Pin shaft testing device

Abstract

A pin shaft testing device comprises a first installation structure, a second installation structure, a third installation structure, a first supporting structure and a second supporting structure, the first supporting structure is detachably connected to one side of the first installation structure, and the second supporting structure is detachably connected to one side of the second installation structure. The third mounting structure is detachably connected to the other side of the second mounting structure, the third mounting structure is used for being connected with a force application device, the first supporting structure is detachably provided with a first pin shaft supporting part, the second supporting structure is detachably provided with a second pin shaft supporting part, the first pin shaft supporting part and the second pin shaft supporting part are attached to each other, and the first pin shaft supporting part and the second pin shaft supporting part are matched with each other. The first pin shaft supporting part and the second pin shaft supporting part are used for supporting the pin shaft in the direction perpendicular to the axis of the pin shaft. The pin shaft testing device is simple in structure, convenient to assemble and disassemble and small in occupied space, noise generated by friction in the testing process can be reduced conveniently, installation of pin shafts with different diameters can be achieved, and the testing cost is reduced to a great extent.

Description

Technical Field

[0001] The utility model relates to the technical field of pin shaft fatigue testing, in particular to a pin shaft testing device. Background Art

[0002] For boom-type mechanical products, the pins are the connecting parts between the boom sections and the cylinder and the boom, and they mainly bear the shear force, bending moment, torque and pressure caused by the weight of the boom sections. Therefore, the fatigue characteristics of the pins play a vital role in the life and bearing capacity of the structure. These pins will crack and break under cyclic loads, causing major safety accidents. In order to more clearly understand the fatigue characteristics of the pins under cycles, optimize the structural design, and increase the fatigue life of the pins, it is of great significance to conduct pin fatigue tests.

[0003] At present, the fatigue test of pins is mostly carried out with the help of large hydraulic equipment, that is, the hydraulic cylinder is controlled by force or displacement to directly apply cyclic load to the pin. Figure 1 and Figure 2 As shown, the existing pin shaft test device is mainly composed of four parts: a turntable support 1a, a pin shaft handle head 1b, a hydraulic press cylinder adapter seat 1c and a test pin shaft 1d. The test pin shaft 1d is installed in the pin shaft handle head 1b, and the left and right sides are respectively fixed on the turntable support 1a. One end of the hydraulic press cylinder adapter seat 1c is connected to the hydraulic press cylinder, and the other end is connected to the pin shaft handle head 1b. The heavy-load hydraulic press controls the extension and retraction of the hydraulic cylinder through the hydraulic system to realize the loading and unloading of force, thereby achieving the cyclic load of the pin shaft fatigue test.

[0004] The existing test device can only test one pin at a time, which is inefficient and increases the test cost. The sizes of the turntable support and the pin handle are matched with the specific test pin size. When it is necessary to test pins of other sizes, the turntable support and the pin handle of the corresponding size need to be reprocessed. It cannot adapt to pins of various sizes. If it is necessary to test pins of different sizes, the corresponding tooling needs to be reprocessed, which increases the test cost. In addition, the overall size is too large, the test device is not convenient to install and disassemble, it is not convenient to regularly monitor and inspect the pin surface during the test, the lubrication operation is inconvenient, and the noise generated by friction during the test is too loud. Utility Model Content

[0005] In view of this, the utility model provides a pin shaft test device with simple structure, convenient loading and unloading, and small space occupation. The entire pin shaft test device is convenient to place in the oil tank box, and lubrication of each contact part is achieved by lubricating oil immersion, and excessive noise caused by friction during the test is reduced. The first pin shaft support part and the second pin shaft support part can be designed to match the pin shaft diameter to achieve the installation of pin shafts with different diameters, thereby greatly reducing the test cost.

[0006] A pin shaft testing device includes a first mounting structure, a second mounting structure, a third mounting structure, a first supporting structure and a second supporting structure, wherein the first supporting structure is detachably connected to one side of the first mounting structure, the second supporting structure is detachably connected to one side of the second mounting structure, the third mounting structure is detachably connected to the other side of the second mounting structure, the third mounting structure is used to connect a force application device, the first supporting structure is detachably provided with a first pin shaft support portion, the second supporting structure is detachably provided with a second pin shaft support portion, the first pin shaft support portion and the second pin shaft support portion are in contact with each other, and the first pin shaft support portion and the second pin shaft support portion are used to support the pin shaft along an axial direction perpendicular to the pin shaft.

