An automated stiffness testing device for lightweight ball head assemblies

Abstract

The present invention belongs to the field of ball head assembly detection technology, and specifically relates to an automated stiffness detection device for a lightweight ball head assembly, comprising a detection base, on which a ball shaft cavity is provided; a positioning base, the bottom of which is integrally formed with a ball head shaft that is rotatably embedded in the ball shaft cavity, the top of the positioning base is rotatably connected to a positioning tool, and a cyclone cavity is formed at the connecting end of the two, the bottom end of the positioning tool is fixedly sleeved with a spiral impeller embedded in the cyclone cavity, and an air intake channel, an air supply channel and a branch channel that are interconnected are provided between the positioning base and the positioning tool; a lower pressure cylinder is coaxially arranged with the positioning base, and a positioning head for pushing and positioning a workpiece to be tested is slidably installed at the bottom end of the lower pressure cylinder. The present invention can ensure that downward pressure is applied vertically and evenly to the ball head assembly, and at the same time, the air flow is used to drive the ball head assembly to rotate and change the circumferential orientation, thereby improving the detection accuracy and ensuring the reliability of the detection data.

Description

Technical Field

[0001] The invention belongs to the technical field of ball head assembly detection, and particularly relates to an automated stiffness detection device for a lightweight ball head assembly. Background Art

[0002] Stiffness testing is a key technology for evaluating the ability of materials or structures to resist deformation. It is widely used in fields such as construction, machinery, automotive, aerospace, and medical devices. The ball joint assembly (also known as the ball hinge assembly) is a key articulated component in automotive suspension and steering systems. Its core function is to achieve multi-angle rotation through a spherical connection, transmitting power in different axial directions while reducing vibration and ensuring smooth operation of the steering mechanism. Therefore, the stiffness of the ball joint assembly has a significant impact on its performance. Stiffness testing of the ball joint assembly is required before shipment to prevent defective products.

[0003] Existing stiffness testing equipment typically tests the stiffness of a ball joint assembly by placing it in a positioning fixture, applying a vertical downward force with a pneumatic cylinder, and then using a displacement sensor to measure the displacement of the ball joint assembly during this downward pressure. However, during actual testing, the downward pressure applied by the pneumatic cylinder cannot guarantee a stable and perpendicular direction to the ball joint assembly. Consequently, uneven downward pressure can lead to errors in stiffness testing.

[0004] Secondly, during the detection process, the circumferential position of the ball head assembly needs to be constantly adjusted manually to improve the detection accuracy. However, manual adjustment not only affects efficiency, but also may increase errors, resulting in a decrease in detection accuracy, which is counterproductive. Summary of the Invention

[0005] The purpose of the present invention is to provide an automated stiffness testing device for a lightweight ball head assembly, which can adjust the ball head assembly and the downforce to the same axis before the downforce is applied to the ball head assembly, ensuring that the downforce is applied vertically and evenly on the ball head assembly. At the same time, the airflow is used to drive the ball head assembly to rotate and change the circumferential orientation, thereby improving the detection accuracy and ensuring the reliability of the detection data.

[0006] The technical solutions adopted by the present invention are as follows:

[0007] An automated stiffness testing device for a lightweight ball head assembly, comprising:

[0008] A detection base having a ball shaft cavity formed thereon;

[0009] The positioning base has a ball head shaft integrally formed at its bottom and rotatably embedded in the ball shaft cavity. The top of the positioning base is rotatably connected to a positioning tool, and a cyclone cavity is formed at the connecting end of the two. The bottom end of the positioning tool is fixedly sleeved with a spiral impeller embedded in the cyclone cavity. An air intake channel, an air supply channel and a branch channel that are interconnected are opened between the positioning base and the positioning tool, and exhaust is alternately discharged between the air supply channel and the branch channel to change the rotation state of the positioning tool;

[0010] The pressing cylinder is coaxially arranged with the positioning base, and a positioning head for pushing and positioning the workpiece to be measured is slidably mounted on the bottom end of the pressing cylinder.

