Plug terminal bending tester convenient to clamp and fix

Abstract

The invention discloses a plug terminal bending testing machine convenient to clamp and fix, and relates to the technical field of plug testing, the plug terminal bending testing machine comprises a lower box body, an upper cover body which is mounted at the top end of the lower box body and is provided with a grating sensor at a feeding inlet, and a lifting assembly mounted at the top end of the upper cover body; a partition type tool table is fixed to the top end of the lower box body, four positioning chambers are arranged in the partition type tool table, and a U-shaped bracket used for bearing a plug workpiece is fixed to the inner wall of the side, close to the vertical center datum plane of the partition type tool table, of each positioning chamber. Inclined block type opposite synchronous clamping assemblies used for fixing the plug workpiece from the two sides are arranged in the positioning chamber. According to the multi-station parallel synchronous test framework, the problems that the efficiency of a traditional single-station mode is low and the test consistency is difficult to guarantee are solved in cooperation with the multi-station synchronous clamping, pneumatic abutting and unified driving bending turn-back assemblies.

Description

Technical Field

[0001] This invention relates to the field of plug testing technology, and in particular to a plug terminal bending tester that is easy to clamp and fix. Background Technology

[0002] A plug terminal bending tester is a device used to evaluate the performance of plug metal terminals after repeated bending. Its core function is to simulate the repeated bending stress that terminals may experience in actual use, thereby testing their fatigue resistance, material toughness, and reliability of bonding with the insulation body. This type of device typically consists of several main parts, including a support, clamps, a drive system, and a control system. The support, as the basic structure, is made of robust metal materials to ensure that it can withstand the applied force during the test. The clamps are designed to be adjustable to accommodate metal terminals of different types of plugs, ensuring that the terminals do not shift during the test. The drive system is the core of realizing the terminal bending action. Common drive methods include electric motors, pneumatic systems, and hydraulic systems. In actual use, the operator needs to adjust the clamps according to the type of plug to be tested, set the corresponding test parameters, and start the equipment. The drive system then begins to simulate the bending conditions in actual use. After the set number of bending cycles, the equipment automatically stops, and the operator can remove the plug for visual inspection and electrical performance testing. As disclosed in patent application CN221725795U, a bending and breaking device for terminal blocks includes a clamping assembly, a bending assembly, and a driving assembly. The clamping assembly has a clamping position for clamping the terminal block, and the clamping position has a clamping central shaft. The bending assembly has a limiting part through which the clamping central shaft passes. The driving assembly is connected to the limiting part and is used to drive the limiting part to reciprocate at a first extreme position and a second extreme position. At the first extreme position, the limiting part can abut against the terminal block bending in a first direction; at the second extreme position, the limiting part can abut against the terminal block bending in the opposite direction of the first direction. It can be seen that the above technical solution can reciprocate bending of the terminal block, causing it to rapidly fatigue and eventually break. However, its clamping assembly is mainly a screw-type clamping structure, and the driving assembly, mainly composed of hydraulic cylinders, needs to be matched one-to-one with the single-station clamping assembly, with each unit of time... The test only involves bending a single plug terminal, while plug terminal bending tests typically require thousands or even tens of thousands of cycles. When multiple plugs need to be tested in batches, the testing time will increase significantly, affecting the timeliness of quality feedback. Furthermore, although the screw-type clamp has a large clamping force, even the same operator will tighten the screw with different torques on different workpieces in different tests. This will directly lead to different degrees of secure fixing of the plug body in different test batches. In the bending test, the constraint conditions of the clamp on the plug body and terminal directly affect the way stress is transmitted to the root of the terminal. Even small differences in clamping force can affect the stress concentration at the bending point and the final failure mode, thereby reducing the reliability of the test data. Summary of the Invention

[0003] The purpose of this invention is to provide a convenient plug terminal bending test machine for clamping and fixing. Four plug workpieces to be bent are placed one by one into the workpiece positioning chamber of the partitioned fixture table, so that the plug workpieces are located at the inclined block type opposing synchronous clamping components. Then, the bidirectional linear drive component is activated, so that each inclined block type opposing synchronous clamping component works to clamp the plug workpiece. At the same time, the double-position pneumatic abutment component also abuts the plug workpiece from the remaining side. The adjustable clamping component above the workpiece positioning chamber clamps one of the plug terminals to be tested. The rotation drive component outputs power synchronously to the four bending and reversing components. The bending and reversing components drive the adjustable clamping components to move back and forth, and the counting component records the number of bends, thereby achieving bending of the terminal until it breaks. This solves the problems of long single-station test cycle and workpiece clamping differences under different tests for the same workpiece mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a plug terminal bending tester that is easy to clamp and fix, comprising a lower housing, an upper cover installed on the top of the lower housing and equipped with a grating sensor at the feeding inlet, and a lifting assembly installed on the top of the upper cover. The top of the lower housing is fixed with a partition-type tooling table. The partition-type tooling table has four positioning chambers. Each positioning chamber has a U-shaped support for supporting the plug workpiece fixed on the inner wall of the side closest to the vertical center reference plane of the partition-type tooling table. The positioning chamber is equipped with a diagonal block-type opposing synchronous clamping assembly for fixing the plug workpiece from both sides. The bottom of the partition-type tooling table is equipped with a bidirectional linear drive assembly for synchronizing the operation of the four diagonal block-type opposing synchronous clamping assemblies. A double-position pneumatic abutment assembly is installed at the front and rear positions of the top of the partition-type tooling table. The double-position pneumatic abutment assembly abuts the plug workpiece from the remaining direction perpendicular to the front two sides. An adjustable clamping assembly for fixing the plug terminals is provided above the positioning chamber. The platform is positioned directly above the partitioned tooling table and mounted on the drive end of the lifting assembly. Each corner of the platform's top edge is equipped with a bending and reversing assembly that drives the adjustable clamping assembly to move along the platform's width. A counting assembly is located on the top of one side of the bending and reversing assembly. A rotary drive assembly is located at the bottom of the platform to synchronously output rotational power to the four bending and reversing assemblies. A PLC control panel is mounted on one side of the upper cover surface. The output of the PLC control panel is electrically connected to the inputs of the lifting assembly, the bidirectional linear drive assembly, the dual-position pneumatic abutment assembly, the rotary drive assembly, and the adjustable clamping assembly.

