Fatigue life test bench and test method for electric actuator

Abstract

The invention belongs to the technical field of electric actuator testing, and discloses a fatigue life test board of an electric actuator, a top plate can move up and down, connecting pieces can rotate, load pieces are a plurality of coaxially placed load discs and are provided with connecting holes, and the top plate moves to enable the connecting pieces to be inserted into the connecting holes of the load discs for testing. The method further comprises the following steps of placing the electric actuator between the clamping plates, fixing and connecting the electric actuator to the connecting pipe, rotating the actuator to drive the connecting pipe, enabling the side plates, the connecting rods and the load discs to rotate together, and carrying out fatigue testing. By adjusting the number of the connecting pieces inserted among the plurality of load discs, the load capacity during testing of the electric actuator is further adjusted, so that the device can test the electric actuator under the condition of different load capacities, adjustment can be performed according to the actual use condition, and the tested data are more representative.

Description

Technical Field

[0001] The invention belongs to the technical field of electric actuator testing, and in particular relates to a fatigue life test bench and a test method for an electric actuator. Background Art

[0002] With the development and progress of industry, the degree of industrial automation is increasing. Electric actuators are necessary instruments in industrial automation. Since a large number of identical actions need to be repeated in industrial activities, electric actuators need to be tested for fatigue life in order to ensure that they can work normally for a long time. Most existing testing methods connect the output end of the electric actuator to the load, and then use the electric actuator to drive the load to move repeatedly, and then perform fatigue life tests on the electric actuator.

[0003] However, when existing devices test electric actuators, their load amounts are mostly fixed. Therefore, when fatigue tests are performed on electric actuators, the fatigue life data generated can only be applied to the conditions under that load amount. The load cannot be adjusted according to actual usage conditions and can only be used in specific usage scenarios. The test data is not representative. Summary of the invention

[0004] The object of the present invention is to provide a fatigue life test bench and a test method for an electric actuator to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a fatigue life test bench for an electric actuator, comprising a top plate and a load member that move up and down relatively, and the top plate is located above the load member, a connecting member is rotatably connected to the top plate, and the top of the connecting member forms a connecting cavity connected to the output end of the electric actuator;

[0006] The load member includes a plurality of coaxially placed load plates, and each of the plurality of load plates is provided with a through-type connecting hole, and the connecting member is inserted between the plurality of connecting holes by moving the top plate.

[0007] Preferably, the fatigue life test bench of the electric actuator also includes a support member, the top of which is symmetrically fixedly connected to two first electric push rods, and the bottom of the support member is fixedly connected to a base, and the top plate is fixedly connected between the telescopic ends of the two first electric push rods.

[0008] Preferably, a limiting member is fixedly connected to the top of the support member, the limiting member is located between the two first electric push rods, and a placement cavity for placing a plurality of load plates is formed on the limiting member.

[0009] Preferably, the limiting member includes four limiting plates, the four limiting plates are fixedly connected to the top of the supporting member in an annular array, and the placement cavity is formed between the four limiting plates.

[0010] Preferably, the top of the limiting plate is recessed to form a first screw hole, and an adjustment plate is arranged above the limiting plate, the bottom of the adjustment plate is fixedly connected with a screw rod, and a second screw hole is formed on the top of the adjustment plate, and the screw rod matches the first screw hole and the second screw hole.

[0011] Preferably, the connecting member includes a rotating shaft, which is rotatably connected to the top plate, and the bottom of the rotating shaft is fixedly connected to a connecting rod, the top of the rotating shaft is fixedly connected to a connecting tube, the circumference of the connecting rod is symmetrically fixedly connected to two side plates, the connecting cavity is formed at the top of the connecting tube, and the connecting rod and the side plates match the connecting hole.

[0012] Preferably, two limit rods are symmetrically screwed together on the circumference of the connecting tube, and one end of the two limit rods extending to the outside of the connecting tube is fixedly connected to a handle.

[0013] Preferably, two limiting holes are symmetrically formed on the inner wall of the connecting hole, and a through-type mounting hole is symmetrically opened on the circumference of the connecting rod. The mounting hole is located between the two side plates, and two third electric push rods are symmetrically fixedly connected inside the mounting hole.

