Rotatable sample telescopic experiment frame

Abstract

The utility model relates to the technical field of electric coating preparation experiment devices, in particular to a rotatable sample telescopic experiment frame which comprises a supporting platform, a transverse telescopic device, a longitudinal telescopic device, a gear rotating device and an external electrode, the gear rotating device is arranged on the supporting platform; the lower end of the gear rotating device drives the sample to rotate; the external electrode is in contact with the gear rotating device and is used for electrifying the sample. Transverse telescopic devices used for adjusting the transverse width of the experiment frame are symmetrically arranged on the two sides of the supporting platform. The transverse telescopic device is connected with a longitudinal telescopic device used for adjusting the height. Through the design of the transverse telescopic device and the longitudinal telescopic device, the width and the height of the experiment frame can be adjusted so as to adapt to experiment pools with different sizes and depths, and the application range of the experiment frame is widened. The test sample is allowed to rotate in the preparation process of the electric coating through the gear rotating device, so that the uniformity of the coating is ensured, and the experiment efficiency and the coating quality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of an electric coating preparation experimental device, in particular to a rotatable sample telescopic experimental frame. Background Art

[0002] The electro-coating manufacturing technology is a technology that forms a coating on the surface of the sample by reducing the ions in the test cell. Due to the difference in the electrochemical reaction rate and the ion diffusion rate in the solution, electrochemical and concentration polarization phenomena will occur near the cathode. The electro-coating technology is also the most widely used and mature coating manufacturing technology.

[0003] In the process of preparing electrocoating in the laboratory, due to the different number of samples required, the size of the experimental pool used is also different, and the operation during the experiment also requires the assistance of the test stand. The electrocoating technology is now relatively complete, but there is still a lack of improvement in the test stand. The traditional test stands currently used in laboratories are mostly suspended by hanging rods, which have a relatively simple structure and cannot easily adjust the width and height of the test stand.

[0004] Therefore, it is of practical significance to design a new type of retractable experimental stand that can autonomously rotate samples for use in the field of electrochemical coatings. Utility Model Content

[0005] The purpose of the utility model is to provide a rotatable sample telescopic test stand, which can meet the use requirements of coating and plating preparation experimental devices of various shapes and sizes and realize the autonomous rotation of the sample, thereby solving the technical problem that the test stand in the background technology cannot conveniently adjust the width and height of the test stand.

[0006] In order to achieve the above-mentioned object, the utility model provides the following technical solutions: a rotatable sample telescopic experimental stand, comprising: a supporting platform, a lateral telescopic device, a longitudinal telescopic device, a gear rotating device and an external electrode;

[0007] The gear rotating device is arranged on the supporting platform; the lower end of the gear rotating device drives the sample to rotate;

[0008] The external electrode is in contact with the gear rotating device and is used to energize the sample;

[0009] The two sides of the support platform are symmetrically provided with transverse telescopic devices for adjusting the transverse width of the experimental frame;

[0010] A longitudinal telescopic device for adjusting the height is connected to one side of the two transverse telescopic devices away from the supporting platform.

[0011] Further, the lateral telescopic device comprises an outer telescopic sleeve, a middle supporting sleeve and an inner telescopic sleeve;

[0012] The fixed end of the outer telescopic sleeve is fixed on the longitudinal telescopic device; one end of the middle support sleeve extends into the movable end of the outer telescopic sleeve; the inner telescopic sleeve is sleeved inside the middle support sleeve;

[0013] The fixed end of the inner telescopic sleeve is fixedly connected to the support platform;

[0014] A driving device is arranged in the middle supporting sleeve; the driving device is connected to the outer telescopic sleeve and the inner telescopic sleeve respectively, and the driving device drives the outer telescopic sleeve and the inner telescopic sleeve to move relative to each other to adjust the transverse width of the experimental frame.

[0015] Furthermore, the driving device includes two pulleys and a belt; the two pulleys are rotatably connected in the middle supporting sleeve, and a belt is sleeved on the two pulleys. The upper part of the belt is connected to the outer telescopic sleeve, and the lower part of the belt is connected to the inner telescopic sleeve. The belt is driven to move by manually stretching the inner telescopic sleeve, and the outer telescopic sleeve is driven to move by the movement of the belt.