[0005] Preferably, the bidirectional linear drive assembly includes a lead screw bidirectional linear module and a pair of outer beam plates spaced apart. The outer beam plates are connected to two inclined block-type opposing synchronous clamping assemblies on the same side. The lead screw bidirectional linear module is installed at the bottom end of the partitioned tooling table along the width direction and drives the two outer beam plates to move towards each other.

[0006] Preferably, the inclined block type opposing synchronous clamping assembly includes an inner beam plate, a connecting column, two wedge blocks, and two clamping blocks. The inner beam plate is installed in the positioning chamber, the connecting column is installed on one side of the outer wall of the inner beam plate, and one end of the connecting column extends through to the outside of the partition-type tooling table and is fixedly connected to the outer beam plate. The two wedge blocks are symmetrically fixed on the other side of the outer wall of the inner beam plate, and the opposite side outer walls of the two wedge blocks are provided with inclined surfaces. The two clamping blocks are distributed on both sides of the U-shaped support and slide in cooperation with one side of the inner wall of the positioning chamber through a track. The side outer wall of the clamping block away from the U-shaped support contacts the inclined surface and is equipped with an elastic reset structure.

[0007] Preferably, the elastic reset structure includes a T-shaped rod and a reset spring. The T-shaped rod is installed on the left and right outer walls of the positioning chamber and can move along the length of the clamping block. One end of the T-shaped rod is fixed to one side of the outer wall of the clamping block. The reset spring is sleeved on the T-shaped rod and located on the outside of the positioning chamber. A U-shaped groove is provided inside the wedge-shaped block, and the T-shaped rod is located in the U-shaped groove.

[0008] Preferably, the dual-position pneumatic abutment assembly includes a base fixed to the top of the partitioned tooling table, a pen-shaped cylinder mounted on the top of the base via an L-shaped bracket, and a slide mounted on the top of the base. Both sides of the top of the slide are bolted to a base plate, and an L-shaped clamping arm is mounted on the bottom of the base plate. The lower end of the L-shaped clamping arm is located between the inner beam plate and the U-shaped support, and a notch is provided at the top corner of the L-shaped clamping arm.

[0009] Preferably, the rotary drive assembly includes two horizontal frames fixed parallel to each other along the length of the bottom end of the platform, a drive shaft rotatably mounted on the outer walls of the two horizontal frames away from each other via bearing seats, and a stepper motor mounted on one side of the outer wall of one of the horizontal frames. The output shaft of the stepper motor is fixed to the end of one of the drive shafts via a coupling. A sprocket drive structure is installed between the same ends of the two drive shafts. An active bevel gear is fixed on the outer circumferential surface of the drive shaft below the bending and reversing assembly.

[0010] Preferably, the adjustable clamping assembly includes a lead screw manual module installed on the drive end of the bending and reversing assembly, a vertical rod on the moving end of the lead screw manual module, a first tensioning seat installed at a lower position on the surface of the vertical rod, and a crossbar fixed on one side of the outer wall of the first tensioning seat. A second tensioning seat is installed at one end of the surface of the crossbar, and a finger cylinder is installed on one side of the outer wall of the second tensioning seat. The finger cylinder is used to clamp the plug terminal. A straight groove is provided on both sides of the top of the platform along the width direction. The vertical rod passes through the straight groove and is located between the two horizontal frames.