[0014] Preferably, two clamping members are symmetrically installed on the top of the top plate, and a clamping space for clamping the electric actuator is formed between the two clamping members;

[0015] The clamp member includes a support plate, a top frame is fixedly connected to the top of the support plate, a screw rod is screwed on the support plate, one end of the screw rod facing the electric actuator is fixedly connected to a clamping plate, and the other end is fixedly connected to a handle bar, and second electric push rods are fixedly connected to the two symmetrical sides of the top plate, and the telescopic end of the second electric push rod is fixedly connected to the bottom of the support plate.

[0016] A fatigue life testing method for an electric actuator comprises the following steps:

[0017] S1: Place the electric actuator to be tested between two clamping plates, rotate the handle and the screw rod to move the screw rod relative to the support plate, drive the clamping plate to move through the support plate, clamp the electric actuator through the two clamping plates, and connect the output end of the electric actuator to the connecting pipe;

[0018] S2: Rotate the handle and the limit rod to move the limit rod to the inside of the connecting tube, and the limit rod contacts the output end of the electric actuator inside the connecting tube. After the electric actuator is fixed, the top plate and the rotating shaft are driven to move together by the first electric push rod, so that the side plate and the connecting rod are inserted into the connecting holes on the load plate, so that multiple load plates are sleeved on the side plate and the connecting rod;

[0019] S3: The electric actuator is used to drive the connecting pipe to rotate, so that the connecting pipe, side plate, connecting rod and rotating shaft rotate relative to the top plate, thereby driving the load plate to rotate and perform fatigue life test.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) The present invention sets a plurality of load disks, and connects the output end of the electric actuator through a connector, and inserts the other end between the plurality of load disks. By adjusting the number of the connectors inserted between the plurality of load disks, the load amount during the test of the electric actuator is adjusted, so that the device can test the electric actuator under different load amounts, can be adjusted according to actual usage conditions, can be used in different usage scenarios, and the test data is more representative.

[0022] (2) On the basis of the above beneficial effects, the present invention sets a limit plate to limit and block the load disc. When the connecting member drives the load disc to rotate, the limit plate limits the rotation range of the load disc, so that the load disc rotates more smoothly, thereby making the device more stable when testing the electric actuator.

[0023] (3) On the basis of the above beneficial effects, the present invention provides an adjustable number of adjustment plates, which are screwed together with the second screw hole by a screw rod, so that personnel can connect the required number of adjustment plates, and screwed together with the first screw hole by a screw rod, so that the adjusted number of adjustment plates can be connected to the limit plate, thereby increasing the number of load plates placed between the multiple limit plates, further increasing the adjustment range of the number of load plates, and further increasing the scope of use of the device.

[0024] (4) On the basis of the above beneficial effects, when the side plate and the connecting rod are inserted into the limiting holes on the load disk, the third electric push rod on the connecting rod is extended and retracted, so that the telescopic end of the third electric push rod is inserted into the limiting hole inside the connecting hole, so that the connecting rod drives the load disk to rotate more stably, further improving the stability of the device when testing the electric actuator.

[0025] (5) On the basis of the above beneficial effects, the present invention arranges a second electric push rod to drive the support plate and the top frame to move, and rotates the screw rod to drive the clamping plate to resist the electric actuator, so that the device can be convenient for fixing electric actuators of different specifications and can be suitable for different electric actuators, thereby increasing the scope of use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A perspective view of the present invention;

[0027] Figure 2 One of the three-dimensional views of the present invention with the adjustment plate removed;

[0028] Figure 3 The second stereoscopic view of the present invention with the adjustment plate removed;

[0029] Figure 4 The third stereoscopic view of the present invention with the adjustment plate removed;

[0030] Figure 5 It is a three-dimensional diagram of the support member and the limit member of the present invention when they are connected;

[0031] Figure 6 is a three-dimensional diagram of a load-bearing member of the present invention;

[0032] Figure 7 is a three-dimensional diagram of the clamp of the present invention;

[0033] Figure 8 is a three-dimensional diagram of the connecting member of the present invention;

[0034] Fig. 9 is a three-dimensional diagram of a load tray of the present invention;

[0035] Fig.10 is a cross-sectional view of a load plate of the present invention;

[0036] Fig.11 for Figure 5 Enlarged view of part A in the middle;

[0037] Fig.12 for Figure 8 Enlarged view of middle part B;

