Connection structure for vibration testing of band-loaded products and testing system comprising it

Abstract

The application discloses a connecting structure for vibration test of belt-loaded products and a test system comprising the same, the connecting structure comprising an adjusting part connected with a transmission shaft, the adjusting part comprising at least one of a first adjusting part and a second adjusting part, the first adjusting part comprising an outer sleeve, a first flange and at least three groups of first adjusting members, the first flange having a connecting head arranged inside the outer sleeve, the first flange being connected with the transmission shaft, and the connecting head and the outer sleeve being provided with an adjusting gap in a radial direction; the number of the first adjusting members in each group is at least two, the first adjusting member comprising an elastic block, and the first adjusting member being connected with the outer sleeve and the connecting head through two connecting bolts respectively, and the second adjusting part being used for overcoming the axial expansion force of the transmission shaft. The connecting structure can offset the swing or swing of the transmission shaft, and the adjusting space for position recovery of the transmission shaft during swing is larger due to the adjusting gap, so that the bending force on the transmission shaft is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vibration testing, in particular to a connecting structure for vibration testing of a product under load and a testing system comprising the same. BACKGROUND

[0002] When the vibration performance of a product needs to be detected, the product needs to be in a working state (i.e. "under load" state), and thus the driving source needs to be directly or indirectly connected to the product. Therefore, when the product is subjected to vertical or horizontal vibration or reciprocating vibration along a direction parallel to the horizontal plane, the driving shaft will also be subjected to shaking, swinging or vibration or stretching force along the axial direction. Since the driving source is fixed, the bending deformation of the driving shaft or the transmission effect of the driving shaft on the product under test is easily affected.

[0003] If the shaking, swinging or vibration of the driving shaft is not controlled, the driving shaft may even swing with a large amplitude under vibration. Since the length of the driving shaft is usually about 1 meter, the swinging amplitude of the end of the driving shaft away from the product will be amplified when the product is vibrated, resulting in a loud screeching noise during vibration testing, and the driving shaft will not be able to smoothly drive the input shaft of the product to rotate, so that the product cannot be in a normal working state, thereby affecting the detection effect of the vibration performance of the product under load.

[0004] In addition, when the product under test is subjected to vibration testing, performance testing in multiple vibration directions may be required, and thus the driving shaft may swing or interfere with the product under test in different directions under different testing requirements. Therefore, different connecting structures for vibration testing of a product under load need to be replaced according to different testing requirements, which increases the labor burden and testing cost. SUMMARY

[0005] To overcome the above-mentioned shortcomings, one of the purposes of the present application is to provide a connecting structure for vibration testing of belt-loaded products, for connecting with a transmission shaft and an input shaft of a product to be tested, comprising an adjusting part connected with the transmission shaft, the adjusting part comprising at least one of a first adjusting part and a second adjusting part, the first adjusting part comprising: an outer sleeve having a hollow cylinder body; a first flange having a connecting head arranged inside the outer sleeve and a first connecting edge with an outer diameter larger than the connecting head, the first flange being connected with the transmission shaft through the first connecting edge, and the connecting head and the outer sleeve being provided with an adjusting gap in the radial direction; at least three groups of first adjusting members, the number of each group of first adjusting members being at least two, the first adjusting member comprising an elastic block, one connecting bolt being arranged on each of the two sides of the elastic block away from each other, the shanks of the two connecting bolts being arranged away from each other, and the first adjusting member being connected with the outer sleeve and the connecting head through the two connecting bolts respectively, and the second adjusting part being used to overcome the axial expansion force of the transmission shaft.

[0006] The present application has the following beneficial effects:

[0007] ①The elastic blocks of the first adjusting members of the first adjusting part of the present application are connected with the outer sleeve and the connecting head respectively, so that when the product to be tested is subjected to a force in a direction perpendicular to the transmission shaft, the gap between the outer sleeve and the connecting head changes when the transmission shaft is subjected to vibration and swings, and at this time the elastic blocks apply a force opposite to the swinging force to the connecting head, so that the connecting head always remains in the position of the radial center of the outer sleeve, and since the connecting head is connected with the transmission shaft, the swing or sway of the transmission shaft can be offset. By providing an adjusting gap between the outer sleeve and the connecting head, the adjustment space for position recovery of the transmission shaft when swinging is larger, reducing the bending force on the transmission shaft; at the same time, the first adjusting members can deform and recover, so that the transmission shaft can still remain in the position of the radial center even in the case of a large swing due to vibration, thereby preventing the transmission shaft from swinging in the case of vibration and ensuring stable input of the circumferential rotation force to the product to be tested, without noise and with more accurate test results.

