Disassembly-free device for chassis vibration test and use method thereof

Abstract

The application discloses a disassembly-free vibration testing device applied to a railway dispatching machine box and a use method. The device comprises a bottom plate, a front screw nut, a rear screw nut, a handle, a screw rod stopper, a slide, an upper cover plate, a sliding support, a fixed support and a screw rod, and a rotating shaft. The device to be tested is placed between the fixed support and the sliding support. The handle is rotated to drive the screw rod to rotate. The screw rod converts the rotation into linear motion of the sliding support. The upper cover plate is connected with the fixed support through the rotating shaft. The device to be tested is clamped between the fixed support and the sliding support. The upper cover plate is turned over. The sliding support is fixed through screws. The vibration test can be performed. After the test is completed, the locking screw is opened, the handle is rotated, the distance between the fixed support and the sliding support is increased, and the testing device can be taken out. The device is simple in operation, high in universality, high in reliability, low in cost, meets the requirement of convenient and fast experiment of the machine box device, and improves the test efficiency.

Description

TECHNICAL FIELD

[0001] The application relates to a disassembly-free device, in particular to a disassembly-free device for a case vibration test and a use method. BACKGROUND

[0002] In the current vibration test field, there are many connection and fixing forms of equipment and vibration tables, some of which are directly fixed on the vibration table by screws and pressing plates, some of which need to be customized test fixtures, and there are complex disassembly problems of disassembling one for testing one, the safety of the pressing structure form is not guaranteed, and the test efficiency is extremely low. Especially in the railway or subway system, various instruments and equipment need to be tested by vibration, and the quantity and variety are large, so a safe and disassembly-free device which is directly fixed with the vibration table together is needed to improve the test efficiency. The application is a disassembly-free device for a series of vibration tests of railway or subway system dispatching case equipment. SUMMARY

[0003] In view of the problems existing in the prior art, the application provides a disassembly-free device for a case vibration test and a use method, so that the safety of the equipment under test is higher during the vibration test, the disassembly is more convenient, and the test efficiency is improved. The technical scheme of the application is: a disassembly-free device for a case vibration test, comprising a bottom plate, a front screw nut of a lead screw, a rear screw nut of the lead screw, a handle, a lead screw stop block, a dovetail groove slide, an upper cover plate, a lead screw, a sliding support, a fixed support and a rotating shaft, the front screw nut of the lead screw is a cylindrical body with a flange plate at one end face, the outer diameter of the cylindrical body is the same as the inner diameter of the front screw nut fixing hole of the fixed support, the center of the cylindrical body has a stepped hole, the small hole diameter hole is a stepped thread hole matched with the lead screw, and the large hole diameter hole is a through hole with a diameter slightly smaller than the outer diameter of the stop disc of the lead screw, the rear screw nut of the lead screw is a cylindrical body with a flange plate at one end face, the front screw nut of the lead screw is fixed in the front screw nut fixing hole of the fixed support, and the fixed support is fixed at the front end of the bottom plate, the dovetail slide has two pieces and is fixed on the two side faces of the rear end of the bottom plate, the rear screw nut of the lead screw is fixed in the rear screw nut fixing hole of the sliding support, the sliding support is matched together with the two slides through the two side dovetail grooves, the front end of the lead screw is rotated through the front screw nut of the lead screw and the lead screw stop block in sequence, so that the stop disc of the lead screw is located in the large hole diameter hole of the front screw nut of the lead screw, and the lead screw stop block is tightly pressed against the front end face of the front screw nut of the lead screw, the smooth rod of the lead screw without threads is tightly matched with the center hole of the handle, the rear end of the lead screw is rotated into the rear screw nut, and the front screw nut of the lead screw, the rear screw nut of the lead screw and the lead screw form a nut and screw rod structure matched with each other, the upper cover plate and the fixed support are both provided with rotating shaft mounting holes, the rotating shaft assembles the upper cover plate and the fixed support together, the upper cover plate is matched with the rotating shaft to rotate, and the sliding support and the upper cover plate are tightly locked together by a locking screw, and the bottom plate is fixed on the upper end face of the vibration test table.

