Automatic ball head testing device and testing method

Abstract

The invention belongs to the technical field of ball head testing, and particularly relates to an automatic ball head testing device and a testing method. The testing device comprises a rack which is provided with an upper supporting table, a middle supporting table and a lower supporting table; the lower driving mechanism is arranged on the lower supporting table; the middle bearing mechanism is arranged on the middle supporting table; the upper driving mechanism is arranged on the upper supporting table; the lower gear motor is arranged at the lower end of the lower supporting table, and the driving end of the lower gear motor extends to the upper end of the lower supporting table; the upper driving disc is arranged at the upper end of the lower supporting table and is driven by a lower gear motor to rotate; the upper placement seat is detachably arranged on one side of the upper driving disc, is used for placing a to-be-tested spherical shell and a to-be-tested spherical pin, and is provided with a through hole through which the spherical pin extends out and can swing; the ball pin is driven by the lower driving mechanism and the upper driving mechanism to rotate and swing regularly, and the ball pin is pressed or stretched by the middle bearing mechanism, so that the wear resistance of the ball pin and the ball shell can be tested.

Description

Technical Field

[0001] The invention belongs to the technical field of ball head testing, and in particular relates to an automatic ball head testing device and a testing method. Background Art

[0002] Ball pins are widely used in independent suspension systems. Control arms or thrust rods are often connected to other components through ball pins at the ends. The main function of the ball pins is to enable the wheels to bounce up and down and turn.

[0003] The ball stud will be subjected to tensile or extrusion forces during operation, and will swing or rotate at a certain angle. During this process, the ball stud will produce friction with the ball shell. Due to the influence of the product's surface smoothness, strength or surface treatment effect, the wear resistance of ball heads from different batches is slightly different. If the wear resistance is poor, it will easily cause wear of the ball stud or the ball shell. Therefore, it is necessary to carry out a wear resistance test on the processed ball stud and ball shell to ensure the qualified rate of ball heads leaving the factory. Summary of the invention

[0004] The purpose of the present invention is to provide a testing device and a testing method which can automatically test the wear resistance of the ball pin and the ball shell in the ball head in view of the above-mentioned technical problems.

[0005] In view of this, the present invention provides a ball head automatic testing device, comprising: A frame having an upper support platform, a middle support platform and a lower support platform; A lower driving mechanism is arranged on the lower supporting platform; The middle receiving mechanism is arranged on the middle supporting platform; An upper driving mechanism is arranged on the upper supporting platform; The lower driving mechanism includes: A lower reduction motor is arranged at the lower end of the lower support platform and a driving end thereof extends to the upper end of the lower support platform; An upper driving plate is arranged at the upper end of the lower supporting platform and is driven to rotate by a lower reduction motor; An upper placement seat is detachably arranged on one side of the upper driving disk, used for placing the ball shell and ball pin to be tested, and is formed with a through hole for the ball pin to extend out and swing; The middle receiving mechanism is used to connect the upper driving mechanism and the ball pin to be tested placed on the upper mounting seat, and can apply axial pressure or stretch to the ball pin to be tested; the lower driving mechanism drives the ball shell and the ball pin to be tested to revolve regularly along the center of the upper driving disk, and the upper driving mechanism drives the ball pin to be tested to rotate along its own central axis through the cooperation of the middle receiving mechanism.

[0006] In the above technical solution, further, the upper driving mechanism includes: An upper reduction motor is arranged at the upper end of the upper support platform, and a driving end thereof extends to the lower end of the upper support platform; One end of the universal coupling is connected to the driving end of the upper reduction motor, and the other end is connected to one end of the middle receiving mechanism.

[0007] In the above technical solution, further, the central undertaking organization includes: The receiving platform is arranged on the middle supporting platform, and a mounting hole connected to the middle supporting platform is formed in the middle of the middle supporting platform; A receiving seat is freely rotatably arranged on the receiving platform; An adjusting receiving rod is arranged on the receiving seat and is radially fixedly connected to the receiving seat; The receiving platform includes: Two receiving shells are symmetrically arranged on the middle support platform and fixed by bolts; The support hole is spherical, formed between the two receiving shells, with the receiving shells extending from both ends, and is coaxially arranged with the upper driving disk; The receiving seat is arranged in the supporting hole, and the middle receiving mechanism is respectively connected to the ball pin to be tested and the universal coupling in the upper driving mechanism by adjusting the two ends of the receiving rod.

[0008] In the above technical solution, further, the receiving seat includes: The receiving block is in the shape of a ladder with small ends and a large middle part, and the two ends are vertical step surfaces, and the middle part of the outer wall is spherical; Two end pressure blocks are respectively arranged on the stepped surfaces at both ends of the receiving block, and the outer walls are formed into arc-shaped surfaces smoothly connected to the spherical surface in the middle of the outer wall of the receiving block; A plurality of receiving grooves are evenly distributed along the circumference and formed at the connection between the end faces of the receiving block and the end pressing block, and extend out of the outer walls of the end pressing block and the receiving block, and the receiving grooves are spherical; A plurality of receiving bodies are respectively and freely rotatably arranged in each receiving groove; The receiving hole is coaxially arranged on the receiving block and passes through the end pressure blocks at both ends for the adjustment of the receiving rod.