[0038] Fig.13 for Figure 8 Enlarged view of the middle C part;

[0039] Fig.14 for Figure 5 Enlarged view of part A in the middle;

[0040] In the figure: 1. support member; 2. first electric push rod; 3. clamp member; 31. second electric push rod; 32. support plate; 33. top frame; 34. screw rod; 35. clamp plate; 36. handle; 4. top plate; 5. connecting member; 51. side plate; 52. connecting rod; 53. rotating shaft; 54. handle; 55. limiting rod; 56. connecting pipe; 57. third electric push rod; 58. mounting hole; 6. limiting member; 61. limiting plate; 62. adjusting plate; 63. first screw hole; 64. screw rod; 65. second screw hole; 7. base; 8. load member; 81. connecting hole; 82. load plate; 83. limiting hole. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figure 1-Figure 14 As shown, the present invention provides the following technical solutions:

[0043] A fatigue life test bench for an electric actuator. In order to test the electric actuator, the test bench comprises a top plate 4. In order to connect the electric actuator, a connecting piece 5 is rotatably connected to the top plate 4. The top of the connecting piece 5 forms a connecting cavity connected to the output end of the electric actuator.

[0044] In addition, in the present invention, when testing the electric actuator, in order to allow the load of the electric actuator test to be adjustable, the life test bench further includes a load member 8, the top plate 4 can move up and down relative to the load member 8, and the top plate 4 is located above the load member 8;

[0045] In addition, regarding how the load member 8 works, the load member 8 includes a plurality of coaxially placed load plates 82 , and each of the plurality of load plates 82 is provided with a through-type connecting hole 81 , and the connecting member 5 is inserted between the plurality of connecting holes 81 by moving the top plate 4 .

[0046] Through the above technical solution, when personnel need to test the electric actuator, the electric actuator to be tested is placed above the top plate 4. After the electric actuator is placed, the output end of the electric actuator is connected to the connecting cavity at the top of the connector 5. After the output end of the electric actuator is connected to the connector 5, the top plate 4 is moved relative to the load member 8, and then the top plate 4 drives the connector 5 to move together, so that the bottom of the connector 5 is inserted between multiple load disks 82. When personnel need to increase the load of the electric actuator, the downward movement distance of the connector 5 is adjusted so that the connector 5 is inserted between more load disks 82, thereby increasing the load of the electric actuator. When personnel need to reduce the load of the electric actuator, the downward movement distance of the connector 5 is adjusted so that the connector 5 is inserted between at least a certain number of load disks 82, thereby reducing the load of the electric actuator. After the load of the electric actuator is adjusted, the electric actuator is operated, and then the electric actuator drives the connector 5 to rotate relative to the top plate 4, and then the connector 5 drives the load disk 82 to rotate, so that the electric actuator is subjected to fatigue life testing, thereby knowing the service life of the electric actuator under different load conditions.

[0047] In addition, in the present invention, when the life test bench is working, in order to make the electric actuator more stable after testing, the life test bench also includes a support member 1, the top of the support member 1 is symmetrically fixedly connected with two first electric push rods 2, and the bottom of the support member 1 is fixedly connected with a base foot 7, and the top plate 4 is fixedly connected between the telescopic ends of the two first electric push rods 2.

[0048] Through the above technical solution, before the personnel need to test the electric actuator, the support member 1 is placed at the position where it needs to be used, and the support member 1 is supported by the bottom foot 7 so that the support member 1 is placed firmly, and the first electric push rod 2 is supported by the support member 1, and the electric actuator to be tested is placed above the top plate 4. After the electric actuator is placed, the output end of the electric actuator is connected to the connecting cavity at the top of the connecting member 5. After the output end of the electric actuator is connected to the connecting member 5, the first electric push rod 2 is operated, and then the first electric push rod 2 drives the top plate 4 to move downward, so that the top plate 4 drives the connecting member 5 to move together, and the bottom of the connecting member 5 is inserted between the multiple load disks 82. When When personnel need to increase the load of the electric actuator, they adjust the downward distance of the connecting member 5 so that the connecting member 5 is inserted between more load disks 82, thereby increasing the load of the electric actuator. When personnel need to reduce the load of the electric actuator, they adjust the downward distance of the connecting member 5 so that the connecting member 5 is inserted between at least a certain number of load disks 82, thereby reducing the load of the electric actuator. After the load of the electric actuator is adjusted, the electric actuator works to drive the connecting member 5 to rotate relative to the top plate 4, and then the connecting member 5 drives the load disk 82 to rotate, so that the electric actuator is subjected to fatigue life testing, thereby knowing the service life of the electric actuator under different load conditions.