[0007] In one embodiment, the first mounting structure and the second mounting structure are both plate-like structures, the first supporting structure and the second supporting structure both include a plate-like supporting portion, the plate-like supporting portion is attached to the plate-like structure, the first pin shaft supporting portion and the second pin shaft supporting portion both include a first supporting plate fixedly connected to the plate-like supporting portion and a second supporting plate detachably attached to one side of the first supporting plate, the first supporting plate and the second supporting plate are provided with coaxially arranged pin shaft fixing holes, the pin shaft fixing holes are used to support the ends of the pin shafts, and the first supporting structure and the second supporting structure both include two groups.

[0008] In one embodiment, a pin shaft sleeve is provided on the outer periphery of the pin shaft fixing hole on the second supporting plate, and the pin shaft sleeve is passed through the pin shaft fixing hole on the first supporting plate.

[0009] In one embodiment, a reinforcement portion is provided at a connection between the plate-shaped support portion and the first support plate.

[0010] In one embodiment, the first mounting structure and the second mounting structure are respectively provided with a first sliding structure and a second sliding structure, and the first supporting structure and the second supporting structure are respectively slidably connected to the first sliding structure and the second sliding structure.

[0011] In one embodiment, the first sliding structure and the second sliding structure are both sliding grooves, and the first supporting structure and the second supporting structure are both provided with sliding connecting members, and the sliding connecting members are slidably connected to the sliding grooves.

[0012] In one embodiment, the first mounting structure and the second mounting structure each include at least two groups, multiple groups of first mounting structures are sequentially assembled into a first combined mounting structure, multiple groups of second mounting structures are sequentially assembled into a second combined mounting structure, and the third mounting structure is arranged in the central area of ​​the second combined mounting structure.

[0013] In one embodiment, the third mounting structure includes two groups of mounting plates arranged opposite to each other, and a connecting portion is fixedly connected between the two groups of mounting plates.

[0014] In one embodiment, the connecting portion includes connecting plates arranged at intervals.

[0015] In one embodiment, the pin shaft testing device further includes an oil tank box, and the first mounting structure is disposed in the oil tank box.

[0016] The pin shaft test device provided by the utility model has various mounting structures and supporting structures that are assembled to each other in a detachable manner, and the first pin shaft support portion and the second pin shaft support portion fit together to support the pin shaft. The overall structure is simple, and loading and unloading are convenient. It occupies a small space, and the entire pin shaft test device is convenient to place in the oil tank box, and lubrication of various contact parts is achieved through lubricating oil infiltration, and excessive noise caused by friction during the test is reduced. The first pin shaft support portion and the second pin shaft support portion that match can be designed according to the pin shaft diameter, so that pin shafts of different diameters can be installed, thereby greatly reducing the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 The overall structure of an existing pin testing device is schematically shown.

[0019] Figure 2 The cross-sectional structure of an existing pin testing device is schematically shown.

[0020] Figure 3 The main structure of the pin shaft testing device according to the first embodiment of the utility model is schematically shown.

[0021] Figure 4 The overall structure of the pin testing device of the first embodiment of the utility model is schematically shown.

[0022] Figure 5 The overall structure of the pin shaft testing device of the first embodiment of the utility model placed in the oil tank is schematically shown.

[0023] Figure 6 The overall structure of the second installation structure in the first embodiment of the utility model is schematically shown.

[0024] Figure 7 The overall structure of the first installation structure in the first embodiment of the utility model is schematically shown.

[0025] Figure 8 The split structure of the first supporting structure in the embodiment of the utility model is schematically shown.

[0026] Fig. 9 The split structure of the second supporting structure in the embodiment of the utility model is schematically shown.

[0027] Fig.10 The overall structure of the pin testing device of the second embodiment of the utility model is schematically shown. DETAILED DESCRIPTION

[0028] The following will describe in detail a specific embodiment of the utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the description of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present utility model, unless otherwise clearly specified and limited, the terms "disposed", "provided with", "installed", "connected" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] The terms "upper", "one side", "the other side", "side", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the utility model.

[0031] The terms "first", "second", "third" and the like are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0032] The term "comprise", "comprising", or any other variation thereof, is intended to cover a non-exclusive inclusion of elements other than those listed and may also include other elements not expressly listed.