[0009] In the above technical solution, further, the receiving seat also includes: Two end positioning pieces are arranged in the receiving hole symmetrically with each other. A middle support member is arranged in the receiving hole and is located between the two end positioning members; End locators include: An end positioning block is coaxially arranged in the receiving hole and is matched with the receiving hole in radial limiting manner; An end positioning ring is coaxially arranged on the end positioning block and has a positioning hole penetrating the end positioning block formed in the middle; Among them, the receiving hole is in a stepped shape with small ends and a large middle part, and the hole part with a small diameter is coaxially formed on the end pressure block. The cross-section of the receiving hole located in the receiving block is a regular polygon, and the end positioning block is a regular polygon that is adapted and slidable therewith; the positioning hole is a regular polygon, and the adjusting receiving rod passes through the positioning holes of the two end positioning parts and cooperates with the radial limit of the positioning hole; and the end positioning blocks are extended from both ends of the adjusting receiving rod, and the two ends are respectively cooperated with the axial limit of the end positioning blocks at the end where they are located.

[0010] In the above technical solution, further, adjusting the receiving rod includes: The outer rod body has an outer wall in the shape of a regular polygon, adapted to the positioning hole, and a penetrating inner extrusion hole is coaxially arranged in the middle; An upper gland is detachably fixed to one end of the outer rod body and closes the end of the outer rod body, and an upper limit edge is formed on the outer edge thereof to abut against the outer end surface of the end positioning block in one of the end positioning members; A lower pressure cover is detachably fixed to the other end of the outer rod body, and is formed with a through extension hole, and an outer edge is formed with a lower limit edge that abuts against the outer end surface of the end positioning block in the other end positioning member; The inner rod body is coaxially arranged on the outer rod body, and one end of the inner rod body extends out of the outer rod body through the extension hole; An inner support member is fixedly arranged on one end of the inner rod body located inside the outer rod body and is radially limitedly matched with the inner extrusion hole; Two end floating positioning members are arranged in the inner extrusion hole and are respectively arranged at two ends of the inner support member; The inner extrusion hole is provided with hydraulic chambers at the ends of the two end floating positioning members respectively away from the inner support member; the ball pin to be detected is connected to the end of the inner rod body through a connector, and the upper driving mechanism is transmission-connected to the upper pressure cover.

[0011] In the above technical solution, further, the inner rod body includes: The outer rod portion is cylindrical and extends out of the outer rod body; The inner rod portion is in the shape of a regular polygon and is integrally formed with the outer rod portion; A connecting portion is formed integrally with the inner rod portion and is formed with a connecting external thread; The radial limit of the inner support is arranged on the inner rod part, and the axial limit is performed by a limit block which is threadedly matched with the connecting part.

[0012] In the above technical solution, further, the inner support member includes: The lower receiving ring has a regular polygonal hole formed on the inner side thereof for radial limiting cooperation with the inner rod portion, and a plurality of limiting teeth evenly distributed along the circumference formed on the outer side thereof; The middle receiving ring is sleeved on the inner rod and has a clearance fit with the inner rod. A plurality of positioning teeth evenly distributed along the circumference are formed on the outer wall of the middle receiving ring. A sunken groove is formed at one end of the lower receiving ring. A limiting groove matching the limiting teeth is formed on the side wall of the groove. The outer receiving ring is sleeved on the inner rod, and its outer wall is a regular polygon, and a matching groove that is slidably matched with the middle receiving ring is formed at one end close to the middle receiving ring, and a positioning groove that is matched with the positioning tooth and slidably matched is formed on the side wall of the matching groove, a protruding positioning part is formed in the middle of the matching groove, a regular polygonal connecting hole that penetrates the outer receiving ring and is radially limited with the inner rod is formed in the middle of the positioning part, and a protruding force-bearing part is formed at one end away from the middle receiving ring; An inner floating support member is sleeved on the inner rod portion and has one end clamped on the positioning portion and the other end abutting against the middle receiving ring; A regular polygonal transmission hole is formed in the middle of the inner extrusion hole to match the outer receiving ring, and the lower receiving ring and the force-bearing part at both ends of the inner floating support part partially extend out of the transmission hole.

[0013] In the above technical solution, further, the end floating positioning member includes: An inner sealing contact block is arranged on the inner rod body and is in contact with the inner support member; An outer extrusion block is disposed on a side of the inner sealing contact block away from the inner support member and abuts against the inner sealing contact block; An outer support member is arranged in the outer rod body, and one end of the outer support member abuts against the outer extrusion block, and the other end abuts against the upper gland or the lower gland; The outer extrusion block and the inner sealing contact block in the end floating positioning member on the side of the lower pressure cover are both sleeved on the inner rod body, and are respectively slidably matched with the inner rod body and the inner extrusion hole on that side; the inner sealing contact block in the end floating positioning member on the side of the upper pressure cover is slidably matched with the connecting part at the end of the inner rod body, and the outer extrusion block and the inner sealing contact block are respectively slidably matched with the inner extrusion hole on that side.