[0016] Furthermore, the driving device also includes a power source, which is connected to the pulley. The power source drives the pulley and the belt to move, and the belt movement drives the outer telescopic sleeve and the inner telescopic sleeve to move in opposite directions respectively.

[0017] Furthermore, a telescopic rod buckle is provided on one end of the middle supporting sleeve close to the supporting platform, and a corresponding transverse positioning hole is provided on one end of the inner telescopic sleeve close to the supporting platform; the telescopic rod buckle is clamped in the transverse positioning hole to position the inner telescopic sleeve and the middle supporting sleeve.

[0018] Furthermore, the longitudinal telescopic device includes an external fixed bracket, an internal movable bracket and a positioning structure;

[0019] The external fixing bracket is placed vertically, and a plurality of longitudinal positioning holes are arranged on the external fixing bracket;

[0020] The internal movable bracket is sleeved inside the external fixed bracket, and the internal movable bracket can move up and down along the inner wall of the external fixed bracket, so as to adjust the height of the rotatable sample telescopic experimental frame;

[0021] The positioning structure is arranged in the internal movable bracket, and the positioning structure can be snapped on the longitudinal positioning hole, so as to lock the external fixed bracket and the internal movable bracket.

[0022] Further, the positioning structure includes a connecting rod, a rocker, a rotating shaft, and a pin;

[0023] The connecting rod is arranged inside the internal movable bracket, the lower end of the connecting rod is hinged to one end of the rocker, and the other end of the rocker is provided with a pin; a rotating shaft is provided in the middle of the rocker, and the rotating shaft is fixed on the internal movable bracket; the rocker is rotated by controlling the connecting rod to move up and down, and then the pin is driven to move; a plurality of longitudinal positioning holes are provided on the external fixed bracket, and one of the pins is selectively inserted into the longitudinal positioning hole.

[0024] Further, the gear rotating device includes a motor, a first bevel gear, a second bevel gear, an upright transmission shaft and a shaft sleeve;

[0025] The motor is fixed on the supporting platform;

[0026] The sleeve vertically penetrates the support platform and is fixedly connected to the support platform; a square hole for placing an external electrode is radially opened at the lower part of the sleeve;

[0027] The transmission shaft is sleeved in the shaft sleeve and is rotatably connected to the shaft sleeve; a sample hanging hole for hanging a sample is provided at the lower end of the transmission shaft;

[0028] The first bevel gear is connected to the output end of the motor, and the second bevel gear is connected to the top end of the transmission shaft; the first bevel gear and the second bevel gear are meshed with each other to transmit power; the motor drives the first bevel gear, and the first bevel gear drives the transmission shaft to rotate, so as to realize the rotation of the sample.

[0029] Furthermore, a contact groove is provided at one end of the external electrode; the contact groove is a semicircular notch structure; the external electrode is inserted into the square hole at the bottom of the sleeve so that the contact groove contacts the transmission shaft to realize electrification of the sample.

[0030] Beneficial Effects

[0031] The utility model enables users to easily adjust the width and height of the experimental frame through the design of the horizontal and vertical telescopic devices to adapt to experimental pools of different sizes and depths, thereby increasing the application range of the experimental frame.

[0032] The gear rotating device of the utility model allows the sample to be rotated during the preparation process of the electrocoating, and realizes uniform rotation and electrification of the sample at the same time, ensuring the uniformity of the coating, thereby improving the experimental efficiency and the coating quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0034] Figure 1 It is a general schematic diagram of the rotatable sample telescopic experimental stand disclosed in the utility model;

[0035] Figure 2 It is a schematic diagram of a lateral telescopic device of a rotatable sample telescopic experimental stand disclosed in the utility model;

[0036] Figure 3 It is a cross-sectional view of the lateral telescopic device of the rotatable sample telescopic experimental stand disclosed in the utility model;

[0037] Figure 4 This is a structural diagram of a middle support sleeve of a rotatable sample telescopic test stand disclosed in the utility model;

[0038] Figure 5 It is a schematic diagram of the inner telescopic sleeve of the rotatable sample telescopic experimental stand disclosed in the utility model;

[0039] Figure 6 It is a schematic diagram of the longitudinal telescopic device of the rotatable sample telescopic experimental stand disclosed in the utility model;

[0040] Figure 7 It is a schematic diagram of the gear rotating device of the rotatable sample telescopic experimental stand disclosed in the utility model;

[0041] Figure 8 It is a partial schematic diagram of the gear rotating device of the rotatable sample telescopic experimental stand disclosed in the utility model;

[0042] Fig. 9 The utility model discloses a schematic diagram of an external electrode and a transmission shaft of a rotatable sample telescopic experimental stand.