[0033] First embodiment

[0034] like Figure 3 and Figure 4As shown, the pin shaft test device of the first embodiment of the utility model includes a first mounting structure 11, a second mounting structure 12 and a third mounting structure 13, a first supporting structure 14 and a second supporting structure 15, wherein the first supporting structure 14 is detachably connected to one side of the first mounting structure 11 by bolts, the second supporting structure 15 is detachably connected to one side of the second mounting structure 12 by bolts, and the third mounting structure 13 is detachably connected to the other side of the second mounting structure 12 by bolts, and the third mounting structure 13 is used to connect a telescopic force-applying device such as a hydraulic cylinder, a gas cylinder, and an electric cylinder, the first supporting structure 14 is detachably provided with a first pin shaft supporting portion 141, and the second supporting structure 15 is detachably provided with a second pin shaft supporting portion 151, the first pin shaft supporting portion 141 and the second pin shaft supporting portion 151 are in contact with each other, and the first pin shaft supporting portion 141 and the second pin shaft supporting portion 151 are used to support the pin shaft 101 along an axial direction perpendicular to the pin shaft 101.

[0035] like Figure 5 As shown, specifically, in this embodiment, the pin shaft testing device further includes an oil tank box 16 , and the first mounting structure 11 is disposed in the oil tank box 16 .

[0036] According to the pin shaft test device of the first embodiment of the utility model, each mounting structure and supporting structure are assembled with each other in a detachable manner, and the first pin shaft support portion 141 and the second pin shaft support portion 151 fit together to support the pin shaft 101. The overall structure is simple, the processing cost is low, the loading and unloading are convenient, and the space occupied is small. It is convenient to place the entire pin shaft test device in the oil tank box 16, and lubricate each contact part by lubricating oil infiltration, and reduce excessive noise caused by friction during the test. The first pin shaft support portion 141 and the second pin shaft support portion 151 that match each other can be designed according to the diameter of the pin shaft 101 to achieve the installation of pin shafts 101 with different diameters, thereby greatly reducing the test cost.

[0037] like Figure 6 and Figure 7As shown, specifically, in this embodiment, the first mounting structure 11 and the second mounting structure 12 are both plate-like structures, the first supporting structure 14 and the second supporting structure 15 both include a plate-like supporting portion 17, the plate-like supporting portion 17 is respectively attached to the plate-like structure, the first pin shaft supporting portion 141 and the second pin shaft supporting portion 151 respectively include a first supporting plate 18 fixedly connected to the plate-like supporting portion 17 and a second supporting plate 19 detachably attached to one side of the first supporting plate 18, the first supporting plate 18 and the second supporting plate 19 are provided with coaxially arranged pin shaft fixing holes 20, the pin shaft fixing holes 20 are respectively used to support the ends of the pin shaft 101, and the first supporting structure 14 and the second supporting structure 15 both include two groups. The mounting structure and the supporting structure mainly composed of the plate-like structure are assembled together to form the main structure of the pin test device, which greatly simplifies the structure of the pin test device and reduces the occupied space. Moreover, by only replacing the first support plate 18 and the second support plate 19 and matching the first support plate 18 and the second support plate 19 with the pin fixing holes 20 of different inner diameters, it is possible to adapt to pins 101 of various sizes and conduct tests on pins 101 of different sizes, thereby greatly reducing the test cost. In addition, a larger exposed area is provided in the middle area of ​​the pin 101, which can facilitate the detection, monitoring and regular inspection of the surface of the pin 101 by attaching the strain gauge 102 during the test, and the test situation can be observed in real time by the detector 103.

[0038] like Figure 6 and Figure 7 As shown, specifically, in this embodiment, the first mounting structure 11 and the second mounting structure 12 are respectively provided with a first sliding structure 111 and a second sliding structure 121, and the first support structure 14 and the second support structure 15 are respectively slidably connected to the first sliding structure 111 and the second sliding structure 121. Specifically, in this embodiment, the first sliding structure 111 and the second sliding structure 121 are both T-shaped sliding grooves, and the first support structure 14 and the second support structure 15 are both provided with a sliding connector 23, and the sliding connector 23 is slidably connected to the T-shaped sliding groove. Specifically, the plate-like support portion 17 is respectively connected to the first mounting structure 14 and the second mounting structure 15 of the plate-like structure by bolts, and the bolts are invertedly installed in the T-shaped sliding grooves opened on the first mounting structure 14 and the second mounting structure of the plate-like structure, and the distance between the two groups of plate-like support portions 17 can be adjusted to match the installation of pins 101 of different lengths. The plate-like support portion 17 is respectively fixed to the first mounting structure 14 and the second mounting structure 15 of the plate-like structure by installing bolts in the T-shaped grooves to adjust the installation distance, which can adapt to the test of pins of different lengths.