[0014] The beneficial effects of the present invention are: 1. The test device drives the ball pin to rotate and swing regularly through the lower driving mechanism and the upper driving mechanism, and presses or stretches the ball pin through the middle receiving mechanism, so as to test the wear resistance of the ball pin and the ball shell, and the tensile strength of the ball pin as a whole; 2. The test device can ensure the stability of the device operation and the test effect through the setting of the middle receiving mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the first viewing angle of the present invention; Figure 2 It is a structural schematic diagram of the second viewing angle of the present invention; Figure 3It is a schematic diagram of the connection between the middle receiving mechanism and the test part in the present invention; Figure 4 It is a cross-sectional schematic diagram of the middle receiving mechanism in the present invention; Figure 5 It is a schematic diagram of the structure of the receiving seat and the adjusting receiving rod in the present invention; Figure 6 It is a schematic diagram of the structure of the middle end positioning member and the adjustment receiving rod in the present invention; Figure 7 It is a structural schematic diagram of the adjusting receiving rod in the present invention; Figure 8 It is a schematic diagram of the structure of the inner rod body and the inner support member in the present invention; The markings in the figure are as follows: 1-upper support platform, 2-middle support platform, 3-lower support platform, 4-lower reduction motor, 5-upper drive plate, 6-upper placement seat, 7-upper reduction motor, 8-universal coupling, 9-receiving shell, 10-support hole, 11-receiving block, 12-end pressure block, 13-receiving body, 14-receiving hole, 15-end positioning piece, 15a-end positioning block, 15b-end positioning ring, 16-outer rod body, 17-inner extrusion hole, 18-upper pressure cover, 18a-upper limit edge, 19-lower pressure cover, 19a-lower limit edge, 20-inner rod body, 20a-outer rod part, 20b-inner rod part, 20c-connecting part, 21-lower receiving ring, 21a-limiting teeth, 22-middle receiving ring, 22a-positioning teeth, 23-outer receiving ring, 23a-positioning part, 24-inner floating support, 25-inner sealing contact block, 26-outer extrusion block, 27-outer support, 28-middle support, 29-limiting block. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0017] Embodiment 1: This embodiment provides a ball head automatic testing device, comprising: A frame having an upper support platform 1, a middle support platform 2 and a lower support platform 3; The lower driving mechanism is arranged on the lower supporting platform 3; The middle receiving mechanism is arranged on the middle supporting platform 2; The upper driving mechanism is arranged on the upper supporting platform 1; The lower driving mechanism includes: A lower reduction motor 4 is arranged at the lower end of the lower support platform 3 and a driving end thereof extends to the upper end of the lower support platform 3; The upper driving plate 5 is arranged at the upper end of the lower supporting platform 3 and is driven to rotate by the lower reduction motor 4; An upper placement seat 6 is detachably arranged on one side of the upper driving disk 5, and is used to place the ball shell and the ball pin to be tested, and is formed with a through hole for the ball pin to extend out and swing; The middle receiving mechanism is used to connect the upper driving mechanism and the ball pin to be tested placed on the upper mounting seat 6, and can apply axial pressure or stretch to the ball pin to be tested; the lower driving mechanism drives the ball shell and the ball pin to be tested to revolve regularly along the center of the upper driving disk 5, and the upper driving mechanism drives the ball pin to be tested to rotate along its own central axis through the cooperation of the middle receiving mechanism.

[0018] In the technical solution, the upper support platform 1, the lower support platform 3 and the middle support platform 2 are all fixedly arranged on the frame. The lower driving mechanism drives the upper driving disk 5 to rotate through the lower reduction motor 4, and since the upper placement seat 6 is fixed on one side of the upper driving disk 5 and is not located in the middle of the upper driving disk 5, the upper placement seat 6 rotates regularly along the central axis of the upper driving disk 5, thereby driving the ball pin and the ball shell fixed on the upper placement seat 6 to revolve.

[0019] The middle receiving mechanism is located just above the middle of the upper drive disk 5, so that the ball pin fixed between the upper placement seat 6 and the middle receiving mechanism is tilted and rotates and swings regularly during the rotation of the upper drive disk 5; and the upper drive mechanism drives the ball pin to rotate along its own central axis through the receiving mechanism of the middle receiving mechanism, thereby simulating the working environment of the ball head fixed on the control arm. The ball pin is pressed or stretched by the middle receiving mechanism to simulate the multiple force conditions in the work of the ball pin, and the wear test between the ball head and the ball shell of the ball head pin is carried out by rotating, swinging, stretching or pressing, so as to better obtain the wear resistance of the ball head as a whole. Through the setting of the middle receiving mechanism, the ball pin as a whole can also be stretched or pressed for endurance test. The middle receiving mechanism is hydraulically driven to press or stretch the ball pin to be tested.

[0020] In order to facilitate the fixation of the ball head, the upper placement seat 6 can be composed of a base connected to an upper cover, one end of the base has a flange, and the other end is formed with a chamber for placing the ball shell. The upper cover is threadedly connected to the base, and a through hole is formed on the upper cover. The size of the upper placement seat 6 is determined according to the size of the ball head to be tested, so as to meet the testing of ball heads of different sizes and specifications.

[0021] The device also includes a control cabinet, which has a control circuit composed of a controller, a contactor and a relay, and the electrical components in the device are all programmed and controlled by the controller.

[0022] Embodiment 2: This embodiment provides a ball head automatic testing device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0023] The upper driving mechanism includes: The upper reduction motor 7 is arranged at the upper end of the upper support platform 1, and the driving end extends to the lower end of the upper support platform 1; One end of the universal coupling 8 is connected to the driving end of the upper reduction motor 7, and the other end is connected to one end of the middle receiving mechanism.

[0024] In this technical solution, the upper reduction motor 7 is used to provide power for driving the ball pin to rotate, and the universal coupling 8 can better connect the middle supporting mechanism and the upper reduction motor 7, ensuring that the upper reduction motor 7 can smoothly transmit the torque to the ball pin during the rotation and swinging of the ball pin.