[0049] When personnel test the electric actuator through the load plate 82, in order to make the load plate 82 rotate more smoothly, such as Figure 1-Figure 5 As shown, a limiting member 6 is fixedly connected to the top of the support member 1 , the limiting member 6 is located between the two first electric push rods 2 , and a placement cavity for placing a plurality of load plates 82 is formed on the limiting member 6 .

[0050] In this embodiment, after the connecting member 5 is inserted into the load disk 82, the connecting member 5 is driven to rotate by the electric actuator, and then the electric actuator drives the load disk 82 to rotate, so as to achieve the purpose of fatigue testing the electric actuator, and when the load disk 82 rotates, the limit member 6 is supported by the support member 1, and the rotation range of the load disk 82 is limited by the placement cavity on the limit member 6, so that the connecting member 5 drives the load disk 82 to rotate more smoothly, and the device is more stable when performing fatigue life testing on the electric actuator.

[0051] Specifically, in one embodiment, regarding how the above-mentioned limit member 6 guides the load plate 82 to rotate, as shown in FIG. Figure 1-Figure 5 As shown, the limiting member 6 includes four limiting plates 61 , which are fixedly connected to the top of the supporting member 1 in a circular array, and the placement cavity is formed between the four limiting plates 61 .

[0052] In this embodiment, before testing the electric actuator, a person needs to take the required number of load discs 82, and place the load discs 82 one by one between the four limit plates 61. The load discs 82 are limited by the four limit plates 61, so that the load discs 82 can be placed stably. After the load discs 82 are placed, the electric actuator to be tested is placed above the top plate 4. After the electric actuator is placed, the output end of the electric actuator is connected to the connecting cavity at the top of the connecting member 5. After the output end of the electric actuator is connected to the connecting member 5, the first electric push rod 2 is operated, and the first electric push rod 2 drives the top plate 4 to move downward, so that the top plate 4 drives the connecting member 5 to move together, so that the bottom of the connecting member 5 is inserted between the multiple load discs 82. The electric actuator is operated, and the electric actuator drives the connecting member 5 to rotate relative to the top plate 4, and the connecting member 5 drives the load disc 82 to rotate, so that the electric actuator is subjected to fatigue life test, thereby knowing the service life of the electric actuator under load.

[0053] In addition, in the present invention, when a person adjusts the number of load plates 82 between the four limit plates 61, in order to increase the number of load plates 82, as shown in FIG. Fig.11 As shown, the top of the limiting plate 61 is recessed to form a first screw hole 63, and an adjustment plate 62 is arranged above the limiting plate 61, the bottom of the adjustment plate 62 is fixedly connected with a screw rod 64, and a second screw hole 65 is formed at the top of the adjustment plate 62, and the screw rod 64 matches the first screw hole 63 and the second screw hole 65.

[0054] In this embodiment, before testing the electric actuator, take the required number of adjustment plates 62, screw the adjustment plates 62 with the second screw hole 65 on another adjustment plate 62 through the screw 64 to connect the two adjustment plates 62, and according to the above steps, connect the required number of adjustment plates 62. After the number of adjustment plates 62 is adjusted, screw the adjusted number of adjustment plates 62 with the first screw hole 63 on the limit plate 61 through the screw 64. According to the above steps, the adjusted number of adjustment plates 62 are connected to the other limit plates 61, thereby increasing the number of load disks 82 that can be placed on the device, thereby increasing the load adjustment range of the electric actuator, take the required number of load disks 82, place the load disks 82 one by one between the four limit plates 61, and use the four The limit plate 61 limits the load disk 82, so that the load disk 82 can be placed stably. After the load disk 82 is placed, the electric actuator to be tested is placed above the top plate 4. After the electric actuator is placed, the output end of the electric actuator is connected to the connecting cavity at the top of the connecting member 5. After the output end of the electric actuator is connected to the connecting member 5, the first electric push rod 2 is operated, and the first electric push rod 2 drives the top plate 4 to move downward, so that the top plate 4 drives the connecting member 5 to move together, so that the bottom of the connecting member 5 is inserted between the multiple load disks 82. The electric actuator is operated, and the electric actuator drives the connecting member 5 to rotate relative to the top plate 4, and the connecting member 5 drives the load disk 82 to rotate, so that the electric actuator is subjected to fatigue life testing, thereby knowing the service life of the electric actuator under different load conditions.