[0011] Preferably, the bending and reversing assembly includes a U-shaped carriage mounted on the top of the platform along the width direction of the platform via a guide rail, a driven bevel gear shaft rotatably mounted on the top of the platform, and a V-shaped rocker arm disposed outside the driven bevel gear shaft. A short shaft is rotatably mounted on one side of the top of the platform. The V-shaped rocker arm and the short shaft are fitted together by roller bearings. The lower end of the driven bevel gear shaft meshes with the driving bevel gear. An upper cam and a lower cam are stacked and fixed on the upper end of the driven bevel gear shaft from top to bottom. A first driving wheel and a second driving wheel are rotatably mounted on the top of the V-shaped rocker arm and on one side inner wall, respectively. The first driving wheel contacts the upper cam, and the second driving wheel contacts the lower cam. The end of the V-shaped rocker arm away from the short shaft is movably connected to the U-shaped carriage.

[0012] Preferably, a notch is provided on one inner wall of the U-shaped carriage, and a third moving wheel is provided inside the notch. The lower end of the third moving wheel is rotatably connected to the V-shaped rocker arm.

[0013] Preferably, the counting assembly includes a right-angled tongue mounted on the top of one of the U-shaped carriages and a slotted photoelectric counting sensor mounted at one of the top corners of the platform, wherein the output of the slotted photoelectric counting sensor is electrically connected to the input of the PLC control panel.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: This convenient clamping and fixing plug terminal bending testing machine, through a structure consisting of a partitioned tooling table, a wedge-type opposing synchronous clamping assembly, a bidirectional linear drive assembly, a dual-position pneumatic abutment assembly, a lifting assembly, a platform, a bending and folding assembly, an adjustable clamping assembly, a rotary drive assembly, and a counting assembly, etc., cooperates to place four plug workpieces to be bent into the workpiece positioning chamber, so that the plug workpieces are located at the wedge-type opposing synchronous clamping assembly. Then, the bidirectional linear drive assembly is activated, so that each wedge-type opposing synchronous clamping assembly works to clamp the plug workpieces. The plug workpiece is clamped, and at the same time, the dual-position pneumatic abutment assembly also abuts the plug workpiece from the remaining side. The adjustable clamping assembly above the workpiece positioning chamber clamps one of the terminals to be tested in the plug. The rotation drive assembly outputs power synchronously to the four bending and reversing assemblies. The bending and reversing assemblies drive the adjustable clamping assembly to move back and forth, and the counting assembly records the number of bends, so as to bend the terminal until it breaks. In this way, by using the multi-station parallel synchronous testing architecture, combined with multi-station synchronous clamping, pneumatic abutment, and unified drive of each bending and reversing assembly, the problems of low efficiency and difficulty in ensuring test consistency in the traditional single-station mode are solved. By designing four workpiece positioning chambers and corresponding inclined block-type opposing synchronous clamping components and bending and reversing components in a partitioned tooling table, bending tests can be performed on four plug workpieces simultaneously. This changes the traditional serial mode of testing one by one at a single station to a parallel processing mode, effectively shortening the overall testing time of the plug workpieces. Secondly, in traditional single-station operations, even for the same workpiece in different tests, it is difficult to guarantee the same clamping force and position due to manual operation such as screw locking. However, in this solution, each inclined block-type opposing synchronous clamping component operates under the unified drive of the bidirectional linear drive component. The clamping actions of the four stations are performed simultaneously, from the same source, and with the same force. The two lateral clamping forces on each plug body are uniform and synchronous, while the dual-position pneumatic abutment assembly provides supplementary fixation from the remaining sides, further ensuring that each workpiece is in a highly consistent state of being completely constrained in three-dimensional space in the positioning chamber. After the four adjustable clamping assemblies clamp the terminals to be tested, a single rotation drive assembly synchronously outputs power to the four bending and folding assemblies. The bending actions of the four terminals to be tested are absolutely synchronous and identical, thus providing consistent bending conditions for all samples tested in parallel, making the test results of the four stations comparable. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 yes Figure 1Sectional view at point AA; Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ; Figure 5 This is a three-dimensional structural diagram of the present invention after the upper cover has been removed; Figure 6 This is a side view of the structure of the upper cover after it has been removed; Figure 7 This is a top view of the partitioned tooling table structure of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of the inclined block type opposing synchronous clamping assembly of the present invention. Figure 1 ; Figure 9 This is a schematic diagram of the three-dimensional structure of the inclined block type opposing synchronous clamping assembly of the present invention. Figure 2 ; Figure 10 yes Figure 1 A three-dimensional structural cross-sectional view of point AA; Figure 11 This is a three-dimensional structural diagram of the dual-position pneumatic abutment assembly of the present invention; Figure 12 This is a schematic diagram of the three-dimensional structure of the rotary drive component of the present invention. Figure 1 ; Figure 13 This is a schematic diagram of the three-dimensional structure of the rotary drive component of the present invention. Figure 2 ; Figure 14 This is a three-dimensional structural diagram of the bending and reversing component of the present invention; Figure 15 This is a schematic diagram of the three-dimensional structure of the V-shaped rocker arm of the present invention; Figure 16 This is a three-dimensional structural diagram of the adjustable clamping component of the present invention; Figure 17 yes Figure 6 A three-dimensional sectional view of the BB section; Figure 18 For the present invention Figure 17 Enlarged structural diagram at point A in the middle.

