Vibration test equipment matched with magnesium alloy rear armrest of electric vehicle

Abstract

The invention relates to the technical field of physical vibration test equipment, and discloses vibration test equipment matched with a magnesium alloy rear armrest of an electric vehicle, which comprises a test bench and further comprises a lifting plate arranged at the top of the test bench in an up-and-down movable manner; the sliding plate is slidably mounted in a sliding groove formed in the top of the lifting plate and used for bearing the armrest body; and the pressing sleeve is clamped, sleeved and pressed at the top of the armrest body. According to the vibration testing equipment matched with the magnesium alloy rear armrest of the electric vehicle, through the combined design of the lifting plate and the sliding plate, synchronous vibration testing of the armrest body in the up-down direction and the front-back direction can be achieved, the multi-dimensional load working condition of the armrest in actual use is comprehensively simulated, and then through collection and physical analysis of test data, the test accuracy is improved. The mechanical property and the load response of the armrest in actual use can be evaluated, so that the multi-dimensional performance of the armrest is comprehensively evaluated, and the authenticity and the comprehensiveness of the test are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of physical vibration testing equipment, in particular to a vibration testing equipment for a magnesium alloy rear armrest of an electric vehicle. Background Art

[0002] With the rapid development of the electric vehicle industry, vehicle lightweighting has become an important direction for improving vehicle performance and energy efficiency. Magnesium alloys are widely used in the manufacture of electric vehicle accessories, such as electric vehicle rear armrests, due to their advantages such as low density, high specific strength, and good shock absorption performance. However, magnesium alloy materials also have certain defects, such as low fatigue limit and impact resistance. Therefore, magnesium alloy rear armrests are prone to cracks, deformation, and even breakage due to long-term vibration or impact during actual use. Therefore, it is very necessary to conduct comprehensive mechanical testing of the vibration performance of magnesium alloy rear armrests.

[0003] Most traditional vibration test equipment uses a single-axis vibration mode, that is, the test object can only perform a single movement in the vertical or horizontal direction, and it is difficult to achieve synchronous vibration testing in the up and down and front and back directions, which makes it impossible to fully simulate the multi-dimensional loads that the handrail is subjected to in actual use. In addition, the vibration test equipment currently on the market is usually unable to apply intermittent instantaneous pressure to the test piece, which makes it difficult for the vibration test to restore the instantaneous force environment of the handrail under special working conditions such as bumps and external forces (such as pressing with the back support by hand), thereby limiting the authenticity and reference value of the test results, especially for magnesium alloys with poor impact resistance.

[0004] Based on this, we proposed a vibration testing equipment for magnesium alloy rear armrests of electric vehicles. Summary of the invention

[0005] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides a vibration testing device for a magnesium alloy rear armrest of an electric vehicle, which has the advantages of being able to realize synchronous vibration testing in the up and down and front and back directions, and being able to apply instantaneous pressure to the magnesium alloy rear armrest to test its impact resistance.

[0006] (II) Technical solution In order to achieve the above-mentioned purpose of being able to realize synchronous vibration testing in the up-down and front-back directions and being able to apply instantaneous pressure to the magnesium alloy rear armrest to test its impact resistance, the present invention provides the following technical solutions: a vibration testing device for an electric vehicle magnesium alloy rear armrest, comprising a test bench, and also comprising: A lifting plate is movably arranged on the top of the test bench; A sliding plate is slidably mounted in a sliding groove provided on the top of the lifting plate and is used to carry the handrail body; Press the sleeve, clamp the sleeve and press it tightly on the top of the handrail body; The pressing sleeve is installed on the cross arm through the tightener on the top thereof, and the end of the cross arm is connected to the pressure-applying mechanism, which can provide intermittent instantaneous pressure on the handrail body through the cross arm, the tightener and the pressing sleeve.

[0007] As a preferred technical solution of the present invention, a connecting plate is fixedly installed at the bottom of the lifting plate, the bottom end of the connecting plate passes through the test bench and is fixedly connected to a rectangular frame, an eccentric wheel is rotatably installed in the rectangular frame, and the eccentric wheel is driven by an offset driving shaft.

