Vibration testing device for simulating connection strength of ceiling fan blade arm

Abstract

A vibration testing device for simulating connection strength of a ceiling fan blade arm, relating to the technical field of fan testing, and comprising a base (1). A workbench (2) used for mounting a blade arm for connection strength testing is provided above the base (1); a driving mechanism (4) used for driving the workbench (2) to reciprocate up and down is provided on the base (1); the driving mechanism (4) comprises a rotating shaft (41) connected to the base (1) and an eccentric portion (42) arranged on the rotating shaft (41) and used for matching the bottom of the workbench; and the driving mechanism (4) further comprises a driving assembly (43) for driving the rotating shaft (41) to rotate so that the eccentric portion (42) acts on the bottom of the workbench (2) to drive the workbench (2) to reciprocate up and down. In the device, the driving mechanism (4) drives the eccentric portion (42) to rotate to match the bottom of the workbench (2), so that the workbench (2) reciprocates up and down. During testing, the eccentric portion (42) is in full contact with a driven assembly (5), and the workbench (2) keeps stable vibration, so as to obtain a more accurate test result, thereby solving the problem of unstable operation of existing vibration testing devices.

Description

A vibration testing device for simulating the connection strength of ceiling fan blades and hairpins [Technical Field]

[0001] This utility model relates to the field of fan testing technology, specifically to a vibration testing device for simulating the connection strength of ceiling fan blades. [Background Technology]

[0002] Currently, in the field of fan testing, technicians need to conduct strength tests on the blades during the research and development testing process. If undesirable phenomena such as breakage occur before the required number of vibration tests are met, technicians need to adjust their direction in a timely manner and formulate further research and development plans.

[0003] In the existing Chinese utility model patent CN212030869U, a crack-resistant vibration testing device for fan blade assembly is disclosed. The testing device uses a motor to drive an eccentric wheel, which is connected to a fixed frame via a connecting piece, thereby driving the lifting rod to move up and down and generating vibration.

[0004] However, due to the weak stress point of the connecting piece, the connecting piece is easily deformed during repeated vibrations due to the transmission and cooperation between the connecting piece, the fixed frame, and the lifting rod. This can lead to problems with the substrate not moving up and down properly, which in turn causes the fan blades to fail to meet the test standards and affects the final test results.

[0005] In view of the above-mentioned technical problems, this utility model is proposed in this study.

[0006] [Utility Model Content]

[0007] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a vibration testing device for simulating the connection strength of ceiling fan blades. A drive mechanism drives an eccentric part to rotate and engage with the bottom of the worktable, causing the worktable to reciprocate up and down. During the test, the eccentric part and the driven component are in full contact, thus maintaining stable vibration and solving the problem of unstable operation in existing vibration testing devices. The vibration testing device of this application has the advantages of stable operation and more accurate test results.

[0008] This utility model is achieved through the following technical solution:

[0009] A vibration testing device for simulating the connection strength of ceiling fan blades includes a base 1. A worktable 2 for mounting blades to perform connection strength testing is provided on the base 1. A drive mechanism 4 for driving the worktable 2 to reciprocate up and down is provided on the base 1. The drive mechanism 4 includes a rotating shaft 41 connected to the base 1 and an eccentric part 42 provided on the rotating shaft 41 for engaging with the bottom of the worktable 2. The drive mechanism 4 also includes a drive assembly 43 for driving the rotating shaft 41 to rotate so that the eccentric part 42 acts on the bottom of the worktable 2, thereby causing the worktable 2 to reciprocate up and down.

[0010] As described above, in a vibration testing device for simulating the connection strength of ceiling fan blades, the bottom of the worktable 2 is provided with a driven component 5 for cooperating with the eccentric part 42 to drive the worktable 2 to reciprocate up and down.

[0011] As described above, in a vibration testing device for simulating the connection strength of ceiling fan blades, the driven component 5 includes a fixed base 51 located at the bottom of the workbench 2, and a guide wheel 52 located in the fixed base 51 for engaging with the eccentric part 42.