[0016] In the diagram: 1. Lower housing; 2. Upper cover; 3. Lifting assembly; 4. Platform; 41. Long slot; 5. Bending and reversing assembly; 51. Driven bevel gear shaft; 52. U-shaped carriage; 53. Upper cam; 54. Short shaft; 55. Lower cam; 56. V-shaped rocker arm; 57. First moving wheel; 58. Third moving wheel; 59. Notched slot; 510. Second moving wheel; 6. Rotary drive assembly; 61. Horizontal frame; 62. Drive shaft; 63. Stepper motor; 64. Chain drive structure; 65. Active bevel gear; 7. Adjustable clamping assembly; 71. Screw manual module; 72. Vertical rod; 73. First tensioning seat; 74. Horizontal bar; 75. Second tensioning seat; 76. Finger cylinder; 8. Partitioned tooling table; 81. Positioning chamber; 82. U-shaped support; 9. Inclined block type opposing synchronous clamping assembly; 91. Inner beam plate; 92. Connecting column; 93. Wedge block; 931. Inclined surface; 932. U-shaped groove; 94. Clamping block; 95. T-shaped rod; 96. Return spring; 10. Bidirectional linear drive assembly; 1001. Bidirectional linear screw module; 1002. Outer beam plate; 11. Dual-position pneumatic contact assembly; 1101. Base; 1102. Slide table; 1103. Pen-shaped cylinder; 1104. Base plate; 1105. L-shaped clamping arm; 11051. Notch; 12. Counting assembly; 1201. Right-angle tongue; 1202. Slotted photoelectric counting sensor; 13. PLC control panel. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0018] Example 1, by Figures 1 to 6 The present invention includes a lower housing 1, an upper cover 2 installed on the top of the lower housing 1 and equipped with a grating sensor at the feeding inlet, and a lifting assembly 3 installed on the top of the upper cover 2. The top of the lower housing 1 is fixed with a partition-type tooling table 8. The partition-type tooling table 8 has four positioning chambers 81 inside. Each positioning chamber 81 has a U-shaped support 82 for supporting the plug workpiece fixed on the inner wall of one side near the vertical center reference plane of the partition-type tooling table 8. The positioning chamber 81 has a diagonal block type opposing synchronous clamping assembly 9 for fixing the plug workpiece from both sides. The bottom of the partition-type tooling table 8 is provided with a bidirectional linear drive assembly 10 for making the four diagonal block type opposing synchronous clamping assemblies 9 move synchronously. The front and rear positions of the top of the partition-type tooling table 8 are equipped with a double-position pneumatic abutment assembly 11. The double-position pneumatic abutment assembly 11 abuts the plug workpiece from the remaining direction perpendicular to the front two sides. The upper part of the positioning chamber 81 is provided with an adjustable clamping assembly 7 for fixing the plug terminal. Platform 4 is positioned directly above partitioned tooling table 8 and mounted on the drive end of lifting assembly 3. Each corner of the top of platform 4 is equipped with a bending and reversing assembly 5 that drives the adjustable clamping assembly 7 to move along the width direction of platform 4. A counting assembly 12 is provided on the top of platform 4 on one side of one of the bending and reversing assemblies 5. A rotary drive assembly 6 is provided at the bottom of platform 4 to synchronously output rotational power to the four bending and reversing assemblies 5. A PLC control panel 13 is mounted on one side of the surface of the upper cover 2. The output end of the PLC control panel 13 is electrically connected to the input end of lifting assembly 3, bidirectional linear drive assembly 10, dual-position pneumatic abutment assembly 11, rotary drive assembly 6, and adjustable clamping assembly 7. The partitioned tooling table 8 and its four internal positioning chambers 81 enable batch testing and isolation. Each positioning chamber 81 is an independent and standard chamber, ensuring that the four plug workpieces are precisely pre-positioned before testing to prevent mutual interference and provide a repeatable reference position for subsequent synchronous clamping and testing. The lifting assembly 3 can be a mechanism with linear stroke, such as a hydraulic cylinder or a pneumatic cylinder. The switching of the piston rod's movement direction can be achieved by setting a reversing valve in the hydraulic circuit or pneumatic pipeline.