[0008] By arranging the elastic blocks on the outer circumferential side of the connecting head, the present application can quickly offset the swinging force of the transmission shaft. Since the elastic blocks are connected with the outer sleeve and the connecting head respectively, the elastic blocks have a certain "rigidity" effect while maintaining the original elastic recovery force, so that the radial centering effect of the transmission shaft can be quickly achieved.

[0009] The first adjusting member of the application is connected with the outer sleeve and the connecting head quickly and conveniently through the two connecting bolts arranged on the two sides of the elastic block.

[0010] The first flange is arranged with the connecting head arranged in the inner part of the outer sleeve and the first connecting edge with the outer diameter larger than the connecting head, so that the force on the transmission shaft is transmitted to the connecting head arranged in the inner part of the outer sleeve through the first connecting edge, and the position of the connecting head can be adjusted and restored through the first adjusting member, so that the force on the transmission shaft due to the shaking or swinging is overcome.

[0011] The first adjusting member of the application is connected with the outer sleeve and the connecting head quickly and conveniently through the two connecting bolts arranged on the two sides of the elastic block.

[0012] Further, the surface of the connecting head near the outer sleeve is arranged with a containing groove one for containing part of the elastic block, and the area of the outer sleeve opposite to the containing groove one is arranged with a containing groove two for containing part of the elastic block. Thus, the elastic block can be connected with the outer sleeve and the connecting head at the same time, so that when the force on the transmission shaft due to the shaking or swinging is transmitted to the connecting head, the connecting head will also produce a radial swinging force, at this time, the elastic block can quickly offset the vibration force on the connecting head, so that the transmission shaft can be eliminated due to the vibration.

[0013] Further, the surface of the connecting head near the outer sleeve is arranged with a containing groove one for containing part of the elastic block, and the area of the outer sleeve opposite to the containing groove one is arranged with a containing groove two for containing part of the elastic block. Thus, the elastic block can be connected with the outer sleeve and the connecting head at the same time, so that when the force on the transmission shaft due to the shaking or swinging is transmitted to the connecting head, the connecting head will also produce a radial swinging force, at this time, the elastic block can quickly offset the vibration force on the connecting head, so that the transmission shaft can be eliminated due to the vibration.

[0014] Further, the two connecting bolts of the first adjusting member and the elastic block are an integral part. Thus, the first adjusting member can be connected with other structures, and the swinging force of the transmission shaft transmitted by the connecting head can be offset after being transmitted to the first adjusting member through the connecting bolts.

[0015] Further, the number of the first adjusting members in each group is two, and each group of the first adjusting members is distributed in phase along the circumferential direction of the outer sleeve. Thus, the swing force received by the connecting head is quickly counteracted under the cooperation of the two first adjusting members, and the swing amplitude of the transmission shaft connected by the connecting head is maximally reduced.

[0016] Further, the second adjusting part includes two groups of second adjusting members arranged near the two mutually distant ends of the transmission shaft, and each group of the second adjusting members includes two U-shaped springs oppositely arranged, the diameter direction of the opening of the U-shaped spring is along the length direction of the transmission shaft, and the length direction of the U-shaped spring is perpendicular to the axial direction of the transmission shaft. The adjusting part of the present application includes at least one of the first adjusting part and the second adjusting part, the first adjusting part can overcome the swing of the transmission shaft during vibration, and the second adjusting part can counteract the vibration force in the axial direction of the transmission shaft. The second adjusting part of the present application ingeniously uses the U-shaped spring structure, which has a larger adjusting space in the middle part in the axial direction of the transmission shaft, so that it can counteract a larger axial compression deformation of the transmission shaft, up to 2-3 cm, so as to meet the requirement of vibration performance detection of higher amplitude.

[0017] Further, the two groups of second adjusting members arranged near the two mutually distant ends of the transmission shaft are arranged in a 90-degree staggered manner. Thus, when the transmission shaft rotates at high speed, the two second adjusting components can form a staggered balance effect, so as to minimize the interference of the axial expansion force of the transmission shaft, and maintain the transmission stability of the whole system during detection.

