A double-station automatic test device for locked-rotor torque and rotational speed

Abstract

The application discloses a double-station stuck torque and rotating speed automatic testing equipment, and relates to the technical field of torque gun testing equipment, which comprises a lower testing table and at least two torque gun fixed testing units arranged on the lower testing table; each of the torque gun fixed testing units comprises a product limiting block, on which a profiled mounting groove is formed and matches the shape of a product to be tested; a fixed air cylinder, whose extension direction is perpendicular to the extension direction of the profiled mounting groove, is arranged to press the product to be tested from the side; and a product-to-position inductive sensor is arranged to detect whether the product to be tested is installed in place. The application completely replaces manual holding, fundamentally eliminates the risk of tool slipping or sliding due to reaction force during the testing process, improves the operation safety, and realizes preliminary accurate positioning by matching the profiled mounting groove with the shape of the product to be tested, so that the product output shaft, the torque testing head and the transmission shaft can be kept in high concentricity.

Description

Technical Field

[0001] This invention relates to the technical field of torque gun testing equipment, specifically to a dual-station automatic testing device for stall torque and speed. Background Technology

[0002] In the field of electric and pneumatic tool manufacturing, torque guns are important fastening and assembly tools. The accuracy and consistency of their output torque and speed parameters directly affect the quality and reliability of the assembly process. Therefore, accurately testing the stall torque and operating speed of torque guns before production or during periodic calibration is a crucial step in ensuring product performance meets standards and guaranteeing safe end-user use.

[0003] Currently, the industry generally uses semi-automated or manually assisted testing methods based on single-station test benches for testing such tools. A common testing procedure involves the operator holding a torque gun, manually aligning it with the test shaft, and then starting the tool to collect speed and torque data via connected sensors. During the test, gear shifting, forward and reverse rotation testing, and the application of stall conditions largely rely on manual judgment and operation. Although some equipment is equipped with basic data acquisition systems, the continuity and automation of the testing process are limited, allowing only a single test of a single product to be completed at a time.

[0004] However, existing technologies have shortcomings in practice: First, they involve many manual interventions, especially during high-torque stall tests, posing a safety hazard as the tool may slip or fall due to reaction forces. Second, manual alignment makes it difficult to ensure precise concentricity between the product's output shaft and the test sensor's shaft. This introduces off-center loading or misalignment errors, directly affecting the accuracy of torque measurements and potentially leading to misjudgments of qualified products or missed detections of defective ones. Third, the testing process relies on manual operation and recording, resulting in low efficiency, and test results are easily affected by the operator's skill and condition, making repeatability and consistency difficult to guarantee. Finally, existing equipment typically only supports single-machine sequential testing, failing to meet the production line's need for simultaneous and efficient testing of multiple tools, becoming a bottleneck for improving overall inspection efficiency and capacity. Therefore, the industry urgently needs an automated solution that can achieve safe, accurate, and efficient multi-station parallel testing. Summary of the Invention

[0005] The technical problem to be solved by this invention is to overcome the existing defects and provide a dual-station automatic test device for stall torque and speed, which completely replaces manual hand operation and fundamentally eliminates the risk of the tool slipping or falling off due to reaction force during the test, thus improving operational safety. At the same time, the contour mounting groove matches the shape of the product being tested, achieving preliminary accurate positioning and ensuring that the product output shaft, torque test head, and transmission shaft maintain a high degree of concentricity, which can effectively solve the problems in the background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a dual-station automatic testing device for stall torque and speed, comprising a lower testing platform and at least two torque gun fixing testing units disposed on the lower testing platform: Each of the aforementioned torque gun fixing test units includes: The product limiting block has a contour mounting groove that matches the shape of the product being tested. A fixed cylinder, whose extension and retraction direction is perpendicular to the extension direction of the contour mounting groove, is used to press the product under test from the side. Product placement sensor is used to detect whether the product being tested is installed in place. Trigger-activated cylinder, used to simulate pressing the trigger of the product under test; The torque test head is connected to the output shaft of the product being tested. Torque sensors and rotary encoders are used to acquire torque and speed signals in real time; A stall component used to apply stall load during testing; The gear shifting mechanism and the forward / reverse shifting mechanism are used to automatically adjust the working state of the product under test; The PLC controller is electrically connected to the product positioning sensor, fixing cylinder, trigger-activated cylinder, torque sensor, rotary encoder, stall assembly, gear shifting mechanism, and forward / reverse switching mechanism, and is used to coordinate and control the entire testing process. The operator places the torque gun into the contour mounting slot of the product limit block. After the product positioning sensor detects the product, it sends a signal to the PLC controller. The PLC controller then controls the fixing cylinder to extend and press the product, achieving automatic fixing. Subsequently, the PLC controller controls the trigger-activated cylinder to simulate pressing the trigger, starting the torque gun. During the test, the torque sensor and rotary encoder collect torque and speed signals in real time. The stall assembly applies a stall load, and the gear shifting mechanism and forward / reverse switching mechanism automatically adjust the working state of the torque gun. The PLC controller coordinates all units to complete the fully automated testing process.

