Clamping device for longitudinal detection of automobile crankshaft

Abstract

The invention relates to the technical field of automobile crankshaft performance test instruments, and provides a clamping device for longitudinal detection of an automobile crankshaft, the clamping device comprises a clamping support piece, a push-pull connecting piece, a push-pull shaft, a fixed seat, a heating cylinder and a top cover, the top cover is fixedly arranged at the top of the heating cylinder, and the clamping support piece is coaxially assembled in a cavity between the top cover and the inner side of the heating cylinder; the push-pull shaft is coaxially arranged below the clamping supporting piece, the upper portion of the push-pull connecting piece is assembled at the bottom of the heating cylinder and fixedly connected with the bottom of the clamping supporting piece, the lower portion of the push-pull connecting piece is fixedly connected with the push-pull shaft, and the fixing base is coaxially arranged on the outer side of the heating cylinder. And the clamping supporting piece, the heating cylinder and the top cover can synchronously and axially move. According to the clamping device for longitudinal detection of the automobile crankshaft, the efficiency and accuracy of mechanical property detection of the crankshaft can be improved, and more comprehensive performance evaluation is provided by simulating real application conditions.

Description

Technical Field

[0001] The present application relates to the technical field of automobile crankshaft performance testing instruments, and in particular to a clamping device for longitudinal detection of automobile crankshafts. Background Art

[0002] With the rapid development of the automobile industry, the reliability and performance requirements of automobile parts are getting higher and higher. As one of the key components of automobile engines, the mechanical properties of the crankshaft directly affect the working performance and life of the engine. Therefore, it is particularly important to accurately test the mechanical properties of the crankshaft.

[0003] However, in the existing technology, the mechanical detection of crankshafts has the following problems: 1. Insufficient clamping accuracy: Insufficient clamping accuracy of the crankshaft is a common problem during mechanical testing. Due to the accuracy and stability limitations of the clamping device, the crankshaft may be displaced or rotated during the test, resulting in inaccurate test results. This not only affects the reliability of the test results, but may also cause damage to the crankshaft itself.

[0004] 2. Complex testing process: Different mechanical property tests often require the use of different fixtures and equipment. For example, mechanical property tests such as tension, compression, bending and torsion require specific fixtures and equipment to fix and apply force. This diversity leads to the complexity and cost of the testing process, and also increases the difficulty of operation.

[0005] 3. Limitations of multi-dimensional performance cycle tests: Existing testing technology cannot perform multi-dimensional performance cycle tests on the same part. This means that the crankshaft may show good performance in a single-dimensional test, but in actual applications, due to the action of multi-dimensional forces, its performance may be significantly different from the test results. For example, in actual applications, the crankshaft may be subjected to alternating pressure and tension periodically, and may even be affected by temperature at the same time. This difference leads to a huge difference between the test simulation scenario and the actual application scenario, which affects the actual application effect and life prediction of the crankshaft.

[0006] Therefore, how to provide a clamping device for automobile crankshaft inspection that can improve clamping accuracy, reduce the types of inspection equipment and fixtures, and realize multi-dimensional performance cycle testing on the same part, thereby truly simulating actual application scenarios and providing more accurate and comprehensive inspection results to improve the performance and reliability of the crankshaft has become a technical problem that needs to be solved urgently. Summary of the invention

[0007] In view of this, in order to overcome the deficiencies of the prior art, the present application aims to provide a clamping device for longitudinal detection of an automobile crankshaft.

[0008] The present application provides a clamping device for longitudinal detection of an automobile crankshaft, the device comprising a clamping support, a push-pull connecting member, a push-pull shaft, a fixing seat, a heating cylinder and a top cover, wherein the top cover is fixedly arranged on the top of the heating cylinder, the clamping support is coaxially assembled in a cavity between the top cover and the inner side of the heating cylinder, the push-pull shaft is coaxially arranged below the clamping support, the upper part of the push-pull connecting member is assembled on the bottom of the heating cylinder and fixedly connected to the bottom of the clamping support, the lower part of the push-pull connecting member is fixedly connected to the push-pull shaft, and the fixing seat is coaxially arranged on the outer side of the heating cylinder, and when the push-pull shaft is moved longitudinally, the clamping support, the heating cylinder and the top cover can be synchronously moved axially.

[0009] Optionally, in the clamping device for longitudinal inspection of an automobile crankshaft of the present application, the clamping support member includes a support seat, a clamping cylinder, a clamping head, and a support column integrally connected from bottom to top and arranged integrally on the upper part of the support seat and coaxially arranged on the inner side of the clamping cylinder, a plurality of positioning holes are arranged on the upper circumference of the support seat, and a plurality of fixing grooves are arranged on the lower circumference of the support seat.