[0019] Example 2, based on Example 1, is... Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 The bidirectional linear drive assembly 10 includes a lead screw bidirectional linear module 1001 and a pair of outer beam plates 1002 spaced apart. The outer beam plates 1002 are connected to two inclined block type opposing synchronous clamping assemblies 9 on the same side. The lead screw bidirectional linear module 1001 is installed at the bottom of the partitioned tooling table 8 along the width direction of the partitioned tooling table 8 and drives the two outer beam plates 1002 to move towards each other. When the plug workpiece in the positioning chamber 81 is fixed by the bidirectional linear drive assembly 10 and the inclined block type opposing synchronous clamping assembly 9, the lead screw bidirectional linear module 1001 drives the two outer beam plates 1002 to move closer to each other. At this time, the two inclined block type opposing synchronous clamping assemblies 9 on the same side all obtain power input under the linear movement of the outer beam plate 1002, and then the four workpieces are subjected to the same lateral clamping force. The inclined block type opposing synchronous clamping assembly 9 includes an inner beam plate 91, a connecting column 92, two wedge blocks 93, and two clamping blocks 94. The inner beam plate 91 is installed in the positioning chamber 81. The connecting column 92 is installed on one side of the outer wall of the inner beam plate 91, and one end of the connecting column 92 extends through to the outside of the partition-type tooling table 8 and is fixedly connected to the outer beam plate 1002. The two wedge blocks 93 are symmetrically fixed on the other side of the outer wall of the inner beam plate 91, and each of the two wedge blocks 93 has an inclined surface 931 on its opposite side outer wall. The two clamping blocks 94 are distributed on both sides of the U-shaped support 82 and are connected to one side of the positioning chamber 81. The wall is slidably fitted by the track, and the outer wall of the clamping block 94 away from the U-shaped support 82 contacts the inclined surface 931 and is equipped with an elastic reset structure. When the two outer beam plates 1002 approach each other, the outer beam plate 1002 drives the inner beam plate 91 to move towards the U-shaped support 82 through the connecting column 92. Since the inclined surface 931 is provided on the opposite outer wall of the two wedge blocks 93, the wedge blocks 93 use the inclined surface 931 to push the clamping block 94 towards the outer wall of the plug workpiece until the two clamping blocks 94 fix the plug synchronously, ensuring that the plug remains stable during the test. The elastic reset structure includes a T-shaped rod 95 and a reset spring 96. The T-shaped rod 95 is installed on the left and right outer walls of the positioning chamber 81 and can move along the length of the clamping block 94. One end of the T-shaped rod 95 is fixedly connected to one side of the outer wall of the clamping block 94. The reset spring 96 is fitted on the T-shaped rod 95 and is located on the outside of the positioning chamber 81. The wedge block 93 has a U-shaped groove 932 inside, and the T-shaped rod 95 is located in the U-shaped groove 932. The U-shaped groove 932 ensures that the wedge block 93 is not obstructed by the T-shaped rod 95 when it moves. When the clamping of the plug workpiece is released, the lead screw bidirectional linear module 1001 drives the two outer beam plates 1002 to move away from each other. Then the return spring 96 between the T-shaped rod 95 and the outer wall of the partition tooling table 8 starts to return from the compressed state. Then the T-shaped rod 95 drives the clamping block 94 to gradually slide away from the U-shaped support 82. The dual-position pneumatic abutment assembly 11 includes a base 1101 fixed to the top of the partitioned tooling table 8, a pen-shaped cylinder 1103 mounted on the top of the base 1101 via an L-shaped bracket, and a slide table 1102 slidably mounted on the top of the base 1101. A base plate 1104 is bolted to both sides of the top of the slide table 1102. An L-shaped clamping arm 1105 is mounted on the bottom of the base plate 1104. The lower end of the L-shaped clamping arm 1105 is located between the inner beam plate 91 and the U-shaped support 82. A notch 11051 is provided at the top corner of the L-shaped clamping arm 1105. The notch 11051 is used to avoid the adjustable clamping assembly 7. After the inclined block type opposing synchronous clamping assembly 9 and the bidirectional linear drive assembly 10 complete the fixing operation of the four plug workpieces, the pen-shaped cylinder 1103 is activated through the PLC control panel 13. The pen-shaped cylinder 1103 drives the slide table 1102, the base plate 1104 and the L-shaped clamping arm 1105 to approach the U-shaped support 82. The L-shaped clamping arm 1105 applies constant pressure to the remaining side of the workpiece, forming a three-sided constraint with the inclined block type opposing synchronous clamping assembly 9, completely eliminating the degree of freedom of the workpiece in any direction, and ensuring that it remains motionless during bending.