[0011] As a preferred solution, it further comprises a displacement sensor for detecting the deformation of the workpiece to be measured, which is arranged at the edge of the positioning base, and a pushing mechanism for pushing the displacement sensor is provided.

[0012] As a preferred solution, the pushing mechanism includes a transverse cylinder fixedly mounted on a frame, a vertical support fixedly mounted on a power output end of the transverse cylinder, and a horizontal support fixedly mounted on the vertical support. A micro cylinder is fixedly mounted on the horizontal support, and a swing arm is rotatably connected to the power output end of the micro cylinder. The displacement sensor is fixedly mounted on one end of the swing arm close to the positioning base, and the other end of the swing arm is rotatably connected to a crank rod slidably connected to the vertical support.

[0013] As a preferred solution, an adjustment gap is set between the detection base and the positioning base, a mounting hole is opened on the top surface of the positioning base, and a piezoelectric ceramic displacement driver for supporting the positioning base is vertically fixed inside it to limit the positioning base after adjustment.

[0014] As a preferred solution, a circumferential array of air holes connected to the air supply channel is provided at the bottom of the workpiece accommodating chamber to be measured of the positioning fixture. The extension range of the air holes is smaller than the bottom annular surface of the workpiece to be measured. The branch channel is connected to the cyclone chamber to blow gas to the spiral impeller to drive the positioning fixture to rotate. A gas pressure valve is provided between the air inlet channel and the branch channel.

[0015] As a preferred solution, the side wall circular array of the positioning tooling is provided with side mounting grooves, and positioning plates are embedded therein. The positioning tooling is provided with an air supply branch connecting the side mounting grooves with the air supply channel, so as to push the positioning plates through airflow to limit the workpiece to be measured.

[0016] As a preferred solution, the front surface of the positioning piece is made of hard metal material, and the side wall is made of rubber material, and the root of the side wall of the positioning piece is fixedly adhered to the inner wall of the side mounting groove.

[0017] As a preferred solution, it also includes a driving mechanism for pushing the detection base and the positioning base to move, which includes a longitudinal cylinder fixedly mounted on a frame and a driving rail, a slider slidably mounted on the driving rail, and a support seat fixedly mounted on the slider, the detection base is fixedly mounted on the support seat, and a side push frame fixedly connected to the support seat is fixedly mounted on the power output end of the longitudinal cylinder to push the detection base and the positioning base to move along the driving rail.

[0018] As a preferred solution, a positioning groove is provided on the bottom surface of the detection base, a positioning cylinder is vertically arranged directly below the positioning groove, and a positioning bolt adapted to the positioning groove is fixedly installed on the power output end of the positioning cylinder.

[0019] As a preferred solution, the bottom end of the positioning head is conical, and a rotating support slidably connected to the inner wall of the lower pressure cylinder is provided between the positioning head, the positioning head is rotatably connected to the rotating support, and a hydraulic spring rod is fixedly embedded between the top of the rotating support and the inner wall of the lower pressure cylinder, and a lower pressure cylinder is vertically provided directly above the lower pressure cylinder, and the lower pressure cylinder is fixedly installed at the power output end of the lower pressure cylinder.

[0020] The technical effects achieved by the present invention are:

[0021] The present invention sets a ball shaft cavity between the detection base and the positioning base to connect the ball shaft with the ball head shaft for rotation, and sets a positioning head to cooperate with it. In this way, during the vertical downward pressing process, the positioning head can be embedded in the shaft hole of the ball head assembly, thereby utilizing the conical side thrust to keep the ball head assembly vertical to the downward pressing cylinder and coincide with the axis center lines, thereby ensuring that the downward pressure can be released vertically and evenly on the ball head assembly when the downward pressing cylinder is pressed down, ensuring the uniformity of its deformation, and thus ensuring the accuracy of the detection.

