Multi-range microcomputer controlled spring tensile testing machine

Abstract

The utility model discloses a kind of multi-range microcomputer control spring tensile testing machine, it is related to spring detection equipment technical field, to solve the inconvenient handling, the low maintenance efficiency problem caused by the fixed connection of existing testing machine lifting plate and drive system. Its technical scheme includes fixed frame, control box and drive motor are installed on fixed frame, transmission groove is equipped in the bottom of fixed frame, transmission shaft is rotatably arranged in transmission groove, two screw rods are rotatably arranged on fixed frame, and screw rod is connected with transmission shaft through bevel gear;Nut is arranged on screw rod through limiting rod, and two nuts are connected lifting plate through plug block and slot;Lifting plate and fixed frame are each equipped with extruding block and draw hook, and lifting plate is equipped with movable slot, and movable slot is equipped with positioning frame through spring, and fixed frame is equipped with positioning slot. Drive motor drives transmission shaft and screw rod to rotate, nut drives lifting plate to lift, realizes spring stretching and extrusion test;Toggle positioning frame can dismantle lifting plate, convenient to handle and maintain.

Description

Technical Field

[0001] This utility model relates to the technical field of spring mechanical property testing equipment, and in particular to a multi-range microcomputer-controlled spring tension and compression testing machine. Background Technology

[0002] In the field of spring production and application, spring tension and compression testing machines are core equipment for verifying the mechanical properties of springs (such as stiffness, elastic limit, and load-bearing capacity). Existing spring tension and compression testing machines typically use a frame as the basic carrier, coupled with a drive mechanism (such as a motor or screw) to achieve the loading action. The spring is fixed by clamps (such as hooks or compression blocks), and then combined with force sensors, displacement measurement components, and a microcomputer control system, the machine completes the data acquisition, analysis, and recording during the spring's tension or compression process to determine whether the spring meets design standards or industry requirements. These machines are widely used in quality control and R&D processes in industries such as machinery, automotive, and electronics.

[0003] Existing spring tension and compression testing machines have certain limitations in their structural design: On the one hand, the lifting and loading components of the equipment (such as the lifting plate that drives the clamps to move) are mostly fixedly connected to the drive system (such as screws and nuts) (such as by welding or bolting). When the equipment needs to be moved and transported, the overall structure formed by the lifting plate and the drive system is quite heavy, which not only increases the difficulty of handling, but may also damage the precision components due to vibration during the handling process. On the other hand, the fixed connection structure makes it difficult to disassemble the lifting plate. When it is necessary to maintain or replace the lifting plate itself (or the clamps it is mounted on), or to repair the drive components such as screws and nuts, the operating space is limited, and it takes a lot of time to disassemble the overall structure, which reduces the efficiency of equipment maintenance. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a multi-range microcomputer-controlled spring tension and compression testing machine.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A multi-range microcomputer-controlled spring tension and compression testing machine includes a fixed frame, on which a control box is mounted. The bottom of the fixed frame has a transmission groove. Two screws extending into the transmission groove are rotatably mounted on the fixed frame. A transmission shaft is rotatably mounted within the transmission groove. The screws are connected to the transmission shaft via a transmission mechanism. A drive motor is mounted on the fixed frame. Nuts are threaded onto the screws via a limiting mechanism. A lifting plate is mounted on both nuts via an insertion mechanism. Compression blocks and hooks are mounted on both the fixed frame and the lifting plate. The lifting plate has a movable groove, within which a sliding rod is located. A positioning frame is slidably mounted on the sliding rod via an elastic mechanism. The fixed frame has a positioning groove.

[0006] Preferably, the transmission mechanism includes a first gear fixedly mounted on a transmission shaft, and a second gear meshing with the first gear is mounted on the screw.

[0007] Preferably, the limiting mechanism includes a limiting rod fixedly installed on a fixed frame, and the limiting rod slides through the nut.

[0008] Preferably, the insertion mechanism includes a plug fixedly mounted on a nut, and the lifting plate is provided with a slot corresponding to the plug.

[0009] Preferably, the elastic mechanism includes a spring sleeved and installed outside the slide bar, with both ends of the spring connected to the inner wall of the movable groove and the outer wall of the positioning frame, respectively.

[0010] Preferably, both the first gear and the second gear are bevel gears, the lifting plate is provided with a connecting groove, and the slot is provided on the inner wall of the connecting groove.

