A ball pin bending test fixture

Abstract

This utility model discloses a ball pin bending test fixture, including a base, an mounting plate extending upward from one end of the base, a bushing for fixing the ball pin detachably mounted on the mounting plate, a through slot on the base, a dial indicator mounted within the slot, the measuring ball of the dial indicator extending upward through the base, a pressure head, which can be raised and lowered and positioned directly above the dial indicator, and a cover plate positioned on one side of the mounting plate; the bushing has a mounting hole that matches the outer wall of the ball pin, the mounting hole being conical. This utility model solves the problem that existing ball pin bending test fixtures often only fit one specification of ball pin. When testing ball pins of different sizes or models, the fixture must be changed, which not only increases costs but also reduces testing efficiency. Furthermore, existing bending tests often use L-shaped block fixtures that are not securely fixed, leading to inaccurate measurements.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts testing technology, specifically a ball pin bending test fixture. Background Technology

[0002] The ball joint bending test is a key functional test item for ball joints. It is mainly used to evaluate the bending load applied perpendicular to the axis of the ball joint under static (non-dynamic) conditions, simulating the stress state of a vehicle under extreme conditions, in order to assess its bending resistance and structural reliability. The main measurement parameters include: recording load-displacement curves, maximum bending strength, elastic deformation, or fracture point, etc.

[0003] Currently, bending tests on ball joint pins typically involve mounting the product under test onto an L-block, tightening it with nuts, and then performing a static pressure test using a material testing machine. However, during manual operation, the lack of a precise positioning device often makes it difficult to maintain ideal coaxiality between the indenter of the material testing machine and the center point of the ball joint, leading to positional misalignment. This misalignment causes the applied force to deviate from the center point, resulting in a systematic deviation in the final test data. Considering the differences in taper design, ball joint size, and rod diameter among different ball joint models, different types of L-block fixtures need to be designed. This not only increases testing costs but also reduces testing efficiency. Therefore, developing a new ball joint bending test fixture that can solve the above problems has significant practical significance and application value. Utility Model Content

[0004] This utility model provides a ball pin bending test fixture, which can solve the problem that the existing ball pin bending test fixtures can only be adapted to one specification of ball pin. When it is necessary to test ball pins of different sizes or models, the fixture must be changed, which not only increases the cost but also reduces the test efficiency. In addition, the existing bending test fixtures often use L-shaped block fixtures that are not firmly fixed, resulting in inaccurate measurements.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a ball pin bending test fixture, comprising a base, an mounting plate extending upward from one end of the base, a bushing for fixing the ball pin detachably mounted on the mounting plate, a through slot on the base, a dial indicator mounted within the slot, the measuring ball of the dial indicator extending upward through the base; a pressure head, which is vertically movable and positioned directly above the dial indicator; a cover plate, positioned on one side of the mounting plate; and a mounting hole on the bushing that matches the outer wall of the ball pin, the mounting hole being conical. The detachable design of the bushing facilitates its replacement, enabling the fixture to adapt to the testing requirements of ball pins of different specifications and types, reducing the time and cost of fixture replacement. When all components work together, the pressure head applies a bending load, the dial indicator measures the deformation in real time, and the base and mounting plate provide stable support.

[0006] As a supplement to the technical solution described in this utility model, the upper part of the base is provided with a through hole for the dial indicator measuring head to pass through, and threaded holes are provided on the front and rear sides of the through hole. Fasteners are screwed into the threaded holes and press against the dial indicator to fix the dial indicator on the base.

[0007] As a supplement to the technical solution described in this utility model, the lower end of the pressure head is provided with a snap-fit ​​groove that matches the ball head sidewall of the ball pin. The snap-fit ​​groove is perfectly matched with the shape of the ball head sidewall, and can tightly fit the ball head surface to form a stable contact interface.

[0008] As a supplement to the technical solution described in this utility model, the bushing includes a cylindrical mounting plate, and a connecting part is provided on one side of the mounting plate. The connecting part is frustoconical. The mounting plate provides a stable foundation for fixing the bushing to the mounting plate. The frustoconical structure of the connecting part matches the mounting groove on the mounting plate, which can realize the rapid and accurate positioning of the bushing.

[0009] As a supplement to the technical solution described in this utility model, the mounting plate is provided with a mounting groove that matches the connecting part. The shape and size of the mounting groove are perfectly matched with the frustoconical structure of the bushing connecting part. When the connecting part is embedded in the mounting groove, the tight fit between the mounting groove and the connecting part can accurately position the bushing and ensure that the bushing is accurately positioned on the mounting plate.

[0010] As a supplement to the technical solution described in this utility model, the pressure head is connected to a material testing machine, and the material testing machine applies a load perpendicular to the axis to the ball pin.

