A stator core tensioning screw pretightening force testing device

Abstract

The utility model provides a kind of stator core tensioning screw pre-tightening force test device, it is related to pre-tightening force test technical field, including steel sheet, the inner wall of steel sheet is sleeved with screw body, one end of screw body is sleeved with nut, the outer surface of screw body is sleeved with detection ring, the one side of knob is fixedly connected with screw rod, one end of screw rod is fixedly connected with bearing, the outer surface of screw rod is sleeved with moving plate, the one side of moving plate is equipped with runner, the outer surface of runner is fixedly connected with rotating lever, one end of rotating lever is fixedly connected with first gear wheel.The utility model, by the rotation of knob drives screw rod to rotate in the inside of bearing, then by rotating runner drives rotating lever to rotate, by rotating lever rotation drives first gear wheel to rotate, drives second gear wheel to rotate when first gear wheel rotates, and second gear wheel is sleeved on nut, to drive nut along screw body to rotate.

Description

Technical Field

[0001] This utility model relates to the field of preload testing technology, and in particular to a preload testing device for stator core tension screws. Background Technology

[0002] With the widespread application of large electric motors, generators, and other power equipment, the assembly quality of the stator core directly affects the operational reliability and service life of the equipment. As a key component in the press-fitting of the stator core, the precise control of its preload is crucial.

[0003] Existing testing equipment requires operators to manually tighten the nut until it fits against the test ring, and then estimate the preload by indirectly measuring the torque or pressure using a torque wrench or hydraulic loading device. However, this method of manually fitting the nut to the test ring to conduct the preload test may result in inaccurate test results, and if the fit is too tight, the operator may not be able to turn it, thus affecting the normal progress of the testing work. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing testing devices, which require manual tightening of the nut to fit against the test ring, followed by estimation of preload by indirectly measuring torque or pressure using a torque wrench or hydraulic loading device. However, this manual tightening method may result in inaccurate test results, and excessive tightening may prevent the operator from turning the nut, thus affecting the testing process. This invention provides a stator core tension screw preload testing device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a stator core tension screw preload testing device, comprising a steel plate, a screw body sleeved on the inner wall of the steel plate, a nut sleeved on one end of the screw body, a detection ring sleeved on the outer surface of the screw body, a fixed frame fixedly connected to the outer surface of the steel plate, a knob provided on the outer surface of the fixed frame, a lead screw fixedly connected to one side of the knob, a bearing fixedly connected to one end of the lead screw, a movable plate sleeved on the outer surface of the lead screw, a rotating wheel provided on one side of the movable plate, a rotating rod fixedly connected to the outer surface of the rotating wheel, a first gear fixedly connected to one end of the rotating rod, the first gear meshing with a second gear, and a movable plate provided on the outer surface of the movable plate.

[0006] In a preferred embodiment, a sliding rod is fixedly connected to the outer surface of the movable plate, a locking block is fixedly connected to the outer surface of the movable plate, a locking groove is fixedly connected to one side of the movable plate, a pull rod is sleeved on the inner wall of the locking groove, a blocking block is fixedly connected to one end of the pull rod, and a spring is sleeved on the outer surface of the pull rod.

[0007] In a preferred embodiment, one end of the spring is fixedly connected to one side of the blocking block, the other end of the spring is fixedly connected to the inner wall of the slot, the outer surface of the pull rod is slidably connected to the inner wall of the slot, the outer surface of the blocking block is slidably connected to the inner wall of the slot, and the outer surface of the slide rod is slidably connected to the inner wall of the movable plate.

[0008] In a preferred embodiment, the inner wall of the second gear has a through hole adapted to the nut, and the inner wall of the through hole is engaged with the outer surface of the nut.

[0009] In a preferred embodiment, the outer surface of the movable plate is provided with a threaded hole that matches the lead screw, and the inner wall of the threaded hole is threaded to the outer surface of the lead screw.

[0010] In a preferred embodiment, the bearing is placed inside the steel plate, and the outer surface of the bearing is fixedly connected to the inner wall of the steel plate.

[0011] In a preferred embodiment, one end of the lead screw passes through the inner wall of the fixing frame and is fixedly connected to one side of the knob.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows: This invention provides a good working environment for other components using a steel plate, ensures the normal operation of the testing process through the screw body, and compresses the test ring through the nut to perform the preload test. A fixed bracket limits the screw, and the rotation of a knob drives the screw to rotate inside the bearing. Since the screw is threadedly connected to the moving plate, the rotating plate moves simultaneously with the screw's rotation. Then, a rotating wheel drives a rotating rod to rotate, which in turn drives the first gear to rotate. Because the first gear meshes with the second gear, the rotation of the first gear drives the rotation of the second gear, which is fitted onto the nut, causing the nut to rotate along the screw body and move. This movement of the nut compresses the test ring, completing the preload test. Attached Figure Description

[0013] Figure 1 A perspective view of a stator core tension screw preload testing device provided by this utility model.