[0025] Embodiment 3: This embodiment provides a ball head automatic testing device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0026] The central undertaking institutions include: The receiving platform is arranged on the middle supporting platform 2, and a mounting hole connected to the middle supporting platform 2 is formed in the middle part thereof; A receiving seat is freely rotatably arranged on the receiving platform; An adjusting receiving rod is arranged on the receiving seat and is radially fixedly connected to the receiving seat; The receiving platform includes: Two receiving shells 9 are symmetrically arranged on the middle support platform 2 and fixed by bolts; The support hole 10 is spherical, formed between the two receiving shells 9, with both ends extending out of the receiving shells 9, and is coaxially arranged with the upper drive plate 5; The receiving seat is arranged in the supporting hole 10, and the middle receiving mechanism is respectively connected to the ball pin to be tested and the universal coupling 8 in the upper driving mechanism by adjusting the two ends of the receiving rod.

[0027] In the present technical solution, the setting of the receiving platform can facilitate the fixing of the middle receiving mechanism on the middle support platform 2, and the receiving seat is used to support and limit the receiving rod, and the adjusting receiving rod is powered by hydraulic pressure to achieve pressure or stretching on the ball pin. The receiving platform is formed by two receiving shells 9 that are snapped together, so that it is convenient to process the support hole 10, and to install and fix the receiving seat, and to facilitate later disassembly and maintenance. The spherical support hole 10 is set so that the receiving seat can rotate and swing at a certain angle and direction thereon, so as to ensure that the receiving rod can rotate and swing smoothly following the ball pin, thereby better improving the test effect of the ball head. At the same time, in order to ensure the overall strength of the middle receiving mechanism, the receiving platform of the receiving seat is made of high-strength metal or alloy. In order to limit the maximum swing angle of the adjusting receiving rod, a ring-shaped limit ring can be set at the upper end of the receiving platform, which is in rolling contact with the upper end side wall of the adjusting receiving rod. The limit ring includes a detachable semi-ring body, and a rolling groove is set at the connection between the two semi-ring bodies and close to the inner wall, and a limit ball is set on the rolling groove, which is in rolling contact with the adjusting receiving rod and rolls freely on the rolling groove.

[0028] Embodiment 4: This embodiment provides a ball head automatic testing device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0029] The socket includes: The receiving block 11 is in a stepped shape with small ends and a large middle part, and the two ends are vertical stepped surfaces, and the middle part of the outer wall is spherical; Two end pressure blocks 12 are respectively arranged on the stepped surfaces at both ends of the receiving block 11, and the outer walls are formed into arc-shaped surfaces smoothly connected to the spherical surface in the middle of the outer wall of the receiving block 11; A plurality of receiving grooves are evenly distributed along the circumference and formed at the end surface connection between the receiving block 11 and the end pressure block 12, and extend out of the outer wall of the end pressure block 12 and the receiving block 11, and the receiving grooves are spherical; A plurality of receiving bodies 13 are respectively and freely rotatably arranged in each receiving groove; The receiving hole 14 is coaxially arranged on the receiving block 11 and penetrates the end pressure blocks 12 at both ends for the adjustment receiving rod to be placed.

[0030] In the present technical solution, the outer wall of the receiving block 11 is spherical, which can better cooperate with the support hole 10, and the receiving block 11 does not separate from the support hole 10 when rotating and swinging on the support hole 10. Two end pressure blocks 12 are detachably arranged at both ends of the receiving block 11. The arrangement of the end pressure blocks 12 can ensure the fit between the receiving seat and the inner wall of the receiving hole 14, and is convenient for the processing of the receiving groove and the installation of the receiving body 13. The receiving groove is spherical and is used to place the receiving body 13. The receiving body 13 is a spherical structure made of metal and can rotate freely on the receiving groove. Through the rolling contact between the receiving body 13 and the inner wall of the support hole 10, the friction of the receiving seat when rolling on the support hole 10 can be reduced, so as to reduce the wear of the receiving seat and the receiving platform, and improve the service life of the middle receiving mechanism. The arrangement of the receiving hole 14 can facilitate the installation and fixation of the receiving rod.

[0031] Embodiment 5: This embodiment provides a ball head automatic testing device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0032] The socket also includes: Two end positioning members 15 are arranged in the receiving hole 14 symmetrically from top to bottom; The middle support member 28 is disposed in the receiving hole 14 and is located between the two end positioning members 15; The end positioning member 15 comprises: The end positioning block 15a is coaxially arranged in the receiving hole 14 and is radially limited with the receiving hole 14; The end positioning ring 15b is coaxially arranged on the end positioning block 15a, and a positioning hole penetrating the end positioning block 15a is formed in the middle thereof; Among them, the receiving hole 14 is in a stepped shape with small ends and a large middle part, and the hole part with a small diameter is coaxially formed on the end pressure block 12. The cross-section of the receiving hole 14 located in the receiving block 11 is a regular polygon, and the end positioning block 15a is a regular polygon that is compatible with and slidably matched with it; the positioning hole is a regular polygon, and the adjusting receiving rod passes through the positioning holes of the two end positioning parts 15 and is matched with the radial limiting position of the positioning hole; and the end positioning blocks 15a are extended from both ends of the adjusting receiving rod, and the two ends are respectively matched with the axial limiting position of the end positioning blocks 15a at the end.

[0033] In the present technical scheme, the arrangement of two end positioning members 15 can support and limit the adjustment of the receiving rod at both ends, and prevent the adjustment support rod from being separated from the receiving seat. The middle support member 28 is a strong spring, and the arrangement of the middle support member 28 can provide a certain buffer for the moment when the adjusting receiving rod presses or stretches the ball pin, thereby ensuring the stability of the driving of the adjusting receiving rod. At the same time, the end positioning block 15a of the end positioning member 15 can prevent it from being separated from the receiving hole 14, and the cooperation of the regular polygon end positioning block 15a and the regular polygon receiving hole 14 can better transfer torque. At the same time, the outer wall of the adjusting receiving rod is matched with the radial limiting of the positioning hole, that is, the adjusting receiving rod rotates synchronously with the end positioning ring 15b. When the upper driving mechanism drives the adjusting receiving rod to rotate, it will drive the end positioning member 15 and the receiving seat to rotate, so that the adjusting receiving rod is indirectly connected to the receiving platform for rotation, so as to ensure that the adjusting receiving rod is fixed and stable, and can also ensure that it can rotate smoothly.