[0055] Specifically, in one embodiment, how the connecting member 5 connects the output end of the electric actuator and the load disk 82 is as follows: Figure 1-Figure 4 , Figure 8 As shown, the connecting member 5 includes a rotating shaft 53, which is rotatably connected to the top plate 4, and a connecting rod 52 is fixedly connected to the bottom of the rotating shaft 53, and a connecting tube 56 is fixedly connected to the top of the rotating shaft 53. The circumference of the connecting rod 52 is symmetrically fixedly connected to two side plates 51, and a connecting cavity is formed at the top of the connecting tube 56. The connecting rod 52 and the side plate 51 match the connecting hole 81.

[0056] In this embodiment, before testing the electric actuator, the personnel need to take the required number of load plates 82, and place the load plates 82 one by one between the four limit plates 61. The load plates 82 are limited by the four limit plates 61, so that the load plates 82 are placed stably. After the load plates 82 are placed, the electric actuator to be tested is placed above the top plate 4. After the electric actuator is placed, the output end of the electric actuator is connected to the connecting cavity at the top of the connecting pipe 56. After the output end of the electric actuator is connected to the connecting pipe 56, the first electric push rod 2 is connected to the connecting cavity 56. The first electric push rod 2 drives the top plate 4 to move downward, and the top plate 4 drives the connecting pipe 56, the connecting rod 52, the side plate 51 and the rotating shaft 53 to move together, so that the bottom of the connecting rod 52 and the side plate 51 are inserted into the connecting hole 81 between the multiple load disks 82, and the electric actuator works, so that the electric actuator drives the connecting rod 52 and the side plate 51 to rotate relative to the top plate 4, and then the connecting rod 52 and the side plate 51 drive the load disk 82 to rotate, so that the electric actuator is subjected to fatigue life test, so as to know the service life of the electric actuator under load state.

[0057] Furthermore, in the present invention, when a person connects the output end of the electric actuator through the connecting pipe 56, as shown in FIG. Fig.12 As shown, two limit rods 55 are symmetrically screwed together on the circumference of the connecting tube 56 , and one end of the two limit rods 55 extending to the outside of the connecting tube 56 is fixedly connected to a handle 54 .

[0058] In this embodiment, after the output end of the electric actuator is connected to the connecting cavity at the top of the connecting tube 56, the handle 54 is rotated, thereby driving the limit rod 55 to rotate, so that the limit rod 55 moves relative to the connecting tube 56, and then the limit rod 55 contacts the output end of the electric actuator in the connecting tube 56, so that the output end of the electric actuator is more tightly connected to the connecting tube 56.

[0059] When the connecting rod 52 and the side plate 51 are inserted into the load plate 82, in order to make the connecting rod 52 and the load plate 82 more tightly connected, as shown in FIG. Fig. 9 , Fig.10 , 13 and Fig.14 As shown, two limiting holes 83 are symmetrically formed on the inner wall of the connecting hole 81, and a through-type mounting hole 58 is symmetrically opened on the circumference of the connecting rod 52. The mounting hole 58 is located between the two side plates 51, and two third electric push rods 57 are symmetrically fixedly connected inside the mounting hole 58.

[0060] In the present embodiment, the first electric push rod 2 works, and then the first electric push rod 2 drives the top plate 4 to move downward, so that the top plate 4 drives the connecting pipe 56, the connecting rod 52, the side plate 51 and the rotating shaft 53 to move together, so that the bottom of the connecting rod 52 and the side plate 51 are inserted into the connecting hole 81 between the multiple load disks 82. When the connecting rod 52 and the side plate 51 stop moving, the third electric push rod 57 works, and then the telescopic end of the third electric push rod 57 is moved to the outside of the mounting hole 58 until the telescopic end of the third electric push rod 57 is inserted into the limiting hole 83 on the load disk 82 connected to the connecting rod 52 and the side plate 51 at the bottom, so that the connecting rod 52 and the side plate 51 are more tightly connected to the load disk 82. The electric actuator works, and then the electric actuator drives the connecting rod 52 and the side plate 51 to rotate relative to the top plate 4, and then the connecting rod 52 and the side plate 51 drive the load disk 82 to rotate, so that the electric actuator is subjected to fatigue life test, so as to know the service life of the electric actuator under load state.

