Trapezoidal screw rod self-locking force testing device

Abstract

The utility model discloses a trapezoidal screw rod self-locking force testing device, its structure comprises a spacing mechanism, a pressure mechanism and a buffer mechanism, the spacing mechanism is provided with the upper part of a pedestal, the spacing mechanism comprises a guide rod, a slide block and an upper sleeve, the upper end of the guide rod is fixedly connected with a mounting rack, the slide block is slidably connected with the guide rod, and the upper sleeve is connected with the guide rod. A limiting groove is formed in the middle of the sliding block, the upper sleeve is slidably connected with the limiting groove, the pressure applying mechanism is arranged on the lower portion of the mounting frame and comprises a hydraulic cylinder, a connecting frame and a lower sleeve, the lower end of the hydraulic cylinder is fixedly connected with the base, the upper end of the hydraulic cylinder is movably connected with the connecting frame in a contact mode, and the connecting frame is slidably connected with the guide rod. The lower sleeve is rotationally connected with the connecting frame, and a buffering mechanism is arranged below the guide rod. The utility model belongs to the field of screw rod testing devices, and particularly relates to a trapezoidal screw rod self-locking force testing device.

Description

Technical Field

[0001] The utility model belongs to the field of screw rod testing devices, in particular to a trapezoidal screw rod self-locking force testing device. Background Art

[0002] Trapezoidal screw pairs are commonly used transmission mechanical parts, among which self-locking is a unique property of trapezoidal screws. Therefore, trapezoidal screws are often used in axial load transmission. In order to ensure the performance consistency of the trapezoidal screw after leaving the factory, it is usually necessary to conduct a self-locking force test before leaving the factory. The self-locking force refers to the ability of the screw to achieve self-locking under a certain load gravity.

[0003] The existing screw self-locking force testing device requires the use of a large number of active transmission mechanisms for installing the screw and applying pressure to the screw during the test, which incurs high costs during use, and the installation and testing are relatively cumbersome. In addition, excessive pressure during the pressure test can easily cause impact damage to the connector. Utility Model Content

[0004] The technical problems to be solved by the utility model are high use cost and easy impact damage of the connecting parts.

[0005] To solve the above problems, the technical solution adopted by the utility model is as follows: the trapezoidal screw self-locking force testing device proposed by the utility model comprises a base and a screw, a mounting frame is fixedly arranged on the upper part of the base, and also comprises a limiting mechanism, a pressure mechanism and a buffer mechanism, the limiting mechanism is provided with the upper part of the base, the limiting mechanism comprises a guide rod, a slider and an upper sleeve, the upper end of the guide rod is fixedly connected to the mounting frame, the slider is slidably connected to the guide rod, a limiting groove is arranged in the middle of the slider, the upper sleeve is slidably connected to the limiting groove, the pressure mechanism is arranged at the lower part of the mounting frame, the pressure mechanism comprises a hydraulic cylinder, a connecting frame and a lower sleeve, the lower end of the hydraulic cylinder is fixedly connected to the base, the upper end of the hydraulic cylinder is movably contacted and connected to the connecting frame, the connecting frame is slidably connected to the guide rod, the lower sleeve is rotatably connected to the connecting frame, a buffer mechanism is arranged below the guide rod, the buffer mechanism comprises a connecting block, the lower part of the connecting block is fixedly connected to the upper part of the base, a spring and a damping are arranged on the upper part of the connecting block, and a top block is arranged on the upper part of the spring and the damping.

[0006] Furthermore, the limiting mechanism also includes a stopper, a limiting block and a sensor. The stopper is fixedly arranged at an upper position in the middle of the guide rod, and the sliding block is arranged above the stopper.

[0007] Furthermore, a sensor is fixedly provided on the upper part of the upper sleeve, a limit block is fixedly provided on the upper end of the sensor, the limit block is configured as a hexagonal structure, the upper part of the limit groove is configured as a hexagonal groove structure, and the limit block and the limit groove are slidably engaged and connected.

[0008] Furthermore, the upper end of the screw rod is threadedly connected to the upper sleeve, and the lower end of the screw rod is threadedly connected to the lower sleeve.

[0009] Furthermore, the guide rod and the buffer mechanism are provided in two groups, and the two groups of the buffer mechanism are respectively arranged directly below the guide rod, and a gap is left between the top block and the lower end of the guide rod.

[0010] Furthermore, the upper sleeve and the lower sleeve have the same axis, and the inner hole diameters of the upper sleeve and the lower sleeve are the same.

[0011] The beneficial effects achieved by the utility model using the above structure are as follows:

[0012] 1. The trapezoidal screw self-locking force testing device proposed in this scheme sets the slider, the connecting frame and the guide rod to a vertical sliding connection. Under the action of gravity and by applying weights, the self-locking force of the screw can be determined and calculated. The use cost is low and the operation is convenient.

[0013] 2. The trapezoidal screw self-locking force testing device proposed in this scheme has a buffer mechanism arranged directly below the guide rod. When the weight is too heavy and the connecting frame slides and falls, it has a buffering effect on the movement of the connecting frame, thereby avoiding damage caused by the large impact force of the connecting frame falling and increasing its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a first overall structural schematic diagram of the utility model;

[0015] Figure 2 It is a second overall structural schematic diagram of the utility model;

[0016] Figure 3 This is a third overall structural schematic diagram of the utility model.

[0017] Among them, 1. base, 101. mounting frame, 2. limiting mechanism, 201. guide rod, 202. stop block, 203. slider, 204. limiting groove, 205. limiting block, 206. sensor, 207. upper sleeve, 3. pressure mechanism, 301. hydraulic cylinder, 302. connecting frame, 303. lower sleeve, 4. buffer mechanism, 401. connecting block, 402. damping, 403. spring, 404. top block, 5. screw rod.