[0034] Embodiment 6: This embodiment provides a ball head automatic testing device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0035] The adjustment rod includes: The outer rod body 16 has an outer wall in the shape of a regular polygon, adapted to the positioning hole, and a penetrating inner extrusion hole 17 is coaxially arranged in the middle; The upper pressure cover 18 is detachably fixed to one end of the outer rod body 16 and closes the end of the outer rod body 16. The outer edge is formed with an upper limit edge 18a that abuts against the outer end surface of the end positioning block 15a in one of the end positioning members 15. The lower pressure cover 19 is detachably fixed to the other end of the outer rod body 16, and has a through extension hole formed therein, and a lower limit edge 19a formed on the outer edge thereof to abut against the outer end surface of the end positioning block 15a in the other end positioning member 15; The inner rod body 20 is coaxially arranged on the outer rod body 16, and one end of the inner rod body 20 extends out of the outer rod body 16 through the extension hole; The inner support member is fixedly arranged on one end of the inner rod body 20 located inside the outer rod body 16 and is radially limitedly matched with the inner extrusion hole 17; Two end floating positioning members are arranged in the inner extrusion hole 17 and are respectively arranged at two ends of the inner support member; The inner extrusion hole 17 is provided with hydraulic chambers at the two ends of the floating positioning members which are respectively away from the inner support member; the ball pin to be detected is connected to the end of the inner rod body 20 through a connector, and the upper driving mechanism is connected to the upper pressure cover 18 in transmission.

[0036] In this technical solution, in order to ensure the strength of the adjusting receiving rod, the outer rod body 16, the upper pressure cover 18, the lower pressure cover 19 and the rod body are all made of high-strength metal or alloy. The upper pressure cover 18 and the lower pressure cover 19 are respectively formed with a concave chamber, and a part of the hydraulic chamber is formed on the chamber.

[0037] The adjusting receiving rod is radially limited by the outer rod body 16 and the end positioning piece 15. When the inner rod body 20 extends or retracts to apply pressure or stretch the ball pin, the outer rod body 16 can float axially under the positioning of the end positioning piece 15, thereby ensuring the stability of the hydraulic drive.

[0038] The outer wall of the outer rod body 16 is a regular polygon, so that it can better cooperate with the positioning hole for radial limiting. The penetrating inner extrusion hole 17 can facilitate the installation of the inner rod body 20, the inner support member and the end floating positioning member, and then the inner extrusion hole 17 is closed by the upper pressure cover 18 and the lower pressure cover 19.

[0039] The upper pressure cover 18 is used to close the upper end of the outer rod body 16, and abuts against the outer end of the end positioning piece 15 at the upper end through the upper limit edge 18a, so that when the inner rod body 20 retracts, that is, the ball pin is axially stretched, the end positioning piece 15 at the upper end can be driven to float to a certain extent in the receiving hole 14; the lower pressure cover 19 is used to close the lower end of the outer rod body 16 and facilitate the extension of the inner rod body 20, and abuts against the outer end of the end positioning piece 15 at the lower end through the lower limit edge 19a, so that when the inner rod body 20 extends, that is, the ball pin is axially pressed, the end positioning piece 15 at the lower end can be driven to float to a certain extent in the receiving hole 14; thereby better ensuring the stability and effect of adjusting the receiving rod to press or stretch the ball pin.

[0040] In order to ensure that the adjustment receiving rod can operate normally, the device also includes an external hydraulic drive system, which includes a hydraulic oil tank, a hydraulic circulation pipeline, a hydraulic pump, and two two-position three-way solenoid valves respectively connected to the two hydraulic chambers on the outer rod body 16 through pipelines, wherein when the valve core of the solenoid valve is in the first position, the hydraulic pump can inject hydraulic oil into the hydraulic chamber through the hydraulic circulation pipeline, and when the valve core of the solenoid valve is in the second position, the hydraulic chamber is connected to the hydraulic circulation pipeline for oil discharge. In addition, annular disc-type rotary connectors that are respectively connected to the hydraulic chambers on the respective sides can be provided at both ends outside the adjustment receiving rod, and the provision of the rotary connector can ensure that the hydraulic pipeline will not be entangled; and the liquid inlet of the rotary connector is connected to the interface of the two-position three-way solenoid valve through a pipeline, and the liquid outlet is connected to the hydraulic chamber.

[0041] When hydraulic oil is injected into the hydraulic cavity located at the upper part of the outer rod body 16, the inner rod body 20 extends, and the receiving rod is adjusted to apply axial pressure to the ball pin; when hydraulic oil is injected into the hydraulic cavity located at the lower part of the outer rod body 16, the inner rod body 20 retracts, and the receiving rod is adjusted to axially stretch the ball pin, and the setting of the inner support member can better transmit the torque of the outer rod body 16 to the inner rod body 20, and the setting of the end floating positioning member can squeeze the inner support member at both ends of the inner support member, thereby driving the displacement of the inner support member, and realizing the extension or retraction of the inner rod body 20. In normal state, the inner support member is located in the middle of the inner extrusion hole 17, and a part of the inner rod body 20 extends out of the outer rod body 16.