[0004] The middle part of the fixed support has a screw nut fixing hole, and the inner side has a measured machine box groove, which is a rectangular slot with three closed sides and one open side, facilitating the measured equipment to be pushed from the side.

[0005] The sliding support has a plurality of through holes, reducing weight and eliminating machining stress, and the middle part has a screw nut fixing hole, and the inner side above the screw nut fixing hole has a measured machine box groove, which is opposite to the measured machine box groove of the fixed support and has the same size, and the two side surfaces of the sliding support have dovetail grooves.

[0006] The bottom plate has a plurality of through holes for fixing with vibration test benches of different models and specifications.

[0007] The size of the upper cover plate is a series size, and when the size of the tested equipment is different, only the upper cover plate of the same size needs to be replaced, and the test upper cover plate has a plurality of upper cover plate weight reduction through holes uniformly distributed.

[0008] The use method comprises the following steps,

[0009] The first step is to turn the locking screw, flip open the upper cover plate, rotate the handle, and the handle drives the screw rod to rotate, and the screw rod drives the sliding support to follow, and the relative distance between the sliding support and the fixed support is adjusted to be greater than the length size of the measured machine box;

[0010] The second step is to put the measured machine box into the measured machine box groove of the fixed support and the measured machine box groove of the sliding support from the side, continue to rotate the handle, make the measured machine box and the fixed support and the sliding support in the tight fit state without gap, flip the upper cover plate, tighten the locking screw, and the vibration test starts;

[0011] The third step is to loosen the locking upper cover screw, rotate the upper cover plate, rotate the handle in the opposite direction, adjust the gap between the sliding support and the fixed support, and take out the measured machine box from the measured machine box groove of the fixed support and the measured machine box groove of the sliding support from the side, and the whole test process is completed.

[0012] The beneficial effects of the present application are simple operation, high safety, continuous testing without repeated disassembly and rapid installation of the measured machine box, meeting the requirements of convenient and fast experiment, improving the test efficiency. The series and flip cover plate design reduces the number of screws, improves the integrity of the equipment, reduces the resonance probability in the vibration process, and is suitable for use with machine boxes of various sizes. The frame design of each support reduces the weight of the equipment and improves the overall reliability. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a structural perspective view of the present application;

[0014] Figure 2 This is a perspective view of the lead screw structure of the present invention;

[0015] Figure 3 This is a perspective view of the lead screw front nut structure of the present invention;

[0016] Figure 4 This is a perspective view of the fixing bracket of the present invention;

[0017] Figure 5 This is a perspective view of the sliding bracket of the present invention. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example

[0019] like Figure 1 As shown, in the on-site working environment of railways or subways, the dispatching equipment that travels with the train needs to meet the on-site vibration working environment. Therefore, all dispatching cabinet equipment produced in batches must undergo environmental vibration testing to meet the requirements for production. Taking the tested cabinet as an example, the train dispatching transfer box 12 has an overall external dimension of 550mm in length, 118mm in height, and 300mm in width.

[0020] like Figures 1-5 As shown, a non-disassembly device for chassis vibration testing includes a base plate 1, a front screw nut 2, a rear screw nut 3, a handle 4, a screw stop 5, a slide rail 6, a top cover plate 7, a screw 8, a sliding bracket 10, a fixed bracket 11, a railway dispatching chassis 12, and a top cover plate 13. The front screw nut 2, the rear screw nut 3, and the screw 8 are nuts and screws with trapezoidal threads that mesh with each other. The front screw nut 2 passes through the front screw nut fixing hole 11-1 of the fixed bracket 11. The flange of the front screw nut 2 is fixed to the outer end face of the fixed bracket 11 by screws. The fixed bracket 11 is fixed to the front end of the base plate 1 by screws. There are two slide rails 6, which are fixed to the two sides of the rear end of the base plate 1 with screws. The screw nut 3 is inserted into the screw nut fixing hole 10-3 of the sliding bracket 10. The flange of the screw nut 3 is fixed to the outer end face of the sliding bracket 10 with screws, so that the sliding bracket 10 slides at the upper limit of the two slide rails 6, thereby adjusting the distance between the sliding bracket 10 and the fixed bracket 11. The overall horizontal length of the vibration testing device is adjustable between 600mm and 500mm.