[0008] As a preferred technical solution of the present invention, the end of the driving shaft is fixedly connected with a rotating arm, the other end of the rotating arm is hinged to the lower hinge rod, the other end of the lower hinge rod is hinged to the vertical rod, the middle part of the vertical rod is rotatably mounted on a fixed seat through a central axis, and the fixed seat is fixedly mounted on the side of the test bench; An upper hinge rod is hinged at the top end of the vertical rod, and the other end of the upper hinge rod is rotatably installed in a connecting seat, and the connecting seat is fixedly installed at the end of the sliding plate.

[0009] As a preferred technical solution of the present invention, the clamp includes a push rod, an inner plate, a fixed cylinder and a lower support spring. The top of the pressing sleeve is fixedly connected to the inner plate via the push rod. The inner plate is movably arranged in the fixed cylinder and supported downward by the lower support spring. The fixed cylinder is arranged on the cross arm.

[0010] As a preferred technical solution of the present invention, the pressure mechanism includes a mounting plate, an inner moving plate, a piston, a vertical cabinet, a supporting spring, a bracket, a support arm and a connecting pipe; A bracket is supported on the side of the top of the sliding plate by a supporting arm, a vertical cabinet is fixedly installed on the bracket, a piston is movably arranged in the vertical cabinet, an inner moving plate is fixedly installed at the bottom of the piston, the inner moving plate is supported by a supporting spring, a mounting plate is fixedly installed on the side of the inner moving plate, and the end of the cross arm is fixedly installed on the mounting plate; One side of the top of the vertical cabinet is connected to a gas supply mechanism through a connecting pipe for instantaneous introduction of gas, and the other side of the top of the vertical cabinet is provided with fine holes for exhausting gas.

[0011] As a preferred technical solution of the present invention, the gas supply mechanism includes a gas cabinet, a movable plug, a transverse spring, a push rod and a push plate; A gas cabinet is fixedly installed on the side of the top of the lifting plate, and the gas cabinet is connected with the vertical cabinet through a connecting pipe, and a one-way exhaust valve is provided on the connecting pipe; The gas cabinet is also provided with a one-way air inlet valve; A movable plug is movably arranged in the gas cabinet, and the movable plug is supported by a transverse spring. A push plate is fixedly connected to the other side of the movable plug through a push rod, and the push plate can be pushed by the sliding plate.

[0012] As a preferred technical solution of the present invention, a vertical pole is fixedly installed on the top of the test bench, a connecting arm is fixedly connected to the top of the vertical pole, a loading rod is fixedly connected to the end of the connecting arm, a plurality of movable sleeves are installed on the loading rod, and the movable sleeves are connected to the impact ball through an elastic rod. When the armrest body is driven upward by the lifting plate, the armrest body will collide with the impact ball.

[0013] As a preferred technical solution of the present invention, the movable sleeve is slidably mounted on the loading rod; The outer wall protrusion of the loading rod is formed with a spline, and the spline is slidably arranged in a flower groove, and the flower groove is arranged on the inner wall of the moving sleeve.

[0014] As a preferred technical solution of the present invention, the pressing sleeve is a rubber sleeve, and a slot for clamping on the armrest body is provided at the bottom.

[0015] As a preferred technical solution of the present invention, the presser is slidably mounted on the cross arm.

[0016] (III) Beneficial effects Compared with the prior art, the present invention provides a vibration testing device for magnesium alloy rear armrests of electric vehicles, which has the following beneficial effects: 1. The vibration test equipment for the magnesium alloy rear armrest of the electric vehicle can realize synchronous vibration testing of the armrest body in the up and down and front and back directions through the combined design of the lifting plate and the sliding plate, and fully simulate the multi-dimensional load conditions of the armrest in actual use. Then, through the collection and physical analysis of the test data, it can evaluate the mechanical properties and load response of the armrest in actual use, thereby comprehensively evaluating the multi-dimensional performance of the armrest and ensuring the authenticity and comprehensiveness of the test.

[0017] 2. The vibration test equipment for the magnesium alloy rear armrest of the electric vehicle can apply instantaneous pressure on the armrest body through the pressure mechanism, and restore the instantaneous stress environment of the armrest body under special working conditions such as bumps and external forces (such as pressing with the hand back support), providing a more real and reliable basis for the evaluation of the fatigue performance and load-bearing capacity of magnesium alloy materials.

