[0028] To make the object, technical solution and advantages of the present invention more clearly understood, the following will be combined with the accompanying drawings of embodiments of the present invention will be described in detail. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments may be arbitrarily combined with each other.
[0029] The present invention provides the following specific embodiments may be combined with each other, for the same or similar concepts or processes may not be repeated in certain embodiments.
[0030] Figure 1 Schematic structural diagram of a half-bayring fatigue test component provided for embodiments of the present invention. The present embodiment provides a half-snap ring fatigue test component may include: a retaining seat 2, a pulling block 3, a pull plate 4, a positioning pin 5 and a half card ring specimen 1, wherein the half card ring specimen 1 is a radial tangent block of the half card ring.
[0031] as Figure 1 The structure of the half-card ring fatigue test assembly shown in the embodiment of the present invention, the half-card ring specimen 1 may be installed in a combination test apparatus formed by a combination of a fixed seat 2, a pulling block 3, a pull plate 4, a positioning pin 5.
[0032] Figure 2 Schematic structural diagram of a fixed seat provided for an embodiment of the present invention is a half-card ring fatigue test component. See Figure 1 and Figure 2 The structure of the half-card ring fatigue test component shown, the fixing seat 2 in an embodiment of the present invention may be a box structure, one end of which is provided with a hollow structure, the hollow structure for supporting the half-card ring specimen 1, and limiting the axial motion of the half-card ring specimen, thereby simulating the installation of the half-card ring on the hub. as Figure 1 and Figure 2 As shown, the hollow structure is for example disposed at the front end of the fixed seat 2, i.e., the fixed seat 2 is assembled with the pull plate 4 at one end.
[0033] Figure 3 Schematic structural diagram of a pull block provided for an embodiment of the present invention embodiment of the half-card ring fatigue test component, Figure 4 for Figure 3 The example shown provides a right view of the pull block. See Figure 3 and Figure 4 Pull block 3, the pull block 3 in an embodiment of the present invention is a right angle trapezoidal structure, the trapezoidal right angle side side is provided with a pin hole, the pin hole is assembled together with the pin hole on the pull plate in the assembly of the combination test device, the bevel surface of the pull block 3 is provided with a groove, the groove is provided with a boss, the two sides of the groove are used to snap fixed half card ring specimen 1 end, to limit the lateral movement of the half card ring specimen, the boss within the groove is used to apply a load to the half card ring specimen after the pull plate is fitted.
[0034] In the specific implementation, the groove on the beveled surface of the pull block 3 may be a square groove, and the pull block 3 pin hole is used to install the positioning pin 5, and the installation method is described later.
[0035] Figure 5 Schematic structural diagram of a pull plate in a half-bayring fatigue test component provided for embodiments of the present invention. See Figure 1 and Figure 5 As shown, one end of the pull plate 4 in an embodiment of the present invention is provided with a double pull ear structure, the double pull ear structure is two pieces of pull ear, the middle of the two pieces of pull ear is a hollow structure; further, the front end of the double pull ear structure is provided with a pin hole, the double pull ear structure of the pull plate 4 penetrates into the hollow structure of the fixing seat 2, and the pull block 3 card is closed in the hollow area of the double pull ear structure, so that the positioning pin 5 passes through the pin hole of the double pull ear structure and the pin hole of the pull block. In an embodiment of the present invention, the double pull-ear structure of the pull plate 4 is a force application site of the fatigue test.
[0036] In a particular embodiment, the drawing plate 4 of the embodiment of the present invention may be a cuboid structure, and the cross-section of the double pull-ear structure is smaller than the cross-section of the other end of the box; the pinhole in the double-pull-ear structure is also used to install the positioning pin 5, since the middle of the two pieces of pull-ear is a hollow structure, when installing through the two sides of the fixed seat 1 and the pulling block 3, the pin hole on the pull plate 4 is aligned with the pin hole on the pull block 3, and then the positioning pin 5 is installed in the pin hole. In this way, the assembly of the combined test device and the half-loop specimen is completed, forming a half-card ring fatigue test component that can be used for fatigue testing.
[0037] Optionally, such as Figure 1 and Figure 2 As shown, the fixing seat 2 in an embodiment of the present invention may be provided as a box structure, and the hollow structure within the fixing seat may be processed according to the shape of the hub card ring groove. as Figure 6 as shown Figure 2 The embodiment shown provides a right view of the fixed seat, wherein the section of the empty structure is an I-shape.
[0038] Optionally, such as Figure 1 As shown, in an embodiment of the present invention, the transfer rounded corner of the half-card ring specimen 1 has a convex part at one end, the lower end surface of the hollow structure within the fixed seat 2 is provided with a notch, the notch for the convex part of the half-card ring specimen 1 is limited therein, thereby simulating the installation mode of the half-card ring on the hub, supporting the half-card ring specimen, and limiting the axial motion of the half-card ring specimen.
[0039] Optionally, Figure 7 Schematic structural diagram of a positioning pin provided for an embodiment of the present invention is a half-bay ring fatigue test component. The structure of the positioning pin 5 in an embodiment of the present invention matches the pin hole in the pull block 3 and the pin hole in the pull plate 4, for example, the positioning pin 5 is a cylindrical structure for fixing the pull block 3 and the pull plate 4, and the tensile force on the pull plate is transmitted to the pull block, thereby realizing a simulated fatigue test.
