Automatic rigidity detection equipment for lightweight ball head assembly

Abstract

The invention belongs to the technical field of ball head assembly detection, and particularly relates to an automatic rigidity detection device for a light-weight ball head assembly, and the device comprises a detection pedestal which is provided with a ball shaft cavity; a ball head shaft rotationally embedded in the ball shaft cavity is integrally formed at the bottom of the positioning base, a positioning tool is rotationally connected to the top of the positioning base, a spiral air cavity is formed in the connecting end of the positioning base and the positioning tool, and a spiral impeller embedded in the spiral air cavity is fixedly connected to the bottom end of the positioning tool in a sleeving mode; an air inlet channel, an air supply channel and a branch channel which are communicated with one another are formed between the positioning base and the positioning tool; and the pressing cylinder and the positioning base are coaxially arranged, and a positioning head used for pushing and positioning a workpiece to be detected is installed at the bottom end of the pressing cylinder in a sliding mode. According to the invention, downward pressure can be ensured to be vertically and uniformly applied to the ball head assembly, and the ball head assembly is driven to rotate and change the circumferential direction by utilizing airflow, so that the detection precision is improved, and the reliability of detection data is ensured.

Description

Technical Field

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

[0002] Stiffness detection is a key technology for evaluating the deformation resistance ability of materials or structures, and is widely used in fields such as construction, machinery, automobiles, aerospace, and medical devices. A ball head assembly (also known as a ball hinge assembly) is a key articulated component in an automotive suspension and steering system. Its core function is to achieve multi-angle rotation through a spherical connection, transmit power in different axial directions, and at the same time reduce vibration to ensure the smooth operation of the steering mechanism. Therefore, the stiffness of the ball head assembly has a great impact on its working performance, and it is necessary to perform stiffness detection on the ball head assembly during factory production to avoid defective products from flowing out.

[0003] Existing stiffness detection devices generally place the ball head assembly in a positioning tooling, and then use a cylinder to provide a vertical downward pressure to continuously press down. A displacement sensor is used to detect the deformation of the ball head assembly under the downward pressure to detect its stiffness. However, during the actual detection process, when the downward pressure cylinder applies a downward pressure to the ball head assembly, it is impossible to ensure that its downward pressure direction is stably perpendicular to the ball head assembly. Therefore, due to uneven downward pressure inclination, errors may occur in the stiffness detection.

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

[0005] The purpose of the present invention is to provide an automatic stiffness detection device for a lightweight ball head assembly, which can adjust the ball head assembly and the downward pressure to the same axis before the downward pressure is applied to the ball head assembly, ensure that the downward pressure is vertically and uniformly applied to the ball head assembly, and at the same time use air flow to drive the rotation of the ball head assembly to 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 specifically as follows: An automatic stiffness detection device for a lightweight ball head assembly, comprising: A detection base, on which a ball shaft cavity is provided; 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 tooling, and a swirling air cavity is formed at the connection end between the two. A spiral impeller embedded in the swirling air cavity is fixedly sleeved at the bottom end of the positioning tooling. An air inlet channel, an air supply channel, and a branch channel that communicate with each other are provided between the positioning base and the positioning tooling, and air is alternately exhausted between the air supply channel and the branch channel to change the rotation state of the positioning tooling. 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 installed at the bottom end of the pressing cylinder.

[0007] As a preferred solution, it further includes 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.

[0008] As a preferred solution, the pushing mechanism includes a horizontal cylinder fixedly installed on the frame, a vertical support fixedly installed at the power output end of the horizontal cylinder, a horizontal support fixedly installed on the vertical support, a micro cylinder fixedly installed on the horizontal support, and a swinging support arm rotatably connected to the power output end of the micro cylinder. The displacement sensor is fixedly installed at one end of the swinging support arm close to the positioning base, and the other end of the swinging support arm is rotatably connected to a crank rod slidably connected to the vertical support.

[0009] As a preferred solution, an adjustment gap is provided between the detection base and the positioning base. An installation hole is provided on the top surface of the positioning base, and a piezoelectric ceramic displacement driver for supporting the positioning base is vertically fixedly installed inside it to limit the positioning base after adjustment.

[0010] As a preferred solution, ventilation holes communicating with the air supply channel are circumferentially and arrayedly provided at the bottom of the workpiece accommodation cavity of the positioning tooling. The extension range of the ventilation holes is smaller than the bottom annular surface of the workpiece to be measured. The branch channel communicates with the swirling air cavity to blow air to the spiral impeller to drive the rotation of the positioning tooling. A gas pressure valve is provided between the air inlet channel and the branch channel.