[0007] Furthermore, the input shaft of the torque sensor is provided with a transmission shaft extending towards the product limiting block. The torque test head is located at the end of the transmission shaft opposite to the product limiting block. The output shaft of the torque sensor is connected to the input shaft of the rotary encoder via a connecting shaft. A stall block is provided on the connecting shaft. The output ends of both the rotary encoder and the torque sensor are electrically connected to the input end of the PLC controller. After the torque gun is started, its output shaft drives the transmission shaft to rotate via the torque test head. The transmission shaft transmits torque to the torque sensor, which detects the torque signal in real time. Simultaneously, the rotational motion is transmitted to the rotary encoder via the connecting shaft for measuring the rotational speed. The stall block on the connecting shaft cooperates with the stall assembly to achieve stall testing.

[0008] Furthermore, the stall assembly includes a stall bracket mounted on the lower test bench and a stall cylinder mounted on the stall bracket. The extension end of the stall cylinder is equipped with a stall head, which engages with the stall block. The input end of the stall cylinder is electrically connected to the output end of the PLC controller. When a stall test is required, the PLC controller controls the stall cylinder to extend, pushing the stall head forward to contact the stall block, thus putting the system into a stall state. At this time, the torque sensor records the peak value of the maximum stall torque.

[0009] Furthermore, each torque gun fixing test unit also includes a mounting bracket. The product limiting block, product positioning sensor, fixing cylinder, and trigger starting cylinder are all mounted on the mounting bracket. The product limiting block is positioned above the trigger starting cylinder, and the fixing cylinder is positioned to the side of the product limiting block. The side of the product limiting block has a through hole for the telescopic end of the fixing cylinder to extend into and press the product under test. The mounting bracket integrates the product limiting block, product positioning sensor, fixing cylinder, and trigger starting cylinder. The product limiting block is located above the trigger starting cylinder, and the fixing cylinder is positioned to the side of the product limiting block. The telescopic end of the fixing cylinder extends into and presses the product under test through the through hole on the side of the product limiting block.

[0010] Furthermore, the forward / reverse switching mechanism includes a first forward / reverse switching cylinder and a second forward / reverse switching cylinder mounted on the mounting bracket. The extension and retraction ends of the first and second forward / reverse switching cylinders are correspondingly arranged to cooperate with the forward / reverse adjustment part of the product under test. The extension and retraction ends of the first and second forward / reverse switching cylinders are correspondingly arranged and work together under the control of the PLC controller to push the forward / reverse adjustment button on the torque gun, realizing automatic switching between forward and reverse rotation.

[0011] Furthermore, the gear switching mechanism includes a gear cylinder disposed on the side of the product limiting block. The telescopic end of the gear cylinder is provided with a gear adjusting block, and the side of the gear adjusting block opposite to the product limiting block is provided with a gear adjusting pin for engaging with the gear adjusting part of the product being tested. The telescopic end of the gear cylinder drives the gear adjusting block, and the gear adjusting pin on the gear adjusting block, under the action of the cylinder, pushes the gear adjusting key on the torque gun, realizing automatic switching between first and second gear.