[0061] In addition, in the present invention, when a person connects the electric actuator, in order to make the device more secure when connected to the electric actuator, such as Figure 1-Figure 4 , Figure 7 As shown, two clamping members 3 are symmetrically installed on the top of the top plate 4, and a clamping space for clamping the electric actuator is formed between the two clamping members 3;

[0062] The clamp member 3 includes a support plate 32, a top frame 33 is fixedly connected to the top of the support plate 32, a screw rod 34 is screwed on the support plate 32, one end of the screw rod 34 facing the electric actuator is fixedly connected to a clamping plate 35, and the other end is fixedly connected to a handle 36, and the second electric push rod 31 is fixedly connected to the symmetrical sides of the top plate 4, and the telescopic end of the second electric push rod 31 is fixedly connected to the bottom of the support plate 32.

[0063] In this embodiment, the electric actuator to be tested is placed above the top plate 4. After the electric actuator is placed, the output end of the electric actuator is connected to the connecting cavity at the top of the connecting member 5. After the output end of the electric actuator is connected to the connecting member 5, the second electric push rod 31 is operated, and the second electric push rod 31 drives the support plate 32 to move, so that the support plate 32 drives the top frame 33 to move to one side of the electric actuator, and the handle 36 and the screw rod 34 are rotated, so that the screw rod 34 moves relative to the top frame 33, and the clamping plate 35 is driven to move by the screw rod 34. The two clamping plates 35 resist the electric actuator, and then the electric actuator is fixed, and the first electric push rod 2 is operated, so that the first electric push rod 2 drives the top plate 4 to move downward, so that the top plate 4 drives the connecting member 5 to move together, and the bottom of the connecting member 5 is inserted between the multiple load disks 82. The electric actuator is operated, and the electric actuator drives the connecting member 5 to rotate relative to the top plate 4, and then the connecting member 5 drives the load disk 82 to rotate, so that the electric actuator is subjected to fatigue life test, so as to know the service life of the electric actuator under load state.

[0064] A fatigue life testing method for an electric actuator comprises the following steps:

[0065] S1: Place the electric actuator to be tested between the two clamping plates 35, rotate the handle 36 and the screw rod 34, so that the screw rod 34 moves relative to the support plate 32, and the clamping plate 35 is driven to move by the support plate 32, and the electric actuator is clamped by the two clamping plates 35, so that the output end of the electric actuator is connected to the connecting pipe 56;

[0066] S2: Rotate the handle 54 and the limit rod 55 to move the limit rod 55 to the inside of the connecting tube 56. The limit rod 55 contacts the output end of the electric actuator inside the connecting tube 56. After the electric actuator is fixed, the first electric push rod 2 drives the top plate 4 and the rotating shaft 53 to move together, so that the side plate 51 and the connecting rod 52 are inserted into the connecting hole 81 on the load plate 82, so that the multiple load plates 82 are sleeved on the side plate 51 and the connecting rod 52.

[0067] S3: The connecting pipe 56 is driven to rotate by the electric actuator, so that the connecting pipe 56, the side plate 51, the connecting rod 52 and the rotating shaft 53 rotate relative to the top plate 4, thereby driving the load plate 82 to rotate, and performing fatigue life test.

[0068] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fatigue life test bench for electric actuators, characterized in that: It comprises a top plate (4) and a load member (8) which move up and down relatively to each other, and the top plate (4) is located above the load member (8), a connecting member (5) is rotatably connected to the top plate (4), and the top of the connecting member (5) forms a connecting cavity connected to the output end of the electric actuator; The load member (8) comprises a plurality of coaxially placed load plates (82), and each of the plurality of load plates (82) is provided with a through-type connecting hole (81), and the connecting member (5) is inserted between the plurality of connecting holes (81) by moving the top plate (4).

