Clamp structure and tensile fatigue testing device

Abstract

The utility model discloses a clamp structure and a tensile fatigue testing device, and relates to the technical field of material performance tests.The clamp structure comprises a mounting seat, and a groove structure is arranged on the mounting seat; the two clamping pieces are symmetrically arranged in the groove structure; the driving structure comprises a first connecting piece and a second connecting piece, the first connecting piece is rotationally arranged on the mounting base, the second connecting piece is arranged in the groove structure, the second connecting piece can slide from one end of the groove structure to the other end of the groove structure, the second connecting piece is movably connected with the clamping piece, and the first connecting piece and the second connecting piece are connected through a first transmission structure; the first transmission structure is used for converting rotation of the first connecting piece into linear motion of the second connecting piece, and in the process that the two clamping pieces move along with the second connecting piece, the groove structure can make the two clamping pieces close to each other oppositely. The whole clamp structure is humanized in design and convenient to operate, the two clamping pieces can be close to each other in the opposite direction only by rotating the first connecting piece, and the to-be-tested piece is rapidly clamped and fixed.

Description

Technical Field

[0001] This application relates to the field of material performance testing technology, and in particular to a fixture structure and a tensile fatigue testing device. Background Technology

[0002] Flexural fatigue and tensile fatigue are two common forms of fatigue loads in engineering. When subjected to flexural or tensile fatigue loads, the mechanical properties of a structure will continuously degrade under alternating and repeated flexural or tensile loads until the structure / component or its constituent materials fail due to fatigue.

[0003] The existing fixtures for tensile fatigue testing are not user-friendly, are inconvenient to operate, and cannot achieve quick and effective clamping. Utility Model Content

[0004] This application aims to solve one of the aforementioned technical problems in the prior art. To this end, a first aspect of this application provides a clamping structure.

[0005] A second aspect of this application also provides a tensile fatigue testing device.

[0006] According to a first aspect of this application, a clamping structure is provided, including...

[0007] Mounting base, wherein a groove structure is provided on the mounting base;

[0008] Two clamping components are symmetrically arranged in the groove structure;

[0009] The driving structure includes a first connector and a second connector. The first connector is rotatably disposed on the mounting base, and the second connector is disposed on the groove structure. The second connector is slidable from one end of the groove structure to the other end. The second connector is movably connected to the clamping member. The first connector and the second connector are connected by a first transmission structure. The first transmission structure is used to convert the rotation of the first connector into the linear motion of the second connector. During the movement of the two clamping members following the second connector, the groove structure enables the two clamping members to move closer to each other.

[0010] The aforementioned clamping structure has at least the following beneficial effects: When the clamping structure of this application is used for tensile fatigue testing of the workpiece, rotating the first connecting member causes the second connecting member to slide linearly under the action of the first transmission structure, simultaneously causing the two clamping pieces to disengage from the restriction of the groove structure, facilitating the placement of the workpiece between the two clamping pieces. After the workpiece is placed, rotating the first connecting member in the opposite direction causes the second connecting member to move the two clamping pieces until they abut against the groove wall of the groove structure. Guided by the groove structure, the two clamping pieces move closer together to clamp the workpiece placed between them. The entire clamping structure is ergonomically designed and easy to operate; simply rotating the first connecting member is sufficient to bring the two clamping pieces closer together, achieving rapid clamping and fixation of the workpiece.

[0011] According to the clamp structure described in the first aspect of this application, the first transmission structure includes meshing annular teeth and a rack, the annular teeth being disposed at the end of the first connecting member, and the rack being disposed at the second connecting member.

[0012] According to the clamp structure described in the first aspect of this application, the second connecting member includes a pushing part, and a groove is provided on the opposite side of both clamps. At least a portion of the pushing part is located in the groove, and during the movement of the second connecting member, the pushing part abuts against the groove wall.

[0013] According to the clamp structure described in the first aspect of this application, the second connecting member further includes a rod portion, and the end of the clamp is provided with a notch communicating with the groove, and the rod portion passes through the notch to connect with the pushing portion.

[0014] According to the clamping structure described in the first aspect of this application, the width of the groove structure gradually increases or decreases from one end to the other, wherein the second connecting member is closer to the end of the groove structure with a larger groove segment.

[0015] According to the clamp structure described in the first aspect of this application, both clamps have raised protrusions arranged in a grid or array on their opposite sides.

[0016] According to the clamp structure described in the first aspect embodiment of this application, a groove is formed on a portion of the end face of the mounting base, the groove extends to the side of the mounting base, and the groove forms the groove structure.

[0017] According to the clamping structure described in the first aspect of this application, a detachable limiting block is provided at the opening of the channel, and the limiting block is used to restrict the clamp from disengaging from the channel.