[0042] Embodiment 7: This embodiment provides a ball head automatic testing device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0043] The inner rod body 20 includes: The outer rod portion 20a is cylindrical and extends out of the outer rod body 16; The inner rod portion 20b is in the form of a regular polygon and is integrally formed with the outer rod portion 20a; The connecting portion 20c is integrally formed with the inner rod portion 20b and is formed with a connecting external thread; The inner support member is radially limited on the inner rod portion 20b, and is axially limited by a limit block 29 threadedly engaged with the connecting portion 20c.

[0044] In the present technical solution, the end of the outer rod 20a is connected to the rod of the ball pin through a connecting head. The connecting head can be a sleeve structure with threaded holes and positioning pin holes at both ends, or a combined structure with a threaded hole and a positioning pin hole at one end and a chuck at the other end. The chuck structure can refer to the chuck of an electric drill; the inner rod body 20 is a regular polygon so that it can better cooperate with the inner support to transmit torque; and the connecting part 20c has an external thread to facilitate axial limiting of the inner support.

[0045] Embodiment 8: This embodiment provides a ball head automatic testing device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0046] The inner support includes: The lower receiving ring 21 has a regular polygonal hole formed on the inner side thereof for radially limiting the inner rod portion 20b, and a plurality of limiting teeth 21a evenly distributed along the circumference formed on the outer side thereof; The middle receiving ring 22 is sleeved on the inner rod 20b and is in clearance with the inner rod 20b. A plurality of positioning teeth 22a are formed on its outer wall and are evenly distributed along the circumference. A sunken groove is formed at one end of the lower receiving ring 21. A limiting groove matching the limiting teeth 21a is formed on the side wall of the groove. The outer receiving ring 23 is sleeved on the inner rod 20b, and its outer wall is a regular polygon, and a matching groove that is slidably matched with the middle receiving ring 22 is formed at one end close to the middle receiving ring 22, and a positioning groove that is matched and slidably matched with the positioning tooth 22a is formed on the side wall of the matching groove, and a protruding positioning portion 23a is formed in the middle of the matching groove, and a regular polygonal connecting hole that penetrates the outer receiving ring 23 and is radially limited and matched with the inner rod 20b is formed in the middle of the positioning portion 23a, and a protruding force-bearing portion is formed at one end away from the middle receiving ring 22; The inner floating support member 24 is sleeved on the inner rod portion 20b and has one end clamped on the positioning portion 23a and the other end abutting against the middle receiving ring 22; A regular polygonal transmission hole is formed in the middle of the inner extrusion hole 17 to cooperate with the outer receiving ring 23 , and the lower receiving ring 21 and the force-bearing part at both ends of the inner floating support 24 partially extend out of the transmission hole.

[0047] In this technical solution, the lower receiving ring 21 is sleeved on the inner rod portion 20b and abuts against the end of the outer rod body 16. At the same time, the lower receiving ring 21 and the inner rod portion 20b are radially limited, so that the torque can be better transmitted to the inner rod portion 20b. The middle receiving ring 22 is clearance-matched with the inner rod portion 20b, and is matched with the lower receiving ring 21 through the limiting groove; while the outer receiving ring 23 is radially limited and matched with the inner rod portion 20b, it is also radially limited and matched with the middle receiving ring 22, and at the same time is radially limited and matched with the transmission hole in the middle of the inner extrusion hole 17, that is, after the outer rod body 16 transmits the torque to the outer receiving ring 23, the outer receiving ring 23 simultaneously transmits the torque to the inner rod portion 20b and the middle receiving ring 22, and the middle receiving ring 22 is radially limited and matched with the lower receiving ring 21, so that the middle receiving ring 22 transmits the torque to the lower receiving ring 21, and then the lower receiving ring 21 transmits the torque to the middle rod portion again, so that the middle rod portion is subjected to the torque transmission of both the lower receiving ring 21 and the outer receiving ring 23 and synchronously, thereby ensuring the stability of the torque transmission, and when one of the torque transmissions fails, it does not affect the driving of the inner rod body 20. The inner floating support 24 can be an elastic component, such as a spring, etc.; and when the end floating positioning member is subjected to hydraulic pressure to squeeze the inner floating support 24, the inner support member as a whole has a certain axial floating ability, thereby reducing the looseness of the limit block 29 while ensuring the stability of the drive of the adjusting receiving rod, and ensuring that the adjusting receiving rod has a certain buffering and vibration reduction effect, thereby improving the stability and service life of the overall structure of the adjusting receiving rod.

[0048] Embodiment 9: This embodiment provides a ball head automatic testing device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0049] End floating locators include: An inner sealing contact block 25 is disposed on the inner rod body 20 and is in contact with the inner support member; The outer extrusion block 26 is disposed on a side of the inner sealing contact block 25 away from the inner support member and abuts against the inner sealing contact block 25; The outer support member 27 is disposed in the outer rod body 16, and one end of the outer support member 27 abuts against the outer extrusion block 26, and the other end of the outer support member 27 abuts against the upper pressure cover 18 or the lower pressure cover 19; The outer extrusion block 26 and the inner sealing contact block 25 in the end floating positioning member on the side of the lower pressure cover 19 are both sleeved on the inner rod body 20, and are respectively slidably matched with the inner rod body 20 and the inner extrusion hole 17 on that side, and the inner sealing contact block 25 is in contact with the lower receiving ring 21; the inner sealing contact block 25 in the end floating positioning member on the side of the upper pressure cover 18 is slidably matched with the connecting portion 20c at the end of the inner rod body 20, and the outer extrusion block 26 and the inner sealing contact block 25 are respectively slidably matched with the inner extrusion hole 17 on that side, and the inner sealing contact block 25 is in contact with the outer receiving ring 23.