[0043] In the figure: 1. lateral telescopic device; 2. longitudinal telescopic device; 3. gear rotating device; 4. external electrode; 5. pin; 6. rotating shaft; 7. rocker; 8. connecting rod; 9. spring; 10. outer telescopic sleeve; 11. pulley; 12. belt; 13. middle support sleeve; 14. telescopic rod buckle; 15. first bevel gear; 16. motor; 17. sample hanging hole; 18. longitudinal positioning hole; 19. transmission shaft; 20. inner telescopic sleeve; 21. supporting platform; 22. square hole; 23. lateral positioning hole; 24. contact groove; 25. bushing; 26. second bevel gear. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: Figure 1-9 As shown, a rotatable sample telescopic experimental stand comprises: a supporting platform 21, a transverse telescopic device 1, a longitudinal telescopic device 2, a gear rotating device 3 and an external electrode 4;

[0046] The gear rotating device 3 is disposed on the supporting platform 21; the lower end of the gear rotating device 3 is connected with a sample;

[0047] The external electrode 4 is in contact with the gear rotating device 3 and is used to energize the sample.

[0048] The two sides of the support platform 21 are symmetrically provided with transverse telescopic devices 1 for adjusting the transverse width of the experimental frame;

[0049] The two transverse telescopic devices 1 are connected to a longitudinal telescopic device 2 for adjusting the height of the experimental frame on one side away from the supporting platform 21 ; the longitudinal telescopic device 2 is placed on the working plane as a supporting structure of the experimental frame.

[0050] Further, such as Figure 2-5 As shown, the transverse telescopic device 1 includes an outer telescopic sleeve 10, a middle support sleeve 13, and an inner telescopic sleeve 20;

[0051] The fixed end of the outer telescopic sleeve 10 is fixed on the longitudinal telescopic device 2; the middle support sleeve 13 is sleeved inside the outer telescopic sleeve 10, and the inner telescopic sleeve 20 is sleeved inside the middle support sleeve 13;

[0052] The fixed end of the inner telescopic sleeve 20 is fixedly connected to the support platform 21;

[0053] A driving device is disposed in the middle supporting sleeve 13; the driving device is connected to the outer telescopic sleeve 10 and the inner telescopic sleeve 20 respectively, and the driving device drives the outer telescopic sleeve 10 and the inner telescopic sleeve 20 to move relative to each other to achieve adjustment of the lateral width.

[0054] Furthermore, the driving device includes two pulleys 11 and a belt 12; the two pulleys 11 are rotatably connected in the middle supporting sleeve 13, and the two pulleys 11 are provided with belts 12. The upper part of the belt 12 is connected to the outer telescopic sleeve 10 through a fastening bolt, and the lower part of the belt 12 is connected to the inner telescopic sleeve 20 through a fastening bolt. The belt 12 is driven to move by manually stretching the inner telescopic sleeve 20, and the outer telescopic sleeve 10 is driven to move by the movement of the belt 12. In this case, the relative position of the inner telescopic sleeve 20 and the outer telescopic sleeve 10 can be adjusted by manual stretching, thereby realizing the adjustment of the lateral width of the experimental frame.

[0055] Furthermore, in another embodiment, the driving device also includes a power source, which is installed on the support sleeve 13 and connected to the pulley. The power source can be a motor. The pulley 11 is driven by the power source, and the pulley 11 drives the belt 12 to move. When the belt 12 moves, the upper and lower parts of the belt 12 move in opposite directions, respectively driving the outer telescopic sleeve 10 and the inner telescopic sleeve 20 to move in opposite directions. In this case, the movement of the outer telescopic sleeve 10 and the inner telescopic sleeve 20 can be driven by controlling the power source, thereby achieving the purpose of automatically adjusting the lateral width of the experimental frame.

[0056] Furthermore, a telescopic rod buckle 14 is provided on one end of the middle support sleeve 13 close to the support platform 21. The telescopic rod buckle 14 in this embodiment is a small hook-shaped or buckle-shaped structure, which is used to position the inner telescopic sleeve 20 and the middle support sleeve 13 to ensure the stability of the lateral telescopic device 1.