[0018] According to a second aspect of this application, a tensile fatigue testing device is provided, including...

[0019] A drive assembly includes a drive component and a transmission component, wherein the drive component is connected to the transmission component via a second transmission structure, so that the transmission component can perform linear reciprocating motion.

[0020] Two clamping structures as described above, one of which is fixedly installed, and the other of which is installed at the end of the transmission member.

[0021] According to the tensile fatigue testing device of the second aspect of this application, the tensile fatigue testing device further includes a test chamber, the fixture structure is disposed in the test chamber, and the temperature and humidity of the test chamber are adjustable.

[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0023] The present application will be further described below with reference to the accompanying drawings and embodiments;

[0024] Figure 1 This is a schematic diagram of the tensile fatigue testing device according to an embodiment of this application. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the tensile fatigue testing device according to an embodiment of this application. Figure 2 ;

[0026] Figure 3 This is a schematic diagram of the tensile fatigue testing device according to an embodiment of this application. Figure 3 ;

[0027] Figure 4 This is a schematic diagram of the tensile fatigue testing device according to an embodiment of this application. Figure 4 ;

[0028] Figure 5 This is a schematic diagram of the tensile fatigue testing device according to an embodiment of this application. Figure 5 ;

[0029] Figure 6 This is a schematic diagram of the fixture structure in the embodiments of this application. Figure 1 ;

[0030] Figure 7 This is a schematic diagram of the fixture structure in the embodiments of this application. Figure 2 ;

[0031] Figure 8 This is a schematic diagram of the fixture structure in the embodiments of this application. Figure 3 ;

[0032] Figure 9This is a schematic diagram of the fixture structure in the embodiments of this application. Figure 4 .

[0033] Reference numerals: Test box 100, base frame 101, first housing 110, drive component 120, second transmission structure 130, transmission component 140, mating hole 141, second through hole 142, flange 143, bending fatigue test fixture 200, fixing component 210, first connecting plate 221, second connecting plate 222, third connecting plate 230, fixture structure 300, mounting base 310, groove structure 311, limiting block 312, connecting flange 320, mating part 321, first connecting component 330, ring tooth 331, pushing part 341, rod part 342, clamp 350, groove 351, mesh 352. Detailed Implementation

[0034] This section will describe in detail the specific embodiments of this application. Preferred embodiments of this application are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of this application, but they should not be construed as limiting the scope of protection of this application.

[0035] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0036] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0037] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0038] Reference Figures 1 to 5 The tensile fatigue testing device provided in this application includes a drive assembly and two clamping structures 300.

[0039] The drive component 120 is connected to the transmission component 140 through the first transmission structure, so that the transmission component 140 can perform linear reciprocating motion.

[0040] Of the two clamping structures 300, one clamping structure 300 is fixedly installed, and the other clamping structure 300 is installed at the end of the transmission member 140.

[0041] In use, the two ends of the test piece are clamped and fixed by the clamping structure 300, and the driving component 120 drives the transmission component 140 to perform linear reciprocating motion through the second transmission structure 130, applying an alternating force or displacement to the test piece, thereby enabling tensile fatigue testing.

[0042] In this embodiment, the driving component 120 is a motor, and the second transmission structure 130 is a lead screw structure. The motor is connected to the lead screw structure via a coupling or a synchronous pulley and belt structure, and the transmission component 140 is fixed to the lead screw nut of the lead screw structure. The rotation of the motor is converted into the linear reciprocating motion of the lead screw nut by the forward and reverse rotation of the motor and the lead screw structure.

[0043] In some embodiments, a force sensor is provided on the transmission component 140 to make the test more accurate so that the tensile force can be tested.

[0044] In some embodiments, the tensile fatigue testing structure of this application further includes a test chamber 100, a fixture structure 300 disposed in the test chamber 100, and the temperature and humidity of the test chamber 100 are adjustable.

[0045] In a specific embodiment, the test chamber 100 includes a refrigeration unit and a heater. The refrigeration unit and heater generate cold and hot air respectively, which are then delivered into the test chamber 100 through pipes and air inlets. The air outlet of the test chamber 100 discharges air from the chamber, creating air circulation within the chamber to maintain a stable and safe air pressure while meeting the requirements for temperature uniformity inside the chamber. The ambient temperature and humidity settings can be configured on the temperature and humidity setting interface, and temperature and humidity sensors can record the temperature and humidity inside the test chamber 100 in real time.

[0046] In some embodiments, such as Figure 1 , 2 As shown in Figures 4 and 5, the tensile fatigue testing device of this application may further include a bending fatigue testing fixture 200, which may be disposed inside the test box 100. The bending fatigue testing fixture 200 includes a fixing member 210, a first clamping structure, and a second clamping structure.