[0012] Furthermore, the product limiting block is provided with an adjusting column guide block, through which the gear adjusting column passes, and the guiding direction of the adjusting column guide block is consistent with the extension and retraction direction of the gear adjusting column. The adjusting column guide block is located on the product limiting block, and the gear adjusting column passes through it. The adjusting column guide block guides the extension and retraction movement of the gear adjusting column, ensuring that it accurately acts on the gear adjusting part of the torque gun.

[0013] Furthermore, the system includes an upper cover that covers the lower test platform, with an opening on one side. The two torque gun fixing test units are configured to mate with the opening side of the upper cover. A touchscreen, a work indicator light, a start button, and an emergency stop button are mounted on the outer wall of the upper cover. The PLC controller is mounted on the inner wall of the upper cover. The outputs of the touchscreen, the start button, and the emergency stop button are electrically connected to the inputs of the PLC controller. The input of the work indicator light is electrically connected to the output of the PLC controller. The upper cover covers the lower test platform, and its opening side facilitates the operator's insertion and removal of the torque gun. The touchscreen and start button trigger the test process, the emergency stop button is used for emergency stopping, the work indicator light displays the equipment status, and the PLC controller receives signals from the touchscreen, the start button, and the emergency stop button, and controls the work indicator light.

[0014] Furthermore, the lower surface of the lower test platform is provided with an adjustable support leg assembly. The adjustable support leg assembly includes fixing nuts located at the four corners of the lower surface of the lower test platform. A vertically downward extending connecting screw is threaded onto the fixing nut, and an adjusting nut is threaded onto the lower end of the connecting screw. The lower surface of the adjusting nut is provided with a support leg. By rotating the support leg, the height of the support leg can be adjusted to adapt to the flatness of the ground, ensuring stable placement of the equipment.

[0015] Based on the above technical solution, the beneficial effects of the dual-station stall torque and speed automatic testing equipment of the present invention, after practical application, are as follows: 1. This invention achieves automatic clamping and fixing of the product under test through a product limiting block and a fixing cylinder, completely replacing manual hand-held operation. It fundamentally eliminates the risk of the tool slipping or falling off due to reaction force during the testing process. The trigger-activated cylinder replaces manual pressing to start, further reducing the necessity of manual contact with the testing tool and improving operational safety.

[0016] 2. The contour mounting groove on the product limiting block in this invention matches the shape of the product being tested, achieving preliminary accurate positioning. The fixing cylinder applies clamping force in a direction perpendicular to the product axis. Combined with the contour mounting groove, it ensures that the product output shaft, torque test head, and transmission shaft maintain high concentricity, thereby significantly reducing measurement errors caused by off-center load and improving the accuracy and reliability of data collected by the torque sensor and rotary encoder.

[0017] 3. The product placement sensor in this invention automatically detects the product being placed, triggering subsequent processes and reducing manual judgment. Simultaneously, automatic switching of gear and rotation direction is achieved through gear cylinders, a first forward / reverse switching cylinder, and a second forward / reverse switching cylinder. The stall cylinder drives the stall head to perform automatic stall testing. Therefore, all torque gun tests are uniformly coordinated and controlled by a PLC controller. The test process, data acquisition, and result judgment are all set and automatically completed through a touchscreen, greatly improving testing efficiency and completely eliminating the impact of human factors on the consistency and repeatability of test results. The equipment automatically completes the entire process of product fixing, trigger activation, gear switching, forward / reverse switching, stall loading, and data acquisition. Only one operator is needed to handle the loading and unloading of the torque gun. Multi-station parallel operation further reduces the manual labor time per unit product, saving labor costs.

[0018] 4. This invention sets up at least two completely independent torque gun fixed test units on the lower test platform, forming a true dual-station test. It can test two torque guns simultaneously, doubling the number of tests completed per unit time, significantly shortening the testing cycle of batch products, increasing production speed, and improving testing efficiency. The dual stations can work in parallel under the unified scheduling of the PLC controller, supporting two products to be tested fully automatically at the same time, realizing parallel testing, thereby doubling the testing capacity, effectively breaking through the bottleneck of production line testing efficiency. Moreover, dual-station testing can simultaneously obtain two sets of test data under the same environmental conditions, which is convenient for direct comparison and analysis, timely detection of product consistency differences, and providing a reliable basis for quality control and production process improvement. Attached Figure Description

[0019] Figure 1 This is a front-view stereoscopic structural diagram of the present invention.