[0012] As described above, in a vibration testing device for simulating the connection strength of ceiling fan blades, the guide wheel 52 is rotatably engaged with the fixed base 51.

[0013] As described above, in a vibration testing device for simulating the connection strength of ceiling fan blades, the drive mechanism 4 further includes a pair of bases 433 spaced apart on the base 1. The two ends of the rotating shaft 41 are rotatably engaged with the corresponding bases 433. The drive assembly 43 is mounted on the base 1 to drive the rotating shaft 41 to rotate.

[0014] As described above, in a vibration testing device for simulating the connection strength of ceiling fan blades, the rotating shaft 41 is detachably connected to the eccentric part 42. The rotating shaft 41 includes a first end 411 and a second end 412. At least one guide groove 414 is provided on the rotating shaft 41. The middle part of the guide groove 414 extends toward the first end 411 of the rotating shaft 41, forming an inlet 413 at the first end 411. The second end 412 of the rotating shaft 41 extends and bends in the guide groove 414 to form a positioning groove 415.

[0015] The eccentric part 42 is provided with a through hole 421 that slides with the rotating shaft 41. At least one protrusion 422 is provided inside the through hole 421 of the eccentric part 42. The protrusion 422 enters the guide groove 414 through the inlet 413 and slides into the positioning groove 415. The protrusion 422 is engaged in the positioning groove 415 to restrict the movement of the eccentric part 42. A limiting member 55 is provided between the eccentric part 42 and the rotating shaft 41 to lock the eccentric part 42 in the positioning groove 415.

[0016] As described above, a vibration testing device for simulating the connection strength of ceiling fan blades includes a limiting component 55 comprising a fixing part 56b formed on the second end 412 of the rotating shaft 41 and a compression spring 57 sleeved on the rotating shaft 41. The compression spring 57 is located between the fixing part 56b and the eccentric part 42 and is used to press the eccentric part 42 to prevent the protrusion 422 from disengaging from the positioning groove 415.

[0017] As described above, a vibration testing device for simulating the connection strength of ceiling fan blades is provided between the workbench 2 and the base 1, which is an elastic component 6 for keeping the driven component 5 and the eccentric part 42 in contact during up-and-down movement.

[0018] As described above, a vibration testing device for simulating the connection strength of ceiling fan blades includes a drive assembly 43 comprising a motor 431 mounted on a base 1, a drive wheel 434a mounted on the output shaft 432 of the motor 431, and a driven wheel 435a mounted on a rotating shaft 41. It also includes a transmission belt 436a wound between the drive wheel 434a and the driven wheel 435a.

[0019] As described above, a vibration testing device for simulating the connection strength of ceiling fan blades is provided above the workbench 2, which is equipped with a fixture 201 for installing different types of blades to meet different testing requirements. The fixture 201 is provided with several sets of holes 203 of the same specifications for installing blades.

[0020] Compared with existing technologies, the vibration testing device for simulating the connection strength of ceiling fan blades and hairpins of this invention has the following advantages:

[0021] 1. In this embodiment, when the vibration testing device is used for testing, the fan blades are installed on the worktable. After installation, the drive mechanism drives the rotating shaft to rotate, and the rotating shaft then drives the eccentric part to rotate. The eccentric part directly acts on the bottom of the worktable, thereby causing the worktable to reciprocate up and down. Compared with the traditional vibration testing machine that drives the connecting plate through the eccentric wheel, and then drives the base to move up and down through the connecting plate, this method has the advantages of smooth operation and higher vibration amplitude accuracy. At the same time, it reduces friction loss, improves energy efficiency, and reduces energy consumption.

[0022] 2. In vibration testing, the guide wheel and the eccentric part make rolling contact. To avoid prolonged contact with the same position on the guide wheel, this design uses a rotating mechanism between the guide wheel and its shaft. This prevents long-term wear on the same spot and extends the guide wheel's service life. It also prevents severe wear on the guide wheel at the same location, which could lead to insufficient travel on the worktable, ensuring vibration accuracy remains within a stable and controllable range.

