Test fixture for three-wire test probe

Abstract

The invention relates to a test fixture for a three-wire test probe, which relates to the field of motor detection, and comprises three banana joints and a shell, three mounting columns are uniformly distributed in the shell along the length direction of the shell, the mounting column in the middle is fixed with the shell, and the mounting columns on two sides of the shell slide along the length direction of the shell. An adjusting assembly for driving the mounting columns on the two sides of the shell to move is further arranged in the shell; the two ends of each installation column penetrate through the long side edge of the shell, one end of each installation column is provided with a connecting assembly connected with a banana connector, and the other end of each installation column is electrically connected with a motor fault detector. The ship motor testing device has the effect of reducing manpower consumed when the ship motor is tested.

Description

Technical Field

[0001] This application relates to the field of motor detection, and particularly to a test fixture for a three-wire test probe. Background Art

[0002] When a marine motor fails, a motor fault detector needs to be used for testing. The detection of marine motors is usually carried out in a distribution box. Common detection methods for marine motors include two-wire testing and three-wire testing. Compared with two-wire testing, three-wire testing has the advantages that the position of the test clip does not need to be changed during the test, and the test can be completed with one key, and the test efficiency of three-wire testing is higher; when testing a marine motor, usually an alligator clip is clamped on each of the three terminal posts of the marine motor.

[0003] When a protective cover is provided on the outer cover of the marine motor or the diameter of the terminal post of the marine motor is large, the use of alligator clips is restricted, and the alligator clips are easily detached from the terminal posts of the marine motor. At this time, banana connectors are generally used for testing. During the test, an operator needs to hold three banana connectors with both hands and press them against the corresponding terminal posts of the marine motor respectively, and another operator operates the motor fault detector for testing.

[0004] When testing a marine motor, at least two operators are required to cooperate to complete the test, resulting in a large amount of manpower consumption when testing marine motors. Summary of the Invention

[0005] In order to reduce the manpower consumption when testing marine motors, this application provides a test fixture for a three-wire test probe.

[0006] This application provides a test fixture for a three-wire test probe, which adopts the following technical solutions: A test fixture for a three-wire test probe, including three banana connectors, including a housing. Three mounting posts are evenly distributed in the housing along the length direction of the housing. The mounting post in the middle is fixed to the housing, and the mounting posts on both sides of the housing slide along the length direction of the housing. An adjusting component for driving the mounting posts on both sides of the housing to move is further provided in the housing; Both ends of each mounting post penetrate through the long side of the housing. One end of the mounting post is provided with a connecting component for connecting a banana connector, and the other end of the mounting post is electrically connected to a motor fault detector.

[0007] By adopting the above technical solution, when testing a marine motor, first connect a banana plug to each mounting post through a connecting component, and then control the adjusting component to work. The adjusting component adjusts the distance between the three mounting posts until the distance between the three mounting posts is the same as the distance between the three terminal posts of the marine motor. Finally, an operator holds the housing with one hand so that each banana plug abuts against the corresponding terminal post of the marine motor, and the operator manipulates the motor fault detector with the other hand. One operator can test the marine motor, reducing the manpower consumed when testing the marine motor.

[0008] Optionally, the connecting component includes a connecting hole formed in one end face of the mounting post. The connecting hole is a threaded hole. One end of the banana plug is connected with a connecting rod adapted to the connecting hole, and a thread adapted to the connecting hole is provided on the side wall of the connecting rod.

[0009] By adopting the above technical solution, when replacing the banana plug, the operator rotates each banana plug and the connecting rod respectively until the connecting rod disengages from the connecting hole, then takes the required banana plug, and rotates each banana plug and the connecting rod respectively until the connecting rod is in threaded fit with the connecting hole.

[0010] Optionally, the adjusting component includes a shaft rod rotatably connected to the upper surface of the housing. The shaft rod is aligned with the mounting post in the middle of the housing. The lower end of the shaft rod is located in the housing, and a gear coaxial with the shaft rod is connected to the lower end of the shaft rod. Rack gears meshing with the gear are connected to the mounting posts on both sides of the housing.