[0018] Further, a connecting plate for fixing the U-shaped spring is arranged on each outer side of the U-shaped spring. When the connecting structure for the vibration test of the product with load has the first adjusting part and the second adjusting part, the two groups of the first adjusting part are connected with the two ends of the transmission shaft, and the connecting plates of the two groups of the second adjusting part are arranged on the side away from the transmission shaft of the first adjusting part, respectively. When the connecting structure for the vibration test of the product with load only has the second adjusting part, the connecting plate of the second adjusting part is connected with the transmission shaft. Thus, the two U-shaped springs and the two connecting plates can form a structure with adjustable compression range as a whole, and the second adjusting part is convenient to connect with other mechanisms.

[0019] The second purpose of the present application is to provide a vibration test system, which includes the connecting structure for the vibration test of the product with load.

[0020] Further, an output shaft connected with the transmission shaft through the first adjusting part and / or the second adjusting part is further included, a driving gear is arranged on the output shaft, a driven gear is arranged coaxially on the input shaft of the product to be tested, and the tooth diameter of the driving gear is larger than that of the driven gear. Thus, by setting the tooth diameter ratio of the driving gear to the driven gear to be larger than 1, the simulation of the working condition of the higher working speed of the product to be tested can be realized under the premise of the relatively low rotating speed of the driving source. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 Structure diagram of the first adjusting part of the present application when connected with the transmission shaft;

[0022] Figure 2 Structure diagram of the first adjusting part of the present application when connected with the second flange;

[0023] Figure 3 Structure diagram of the first adjusting part of the connecting structure of the present application when the first adjusting part is not provided with the first adjusting member;

[0024] Figure 4 Structure diagram of the connecting structure of the present application when connected with the driving source and the transmission shaft;

[0025] Figure 5 Structure diagram of the connecting structure of the present application when the first adjusting part and the second adjusting part are both provided;

[0026] Figure 6 Structure diagram of the connecting structure of the present application when only the second adjusting part is included.

[0027] In the drawings:

[0028] 1, transmission shaft; 11, second connecting edge; 2, input shaft; 3, first adjusting part;

[0029] 31, outer sleeve; 311, accommodating groove two; 312, mounting hole two;

[0030] 32, first flange; 321, connecting head; 3211, accommodating groove one; 3212, mounting hole one; 322, first connecting edge;

[0031] 33, first adjusting member; 331, elastic block; 332, connecting bolt;

[0032] 34, adjusting gap; 35, baffle; 4, second adjusting part; 41, second adjusting member; 42, connecting plate;

[0033] 5, second flange;

[0034] 51, avoiding slot; 52, gasket; 53, spring gasket. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0036] Example 1:

[0037] See appendix Figures 1-6 As shown, the connection structure for vibration testing of a loaded product in this embodiment is used to connect to the drive shaft 1 and the input shaft 2 of the product under test. It includes a first adjustment part 3 connected to the drive shaft 1, which transmits the rotational force of the drive source to the product under test. The first adjustment part 3 is used to counteract the swaying, vibration, or shaking forces of the drive shaft 1 during the vibration testing process, ensuring that the product under test is in a stable loaded working state when the product's vibration performance is tested.

[0038] See appendix Figure 2 and attached Figure 3 As shown, the first adjusting part 3 of the present invention includes an outer sleeve 31, a first flange 32, and at least three sets of first adjusting members 33. The outer sleeve 31 has a hollow cylindrical body. The first flange 32 includes a connector 321 disposed inside the outer sleeve 31 and a first connecting edge 322 with an outer diameter larger than the connector 321. The connector 321 and the first connecting edge 322 are integral parts. The drive shaft 1 is connected to the first connecting edge 322 of the first flange 32. An adjusting gap 34 is reserved between the connector 321 and the outer sleeve 31 in the radial direction. The first adjusting members 33 are respectively connected to the outer sleeve 31 and the connector 321. The width of the adjusting gap 34 is set along the radial direction of the outer sleeve 31, and the length is set along the axial direction of the outer sleeve 31. The width of the adjusting gap 34 is usually 1-5mm, for example, it can be 1mm, 2mm, 2.5mm, 3mm, 4mm, etc. Therefore, when the drive shaft 1 connected to the product under test is subjected to vibration and swings, its swing range is approximately within a conical space with the straight line where the drive shaft 1 is not vibrating as the central axis. By setting the adjustment gap 34, a larger adjustment distance can be formed. At the same time, in conjunction with the function of the first adjustment member 33, the drive shaft 1 can still maintain an axially centered position under vibration, thereby preventing the drive shaft 1 from swinging under vibration. This ensures a stable input of the circumferential rotational force of the product under test, does not generate noise, and effectively simulates the product's load-bearing working state, resulting in more accurate test results.