[0018] 3. The vibration test equipment for the magnesium alloy rear armrest of the electric vehicle can simulate the additional impact that the armrest body may withstand in actual use by impacting the armrest body on the impact ball, evaluate its impact resistance and stress concentration effect, and further improve the comprehensiveness of the armrest body test. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The axonometric Figure 1 ; Figure 2 The axonometric Figure 2 ; Figure 3 It is a front view of the present invention; Figure 4 It is an enlarged schematic diagram of the lifting plate part of the present invention; Figure 5 It is a cross-sectional view of the fixed cylinder part of the present invention; Figure 6 It is a cross-sectional view of the vertical cabinet part of the present invention; Figure 7 It is an enlarged schematic diagram of the loading rod part of the present invention; Figure 8 It is a side view of the armrest body of the present invention.

[0020] In the figure: 1, test bench; 2, lifting plate; 3, slide; 4, sliding plate; 5, handrail body; 6, driving shaft; 7, eccentric wheel; 8, rectangular frame; 9, connecting plate; 10, rotating arm; 11, lower hinge rod; 12, vertical rod; 13, fixed seat; 14, upper hinge rod; 15, connecting seat; 16, pressing sleeve; 17, push rod; 18, inner plate; 19, fixing cylinder; 20, lower support spring; 21, cross arm; 22, mounting plate; 23, inner moving plate; 24, piston; 25, vertical cabinet; 26, supporting spring; 27, bracket; 28, support arm; 29, connecting pipe; 30, gas cabinet; 31, moving plug; 32, horizontal spring; 33, push rod; 34, push plate; 35, vertical rod; 36, connecting arm; 37, loading rod; 38, moving sleeve; 39, elastic rod; 40, impact ball. DETAILED DESCRIPTION

[0021] 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.

[0022] Embodiment 1: See also Figure 1-Figure 4 A vibration test device for a magnesium alloy rear armrest of an electric vehicle includes a test bench 1. The test bench 1 can be fixed on the ground by supporting legs or installed on the side of a workbench. In short, it only needs to be kept fixed, and technicians in this field can select the fixing method as needed.

[0023] In this embodiment, a lifting plate 2 is movably arranged on the top of the test bench 1, specifically, Figure 3 As shown, a connecting plate 9 is fixedly installed at the bottom of the lifting plate 2, and the bottom end of the connecting plate 9 passes through the test bench 1 and is fixedly connected to a rectangular frame 8. An eccentric wheel 7 is rotatably installed in the rectangular frame 8, and the eccentric wheel 7 is driven by an offset driving shaft 6, and the driving shaft 6 is driven by a motor. When the driving shaft 6 drives the eccentric wheel 7 to rotate, the eccentric wheel 7 can drive the rectangular frame 8 to move up and down. The up and down movement of the rectangular frame 8 can drive the lifting plate 2 to move up and down through the connecting plate 9, thereby realizing "up and down vibration".

[0024] like Figure 2 As shown, a sliding plate 4 is slidably installed in the slide groove 3 opened at the top of the lifting plate 2. Specifically, a rotating arm 10 is fixedly connected to the end of the driving shaft 6, and the other end of the rotating arm 10 is hinged to the lower hinge rod 11, and the other end of the lower hinge rod 11 is hinged to the vertical rod 12. The middle part of the vertical rod 12 is rotatably installed on the fixed seat 13 through the central axis, and the fixed seat 13 is fixedly installed on the side of the test bench 1. The top of the vertical rod 12 is hinged with an upper hinge rod 14, and the other end of the upper hinge rod 14 is rotatably installed in the connecting seat 15, and the connecting seat 15 is fixedly installed at the end of the sliding plate 4. When the driving shaft 6 drives the eccentric wheel 7 to rotate to move the lifting plate 2 up and down, it will also drive the rotating arm 10 to rotate. The rotating arm 10 rotates to pull or push the lower hinge rod 11, and then through the transmission of the vertical rod 12, it can pull or push the upper hinge rod 14, and then, it can make the sliding plate 4 slide in the slide groove 3. By sliding the sliding plate 4 back and forth in the slide groove 3, "left and right vibration" can be achieved, and the handrail body 5 can be vibrated in a mechanical way. Test.