2. The fatigue life test bench for electric actuator according to claim 1, characterized in that: It also comprises a support member (1), the top of which is symmetrically and fixedly connected to two first electric push rods (2), and the bottom of which is fixedly connected to a foot (7), and the top plate (4) is fixedly connected between the telescopic ends of the two first electric push rods (2).

3. The fatigue life test bench for electric actuator according to claim 2, characterized in that: The top of the support member (1) is fixedly connected to a limiting member (6), the limiting member (6) is located between the two first electric push rods (2), and a placement cavity for placing a plurality of load plates (82) is formed on the limiting member (6).

4. The fatigue life test bench for electric actuator according to claim 3, characterized in that: The limiting member (6) comprises four limiting plates (61), the four limiting plates (61) are fixedly connected to the top of the supporting member (1) in an annular array, and the placement cavity is formed between the four limiting plates (61).

5. The fatigue life test bench for electric actuator according to claim 4, characterized in that: The top of the limiting plate (61) is recessed to form a first screw hole (63), and an adjustment plate (62) is arranged above the limiting plate (61). The bottom of the adjustment plate (62) is fixedly connected with a screw rod (64), and a second screw hole (65) is formed at the top of the adjustment plate (62). The screw rod (64) matches the first screw hole (63) and the second screw hole (65).

6. The fatigue life test bench for electric actuator according to claim 1, characterized in that: The connecting member (5) comprises a rotating shaft (53), the rotating shaft (53) is rotatably connected to the top plate (4), and the bottom of the rotating shaft (53) is fixedly connected to a connecting rod (52), the top of the rotating shaft (53) is fixedly connected to a connecting tube (56), the circumference of the connecting rod (52) is symmetrically fixedly connected to two side plates (51), the connecting cavity is formed at the top of the connecting tube (56), and the connecting rod (52) and the side plate (51) match the connecting hole (81).

7. The fatigue life test bench for electric actuator according to claim 6, characterized in that: The circumference of the connecting tube (56) is symmetrically screwed with two limiting rods (55), and one end of the two limiting rods (55) extending to the outside of the connecting tube (56) is fixedly connected to a handle (54).

8. The fatigue life test bench for electric actuator according to claim 6, characterized in that: Two limiting holes (83) are symmetrically formed on the inner wall of the connecting hole (81); a through-type mounting hole (58) is symmetrically opened on the circumference of the connecting rod (52); the mounting hole (58) is located between the two side plates (51); and two third electric push rods (57) are symmetrically fixedly connected inside the mounting hole (58).

9. The fatigue life test bench for electric actuator according to claim 1, characterized in that: Two clamping members (3) are symmetrically mounted on the top of the top plate (4), and a clamping space for clamping the electric actuator is formed between the two clamping members (3); The clamping member (3) comprises a support plate (32), the top of the support plate (32) is fixedly connected to a top frame (33), the support plate (32) is screwed with a screw rod (34), one end of the screw rod (34) facing the electric actuator is fixedly connected to a clamping plate (35), and the other end is fixedly connected to a handle bar (36), and the top plate (4) is fixedly connected to two symmetrical sides with a second electric push rod (31), and the telescopic end of the second electric push rod (31) is fixedly connected to the bottom of the support plate (32).

10. A fatigue life test method for an electric actuator, characterized in that: The steps include: S1: Place the electric actuator to be tested between the two clamping plates (35), rotate the handle (36) and the screw rod (34), move the screw rod (34) relative to the support plate (32), drive the clamping plate (35) to move through the support plate (32), clamp the electric actuator through the two clamping plates (35), and connect the output end of the electric actuator to the connecting pipe (56); S2: Rotate the handle (54) and the limit rod (55) to move the limit rod (55) to the inside of the connecting tube (56), and the limit rod (55) contacts the output end of the electric actuator inside the connecting tube (56). After the electric actuator is fixed, the top plate (4) and the rotating shaft (53) are driven to move together through the first electric push rod (2), so that the side plate (51) and the connecting rod (52) are inserted into the connecting hole (81) on the load plate (82), so that the multiple load plates (82) are sleeved on the side plate (51) and the connecting rod (52); S3: The connecting pipe (56) is driven to rotate by an electric actuator, so that the connecting pipe (56), the side plate (51), the connecting rod (52) and the rotating shaft (53) rotate relative to the top plate (4), thereby driving the load plate (82) to rotate, and performing a fatigue life test.

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