[0011] By adopting the above technical solution, when it is necessary to adjust the distance between the three mounting posts, rotate the shaft rod. The shaft rod drives the gear to move. The gear meshes with the rack gear, thereby driving the rack gear to move along the length direction of the housing. The movement of the rack gear drives the corresponding mounting post to move, so that the distance between the three mounting posts can be changed. By changing the rotation direction of the shaft rod, the movement direction of the rack gear can be changed.

[0012] Optionally, a partition is fixedly connected in the housing. The partition is located on the side of the housing close to the banana plug. The mounting post penetrates through the partition. The mounting posts on both sides of the housing are both slidably matched with the partition. Guide blocks are fixedly connected to the mounting posts on both sides of the housing. The guide blocks are located on the side of the partition away from the banana plug. The guide blocks are in contact with the corresponding side wall of the housing and the partition.

[0013] By adopting the above technical solution, when the rack gear drives the mounting post to move along the length direction of the housing, the guide blocks cooperate with the partition and the corresponding side wall of the housing, which can guide the mounting post and reduce the occurrence of deflection of the mounting post during movement.

[0014] Optionally, a mating plate is fixedly connected to the position of the mounting post in the housing. A limiting spring is provided between the mating plate and the guiding block. Two ends of the limiting spring are respectively fixed to the mating plate and the guiding block. The limiting spring presses the mating plate against the corresponding inner side wall of the housing.

[0015] By adopting the above technical solution, the limiting spring presses the mating plate against the corresponding side wall of the housing. The mating plate cooperates with the limiting spring, reducing the relative movement of the mounting post and the banana joint along the axial direction of the mounting post with respect to the housing, so that the banana joint can better cooperate with the terminal of the marine motor.

[0016] Optionally, the connecting assembly includes a connecting hole formed in one end face of the mounting post. A semi-circular groove is cut at the end of the mounting post where the connecting hole is formed. Two mounting grooves are formed in the hole wall of the connecting hole. A fixing block is slidably inserted into the mounting groove. One end of the banana joint is fixedly connected with a connecting rod adapted to the connecting hole. A fixing groove adapted to the fixing block is formed in the side wall of the connecting rod. The connecting assembly further includes a driving member for driving the fixing block to move into the fixing groove, and a positioning member for limiting the fixing block.

[0017] By adopting the above technical solution, when connecting the banana joint and the mounting post, the connecting rod of the banana joint is inserted into the connecting hole. At the same time, the driving member works to gradually insert the fixing block into the fixing groove. When the connecting rod moves in place, part of the fixing block is inserted into the fixing groove, and part of the fixing block is still inserted into the mounting groove. The fixing block cooperates with the fixing groove and the mounting groove to limit the connecting rod and the mounting post, reducing the relative rotation of the connecting rod and the mounting post along their circumferences. Then the positioning member limits the fixing block, reducing the relative movement of the connecting rod and the mounting post along their lengths. At this time, the connection between the connecting rod and the mounting post is completed, reducing the situation where the operator needs to rotate each connecting rod separately when connecting the banana joint, and shortening the time required for connecting the banana joint and the mounting post.

[0018] Optionally, the driving member includes a driving plate slidably inserted into the connection hole. The driving plate is located on the side of the fixed block close to the bottom of the connection hole. A return spring is provided between the driving plate and the bottom wall of the connection hole. Two ends of the return spring are respectively fixed to the driving plate and the bottom wall of the connection hole. A cavity is provided in the mounting post, and the cavity communicates with the mounting groove. A driving rod extending into the cavity is connected to the fixed block. A hinge rod is hinged to the driving rod. One end of the hinge rod away from the driving rod is hinged to a slider. The slider is slidably connected to the wall of the cavity, and the slider slides along the axial direction of the mounting post. A connection spring fixed to the wall of the cavity is further connected to the slider. The connection spring limits the slider. One end of the hinge rod close to the slider is inclined away from the driving plate. A support rod corresponding to the slider and extending into the cavity is connected to the driving plate. A cross bar connected to the corresponding slider is connected to the support rod.