[0011] As a supplement to the technical solution described in this utility model, a nut is provided on one side of the cover plate, and the nut is threadedly connected to the ball pin, so that the ball pin is on the base through the cover plate and the nut.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The truncated cone-shaped connector and mounting groove design provide a more stable connection, ensuring the stability of the bushing during testing. This more reliably secures the ball pin, reducing shaking or displacement during the test. The nut on one side of the cover plate, threaded to the ball pin, provides additional axial fixing force, ensuring the ball pin remains stable during bending tests. The detachable bushing design makes changing ball pins of different specifications easier and faster, reducing test preparation time. This solution addresses the problem that existing ball pin bending test fixtures often only accommodate one type of ball pin. When testing different sizes or models of ball pins, the fixture must be changed, increasing costs and reducing testing efficiency. Furthermore, existing bending tests often use L-shaped block fixtures that are not securely fixed, leading to inaccurate measurements. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 These are three-dimensional structural diagrams of the present invention from different angles;

[0016] Figure 3 This is a front sectional view of the present invention;

[0017] Figure 4 This is a three-dimensional structural diagram of the base of this utility model;

[0018] Figure 5 This is a cross-sectional view of the base of this utility model;

[0019] Figure 6 This is a three-dimensional structural diagram of the pressure head of this utility model;

[0020] Figure 7 This is a three-dimensional structural diagram of the bushing of this utility model;

[0021] Figure 8 This is a cross-sectional view of the bushing of this utility model.

[0022] Figure label:

[0023] 1. Base; 11. Slot; 12. Through hole; 13. Threaded hole; 2. Dial indicator; 3. Pressure head; 31. Snap-fit ​​groove; 4. Bushing; 41. Mounting plate; 42. Connecting part; 43. Mounting hole; 5. Cover plate; 6. Ball pin; 7. Mounting plate; 71. Mounting groove; 8. Nut. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0025] The embodiments of this utility model relate to a ball pin bending test fixture, such as... Figure 1-8 As shown, the device includes a base 1, with a mounting plate 7 extending upward from one end of the base 1. The mounting plate 7 and the base 1 are integrally formed. A bushing 4 for fixing a ball pin 6 is detachably mounted on the mounting plate 7. The bushing 4 is made of Cr12MoV and undergoes heat treatment to ensure a hardness of HRC50 or higher. The base 1 has a through slot 11, which serves as the mounting space for a dial indicator 2 and also helps to reduce weight. The dial indicator 2 is installed in the slot 11, with its measuring ball head extending upward through the base 1. A pressure head 3 is also included, which can be raised and lowered on the dial indicator. Directly above 2; cover plate 5, which is located on one side of the mounting plate 7. Cover plate 5 is made of Cr12MoV and is heat-treated to ensure that the hardness reaches HRC50 or above; the bushing 4 is provided with mounting holes 43 that match the outer wall of the ball pin 6. The mounting holes 43 are conical. The detachable design of the bushing 4 facilitates the replacement of the bushing 4, so that the tooling can adapt to the test requirements of different specifications and types of ball pins, reducing the time and cost of tooling replacement. When the components work together, the pressure head 3 applies bending load, the dial indicator 2 measures the deformation in real time, and the base 1 and the mounting plate 7 provide stable support.

[0026] In this embodiment, as Figure 5 As shown, the upper part of the base 1 is provided with a through hole 12 for the measuring head of the dial indicator 2 to pass through. Threaded holes 13 are provided on the front and rear sides of the through hole 12. Fasteners are screwed into the threaded holes 13 and press against the dial indicator 2 to fix the dial indicator 2 on the base 1, preventing the dial indicator 2 from moving during the test.

[0027] In this embodiment, as Figure 6 As shown, the lower end of the pressure head 3 is provided with a snap-fit ​​groove 31 that matches the ball head sidewall of the ball pin 6. The snap-fit ​​groove 31 is perfectly matched with the shape of the ball head sidewall, and can fit tightly against the ball head surface to form a stable contact interface.

[0028] In this embodiment, as Figure 7 and Figure 8 As shown, the bushing 4 includes a cylindrical mounting plate 41. A connecting part 42 is provided on one side of the mounting plate 41. The connecting part 42 is frustoconical. The mounting plate 41 provides a stable foundation for fixing the bushing 4 to the mounting plate 7. The frustoconical structure of the connecting part 42 matches the mounting groove 71 on the mounting plate 7, which can realize the rapid and accurate positioning of the bushing 4.

[0029] In this embodiment, as Figure 4As shown, the mounting plate 7 is provided with a mounting groove 71 that matches the connecting part 42. The shape and size of the mounting groove 71 are perfectly matched with the frustoconical structure of the bushing connecting part 42. When the connecting part 42 is embedded in the mounting groove 71, the tight fit between the mounting groove 71 and the connecting part 42 can accurately position the bushing and ensure that the bushing 4 is accurately positioned on the mounting plate 7.