[0011] The beneficial effects of this utility model are: The lifting plate and nut are detachably connected via an interlocking mechanism, while a flexible mechanism enables quick limiting and unlocking of the lifting plate. Moving the positioning bracket releases the limit, allowing the lifting plate and nut to disengage horizontally. After disassembly, the weight of each component is more dispersed, facilitating individual handling and avoiding operational inconvenience caused by excessive weight during overall transport. It also reduces the risk of damage to precision components due to vibration.

[0012] The detachable design of the lifting plate provides ample operating space for equipment maintenance. After the lifting plate is removed, it can be quickly maintained or replaced, as well as the pressing blocks and hooks mounted on it. It can also be directly inspected and repaired, such as the screw and drive shaft in the transmission groove, without disassembling the overall structure of the equipment, which greatly shortens the maintenance time and improves the ease of use of the equipment.

[0013] In the drive system, the transmission shaft drives two screws to rotate synchronously through vertical meshing of bevel gears. In conjunction with the limiting mechanism, the rotation of the nut is restricted, allowing only vertical movement. This ensures that the lifting plate rises and falls smoothly during loading, avoiding spring offset caused by uneven force. At the same time, the elastic mechanism uses spring force to stably engage the positioning frame in the positioning groove, ensuring a firm connection between the lifting plate and the nut during testing. This further improves the stability of the testing process and ensures the accuracy of mechanical data acquisition. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the multi-range microcomputer-controlled spring tension and compression testing machine proposed in this utility model; Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure; Figure 3 for Figure 2Enlarged schematic diagram of the structure at point A; Figure 4 This is a schematic diagram of the structure of components such as the drive shaft inside the transmission groove; Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point B.

[0015] In the diagram: 1. Fixed frame, 2. Control box, 3. Screw, 4. Nut, 5. Limit rod, 6. Lifting plate, 7. Connecting groove, 8. Pressing block, 9. Hook, 10. Positioning groove, 11. Insert block, 12. Slot, 13. Movable groove, 14. Positioning frame, 15. Slide rod, 16. Spring, 17. Transmission groove, 18. Transmission shaft, 19. Drive motor, 20. First gear, 21. Second gear. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Reference Figure 1-5 The multi-range microcomputer-controlled spring tension and compression testing machine includes a fixed frame 1, on which a control box 2 is installed. The control box 2 contains control components used to control the start and stop of the drive motor 19, etc. The device also includes existing mature components such as multi-range force sensors and grating rulers, as well as a control cabinet, computer and testing software, which are responsible for receiving sensor data and displaying results, etc. Since the above components are all existing mature products and are not the core technology of this solution, they will not be described in detail in this solution.

[0018] The bottom of the fixed frame 1 is provided with a transmission groove 17. Two screws 3 are rotatably mounted on the fixed frame 1 and extend into the transmission groove 17. A transmission shaft 18 is rotatably mounted in the transmission groove 17. The screws 3 are connected to the transmission shaft 18 through a transmission mechanism. A drive motor 19 is mounted on the fixed frame 1. Nuts 4 are threadedly fitted on the screws 3 through a limiting mechanism. Lifting plates 6 are mounted on the two nuts 4 through an insertion mechanism. Both the fixed frame 1 and the lifting plate 6 are equipped with pressing blocks 8 and hooks 9. The lifting plate 6 is provided with a movable groove 13. A sliding rod 15 is provided in the movable groove 13. A positioning frame 14 is slidably fitted on the sliding rod 15 through an elastic mechanism. The fixed frame 1 is provided with a positioning groove 10.

[0019] The transmission mechanism includes a first gear 20 fixedly mounted on a transmission shaft 18, and a second gear 22 meshing with the first gear 20 mounted on a screw 3. Both the first gear 20 and the second gear 22 are bevel gears. The meshing method between the first gear 20 and the second gear 21 is perpendicular meshing.

[0020] The limiting mechanism includes a limiting rod 5 fixedly installed on the fixed frame 1. The limiting rod 5 slides through the nut 4. The function of the limiting rod 5 is to limit the nut 4 and prevent it from rotating with the screw 3.