[0019] By adopting the above technical solution, when the connecting rod is pushed into the connection hole, the connecting rod pushes the driving plate to move towards the bottom of the connection hole. At the same time, the driving plate compresses the return spring. The driving plate drives the support rod, the cross bar, the slider and the hinge rod to move, so that one end of the hinge rod away from the slider rotates towards the direction close to the mounting groove. While the hinge rod rotates, it pushes the driving rod and the fixed block to move, so that the fixed block moves into the fixed groove; when the connecting rod is taken out, the return spring resets and pushes the driving plate, the support rod, the cross bar, the slider and the hinge rod to move. While the hinge rod moves, it rotates. The rotation of the hinge rod drives the driving rod and the fixed block to move towards the initial position. At the same time, the restoration of the deformation of the connection spring also drives the slider to move back to its position. When both the return spring and the connection spring return to the initial state, the fixed block returns to the initial position and the fixed block disengages from the fixed groove. At this time, the connecting rod can be taken out from the connection hole.

[0020] Optionally, a positioning groove is provided on the inner side wall of the semi-circular end of the mounting post. A plugging groove corresponding to the positioning groove is provided on the connecting rod. The plugging groove penetrates through the connecting rod. A positioning block is slidably inserted into the plugging groove. The size of the positioning block gradually decreases from top to bottom.

[0021] By adopting the above technical solution, when the fixed block moves into the fixed groove and the positioning groove is aligned with the plugging groove, the operator presses the positioning block into the positioning groove, so that the positioning block is inserted into the positioning groove. The positioning block cooperates with the positioning groove to limit the connecting rod and the mounting post, so as to limit the driving plate and the fixed block; when the connecting rod needs to be taken out, the positioning block is pulled upwards until the positioning block disengages from the positioning groove. At this time, the limitation on the connecting rod and the fixed block can be released.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: By providing banana connectors, a housing, mounting posts, an adjustment assembly, and a connection assembly, the labor cost for testing marine motors is reduced. By providing a shaft rod, gears, and a rack, the distance between three mounting posts can be adjusted. By providing connection holes, mounting grooves, fixing blocks, connecting rods, fixing grooves, driving members, and positioning members, the time required to connect the banana connectors to the mounting posts is shortened. Description of the Drawings

[0023] Figure 1 Fig. is a schematic diagram showing the overall structure of the test fixture in Embodiment 1 of the present application.

[0024] Figure 2 Fig. is a cross-sectional view showing the overall structure of the test fixture in Embodiment 1 of the present application.

[0025] Figure 3 Fig. is a schematic diagram showing the overall structure of the test fixture in Embodiment 2 of the present application.

[0026] Figure 4 Fig. is a cross-sectional view showing the structure of the connection assembly in Embodiment 2 of the present application.

[0027] Description of the Reference Numerals: 1. Housing; 11. Handle; 12. Slot; 2. Mounting Post; 21. Fitting Plate; 22. Mounting Groove; 23. Cavity; 24. Slide Groove; 3. Connection Assembly; 31. Connection Hole; 32. Connecting Rod; 321. Fixing Groove; 33. Fixing Block; 34. Driving Member; 341. Driving Plate; 342. Return Spring; 343. Support Rod; 344. Cross Bar; 345. Hinge Rod; 346. Slide Block; 347. Driving Rod; 348. Connection Spring; 35. Positioning Member; 351. Positioning Groove; 352. Insertion Slot; 353. Positioning Block; 4. Banana Connector; 5. Partition; 6. Guide Block; 7. Limiting Spring; 8. Adjustment Assembly; 81. Shaft Rod; 82. Handwheel; 83. Gear; 84. Rack. Embodiment

[0028] The following is a further detailed description of the present application in conjunction with the attached Figures 1-4 drawings.

[0029] The embodiment of the present application discloses a test fixture for a three-wire test probe. Embodiment

[0030] Refer to Figure 1 And Figure 2, the test fixture includes a housing 1. A handle 11 is vertically and fixedly connected to the lower surface of the housing 1. The test fixture further includes three mounting posts 2. The length directions of the three mounting posts 2 are arranged along the width direction of the housing 1. Each mounting post 2 penetrates through the two long side walls of the housing 1. The middle mounting post 2 is located in the middle of the housing 1 and is fixedly connected to the housing 1. The two side mounting posts 2 are slidably inserted into the housing 1 and slide along the length direction of the housing 1.