[0050] In the present technical solution, the inner sealing contact block 25 is used to cooperate with the inner support and seal the hydraulic chamber at the same time to prevent the hydraulic oil from entering the transmission hole where the inner support is located; and the outer extrusion block 26 pushes the inner sealing contact block 25 to drive the inner support to move under the action of hydraulic pressure, so that the inner rod body 20 can be extended and retracted relative to the outer rod body 16; and the setting of the outer support 27 can facilitate the reset of the inner extrusion block and the inner sealing contact block 25, so as to ensure the smooth extension and retraction of the inner rod body 20. The inner sealing contact block 25 has sealing parts formed on both sides of one end facing the inner support, which are in sealing contact with the inner support and the inner extrusion hole 17, and the outer wall of the inner sealing contact block 25 has a plurality of sealing edges formed on the inner wall to be sealed with the inner extrusion hole 17.

[0051] Embodiment 10: This embodiment provides a testing method for a ball head automatic testing device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0052] Test methods include: Step 1: Place the workpiece, placing the ball shell and ball pin to be tested on the upper placement seat 6; Step 2: Workpiece connection: connect one end of the ball pin to be tested with one end of the middle receiving mechanism; Step 3: tensile test: applying axial tensile force to the ball pin to be tested through the middle receiving mechanism, then starting the lower driving mechanism to cause the ball shell and the ball pin to revolve regularly along the central axis of the upper driving disk 5, and starting the upper driving mechanism to drive the ball pin to rotate regularly along its own central axis, and the duration is T1; Step 4: Pressure test: Apply axial downward pressure to the ball pin to be tested through the middle receiving mechanism, then start the lower driving mechanism to make the ball shell and the ball pin revolve regularly along the central axis of the upper driving disk 5, and start the upper driving mechanism to drive the ball pin to rotate regularly along its own central axis, and the duration is T2; Step 5, repeat the process of step 3 and step 4 to test until X number of cycles are completed; In step 3 and step 4, the middle receiving mechanism applies different tensile or downward forces to the ball pin to be tested in different cycle times.

[0053] In this technical solution, the stress of the ball head during operation is simulated by the above-mentioned test method, so as to test the wear resistance of the ball pin and the ball shell and the compressive or tensile strength of the ball pin; at the same time, by changing the tensile or downward force applied, the working environment of the ball pin can be better simulated, and the magnitude of the force can be adjusted by the hydraulic drive system. And the time T1 and T2 in step three and step four are both greater than 180 seconds; the rotation speed of the upper drive disk 5 and the ball pin is greater than 50r / min.

[0054] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A ball head automatic testing device, characterized in that: include: A frame having an upper support platform (1), a middle support platform (2) and a lower support platform (3); A lower driving mechanism, arranged on the lower supporting platform (3); A middle receiving mechanism, arranged on the middle supporting platform (2); An upper driving mechanism is arranged on the upper supporting platform (1); The lower driving mechanism comprises: A lower reduction motor (4) is arranged at the lower end of the lower support platform (3) and the driving end of the motor extends to the upper end of the lower support platform (3); An upper driving plate (5) is arranged on the upper end of the lower supporting platform (3) and is driven to rotate by the lower reduction motor (4); The upper placement seat (6) is detachably arranged on one side of the upper driving disk (5) and is used to place the ball shell and ball pin to be tested, and is formed with a through hole for the ball pin to extend out and to swing.

2. The ball head automatic testing device according to claim 1, characterized in that: The upper driving mechanism comprises: An upper reduction motor (7) is arranged at the upper end of the upper support platform (1), and a driving end thereof extends to the lower end of the upper support platform (1); A universal coupling (8) has one end connected to the driving end of the upper reduction motor (7) and the other end connected to one end of the middle receiving mechanism.

3. The ball head automatic testing device according to claim 1 or 2, characterized in that: The middle receiving mechanism comprises: A receiving platform is arranged on the middle supporting platform (2), and a mounting hole connected to the middle supporting platform (2) is formed in the middle part thereof; A receiving seat is freely rotatably arranged on the receiving platform; An adjusting receiving rod is arranged on the receiving seat and connected to the receiving seat; The receiving platform comprises: Two receiving shells (9) are symmetrically arranged on the middle support platform (2) and fixed by bolts; The support hole (10) is spherical, formed between the two receiving shells (9), with both ends extending out of the receiving shells (9), and is coaxially arranged with the upper drive disk (5); The receiving seat is arranged in the supporting hole (10), and the middle receiving mechanism is respectively connected to the ball pin to be tested and the upper driving mechanism by adjusting the two ends of the receiving rod.

4. The ball head automatic testing device according to claim 3, characterized in that: The receiving seat comprises: The receiving block (11) has vertical stepped surfaces at both ends and a spherical surface in the middle of the outer wall; Two end pressure blocks (12) are respectively arranged at two ends of the receiving block (11), and the outer walls are formed into arc-shaped surfaces smoothly connected to the middle part of the outer wall of the receiving block (11); A plurality of receiving grooves are evenly distributed along the circumference and formed at the connection between the end faces of the receiving block (11) and the end pressing block (12), and extend out of the outer walls of the end pressing block (12) and the receiving block (11); A plurality of receiving bodies (13) are respectively arranged in each receiving groove; The receiving hole (14) is coaxially arranged on the receiving block (11) and penetrates the end pressure blocks (12) at both ends for the adjustment receiving rod to be placed.