[0020] Figure 2 This is a right-side stereoscopic view of the structure of the present invention after the upper box has been removed.

[0021] Figure 3 This is a left-side stereoscopic view of the structure of the present invention after the upper box has been removed.

[0022] Figure 4 For the present invention Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0023] Figure 5 This is a bottom-view three-dimensional structural diagram of the present invention after the upper box body has been removed.

[0024] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure at point B in the middle.

[0025] In the diagram: 1-Lower test platform, 2-Upper cover, 3-Touch screen, 4-Work indicator light, 5-Start button, 6-Emergency stop button, 7-Stalling bracket, 8-Stalling cylinder, 9-Stalling head, 10-Torque sensor, 11-Product position sensor, 12-Gear cylinder, 13-Product limit block, 14-Contouring mounting slot, 15-Fixing cylinder, 16-First forward / reverse switching cylinder, 17-Mounting bracket, 18-Trigger start cylinder, 19-Second forward / reverse switching cylinder, 20-Connecting screw, 21-Adjusting nut, 22-Support leg, 23-Rotary encoder, 24-Stalling block, 25-Connecting shaft, 26-Transmission shaft, 27-Gear adjustment block, 28-Gear adjustment column, 29-Adjusting column guide block, 30-Torque test head, 31-Fixing nut. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1-6 This embodiment provides a technical solution: a dual-station automatic testing device for stall torque and speed, comprising a lower test platform 1 and at least two torque gun fixed testing units disposed on the lower test platform 1. Each torque gun fixed test unit includes: The product limiting block 13 has a contour mounting groove 14 that matches the shape of the product being tested. The fixed cylinder 15 extends and retracts in a direction perpendicular to the extension direction of the contour mounting groove 14, and is used to press the product under test from the side. Product positioning sensor 11 is used to detect whether the product being tested is installed in place; Trigger-activated cylinder 18 is used to simulate pressing the trigger of the product under test; The torque test head 30 is connected to the output shaft of the product under test. Torque sensor 10 and rotary encoder 23 are used to acquire torque and speed signals in real time; A stall component used to apply stall load during testing; The gear shifting mechanism and the forward / reverse shifting mechanism are used to automatically adjust the working state of the product under test; The PLC controller is electrically connected to the product positioning sensor 11, the fixing cylinder 15, the trigger-activated cylinder 18, the torque sensor 10, the rotary encoder 23, the stall assembly, the gear shifting mechanism, and the forward / reverse switching mechanism, and is used to coordinate and control the entire testing process. The operator places the torque gun into the contour mounting slot 14 of the product limit block 13. After the product positioning sensor 11 detects the product, it sends a signal to the PLC controller. The PLC controller then controls the fixing cylinder 15 to extend and press the product, achieving automatic fixing. Subsequently, the PLC controller controls the trigger-activated cylinder 18 to simulate pressing the trigger, starting the torque gun. During the test, the torque sensor 10 and the rotary encoder 23 collect torque and speed signals in real time. The stall assembly applies a stall load, and the gear shifting mechanism and the forward / reverse switching mechanism automatically adjust the working state of the torque gun. The PLC controller coordinates all units to complete the fully automated testing process.

[0028] Furthermore, the input shaft of the torque sensor 10 is provided with a transmission shaft 26 extending towards the product limit block 13. A torque test head 30 is provided at the end of the transmission shaft 26 opposite to the product limit block 13. The output shaft of the torque sensor 10 is connected to the input shaft of the rotary encoder 23 via a connecting shaft 25. A stall block 24 is provided on the connecting shaft 25. The output ends of both the rotary encoder 23 and the torque sensor 10 are electrically connected to the input end of the PLC controller. After the torque gun is started, its output shaft drives the transmission shaft 26 to rotate via the torque test head 30. The transmission shaft 26 transmits torque to the torque sensor 10, which detects the torque signal in real time. Simultaneously, the rotational motion is transmitted to the rotary encoder 23 via the connecting shaft 25 for measuring the rotational speed. The stall block 24 on the connecting shaft 25 is used to cooperate with the stall assembly to achieve stall testing.