[0031] Strip-shaped holes 12 adapted to the sliding mounting posts 2 are provided on both long side walls of the housing 1. Each sliding mounting post 2 is slidably inserted into the corresponding strip-shaped hole 12. One end of the mounting post 2 is a wire connection end, and the other end of the mounting post 2 is provided with a connection assembly 3 for connecting a banana plug 4. The connection assembly 3 includes a connection hole 31 opened on the end face of the mounting post 2. The connection hole 31 is a threaded hole. One end face of the banana plug 4 is fixedly connected with a connecting rod 32 adapted to the threaded hole. Threads adapted to the connection hole 31 are provided on the side wall of the connecting rod 32. The connecting rod 32 is threadedly connected in the connection hole 31.

[0032] A partition 5 is fixedly connected in the housing 1. The partition 5 is located on the side of the housing 1 close to the banana plug 4. The length direction of the partition 5 is the same as the length direction of the housing 1. Strip-shaped holes 12 adapted to the two sliding mounting posts 2 are also provided on the partition 5. The sliding mounting posts 2 all penetrate through the partition 5. Guide blocks 6 are fixedly connected to the sliding mounting posts 2. The guide blocks 6 are located on the side of the partition 5 away from the banana plug 4. One side wall of the guide block 6 contacts the partition 5, and the other side wall of the guide block 6 contacts the inner side wall of the long side of the housing 1 away from the banana plug 4. The partition 5 and the long side wall of the housing 1 away from the banana plug 4 cooperate to limit the guide block 6, so that the guide block 6 can drive the sliding mounting post 2 to slide along the length direction of the housing 1.

[0033] A mating plate 21 is fixedly connected to each mounting post 2. The mating plate 21 is located on the side of the partition 5 close to the banana plug 4. Limit springs 7 are fixedly connected to the side walls of the mating plate 21 away from the banana plug 4. Each limit spring 7 is sleeved on the corresponding mounting post 2. The middle limit spring 7 is fixed to the partition 5, and the two side limit springs 7 are both fixed to the corresponding guide blocks 6. The limit springs 7 are always in a compressed state. The limit springs 7 make the mating plate 21 always press tightly against the side wall of the housing 1 close to the banana plug 4, reducing the relative movement of the mounting post 2 and the housing 1 in the width direction of the housing 1, so that when the operator contacts the banana plug 4 with the terminal of the motor, the banana plug 4 can maintain contact with the terminal of the motor.

[0034] The housing 1 is also provided with an adjusting component 8 for driving the mounting columns 2 on both sides to move. The adjusting component 8 includes a shaft rod 81 rotatably connected to the upper surface of the housing 1. The axial direction of the shaft rod 81 is arranged along the height direction of the housing 1. The upper end of the shaft rod 81 is connected with a handwheel 82. The lower end of the shaft rod 81 is located in the housing 1. A gear 83 is fixedly connected to the lower end surface of the shaft rod 81. The upper surface of each guide block 6 is fixedly connected with a rack 84 by bolts. Each rack 84 meshes with the gear 83.

[0035] Each mounting column 2 is electrically connected to the motor fault detector through a wire. When testing a marine motor, the operator holds the handle 11 and adjusts the position of the banana connector 4 according to the distance between the three terminal posts of the marine motor. When adjusting the position of the banana connector 4, the operator rotates the handwheel 82. The handwheel 82 drives the shaft rod 81 and the gear 83 to rotate. At the same time, the gear 83 meshes with the rack 84, so that the rack 84 drives the guide block 6, the corresponding mounting column 2 and the banana connector 4 to move along the length direction of the housing 1, changing the distance between the three banana connectors 4 until the distance between the three banana connectors 4 is the same as the distance between the three terminal posts of the marine motor.

[0036] After adjusting the banana connector 4, the operator holds the handle 11 with one hand and presses the end of the banana connector 4 against the corresponding terminal post of the marine motor, and operates the motor fault detector with the other hand. Thus, one operator can test the marine motor, reducing the manpower consumed when testing the marine motor. Through the cooperation of the gear 83 and the rack 84, the distance between the three banana connectors 4 can be adjusted, so that marine motors of different models can be tested.

[0037] When banana connectors 4 with different diameters are needed, rotate each banana connector 4 respectively until the connecting rod 32 of each banana connector 4 disengages from the connection hole 31. Then select the banana connector 4 with the required diameter and rotate the connecting rod 32 on each banana connector 4 respectively until each connecting rod 32 is screwed into the corresponding connection hole 31, thus completing the replacement of the banana connector 4.