[0022] The present invention provides an air intake channel, an air supply channel and a branch channel between the positioning base and the positioning tooling, and fixes a spiral impeller at the bottom end of the positioning tooling, so that air flow can be supplied through the air intake channel. Before the ball head assembly is placed in the accommodating chamber of the positioning tooling, the air flow is discharged through the air vent, which can purge the accommodating chamber to prevent impurities such as particulate matter in the air from affecting the placement of the ball head assembly. After the ball head assembly is placed in the accommodating chamber, the air vent is blocked to blow it through the branch channel to the spiral impeller to drive the positioning tooling and the ball head assembly to rotate, so as to change the detection orientation and realize multiple detections. At the same time, the positioning head can continuously maintain its positioning with the ball head assembly during the rotation, reducing the influence of orientation adjustment on the detection, thereby further improving the detection accuracy.

[0023] The present invention provides a positioning piece on the inner wall of the positioning tooling. After the ball head assembly is placed in the positioning tooling and positioned, the continuously supplied airflow can be used to make the positioning piece gradually expand and fit onto the outer surface of the ball head assembly, thereby further limiting it and avoiding displacement during the detection process, thereby ensuring the stability of the ball head assembly during the detection process, improving the detection accuracy, and ensuring the reliability of the detection data. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the three-dimensional structure of the main body in an embodiment of the present invention;

[0025] Figure 2 is a front view of the main body in an embodiment of the present invention;

[0026] Figure 3 is a front cross-sectional view of the main body in an embodiment of the present invention;

[0027] Figure 4 is a schematic diagram of a partial three-dimensional structure of a main body in an embodiment of the present invention;

[0028] Figure 5 This invention Figure 4 A side sectional view of

[0029] Figure 6 Schematic diagram of the combined structure of the detection base and the positioning base in an embodiment of the present invention;

[0030] Figure 7 This invention Figure 6 Exploded diagram;

[0031] Figure 8 Schematic diagram of the three-dimensional structure of the positioning tool provided in an embodiment of the present invention;

[0032] Figure 9 This invention Figure 5 A magnified view of the part in middle B;

[0033] Figure 10This invention Figure 8 Exploded diagram;

[0034] Figure 11 1 is a schematic diagram of the three-dimensional structure of a positioning piece in an embodiment of the present invention;

[0035] Figure 12 This invention Figure 3 A magnified view of the part in the middle;

[0036] Figure 13 It is a schematic diagram of the assembly structure of the main body in an embodiment of the present invention.

[0037] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0038] 1. Detection base;

[0039] 11. Ball shaft cavity; 12. Side thrust frame; 13. Positioning groove; 14. Positioning cylinder; 15. Positioning bolt; 16. Mounting hole; 17. Piezoelectric ceramic displacement driver; 18. Drive rail; 19. Slider; 110. Support seat; 111. Longitudinal cylinder;

[0040] 2. Positioning base;

[0041] 21. Ball joint shaft; 22. Positioning fixture; 23. Spiral impeller; 24. Air inlet channel; 25. Air supply channel; 26. Air vent; 27. Gas pressure valve; 28. Branch channel; 29. Side mounting groove; 210. Air supply branch channel; 211. Positioning piece;

[0042] 3. Press down the cylinder;

[0043] 31. Positioning head; 32. Hydraulic spring rod; 33. Pressing cylinder; 34. Rotating support;

[0044] 4. Displacement sensor;

[0045] 41. Horizontal support; 42. Swinging support arm; 43. Micro cylinder; 44. Crank rod; 45. Horizontal cylinder; 46. Vertical support;

[0046] 5. Ball head assembly. DETAILED DESCRIPTION

[0047] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the following examples. It should be understood that the following text is only used to describe one or more specific embodiments of the present invention and does not strictly limit the scope of protection of the present invention.