[0025] In this embodiment, the magnesium alloy armrest body 5 is fixed on the sliding plate 4, so that synchronous vibration testing of the armrest body 5 in the up and down and front and back directions can be achieved, fully simulating the multi-dimensional load conditions of the armrest in actual use, and improving the authenticity and comprehensiveness of the test.

[0026] The armrest body 5 is fixed to the sliding plate 4 by bolts through its own Z-shaped support feet.

[0027] like Figure 4 As shown, a pressing sleeve 16 is clamped on the top of the armrest body 5. The pressing sleeve 16 is a rubber sleeve, and a slot for clamping on the armrest body 5 is opened at the bottom. Through the clamping of the pressing sleeve 16 on the top of the armrest body 5, the actual force on the armrest body 5 when being rested by the hand can be simulated, thereby ensuring the authenticity and reliability of the test results.

[0028] Embodiment 2: See also Figure 5-Figure 7On the basis of the first embodiment, a pressure mechanism is added in the present embodiment. The pressure mechanism can provide intermittent instantaneous pressure on the armrest body 5 through the cross arm 21, the clamp and the pressing sleeve 16, thereby simulating and restoring the instantaneous stress environment of the armrest body 5 under special working conditions such as bumps and external forces (such as pressing with the back support by hand), providing a more realistic and reliable basis for the evaluation of the fatigue performance and load-bearing capacity of the magnesium alloy material.

[0029] like Figure 4 As shown, the pressing sleeve 16 is mounted on the cross arm 21 through the pressing device at the top thereof, and the end of the cross arm 21 is connected to the pressing mechanism; In this embodiment, the clamp includes a push rod 17, an inner plate 18, a fixed cylinder 19 and a lower support spring 20. The top of the pressing sleeve 16 is fixedly connected to the inner plate 18 through the push rod 17. The inner plate 18 is movably arranged in the fixed cylinder 19 and is supported downward by the lower support spring 20. The fixed cylinder 19 is arranged on the cross arm 21. The downward supporting force provided by the lower support spring 20 can enable the pressing sleeve 16 to always maintain close contact with the armrest body 5, thereby ensuring a stable pressure effect.

[0030] In the present invention, the pressure mechanism includes a mounting plate 22, an inner moving plate 23, a piston 24, a vertical cabinet 25, a support spring 26, a bracket 27, a support arm 28 and a connecting pipe 29. Figure 6 As shown, a bracket 27 is supported on the side of the top of the sliding plate 4 by a support arm 28, and a vertical cabinet 25 is fixedly installed on the bracket 27. A piston 24 is movably arranged in the vertical cabinet 25, and an inner moving plate 23 is fixedly installed at the bottom of the piston 24. The inner moving plate 23 is supported by a supporting spring 26, and a mounting plate 22 is fixedly installed on the side of the inner moving plate 23. The end of the cross arm 21 is fixedly installed on the mounting plate 22. One side of the top of the vertical cabinet 25 is connected to an air supply mechanism through a connecting pipe 29 for instantaneous introduction of gas. A fine hole is provided on the other side of the top of the vertical cabinet 25 for exhausting gas. When the air supply mechanism instantaneously introduces gas, the piston 24 will be pushed downward under the action of air pressure. The downward movement of the piston 24 can provide instantaneous pressure on the armrest body 5 through the cross arm 21, the clamp and the pressing sleeve 16. Then, the gas in the vertical cabinet 25 is discharged through the fine hole, and the instantaneous pressure disappears.

[0031] The gas supply mechanism specifically includes a gas cabinet 30, a movable plug 31, a transverse spring 32, a push rod 33 and a push plate 34. Figure 6 A gas cabinet 30 is fixedly installed on the side of the top of the lifting plate 2. The gas cabinet 30 is connected to the vertical cabinet 25 through a connecting pipe 29, and a one-way exhaust valve is provided on the connecting pipe 29. A one-way air intake valve is also provided on the gas cabinet 30. A movable plug 31 is movably provided in the gas cabinet 30. The movable plug 31 is supported by a transverse spring 32. The other side of the movable plug 31 is fixedly connected to a push plate 34 through a push rod 33. The push plate 34 can be pushed by the sliding plate 4. When the sliding plate 4 moves left and right (by Figure 6When the movable plug 31 moves to the right, the air in the gas cabinet 30 can be filled into the vertical cabinet 25 through the connecting pipe 29, thereby providing instantaneous pressure; when the movable plug 31 moves to the left under the restoring force of the horizontal spring 32, it is used to pass through the one-way air inlet valve for the next cycle; Thus, in this embodiment, when the sliding plate 4 moves left and right to simulate left and right vibrations, the air supply mechanism and the pressure-applying mechanism can cyclically apply instantaneous pressure on the armrest body 5, thereby restoring the instantaneous stress environment of the armrest body 5 under special working conditions such as bumps and external forces (such as pressing with the back support by hand), thereby providing a more realistic and reliable basis for the evaluation of the fatigue properties and load-bearing capacity of the magnesium alloy material.