[0057] The corresponding inner telescopic sleeve 20 is provided with 8 cm equidistant transverse positioning holes 23 on one end close to the supporting platform 21 ; the telescopic rod buckle 14 is snapped into the transverse positioning hole 23 to position the inner telescopic sleeve 20 and the middle supporting sleeve 13 .

[0058] Further, such as Figure 6 As shown, the longitudinal telescopic device 2 includes an external fixed bracket, an internal movable bracket and a positioning structure;

[0059] The external fixing bracket is placed vertically, the interior of the external fixing bracket is a hollow structure, and a plurality of longitudinal positioning holes 18 are arranged on the external fixing bracket; the longitudinal positioning holes 18 are arranged along the length direction of the external fixing bracket, and the interval between adjacent longitudinal positioning holes 18 is 1 cm;

[0060] The internal movable bracket is sleeved inside the external fixed bracket, and the internal movable bracket can move up and down along the inner wall of the external fixed bracket, so as to adjust the height of the rotatable sample telescopic experimental frame;

[0061] The positioning structure is arranged in the internal movable bracket, and the positioning structure can be snapped onto the longitudinal positioning hole 18, thereby locking the external fixed bracket and the internal movable bracket.

[0062] Further, the positioning structure includes a connecting rod 8, a rocker 7, a rotating shaft 6, a pin 5 and a spring 9;

[0063] The connecting rod 8 is arranged inside the internal movable bracket, a button is arranged at the upper end of the connecting rod 8, the lower end of the connecting rod 8 is hinged to one end of the rocker 7, and a pin 5 is arranged at the other end of the rocker 7; a rotating shaft 6 is arranged in the middle of the rocker 7, and the rotating shaft 6 is fixed on the internal movable bracket; the rocker 7 is driven by controlling the connecting rod 8 to drive the pin 5 to move;

[0064] A partition is provided at a position near the upper end of the internal movable bracket;

[0065] The spring 9 is sleeved on the connecting rod 8 and abuts between the button and the partition; in the initial state, the spring 9 is in a compressed state, and the spring 9 supports the button upward, so that the connecting rod 8 is in an upward state, and the connecting rod 8 drives the rocker 7 to move upward, so that the pin 5 at the other end of the rocker 7 is outwardly clamped in the longitudinal positioning hole 18 on the external fixed bracket. At this time, the external fixed bracket and the internal movable bracket are in a locked state and cannot move relative to each other;

[0066] When the button on the upper end of the connecting rod 8 is pressed downward, the connecting rod 8 moves downward, driving one end of the rocker 7 to move downward, and the rocker 7 rotates around the rotating shaft 6. The pin 5 at the other end of the rocker 7 is retracted inward and leaves the longitudinal positioning hole 18 on the external fixed bracket. At this time, the external fixed bracket and the internal movable bracket can be unlocked and move relative to each other to adjust the height of the experimental frame.

[0067] Further, such as Figure 7-9 As shown, the gear rotating device 3 includes a motor 16, a first bevel gear 15, a second bevel gear 26, an upright transmission shaft 19 and a shaft sleeve 25;

[0068] The motor 16 is fixed on the supporting platform 21;

[0069] The sleeve 25 vertically penetrates the support platform 21 and is fixedly connected to the support platform 21; a square hole 22 for placing the external electrode 4 is radially opened at the lower part of the sleeve 25;

[0070] The transmission shaft 19 is sleeved in the shaft sleeve 25 and is rotatably connected to the shaft sleeve 25; a sample hanging hole 17 for hanging a sample is provided at the lower end of the transmission shaft 19;

[0071] The first bevel gear 15 is connected to the output end of the motor 16, and the second bevel gear 26 is connected to the top end of the transmission shaft 19; the first bevel gear 15 and the second bevel gear 26 are meshed with each other to transmit power; the motor 16 drives the first bevel gear 15, and the first bevel gear 15 drives the transmission shaft 19 to rotate, so as to realize the rotation of the sample.