[0048] like Figures 1-13As shown, an automated stiffness detection device for a lightweight ball head assembly comprises a detection base 1, a positioning base 2 rotatably connected to the detection base 1, a down-pressing cylinder 3 coaxially arranged with the positioning base 2, and a displacement sensor 4 for detecting the deformation of the ball head assembly 5; and each component is installed in a relative position on the frame. After the ball head assembly 5 is placed in the positioning base 2 and positioned in combination with the down-pressing cylinder 3, the downward pressure of the down-pressing cylinder 3 is used to deform it, and its deformation is detected by the displacement sensor 4, thereby detecting the stiffness state of the ball head assembly 5 and judging its quality.

[0049] Specifically, please refer to the attached Figure 2 A downward-pressing cylinder 33 is vertically mounted on the frame directly above the downward-pressing cylinder 3 via a horizontal support plate. The downward-pressing cylinder 3 is fixedly mounted to the power output end of the downward-pressing cylinder 33, thereby pushing the downward-pressing cylinder 3 vertically downward and providing vertical downward force. To ensure stability during the downward-pressing process, a symmetrical wing-shaped limit plate is provided at the power output end of the downward-pressing cylinder 33, and two vertically sliding limit struts are used to position the vertical movement of the downward-pressing cylinder 3, thereby ensuring stability and accuracy in its vertical descent.

[0050] Refer to the attached Figure 3 and Figure 7 A ball shaft cavity 11 is provided on the detection base 1, and a ball head shaft 21 is integrally formed at the bottom of the positioning base 2 and is rotatably embedded in the ball shaft cavity 11. The ball shaft rotation structure is utilized to enable the positioning base 2 to rotate significantly in three-dimensional space compared to the detection base 1, thereby being able to freely adjust the three-dimensional angle of the positioning base 2. After the ball head assembly 5 is placed in the accommodating cavity of the positioning base 2, the detection angle of the ball head assembly 5 can be synchronously adjusted so that it can be perpendicular to the lower pressure cylinder 3, and the downward pressure is evenly released on the ball head assembly 5, ensuring the uniformity of its deformation, thereby ensuring the detection accuracy of the displacement sensor 4.

[0051] Refer to the attached Figure 2 and Figure 3The cam 31 is pressed against the bottom of the cylinder 3 and the cam 32 is pressed against the top of the cylinder 3 to prevent the cam 31 from sliding against the top of the cylinder 3. The cam 31 is pressed against the bottom of the cylinder 3 to prevent the cam 31 from sliding against the top of the cylinder 3.

[0052] Further, see the attached Figure 7 and Figure 9 In order to ensure the stability of positioning, an adjustment gap is set between the detection base 1 and the positioning base 2 to facilitate the relative movement of the two. At the same time, a mounting hole 16 is opened on the top surface of the positioning base 2, and a piezoelectric ceramic displacement driver 17 is vertically fixed inside it. After the positioning base 2 is adjusted, the piezoelectric ceramic displacement driver 17 can extend and contact the bottom surface of the positioning base 2, thereby limiting the positioning base 2 and maintaining position stability during the detection process.

[0053] It should be noted that at least three groups of piezoelectric ceramic displacement actuators 17 are arranged in a circular array around the positioning base 2 to ensure stable support of the positioning base 2 in three-dimensional space. In this embodiment, four groups of circular arrays are provided to provide stable support in four directions, thereby stably supporting and limiting the positioning base 2 and preventing displacement during the detection process.

[0054] Refer to the attached Figure 3 、 Figure 6 as well as Figure 7The top of the positioning base 2 is connected to the positioning tool 22 by a sealed bearing; in order to enable the ball head assembly 5 to be multi-circularly detected, the top of the positioning base 2 is rotatably connected to the positioning tool 22 through a sealed bearing; oppositely, a rotating support 34 slidably connected thereto is provided between the positioning head 31 and the inner wall of the lower pressure cylinder 3, and the positioning head 31 is rotatably connected to the rotating support 34, and at the same time, a hydraulic spring rod 32 is fixedly embedded between the top of the rotating support 34 and the inner wall of the lower pressure cylinder 3. Therefore, after the positioning head 31 contacts and positions the ball head assembly 5 with the positioning tool 22, it will compress the hydraulic spring rod 32 due to the action of the downward pressure and retract it into the lower pressure cylinder 3, so that the downward pressure can be transmitted. At the same time, the lower pressure cylinder 3 will not directly contact the ball head assembly 5, and thus, under the action of the rotating structure of the positioning tool 22 and the positioning head 31, the ball head assembly 5 can rotate circumferentially compared to the lower pressure cylinder 3 when the positioning is completed, and will not affect the vertical positioning of the vertical central axis.