[0020] Example 3, based on Example 2, by Figure 12 , Figure 13 , Figure 14 , Figure 15 , Figure 16 , Figure 17 and Figure 18 The rotary drive assembly 6 includes two horizontal frames 61 fixed parallel to each other along the length of the bottom end of the platform 4, a drive shaft 62 rotatably mounted on the outer walls of the two horizontal frames 61 away from each other via bearing seats, and a stepper motor 63 mounted on the outer wall of one side of one of the horizontal frames 61. The output shaft of the stepper motor 63 is fixed to the end of one of the drive shafts 62 via a coupling. A sprocket drive structure 64 is installed between the same ends of the two drive shafts 62. An active bevel gear 65 is fixed to the outer circumference of the drive shaft 62 below the bending and reversing assembly 5. After the plug and terminals are fixed, the stepper motor 63 works according to the direction, speed, angle, and response time set by the PLC control panel 13. Then, the stepper motor 63 directly drives one of the drive shafts 62 to rotate, while the other drive shaft 62 rotates synchronously and in the same direction under the drive of the sprocket drive structure 64. Both drive shafts 62 output power to the bending and reversing assembly 5 above through the active bevel gear 65. The adjustable clamping assembly 7 includes a lead screw manual module 71 mounted on the drive end of the bending and retraction assembly 5, a vertical rod 72 on the moving end of the lead screw manual module 71, a first tensioning seat 73 mounted at a lower position on the surface of the vertical rod 72, and a crossbar 74 fixed on one side of the outer wall of the first tensioning seat 73. A second tensioning seat 75 is mounted on one end of the surface of the crossbar 74, and a finger cylinder 76 is mounted on one side of the outer wall of the second tensioning seat 75. The finger cylinder 76 is used to clamp the plug terminal. A crossbar is provided on both sides of the top of the platform 4 along the width direction. The long slot 41 and the upright rod 72 pass through the long slot 41 and are located between the two horizontal frames 61. The lifting component 3 drives the platform 4, the bending and turning component 5, the rotation drive component 6 and the adjustable clamping component 7 to move down so that the gripper of the finger cylinder 76 is just located at the terminal to be tested. The operator can also manually operate the screw manual module 71, the first tensioning seat 73 and the second tensioning seat 75 according to the position of the plug terminal to change the spatial position of the finger cylinder 76, thereby adapting to the clamping requirements of plug terminals of different specifications. The bending and reversing assembly 5 includes a U-shaped carriage 52 mounted on the top of the platform 4 along the width direction of the platform 4 via a guide rail, a driven bevel gear shaft 51 rotatably mounted on the top of the platform 4, and a V-shaped rocker arm 56 disposed outside the driven bevel gear shaft 51. A short shaft 54 ​​is rotatably mounted on one side of the top of the platform 4. The V-shaped rocker arm 56 and the short shaft 54 ​​are fitted together by roller bearings. The lower end of the driven bevel gear shaft 51 meshes with the driving bevel gear 65. An upper cam is stacked and fixed from top to bottom on the upper end of the driven bevel gear shaft 51. The upper cam 53 and the lower cam 55, the top of the V-shaped rocker arm 56 and the inner wall of one side are respectively rotatably mounted with a first moving wheel 57 and a second moving wheel 510. The first moving wheel 57 is in contact with the upper cam 53, and the second moving wheel 510 is in contact with the lower cam 55. The end of the V-shaped rocker arm 56 away from the short shaft 54 ​​is movably connected to the U-shaped slide 52. A notch 59 is opened on the inner wall of one side of the U-shaped slide 52. A third moving wheel 58 is set inside the notch 59. The lower end of the third moving wheel 58 is rotatably connected to the V-shaped rocker arm 56. The drive shaft 62 drives the driven bevel gear shaft 51 above to rotate through the drive bevel gear 65. The driven bevel gear shaft 51 drives the upper cam 53 and the lower cam 55 to rotate. During the rotation of the upper cam 53 and the lower cam 55, the lower cam 55 forces the V-shaped rocker arm 56 to swing around the short shaft 54 ​​towards the outside of the platform 4 through the second drive wheel 510. Meanwhile, the upper cam 53 forces the V-shaped rocker arm 56 to swing around the short shaft 54 ​​towards the inside of the platform 4 through the first drive wheel 57. Therefore, the upper cam 53 and the lower cam 55 continuously force the V-shaped rocker arm 56 to swing back and forth during their rotation using the first drive wheel 57 and the second drive wheel 510. Since the third moving wheel 58 at the end of the V-shaped rocker arm 56 is located in the notch 59 of the U-shaped carriage 52, the reciprocating oscillating motion of the notch 59 will be transformed into the linear sliding motion of the U-shaped carriage 52 and the adjustable clamping assembly 7 under the action of the notch 59 and the third moving wheel 58. This will drive the adjustable clamping assembly 7 and the terminals it clamps to bend regularly, and the bending amplitude, speed and phase of the four terminals will be completely consistent. The counting component 12 includes a right-angle tongue 1201 installed at the top of one of the U-shaped carriages 52 and a slotted photoelectric counting sensor 1202 installed at one of the top corners of the platform 4. The output of the slotted photoelectric counting sensor 1202 is electrically connected to the input of the PLC control panel 13. During the reciprocating movement of one of the U-shaped carriages 52, the right-angle tongue 1201 will continuously enter and exit the slotted photoelectric counting sensor 1202. By using the number of reciprocations, the mechanical motion is directly converted into a digital signal and transmitted to the PLC control panel 13, so as to realize accurate and reliable counting of the number of bends.

