Bending resistance testing device for multi-section transmission shaft

Abstract

The utility model provides an anti-bending testing device for a multi-section transmission shaft, belongs to the technical field of transmission shafts, and solves the problem that the transmission shaft is easy to deviate during an anti-bending test in the prior art. The bending resistance testing device for the multi-section transmission shaft comprises a base, a driving assembly is arranged on the base, two bidirectional lead screws are arranged on the driving assembly, a first limiting block is fixed to the base, the bidirectional lead screws are rotationally connected with the first limiting block, two mounting blocks are connected to the bidirectional lead screws in a threaded mode, and a fixing base is fixed to the base. A fixing base is arranged on the base, a bending assembly is arranged on the fixing base, a pressing block is arranged on the bending assembly, two cavities are formed in the base, elastic assemblies are arranged in the cavities, supporting blocks are arranged on the elastic assemblies, the supporting blocks are connected with the cavities in a sliding mode, clamping blocks are arranged on the supporting blocks, and one ends of the clamping blocks are connected with the supporting blocks through hinges. The transmission shaft bending test device has the advantage of preventing the transmission shaft from deviating during the bending test.

Description

Technical Field

[0001] This utility model belongs to the field of transmission shaft technology and relates to a bending resistance testing device, particularly a bending resistance testing device for multi-section transmission shafts. Background Technology

[0002] Bending resistance is an important indicator for evaluating manufactured objects in industrial production, especially for objects that rely on their strength in future use. Bending resistance testing is particularly important, such as steel used in the manufacture of houses and bridges. If the bending resistance of these materials is not up to standard, it means that they do not have sufficient strength, which poses a huge safety hazard for future construction.

[0003] Therefore, testing the bending resistance of objects is particularly important. In current industrial production, large-scale destructive testing equipment is often used to test objects in this regard. This method is time-consuming and labor-intensive, both in terms of equipment structure and cost. Moreover, the objects under test are useless after the test, which also causes losses.

[0004] A search revealed a Chinese patent document disclosing a device for testing the bending resistance of objects [Application No.: 201310441867.6; Publication No.: CN 103487300 A]. This device includes a base with two support columns, a U-shaped bracket, a transmission telescopic rod, a top block, a control module, and a power supply, an information output device, a stepper motor, and at least one distance sensor, all connected to the control module. The various modules are connected according to the technical solution designed in this invention to form the bending resistance testing device. The entire testing device has a simple structure, low manufacturing cost, and can effectively perform bending resistance tests on objects of various sizes and types. It also exhibits high testing sensitivity and significant results, possessing broad market and economic value.

[0005] The object bending resistance testing device disclosed in this patent can effectively perform bending resistance testing, and the test sensitivity is high and the effect is obvious. However, when the device is performing bending test, the drive shaft may bend and deviate from the placement column and fall. There is also the possibility that excessive pressure may cause the drive shaft to break. When it breaks, the fragments that fly out may cause injury to people. Utility Model Content

[0006] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a bending resistance testing device for multi-section drive shafts. The technical problem this invention aims to solve is: how to prevent the drive shaft from shifting during bending tests.

[0007] The objective of this utility model can be achieved through the following technical solutions:

[0008] A bending resistance testing device for a multi-section drive shaft includes a base, a drive assembly on the base, two bidirectional lead screws on the drive assembly, a limit block fixed on the base, the bidirectional lead screws being rotatably connected to the limit block, two mounting blocks threaded onto the bidirectional lead screws, a fixed seat fixed on the base, a bending assembly on the fixed seat, a pressure block on the bending assembly, two cavities inside the base, an elastic assembly inside the cavity, a support block on the elastic assembly, the support block being slidably connected to the cavity, a locking block on the support block, one end of the locking block being connected to the support block via a hinge, and the other end of the locking block being connected to the support block via a fixed assembly.

[0009] The working principle of this utility model is as follows: First, the drive assembly moves two mounting blocks to a position that matches the length of the drive shaft. Then, the drive shaft is placed on the two mounting blocks and the support block. The fixing assembly then fixes the locking block and the support block, thereby fixing the drive shaft. At this time, the bending assembly drives the pressure block to perform a bending resistance test on the drive shaft. While the bending assembly applies pressure, it is observed whether the drive shaft bends. At the same time as the bending assembly presses down on the drive shaft, the support block squeezes the elastic component, thereby limiting the drive shaft and preventing excessive pressure from causing the drive shaft to break. In the event of a breakage, the flying debris may cause injury to personnel.

[0010] The drive assembly includes a rotating rod that is rotatably connected to the base. A sprocket is fixed on the rotating rod, and a turntable is fixed at the other end of the rotating rod. A limit block is fixed on the base. A bidirectional lead screw is rotatably connected to the limit block. Sprockets are fixed on both bidirectional lead screws. Sprockets are connected to each other via chain drive.