[0030] In this embodiment, as Figure 1 As shown, the pressure head 3 is connected to a material testing machine, which applies a load perpendicular to the axis to the ball pin 6.

[0031] In this embodiment, as Figure 2 As shown, a nut 8 is provided on one side of the cover plate 5. The nut 8 is threadedly connected to the ball pin 6, and the ball pin 6 is mounted on the base 1 through the cover plate 5 and the nut 8.

[0032] In this embodiment, as Figure 1 As shown, firstly, according to the specifications of the ball pin, select a suitable bushing 4. The conical mounting hole 43 of the bushing can fit tightly with the outer wall of the ball pin. Embed the frustoconical connecting part 42 of the bushing 4 into the mounting groove 71 of the mounting plate 7. Then install the cover plate 5 on one side of the mounting plate 7. The bolt passes through the mounting plate 41, and the mounting plate 7 is connected to the cover plate 5. Place the dial indicator 2 into the slot 11 of the base 1, so that the measuring ball head of the dial indicator 2 passes through the through hole 12 on the upper part of the base 1. Adjust the position of the dial indicator 2 so that the measuring ball head contacts the part to be measured of the ball pin 6. Then fix the dial indicator 2 through the threaded holes 13 on both sides of the through hole 12. One end of the ball pin 6 is inserted into the mounting hole 43 of the bushing 4, so that the ball head of the ball pin 6 is directly below the pressure head 3. The ball pin 6 is further axially fixed by the nut 8 connected to the thread on the ball pin 6 to prevent it from slipping out of the bushing during the test. At this time, the pressure head 3, the ball center of the pin 6, and the dial indicator 2 are coaxial. The material testing machine connected to the pressure head 3 is started, and the pressure head 3 is controlled to move downward. The snap-fit ​​groove 31 at the lower end of the pressure head 3 is tightly engaged with the side wall of the ball head of the ball pin 6. The material testing machine applies a load perpendicular to the axis to the ball pin 6, and the load-displacement curve, maximum bending strength, and fracture point location can be recorded. The elastic deformation of the ball pin 6 can be recorded by the dial indicator 2.

[0033] In this embodiment, as Figure 2As shown, when measuring ball pins of different specifications, it is necessary to replace the bushing 4 and pressure head 3 with different specifications. The snap-fit ​​groove 31 of the pressure head 3 matches the spherical surface of the new ball pin 6, and the bushing 4 matches the side wall of the new ball pin 6. Adjust the dial indicator 2 to a suitable position so that its measuring ball head contacts the part to be measured of the ball pin 6. Fix the ball pin 6 in the mounting hole 43 of the bushing 4, ensuring that the ball head of the ball pin 6 is directly below the pressure head 3. Adjust the pressure head 3 to an appropriate height so that the snap-fit ​​groove 31 at its lower end can contact the side wall of the ball head of the ball pin 6. Start the material testing machine to test the ball pin 6.

[0034] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0035] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A ball pin bend test fixture characterized by, include: A base (1) is provided with an mounting plate (7) extending upward from one end of the base (1). A bushing (4) for fixing a ball pin (6) is detachably provided on the mounting plate (7). A slot (11) is provided on the base (1) that runs through the front and back. A dial indicator (2) is provided in the slot (11). The measuring ball head of the dial indicator (2) extends upward through the base (1). The pressure head (3) is positioned directly above the dial indicator (2) and can be raised and lowered. A cover plate (5) is disposed on one side of the mounting plate (7); The bushing (4) is provided with a mounting hole (43) that matches the outer wall of the ball pin (6), and the mounting hole (43) is conical.

2. The ball and socket bend test fixture of claim 1, wherein: The upper part of the base (1) is provided with a through hole (12) for the measuring head of the dial indicator (2) to pass through, and threaded holes (13) are provided on the front and rear sides of the through hole (12).

3. The ball pin bend test fixture of claim 1, wherein: The lower end of the pressure head (3) is provided with a snap-fit ​​groove (31) that matches the ball head sidewall of the ball pin (6).

4. The ball and socket bend test fixture of claim 1, wherein: The bushing (4) includes a cylindrical mounting plate (41), and a connecting part (42) is provided on one side of the mounting plate (41). The connecting part (42) is frustoconical.

5. The ball and socket bend test fixture of claim 4, wherein: The mounting plate (7) is provided with a mounting groove (71) that matches the connecting part (42).

6. The ball and socket bend test fixture of claim 1, wherein: The pressure head (3) is connected to the material testing machine.

7. The ball and socket bend test fixture of claim 1, wherein: A nut (8) is provided on one side of the cover plate (5), and the nut (8) is threadedly connected to the fixing ball pin (6).

Images