[0010] Optionally, in the clamping device for longitudinal inspection of an automobile crankshaft of the present application, the outer diameter of the clamping head increases sequentially from bottom to top, and a plurality of through curved grooves are arranged on the circumference of the clamping head.

[0011] Optionally, in the clamping device for longitudinal detection of an automobile crankshaft of the present application, the push-pull connector includes, from bottom to top, an integrally connected push-pull connector bottom, a push-pull connector side, and a push-pull connector top, an axial hole is coaxially arranged on the inner side of the push-pull connector bottom, a plurality of first fastening holes are coaxially arranged on the outer side of the axial hole, the top of the push-pull connector is an annular protrusion extending toward the inner side of the push-pull connector side, and a plurality of positioning protrusions are integrally arranged on the bottom of the top of the push-pull connector, and the positioning protrusions match the positioning holes of the clamping support.

[0012] Optionally, in the clamping device for longitudinal detection of an automobile crankshaft of the present application, the push-pull shaft includes a push-pull shaft body, a first annular portion arranged in the middle of the push-pull shaft body, and a second annular portion arranged at the top of the push-pull shaft body, a plurality of second fastening holes are arranged on the upper circumference of the first annular portion, the second fastening holes match the first fastening holes of the push-pull connector, a plurality of fixing protrusions are arranged on the top circumference of the second annular portion, the fixing protrusions match the fixing grooves of the clamping support.

[0013] Optionally, in the clamping device for longitudinal detection of an automobile crankshaft of the present application, the fixing seat includes an annular fastening base and a fixing cylinder integrally connected to the annular fastening base, a plurality of slide grooves are annularly arranged on the inner wall of the fixing cylinder, two through grooves are symmetrically arranged on the fixing cylinder, and a plurality of third fastening holes are circumferentially arranged on the annular fastening base.

[0014] Optionally, in the clamping device for longitudinal detection of an automobile crankshaft of the present application, the heating cylinder includes a heating cylinder body which is a rotating body as a whole, a clamping cylinder assembly cavity is coaxially arranged inside the heating cylinder body, a spiral channel is arranged on the heating cylinder body outside the clamping cylinder assembly cavity, two DC channels are symmetrically arranged on the heating cylinder body, the DC channels are connected to the spiral channels, an annular push-pull connection piece assembly cavity is coaxially arranged on the inner side of the bottom of the heating cylinder body, a first sealing groove and a second sealing groove are coaxially arranged from the inside to the outside on the top of the heating cylinder body, and a plurality of fourth fastening holes are arranged on the top circumference of the heating cylinder body.

[0015] Optionally, in the clamping device for longitudinal detection of an automobile crankshaft of the present application, a plurality of slide rail protrusions are provided on the outer circumference of the heating cylinder body, and the slide rail protrusions match the slide grooves of the fixing seat.

[0016] Optionally, in the clamping device for longitudinal inspection of an automobile crankshaft of the present application, the top cover as a whole is a rotating body, and a connected workpiece hole and a clamping head assembly cavity are coaxially arranged on the inner side of the top cover from top to bottom, the clamping head assembly cavity matches the shape of the clamping head, and a third sealing groove is coaxially arranged on the bottom of the top cover, and the third sealing groove matches the second sealing groove on the top of the heating cylinder, and a plurality of fifth fastening holes are coaxially arranged on the top cover, and the fifth fastening hole matches the fourth fastening hole on the top of the heating cylinder.

[0017] Optionally, in the clamping device for longitudinal inspection of an automobile crankshaft of the present application, a plurality of annular heat storage tanks are coaxially arranged from top to bottom on the inner side of the top cover, and the open ends of the heat storage tanks are connected to the assembly cavity of the clamping head.