[0023] 3. This utility model achieves a detachable connection between the rotating shaft and the eccentric part, facilitating installation and disassembly, and simplifying maintenance and replacement of the eccentric part. This reduces downtime and additional costs associated with maintenance, while ensuring structural stability and reliability. The technical solution of this application is applicable to the testing requirements of different types of blades and is versatile. Different blade testing requirements have different vibration amplitudes, which can be selected by changing the type of eccentric part. [Attached Image Description]

[0024] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0025] Figure 1 is one of the structural schematic diagrams of the vibration testing device in this utility model;

[0026] Figure 2 is a second structural schematic diagram of the vibration testing device in this utility model;

[0027] Figure 3 is a schematic diagram of the vibration testing device in this utility model.

[0028] Figure 4 is one of the partial schematic diagrams of the drive mechanism in this utility model;

[0029] Figure 5 is a second partial schematic diagram of the drive mechanism in this utility model;

[0030] Figure 6 is a partial exploded view of the driven component in this utility model;

[0031] Figure 7 is a partial schematic diagram of the driven component in this utility model;

[0032] Figure 8 is one of the structural schematic diagrams of the eccentric part and the rotating shaft in this utility model;

[0033] Figure 9 is one of the assembly diagrams of an embodiment of the eccentric part and the rotating shaft in this utility model;

[0034] Figure 10 is a second schematic diagram of the structure between the eccentric part and the rotating shaft in this utility model;

[0035] Figure 11 is a second assembly diagram of an embodiment of the assembly of the eccentric part and the rotating shaft in this utility model;

[0036] Figure 12 is one of the structural schematic diagrams of the eccentric part in this utility model;

[0037] Figure 13 is a second structural schematic diagram of the eccentric part in this utility model;

[0038] Figure 14 is one of the structural schematic diagrams of the drive component in this utility model;

[0039] Figure 15 is a second schematic diagram of the drive assembly in this utility model;

[0040] Figure 16 is a schematic diagram of the fixture in this utility model;

[0041] Figure 17 is a partial schematic diagram of the base of this utility model.

[0042] In the diagram: 1. Machine base; 11. Motor mounting base; 12. Strip hole; 13. Fixing plate; 14. Screw; 15. Left adjusting nut; 16. Right adjusting nut; 2. Worktable; 201. Fixture; 202. Clearance hole; 203. Hole position; 3. Guide rod; 31. Opening; 4. Drive mechanism; 41. Rotating shaft; 411. First end; 412. Second end; 413. Inlet; 414. Guide groove; 415. Positioning groove; 42. Eccentric part; 421. Through hole; 422. Protrusion; 43. Drive assembly; 431. Motor; 432. Output shaft; 433. Base; 434a. Drive wheel; 435a. Driven wheel; 436a. Transmission belt; 434b. Drive sprocket; 435b. Driven sprocket; 436b. Chain; 5. Driven component; 51. Fixed seat; 52. Guide wheel; 53. Bearing; 54. Guide wheel shaft; 55. Limiting component; 56a. Threaded sleeve; 56b. Fixed part; 57. Compression spring; 58. Washer; 6. Elastic component; 61. Spring; 611. Tension spring; 62. Connecting seat; 63. Connecting piece.

Detailed Implementation Methods

[0043] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0044] As shown in Figure 1-17, this utility model includes a vibration testing device for simulating the connection strength of ceiling fan blades, comprising a base 1. The base 1 is characterized by a worktable 2 for mounting blades to perform connection strength testing. The base 1 is equipped with a drive mechanism 4 for driving the worktable 2 to reciprocate up and down. The drive mechanism 4 includes a rotating shaft 41 connected to the base 1 and an eccentric portion 42 on the rotating shaft 41 for engaging with the bottom of the worktable 2. The drive mechanism 4 also includes a drive assembly 43 for driving the rotating shaft 41 to rotate so that the eccentric portion 42 acts on the bottom of the worktable 2, thereby causing the worktable 2 to reciprocate up and down. The base 1 is provided with several guide rods 3 that slide vertically with the worktable 2. The worktable 2 has openings 31 that slide with the guide rods 3. The upper end of each guide rod 3 is fitted into the opening 31 of the worktable 2 and slides with it.