[0011] As a preferred solution, side installation grooves are circumferentially and arrayedly provided on the side wall of the positioning tooling, and positioning pieces are embedded inside it. The positioning tooling is provided with air supply branch channels that communicate the side installation grooves with the air supply channel to limit the workpiece to be measured by pushing the positioning pieces through the air flow.

[0012] 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. The root of the side wall of the positioning piece is fixedly pasted on the inner wall of the side installation groove.

[0013] As a preferred solution, it further includes a driving mechanism for pushing the detection base and the positioning base to move, which includes a longitudinal cylinder fixedly installed on the frame and a driving track. A slider is slidably installed on the driving track, and a support seat is fixedly installed on the slider. The detection base is fixedly installed on the support seat. The power output end of the longitudinal cylinder is fixedly installed with a side push frame fixedly connected to the support seat to push the detection base and the positioning base to move along the driving track.

[0014] As a preferred solution, a positioning groove is formed on the bottom surface of the detection base, and a positioning cylinder is vertically arranged directly below the positioning groove. The power output end of the positioning cylinder is fixedly installed with a positioning bolt adapted to the positioning groove.

[0015] As a preferred solution, the bottom end of the positioning head is conical, and a rotating support seat slidably connected thereto is arranged between the positioning head and the inner wall of the pressing cylinder. The positioning head is rotatably connected to the rotating support seat. A hydraulic spring rod is fixedly embedded between the top end of the rotating support seat and the inner wall of the pressing cylinder. A pressing cylinder is vertically arranged directly above the pressing cylinder, and the pressing cylinder is fixedly installed at the power output end of the pressing cylinder.

[0016] The technical effects achieved by the present invention are as follows: By arranging a spherical shaft cavity and a spherical head shaft between the detection base and the positioning base for spherical shaft rotational connection, and at the same time arranging a positioning head to cooperate with it, during the vertical pressing process, the positioning head can be used to embed into the shaft hole of the spherical head assembly, so as to utilize the conical lateral thrust to make the spherical head assembly perpendicular to the pressing cylinder and the axis lines coincide. Furthermore, it is ensured that when the pressing cylinder presses down, the downward pressure can be vertically and evenly released on the spherical head assembly, ensuring the uniformity of its deformation, and further ensuring the accuracy of detection.

[0017] By arranging an air intake channel, an air supply channel and a branch channel between the positioning base and the positioning tooling, and at the same time fixedly installing a spiral impeller at the bottom end of the positioning tooling, air flow can be supplied through the air intake channel. Before the spherical head assembly is placed in the accommodating cavity of the positioning tooling, the air flow is discharged through the ventilation holes, and the accommodating cavity can be purged to avoid the influence of impurities such as particulate matter in the air on the placement of the spherical head assembly. After the spherical head assembly is placed in the accommodating cavity, the ventilation holes are blocked, and the air flow is blown through the branch channel to drive the spiral impeller to drive the positioning tooling and the spherical head assembly to rotate, so as to change the detection orientation and realize multiple detections. At the same time, during the rotation process, the positioning head can continuously maintain the positioning with the spherical head assembly, reducing the influence of the orientation adjustment on the detection, thereby further improving the detection accuracy.

[0018] In the present invention, by providing positioning pieces on the inner wall of the positioning tooling, after the ball head assembly is placed and positioned in the positioning tooling, the continuously supplied air flow can be utilized to gradually expand the positioning pieces to fit against the outer surface of the ball head assembly, further limiting it, preventing 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

[0019] Figure 1 FIG. 6 is a perspective structural view of the main body in an embodiment of the present invention; Figure 2 FIG. 9 is a front view of the main body in an embodiment of the present invention; Figure 3 FIG. 12 is a front sectional view of the main body in an embodiment of the present invention; Figure 4 FIG. 15 is a partial perspective structural view of the main body in an embodiment of the present invention; Figure 5 is the present invention Figure 4 side sectional view; Figure 6 FIG. 23 is a combined structural view of the detection base and the positioning base in an embodiment of the present invention; Figure 7 is the present invention Figure 6 exploded view; Figure 8 FIG. 31 is a perspective structural view of the positioning tooling provided in an embodiment of the present invention; Figure 9 is the present invention Figure 5 enlarged view of part B; Figure 10 is the present invention Figure 8 exploded view; Figure 11 FIG. 44 is a perspective structural view of the positioning piece in an embodiment of the present invention; Figure 12 is the present invention Figure 3 enlarged view of part A; Figure 13 FIG. 52 is an assembled structural view of the main body in an embodiment of the present invention.