[0032] In the present invention, the clamp is slidably installed on the cross arm 21, and its position is adjustable, so as to facilitate multi-point testing of the armrest body 5; the specific adjustment method can be selected by technical personnel in this field according to actual needs. For example, a screw rod can be rotatably installed in the cross arm 21, a nut can be threadedly connected to the outer wall of the screw rod, and the nut can be fixedly connected to the clamp.

[0033] Embodiment three: See also Figure 2 , Figure 7 and Figure 8 On the basis of the first or second embodiment, in this embodiment, a vertical pole 35 is fixedly installed on the top of the test bench 1, a connecting arm 36 is fixedly connected to the top of the vertical pole 35, a loading rod 37 is fixedly connected to the end of the connecting arm 36, and a plurality of movable sleeves 38 are installed on the loading rod 37, each movable sleeve 38 is connected to an impact ball 40 through an elastic rod 39, when the armrest body 5 is driven by the lifting plate 2 to move upward, the armrest body 5 will collide with the impact ball 40, thereby simulating an impact load; In this embodiment, the movable sleeve 38 is slidably mounted on the loading rod 37. Specifically, a spline is formed on a protrusion on the outer wall of the loading rod 37. The spline is slidably arranged in a flower groove. The flower groove is provided on the inner wall of the movable sleeve 38. Through the cooperation between the spline and the flower groove, the movable sleeve 38 can freely adjust its position on the loading rod 37 to adapt to the testing requirements of the armrest body 5 of different sizes, and it is also convenient to avoid the pressing sleeve 16.

[0034] The elastic rod 39 can be bent to provide a buffering capability for the impact ball 40 , thereby making the test closer to the actual working condition.

[0035] Through the impact test of the impact ball 40, this embodiment can reproduce the stress concentration caused by external force in the vehicle vibration of the armrest, evaluate its impact resistance and fatigue life, and combined with the vibration test in Example 1 and the instantaneous pressure test in Example 2, this equipment can comprehensively cover the performance of the armrest under complex loads, and provide a scientific basis for the design and optimization of magnesium alloy armrests.

[0036] 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 vibration test device for a magnesium alloy rear armrest of an electric vehicle, comprising a test bench (1), characterized in that: Also includes: A lifting plate (2) is movably arranged on the top of the test bench (1); A sliding plate (4) is slidably mounted in a sliding groove (3) provided at the top of the lifting plate (2) and is used to carry the armrest body (5); A pressing sleeve (16) is clamped and pressed tightly on the top of the handrail body (5); The pressing sleeve (16) is mounted on the cross arm (21) via a tightener at the top thereof, and the end of the cross arm (21) is connected to a pressure-applying mechanism, which is capable of providing intermittent instantaneous pressure on the handrail body (5) via the cross arm (21), the tightener and the pressing sleeve (16).

2. The vibration testing equipment for magnesium alloy rear armrest of electric vehicle according to claim 1, characterized in that: A connecting plate (9) is fixedly mounted on the bottom of the lifting plate (2); the bottom end of the connecting plate (9) passes through the test bench (1) and is fixedly connected to a rectangular frame (8); an eccentric wheel (7) is rotatably mounted in the rectangular frame (8); the eccentric wheel (7) is driven by an offset drive shaft (6).