[0047] The fixing member 210 is vertically arranged and located between the two clamping structures 300. The setting of the fixing member 210 does not affect the tensile fatigue test. The first clamping structure is set on the fixing member 210 with adjustable position. Specifically, the fixing member 210 is provided with several screw holes at intervals along the vertical direction. The first clamping structure is connected to the screw holes by bolts. The position adjustment of the first clamping structure is achieved by fixing the first clamping structure to different screw holes.

[0048] The first clamping mechanism includes a first connecting plate 221 and a second connecting member. The first connecting plate 221 is connected to a bolt hole, and the second connecting plate 222 is connected to the first connecting plate 221 by bolts, so that the test piece placed between the first connecting plate 221 and the second connecting plate 222 can be clamped.

[0049] The second clamping structure includes two third connecting plates 230, which are connected by bolts. When a bending fatigue test is required on the test piece, the clamping structure 300 on the transmission component 140 is removed, and the second clamping structure is fixed to the transmission component 140. The driving component 120 drives the transmission component 140 to perform linear reciprocating motion through the second transmission structure 130, applying an alternating force or displacement to the test piece, thereby achieving the bending fatigue test. It should be noted that the transmission component 140 is horizontally positioned.

[0050] In some embodiments, the tensile fatigue testing device of this application further includes a first housing 110 and a base frame 101, with the clamping structure 300 and the test box 100 both fixed to the base frame 101, and the first housing 110 used for dust protection of the drive components.

[0051] In some embodiments, the test chamber 100 also includes an openable door structure.

[0052] In some embodiments, such as Figures 6 to 9 As shown, the clamping structure 300 provided in this application includes a mounting base 310, two clamping members 350, and a driving structure.

[0053] The mounting base 310 is provided with a groove structure 311, and two clamping members 350 are symmetrically arranged in the groove structure 311. The two clamping members 350 can move in the groove structure 311. The movement here is not limited to moving closer or further away from each other, or the translation of the two clamping members 350.

[0054] The drive structure includes a first connector 330 and a second connector. The first connector 330 is rotatably mounted on the mounting base 310, and the second connector is mounted on the groove structure 311. The second connector can slide from one end of the groove structure 311 to the other end. The second connector is movably connected to the clamping member 350. The first connector 330 and the second connector are connected by a first transmission structure. The first transmission structure is used to convert the rotation of the first connector 330 into the linear motion of the second connector. During the movement of the two clamping members 350 following the second connector, the groove structure 311 can make the two clamping members 350 move closer to each other.

[0055] When the clamping structure 300 of this application is used for tensile fatigue testing of the test piece, rotating the first connecting member 330 causes the second connecting member to slide linearly under the action of the first transmission structure. Simultaneously, this causes the two clamping members 350 to disengage from the groove structure 311, creating space between them for the test piece to be placed. After the test piece is placed, rotating the first connecting member 330 in the opposite direction causes the second connecting member to move the two clamping members 350 until they abut against the groove wall of the groove structure 311. Guided by the groove structure 311, the two clamping members 350 move closer together to clamp the test piece placed between them. The entire clamping structure 300 is ergonomically designed and easy to operate; simply rotating the first connecting member 330 is sufficient to bring the two clamping members 350 closer together, achieving rapid clamping and fixation of the test piece.

[0056] In some embodiments, such as Figure 7 and Figure 8 As shown, the first transmission structure includes a meshing annular tooth 331 and a rack. The annular tooth 331 is disposed at the end of the first connecting member 330, and the rack is disposed at the second connecting member. The center of the annular tooth 331 is the rotation center of the first connecting member 330. By rotating the first connecting member 330, the annular tooth 331 is driven to rotate, and the rack is driven to perform linear motion through gear transmission.

[0057] In some embodiments, such as Figures 6 to 9 As shown, the second connector includes a pushing part 341. Both clamping parts 350 have a groove 351 on their opposite sides. At least a portion of the pushing part 341 is located in the groove 351. During the movement of the second connector, the pushing part abuts against the groove wall of the groove 351, thereby enabling the clamping parts 350 to move with the pushing part. In conjunction with the implementation of the groove structure 311, the two clamping parts 350 are controlled to move closer to each other and clamp the test piece.

[0058] In some embodiments, such as Figure 7 and Figure 8As shown, the second connector also includes a rod 342. The end of the clamp 350 is provided with a notch for communicating with the groove 351. The rod 342 passes through the notch and connects to the push part 341. The notch is provided so that the rod 342 does not affect the two clamps 350 from approaching and fitting together.

[0059] like Figure 9 As shown, from one end of the groove structure 311 to the other end, the groove width of the groove structure 311 gradually increases and decreases. The second connector is close to the end of the groove structure 311 with a larger groove section. This groove structure 311 is designed so that during the tensile test, the linear reciprocating motion of the second connector can control the two clamping pieces 350 to move closer to each other and clamp the test piece.