[0020] In the drawings, the list of components represented by each reference numeral is as follows: 1. Detection base; 11. Ball shaft cavity; 12. Side push frame; 13. Positioning groove; 14. Positioning cylinder; 15. Positioning bolt; 16. Mounting hole; 17. Piezoelectric ceramic displacement driver; 18. Driving track; 19. Slide block; 110. Support seat; 111. Longitudinal cylinder; 2. Positioning base; 21. Ball head shaft; 22. Positioning tooling; 23. Helical impeller; 24. Air inlet passage; 25. Air supply passage; 26. Vent hole; 27. Gas pressure valve; 28. Branch passage; 29. Side mounting groove; 210. Air supply branch passage; 211. Positioning piece; 3. Pressing cylinder; 31. Positioning head; 32. Hydraulic spring rod; 33. Pressing cylinder; 34. Rotating support; 4. Displacement sensor; 41. Horizontal support; 42. Swinging arm; 43. Micro cylinder; 44. Crank rod; 45. Transverse cylinder; 46. Vertical support; 5. Ball head assembly. Detailed implementation manners

[0021] In order to make the purpose and advantages of the present invention clearer, the present invention will be specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific implementation manners of the present invention, and does not strictly limit the scope of protection specifically claimed by the present invention.

[0022] As Figures 1 - 13 shown, an automatic stiffness detection device for a lightweight ball head assembly includes a detection base 1, a positioning base 2 rotatably connected to the detection base 1, a pressing cylinder 3 coaxially arranged with the positioning base 2, and a displacement sensor 4 for detecting the deformation amount of the ball head assembly 5; and each component is installed at a relative position on the frame. After the ball head assembly 5 is placed in the positioning base 2 and combined with the pressing cylinder 3 for positioning, the pressing cylinder 3 is used to apply a downward pressure to make it deform, and the displacement sensor 4 is used to detect its deformation amount, so as to detect the stiffness state of the ball head assembly 5 and judge the quality of its quality.

[0023] Among them, specifically referring to the attached Figure 2 , a pressing cylinder 33 is vertically installed on the frame directly above the pressing cylinder 3 through a horizontal support plate, and the pressing cylinder 3 is fixedly installed at the power output end of the pressing cylinder 33, so that the pressing cylinder 33 vertically pushes the pressing cylinder 3 downward to provide a vertical downward pressure. At the same time, in order to ensure the stability of the downward pushing process, the power output end of the pressing cylinder 33 is provided with wing-shaped symmetric limiting plates, and two vertically sliding limiting columns are used to position the vertical movement of the pressing cylinder 3 to ensure the stability and accuracy of its vertical downward sliding.

[0024] Referring to the attached Figure 3 And Figure 7, a ball shaft cavity 11 is formed on the detection base 1, and a ball head shaft 21 integrally formed at the bottom of the positioning base 2 is rotatably embedded in the ball shaft cavity 11. Thus, by using the ball shaft rotation structure, the positioning base 2 can rotate significantly in three-dimensional space relative to the detection base 1, so that the three-dimensional angle of the positioning base 2 can be freely adjusted. Furthermore, after the ball head assembly 5 is placed in the accommodation cavity of the positioning base 2, the detection angle of the ball head assembly 5 can be synchronously adjusted to make it vertically opposite to the pressing cylinder 3, and the downward pressure is evenly released on the ball head assembly 5 to ensure the uniformity of its deformation, thereby ensuring the detection accuracy of the displacement sensor 4.

[0025] Refer to the appendix Figure 2 and Figure 3 , to ensure that the vertical central axes of the ball head assembly 5 and the pressing cylinder 3 coincide, a positioning head 31 is slidably installed at the bottom end of the pressing cylinder 3, and its bottom end is conical. In this way, when it pushes the workpiece to be measured through the pressing cylinder 33, by utilizing the hollow characteristic of the ball head assembly 5 and the conical structure characteristic of the positioning head 31, in the case where their vertical central axes do not coincide with each other, the conical inclined surface of the positioning head 31 gradually embeds into the hollow shaft cavity of the ball head assembly 5 under the action of the downward pressure. While generating a downward pressure on the ball head assembly 5, a lateral thrust is simultaneously generated to make the ball head assembly 5 rotate and displace in the direction coinciding with the central axis of the positioning head 31. Furthermore, by utilizing the rotational displacement of the positioning base 2 relative to the detection base 1, the position of the ball head assembly 5 is adjusted to make the vertical central axes of the ball head assembly 5 and the pressing cylinder 3 coincide, thereby realizing the pre-positioning of the ball head assembly 5.