[0021] The screw nut 3, the screw nut 2, the screw block 5 are rotated on the screw 8, the stop disc 8-1 of the screw 8 is located in the large aperture hole of the screw nut 2, and the screw block 5 is tightly pressed against the front end face of the screw nut 2, the smooth rod 8-2 without screw thread of the screw 8 is tightly matched with the handle 4 to achieve synchronous rotation, and during the experiment, the train dispatching adapter box is arranged between the sliding support measured machine box groove 10-4 of the sliding support 10 and the fixed support measured machine box groove 11-2 of the fixed support 11.

[0022] After the whole device is assembled, the connection with the vibration table is realized by the bottom plate screw hole.

[0023] Method for use: the upper cover plate 7 and the sliding support 10 locking screw are opened, the upper cover plate 7 is turned over, the handle 4 is rotated, the distance between the fixed support 11 and the sliding support 10 is adjusted, the dispatch adapter box 12 is accurately clamped, the upper cover plate is turned over and placed on the top of the sliding support, the screw hole position is aligned, the sliding support and the upper cover plate are locked, the vibration test is carried out according to the test requirements, and the technical parameters of the train dispatch adapter box are tested during the vibration process, whether it meets the actual use requirements, after the test is completed, the upper cover plate 7 and the sliding support 10 locking screw are opened, the upper cover plate 7 is turned over, the handle 4 is rotated, the distance between the fixed support 11 and the sliding support 10 is adjusted, and the railway dispatch machine box 12 is taken out for detection of the next machine box.

[0024] If different models and specifications of machine boxes are replaced for testing, the corresponding size of the cover plate 7 needs to be replaced, and then the vibration test is carried out according to the above use method.

[0025] Features:

[0026] 1. The rotation of the nut is converted into the linear motion of the screw rod, which drives the sliding support to move to adjust the distance between the sliding support and the fixed support.

[0027] 2. The upper locking structure of the flip-up cover plate makes the device form a whole, which is more stable during the vibration test and has better overall performance.

[0028] 3. The one-side open design of the grooves on both sides of the fixed support and the sliding support facilitates the insertion and removal of the measured parts, accurately positions and locks the measured machine box, reduces the number of screws used, and is easy to operate.

[0029] 4. The sliding support, the upper cover plate and the sliding support are designed with weight reduction holes, which not only reduce the weight, but also eliminate the stress generated during the processing of structural parts and reduce the distortion.

[0030] 5. The dovetail groove slide is matched with trapezoidal threads to avoid resonance caused by loosening during the experiment of the device.