[0055] According to the above structure, after the pressing cylinder 3 is pressed down to contact the ball head assembly 5 and detected once by the displacement sensor 4, the pressing cylinder 33 can be used to partially retract the pressing cylinder 3. While providing the positioning downward pressure of the pressing cylinder 33, it does not contact the ball head assembly 5, so that the ball head assembly 5 can rotate, changing the detection orientation, and thus realizing multiple detections. At the same time, during the rotation process, the positioning head 31 can continue to maintain its positioning with the ball head assembly 5, reducing the influence of the orientation adjustment on the detection, thereby further improving the detection accuracy.

[0056] Please refer to the attached Figure 9 In this embodiment, in order to drive the ball head assembly 5 to rotate, a cyclone cavity is formed between the connecting ends of the positioning base 2 and the positioning tooling 22, and a spiral impeller 23 embedded in the cyclone cavity is fixedly sleeved on the bottom end of the positioning tooling 22. At the same time, an air intake channel 24 and a branch channel 28 that are interconnected are opened inside the positioning base 2. After the air intake channel 24 is connected to the air supply equipment, the air intake channel 24 can be used to convey the airflow into the cyclone cavity through the branch channel 28, and then blown to the surface of the spiral impeller 23. The airflow pushing force on the spiral impeller 23 is used to drive the positioning tooling 22 to rotate, and then drive the ball head assembly 5 thereon to rotate synchronously. At the same time, after the airflow is blown, it is discharged from the cyclone cavity from the exhaust hole at the other end, and then the continuous airflow is used to provide driving force to push the ball head assembly 5 to rotate and adjust its circumferential angle.

[0057] Furthermore, the air inlet channel 24 of the positioning base 2 continues to extend to the central axis position of the positioning tooling 22, and an air supply channel 25 connected to it is opened on the central axis of the positioning tooling 22. At the same time, a circumferential array of air vents 26 connected to the air supply channel 25 is opened on the bottom of the accommodating cavity of the ball head assembly 5 on the positioning tooling 22, and the extension range of the air vents 26 is smaller than the bottom annular surface of the ball head assembly 5. At the same time, a gas pressure valve 27 is provided between the air inlet channel 24 and the branch channel 28, and the required air pressure threshold is set. In this way, when gas is transported through the air inlet channel 24, it will first be transported to the accommodating cavity of the positioning tooling 22 through the air supply channel 25 and the air vents 26 to remove impurities such as dust particles inside it, so as to avoid affecting the placement of the ball head assembly 5.

[0058] Secondly, after the ball head assembly 5 is placed in the accommodating cavity of the positioning tool 22, the ball head assembly 5 covers the vent 26, thereby blocking it and preventing airflow from passing through. After the positioning is completed, the airflow is guided toward the branch channel 28. In this way, the airflow pressure can be used to continuously squeeze the gas pressure valve 27. After reaching the specified threshold, the airflow enters the branch channel 28 through the gas pressure valve 27, and then blows the airflow to the surface of the spiral impeller 23. The airflow pushing force on the spiral impeller 23 is used to drive the positioning tool 22 and the ball head assembly 5 thereon to rotate synchronously, thereby changing the flow direction and blowing state of the airflow according to the working steps.