[0014] Figure 2 A cross-sectional view of a steel plate for testing the preload of a stator core tension screw, provided by this utility model.

[0015] Figure 3 A cross-sectional view of the moving plate of a stator core tension screw preload testing device provided by this utility model.

[0016] Figure 4 An exploded view of a stator core tension screw preload testing device provided by this utility model.

[0017] Figure 5 A cross-sectional view of the slot of a stator core tension screw preload testing device provided by this utility model.

[0018] Legend: 1. Steel plate; 2. Screw body; 3. Nut; 4. Detection ring; 5. Fixing frame; 6. Knob; 7. Lead screw; 8. Bearing; 9. Moving plate; 10. Movable plate; 11. Rotating wheel; 12. Rotating rod; 13. First gear; 14. Second gear; 15. Slide rod; 16. Locking block; 17. Locking groove; 18. Pull rod; 19. Spring; 20. Blocking block. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1 like Figures 1-4 As shown, this utility model provides a technical solution: a stator core tension screw preload testing device, including a steel plate 1, a screw body 2 sleeved on the inner wall of the steel plate 1, a nut 3 sleeved on one end of the screw body 2, a detection ring 4 sleeved on the outer surface of the screw body 2, a fixing frame 5 fixedly connected to the outer surface of the steel plate 1, a knob 6 provided on the outer surface of the fixing frame 5, a lead screw 7 fixedly connected to one side of the knob 6, a bearing 8 fixedly connected to one end of the lead screw 7, a movable plate 9 sleeved on the outer surface of the lead screw 7, a rotating wheel 11 provided on one side of the movable plate 9, a rotating rod 12 fixedly connected to the outer surface of the rotating wheel 11, a first gear 13 fixedly connected to one end of the rotating rod 12, the first gear 13 meshing with a second gear 14, and a movable plate 10 provided on the outer surface of the movable plate 9.

[0021] In this embodiment, the steel plate 1 provides a good working environment for other components, the screw body 2 ensures the normal operation of the testing work, the nut 3 compresses the test ring 4 to perform the preload test, the fixing frame 5 limits the lead screw 7, and the rotation of the knob 6 drives the lead screw 7 to rotate inside the bearing 8. Since the lead screw 7 is threadedly connected to the moving plate 9, the rotation of the lead screw 7 drives the moving plate 9 to move. Then, the rotating wheel 11 drives the rotating rod 12 to rotate, and the rotation of the rotating rod 12 drives the first gear 13 to rotate. Since the first gear 13 is meshed with the second gear 14, the rotation of the first gear 13 drives the second gear 14 to rotate. The second gear 14 is sleeved on the nut 3, thereby driving the nut 3 to rotate along the screw body 2 and move. The movement of the nut 3 compresses the test ring 4 to complete the preload test.

[0022] Example 2 like Figures 1-5 As shown, a slide rod 15 is fixedly connected to the outer surface of the movable plate 9, a locking block 16 is fixedly connected to the outer surface of the movable plate 10, a slot 17 is fixedly connected to one side of the movable plate 9, a pull rod 18 is sleeved on the inner wall of the slot 17, a blocking block 20 is fixedly connected to one end of the pull rod 18, a spring 19 is sleeved on the outer surface of the pull rod 18, one end of the spring 19 is fixedly connected to one side of the blocking block 20, and the other end of the spring 19 is fixedly connected to the inner wall of the slot 17. The outer surface of the pull rod 18 is slidably connected to the inner wall of the slot 17, the outer surface of the blocking block 20 is slidably connected to the inner wall of the slot 17, and the outer surface of the slide rod 15 is slidably connected to the inner wall of the movable plate 10.

[0023] In this embodiment, the movement of the movable plate 9 drives the movable plate 10 to move. The movable plate 10 is slidably connected to the sliding rod 15, ensuring that the movable plate 10 can move normally without falling off. After the second gear 14 and the nut 3 are engaged, the movable plate 10 moves along the sliding rod 15, thereby driving the locking block 16 to move. The locking block 16 will squeeze the blocking block 20, causing the blocking block 20 to move into the slot 17. At the same time, it will drive the pull rod 18 to move, and the spring 19 will also be compressed. When the locking block 16 passes the blocking block 20, the spring 19 will rebound and drive the blocking block 20 to reset, thereby fixing the locking block 16, thus achieving the purpose of fixing the movable plate 10. When it is necessary to move the movable plate 10, the locking block 16 can be released by pulling the pull rod 18.