5. The ball head automatic testing device according to claim 4, characterized in that: The receiving seat further comprises: Two end positioning members (15) are symmetrically arranged in the receiving hole (14); A middle support member (28) is disposed in the receiving hole (14) and is located between the two end positioning members (15); The end positioning member (15) comprises: An end positioning block (15a) is coaxially arranged in the receiving hole (14) and is limitedly matched with the receiving hole (14); The end positioning ring (15b) is coaxially arranged on the end positioning block (15a), and a positioning hole penetrating the end positioning block (15a) is formed in the middle thereof.

6. The ball head automatic testing device according to claim 5, characterized in that: The adjusting receiving rod comprises: The outer rod body (16) has an outer wall in the form of a regular polygon and a penetrating inner extrusion hole (17) coaxially disposed in the middle; An upper pressure cover (18) is detachably fixed to one end of the outer rod body (16) and seals the end of the outer rod body (16), and an upper limit edge (18a) is formed on the outer edge thereof to abut against the outer end surface of one of the end positioning members (15); A lower pressure cover (19) is detachably fixed to the other end of the outer rod body (16), has an extending hole extending therethrough, and has an outer edge formed with a lower limit edge (19a) that abuts against an outer end surface of the other end positioning member (15); An inner rod body (20) is coaxially arranged on the outer rod body (16), and one end of the inner rod body (20) extends out of the outer rod body (16) through the extension hole; An inner support member is fixedly arranged on one end of the inner rod body (20) located inside the outer rod body (16) and cooperates with the inner extrusion hole (17); Two end floating positioning members are arranged in the inner extrusion hole (17) and are respectively arranged at two ends of the inner support member; The inner extrusion hole (17) is provided with hydraulic chambers at the ends of the two end floating positioning members respectively away from the inner support member; the ball pin to be detected is connected to the end of the inner rod body (20) via a connector, and the upper driving mechanism is transmission-connected to the upper pressure cover (18).

7. The ball head automatic testing device according to claim 6, characterized in that: The inner rod body (20) comprises: The outer rod portion (20a) is cylindrical and extends out of the outer rod body (16); The inner rod portion (20b) is in the form of a regular polygon and is integrally formed with the outer rod portion (20a); A connecting portion (20c) is integrally formed with the inner rod portion (20b) and is provided with a connecting external thread; The inner support member is arranged on the inner rod portion (20b) and is limited in position by a limit block (29) threadably engaged with the connecting portion (20c).

8. The ball head automatic testing device according to claim 7, characterized in that: The inner support member comprises: The lower receiving ring (21) has a regular polygonal hole formed on the inner side thereof for limiting engagement with the inner rod portion (20b), and a plurality of limiting teeth (21a) evenly distributed along the circumference formed on the outer side thereof; A middle receiving ring (22) is sleeved on the inner rod portion (20b) and is clearance-matched with the inner rod portion (20b), and a plurality of positioning teeth (22a) are formed on its outer wall and are evenly distributed along the circumference, and a sunken groove is formed at one end of the lower receiving ring (21), and a limiting groove matching the limiting teeth (21a) is formed on the side wall of the groove; An outer receiving ring (23) is sleeved on the inner rod portion (20b), and its outer wall is in the shape of a regular polygon, and a matching groove for slidingly matching with the middle receiving ring (22) is formed at one end close to the middle receiving ring (22), a positioning groove for matching and slidingly matching with the positioning teeth (22a) is formed on the side wall of the matching groove, and a protruding positioning portion (23a) is formed in the middle of the matching groove; The inner floating support member (24) is sleeved on the inner rod portion (20b) and has one end clamped on the positioning portion (23a) and the other end abutting against the middle receiving ring (22).

9. The ball head automatic testing device according to claim 8, characterized in that: The end floating positioning member comprises: An inner sealing contact block (25) is arranged on the inner rod body (20) and is in contact with the inner support member; An outer extrusion block (26) is disposed on a side of the inner sealing contact block (25) away from the inner support member and abuts against the inner sealing contact block (25); The outer support member (27) is arranged in the outer rod body (16), and one end of the outer support member abuts against the outer extrusion block (26), and the other end of the outer support member abuts against the upper pressure cover (18) or the lower pressure cover (19).

10. A testing method applicable to the ball head automatic testing device according to any one of claims 1 to 9, characterized in that: include: Step 1: Workpiece placement: Place the ball shell and ball pin to be tested on the upper placement seat (6); Step 2: Workpiece connection: connect one end of the ball pin to be tested with one end of the middle receiving mechanism; Step 3: tensile test, applying axial tensile force to the ball pin to be tested through the middle receiving mechanism, then starting the lower driving mechanism to cause the ball shell and the ball pin to revolve regularly along the central axis of the upper driving disk (5), and starting the upper driving mechanism to drive the ball pin to rotate regularly along its own central axis, and the duration is T1; Step 4: pressure test, applying axial downward pressure to the ball pin to be tested through the middle receiving mechanism, then starting the lower driving mechanism to make the initial ball shell and the ball pin revolve regularly along the central axis of the upper driving disk (5), and starting the upper driving mechanism to drive the ball pin to rotate regularly along its own central axis, and the duration is T2; Step 5, repeat the process of step 3 and step 4 to test until X number of cycles are completed; In step 3 and step 4, the middle receiving mechanism applies different tensile or downward forces to the ball pin to be tested in different cycle times.

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