Claims

1. A non-disassembly-free device for chassis vibration testing, comprising a base plate (1), a front nut (2) of a lead screw, a rear nut (3) of a lead screw, a handle (4), a lead screw stop (5), a dovetail groove slide (6), a top cover plate (7), a lead screw (8), a sliding bracket (10), a fixed bracket (11), and a rotating shaft (13), characterized in that: The lead screw front nut (2) is a cylinder with a flange on one end face. The outer diameter of the cylinder is the same as the inner diameter of the lead screw front nut fixing hole (11-1) of the fixed bracket (11). There is a stepped hole in the center of the cylinder. The small-diameter hole is a trapezoidal threaded hole that mates with the lead screw (8). The large-diameter hole is a through hole with a diameter slightly smaller than the outer diameter of the retainer (8-1) of the lead screw (8). The lead screw rear nut (3) is a cylinder with a flange on one end face. The lead screw front nut (2) is fixed in the fixed bracket (11). The fixed bracket (11) is fixed in the screw front nut fixing hole (11-1) of the fixed bracket (11), and the fixed bracket (11) is fixed at the front end of the base plate (1). There are two dovetail groove slides (6), which are fixed to the two sides of the rear end of the base plate (1). The screw rear nut (3) is fixed in the screw rear nut fixing hole (10-3) of the sliding bracket (10). The sliding bracket (10) is connected to the two dovetail groove slides (6) through the two dovetail grooves (10-2) on both sides. The front end of the lead screw (8) rotates sequentially through the lead screw front nut (2) and the lead screw stop (5), so that the stop plate (8-1) of the lead screw (8) is located in the large diameter hole of the lead screw front nut (2), and the lead screw stop (5) is pressed against the front end face of the lead screw front nut (2). The smooth rod (8-2) of the lead screw (8) without threads is tightly fitted with the center hole of the handle (4). The rear end of the lead screw (8) rotates and passes into the lead screw rear nut (3), forming the lead screw front nut (2) and the lead screw... The nut (3) and the lead screw (8) are nut and screw structures with trapezoidal threads that cooperate with each other. The upper cover plate (7) and the fixed bracket (11) are both provided with shaft mounting holes. The shaft (13) assembles the upper cover plate (7) and the fixed bracket (11) together, so that the upper cover plate (7) rotates around the shaft (13) in a dynamic fit. The sliding bracket (10) and the upper cover plate (7) are locked together with the locking screw. The base plate (1) is fixed on the upper surface of the vibration test bench.

2. The non-disassembly-free device for chassis vibration testing as described in claim 1, characterized in that: The fixed bracket (11) has a screw front nut fixing hole (11-1) in the middle and a fixed bracket test chassis groove (11-2) on the inner side. The groove is a rectangular groove that is closed on three sides and open on one side.

3. The non-disassembly-free device for chassis vibration testing as described in claim 1, characterized in that: The sliding bracket (10) has several through holes (10-1) to reduce weight and eliminate machining stress. There is a screw nut fixing hole (10-3) in the middle. There is a sliding bracket test chassis groove (10-4) on the inner side above the screw nut fixing hole (10-3). This groove is opposite to the fixed bracket test chassis groove (11-2) and has the same size. There are dovetail grooves (10-2) on the lower part of both sides of the sliding bracket (10).

4. The non-disassembly-free device for chassis vibration testing as described in claim 1, characterized in that: The base plate (1) has several through holes for fixing to vibration test benches of different models and specifications.

5. The non-disassembly-free device for chassis vibration testing as described in claim 1, characterized in that: The upper cover plate (7) has a series of dimensions. When the size of the tested equipment is different, only the upper cover plate (7) of the same size needs to be replaced. The test upper cover plate (7) has several evenly distributed upper cover plate weight reduction through holes (7-2).

6. The method of using the non-disassembly-free device for chassis vibration testing as described in claim 1, characterized in that: The usage method includes the following steps. Step 1: Tighten the screws, flip open the top cover (7), turn the handle (4), the handle (4) drives the lead screw (8) to rotate, the lead screw (8) drives the sliding bracket (10) to move accordingly, adjust the relative distance between the sliding bracket (10) and the fixed bracket (11) to be greater than the length of the test chassis (12); Step 2: Place the test chassis into the groove (11-2) of the fixed bracket test chassis and the groove (10-4) of the sliding bracket test chassis from the side. Continue to rotate the handle (4) so ​​that there is no gap between the test chassis and the fixed bracket (11) and the sliding bracket (10) and they are in a tight fit. Flip the top cover (7) and tighten the locking screws to start the vibration test. Third step: After the test is completed, loosen the locking screws of the top cover, rotate the top cover (7), rotate the handle in the opposite direction, adjust the gap between the sliding bracket (10) and the fixed bracket (11) to increase the gap, and take out the test chassis from the side of the test chassis groove (10-4) of the sliding bracket and the test chassis groove (11-2) of the fixed bracket. The whole test process is completed.

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