[0024] Working principle: like Figures 1-5As shown, in this utility model, when it is necessary to perform a preload test on the screw body 2, firstly, the screw body 2 is passed through the steel plate 1, then the nut 3 is fitted onto the top of the screw body 2, and then the second gear 14 is engaged with the nut 3, causing the movable plate 10 to move along the slide rod 15, thereby driving the locking block 16 to move. The locking block 16 will press against the blocking block 20, causing the blocking block 20 to move into the slot 17, while simultaneously driving the pull rod 18 to move, and the spring 19 will also be compressed. After the locking block 16 passes the blocking block 20, the spring 19 will rebound and drive the blocking block 20 to reset, thereby fixing the locking block 16, thus fixing the movable plate 1. The purpose of this mechanism is to rotate the screw 7 inside the bearing 8 by turning the knob 6. Since the screw 7 is threadedly connected to the moving plate 9, the moving plate 9 moves as the screw 7 rotates. Then, the rotating wheel 11 drives the rotating rod 12 to rotate, which in turn drives the first gear 13 to rotate. Since the first gear 13 is meshed with the second gear 14, the second gear 14 rotates as the first gear 13 rotates. The second gear 14 is fitted onto the nut 3, which in turn drives the nut 3 to rotate along the screw body 2, thus moving it. The movement of the nut 3 compresses the detection ring 4, completing the preload detection.

[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A stator core tension screw preload testing device, comprising a steel plate (1), characterized in that: The inner wall of the steel plate (1) is fitted with a screw body (2), one end of the screw body (2) is fitted with a nut (3), the outer surface of the screw body (2) is fitted with a detection ring (4), the outer surface of the steel plate (1) is fixedly connected with a fixing frame (5), the outer surface of the fixing frame (5) is provided with a knob (6), one side of the knob (6) is fixedly connected with a lead screw (7), one end of the lead screw (7) is fixedly connected with a bearing (8), the outer surface of the lead screw (7) is fitted with a moving plate (9), one side of the moving plate (9) is provided with a rotating wheel (11), the outer surface of the rotating wheel (11) is fixedly connected with a rotating rod (12), one end of the rotating rod (12) is fixedly connected with a first gear (13), the first gear (13) meshes with a second gear (14), and the outer surface of the moving plate (9) is provided with a movable plate (10).

2. The stator core tension screw preload testing device according to claim 1, characterized in that: A sliding rod (15) is fixedly connected to the outer surface of the movable plate (9), a locking block (16) is fixedly connected to the outer surface of the movable plate (10), a slot (17) is fixedly connected to one side of the movable plate (9), a pull rod (18) is sleeved on the inner wall of the slot (17), a blocking block (20) is fixedly connected to one end of the pull rod (18), and a spring (19) is sleeved on the outer surface of the pull rod (18).

3. The stator core tension screw preload testing device according to claim 2, characterized in that: One end of the spring (19) is fixedly connected to one side of the blocking block (20), and the other end of the spring (19) is fixedly connected to the inner wall of the slot (17). The outer surface of the pull rod (18) is slidably connected to the inner wall of the slot (17). The outer surface of the blocking block (20) is slidably connected to the inner wall of the slot (17). The outer surface of the slide rod (15) is slidably connected to the inner wall of the movable plate (10).

4. The stator core tension screw preload testing device according to claim 1, characterized in that: The inner wall of the second gear (14) is provided with a through hole that is compatible with the nut (3), and the inner wall of the through hole is engaged with the outer surface of the nut (3).

5. The stator core tension screw preload testing device according to claim 1, characterized in that: The outer surface of the movable plate (9) is provided with a threaded hole that is compatible with the lead screw (7), and the inner wall of the threaded hole is threaded to the outer surface of the lead screw (7).

6. The stator core tension screw preload testing device according to claim 1, characterized in that: The bearing (8) is placed inside the steel plate (1), and the outer surface of the bearing (8) is fixedly connected to the inner wall of the steel plate (1).

7. The stator core tension screw preload testing device according to claim 1, characterized in that: One end of the lead screw (7) passes through the inner wall of the fixing frame (5) and is fixedly connected to one side of the knob (6).

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