the protection scope of this utility model and should be defined by the claims.

Claims

1. A triaxial stiffness testing device with a preloaded automotive bushing, comprising two opposing support plates (1), characterized in that: It also includes a fixed base (2) and a central shaft (3); The fixing seat (2) is disposed between two support plates (1). The middle part of the fixing seat (2) is provided with a cavity (21) for accommodating the car bushing. Four first connecting holes (22) are evenly distributed around the fixing seat (2). Several second connecting holes (23) are provided on both sides of the fixing seat (2). The central shaft (3) passes through the automotive bushing along the axial direction of the automotive bushing.

2. The triaxial rigidity experimental apparatus with preloaded automotive bushing according to claim 1, characterized in that: The upper end of the support plate (1) is provided with a shaft hole (11), the lower end of the support plate (1) is provided with a pad (12), and a reinforcing plate (13) is provided between the pad (12) and the support plate (1).

3. The triaxial rigidity experimental apparatus with preloaded automotive bushing according to claim 1, characterized in that: The fixed base (2) has a square cross-section, and four second connecting holes (23) are provided, which are evenly distributed around the cavity (21).

4. The triaxial rigidity testing apparatus with preloaded automotive bushing according to claim 1, characterized in that: The central shaft (3) is provided with a limiting sleeve (32) adapted to the automobile bushing, and the two ends of the central shaft (3) are respectively provided with a first locking nut (31).

5. The triaxial rigidity testing apparatus with preloaded automotive bushing according to claim 1, characterized in that: The fixed base (2) is laterally disposed between the two support plates (1), and the two ends of the central shaft (3) are respectively connected to the two support plates (1).

6. The triaxial rigidity experimental apparatus with preloaded automotive bushing according to claim 5, characterized in that: Two fixed seats (2) are provided and arranged side by side between two support plates (1). The central shaft (3) passes through the two fixed seats (2) and a limiting protrusion (33) for separating the two fixed seats (2) is provided in the middle of the central shaft (3). A first connecting plate (5) and a top column (4) are provided between the two fixed seats (2). The two ends of the first connecting plate (5) are respectively connected to the first connecting holes (22) of the two fixed seats (2), and the two ends of the top column (4) are respectively connected to the second connecting holes (23) of the two fixed seats (2).

7. The triaxial rigidity testing apparatus with preloaded automotive bushing according to claim 1, characterized in that: The fixing seat (2) is arranged in the front between the two support plates (1), and two of the first connecting holes (22) of the fixing seat (2) are respectively connected to the two support plates (1).

8. The triaxial rigidity experimental apparatus with preloaded automotive bushing according to claim 7, characterized in that: The fixed base (2) is provided in two pairs and is arranged side by side between the two support plates (1). The two first connecting holes (22) of the two fixed bases (2) facing away from each other are connected to the two support plates (1) respectively. The two adjacent first connecting holes (22) of the two fixed bases (2) are connected by the top column (4). The remaining two pairs of first connecting holes (22) of the two fixed bases (2) are connected by the first connecting plate (5) respectively. The two ends of the two central shafts (3) are connected by the second connecting plate (6) respectively.

9. The triaxial stiffness testing apparatus with preloaded automotive bushing according to claim 6 or 8, characterized in that: The first connecting plate (5) has a first waist hole (51) at both ends, the second connecting plate (6) has a round hole (61) at both ends, the top column (4) has a second locking nut (41) at both ends, and the top column (4) has a reinforcing protrusion (42) in the middle.

10. The triaxial rigidity testing apparatus with preloaded automotive bushing according to claim 8, characterized in that: It also includes an adapter plate (7), both ends of which are provided with a second waist hole (71) and a connecting block (72). One end of the connecting block (72) is connected to the second connecting plate (6), and the other end of the connecting block (72) is connected to the corresponding second waist hole (71).

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