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] like Figure 1 , Figure 2 and Figure 3 As shown, a trapezoidal screw self-locking force testing device proposed by the utility model includes a base 1 and a screw 5, a mounting frame 101 is fixedly arranged on the upper part of the base 1, and also includes a limiting mechanism 2, a pressure mechanism 3 and a buffer mechanism 4, the limiting mechanism 2 is arranged on the upper part of the base 1, the limiting mechanism 2 includes a guide rod 201, a slider 203 and an upper sleeve 207, the upper end of the guide rod 201 is fixedly connected to the mounting frame 101, the slider 203 is slidably connected to the guide rod 201, a limiting groove 204 is provided in the middle of the slider 203, the upper sleeve 207 is slidably connected to the limiting groove 204, and the pressure mechanism 3 is arranged at the lower part of the mounting frame 101 The pressure mechanism 3 includes a hydraulic cylinder 301, a connecting frame 302 and a lower sleeve 303. The lower end of the hydraulic cylinder 301 is fixedly connected to the base 1, and the upper end of the hydraulic cylinder 301 is movably connected to the connecting frame 302. The connecting frame 302 is slidably connected to the guide rod 201, and the lower sleeve 303 is rotatably connected to the connecting frame 302. A buffer mechanism 4 is provided below the guide rod 201, and the buffer mechanism 4 includes a connecting block 401. The lower part of the connecting block 401 is fixedly connected to the upper part of the base 1, and the upper part of the connecting block 401 is provided with a spring 403 and a damper 402, and the upper parts of the spring 403 and the damper 402 are provided with a top block 404.

[0021] like Figure 1 and Figure 2As shown, the limiting mechanism 2 also includes a stopper 202, a limiter 205 and a sensor 206. The stopper 202 is fixedly arranged at the upper middle position of the guide rod 201. The slider 203 is arranged above the stopper 202 to limit the sliding position of the slider 203. The upper part of the upper sleeve 207 is fixedly provided with a sensor 206. The upper end of the sensor 206 is fixedly provided with a limiter 205. The limiter 205 is set to a hexagonal structure. The upper part of the limiter groove 204 is set to a hexagonal groove structure. The limiter 205 and the limiter The positioning groove 204 is slidably engaged and used to limit the rotation of the upper sleeve 207. The upper end of the screw rod 5 is threadedly connected to the upper sleeve 207, and the lower end of the screw rod 5 is threadedly connected to the lower sleeve 303. There are two groups of guide rods 201 and buffer mechanisms 4. The two groups of buffer mechanisms 4 are respectively arranged directly below the guide rod 201. A gap is left between the top block 404 and the lower end of the guide rod 201. The upper sleeve 207 and the lower sleeve 303 have the same axis, and the inner apertures of the upper sleeve 207 and the lower sleeve 303 are the same.

[0022] When in use, the upper end of the screw rod 5 and the upper sleeve 207 are connected by threaded rotation, the limit block 205 is aligned with the upper hexagonal groove of the limit groove 204 and inserted into the limit groove 204, and the hydraulic cylinder 301 is controlled to extend. Under the push of the hydraulic cylinder 301, the connecting frame 302 begins to move up along the stop block 202 until the lower sleeve 303 and the lower part of the screw rod 5 are threadedly connected. At this time, the hydraulic cylinder 301 is retracted, and weights are added to the left and right sides of the connecting frame 302. Under the action of gravity, By measuring the weight of the weight, the data of the sensor 206 and the movement of the connecting frame 302, the self-locking force of the screw rod 5 can be determined and calculated. The operation is simple. When the weight added is too heavy, the connecting frame 302 falls along the stop block 202 to the top block 404. The spring 403 and the damping 402 can buffer and reduce shock for the connecting frame 302 and the supporting spring 403, thereby preventing the connecting frame 302 and the lower sleeve 303 from being broken and damaged after continuous collision with the base 1 after multiple tests, thereby increasing the service life.

[0023] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A trapezoidal screw self-locking force testing device, comprising a base and a screw, wherein a mounting frame is fixedly arranged on the upper part of the base, and characterized in that: The cam is provided with a plurality of springs, each of which ...

2. A trapezoidal screw self-locking force testing device according to claim 1, characterized in that: The limiting mechanism also includes a stopper, a limiting block and a sensor. The stopper is fixedly arranged at an upper position in the middle of the guide rod, and the sliding block is arranged above the stopper.

3. A trapezoidal screw self-locking force testing device according to claim 2, characterized in that: A sensor is fixedly arranged on the upper part of the upper sleeve, a limit block is fixedly arranged on the upper end of the sensor, the limit block is arranged in a hexagonal structure, the upper part of the limit groove is arranged in a hexagonal groove structure, and the limit block and the limit groove are connected in a sliding manner.

4. A trapezoidal screw self-locking force testing device according to claim 3, characterized in that: The upper end of the screw rod is threadedly connected to the upper sleeve, and the lower end of the screw rod is threadedly connected to the lower sleeve.

5. A trapezoidal screw self-locking force testing device according to claim 4, characterized in that: The guide rods and buffer mechanisms are provided with two groups in total. The two groups of buffer mechanisms are respectively arranged directly below the guide rods, and a gap is left between the top block and the lower end of the guide rod.

6. A trapezoidal screw self-locking force testing device according to claim 5, characterized in that: The upper sleeve and the lower sleeve have the same axial center, and the inner hole diameters of the upper sleeve and the lower sleeve are the same.

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