[0072] Further, such as Fig. 9 As shown, a contact groove 24 is provided at one end of the external electrode 4; the contact groove 24 is a semicircular notch structure; the main body of the external electrode 4 is a rectangular parallelepiped structure, and the external electrode 4 can be inserted into the square hole 22 at the bottom of the sleeve 25 so that the contact groove 24 is connected to the transmission shaft 19 to realize the power supply of the sample. The gear rotating device 3 allows the sample to rotate 360 ​​degrees during the preparation process of the electro-coating to ensure the uniformity of the coating, thereby improving the experimental efficiency and coating quality.

[0073] How it works

[0074] Transverse telescopic device 1: In manual mode, the belt 12 is driven to move by manually stretching the inner telescopic sleeve 20, and the outer telescopic sleeve 10 is driven to move by the movement of the belt 12. In this case, the relative position of the inner telescopic sleeve 20 and the outer telescopic sleeve 10 can be adjusted by manual stretching, thereby realizing the adjustment of the transverse width of the experimental frame.

[0075] In the automatic mode, the pulley 11 is driven by the power source, and the pulley 11 drives the belt 12 to move, thereby driving the outer telescopic sleeve 10 and the inner telescopic sleeve 20 to move in opposite directions, thereby achieving the purpose of automatically adjusting the horizontal width of the experimental frame.

[0076] Longitudinal telescopic device 2: By pressing the button on the upper end of the connecting rod 8, the spring 9 is compressed, and the rocker 7 drives the pin 5 to retract inward, thereby unlocking the internal movable bracket, allowing it to move up and down along the external fixed bracket to adjust the height of the experimental frame.

[0077] Gear rotating device 3: The motor 16 drives the first bevel gear 15, and the first bevel gear 15 drives the transmission shaft 19 to rotate, so as to realize 360-degree rotation of the sample, so as to obtain a uniform coating during the electrocoating preparation process.

[0078] External electrode 4: connected to the transmission shaft 19 through the contact groove 24 to realize the power supply of the sample for the electric coating preparation experiment.

[0079] Specific use process:

[0080] First, according to the size of the experimental pool, adjust the transverse telescopic device 1 to match the width of the experimental rack with the experimental pool. According to the depth of the experimental pool, press the button on the upper end of the connecting rod 8 to adjust the longitudinal telescopic device 2 to set the height of the experimental rack.

[0081] Then hang the sample on the sample hanging hole 17 of the transmission shaft 19 and ensure that it is fixed. Insert the external electrode 4 into the square hole 22 at the bottom of the sleeve 25 and connect it to the transmission shaft 19, and energize the sample through the external electrode 4.

[0082] Finally, the motor 16 is turned on to rotate the sample through the gear rotating device 3. The electrocoating preparation experiment is carried out while the sample is rotating to ensure uniform coating. After the experiment is completed, the motor 16 is turned off, the sample is removed, and the experimental frame is cleaned and maintained to complete the experimental work.

[0083] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A rotatable sample telescopic test stand, characterized in that: include: A supporting platform (21), a transverse telescopic device (1), a longitudinal telescopic device (2), a gear rotating device (3) and an external electrode (4); The gear rotating device (3) is arranged on the supporting platform (21); the lower end of the gear rotating device (3) drives the sample to rotate; The external electrode (4) is in contact with the gear rotating device (3) and is used to energize the sample; The two sides of the support platform (21) are symmetrically provided with transverse telescopic devices (1) for adjusting the transverse width of the experimental frame; A longitudinal telescopic device (2) for adjusting the height is connected to one side of the two transverse telescopic devices (1) away from the supporting platform (21).

2. The rotatable sample telescopic test stand according to claim 1, characterized in that: The transverse telescopic device (1) comprises an outer telescopic sleeve (10), a middle supporting sleeve (13) and an inner telescopic sleeve (20); The fixed end of the outer telescopic sleeve (10) is fixed on the longitudinal telescopic device (2); one end of the middle support sleeve (13) extends into the movable end of the outer telescopic sleeve (10); the inner telescopic sleeve (20) is sleeved inside the middle support sleeve (13); The fixed end of the inner telescopic sleeve (20) is fixedly connected to the supporting platform (21); A driving device is arranged inside the middle supporting sleeve (13); the driving device is connected to the outer telescopic sleeve (10) and the inner telescopic sleeve (20) respectively, and the driving device drives the outer telescopic sleeve (10) and the inner telescopic sleeve (20) to move relative to each other so as to adjust the transverse width of the experimental frame.