[0029] Furthermore, the stall assembly includes a stall bracket 7 mounted on the lower test bench 1 and a stall cylinder 8 mounted on the stall bracket 7. The extension end of the stall cylinder 8 is equipped with a stall head 9, which cooperates with the stall block 24. The input end of the stall cylinder 8 is electrically connected to the output end of the PLC controller. When a stall test is required, the PLC controller controls the stall cylinder 8 to extend, pushing the stall head 9 forward to contact the stall block 24, causing the system to enter a stall state. At this time, the torque sensor 10 records the peak value of the maximum stall torque.

[0030] Furthermore, each torque gun fixing test unit also includes a mounting bracket 17. A product limiting block 13, a product positioning sensor 11, a fixing cylinder 15, and a trigger-activated cylinder 18 are all mounted on the mounting bracket 17. The product limiting block 13 is positioned above the trigger-activated cylinder 18, and the fixing cylinder 15 is positioned to the side of the product limiting block 13. The side of the product limiting block 13 has a through hole for the telescopic end of the fixing cylinder 15 to extend into and press the product under test. The mounting bracket 17 integrates and mounts the product limiting block 13, the product positioning sensor 11, the fixing cylinder 15, and the trigger-activated cylinder 18. The product limiting block 13 is located above the trigger-activated cylinder 18, and the fixing cylinder 15 is positioned to the side of the product limiting block 13. The telescopic end of the fixing cylinder 15 extends into and presses the product under test through the through hole on the side of the product limiting block 13.

[0031] Furthermore, the forward / reverse switching mechanism includes a first forward / reverse switching cylinder 16 and a second forward / reverse switching cylinder 19 mounted on the mounting bracket 17. The telescopic ends of the first forward / reverse switching cylinder 16 and the second forward / reverse switching cylinder 19 are correspondingly arranged to cooperate with the forward / reverse adjustment part of the product under test. The telescopic ends of the first forward / reverse switching cylinder 16 and the second forward / reverse switching cylinder 19 are correspondingly arranged and work together under the control of the PLC controller to push the forward / reverse adjustment button on the torque gun, realizing automatic switching between forward and reverse rotation.

[0032] Furthermore, the gear shifting mechanism includes a gear shift cylinder 12 disposed on the side of the product limit block 13. A gear shift adjustment block 27 is disposed on the telescopic end of the gear shift cylinder 12. A gear shift adjustment column 28 is disposed on the side of the gear shift adjustment block 27 opposite to the product limit block 13, for cooperating with the gear shift adjustment part of the product being tested. The telescopic end of the gear shift cylinder 12 drives the gear shift adjustment block 27, and the gear shift adjustment column 28 on the gear shift adjustment block 27 pushes the gear shift adjustment key on the torque gun under the action of the cylinder, realizing automatic switching between first and second gear.

[0033] Furthermore, the product limiting block 13 is provided with an adjusting column guide block 29, through which the gear adjusting column 28 passes, and the guiding direction of the adjusting column guide block 29 is consistent with the extension and retraction direction of the gear adjusting column 28. The adjusting column guide block 29 is located on the product limiting block 13, and the gear adjusting column 28 passes through it. The adjusting column guide block 29 guides the extension and retraction movement of the gear adjusting column 28, ensuring that it accurately acts on the gear adjusting part of the torque gun.

[0034] Furthermore, it also includes an upper cover 2 that is mounted on the lower test platform 1, with an opening on one side. Two torque gun fixing test units are configured to cooperate with the opening side of the upper cover 2. A touch screen 3, a working indicator light 4, a start button 5, and an emergency stop button 6 are provided on the outer wall of the upper cover 2. A PLC controller is provided on the inner wall of the upper cover 2, and the output terminals of the touch screen 3, start button 5, and emergency stop button 6 are all electrically connected to the input terminals of the PLC controller. The input terminal of the working indicator light 4 is electrically connected to the output terminal of the PLC controller. The upper cover 2 is mounted on the lower test platform 1, and its open side facilitates the operator to put in and take out the torque gun. The touch screen 3 and start button 5 are used to trigger the test process, the emergency stop button 6 is used for emergency stop, the working indicator light 4 displays the equipment status, and the PLC controller receives signals from the touch screen 3, start button 5, and emergency stop button 6 and controls the working indicator light 4.