[0018] The clamping device for longitudinal detection of automobile crankshafts of the present application has the following beneficial technical effects: 1. It can realize the longitudinal stretching and longitudinal pressure clamping of the crankshaft on the basis of one clamping, which significantly simplifies the detection process and completes the detection of multiple mechanical properties in the same clamping, without the need to frequently replace the fixture or re-clamp the crankshaft, thereby improving the detection efficiency and accuracy; 2. It can provide temperature simulation conditions for the workpiece in mechanical property testing through heating and temperature control, so that the testing device can simulate the mechanical properties at different temperatures and further restore the real application conditions in multiple dimensions; 3. Easy assembly and disassembly, reducing the preparation time before testing and the cleaning time after testing, improving the overall work efficiency, and also reducing the equipment loss caused by frequent clamping and disassembly; 4. Stable clamping and high clamping accuracy can ensure the accurate position of the crankshaft during the detection process, avoid detection errors caused by improper clamping, improve the reliability and repeatability of the detection results, and ensure the accuracy of the detection data. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is an exploded structural example diagram of a clamping device for longitudinal detection of an automobile crankshaft according to an embodiment of the application; Figure 2 This is a cross-sectional structural example diagram of a clamping device for longitudinal detection of an automobile crankshaft according to an embodiment of the present application; Figure 3 This is an exemplary diagram of the cross-sectional structure of a clamping support member of a clamping device for longitudinal detection of an automobile crankshaft according to an embodiment of the present application; Figure 4 This is a structural example diagram of a clamping support member of a clamping device for longitudinal detection of an automobile crankshaft according to an embodiment of the present application; Figure 5 This is an exemplary cross-sectional view of the push-pull connector of the clamping device for longitudinal detection of an automobile crankshaft according to an embodiment of the present application; Figure 6 This is a structural example diagram of a push-pull shaft of a clamping device for longitudinal detection of an automobile crankshaft according to an embodiment of the present application; Figure 7 This is a structural example diagram of a fixing seat of a clamping device for longitudinal detection of an automobile crankshaft according to an embodiment of the present application; Figure 8 This is a structural example diagram of a heating cylinder of a clamping device for longitudinal detection of an automobile crankshaft according to an embodiment of the present application; Fig. 9 This is a structural example diagram of a top cover of a clamping device for longitudinal detection of an automobile crankshaft according to an embodiment of the present application; Fig.10 This is a diagram showing an example of clamping of a clamping device for longitudinal detection of an automobile crankshaft according to an embodiment of the present application; In the figure, 1-clamping support, 2-push-pull connector, 3-push-pull shaft, 4-fixed seat, 5-heating cylinder, 6-top cover, 11-support seat, 12-clamping cylinder, 13-clamping head, 14-support column, 15-positioning hole, 16-fixed groove, 17-curved groove, 21-push-pull connector bottom, 22-push-pull connector side, 23-push-pull connector top, 24-axis hole, 25-first fastening hole, 26-positioning protrusion, 31-push-pull shaft body, 32-first annular portion, 33-second annular portion, 34-second fastening Fixed hole, 35-fixed protrusion, 41-annular fastening base, 42-fixed cylinder, 43-slide groove, 44-through groove, 45-third fastening hole, 51-heating cylinder body, 52-clamping cylinder assembly cavity, 53-spiral channel, 54-DC channel, 55-slide rail protrusion, 56-push-pull connector assembly cavity, 57-first sealing groove, 58-second sealing groove, 59-fourth fastening hole, 61-workpiece hole, 62-clamping head assembly cavity, 63-third sealing groove, 64-fifth fastening hole, 65-heat storage tank, 7-crankshaft workpiece. DETAILED DESCRIPTION

[0021] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0022] It should be noted that the following embodiments and features in the embodiments may be combined with each other in the absence of conflict; and, based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making any creative work are within the scope of protection of the present disclosure.

[0023] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein may be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present disclosure, it should be understood by those skilled in the art that an aspect described herein may be implemented independently of any other aspect, and two or more of these aspects may be combined in various ways. For example, any number of aspects described herein may be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein may be used to implement this device and / or practice this method.

[0024] Figure 1 This is an exploded structural example diagram of a clamping device for longitudinal detection of an automobile crankshaft according to an embodiment of the application. Figure 2 FIG. 4 is a cross-sectional structural example diagram of a clamping device for longitudinal detection of an automobile crankshaft according to an embodiment of the present application, as shown in FIG. Figure 1 and Figure 2As shown, the clamping device for longitudinal detection of automobile crankshafts in this embodiment includes a clamping support 1, a push-pull connector 2, a push-pull shaft 3, a fixing seat 4, a heating cylinder 5 and a top cover 6. The top cover 6 is fixedly arranged on the top of the heating cylinder 5, the clamping support 1 is coaxially assembled in the cavity inside the top cover 6 and the heating cylinder 5, the push-pull shaft 3 is coaxially arranged below the clamping support 1, the upper part of the push-pull connector 2 is assembled on the bottom of the heating cylinder 5 and fixedly connected to the bottom of the clamping support 1, the lower part of the push-pull connector 2 is fixedly connected to the push-pull shaft 3, and the fixing seat 4 is coaxially arranged on the outside of the heating cylinder 5. When the push-pull shaft 3 is moved longitudinally, the clamping support 1, the heating cylinder 5 and the top cover 6 can be synchronously moved axially.