[0060] In addition, during the tensile test, as the test piece is stretched, the friction causes the clamp 350 to move toward the end of the groove structure 311 with a smaller groove width, which allows the two clamps 350 to clamp the test piece more firmly, making the test smoother.

[0061] In some embodiments, such as Figure 8 As shown, both clamping members 350 have a textured surface 352 or an array of protrusions on their opposite sides. The textured surface 352 or the protrusions can increase the friction with the workpiece under test, effectively improving the clamping capacity of the clamping members 350.

[0062] In some embodiments, such as Figure 9 As shown, a groove is formed on a portion of the end face of the mounting base 310, extending to the side of the mounting base 310, forming a groove structure 311. This groove structure 311 is easy to manufacture.

[0063] In some embodiments, a detachable limiting block 312 is provided at the opening of the channel. The limiting block 312 is used to restrict the clamp 350 from leaving the channel, effectively preventing the clamp 350 from leaving the test piece during the tensile fatigue test and thus affecting the test of the test piece.

[0064] In some specific embodiments, the clamp structure 300 is detachably connected to the transmission component 140, making disassembly and assembly more convenient.

[0065] Specifically, such as Figures 6 to 9As shown, the clamp structure 300 of this application also includes a connecting flange 320, which is fixed to the mounting base 310. The connecting flange 320 also has a mating part 321, on which a first through hole is provided. The end of the transmission member 140 is provided with a mating hole 141 in the axial direction, and the end of the transmission clamp 350 is provided with a second through hole 142 in the radial direction. The second through hole 142 communicates with the mating hole 141. After the mating part 321 is inserted into the mating hole 141, the first through hole can be rotated to face the second through hole 142. By providing a pin in the first through hole and the second through hole 142, the connecting flange 320 can be disengaged from the transmission member 140 in the directional direction.

[0066] The connection structure of the connecting flange 320 and the transmission component 140 makes it easy to assemble and disassemble the clamp structure 300 and the transmission component 140.

[0067] To make the connection between the transmission component 140 and the connecting flange 320 more secure, a flange portion 143 is provided at the end of the transmission component 140, and the flange portion 143 is connected to the connecting flange 320 by bolts.

[0068] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A clamp structure, characterized in that: include Mounting base, wherein a groove structure is provided on the mounting base; Two clamping components are symmetrically arranged in the groove structure; The driving structure includes a first connector and a second connector. The first connector is rotatably disposed on the mounting base, and the second connector is disposed on the groove structure. The second connector is slidable from one end of the groove structure to the other end. The second connector is movably connected to the clamping member. The first connector and the second connector are connected by a first transmission structure. The first transmission structure is used to convert the rotation of the first connector into the linear motion of the second connector. During the movement of the two clamping members following the second connector, the groove structure enables the two clamping members to move closer to each other.

2. The clamp structure according to claim 1, characterized in that: The first transmission structure includes meshing annular teeth and a rack, the annular teeth being disposed at the end of the first connecting member and the rack being disposed at the second connecting member.

3. The clamp structure according to claim 1, characterized in that: The second connector includes a pushing part, and a groove is provided on the opposite side of both clamps. At least a portion of the pushing part is located in the groove. During the movement of the second connector, the pushing part abuts against the groove wall.

4. The clamp structure according to claim 3, characterized in that: The second connector also includes a rod portion, and the end of the clamp is provided with a notch communicating with the groove, and the rod portion passes through the notch to connect to the push portion.

5. The clamp structure according to claim 1, characterized in that: From one end of the groove structure to the other end, the groove width of the groove structure gradually increases and decreases, wherein the second connector is closer to the end of the groove structure with a larger groove segment.

6. The clamp structure according to claim 1, characterized in that: Both clamps have raised protrusions arranged in a grid or array on their opposite sides.

7. The clamp structure according to claim 1, characterized in that: A groove is formed on a portion of the end face of the mounting base, the groove extends to the side of the mounting base, and the groove forms the groove structure.

8. The clamp structure according to claim 7, characterized in that: A detachable limiting block is provided at the opening of the channel, and the limiting block is used to prevent the clamp from detaching from the channel.

9. A tensile fatigue testing device, characterized in that: include A drive assembly includes a drive component and a transmission component, wherein the drive component is connected to the transmission component via a second transmission structure, so that the transmission component can perform linear reciprocating motion. The clamping structure according to any one of claims 1 to 8, wherein one clamping structure is fixedly disposed and the other clamping structure is disposed at the end of the transmission member.

10. The tensile fatigue testing device according to claim 9, characterized in that: The tensile fatigue testing device also includes a test chamber, and the fixture structure is disposed in the test chamber. The temperature and humidity of the test chamber are adjustable.

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