[0039] The structure of the elastic sheet arranged at the end of the transmission shaft 1 in the axial direction in the prior art is weak in overcoming the swing force of the transmission shaft 1 when the transmission shaft 1 swings, and the transmission shaft 1 is in abutment or connection with the area of the center of the elastic sheet, so that the displacement space of the transmission shaft 1 in the swing direction is limited when the transmission shaft 1 applies a deformation force to the elastic sheet, and the ability to offset the swing of the transmission shaft is weak.

[0040] The number of each group of first adjusting members 33 is at least two, and each group of first adjusting members 33 is sequentially distributed along the axial direction of the outer sleeve 31. The axial direction of the first adjusting member 33 is perpendicular to the axial direction of the outer sleeve 31. The first adjusting member 33 includes an elastic block 331 having an elastic deformation capability (for example, the elastic block 331 can be made of elastic rubber or silicone material), and one connecting bolt 332 is arranged on each side of the elastic block 331 away from each other, and the shanks of the two connecting bolts 332 are arranged away from each other, so that when the first adjusting member 33 is installed, one connecting bolt 332 is connected with the connecting head 321, and the other connecting bolt 332 is connected with the wall of the outer sleeve 31.

[0041] The connecting structure of the application can quickly offset the swing force of the transmission shaft 1 by arranging the elastic block 331 on the outer circumferential side of the connecting head 321, and the elastic block 331 is connected with the outer sleeve 31 and the connecting head 321 respectively, so that the elastic block 331 has a certain "rigidity" effect while maintaining the original elastic restoring force, thereby quickly realizing the radial centering effect of the transmission shaft 1, thereby minimizing the swing of the transmission shaft 1 caused by vibration. By arranging the adjusting gap 34 between the outer sleeve 31 and the connecting head 321, the transmission shaft 1 has a larger adjusting space for position recovery when it swings, and the bending force on the transmission shaft can also be reduced.

[0042] There is also a gap between the side of the connecting head 321 close to the barrel bottom of the outer sleeve 31 and the barrel bottom, so that the connecting head 321 can quickly recover to the center position in the outer sleeve 31.

[0043] In some embodiments, the two connecting bolts 332 of the first adjusting member 33 are integrated with the elastic block 331, for example, the two connecting bolts 332 can be directly injection molded with the elastic block 331 during injection molding of the elastic block 331. Thus, the first adjusting member 33 can be conveniently connected with other structures, and the integrated structure of the first adjusting member 33 facilitates the transmission of the swing force of the transmission shaft 1 from the connecting head 321 to the first adjusting member 33 through the connecting bolts 332 and is offset.

[0044] In other possible embodiments, the connecting bolt 332 and the elastic block 331 can also be separate parts, and a limiting hole for accommodating the head of the connecting bolt 332 is further arranged on the side of the elastic block 331 close to the connecting head 321 and the cylinder wall of the outer sleeve 31, respectively. The hole wall of the limiting hole can limit and wrap the head of the connecting bolt 332, so that the connecting bolt 332 can form a more close connection effect with the elastic block 331. When the product is subjected to load detection, the connecting head 321 also swings in the outer sleeve 31 when the swing action force is generated on the transmission shaft 1. At this time, the elastic block 331 brings the restoring force to keep the connecting head 321 in the radial central position, thereby overcoming the swing action force on the transmission shaft 1, and always keeping the transmission shaft 1 in the central position.

[0045] For better understanding, see the attached drawings Figure 3 In some embodiments, the accommodating groove one 3211 for accommodating part of the elastic block 331 is arranged on the outer surface of the connecting head 321, and the accommodating groove two 311 for accommodating part of the elastic block 331 is arranged on the area of the outer sleeve 31 opposite to the accommodating groove one 3211, that is, the elastic block 331 is connected with the outer sleeve 31 and the connecting head 321 at the same time, and the volume and height of the elastic block 331 in the accommodating groove one 3211 and the accommodating groove two 311 are similar. Thus, when the vibration force on the transmission shaft 1 is transmitted to the connecting head 321, the connecting head 321 also generates radial swing force, and at this time, the elastic block 331 quickly offsets the vibration force on the connecting head 321, so that the connecting head 321 is in the radial central position, and the swing of the transmission shaft 1 due to vibration is eliminated.