[0045] In this embodiment, when the vibration testing device is performing a test, the fan blades are installed on the workbench 2. After installation, the drive mechanism 4 drives the rotating shaft 41 to rotate, and the rotating shaft 41 then drives the eccentric part 42 to rotate. The eccentric part 42 directly acts on the bottom of the workbench 2, thereby causing the workbench 2 to move up and down. Compared with the traditional vibration testing machine that drives the connecting plate through the eccentric wheel, and then drives the base to move up and down through the connecting plate, this method has the advantages of smooth operation and higher vibration amplitude accuracy. At the same time, it reduces friction loss, improves energy efficiency, and thus reduces energy consumption.

[0046] Furthermore, this application utilizes multiple guide rods 3 mounted on the base 1 to slide against the worktable 2, thereby enhancing the stability of the worktable 2 during vertical movement. Besides the guide rods 3, this application can also employ a guide rail and slider mechanism. For example, a support plate can be mounted on the base 1, with guide rails vertically installed on the support plate, and then connected to the worktable 2 via a slider. It should be noted that the guide rail and slider mechanism for the worktable 2 is not illustrated in this application and is existing technology.

[0047] As shown in Figures 4-7, as a further embodiment, to make the up-and-down movement of the worktable 2 more stable and to prevent the worktable 2 from being damaged and inconvenient to replace after long-term rolling contact between the bottom of the worktable 2 and the eccentric part 42, the bottom of the worktable 2 is provided with a driven component 5 for cooperating with the eccentric part 42 to drive the worktable 2 to reciprocate up and down. The driven component 5 includes a fixed base 51 provided at the bottom of the worktable 2, and a guide wheel 52 provided in the fixed base 51 for cooperating with the eccentric part 42; that is, the eccentric part 42 transmits power through the guide wheel 52 to act on the bottom of the worktable 2. Compared with the point contact method of connecting the connecting piece and the fixed frame in the prior art, the line contact between the eccentric part 42 and the guide wheel 52 has the advantage of smooth operation.

[0048] As shown in Figures 4-7, as a further embodiment, the guide wheel 52 is rotatably engaged with the fixed base 51; the driven component 5 includes a guide wheel shaft 54 ​​disposed on the fixed base 51, and the guide wheel 52 is disposed on the guide wheel shaft 54 ​​and rotatably engaged with the guide wheel shaft 54 ​​via a bearing 53. During vibration testing, the guide wheel 52 rolls into contact with the eccentric portion 42. To avoid prolonged contact with the same position of the guide wheel 52, this embodiment uses a rotatable engagement between the guide wheel 52 and the guide wheel shaft 54, preventing long-term wear on the same position of the guide wheel 52 and extending its service life. It also prevents the guide wheel 52 from experiencing severe wear at the same position, which could lead to insufficient vertical travel of the worktable 2, thus ensuring that vibration accuracy remains within a stable and controllable range. Furthermore, the guide wheel 52 is made of low-cost nylon material, thereby reducing production costs.

[0049] As shown in Figures 4 and 5, as a further embodiment, the drive mechanism 4 further includes a pair of bases 433 spaced apart on the base 1. The two ends of the rotating shaft 41 are rotatably engaged with the corresponding bases 433. The drive assembly 43 is mounted on the base 1 to drive the rotating shaft 41 to rotate. Bearings 53 are fitted at both ends of the rotating shaft 41 and connected to the corresponding bases 433. This design, through the rotational method of the bases 433 engaging with the rotating shaft 41, reduces friction between the rotating shaft 41 and the bases 433, making the rotation smoother.

[0050] As shown in Figures 8-11, as a further embodiment, the rotating shaft 41 is detachably connected to the eccentric part 42. The rotating shaft 41 includes a first end 411 and a second end 412. At least one guide groove 414 is provided on the rotating shaft 41. The middle part of the guide groove 414 extends toward the first end 411 of the rotating shaft 41, forming an inlet 413 at the first end 411. The second end 412 of the rotating shaft 41 extends and bends in the guide groove 414 to form a positioning groove 415.