[0026] Furthermore, refer to the appendix Figure 7 and Figure 9 , to ensure the stability of positioning, an adjustment gap is provided between the detection base 1 and the positioning base 2 to facilitate their relative movement. At the same time, an installation hole 16 is formed on the top surface of the positioning base 2, and a piezoelectric ceramic displacement driver 17 is vertically fixedly installed inside it. After the positioning base 2 is adjusted, the piezoelectric ceramic displacement driver 17 can extend and abut against the bottom surface of the positioning base 2, thereby limiting the positioning base 2 and maintaining its position stability during the detection process.

[0027] It should be noted that at least three groups of piezoelectric ceramic displacement drivers 17 are arranged in a circumferential array around the positioning base 2 to ensure stable support for the positioning base 2 in three-dimensional space. In this embodiment, four groups are arranged in a circumferential array to provide stable support in four directions, so as to stably support and limit the positioning base 2 and prevent displacement during the detection process.

[0028] Refer to the appendix Figure 3 , Figure 6 and Figure 7In order to enable multi-circular detection of the ball head assembly 5, a positioning tool 22 is rotatably connected to the top of the positioning base 2 through a sealed bearing; correspondingly, a rotating support 34 slidably connected to the positioning head 31 and the inner wall of the lower pressure cylinder 3 is provided, 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, so that after the positioning head 31 causes the ball head assembly 5 to contact and position with the positioning tool 22, it will compress the hydraulic spring rod 32 due to the action of the downward pressure and retract into the lower pressure cylinder 3, so that the downward pressure can be transmitted, and at the same time, the lower pressure cylinder 3 will not directly contact the ball head assembly 5, so that 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 with the lower pressure cylinder 3 when the positioning is completed, and will not affect the vertical positioning of the vertical center axis.

[0029] 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, thereby 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.

[0030] 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 fixture 22, and a spiral impeller 23 embedded in the cyclone cavity is fixedly sleeved at the bottom end of the positioning fixture 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 blow it to the surface of the spiral impeller 23. The airflow pushing force on the spiral impeller 23 is used to drive the positioning fixture 22 to rotate, and then drive the ball head assembly 5 thereon to rotate synchronously. At the same time, the airflow is discharged from the cyclone cavity from the exhaust hole at the other end after being blown, and then the continuous airflow is used to provide a driving force to push the ball head assembly 5 to rotate and adjust its circumferential angle.

[0031] Furthermore, the air intake channel 24 of the positioning base 2 continuously extends to the central axis position of the positioning tooling 22. A gas supply channel 25 communicating with it is opened on the central axis of the positioning tooling 22. At the same time, air vent holes 26 communicating with the gas supply channel 25 are circumferentially arrayed at the bottom of the accommodation cavity of the ball head assembly 5 on the positioning tooling 22. The extension range of the air vent holes 26 is smaller than the bottom annular surface of the ball head assembly 5. A gas pressure valve 27 is provided between the air intake channel 24 and the branch channel 28, and the required gas pressure threshold is set. In this way, when gas is transported through the air intake channel 24, it will first be transported into the accommodation cavity of the positioning tooling 22 through the gas supply channel 25 and the air vent holes 26 to remove impurities such as dust particles inside it, avoiding affecting the placement of the ball head assembly 5.

[0032] Secondly, after the ball head assembly 5 is placed into the accommodation cavity of the positioning tooling 22, since the ball head assembly 5 covers the air vent holes 26, it blocks them, and the air flow cannot pass through. Then, after positioning is completed, the air flow is guided towards the branch channel 28 direction. In this way, the air flow pressure can be used to continuously squeeze the gas pressure valve 27. After reaching the specified threshold, it enters the branch channel 28 through the gas pressure valve 27, and then the air flow is blown to the surface of the spiral impeller 23. The air flow pushing force on the spiral impeller 23 drives the positioning tooling 22 and the ball head assembly 5 thereon to rotate synchronously, thereby changing the flow direction and blowing state of the air flow according to the working steps.