[0011] Using the above structure, rotating the turntable drives the rotating rod to rotate, which in turn drives the first sprocket to rotate. Simultaneously, the first sprocket rotates, which in turn drives the two second sprockets to rotate synchronously via a chain. The rotation of the second sprockets in turn drives the bidirectional lead screw to rotate synchronously, thereby moving the two mounting blocks to the appropriate position and ensuring that the drive shaft does not shift during bending tests.

[0012] The elastic component includes a spring, which is fixedly connected to the cavity. The other end of the spring is fixedly connected to the support block. A slide rail is fixed to the inner wall of the cavity, and a slide rod is fixed to the support block. The slide rod is slidably connected to the slide rail.

[0013] With the above structure, when the support rod is pressed down, it will compress the spring. At the same time, the slide rod will slide in the slide. After the bending test of the drive shaft is completed, the fixed assembly is opened and the drive shaft is taken out. The spring rebounds, thereby driving the support block to reset.

[0014] The fixing component includes two fixing blocks, which are fixedly connected to the card block and the support block respectively. Both fixing blocks have threaded holes, and bolts are threaded into the threaded holes.

[0015] The above structure uses bolts to fix the two fixing blocks, thereby securing the drive shaft on the support block and preventing the drive shaft from breaking due to excessive pressure, which could cause injury to personnel.

[0016] Both the support block and the mounting block have arc-shaped grooves, which are located on the same horizontal line.

[0017] With the above structure, the arc-shaped grooves are located on the same horizontal line, which can limit the position of the drive shaft and prevent the position from shifting during testing.

[0018] The bending assembly includes an L-shaped bracket, which is fixedly connected to a fixed base. An electric telescopic rod is fixed on the L-shaped bracket. A mounting plate is fixed to the telescopic part of the electric telescopic rod. A pressure sensor is fixed on the mounting plate. The pressure sensor is fixedly connected to the pressure block.

[0019] Using the above structure, the mounting plate, pressure sensor, and pressure block are moved simultaneously by the extension and retraction of the electric telescopic rod, thereby moving the pressure block onto the drive shaft. Then, the electric telescopic rod continues to apply pressure, thereby conducting a bending resistance test on the drive shaft. When a certain pressure is applied and the drive shaft bends, the pressure value received by the pressure sensor is observed, thus testing the maximum pressure that the drive shaft can withstand.

[0020] The pressure block has an arc-shaped pressure groove.

[0021] With the above structure, the arc-shaped pressure groove can ensure that the pressure block will not slip when it is pressed.

[0022] Compared with existing technologies, this multi-section drive shaft bending resistance testing device has the following advantages:

[0023] 1. First, the drive assembly moves the two mounting blocks to a position matching the length of the drive shaft. Then, the drive shaft is placed on the two mounting blocks and the support block. The fixing assembly then secures the locking block and the support block, thus fixing the drive shaft. At this point, the bending assembly drives the pressure block to perform a bending resistance test on the drive shaft. While the bending assembly applies pressure, observe whether the drive shaft bends. As the bending assembly presses down on the drive shaft, the support block squeezes the elastic component, thus limiting the drive shaft and preventing excessive pressure from causing it to break. In the event of a breakage, the flying debris could potentially cause injury.

[0024] 2. By rotating the turntable, the turntable drives the rotating rod to rotate. As the rotating rod rotates, it drives the first sprocket to rotate. Simultaneously, the first sprocket rotates, and the chain drives the two second sprockets to rotate synchronously. Simultaneously, the second sprocket rotates, and the double-acting screw rotates synchronously, thereby moving the two mounting blocks to the appropriate position to ensure that the drive shaft does not shift during the bending test.

[0025] 3. When the support rod is pressed down, it will compress the spring. At the same time, the slide rod will slide in the slide. After the bending test of the drive shaft is completed, the fixed assembly is opened and the drive shaft is taken out. The spring rebounds, thereby driving the support block to reset. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model.

[0027] Figure 2 This is a side view of the present invention.

[0028] Figure 3 This is a schematic diagram of the structure of the pressure block in this utility model.

[0029] Figure 4 This is a schematic diagram of the support block in this utility model.

[0030] Figure 5 This is a cross-sectional view of the base in this utility model.