[0051] The eccentric part 42 is provided with a through hole 421 that slides with the rotating shaft 41. At least one protrusion 422 is provided inside the through hole 421 of the eccentric part 42. The protrusion 422 enters the guide groove 414 through the inlet 413 and slides into the positioning groove 415. The protrusion 422 is engaged in the positioning groove 415 to restrict the movement of the eccentric part 42. A limiting member 55 is provided between the eccentric part 42 and the rotating shaft 41 to lock the eccentric part 42 in the positioning groove 415.

[0052] When assembling the eccentric part 42 and the rotating shaft 41, the eccentric part 42 is inserted into the rotating shaft 41 from the first end 411 to the second end 412. The through hole 421 of the eccentric part 42 is slidably engaged with the rotating shaft 41. At this time, the protrusion 422 on the inner side of the through hole 421 of the eccentric part 42 is aligned with the inlet 413 of the guide groove 414. By applying force to the eccentric part 42, the protrusion 422 slides into the guide groove 414 along the inlet 413. When the eccentric part 42 slides to the bend, it is rotated at a certain angle in the direction of the bend and then slid into the positioning groove 415.

[0053] At this time, the protrusion 422 of the eccentric part 42 engages with the positioning groove 415, and the eccentric part 42 is locked in the positioning groove 415 by the limiting component 55, so as to ensure that the eccentric part 42 and the rotating shaft 41 do not move relative to each other, thereby making the eccentric part 42 and the rotating shaft 41 work stably.

[0054] When disassembling the eccentric part 42, the locking of the eccentric part 42 is first released by the limiting component 55. At this time, the eccentric part 42 is in a state where it can move in the positioning groove 415. Rotating the eccentric part 42 causes the protrusion 422 to bend out of the corresponding bend, thereby disengaging the protrusion 422 from the positioning groove 415 and then sliding into the guide groove 414. Subsequently, the eccentric part 42 continues to slide towards the first end 411 of the rotating shaft 41, and the protrusion 422 slides out along the guide groove 414 at the inlet 413, so that the eccentric part 42 is separated from the rotating shaft 41.

[0055] This solution enables a detachable connection between the rotating shaft 41 and the eccentric part 42, facilitating installation and disassembly, and simplifying maintenance and replacement of the eccentric part 42. This reduces downtime and additional costs associated with maintenance while ensuring structural stability and reliability. Furthermore, the technical solution of this application is applicable to different types of blade testing environments, demonstrating versatility. Since different blade tests require different vibration amplitudes, the vibration amplitude can be selected by replacing the eccentric part 42 with different models.

[0056] As shown in Figures 8 and 9, in a preferred embodiment of the limiting component 55, the limiting component 55 includes a fixing part 56b formed on the second end 412 of the rotating shaft 41 and a compression spring 57 sleeved on the rotating shaft 41. The compression spring 57 is located between the fixing part 56b and the eccentric part 42 to press the eccentric part 42 to prevent the protrusion 422 from leaving the positioning groove 415. A washer 58 is also provided between the eccentric part 42 and the compression spring 57 to increase the friction force and ensure the stability between the two.

[0057] In this embodiment, a fixing part 56b is provided on the rotating shaft 41, and the compression spring 57 moves from the first end 411 of the rotating shaft 41 to the position of the fixing part 56b. When assembling the eccentric part 42 and the rotating shaft 41, the eccentric part 42 rotates the rotating shaft 41 from the inlet 413 of the first end 411 of the rotating shaft 41. The protrusion 422 slides on the rotating shaft 41 toward the bend of the guide groove 414. One side of the eccentric part 42 presses against the washer 58 to stop the compression spring 57 from sliding. It continues to slide so that the compression spring 57 is in a compressed state. Then, the eccentric part 42 is rotated at a certain angle so that the protrusion 422 is engaged in the positioning groove 415. At this time, the compression spring 57 and the washer 58 cooperate to press against the eccentric part 42 to restrict the movement of the eccentric part 42, thus completing the assembly.