[0021] The engagement mechanism includes a plug 11 fixedly mounted on a nut 4, a slot 12 corresponding to the plug 11 on a lifting plate 6, and a connecting groove 7 on the lifting plate 6. The slot 12 is located on the inner wall of the connecting groove 7. As shown in the figure, the connecting groove 7 is approximately J-shaped. With the plug 11 positioned in the slot 12, the nut 4 can move vertically as the screw 3 rotates, thereby realizing the vertical movement of the lifting plate 6.

[0022] The elastic mechanism includes a spring 16 sleeved on the outside of the slide bar 15. The two ends of the spring 16 are connected to the inner wall of the movable groove 13 and the outer wall of the positioning frame 14, respectively. The elastic potential energy provided by the spring 16 is sufficient to compress the positioning frame 14, ensuring that part of the positioning frame 14 is in the positioning groove 10. At this time, the lifting plate 6 cannot move horizontally and disengage from the nut 4.

[0023] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail in this application.

[0024] When this utility model is in use, the drive motor 19 starts and drives the transmission shaft 18 to rotate. The transmission shaft 18, together with the first gear 20 and the second gear 21, drives the screw 3 to rotate. When the screw 3 rotates, the nut 4 is limited and can only move vertically. When the lifting plate 6 descends, the spring to be tested can be subjected to a tensile test through the two hooks 9, or a compression test through the two compression blocks 8. During the tensile test, the spring to be tested is above the lifting plate 6, and during the compression test, the spring to be tested is below the lifting plate 6.

[0025] In this design, the positioning frame 14 can be moved within the movable groove 13 and slide on the slide rod 15, while simultaneously compressing the spring 16. Consequently, the portion of the spring 16 within the positioning groove 10 disengages from the positioning groove 10, and the lifting plate 6 loses its limit, allowing it to move horizontally relative to components such as the nut 4, thus disengaging from them. This disassembly disperses the weight of the device, facilitating movement and transportation, and also making it easier to maintain or replace components such as the lifting plate 6. Furthermore, after the lifting plate 6 is disassembled, there is sufficient space for the inspection and maintenance of components such as the screw 3.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A multi-range microcomputer-controlled spring tension and compression testing machine, comprising a fixed frame (1), characterized in that, A control box (2) is installed on the fixed frame (1). A transmission groove (17) is provided at the bottom of the fixed frame (1). Two screws (3) extending into the transmission groove (17) are rotatably provided on the fixed frame (1). A transmission shaft (18) is rotatably provided in the transmission groove (17). The screws (3) are connected to the transmission shaft (18) through a transmission mechanism. A drive motor (19) is installed on the fixed frame (1). Nuts (4) are threaded on the screws (3) through a limiting mechanism. Lifting plates (6) are installed on the two nuts (4) through an insertion mechanism. Extrusion blocks (8) and hooks (9) are installed on both the fixed frame (1) and the lifting plate (6). A movable groove (13) is provided on the lifting plate (6). A sliding rod (15) is provided in the movable groove (13). A positioning frame (14) is slidably sleeved on the sliding rod (15) through an elastic mechanism. A positioning groove (10) is provided on the fixed frame (1).

2. The multi-range microcomputer-controlled spring tension and compression testing machine according to claim 1, characterized in that, The transmission mechanism includes a first gear (20) fixedly mounted on a transmission shaft (18), and a second gear (22) meshing with the first gear (20) is mounted on the screw (3).

3. The multi-range microcomputer-controlled spring tension and compression testing machine according to claim 2, characterized in that, The limiting mechanism includes a limiting rod (5) fixedly installed on the fixed frame (1), and the limiting rod (5) slides through the nut (4).

4. The multi-range microcomputer-controlled spring tension and compression testing machine according to claim 3, characterized in that, The insertion mechanism includes a plug (11) fixedly installed on a nut (4), and the lifting plate (6) is provided with a slot (12) corresponding to the plug (11).

5. The multi-range microcomputer-controlled spring tension and compression testing machine according to claim 4, characterized in that, The elastic mechanism includes a spring (16) sleeved on the outside of the slide bar (15), with the two ends of the spring (16) connected to the inner wall of the movable groove (13) and the outer wall of the positioning frame (14), respectively.

6. The multi-range microcomputer-controlled spring tension and compression testing machine according to claim 5, characterized in that, Both the first gear (20) and the second gear (22) are bevel gears. The lifting plate (6) is provided with a connecting groove (7), and the slot (12) is provided on the inner wall of the connecting groove (7).

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