[0031] In the diagram: 1. Base; 2. Bidirectional lead screw; 3. Limiting block one; 4. Mounting block; 5. Fixed seat; 6. L-shaped bracket; 7. Electric telescopic rod; 8. Pressure block; 9. Rotating rod; 10. Sprocket one; 11. Turntable; 12. Limiting block two; 13. Sprocket two; 14. Support block; 15. Locking block; 16. Chain; 17. Hinge; 18. Spring; 19. Slide rail; 20. Slide rod; 21. Fixed block; 22. Bolt; 23. Pressure sensor; 24. Mounting plate. Detailed Implementation

[0032] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0033] like Figures 1-5As shown, this multi-section drive shaft bending resistance testing device includes a base 1, a drive assembly on the base 1, two bidirectional lead screws 2 on the drive assembly, a limit block 3 fixed on the base 1, the bidirectional lead screws 2 and the limit block 3 being rotatably connected, two mounting blocks 4 being threadedly connected to the bidirectional lead screws 2, a fixing seat 5 fixed on the base 1, a bending assembly on the fixing seat 5, a pressure block 8 on the bending assembly, two cavities opened inside the base 1, an elastic assembly inside the cavity, a support block 14 on the elastic assembly, the support block 14 being slidably connected to the cavity, a locking block 15 on the support block 14, one end of the locking block 15 being connected to the support block 14 via a hinge 17, and the other end of the locking block 15 being connected to the support block 14 via a fixing assembly.

[0034] First, the drive assembly moves the two mounting blocks 4 to a position matching the length of the drive shaft. Then, the drive shaft is placed on the two mounting blocks 4 and the support block 14. The fixing assembly then fixes the locking block 15 and the support block 14, thus securing the drive shaft. At this point, the bending assembly drives the pressure block 15 to perform a bending resistance test on the drive shaft. While the bending assembly applies pressure, the drive shaft is observed to see if it bends. As the bending assembly presses down on the drive shaft, the support block squeezes the elastic component, thus limiting the drive shaft and preventing excessive pressure from causing it to break. In the event of a breakage, the flying debris could potentially cause injury to personnel.

[0035] The drive assembly includes a rotating rod 9, which is rotatably connected to the base 1. A sprocket 10 is fixed on the rotating rod 9, and a turntable 11 is fixed at the other end of the rotating rod 9. A limit block 12 is fixed on the base 1. A bidirectional lead screw 2 is rotatably connected to the limit block 12. A sprocket 13 is fixed on each of the two bidirectional lead screws 2. The sprocket 10 and the sprocket 13 are connected by a chain 16.

[0036] By rotating the turntable 11, the turntable 11 drives the rotating rod 9 to rotate. As the rotating rod 9 rotates, it drives the first sprocket 10 to rotate. As the first sprocket 10 rotates, the chain 16 drives the two second sprockets 13 to rotate synchronously. As the second sprockets 13 rotate, they drive the bidirectional lead screw 2 to rotate synchronously, thereby moving the two mounting blocks 4 to the appropriate position to ensure that the drive shaft does not shift during the bending test.

[0037] The elastic component includes a spring 18, which is fixedly connected to the cavity. The other end of the spring 18 is fixedly connected to the support block 14. A slide rail 19 is fixed to the inner wall of the cavity. A slide rod 20 is fixed to the support block 14 and is slidably connected to the slide rail 19.

[0038] When the support rod 14 is pressed down, it will compress the spring 18. At the same time, the slide rod 20 will slide in the slide rail 19. After the bending test of the drive shaft is completed, the fixed assembly is opened and the drive shaft is taken out. The spring 18 rebounds, thereby driving the support block 14 to reset.

[0039] The fixing component includes two fixing blocks 21, which are fixedly connected to the locking block 15 and the support block 14 respectively. Each fixing block 21 has a threaded hole, and a bolt 22 is threaded into the threaded hole.

[0040] The two fixing blocks 21 are fixed by bolts 22, thereby fixing the drive shaft on the support block 14 and preventing the drive shaft from breaking due to excessive pressure, which could cause injury to personnel.

[0041] Both the support block 14 and the mounting block 4 have arc-shaped grooves, which are located on the same horizontal line.

[0042] The curved grooves, positioned on the same horizontal line, can limit the position of the drive shaft and prevent it from shifting during testing.

[0043] The bending assembly includes an L-shaped bracket 6, which is fixedly connected to a fixed base 5. An electric telescopic rod 7 is fixed on the L-shaped bracket 6. An installation plate 24 is fixed to the telescopic part of the electric telescopic rod 7. A pressure sensor 23 is fixed on the installation plate 24. The pressure sensor 23 is fixedly connected to the pressure block 8.

[0044] As the electric telescopic rod 7 extends and retracts, it moves the mounting plate 24, pressure sensor 23, and pressure block 8, thereby moving the pressure block 8 onto the drive shaft. Then, the electric telescopic rod 7 continues to apply pressure to perform a bending resistance test on the drive shaft. When a certain pressure is applied and the drive shaft bends, the pressure value received by the pressure sensor 23 is observed, thereby testing the maximum pressure that the drive shaft can withstand.