[0033] Furthermore, side mounting grooves 29 are circumferentially arrayed on the side wall of the positioning tooling 22, and positioning pieces 211 are embedded inside it. At the same time, the positioning tooling 22 is provided with an air supply branch channel 210 connecting the side mounting groove 29 and the gas supply channel 25. Thus, during the process of squeezing and detecting the ball head assembly 5, due to the continuous downward pressure of the pressing cylinder 3 acting on the ball head assembly 5, the positioning tooling 22 cannot rotate. Then, when the air flow is blown to the surface of the spiral impeller 23, it cannot push it to rotate either, and the air flow cannot flow through the branch channel 28 and the gas supply channel 25. At this time, it can only flow into the air supply branch channel 210 through the air supply branch channel 210. Then, the blown air flow can be used to make the positioning pieces 211 expand and move outwards of the side mounting groove 29, making them contact the side of the ball head assembly 5 and squeezing and fitting against its side to limit the ball head assembly 5, so that it cannot have relative displacement 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 gas supply device detects this pressure and stops the gas supply, and then resumes the gas supply when needed.

[0034] It should be noted that the front side 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 as to form a sealed space in the side mounting groove 29 by using the side wall of the positioning piece 211. When inflating, it can expand by using the characteristics of the rubber material, so as to push out the metal hard part on the front side of the positioning piece 211 and abut against the side of the ball head assembly 5 to limit it.

[0035] Refer to the appendix Figure 4 For adjusting the longitudinal positions of the detection base 1 and the positioning base 2, a longitudinal cylinder 111 and a driving track 18 are fixedly installed on the frame. At the same time, a slider 19 is slidably installed on the driving track 18, and a support seat 110 is fixedly installed on the slider 19. By fixedly installing the detection base 1 on the support seat 110, and fixedly installing a side push frame 12 connected to the support seat 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 track 18 to move, so as to adjust the longitudinal position of the ball head assembly 5, making it more convenient to pick up and place, and at the same time, it can automatically return below the pressing cylinder 3 after placement.

[0036] Further, specifically refer to the appendix Figure 5 A positioning groove 13 is provided on the bottom surface of the detection base 1; correspondingly, 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. 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 the upward extension of the positioning cylinder 14 to position the detection base 1, so that it will not be displaced during the detection process, thereby ensuring the stability of the detection.

[0037] Refer to the appendix again Figure 4 The displacement sensor 4 can adopt a non-contact displacement sensor or a contact displacement sensor. In this embodiment, a contact displacement sensor is adopted. At the same time, two groups are horizontally arranged on both sides of the detection base 1, and a symmetrical structure is used to detect the deformation amount of the ball head assembly 5, so as to analyze its stiffness.

[0038] Among them, for the push displacement sensor 4 contact ball head assembly 5, a transverse cylinder 45 is fixedly installed on the frame. At the same time, a vertical support 46 is fixedly installed at the power output end of the transverse 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 rotatably connected to the power output end of the micro cylinder 43. Then, the displacement sensor 4 is fixedly installed at one end of the swing arm 42 close to the positioning base 2, and the other end of the swing arm 42 is rotatably connected to a crank rod 44 that is slidably connected to the vertical support 46. At the same time, one end of the swing arm 42 close to the ball head assembly 5 is rotatably connected to the protruding part of the horizontal support 41. The transverse cylinder 45 can be used to horizontally push the displacement sensor 4 along the upper surface of the support seat 110 close to the ball head assembly 5, and the micro cylinder 43 is used to extend upward, pushing the end of the swing arm 42 with the displacement sensor 4 fixed thereon to tilt downward and the other end to tilt upward, so as to stably press the displacement sensor 4 against the side of the ball head assembly 5 to complete the detection of it.

[0039] The working principle of the present invention is as follows: First, the air supply device is used to convey through the air supply channel 25 and the air vent 26 into the accommodation cavity of the positioning tooling 22 to remove dust particles and other impurities inside it. After that, the air supply is stopped. At the same time, the ball head assembly 5 is placed in the accommodation cavity of the positioning tooling 22 manually or by a robotic arm. Then, the longitudinal cylinder 111 is used to push the detection base 1 and the positioning base 2 along the driving track 18 to move, so as to adjust the ball head assembly 5 below the pressing cylinder 3, and the positioning cylinder 14 is used to extend upward to embed the positioning bolt 15 into the positioning groove 13 to position the detection base 1.