3. The vibration testing equipment for magnesium alloy rear armrest of electric vehicle according to claim 2, characterized in that: The end of the driving shaft (6) is fixedly connected to a rotating arm (10), the other end of the rotating arm (10) is hinged to a lower hinge rod (11), the other end of the lower hinge rod (11) is hinged to a vertical rod (12), the middle part of the vertical rod (12) is rotatably mounted on a fixed seat (13) via a central axis, and the fixed seat (13) is fixedly mounted on a side of the test bench (1); An upper hinge rod (14) is hingedly connected to the top end of the vertical rod (12); the other end of the upper hinge rod (14) is rotatably mounted in a connecting seat (15); and the connecting seat (15) is fixedly mounted on the end of the sliding plate (4).

4. The vibration testing equipment for magnesium alloy rear armrest of electric vehicle according to claim 1, characterized in that: The clamp comprises a push rod (17), an inner plate (18), a fixed cylinder (19) and a lower support spring (20); the top of the pressing sleeve (16) is fixedly connected to the inner plate (18) via the push rod (17); the inner plate (18) is movably arranged in the fixed cylinder (19) and supported downward by the lower support spring (20); the fixed cylinder (19) is arranged on a cross arm (21).

5. A vibration testing device for magnesium alloy rear armrest of electric vehicle according to claim 1 or 4, characterized in that: The pressure-applying mechanism comprises a mounting plate (22), an inner moving plate (23), a piston (24), a vertical cabinet (25), a supporting spring (26), a bracket (27), a supporting arm (28) and a connecting pipe (29); A bracket (27) is supported on the side of the top of the sliding plate (4) by a supporting arm (28), a vertical cabinet (25) is fixedly mounted on the bracket (27), a piston (24) is movably arranged in the vertical cabinet (25), an inner moving plate (23) is fixedly mounted on the bottom of the piston (24), the inner moving plate (23) is supported by a supporting spring (26), a mounting plate (22) is fixedly mounted on the side of the inner moving plate (23), and the end of the cross arm (21) is fixedly mounted on the mounting plate (22); One side of the top of the vertical cabinet (25) is connected to a gas supply mechanism via a connecting pipe (29) for instantaneous introduction of gas, and the other side of the top of the vertical cabinet (25) is provided with fine holes for exhausting gas.

6. The vibration testing equipment for magnesium alloy rear armrest of electric vehicle according to claim 5, characterized in that: The gas supply mechanism comprises a gas cabinet (30), a movable plug (31), a transverse spring (32), a push rod (33) and a push plate (34); A gas cabinet (30) is fixedly mounted on the side of the top of the lifting plate (2), and the gas cabinet (30) is connected to the vertical cabinet (25) through a connecting pipe (29), and a one-way exhaust valve is provided on the connecting pipe (29); The gas cabinet (30) is also provided with a one-way air inlet valve; A movable plug (31) is movably arranged in the gas cabinet (30), and the movable plug (31) is supported by a transverse spring (32). A push plate (34) is fixedly connected to the other side of the movable plug (31) via a push rod (33), and the push plate (34) can be pushed by the sliding plate (4).

7. The vibration testing equipment for magnesium alloy rear armrest of electric vehicle according to claim 1, characterized in that: A vertical pole (35) is fixedly mounted on the top of the test bench (1); a connecting arm (36) is fixedly connected to the top of the vertical pole (35); a loading rod (37) is fixedly connected to the end of the connecting arm (36); a plurality of movable sleeves (38) are mounted on the loading rod (37); the movable sleeves (38) are connected to an impact ball (40) via an elastic rod (39); when the armrest body (5) is driven by the lifting plate (2) to move upward, the armrest body (5) will collide with the impact ball (40).

8. The vibration testing equipment for magnesium alloy rear armrest of electric vehicle according to claim 7, characterized in that: The movable sleeve (38) is slidably mounted on the loading rod (37); The outer wall protrusion of the loading rod (37) is formed with a spline, and the spline is slidably arranged in a flower groove, and the flower groove is opened on the inner wall of the moving sleeve (38).

9. The vibration testing equipment for magnesium alloy rear armrest of electric vehicle according to claim 1, characterized in that: The pressing sleeve (16) is a rubber sleeve, and a slot for clamping on the armrest body (5) is provided at the bottom.

10. A vibration testing device for magnesium alloy rear armrests of electric vehicles according to claim 1 or 4, characterized in that: The presser is slidably mounted on the cross arm (21).

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