[0046] In some embodiments, the mounting hole one 3212 in communication with the accommodating groove one 3211 is further arranged on the connecting head 321, and the screw rod of the connecting bolt 332 close to the connecting head 321 of the first adjusting member 33 can be mounted into the mounting hole one 3212.

[0047] The mounting hole two 312 recessed to the axial center line of the outer sleeve 31 is arranged on the cylinder wall of the outer sleeve 31, the mounting hole two 312 is in communication with the accommodating groove two 311, and the inner diameter of the mounting hole two 312 is greater than the hole diameter of the accommodating groove two 311. A stepped structure is formed between the hole bottom of the mounting hole two 312 and the accommodating groove two 311, the threaded portion of the connecting bolt 332 of the first adjusting member 33 is located in the mounting hole two 312, the stop plate 35 capable of being sleeved on the connecting bolt 332 is arranged in the mounting hole two 312, and the stop plate 35 is in abutment with the stepped structure area of the hole bottom of the mounting hole two 312. At this time, the adjusting bolt is quickly connected with the outer sleeve 31 by arranging the locking nut.

[0048] In some embodiments, the first adjusting members 33 of each group are distributed in phase along the circumferential direction of the outer sleeve 31, so that the centering force exerted by the first adjusting members 33 on the connecting head 321 is more uniform.

[0049] In some embodiments, each group of first adjusting members 33 includes two, and is arranged along the axial direction of the transmission shaft 1. By arranging two first adjusting members 33 in each group, the restoring force exerted on the connecting head 321 to keep it centered can be sufficiently ensured, and the swing of the connecting head 321 during vibration can be minimized. (When there is only one first adjusting member 33 in each group, although it still generates an elastic force to center the connecting head 321, the connecting head 321 still swings slightly. However, by arranging two first adjusting members 33, they can form a mutual restraining “pulling force” on the connecting head 321. For example, one first adjusting member 33 exerts a force on the connecting head 321 in a direction away from the axial center line of the connecting head 321, while the other first adjusting member 33 exerts a force on the connecting head 321 in a direction towards the axial center line of the connecting head 321. Therefore, under the mutual cooperation of the two first adjusting members 33, the swing force on the connecting head 321 is quickly counteracted, thereby ensuring that the swing amplitude of the transmission shaft 1 connected to the connecting head 321 is minimized.

[0050] In some embodiments, a first adjusting part 3 is arranged at each end of the transmission shaft 1, and is connected to the output shaft of the driving source and the input shaft 2 (or its transmission assembly) of the product to be tested, respectively.

[0051] In some embodiments, referring to FIG. 1, the first adjusting part 3 is arranged at one end of the transmission shaft 1, and is connected to the output shaft of the driving source. Figure 1 As shown, a second connecting edge 11 opposite to the first connecting edge 322 of the first flange 32 is arranged at the end of the transmission shaft 1 close to the first flange 32. A plurality of groups of connecting holes capable of penetrating each other are arranged on the first connecting edge 322 and the second connecting edge 11. By installing a fixing bolt in the connecting holes, the transmission shaft 1 can be connected to the first adjusting part 3.

[0052] In some embodiments, referring to FIG. 1, the first adjusting part 3 is arranged at one end of the transmission shaft 1, and is connected to the output shaft of the driving source. Figure 3 and FIG. 2, the first adjusting part 3 is arranged at one end of the transmission shaft 1, and is connected to the input shaft 2 of the product to be tested. Figure 4As shown, the output shaft of the driving source is connected with the connecting structure of the application through the second flange 5, the output shaft of the driving source passes through the middle of the second flange 5, and the inner recessed avoiding slot 51 is arranged at the end of the second flange 5 away from the driving source. The nut is arranged in the avoiding slot 51, which is convenient for connecting with the output shaft of the driving source and does not hinder the connection between the second flange 5 and the connecting structure of the application. A plurality of mounting holes are arranged on the side wall of the outer sleeve 31 near the second flange 5, and corresponding holes are arranged on the second flange 5, which pass through the second flange 5 in the axial direction. The connecting bolt 332 is arranged in the hole body and connected with the mounting hole, thereby realizing the connection between the second flange 5 and the connecting structure of the application. The gasket 52 and the spring washer 53 are arranged in sequence on the side of the nut near the driving source, thereby ensuring more stable connection with the output shaft of the driving source.