[0038] The implementation principle of Embodiment 1 of this application is: The operator rotates the handwheel 82. The handwheel 82 drives the shaft rod 81 and the gear 83 to rotate, so that the rack 84 drives the corresponding guide block 6, the mounting rod and the banana connector 4 to move, thereby adjusting the distance between the three banana connectors 4. Then abut each banana connector 4 against the corresponding terminal of the marine motor, and finally operate the motor fault detector to test the marine motor. Embodiment

[0039] Refer to Figure 3 And Figure 4, in order to facilitate the replacement of the banana connector 4, in this embodiment, the connection component 3 includes a connection hole 31 formed on the end face of the mounting post 2, and a connecting rod 32 formed on the end face of the banana connector 4 and adapted to the connection hole 31. Two mounting grooves 22 are formed on the hole wall of the connection hole 31. A fixing block 33 is slidably inserted into the mounting groove 22. Fixing grooves 321 corresponding to the fixing blocks 33 one by one are formed on the connecting rod 32. The length direction of the fixing groove 321 is arranged along the length direction of the connecting rod 32; A cavity 23 is further provided in the connecting rod 32, and the mounting groove 22 communicates with the cavity 23.

[0040] The connection component 3 further includes a driving member 34, and the driving member 34 drives the fixing block 33 to move into the fixing groove 321; The driving member 34 includes a driving plate 341 slidably inserted into the connection hole 31. The driving plate 341 is located on the side of the fixing block 33 close to the bottom wall of the connection hole 31; A return spring 342 is provided between the driving plate 341 and the bottom wall of the connection hole 31. One end of the return spring 342 is fixedly connected to the driving plate 341, and the other end of the return spring 342 is fixedly connected to the bottom wall of the connection hole 31. The return spring 342 limits the driving plate 341.

[0041] A support rod 343 is fixedly connected to the side wall of the driving plate 341. The support rod 343 penetrates the hole wall of the connection hole 31, and one end of the support rod 343 extends into it. The support rod 343 is slidably inserted into the hole wall of the connection hole 31, and the support rod 343 slides along the length direction of the mounting post 2; One end of the support rod 343 located in the cavity 23 is fixedly connected to a cross bar 344, and the cross bar 344 is located between the support rod 343 and the fixing block 33.

[0042] One end of the cross bar 344 away from the support rod 343 is fixedly connected to a slider 346. A sliding groove 24 adapted to the slider 346 is formed on the wall of the cavity 23. The length direction of the sliding groove 24 is arranged along the axial direction of the mounting post 2. Each slider 346 is slidably inserted into the corresponding sliding groove 24. One end of the slider 346 close to the banana connector 4 is fixedly connected to a connection spring 348, and the other end of the connection spring 348 away from the slider 346 is fixedly connected to the groove wall at the corresponding end of the sliding groove 24.

[0043] In the initial state, the connection spring 348 limits the slider 346, so that the slider 346 is located on the side of the fixing block 33 close to the banana connector 4; One side of the slider 346 close to the fixing block 33 is hinged with a hinge rod 345. One end of the hinge rod 345 away from the slider 346 is hinged with a driving rod 347. One end of the driving rod 347 away from the hinge rod 345 is fixed to the corresponding fixing block 33. In the initial state, the hinge rod 345 is inclined in the direction away from the driving rod 347 and towards the banana connector 4.

[0044] The connecting component 3 further includes a positioning member 35 for limiting the driving plate 341. The end of the mounting post 2 where the connecting hole 31 is opened is cut into a semi-circular shape. The positioning member 35 includes a positioning groove 351 opened on the inner side wall of the semi-circular mounting post 2. A plugging groove 352 adapted to the positioning groove 351 is opened on the side wall of the connecting rod 32. The plugging groove 352 penetrates through the connecting rod 32. A positioning block 353 is slidably plugged in the plugging groove 352. The length direction of the positioning block 353 is arranged along the radial direction of the connecting rod 32. The length of the positioning block 353 gradually decreases from top to bottom, and the width of the positioning block 353 also gradually decreases from top to bottom. The positioning block 353 is in interference fit with the plugging groove 352.