3. The rotatable sample telescopic test stand according to claim 2, characterized in that: The driving device comprises two pulleys (11) and a belt (12); the two pulleys (11) are rotatably connected in a middle supporting sleeve (13); a belt (12) is sleeved on the two pulleys (11); the upper part of the belt (12) is connected to an outer telescopic sleeve (10); the lower part of the belt (12) is connected to an inner telescopic sleeve (20); the belt (12) is driven to move by manually stretching the inner telescopic sleeve (20); and the outer telescopic sleeve (10) is driven to move by the movement of the belt (12).

4. The rotatable sample telescopic test stand according to claim 3, characterized in that: The driving device also includes a power source, which is connected to the pulley (11). The power source drives the pulley (11) and the belt (12) to move, and the movement of the belt (12) drives the outer telescopic sleeve (10) and the inner telescopic sleeve (20) to move in opposite directions.

5. The rotatable sample telescopic test stand according to claim 3, characterized in that: A telescopic rod buckle (14) is provided on one end of the middle supporting sleeve (13) close to the supporting platform (21), and a transverse positioning hole (23) is provided on one end of the corresponding inner telescopic sleeve (20) close to the supporting platform (21); the telescopic rod buckle (14) is snapped into the transverse positioning hole (23) to position the inner telescopic sleeve (20) and the middle supporting sleeve (13).

6. The rotatable sample telescopic test stand according to claim 1, characterized in that: The longitudinal telescopic device (2) comprises an external fixed bracket, an internal movable bracket and a positioning structure; The external fixing bracket is placed vertically, and a plurality of longitudinal positioning holes (18) are arranged on the external fixing bracket; The internal movable bracket is sleeved inside the external fixed bracket, and the internal movable bracket can move up and down along the inner wall of the external fixed bracket, so as to adjust the height of the rotatable sample telescopic experimental frame; The positioning structure is arranged in the internal movable bracket, and the positioning structure can be snapped onto the longitudinal positioning hole (18), thereby locking the external fixed bracket and the internal movable bracket.

7. The rotatable sample telescopic test stand according to claim 6, characterized in that: The positioning structure comprises a connecting rod (8), a rocker (7), a rotating shaft (6) and a pin (5); The connecting rod (8) is arranged inside the internal movable bracket, the lower end of the connecting rod (8) is hinged to one end of the rocker (7), and the other end of the rocker (7) is provided with a pin (5); a rotating shaft (6) is provided in the middle of the rocker (7), and the rotating shaft (6) is fixed on the internal movable bracket; the rocker (7) is driven to rotate and then the pin (5) is driven to move by controlling the connecting rod (8) to move up and down, and a plurality of longitudinal positioning holes (18) are provided on the external fixed bracket, and the pin (5) is selectively inserted into one of the longitudinal positioning holes (18).

8. The rotatable sample telescopic test stand according to claim 1, characterized in that: The gear rotating device (3) comprises a motor (16), a first bevel gear (15), a second bevel gear (26), an upright transmission shaft (19) and a shaft sleeve (25); The motor (16) is fixed on the supporting platform (21); The shaft sleeve (25) vertically penetrates the support platform (21) and is fixedly connected to the support platform (21); a square hole (22) for placing an external electrode (4) is radially opened at the lower part of the shaft sleeve (25); The transmission shaft (19) is sleeved in the shaft sleeve (25) and is rotatably connected to the shaft sleeve (25); a sample hanging hole (17) for hanging a sample is provided at the lower end of the transmission shaft (19); The first bevel gear (15) is connected to the output end of the motor (16), and the second bevel gear (26) is connected to the top end of the transmission shaft (19); the first bevel gear (15) and the second bevel gear (26) are meshed with each other to transmit power; the motor (16) drives the first bevel gear (15), and the first bevel gear (15) then drives the transmission shaft (19) to rotate, so as to realize the rotation of the sample.

9. The rotatable sample telescopic test stand according to claim 8, characterized in that: A contact groove (24) is provided at one end of the external electrode (4); the contact groove (24) is a semicircular notch structure; the external electrode (4) is inserted into the square hole (22) at the bottom of the shaft sleeve (25) so that the contact groove (24) contacts the transmission shaft (19) to realize the electrification of the sample.

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