[0053] Referring to the accompanying drawings Figure 5 and the accompanying drawings Figure 6 In some embodiments, the connecting structure further comprises a second adjusting part 4, the second adjusting part 4 comprises two groups of second adjusting members 41 arranged near the two mutually distant ends of the transmission shaft 1 respectively, each group of second adjusting members 41 is two U-shaped springs with openings arranged oppositely, and the diameter direction of the openings of the U-shaped springs is along the length direction of the transmission shaft 1, and the length direction of the U-shaped springs is perpendicular to the axial direction of the transmission shaft 1.

[0054] The vibration force in the axial direction of the transmission shaft 1 can be offset by the second adjusting members 41. The two groups of second adjusting members 41 arranged near the two mutually distant ends of the transmission shaft 1 are arranged at 90 degrees, thereby forming the effect of staggered balance when the transmission shaft 1 rotates at high speed. In this embodiment, the U-shaped springs with openings arranged oppositely are used as the second adjusting part 4, and a connecting plate 42 for fixing the U-shaped spring is arranged on each outer side of the U-shaped spring, thereby forming a structure with adjustable compression range in the axial direction of the transmission shaft 1 as a whole, and facilitating the connection between the second adjusting part 4 and other mechanisms. Since the diameter of the circular arc of the cross section of the opening of the U-shaped spring is arranged in the axial direction of the transmission shaft 1, when the transmission shaft 1 is subjected to axial compression force, the U-shaped spring can exert a reverse force on the transmission shaft 1, thereby offsetting the axial compression force of the transmission shaft 1 and ensuring stable power output.

[0055] By using the connecting structure of the embodiment, the transmission shaft 1 can neither swing in the case of vibration nor offset the vibration force in the axial direction of the transmission shaft 1. Thus, the detection requirement of various vibration modes of the product can be met, the power input to the product during the vibration detection of the product can be ensured to be stable, the loaded state of the product can be effectively simulated, and the noise caused by the swing or shake of the transmission shaft 1 during the vibration process can be avoided.

[0056] Compared with the structure of setting the cowhide or other elastic sheet between the two connecting plates in the prior art, the second adjusting part 4 of the embodiment has a larger adjusting space in the middle part in the axial direction of the transmission shaft 1, so that the axial compression deformation of the transmission shaft 1 that can be offset is larger, which can be up to 2-3 cm, while the axial deformation that can be offset by the elastic sheet is usually only 2-3 mm.

[0057] In some embodiments, two groups of the first adjusting parts 3 are directly connected with the two end parts of the transmission shaft 1, and two groups of the second adjusting parts 4 are respectively arranged on the side of the first adjusting part 3 away from the transmission shaft 1. The outer sleeve 31 of the first adjusting part 3 is in the form of an open cylinder as a whole, the bottom wall of the outer sleeve 31 is located at the end away from the transmission shaft 1, and is connected with the one side connecting plate 42 of the second adjusting part 41, and correspondingly, the other side connecting plate 42 of the second adjusting part 41 is connected with the second flange 5.

[0058] Referring to FIG. 1, Figure 6 In some embodiments, the connecting structure of the application only contains the second adjusting part 4, and does not contain the first adjusting part 3. Thus, the connecting structure of this embodiment can be applied to the case where the transmission shaft 1 only produces axial extension deformation.

[0059] Embodiment two:

[0060] The embodiment is a vibration test system of a loaded product, which contains the connecting structure for the vibration test of the loaded product of the embodiment one and the vibration table. By placing the product to be tested on the extension table connected with the vibration table, and connecting the transmission shaft 1 with the input shaft 2 of the product, the vibration test of the product in the loaded state can be realized.

[0061] When the load rotating speed requirement of the product to be tested is high, an output shaft connected with the transmission shaft 1 through the first adjusting part 3 and / or the second adjusting part 4 can be arranged, and a driving gear is arranged on the output shaft. Correspondingly, a driven gear is arranged coaxially on the input shaft 2 of the product to be tested, and the tooth diameter of the driving gear is set to be larger than that of the driven gear. Thus, by setting the tooth diameter ratio of the driving gear to the driven gear to be larger than 1 or higher, the working condition of the product to be tested at a higher working rotating speed can be simulated under the premise of a relatively low rotating speed of the driving source. Since the rotating speed of the driving source is reduced, the shaking amplitude of the transmission shaft 1 can also be reduced fundamentally. For example, when the product to be tested is a generator, after the generator is connected with the performance detection instrument, if the performance of the generator under the condition of a rotating speed of 6000 rpm and vibration needs to be detected, the wheel diameter ratio of the driving gear to the driven gear is set to be 3:1, and then the output rotating speed of the driving source is only required to be 2000 rpm to meet the performance detection requirement of the generator under the condition of a load rotating speed of 6000 rpm and vibration.