[0040] In an embodiment of the present invention, after the pull block 3 is assembled with the half-card ring specimen 1 and the pull plate 4, the cam in the groove of the pull block 3 is against one end of the half-card ring specimen 1, the boss is the loading point for applying a load to the half-card ring specimen during the fatigue test, to simulate the direction of the combined force of the tire expansion force and the vertical load applied by the half-card ring.
[0041] Embodiments of the present invention for the brake wheel half-card ring weak link, that is, the rounded angle at the transfer, and combined with the force model of the half-card ring on the wheel assembly, designed a half-card ring fatigue test component and the corresponding fatigue test device, the shape of the half-card ring specimen is a half-card ring drawing structure cross-section shape, that is, according to the half-card ring drawing structure and the actual production process processed into a half-card ring shape, and then cut off the interception specimen; subsequently, the simulation of the installation mode of the half-card ring on the wheel, The snap ring is installed on the combined test device to form a half-snap ring fatigue test component, and the force is loaded according to the actual force direction to simulate the alternating load of the half snap ring for tensile-pull fatigue test. Embodiments of the present invention provides test components and apparatus, according to the different cross-sectional thickness of the half-card ring specimen, apply different loads and frequencies, test out different sizes of fillets and structures of the half-card ring specimen cycle times, determine the fatigue life of different structures of the half-loop; so as to achieve not only shorten the test cycle, but also can reduce the effect of manufacturing costs, improve the solution cycle of the half-loop fatigue problem.
[0042] Since the above embodiment of the present application provides a half-loop fatigue test component after the completion of assembly, to use a fatigue testing machine to pull - pull fatigue test, so that one end of the half-card ring fatigue test component is connected to the connection screw on the side of the fatigue testing machine, the other end is connected to the connection screw on the other side of the fatigue testing machine.
[0043] In one embodiment of the present invention embodiment, such as Figure 1 and Figure 2 As shown, the rear end of the fixing seat 2 (the rear end may be the other end corresponding to one end of the hollow structure provided above) is provided with a bolt hole for connecting the screw on the side of the fatigue testing machine to the fatigue testing machine, and the bolt hole size can be adjusted according to the different connection screws.
[0044] In one embodiment of the present invention embodiment, such as Figure 1 and Figure 5 As shown, the rear end of the pull plate 4 (the other end may be another end corresponding to the above-described setting has a double pull-ear structure) is provided with a bolt hole for connecting the fatigue testing machine by installing the connection screw on the other side of the fatigue testing machine, and the bolt hole size can be adjusted according to the different connection screws.
[0045] Based on the above embodiments of the present invention provided half-loop fatigue test components, embodiments of the present invention further provide a fatigue test apparatus, the fatigue test apparatus may comprise: a fatigue testing machine, respectively, disposed on both sides of the fatigue testing machine connecting screws, and a half-loop fatigue test component, the half-loop fatigue test component may be a half-loop fatigue test component provided by any of the above embodiments of the present invention.
[0046] One end of the assembled half-snap ring fatigue test assembly is connected to the connecting screw on one side of the fatigue testing machine and the other end is connected to the connecting screw on the other side of the fatigue testing machine. Figure 8 Schematic diagram of a fatigue test for a half-bayring fatigue test component provided using an embodiment of the present invention, Figure 8 The direction of the loading force in the half-snap ring fatigue test is shown. Figure 9 Is a schematic structural diagram of a half-card ring in an embodiment of the present invention, Figure 10 is right Figure 9 Schematic diagram of sampling the half-card ring shown in the embodiment of the present invention, the half-card ring specimen 1 is connected to the connecting screw on the fatigue testing machine to carry out the pull - pull fatigue test, the specific implementation is: the half card ring specimen 1 is placed in the card ring slot of the fixed seat 2, and then the pull block 3 sets on the outside of the half card ring specimen, the pin hole on the pull plate 4 is aligned with the pin hole on the pull block 3, and then the positioning pin 5 is loaded into the pin hole aligned with the pull block 3 and the pull plate 4 aligned pin hole, Finally, the threaded hole on the holder 2 and the M24 threaded hole on the pull plate 4 are connected to the connecting screw on the high-frequency fatigue testing machine, respectively. The pull-pull fatigue test is carried out on a high-frequency fatigue testing machine, and the thickness of the half-snap ring specimen is selected as 15mm, press Figure 8 The load direction shown by the middle arrow applies a fatigue load, a sine waveform, a frequency f= 120-150Hz, a stress ratio of 0.1 to maintain the maximum load and a minimum load, and a test temperature of room temperature and a load of 24KN. It should be noted that according to the thickness of the half-card ring specimen 1 and the parameters of the fatigue testing machine, the appropriate loading force and loading frequency can be selected for the tensile-pull fatigue test, and the fatigue life of the half-card ring can be finally determined.
[0047] Although the embodiments disclosed in the present invention are as described above, the content is only an embodiment of the present invention is used to facilitate the understanding of the present invention, and is not intended to qualify the present invention. Any person skilled in the art to which the invention belongs, without departing from the spirit and scope disclosed in the invention, may make any modifications and changes in the form and details of the implementation, provided that the scope of patent protection of the invention shall still be subject to the scope defined in the appended claims.