[0058] When disassembling the eccentric part 42, force is applied to the eccentric part 42, pushing the compression spring 57 towards the fixing part 56b. The eccentric part 42 is in a movable state in the positioning groove 415. Rotating the eccentric part 42 causes the protrusion 422 to bend accordingly, thereby disengaging the protrusion 422 from the positioning groove 415 and sliding into the guide groove 414. Then, the eccentric part 42 continues to slide towards the first end 411 of the rotating shaft 41, and the protrusion 422 slides out along the guide groove 414 at the inlet 413, thus separating the eccentric part 42 from the rotating shaft 41. This embodiment uses a detachable method with the compression spring 57 and a stop to stop the movement between the eccentric part 42 and the rotating shaft 41, making the operation convenient and quick.

[0059] As shown in Figures 10 and 11, as another preferred embodiment of the limiting component 55, the limiting component 55 includes a threaded sleeve 56a disposed at the second end 412 of the rotating shaft 41. The threaded sleeve 56a is locked onto the rotating shaft 41 by a threaded engagement to abut against one side of the eccentric portion 42 to prevent the protrusion 422 from disengaging from the positioning groove 415. A washer 58 is also provided between the eccentric portion 42 and the threaded sleeve 56a to increase friction, ensuring tightness and stability between the two.

[0060] In this embodiment, a threaded sleeve 56a with a threaded stop is provided on the rotating shaft 41. When assembling the eccentric part 42, the threaded sleeve 56a is fitted onto the rotating shaft 41 from the first end 411. The threaded sleeve 56a is slid to engage and lock with the threaded portion of the rotating shaft 41. The eccentric part 42 is then assembled onto the rotating shaft 41. The eccentric part 42 is slid and rotated at a certain angle at the bend so that the protrusion 422 engages in the positioning groove 415. Then, the threaded sleeve 56a is rotated toward the eccentric part 42. A washer 58 is fitted between the threaded sleeve 56a and the eccentric part 42, pressing against one side of the eccentric part 42 to restrict its movement, thus completing the assembly. This embodiment uses a detachable threaded sleeve 56a with a stop to stop the movement between the eccentric part 42 and the rotating shaft 41, making the operation convenient and quick.

[0061] As shown in Figures 2 and 5, in a further embodiment, an elastic component 6 is provided between the worktable 2 and the base 1 to ensure that the driven component 5 and the eccentric part 42 remain in contact during vertical movement. Specifically, the elastic component 6 includes a spring 61, a connecting seat 62 disposed on the base 433 of the worktable 2, and a connecting member 63 disposed on the base 1. The upper end of the spring 61 is connected to the connecting seat 62, and the lower end is connected to the connecting member 63. To facilitate adjustment of the tension of the spring 61, the upper end of the spring 61 is threadedly connected to the connecting seat 62 on the base 433 of the worktable 2, and the lower end of the spring 61 is threadedly connected to the connecting member 63 on the base 1. When the worktable 2 is at its highest point during movement, the spring 61 is in a stretched state; during the vertical movement of the worktable 2, the action of the spring 61 ensures that the driven component 5 and the eccentric part 42 remain in contact, thereby ensuring stable operation of the vibration process.

[0062] As shown in Figure 5, in this application, the aforementioned spring 61 can replace the tension spring 611 that acts on the bottom of the worktable 2 to provide tension and pull the worktable 2 down to a specific position. The upper end of the tension spring 611 is connected to the worktable 2 via a connecting seat 62, and the lower end is locked to the machine base 1 via a connecting piece 63. When the worktable 2 moves upward, it pulls the tension spring 611, causing the tension spring 611 to undergo tensile deformation in the tensile direction. The number of elastic components 6 can be set to one or more; when multiple elastic components 6 are provided, the elastic components 6 work together during the fall of the worktable 2 to make the contact between the driven component 5 and the eccentric part 42 more stable, thereby ensuring that the vibration of the worktable 2 is stable and ultimately obtaining accurate test results.