[0021] Working Principle: First, the operator ensures the power and air supply connections are normal, and starts the equipment via the PLC control panel 13. The four plug workpieces to be tested are placed into the four independent positioning chambers 81 of the stable partitioned fixture table 8 on the upper part of the lower housing 1. During placement, ensure the plug workpieces are in the correct orientation, with their main body fully seated on the U-shaped support 82 of the positioning chamber 81, and the metal terminals to be tested facing the corresponding operating area below the adjustable clamping assembly 7. After loading, the operator triggers the clamping command on the PLC control panel 13, and the bidirectional linear drive assembly 10 begins to operate, producing… The linear driving force output is synchronously transmitted to the four workstations, driving the inclined block type opposing synchronous clamping assembly 9 in each positioning chamber 81 to work. The inclined block type opposing synchronous clamping assembly 9 firmly restrains the plug workpiece from the two main sides onto the U-shaped support 82. At this time, the initial clamping force on the four workpieces is completely synchronous and consistent. Then, the double-position pneumatic abutment assembly 11 is activated under the command of the PLC control panel 13. It stably abuts against the plug workpiece from the remaining direction perpendicular to the first two sides, forming three-point positioning and clamping, eliminating the shaking that may occur in the workpiece during subsequent bending. After the workpiece body is fixed, the operator... The operator activates the lifting assembly 3, causing the platform 4 to descend. The adjustable clamping components 7 mounted on the bending and retraction assembly 5 then descend and align with the exposed terminals to be tested at their respective workstations. The adjustable clamping components 7 firmly clamp the upper end of the terminals. The operator initiates the test command on the PLC control panel 13. The rotary drive assembly 6 synchronously outputs rotational power to the four bending and retraction assemblies 5 mounted on the platform 4. Each bending and retraction assembly 5 drives its corresponding adjustable clamping component 7 to reciprocate at a preset speed. The root of the clamped terminal thus endures repeated bending stress. Simultaneously, the counting assembly 12 counts each... The complete reciprocating cycle is accumulated and the real-time data is displayed on the PLC control panel 13. The test continues until the preset number of bends is reached or one or more terminals are observed to have broken. The operator reads the actual number of cycles on the PLC control panel 13 and shuts down the equipment. The rotary drive component 6 stops, the lifting component 3 rises and drives the platform 4 away from the tested terminals, the double-position pneumatic abutment component 11 retracts, and the bidirectional linear drive component 10 moves in the opposite direction to release the clamping force of the inclined block. The four tested workpieces are taken out of the positioning chamber 81 for final visual inspection and recording.

[0022] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A plug terminal bending tester for easy clamping and fixing, comprising a lower housing (1), an upper cover (2) mounted on the top of the lower housing (1) and equipped with a grating sensor at the feeding inlet, and a lifting assembly (3) mounted on the top of the upper cover (2), characterized in that: The top of the lower box (1) is fixed with a partition-type tooling table (8). The partition-type tooling table (8) has four positioning chambers (81). Each positioning chamber (81) has a U-shaped support (82) for supporting the plug workpiece fixed on the inner wall of one side near the vertical center reference plane of the partition-type tooling table (8). The positioning chamber (81) has a diagonal block type opposing synchronous clamping assembly (9) for fixing the plug workpiece from both sides. The bottom of the partition-type tooling table (8) is provided with a bidirectional linear drive assembly (10) for making the four diagonal block type opposing synchronous clamping assemblies (9) move synchronously. A double-position pneumatic abutment assembly (11) is installed at the front and rear positions of the top of the partition-type tooling table (8). The double-position pneumatic abutment assembly (11) abuts the plug workpiece from the remaining direction perpendicular to the two front sides. An adjustable clamping assembly (7) for fixing the plug terminal is provided above the positioning chamber (81). The platform (4) is located directly above the partitioned tooling table (8) and installed on the drive end of the lifting assembly (3). At the corner of the top of the platform (4), there is a bending and turning assembly (5) that drives the adjustable clamping assembly (7) to move along the width direction of the platform (4). A counting assembly (12) is provided on the top of the platform (4) on one side of the bending and turning assembly (5). A rotary drive assembly (6) is provided at the bottom of the platform (4) for synchronously outputting rotational power to the four bending and turning assemblies (5). A PLC control panel (13) is installed on one side of the surface of the upper cover (2). The output end of the PLC control panel (13) is electrically connected to the input end of the lifting assembly (3), the bidirectional linear drive assembly (10), the dual-position pneumatic abutment assembly (11), the rotary drive assembly (6), and the adjustable clamping assembly (7).

2. The plug terminal bending test machine for convenient clamping and fixing according to claim 1, characterized in that: The bidirectional linear drive assembly (10) includes a lead screw bidirectional linear module (1001) and a pair of outer beam plates (1002) spaced apart. The outer beam plates (1002) are connected to two inclined block type opposing synchronous clamping assemblies (9) on the same side. The lead screw bidirectional linear module (1001) is installed at the bottom end of the partitioned tooling table (8) along the width direction and drives the two outer beam plates (1002) to move towards each other.

3. The plug terminal bending test machine for convenient clamping and fixing according to claim 2, characterized in that: The inclined block type opposing synchronous clamping assembly (9) includes an inner beam plate (91), a connecting column (92), two wedge blocks (93) and two clamping blocks (94). The inner beam plate (91) is installed in the positioning chamber (81). The connecting column (92) is installed on one side of the outer wall of the inner beam plate (91), and one end of the connecting column (92) extends through to the outside of the partitioned tooling table (8) and is fixedly connected to the outer beam plate (1002). The two wedge blocks (93) are symmetrically fixed on the other side of the outer wall of the inner beam plate (91), and the opposite side outer walls of the two wedge blocks (93) are provided with inclined surfaces (931). The two clamping blocks (94) are distributed on both sides of the U-shaped support (82) and slide in cooperation with one side of the inner wall of the positioning chamber (81) through a track. The side outer wall of the clamping block (94) away from the U-shaped support (82) contacts the inclined surface (931) and is equipped with an elastic reset structure.