[0062] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable the person skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A connection structure for a vibration test of a belt-loaded product for connection with a drive shaft and an input shaft of a product to be tested, comprising an adjusting portion connected with the drive shaft, characterized in that, The adjusting part comprises a first adjusting part and a second adjusting part, The first adjusting part comprises: an outer sleeve with a hollow cylinder; a first flange with a connecting head arranged inside the outer sleeve and a first connecting edge with an outer diameter larger than the connecting head, the first flange is connected with the transmission shaft through the first connecting edge, and the connecting head and the outer sleeve are provided with an adjusting gap in the radial direction; at least three groups of first adjusting members, the number of each group of the first adjusting members is at least two, the first adjusting member comprises an elastic block, one connecting bolt is arranged on each side of the elastic block away from each other, the shanks of the two connecting bolts are arranged away from each other, and the first adjusting member is connected with the outer sleeve and the connecting head through the two connecting bolts respectively, The second adjusting part is used to overcome the axial expansion force of the transmission shaft.

2. The connection structure for a vibration test of a load product according to claim 1, characterized by, A containing groove one for containing part of the elastic block is arranged on the surface of the connecting head close to the outer sleeve, and a containing groove two for containing part of the elastic block is arranged on the area of the outer sleeve opposite to the containing groove one.

3. The connection structure for a vibration test of a load product according to claim 2, characterized by, An installation hole two recessed to the axial center line of the outer sleeve is arranged on the cylinder wall of the outer sleeve, the installation hole two is in communication with the containing groove two, the inner diameter of the installation hole two is larger than the hole diameter of the containing groove two, a stepped structure is formed between the hole bottom of the installation hole two and the containing groove two, the shank part of the connecting bolt of the first adjusting member is located in the installation hole two, a stop piece capable of being sleeved on the connecting bolt is arranged in the installation hole two, and the stop piece is abutted with the stepped structure of the hole bottom of the installation hole two.

4. The connection structure for a vibration test of a load product according to Claim 1, wherein The two connecting bolts of the first adjusting member and the elastic block are an integral part.

5. The connection structure for a vibration test of a load product according to Claim 1, wherein The number of each group of the first adjusting members is two, and each group of the first adjusting members is distributed at the same phase along the circumferential direction of the outer sleeve.

6. The connection structure for a vibration test of a load product according to any one of claims 1 to 5, characterized by The second adjusting part comprises two groups of second adjusting members arranged close to the two mutually distant ends of the transmission shaft, each group of the second adjusting members comprises two U-shaped springs arranged opposite to each other, the diameter direction of the opening of the U-shaped spring is along the length direction of the transmission shaft, and the length direction of the U-shaped spring is perpendicular to the axial direction of the transmission shaft.

7. The connection structure for a vibration test of a band-loaded product according to claim 6, characterized by The two groups of second adjusting members arranged close to the two mutually distant ends of the transmission shaft are arranged at 90 degrees.

8. The connection structure for a vibration test of a band product according to claim 7, wherein A connecting plate for fixing the U-shaped spring is arranged on each outer side of the U-shaped spring, When the connecting structure for the vibration test of the product with load has the first adjusting part and the second adjusting part, two groups of the first adjusting part are connected with the two ends of the transmission shaft, and the connecting plates of two groups of the second adjusting part are arranged on the side of the first adjusting part away from the transmission shaft respectively; When the connecting structure for the vibration test of the product with load only has the second adjusting part, the connecting plates of the second adjusting part are connected with the transmission shaft.

9. A vibration testing system, characterized by, The connecting structure for the vibration test of the product with load comprises any one of claims 1-8.

10. The vibrational testing system of claim 9, wherein, It also comprises an output shaft connected to the transmission shaft through the first adjusting part and / or the second adjusting part, a driving gear is arranged on the output shaft, a driven gear is arranged coaxially on the input shaft of the product to be tested, and the tooth diameter of the driving gear is greater than that of the driven gear.

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