[0059] Furthermore, the side wall of the positioning fixture 22 is provided with a side mounting groove 29 in a circumferential array, and a positioning piece 211 is embedded therein. At the same time, the positioning fixture 22 is provided with an air supply branch 210 that connects the side mounting groove 29 with the air supply channel 25. Therefore, during the extrusion test of the ball head assembly 5, the continuous downward pressure of the pressure cylinder 3 acts on the ball head assembly 5, making it impossible for the positioning fixture 22 to rotate, and then when the air flow is blown to the surface of the spiral impeller 23, it cannot push it to rotate, and the air flow cannot flow through the branch channel 28 and the air supply channel 25. At this time, it can only flow through The air flows into the air supply branch 210, and the blown air flow can be used to expand the positioning piece 211 and move it outside the side mounting groove 29, so that it contacts the side of the ball head assembly 5, and is squeezed and fitted on its side to limit the ball head assembly 5, so that it cannot move relatively during the squeezing process, thereby ensuring that the detection data of the displacement sensor 4 is only the deformation displacement of the ball head assembly 5, reducing the influence of variables and improving the detection accuracy; at the same time, after the gas pressure in the air intake channel 24 reaches the specified threshold, the air supply equipment detects the pressure and stops the air supply, and then resumes the air supply when needed.

[0060] It should be noted that the front of the positioning piece 211 is made of hard metal and the side wall is made of rubber. The root of the side wall of the positioning piece 211 is fixedly adhered to the inner wall of the side mounting groove 29, so that the side wall of the positioning piece 211 is used to form a closed space in the side mounting groove 29. When air is taken in, it can expand by utilizing the characteristics of the rubber material, thereby pushing out the metal hard part on the front of the positioning piece 211, pressing against the side of the ball head assembly 5 to limit it.

[0061] Refer to the attached Figure 4 In order to adjust the longitudinal position of the detection base 1 and the positioning base 2, a longitudinal cylinder 111 and a driving rail 18 are fixedly installed on the frame, and a slider 19 is slidably installed on the driving rail 18, and a support base 110 is fixedly installed on the slider 19. By fixing the detection base 1 on the support base 110, and fixing a side push frame 12 fixedly connected to the support base 110 at the power output end of the longitudinal cylinder 111, the longitudinal cylinder 111 can be used to push the detection base 1 and the positioning base 2 along the driving rail 18 to move, thereby adjusting the longitudinal position of the ball head assembly 5, making it more convenient to pick up and place, and it can automatically return to the bottom of the lower pressure cylinder 3 after placement.

[0062] For further details, please refer to the attached Figure 5 A positioning groove 13 is provided on the bottom surface of the detection base 1; oppositely, a positioning cylinder 14 is vertically arranged directly below the positioning groove 13, and a positioning bolt 15 adapted to the positioning groove 13 is fixedly installed at the power output end of the positioning cylinder 14. Therefore, after the ball head assembly 5 is placed inside the positioning tooling 22 and reset to the detection position, the positioning bolt 15 can be embedded into the positioning groove 13 by extending upward through the positioning cylinder 14, thereby positioning the detection base 1 so that it will not be displaced during the detection process, thereby ensuring the stability of the detection.

[0063] Refer again to the attached Figure 4 The displacement sensor 4 can be a non-contact displacement sensor or a contact displacement sensor. In this embodiment, a contact displacement sensor is used. At the same time, two groups are arranged laterally on both sides of the detection base 1. A symmetrical structure is used to detect the deformation of the ball head assembly 5, thereby analyzing its stiffness.

[0064] Among them, in order to push the displacement sensor 4 to contact the ball head assembly 5, a horizontal cylinder 45 is fixedly installed on the frame, and a vertical support 46 is fixedly installed on the power output end of the horizontal cylinder 45, and a horizontal support 41 is fixedly installed on the vertical support 46. A micro cylinder 43 is fixedly installed on the horizontal support 41, and a swing arm 42 is connected to the power output end of the micro cylinder 43. Then, the displacement sensor 4 is fixedly installed on one end of the swing arm 42 close to the positioning base 2, and the other end of the swing arm 42 is rotated. It is connected to the crank rod 44 that is slidably connected to the vertical support 46, and at the same time, the end of the swing arm 42 close to the ball head assembly 5 is rotatably connected to the raised part of the horizontal support 41; the displacement sensor 4 can be pushed laterally along the upper surface of the support seat 110 close to the ball head assembly 5 by the transverse cylinder 45, and the micro cylinder 43 is extended upward to push the swing arm 42 where the displacement sensor 4 is fixed to tilt downward and the other end to tilt upward, so that the displacement sensor 4 is stably pressed against the side of the ball head assembly 5 to complete its detection.