[0045] When connecting the banana joint 4 and the mounting post 2, the operator makes the side of the connecting rod 32 connected to the positioning block 353 face upward, and then inserts the connecting rod 32 into the connecting hole 31. When the connecting rod 32 contacts the driving plate 341, as the connecting rod 32 continues to move, the connecting rod 32 pushes the driving plate 341 to move, and at the same time, the driving plate 341 compresses the return spring 342. The movement of the driving plate 341 drives the movement of the support rod 343, the cross bar 344 and the slider 346. The movement of the slider 346 stretches the connecting spring 348. At the same time, the movement of the slider 346 drives the rotation of the articulated rod 345. The articulated rod 345 rotates and pushes the driving rod 347 to move into the mounting groove 22, thereby pushing the fixing block 33 to move into the fixing groove 321.

[0046] When the fixing groove 321 is aligned with the mounting groove 22, as the connecting rod 32 continues to push the driving plate 341 to move, the fixing block 33 continues to move out of the mounting groove 22, so that the fixing block 33 is gradually plugged into the fixing groove 321, and the fixing block 33 slides along the fixing groove 321, and part of the fixing block 33 is still located in the mounting groove 22. The cooperation between the fixing block 33 and the fixing groove 321 limits the connecting rod 32 and the mounting post 2, reducing the relative rotation of the connecting rod 32 and the mounting post 2 along their circumferences.

[0047] When the plugging groove 352 is aligned with the positioning groove 351, press the positioning block 353 downward until part of the positioning block 353 is plugged in the positioning groove 351. The positioning block 353 is in interference fit with the plugging groove 352. The cooperation between the positioning block 353 and the positioning groove 351 limits the connecting rod 32 and the mounting post 2, so as to be able to limit the driving plate 341 and the fixing block 33, and keep the positioning block 353 plugged in the positioning groove 351. The cooperation between the positioning block 353 and the positioning groove 351 limits the connecting rod 32 and the mounting post 2, reducing the relative movement of the connecting rod 32 and the mounting post 2 along their length directions. Thus, the connection between the banana joint 4 and the mounting post 2 is completed.

[0048] When it is necessary to remove the banana connector 4, pull the positioning block 353 outwards of the insertion slot 352 until the positioning block 353 disengages from the positioning slot 351. At this time, the return spring 342 resumes deformation and pushes the driving plate 341 and the connecting rod 32 to move outwards of the connecting hole 31; the driving plate 341 drives the support rod 343, the cross bar 344, the slider 346 and the hinge rod 345 to move, and the hinge rod 345 drives the driving rod 347 and the fixing block 33 to move to the initial position. At the same time, the connecting spring 348 resumes deformation, which can better drive the slider 346 to reset.

[0049] When the return spring 342 resumes to the initial state, the connecting spring 348 also resumes to the initial state. The driving plate 341, the support rod 343, the cross bar 344, the hinge rod 345, the driving rod 347 and the fixing block 33 all return to their positions. Finally, the operator pulls out the connecting rod 32 from the connecting hole 31, thereby removing the banana connector 4. When replacing the banana connector 4, there is no need to rotate the banana connector 4, and the banana connector 4 can be replaced more quickly.

[0050] The implementation principle of Embodiment 2 of this application is: when replacing the banana connector 4, remove the positioning block 353, and then pull out the connecting rod 32 from the connecting hole 31; take the required banana connector 4, and insert the connecting rod 32 into the connecting hole 31 until the fixing block 33 is inserted into the fixing slot 321. Finally, push the positioning block 353 into the positioning slot 351 until the positioning block 353 is inserted into the positioning slot 351.

[0051] The above are all the preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A test fixture for a three-wire test probe, comprising three banana connectors (4), characterized in that: It includes a housing (1), in which three mounting posts (2) are evenly distributed along the length direction of the housing (1). The mounting post (2) in the middle is fixed to the housing (1), and the mounting posts (2) on both sides of the housing (1) slide along the length direction of the housing (1). An adjusting component (8) for driving the movement of the mounting posts (2) on both sides of the housing (1) is also provided in the housing (1). Both ends of each mounting post (2) penetrate through the long side of the housing (1). One end of the mounting post (2) is provided with a connecting component (3) for connecting a banana plug (4), and the other end of the mounting post (2) is electrically connected to a motor fault detector.