[0063] As shown in Figure 14, in a preferred embodiment, the drive assembly 43 includes a motor 431 mounted on the base 1, a drive pulley 434a mounted on the output shaft 432 of the motor 431, and a driven pulley 435a mounted on the rotating shaft 41. It also includes a transmission belt 436a wound between the drive pulley 434a and the driven pulley 435a. This embodiment, through the transmission method of the drive pulley 434a, the driven pulley 435a, and the transmission belt 436a, has low maintenance costs and features smooth rotation and reduced abnormal noise during operation.

[0064] As shown in Figure 15, as another preferred embodiment, the drive assembly 43 includes a motor 431 mounted on the base 1, a drive sprocket 434b mounted on the output shaft 432 of the motor 431, and a driven sprocket 435b mounted on the rotating shaft 41. It also includes a chain 436b wound between the drive sprocket 434b and the driven sprocket 435b. This embodiment, through the transmission method of the drive sprocket 434b, the driven sprocket 435b, and the chain 436b, has a compact structure and high transmission accuracy during operation.

[0065] As another preferred embodiment, the drive assembly 43 includes a motor 431 mounted on the base 1, a drive gear mounted on the output shaft 432 of the motor 431, and a driven gear mounted on the rotating shaft 41 that meshes with the drive gear. This embodiment, through the meshing of the drive gear and the driven gear, features smooth transmission and high transmission efficiency. It should be noted that the engagement between the drive gear and the driven gear in the drive assembly 43 is not shown in the figures of this application.

[0066] As shown in Figure 16, as a further embodiment, in order to meet the testing requirements of different types of leaf hairpins, a fixture 201 for installing different types of leaf hairpins to meet different testing requirements is detachably provided on the upper part of the workbench 2. The fixture 201 has several sets of holes 203 of the same specification for installing leaf hairpins. Correspondingly, the fixture 201 is provided with clearance holes 202 for the guide rod 3 to pass through, to prevent the fixture 201 from being squeezed or collided during the testing process.

[0067] The vibration testing device in this application drives the worktable 2 to move up and down via the drive mechanism 4, thereby causing the fixture 201 to reciprocate up and down. This embodiment is equipped with fixtures 201 adapted to different models to perform vibration testing on different models of blades, eliminating the need for multiple models of vibration testing devices and reducing testing costs. The fixture 201 has several sets of holes 203 of the same specifications, which can supply multiple sets of blades for simultaneous testing, effectively improving testing efficiency.

[0068] For ease of disassembly, the connection between the fixture 201 and the worktable 2 can be achieved by means of snap-fit, pin, limit block, or fasteners for detachable connection of the fixture 201 and the worktable 2, including but not limited to the cooperation of the above connection methods.

[0069] As shown in Figure 17, as a further embodiment, a motor mounting base 1 is provided on the base 1, and a motor 431 is mounted on the motor mounting base 11. A strip hole 12 is provided on the motor mounting base 1. A fixing plate 13 is also provided on the base 1. A screw 14 is provided in the motor mounting base 11. One end of the screw 14 is connected to the fixing plate 13. A left adjusting nut 15 is provided at the left end of the screw 14, and a right adjusting nut 16 is provided at the right end of the screw 14. Adjust the left adjusting nut 15 to reduce the gap between the driving wheel 434a and the driven wheel 435a, or between the driving sprocket 434b and the driven sprocket 435b, so that the transmission belt 436a or chain 436b can be fitted between the driving wheel 434a and the driven wheel 435a, or between the driving sprocket 434b and the driven sprocket 435b. Then, adjust the right adjusting nut 16 and lock it with the fixing plate 13 to tension the transmission belt 436a or chain 436b. Finally, fix the screw with the strip hole 12 on the fixing plate 13 to complete the installation.