[0065] The working principle of the present invention is: first, use the air supply equipment to transport air into the accommodating cavity of the positioning tool 22 through the air supply channel 25 and the air vent 26 to remove impurities such as dust particles inside it, and then stop the air supply. At the same time, place the ball head assembly 5 in the accommodating cavity of the positioning tool 22 manually or by a mechanical arm, and then use the longitudinal cylinder 111 to push the detection base 1 and the positioning base 2 along the drive track 18 to move, so as to adjust the ball head assembly 5 to the bottom of the lower pressure cylinder 3, and use the positioning cylinder 14 to extend upward to embed the positioning bolt 15 into the positioning groove 13 to position the detection base 1.

[0066] Secondly, the conical inclined surface of the positioning head 31 is pushed gradually into the hollow shaft cavity of the ball head assembly 5 by the downward pressure cylinder 33 to pre-position the ball head assembly 5, and then the downward pressure is continued. After the downward pressure cylinder 3 is pressed down and contacts the ball head assembly 5 and is detected once by the displacement sensor 4, the downward pressure cylinder 33 can be used to partially retract the downward pressure cylinder 3. While providing the positioning downward pressure of the downward pressure cylinder 33, it does not contact the ball head assembly 5, and the air supply equipment is used to continuously supply air, which enters the branch channel 28 through the gas pressure valve 27, and then blows the air flow to the surface of the spiral impeller 23. The airflow pushing force on the spiral impeller 23 is used to drive the positioning tooling 22 and the ball head assembly 5 thereon to rotate synchronously, change the detection orientation, and thus achieve multiple detections.

[0067] Finally, in the process of using the transverse cylinder 45 and the micro cylinder 43 to push the displacement sensor 4 for detection, the air supply equipment continues to supply air, and the air flows into the air supply branch 210 through the air supply branch 210. Then, the blown air flow can be used to expand the positioning piece 211 and move it outside the side mounting groove 29, so that it contacts the side of the ball head assembly 5, and squeezes and fits on its side to limit the ball head assembly 5, so that it cannot move relatively during the extrusion process, thereby ensuring that the detection data of the displacement sensor 4 is only the deformation displacement of the ball head assembly 5, thereby ensuring the detection accuracy.

[0068] The foregoing is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained herein shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. An automated stiffness testing device for lightweight ball head assemblies, characterized in that: include: A detection base (1) having a ball shaft cavity (11) formed thereon; A positioning base (2) is integrally formed with a ball head shaft (21) at its bottom, which is rotatably embedded in the ball shaft cavity (11); a positioning fixture (22) is rotatably connected to the top of the positioning base (2), and a cyclone cavity is formed at the connecting end of the two; a spiral impeller (23) is fixedly sleeved on the bottom end of the positioning fixture (22) and is embedded in the cyclone cavity; an air intake channel (24), an air supply channel (25) and a branch channel (28) that are interconnected are provided between the positioning base (2) and the positioning fixture (22); and air is alternately exhausted between the air supply channel (25) and the branch channel (28) to change the rotation state of the positioning fixture (22); The pressing cylinder (3) is coaxially arranged with the positioning base (2), and a positioning head (31) for pushing and positioning a workpiece to be measured is slidably mounted on the bottom end of the pressing cylinder (3).

2. The automated stiffness testing device for a lightweight ball head assembly according to claim 1, characterized in that: It also includes a displacement sensor (4) for detecting the deformation amount of the workpiece to be measured, which is arranged on the edge of the positioning base (2) and is provided with a pushing mechanism for pushing the displacement sensor (4).