[0040] Secondly, the pressing cylinder 33 is used to push the conical inclined surface of the positioning head 31 to gradually embed into the hollow shaft cavity of the ball head assembly 5 to pre-position the ball head assembly 5. Then, continue to press down. After the pressing cylinder 3 presses down and contacts the ball head assembly 5 and the displacement sensor 4 detects once, the pressing cylinder 33 can be partially retracted to press down the pressing cylinder 3. While providing the positioning downward pressure of the pressing cylinder 33, it does not contact the ball head assembly 5, and the air supply device continues to supply air. The air enters the branch channel 28 through the gas pressure valve 27, and then the air flow is blown to the surface of the spiral impeller 23. The air flow 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 realize multiple detections.

[0041] Finally, during the process of using the horizontal cylinder 45 and the micro cylinder 43 to push the displacement sensor 4 for detection, the air supply device continuously supplies air, which flows into the air supply branch channel 210 through the air supply branch channel 210. Furthermore, the blowing air flow can be utilized to cause the positioning piece 211 to expand and move outward from the side installation groove 29, so that it abuts against the side surface of the ball head assembly 5, and is pressed and fitted against its side surface to limit the ball head assembly 5, making it impossible to have relative displacement during the pressing process. Thus, it is ensured that the detection data of the displacement sensor 4 is only the deformation displacement amount of the ball head assembly 5, guaranteeing the detection accuracy.

[0042] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention, unless otherwise specified and limited, are implemented according to the conventional means in the art.

Claims

1. An automated stiffness detection device for a lightweight ball head assembly, characterized in that, Including: A detection base (1) with a ball shaft cavity (11) formed thereon; A positioning base (2) integrally formed with a ball head shaft (21) at its bottom and rotatably embedded in the ball shaft cavity (11). A positioning tooling (22) is rotatably connected to the top of the positioning base (2), and a swirling air cavity is formed at their connection end. A spiral impeller (23) embedded in the swirling air cavity is fixedly sleeved at the bottom end of the positioning tooling (22). An air inlet channel (24), an air supply channel (25), and a branch channel (28) that communicate with each other are formed between the positioning base (2) and the positioning tooling (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 tooling (22); A pressing cylinder (3) coaxially arranged with the positioning base (2). A positioning head (31) for pushing and positioning a workpiece to be measured is slidably installed at the bottom end of the pressing cylinder (3).

2. The automated stiffness detection device for a lightweight ball head assembly according to claim 1, wherein: It further includes a displacement sensor (4) for detecting the deformation of the workpiece to be measured, which is arranged at the edge of the positioning base (2), and a pushing mechanism for pushing the displacement sensor (4).

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

4. The automated stiffness detection 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). An installation hole (16) is formed 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 it to limit the positioning base (2) after adjustment.

5. The automated stiffness detection device for a lightweight ball head assembly according to claim 1, characterized in that: Vent holes (26) communicating with the air supply channel (25) are circumferentially arranged at the bottom of the workpiece accommodating cavity of the positioning tooling (22). The extension range of the vent holes (26) is smaller than the bottom annular surface of the workpiece to be measured. The branch channel (28) communicates with the swirling air cavity to blow air to the spiral impeller (23) to drive the positioning tooling (22) to rotate. A gas pressure valve (27) is arranged between the air inlet channel (24) and the branch channel (28).

6. The automated stiffness detection device for a lightweight ball head assembly according to claim 1, characterized in that: Side installation grooves (29) are circumferentially arranged on the side wall of the positioning tooling (22), and positioning pieces (211) are embedded inside it. The positioning tooling (22) is provided with an air supply branch channel (210) connecting the side installation grooves (29) and the air supply channel (25) to push the positioning pieces (211) through air flow to limit the workpiece to be measured.

7. An automated stiffness detection device for a lightweight ball head assembly according to claim 6, characterized in that: The front surface 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).

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

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

10. The automated stiffness detection 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) slidably connected thereto is arranged between the inner wall of the pressing cylinder (3). The positioning head (31) is rotatably connected to the rotating support (34). A hydraulic spring rod (32) is fixedly embedded between the top end of the rotating support (34) and the inner wall of the pressing cylinder (3). A pressing cylinder (33) is vertically arranged directly above the pressing cylinder (3), and the pressing cylinder (3) is fixedly installed on the power output end of the pressing cylinder (33).

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