Claims

1. A vibration testing device for simulating the connection strength of ceiling fan blades, comprising a base (1), characterized in that... The base (1) is provided with a worktable (2) for installing the blade for connection strength testing. The base (1) is provided with a drive mechanism (4) for driving the worktable (2) to move up and down. The drive mechanism (4) includes a rotating shaft (41) connected to the base (1) and an eccentric part (42) provided on the rotating shaft (41) for cooperating with the bottom of the worktable (2). The drive mechanism (4) also includes a drive assembly (43) for driving the rotating shaft (41) to rotate so that the eccentric part (42) acts on the bottom of the worktable (2) so that the worktable (2) moves up and down.

2. The vibration testing device for simulating the connection strength of ceiling fan blades and hairpins according to claim 1, characterized in that... The bottom of the worktable (2) is provided with a driven component (5) for cooperating with the eccentric part (42) to drive the worktable (2) to move up and down reciprocally.

3. The vibration testing device for simulating the connection strength of ceiling fan blades and hairpins according to claim 2, characterized in that... The driven component (5) includes a fixed seat (51) located at the bottom of the worktable (2), and a guide wheel (52) located in the fixed seat (51) for engaging with the eccentric part (42).

4. The vibration testing device for simulating the connection strength of ceiling fan blades and hairpins according to claim 3, characterized in that... The guide wheel (52) is rotatably engaged with the fixed base (51).

5. The vibration testing device for simulating the connection strength of ceiling fan blades and hairpins according to claim 1, characterized in that... The drive mechanism (4) further includes a pair of bases (433) spaced apart on the base (1). The two ends of the rotating shaft (41) are rotatably engaged with the corresponding bases (433). The drive assembly (43) is mounted on the base (1) to drive the rotating shaft (41) to rotate.

6. The vibration testing device for simulating the connection strength of ceiling fan blades and hairpins according to claim 1, characterized in that... The rotating shaft (41) is detachably connected to the eccentric part (42). The rotating shaft (41) includes a first end (411) and a second end (412). At least one guide groove (414) is provided on the rotating shaft (41). The middle part of the guide groove (414) extends toward the first end (411) of the rotating shaft (41) and forms an inlet (413) at the first end (411). The second end (412) of the rotating shaft (41) extends and bends in the guide groove (414) to form a positioning groove (415). The eccentric part (42) is provided with a through hole (421) that slides with the rotating shaft (41). The inner side of the through hole (421) of the eccentric part (42) is provided with at least one protrusion (422). The protrusion (422) enters the guide groove (414) through the inlet (413) and slides into the positioning groove (415). The protrusion (422) is engaged in the positioning groove (415) to restrict the movement of the eccentric part (42). A limiting member (55) is provided between the eccentric part (42) and the rotating shaft (41) to lock the eccentric part (42) in the positioning groove (415).

7. The vibration testing device for simulating the connection strength of ceiling fan blades and hairpins according to claim 6, characterized in that... The limiting component (55) includes a fixing part (56b) formed on the second end (412) of the rotating shaft (41) and a compression spring (57) sleeved on the rotating shaft. The compression spring (57) is located between the fixing part (56b) and the eccentric part (42) to press the eccentric part (42) to restrict the protrusion (422) from disengaging from the positioning groove (415).

8. The vibration testing device for simulating the connection strength of ceiling fan blades and hairpins according to claim 2, characterized in that... An elastic component (6) is provided between the worktable (2) and the base (1) to keep the driven component (5) and the eccentric part (42) in contact during the up and down movement.

9. The vibration testing device for simulating the connection strength of ceiling fan blades and hairpins according to claim 1, characterized in that... The drive assembly (43) includes a motor (431) mounted on a base (1), a drive wheel (434a) mounted on the output shaft (432) of the motor (431), and a driven wheel (435a) mounted on a rotating shaft (41). It also includes a transmission belt (436a) wound between the drive wheel (434a) and the driven wheel (435a).

10. The vibration testing device for simulating the connection strength of ceiling fan blades according to any one of claims 1 to 9, characterized in that... The workbench (2) is detachably provided with a fixture (201) for installing different types of leaf hairpins to meet different test requirements. The fixture (201) has several sets of holes (203) of the same specification for installing leaf hairpins.

Images