3. The automated stiffness testing device for a lightweight ball head assembly according to claim 2, characterized in that: The pushing mechanism comprises a transverse cylinder (45) fixedly mounted on a frame, a vertical support (46) fixedly mounted on a power output end of the transverse cylinder (45), and a horizontal support (41) fixedly mounted on the vertical support (46); a micro cylinder (43) fixedly mounted on the horizontal support (41), and a rotary swing arm (42) rotatably connected to the power output end of the micro cylinder (43); the displacement sensor (4) is fixedly mounted on one end of the rotary swing arm (42) close to the positioning base (2), and the other end of the rotary swing arm (42) is rotatably connected to a crank rod (44) slidably connected to the vertical support (46).

4. The automated stiffness testing device for a lightweight ball head assembly according to claim 1, characterized in that: An adjustment gap is provided between the detection base (1) and the positioning base (2), a mounting hole (16) is provided on the top surface of the positioning base (2), and a piezoelectric ceramic displacement driver (17) for supporting the positioning base (2) is vertically fixedly installed inside the detection base (1) to limit the positioning base (2) after adjustment.

5. The automated stiffness testing device for a lightweight ball head assembly according to claim 1, characterized in that: A circumferential array of air holes (26) connected to the air supply channel (25) is provided at the bottom of the workpiece accommodating chamber of the positioning fixture (22). The extension range of the air holes (26) is smaller than the bottom annular surface of the workpiece to be measured. The branch channel (28) is connected to the cyclone chamber to blow gas to the spiral impeller (23) to drive the positioning fixture (22) to rotate. A gas pressure valve (27) is provided between the air inlet channel (24) and the branch channel (28).

6. The automated stiffness testing device for a lightweight ball head assembly according to claim 1, characterized in that: The positioning fixture (22) is provided with a side mounting groove (29) in a circumferential array on the side wall, and a positioning piece (211) is embedded therein. The positioning fixture (22) is provided with an air supply branch (210) connecting the side mounting groove (29) with the air supply channel (25), so as to push the positioning piece (211) to limit the workpiece to be measured through air flow.

7. The automated stiffness testing device for a lightweight ball head assembly according to claim 6, characterized in that: The front side of the positioning piece (211) is made of a hard metal material, and the side wall is made of a rubber material. The root of the side wall of the positioning piece (211) is fixedly adhered to the inner wall of the side mounting groove (29).

8. The automated stiffness testing device for a lightweight ball head assembly according to claim 1, characterized in that: The invention also includes a driving mechanism for pushing the detection base (1) and the positioning base (2) to move, which includes a longitudinal cylinder (111) fixedly mounted on a frame and a driving rail (18), a slider (19) being slidably mounted on the driving rail (18), and a support base (110) being fixedly mounted on the slider (19), the detection base (1) being fixedly mounted on the support base (110), and a side push frame (12) fixedly connected to the support base (110) being fixedly mounted on the power output end of the longitudinal cylinder (111) to push the detection base (1) and the positioning base (2) to move along the driving rail (18).

9. The automated stiffness testing device for a lightweight ball head assembly according to claim 1, characterized in that: A positioning groove (13) is provided on the bottom surface of the detection base (1), a positioning cylinder (14) is vertically arranged directly below the positioning groove (13), and a positioning bolt (15) adapted to the positioning groove (13) is fixedly installed at the power output end of the positioning cylinder (14).

10. The automated stiffness testing device for a lightweight ball head assembly according to claim 1, characterized in that: The bottom end of the positioning head (31) is conical, and a rotating support (34) is provided between the positioning head (31) and the inner wall of the lower pressure cylinder (3) and is slidably connected thereto. The positioning head (31) is rotatably connected to the rotating support (34), and a hydraulic spring rod (32) is fixedly embedded between the top end of the rotating support (34) and the inner wall of the lower pressure cylinder (3). A lower pressure cylinder (33) is vertically provided directly above the lower pressure cylinder (3), and the lower pressure cylinder (3) is fixedly installed at the power output end of the lower pressure cylinder (33).

Images