[0035] Furthermore, the lower surface of the lower test platform 1 is provided with an adjustable support leg assembly. The adjustable support leg assembly includes fixing nuts 31 located at the four corners of the lower surface of the lower test platform 1. The fixing nuts 31 are threaded with vertically downward extending connecting screws 20. The lower end of the connecting screws 20 is threaded with an adjusting nut 21, and the lower surface of the adjusting nut 21 is provided with a support leg 22. By rotating the support leg 22, the height of the support leg 22 can be adjusted to adapt to the flatness of the ground and ensure that the equipment is placed stably.

[0036] The working principle of the dual-station stall torque and speed automatic testing device provided by this invention is as follows: In use, the product to be tested, i.e., the torque gun, is first placed into the contour mounting groove 14 of the product limiting block 13 at one or two stations. When the product is in place, the product positioning sensor 11 detects the signal and sends it to the PLC controller. Subsequently, the PLC controller issues a command to control the extension of the fixing cylinder 15 at the corresponding station, automatically pressing and fixing the product to ensure stability and safety during the test. The test process is triggered by the operator through the touch screen 3 or the start button 5. The PLC controller starts the fully automatic test cycle according to the preset "first gear priority, forward rotation priority" logic. The first forward / reverse switching cylinder 16 activates, setting the product to forward rotation mode. The trigger start cylinder 18 activates, starting the product. The product output shaft drives the torque test head 30 and the transmission shaft 26 to rotate. The rotary encoder 23 measures the forward rotation speed in real time, maintaining the forward rotation state. The PLC controls the stall cylinder 8 to push the stall head 9 to block the stall block 24, putting the product into a stall state. The torque sensor 10 detects and records the maximum peak value of the stall torque in the first forward rotation. After completion, the stall cylinder 8 retracts, and the second forward / reverse switching cylinder 19 activates, switching the product to reverse rotation mode. The trigger start cylinder... Cylinder 18 restarts the product. Rotary encoder 23 measures the first-gear reverse rotation speed. Maintaining the reverse state, the stall test process is repeated. Torque sensor 10 records the maximum peak torque of the first-gear reverse stall. The PLC controller controls the gear cylinder 12 to move, switching the product to the second gear position via gear adjustment block 27 and gear adjustment column 28. Subsequently, the above sub-processes of forward rotation test, forward stall test, reverse rotation test, and reverse stall test are strictly repeated to sequentially complete the second-gear forward rotation speed, the second-gear forward stall torque maximum peak, the second-gear reverse rotation speed, and the second-gear reverse stall torque maximum peak. Measurement is performed, and the entire test cycle ends. All test data is automatically collected, processed, and stored by the PLC controller, and can be displayed or exported via the touch screen 3. The above process is executed independently at a single workstation. Under the unified scheduling and online communication control of the PLC controller, the two workstations can execute the above fully automatic test process synchronously, realizing the synchronous operation and testing of the speed, direction of rotation, and torque of the two machines, which greatly improves the overall testing efficiency. Throughout the process, the equipment status is indicated by the working indicator light 4, and the emergency stop button 6 is used to deal with emergencies. After the test is completed, the fixed cylinder 15 retracts, and the product can be taken out.

[0037] The above description is merely an embodiment of the present invention and does not limit the scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the protection scope of the present invention.

Claims

1. A dual-station automatic testing device for stall torque and speed, comprising a lower test platform (1) and at least two torque gun fixed testing units disposed on the lower test platform (1), characterized in that: Each of the aforementioned torque gun fixing test units includes: The product limiting block (13) has a contour mounting groove (14) that matches the shape of the product being tested. A fixed cylinder (15) is used to press the product under test from the side, with its extension direction perpendicular to the extension direction of the contour mounting groove (14). Product positioning sensor (11) is used to detect whether the product being tested is installed in place; Trigger-activated cylinder (18) is used to simulate pressing the trigger of the product under test; The torque test head (30) is connected to the output shaft of the product under test; Torque sensor (10) and rotary encoder (23) are used to acquire torque and speed signals in real time; A stall component used to apply stall load during testing; The gear shifting mechanism and the forward / reverse shifting mechanism are used to automatically adjust the working state of the product under test; The PLC controller is electrically connected to the product positioning sensor (11), the fixed cylinder (15), the trigger start cylinder (18), the torque sensor (10), the rotary encoder (23), the stall assembly, the gear switching mechanism, and the forward and reverse switching mechanism, and is used to coordinate and control the entire test process.