4. The plug terminal bending test machine for convenient clamping and fixing according to claim 3, characterized in that: The elastic reset structure includes a T-shaped rod (95) and a reset spring (96). The T-shaped rod (95) is installed on the left and right outer walls of the positioning chamber (81) and can move along the length of the clamping block (94). One end of the T-shaped rod (95) is fixed to one side of the outer wall of the clamping block (94). The reset spring (96) is fitted on the T-shaped rod (95) and located on the outside of the positioning chamber (81). The wedge block (93) has a U-shaped groove (932) inside, and the T-shaped rod (95) is located in the U-shaped groove (932).

5. A plug terminal bending test machine for easy clamping and fixing according to claim 3, characterized in that: The dual-position pneumatic contact assembly (11) includes a base (1101) fixed to the top of the partitioned tooling table (8), a pen-shaped cylinder (1103) mounted on the top of the base (1101) via an L-shaped bracket, and a slide (1102) slidably mounted on the top of the base (1101). The slide (1102) has a base plate (1104) bolted to both sides of the top of the slide (1102). The bottom of the base plate (1104) is equipped with an L-shaped clamping arm (1105). The lower end of the L-shaped clamping arm (1105) is located between the inner beam plate (91) and the U-shaped support (82). The top corner of the L-shaped clamping arm (1105) is provided with a notch (11051).

6. The plug terminal bending test machine for convenient clamping and fixing according to claim 1, characterized in that: The rotary drive assembly (6) includes two horizontal frames (61) fixed parallel to each other in the length direction of the bottom end of the platform (4), a drive shaft (62) rotatably mounted on the outer wall of the two horizontal frames (61) away from each other through a bearing seat, and a stepper motor (63) mounted on the outer wall of one side of one of the horizontal frames (61). The output shaft of the stepper motor (63) is fixed to the end of one of the drive shafts (62) through a coupling. A sprocket drive structure (64) is installed between the same end of the two drive shafts (62). An active bevel gear (65) is fixed on the outer circumferential surface of the drive shaft (62) below the bending and reversing assembly (5).

7. A plug terminal bending test machine for easy clamping and fixing according to claim 6, characterized in that: The adjustable clamping assembly (7) includes a lead screw manual module (71) installed on the drive end of the bending and reversing assembly (5), a vertical rod (72) on the moving end of the lead screw manual module (71), a first tensioning seat (73) installed at the lower position of the surface of the vertical rod (72), and a crossbar (74) fixed on the outer wall of one side of the first tensioning seat (73). A second tensioning seat (75) is installed at one end of the surface of the crossbar (74). A finger cylinder (76) is installed on the outer wall of one side of the second tensioning seat (75). The finger cylinder (76) is used to clamp the plug terminal. A straight groove (41) is provided on both sides of the top of the platform (4) along the width direction. The vertical rod (72) passes through the straight groove (41) and is located between the two horizontal frames (61).

8. A plug terminal bending test machine for easy clamping and fixing according to claim 7, characterized in that: The bending and reversing assembly (5) includes a U-shaped carriage (52) mounted on the top of the platform (4) along the width direction of the platform (4) via a guide rail, a driven bevel gear shaft (51) rotatably mounted on the top of the platform (4), and a V-shaped rocker arm (56) disposed on the outside of the driven bevel gear shaft (51). A short shaft (54) is rotatably mounted on one side of the top of the platform (4). The V-shaped rocker arm (56) and the short shaft (54) are fitted together by roller bearings. The lower end of the driven bevel gear shaft (51) is connected to the driving bevel gear shaft (54). The gears (65) mesh, and the upper cam (53) and lower cam (55) are stacked and fixed from top to bottom on the upper end of the driven bevel gear shaft (51). The first moving wheel (57) and the second moving wheel (510) are rotatably installed on the top end and the inner wall of one side of the V-shaped rocker arm (56). The first moving wheel (57) contacts the upper cam (53), and the second moving wheel (510) contacts the lower cam (55). The end of the V-shaped rocker arm (56) away from the short shaft (54) is movably connected to the U-shaped slide (52).

9. A plug terminal bending test machine for easy clamping and fixing according to claim 8, characterized in that: A notch (59) is provided on one inner wall of the U-shaped carriage (52), and a third moving wheel (58) is provided inside the notch (59). The lower end of the third moving wheel (58) is rotatably connected to the V-shaped rocker arm (56).

10. A plug terminal bending test machine for convenient clamping and fixing according to claim 8, characterized in that: The counting assembly (12) includes a right-angle tongue (1201) mounted on the top of one of the U-shaped carriages (52) and a slotted photoelectric counting sensor (1202) mounted at one of the top corners of the platform (4). The output of the slotted photoelectric counting sensor (1202) is electrically connected to the input of the PLC control panel (13).

Images