[0039] like Figure 8 and Fig. 9As shown, specifically, in this embodiment, a pin shaft sleeve 21 is provided on the outer periphery of the pin shaft fixing hole 20 on the second supporting plate 19, and the pin shaft sleeve 21 is passed through the pin shaft fixing hole 20 on the first supporting plate 18. Obviously, the two ends of the pin shaft 101 can be well supported by the pin shaft sleeve 21, and the second supporting plate 19 with the pin shaft sleeve 21 can be designed and matched according to the diameter of the pin shaft 101 to realize the installation of pin shafts 101 with different diameters, so as to adapt to the test of pin shafts 101 with different diameters. The first supporting plate 18 is fixed to the second supporting plate 19 by bolts, which can effectively prevent the loosening of the pin shaft sleeve 21 during the test.

[0040] like Figure 8 and Fig. 9 As shown, specifically, in this embodiment, a reinforcing portion 22 is provided at the connection between the plate-like support portion 17 and the first support plate 18. The cross section of the reinforcing portion 22 is triangular, has a simple structure, is easy to process and manufacture, saves materials, and has a greater structural strength.

[0041] like Figures 3 to 5 As shown, specifically, in this embodiment, the third mounting structure 13 includes two groups of mounting plates 131 arranged opposite to each other, and a connecting portion 132 is fixedly connected between the two groups of mounting plates 131. Specifically, in this embodiment, the connecting portion 132 includes a plurality of groups of connecting plates 1321 arranged at even intervals. The third mounting structure 13 mainly having a plate-like structure greatly simplifies the structure of the pin shaft test device, is easy to process and manufacture, is convenient to assemble and disassemble, and has low cost.

[0042] Second embodiment

[0043] like Fig.10 As shown, the pin shaft test device of the second embodiment of the utility model is different from the above-mentioned first embodiment in that: the first mounting structure 11 and the second mounting structure 12 each include at least two groups, multiple groups of first mounting structures 11 are sequentially assembled into a first combined mounting structure 110, multiple groups of second mounting structures 12 are sequentially assembled into a second combined mounting structure 120, and the third mounting structure 13 is arranged in the central area of ​​the second combined mounting structure 120. It is easy to understand that the multiple groups of first mounting structures 11 and the multiple groups of second mounting structures 12 can be integrally formed to form the first combined mounting structure 110 and the second combined mounting structure 120, respectively, or can be sequentially connected to each other in a detachable manner to form the first combined mounting structure 110 and the second combined mounting structure 120.

[0044] The pin shaft test device of the second embodiment of the utility model can increase the number of the first mounting structure 11 and the second mounting structure 12 according to factors such as the size of the test site, so as to increase the number of T-shaped sliding grooves and the number of the first supporting structure 14 and the second supporting structure 15 and the number of second supporting plates 19 with a plurality of pin shaft sleeves 21 of different sizes. By adjusting the distance between the T-shaped sliding grooves corresponding to two adjacent pin shafts 101, the distance from the support point of the pin shaft test device to the third mounting structure 13 can be changed, similar to a simply supported beam with fixed ends, so as to realize the distribution of loads required for tests of different pin shafts 101, and realize the simultaneous conduct of tests of multiple pin shafts of different sizes. It can be combined with factors such as the test site to facilitate the modification of the test device, and can carry out tests of multiple pin shafts of different sizes at the same time, thereby improving the test efficiency.

[0045] It is easy to understand that in this embodiment, a group of third mounting structures 13 can also be set corresponding to each group of first mounting structures 11 and second mounting structures 12, and each group of third mounting structures 13 can be connected to a group of driving devices to synchronously realize the distribution of loads required for testing multiple groups of different pin shafts 101.