2. The dual-station stall torque and speed automatic testing equipment according to claim 1, characterized in that: The torque sensor (10) has a transmission shaft (26) extending toward the product limiting block (13) on its input shaft. The torque test head (30) is provided at the end of the transmission shaft (26) opposite to the product limiting block (13). The output shaft of the torque sensor (10) is connected to the input shaft of the rotary encoder (23) through a connecting shaft (25). A stall block (24) is provided on the connecting shaft (25). The output ends of the rotary encoder (23) and the torque sensor (10) are both electrically connected to the input end of the PLC controller.

3. The dual-station stall torque and speed automatic testing equipment according to claim 2, characterized in that: The stall assembly includes a stall bracket (7) mounted on the lower test bench (1) and a stall cylinder (8) mounted on the stall bracket (7). The extension end of the stall cylinder (8) is provided with a stall head (9), and the stall head (9) cooperates with the stall block (24). The input end of the stall cylinder (8) is electrically connected to the output end of the PLC controller.

4. The dual-station stall torque and speed automatic testing equipment according to claim 1, characterized in that: Each torque gun fixing test unit also includes a mounting bracket (17). The product limiting block (13), product positioning sensor (11), fixing cylinder (15) and trigger starting cylinder (18) are all mounted on the mounting bracket (17). The product limiting block (13) is located above the trigger starting cylinder (18). The fixing cylinder (15) is located on the side of the product limiting block (13). The side of the product limiting block (13) has a through hole for the telescopic end of the fixing cylinder (15) to extend into and press the product under test.

5. The dual-station stall torque and speed automatic testing equipment according to claim 4, characterized in that: The forward / reverse switching mechanism includes a first forward / reverse switching cylinder (16) and a second forward / reverse switching cylinder (19) mounted on the mounting bracket (17), and the extension and retraction ends of the first forward / reverse switching cylinder (16) and the second forward / reverse switching cylinder (19) are correspondingly arranged to cooperate with the forward / reverse adjustment part of the product under test.

6. The dual-station stall torque and speed automatic testing equipment according to claim 4, characterized in that: The gear shifting mechanism includes a gear cylinder (12) disposed on the side of the product limit block (13). The extension end of the gear cylinder (12) is provided with a gear adjustment block (27). The gear adjustment block (27) is provided with a gear adjustment column (28) on the side opposite to the product limit block (13) for cooperating with the gear adjustment part of the product being tested.

7. The dual-station stall torque and speed automatic testing equipment according to claim 6, characterized in that: The product limiting block (13) is provided with an adjustment column guide block (29), the gear adjustment column (28) passes through the adjustment column guide block (29), and the guiding direction of the adjustment column guide block (29) is consistent with the extension and retraction direction of the gear adjustment column (28).

8. The dual-station stall torque and speed automatic testing equipment according to claim 1, characterized in that: It also includes an upper cover (2) covering the lower test platform (1), and the upper cover (2) has an opening on one side. The two torque gun fixing test units are configured to cooperate with the opening side of the upper cover (2). The outer side wall of the upper cover (2) is provided with a touch screen (3), a work indicator (4), a start button (5) and an emergency stop button (6). The inner side wall of the upper cover (2) is provided with the PLC controller. The output terminals of the touch screen (3), the start button (5) and the emergency stop button (6) are all electrically connected to the input terminal of the PLC controller. The input terminal of the work indicator (4) is electrically connected to the output terminal of the PLC controller.

9. The dual-station stall torque and speed automatic testing equipment according to claim 1, characterized in that: The lower surface of the lower test platform (1) is provided with an adjustable support leg assembly. The adjustable support leg assembly includes a fixing nut (31) at the four corners of the lower surface of the lower test platform (1). The fixing nut (31) is threaded with a vertically downward extending connecting screw (20). The lower end of the connecting screw (20) is threaded with an adjusting nut (21), and the lower surface of the adjusting nut (21) is provided with a support leg (22).

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