[0045] An arc-shaped pressure groove is provided on the pressure block 8.

[0046] The arc-shaped groove ensures that the pressure block 8 will not slip when pressed.

[0047] The working principle of this utility model is as follows: By rotating the turntable 11, the turntable 11 drives the rotating rod 9 to rotate. Simultaneously, the rotating rod 9 drives the first sprocket 10 to rotate. At the same time, the first sprocket 10 drives the two second sprockets 13 to rotate synchronously via the chain 16. Simultaneously, the second sprockets 13 drive the bidirectional lead screw 2 to rotate synchronously, thereby moving the two mounting blocks 4 to the appropriate positions. The drive shaft is then placed on the two mounting blocks 4 and the support block 14. At this point, the two fixing blocks 21 are fixed with bolts 22, thus fixing the drive shaft on the support block 14. After fixing is complete, the electric telescopic rod 7 extends and retracts, simultaneously driving the mounting plate 24 and the pressure sensor 2. 3 and pressure block 8 are moved to move pressure block 8 onto the drive shaft. Then, electric telescopic rod 7 continues to apply pressure to perform a bending resistance test on the drive shaft. When a certain pressure is applied and the drive shaft bends, the pressure value received by pressure sensor 23 is observed to test the maximum pressure that the drive shaft can withstand. While the pressure block is testing the drive shaft, the support rod 14 will be pressed down when the drive shaft bends. While the support rod 14 is pressed down, it will squeeze the spring 18. At the same time as squeezing, the slide rod 20 will slide in the slide rail 19. After the bending test of the drive shaft is completed, the fixing assembly is opened and the drive shaft is taken out. The spring 18 rebounds, thereby driving the support block 14 to reset.

[0048] In summary, the coordinated use of the drive component, bending component, elastic component, and fixing component ensures that the drive shaft will shift during bending tests.

[0049] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A bending resistance testing device for multi-section drive shafts, comprising a base (1), characterized in that, A drive assembly is provided on the base (1), and two bidirectional lead screws (2) are provided on the drive assembly. A limit block (3) is fixed on the base (1). The bidirectional lead screw (2) is rotatably connected to the limit block (3). Two mounting blocks (4) are threadedly connected to the bidirectional lead screw (2). A fixed seat (5) is fixed on the base (1). A bending assembly is provided on the fixed seat (5). A pressure block (8) is provided on the bending assembly. Two cavities are opened in the base (1). An elastic assembly is provided in the cavity. A support block (14) is provided on the elastic assembly. The support block (14) is slidably connected to the cavity. A locking block (15) is provided on the support block (14). One end of the locking block (15) is connected to the support block (14) through a hinge (17). The other end of the locking block (15) is connected to the support block (14) through a fixing assembly.

2. The bending resistance testing device for a multi-section drive shaft according to claim 1, characterized in that, The drive assembly includes a rotating rod (9), which is rotatably connected to the base (1). A sprocket (10) is fixed on the rotating rod (9), and a turntable (11) is fixed at the other end of the rotating rod (9). A limit block (12) is fixed on the base (1). A bidirectional lead screw (2) is rotatably connected to the limit block (12). A sprocket (13) is fixed on each of the two bidirectional lead screws (2). The sprocket (10) and the sprocket (13) are connected by a chain (16).

3. The bending resistance testing device for a multi-section drive shaft according to claim 1, characterized in that, The elastic component includes a spring (18), which is fixedly connected to the cavity. The other end of the spring (18) is fixedly connected to the support block (14). A slide rail (19) is fixed on the inner wall of the cavity. A slide rod (20) is fixed on the support block (14). The slide rod (20) is slidably connected to the slide rail (19).

4. The bending resistance testing device for a multi-section drive shaft according to claim 1, characterized in that, The fixing component includes two fixing blocks (21), which are fixedly connected to the card block (15) and the support block (14) respectively. Each of the two fixing blocks (21) has a threaded hole, and a bolt (22) is threaded into the threaded hole.

5. The bending resistance testing device for a multi-section drive shaft according to claim 1, characterized in that, Both the support block (14) and the mounting block (4) are provided with arc-shaped grooves, which are located on the same horizontal line.

6. The bending resistance testing device for a multi-section drive shaft according to claim 1, characterized in that, The bending assembly includes an L-shaped bracket (6), which is fixedly connected to the fixed seat (5). An electric telescopic rod (7) is fixed on the L-shaped bracket (6), and an installation plate (24) is fixed to the telescopic part of the electric telescopic rod (7). A pressure sensor (23) is fixed on the installation plate (24), and the pressure sensor (23) is fixedly connected to the pressure block (8).

7. The bending resistance testing device for a multi-section drive shaft according to claim 1, characterized in that, The pressure block (8) has an arc-shaped pressure groove.

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