[0046] According to the above embodiments, it can be seen that the pin shaft test device involved in the utility model, each mounting structure and the supporting structure are assembled with each other in a detachable manner, and the first pin shaft support part and the second pin shaft support part fit together to support the pin shaft. The overall structure is simple, easy to load and unload, and occupies a small space. It is convenient to place the entire pin shaft test device in the oil tank box, and lubricate each contact part by lubricating oil infiltration, and reduce excessive noise caused by friction during the test. The first pin shaft support part and the second pin shaft support part that match can be designed according to the pin shaft diameter to achieve the installation of pin shafts with different diameters, thereby greatly reducing the test cost.

[0047] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the attached claims.

Claims

1. A pin test device, characterized in that: It comprises a first mounting structure (11), a second mounting structure (12), a third mounting structure (13), a first supporting structure (14) and a second supporting structure (15); wherein: The first supporting structure (14) is detachably connected to one side of the first mounting structure (11), and the second supporting structure (15) is detachably connected to one side of the second mounting structure (12); The third mounting structure (13) is detachably connected to the other side of the second mounting structure (12), and the third mounting structure (13) is used to connect a force applying device; The first supporting structure (14) is detachably provided with a first pin shaft supporting portion (141), and the second supporting structure (15) is detachably provided with a second pin shaft supporting portion (151), the first pin shaft supporting portion (141) and the second pin shaft supporting portion (151) are fitted together, and the first pin shaft supporting portion (141) and the second pin shaft supporting portion (151) are used to support the pin shaft (101) along an axial direction perpendicular to the pin shaft (101).

2. The pin test device according to claim 1, characterized in that: The first mounting structure (11) and the second mounting structure (12) are both plate-like structures, and the first supporting structure (14) and the second supporting structure (15) both comprise a plate-like supporting portion (17), wherein the plate-like supporting portion (17) is attached to the plate-like structure; The first pin shaft supporting portion (141) and the second pin shaft supporting portion (151) both comprise a first supporting plate (18) fixedly connected to the plate-shaped supporting portion (17) and a second supporting plate (19) detachably attached to one side of the first supporting plate (18), the first supporting plate (18) and the second supporting plate (19) being provided with coaxially arranged pin shaft fixing holes (20), the pin shaft fixing holes (20) being used to support the end of the pin shaft (101); The first supporting structure (14) and the second supporting structure (15) each include two groups.

3. The pin test device according to claim 2, characterized in that: A pin shaft sleeve (21) is provided on the outer periphery of the pin shaft fixing hole (20) on the second supporting plate (19), and the pin shaft sleeve (21) is inserted into the pin shaft fixing hole (20) on the first supporting plate (18).

4. The pin test device according to claim 2 or 3, characterized in that: A reinforcing portion (22) is provided at the connection between the plate-shaped supporting portion (17) and the first supporting plate (18).

5. The pin test device according to any one of claims 1 to 3, characterized in that: The first mounting structure (11) and the second mounting structure (12) are respectively provided with a first sliding structure (111) and a second sliding structure (121); the first supporting structure (14) and the second supporting structure (15) are respectively slidably connected to the first sliding structure (111) and the second sliding structure (121).

6. The pin test device according to claim 5, characterized in that: The first sliding structure (111) and the second sliding structure (121) are both sliding grooves, and the first supporting structure (14) and the second supporting structure (15) are both provided with sliding connecting members (23), and the sliding connecting members (23) are slidably connected to the sliding grooves.

7. The pin test device according to any one of claims 1 to 3, characterized in that: The first mounting structure (11) and the second mounting structure (12) each include at least two groups, a plurality of groups of first mounting structures (11) are sequentially assembled into a first combined mounting structure (110), and a plurality of groups of second mounting structures (12) are sequentially assembled into a second combined mounting structure (120); The third mounting structure (13) is arranged in a central area of ​​the second combined mounting structure (120).

8. The pin test device according to any one of claims 1 to 3, characterized in that: The third mounting structure (13) comprises two groups of mounting plates (131) arranged opposite to each other, and a connecting portion (132) is fixedly connected between the two groups of mounting plates (131).

9. The pin test device according to claim 8, characterized in that: The connecting portion (132) comprises connecting plates (1321) arranged at intervals.

10. The pin test device according to any one of claims 1 to 3, characterized in that: The pin shaft testing device also includes an oil tank box (16), and the first mounting structure (11) is arranged in the oil tank box (16).

Images