2. The test fixture for a three-wire test probe according to claim 1, wherein: The connecting component (3) includes a connecting hole (31) opened on one end face of the mounting post (2). The connecting hole (31) is a threaded hole. One end of the banana plug (4) is connected with a connecting rod (32) adapted to the connecting hole (31), and threads adapted to the connecting hole (31) are provided on the side wall of the connecting rod (32).

3. The test fixture for a three-wire test probe according to claim 1, characterized in that: The adjusting component (8) includes a shaft rod (81) rotatably connected to the upper surface of the housing (1). The shaft rod (81) is aligned with the mounting post (2) in the middle of the housing (1). The lower end of the shaft rod (81) is located in the housing (1), and a gear (83) coaxial with the shaft rod (81) is connected to the lower end of the shaft rod (81). Rack bars (84) meshing with the gear (83) are connected to the mounting posts (2) on both sides of the housing (1).

4. The test fixture for a three-wire test probe according to claim 3, characterized in that: A partition plate (5) is fixedly connected in the housing (1). The partition plate (5) is located on the side of the housing (1) close to the banana plug (4). The mounting post (2) penetrates through the partition plate (5). The mounting posts (2) on both sides of the housing (1) are both in sliding fit with the partition plate (5). Guide blocks (6) are fixedly connected to the mounting posts (2) on both sides of the housing (1). The guide blocks (6) are located on the side of the partition plate (5) away from the banana plug (4), and the guide blocks (6) are in contact with the corresponding side walls of the housing (1) and the partition plate (5).

5. The test fixture for a three-wire test probe according to claim 4, characterized in that: A mating plate (21) is fixedly connected to the position of the mounting post (2) in the housing (1). A limiting spring (7) is provided between the mating plate (21) and the guide block (6). Both ends of the limiting spring (7) are respectively fixed to the mating plate (21) and the guide block (6). The limiting spring (7) presses the mating plate (21) against the corresponding inner wall of the housing (1).

6. The test fixture for a three-wire test probe according to claim 1, wherein: The connecting component (3) includes a connecting hole (31) opened on one end face of the mounting post (2). A semi-circular groove is cut at the end of the mounting post (2) where the connecting hole (31) is opened. Two mounting grooves (22) are provided on the hole wall of the connecting hole (31). Fixing blocks (33) are slidably inserted into the mounting grooves (22). One end of the banana plug (4) is fixedly connected with a connecting rod (32) adapted to the connecting hole (31), and fixing grooves (321) adapted to the fixing blocks (33) are provided on the side wall of the connecting rod (32). The connecting component (3) further includes a driving member (34) for driving the fixing block (33) to move into the fixing groove (321), and a positioning member (35) for limiting the fixing block (33).

7. The test fixture for a three-wire test probe according to claim 6, characterized in that: The driving member (34) includes a driving plate (341) slidably inserted into the connecting hole (31). The driving plate (341) is located on the side of the fixing block (33) close to the bottom of the connecting hole (31). A return spring (342) is provided between the driving plate (341) and the bottom wall of the connecting hole (31). Two ends of the return spring (342) are respectively fixed to the driving plate (341) and the bottom wall of the connecting hole (31). A cavity (23) is provided in the mounting post (2). The cavity (23) communicates with the mounting groove (22). A driving rod (347) extending into the cavity (23) is connected to the fixing block (33). A hinge rod (345) is hinged to the driving rod (347). One end of the hinge rod (345) far from the driving rod (347) is hinged to a slider (346). The slider (346) is slidably connected to the wall of the cavity (23), and the slider (346) slides along the axial direction of the mounting post (2). A connecting spring (348) fixed to the wall of the cavity (23) is further connected to the slider (346). The connecting spring (348) limits the slider (346). One end of the hinge rod (345) close to the slider (346) inclines away from the driving plate (341). A support rod (343) corresponding to the slider (346) and extending into the cavity (23) is connected to the driving plate (341). A cross bar (344) connected to the corresponding slider (346) is connected to the support rod (343).

8. The test fixture for a three-wire test probe according to claim 6 or 7, characterized in that: A positioning groove (351) is formed in the inner side wall of one semi-circular end of the mounting post (2). A plugging groove (352) corresponding to the positioning groove (351) is formed in the connecting rod (32). The plugging groove (352) penetrates through the connecting rod (32). A positioning block (353) is slidably inserted into the plugging groove (352). The size of the positioning block (353) gradually decreases from top to bottom.

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