[0025] Figure 3 This is an exemplary cross-sectional view of a clamping support member of a clamping device for longitudinal detection of an automobile crankshaft according to an embodiment of the present application. Figure 4 FIG. 1 is a structural example diagram of a clamping support member of a clamping device for longitudinal detection of an automobile crankshaft according to an embodiment of the present application, as shown in FIG. Figure 3 and Figure 4 As shown, the clamping support 1 of this embodiment includes a support seat 11, a clamping cylinder 12, a clamping head 13, and a support column 14 which is integrally connected from bottom to top and is arranged on the upper part of the support seat 11 and coaxially arranged on the inner side of the clamping cylinder 12. As an optional example, in this embodiment, a plurality of positioning holes 15 are arranged on the upper circumference of the support seat 11. In practical applications, the positioning holes 15 can be cylindrical or other shapes. A plurality of fixing grooves 16 are arranged on the lower circumference of the support seat 11. In this embodiment, the cross-sectional shape of the fixing groove 16 is a fan-shaped. When implementing the clamping device for longitudinal detection of the automobile crankshaft of this application, the cross-sectional shape of the fixing groove 16 can also be set to other shapes, such as elliptical, circular or polygonal. The outer diameter of the clamping head 13 of this embodiment increases from bottom to top, and a plurality of through curved grooves 17 are arranged on the circumference of the clamping head 13.

[0026] In this embodiment, the clamping head 13 with increasing outer diameter from bottom to top can improve the stability of the clamping support 1 during the clamping process. At the same time, the clamping head 13 with increasing outer diameter from bottom to top can realize the synchronous linkage of the top cover 6. Specifically, when the push-pull shaft 3 is moved downward, due to the structural design of the clamping head 13, pressure can be generated on the inner side of the top cover 6, thereby realizing the synchronous axial movement of the clamping support 1 and the top cover 6. The support column 14 in this embodiment is used to support the workpiece to be tested during compression testing. Specifically, when the push-pull shaft 3 is moved upward, the support column 14 contacts and transmits pressure to the workpiece to be tested.

[0027] Figure 5 FIG. 2 is a cross-sectional structural example diagram of a push-pull connector of a clamping device for longitudinal detection of an automobile crankshaft according to an embodiment of the present application. Figure 5As shown, the push-pull connector 2 of this embodiment includes, from bottom to top, an integrally connected push-pull connector bottom 21, a push-pull connector side 22 and a push-pull connector top 23. An axial hole 24 is coaxially arranged on the inner side of the push-pull connector bottom 21, and a plurality of first fastening holes 25 are coaxially arranged on the outer side of the axial hole 24. The push-pull connector top 23 is an annular protrusion extending toward the inner side of the push-pull connector side 22. A plurality of positioning protrusions 26 are integrally arranged on the bottom of the push-pull connector top 23, and the positioning protrusions 26 match the positioning holes 15 of the clamping support 1.

[0028] In this embodiment, the push-pull connector 2 is radially limited by the assembly combination of the positioning protrusion 26 and the positioning hole 15 to ensure the stability of the push-pull connector 2, and the push-pull connector 2 is linked with the clamping support 1 when moving downward, that is, when the push-pull shaft 3 is moved downward, the push-pull connector 2 pulls the clamping support 1 to move downward synchronously through the assembly combination of the positioning protrusion 26 and the positioning hole 15.

[0029] Figure 6 This is a structural example diagram of the push-pull shaft of the clamping device for longitudinal detection of an automobile crankshaft according to an embodiment of the present application. Figure 6 As shown, the push-pull shaft 3 of this embodiment includes a push-pull shaft body 31, a first annular portion 32 arranged in the middle of the push-pull shaft body 31, and a second annular portion 33 arranged at the top of the push-pull shaft body 31. A plurality of second fastening holes 34 are arranged on the circumference of the first annular portion 32, and the second fastening holes 34 match the first fastening holes 25 of the push-pull connector 2. A plurality of fixing protrusions 35 are arranged on the top circumference of the second annular portion 33, and the fixing protrusions 35 match the fixing grooves 16 of the clamping support 1. The push-pull shaft 3 of this embodiment is connected to a driving device arranged on a corresponding detection device, such as a servo motor or a hydraulic driving device with telescopic power output. Under the action of the driving device, the push-pull shaft 3 can move upward or downward.

[0030] In this embodiment, by assembling the first fastening hole 25 and the second fastening hole 34, the bottom of the push-pull connector 2 is fixedly assembled on the first annular portion 32 of the push-pull shaft 3 under the action of the fastener. In this way, the push-pull shaft 3 and the push-pull connector 2 are linked. When the push-pull shaft 3 moves upward or downward, the push-pull connector 2 is synchronously driven to move. The fixed protrusion 35 matches the fixed groove 16 of the clamping support 1, which can realize the radial positioning of the push-pull shaft 3, further ensure the stability of the overall structure of the clamping device for longitudinal detection of the automobile crankshaft in this embodiment, avoid minor errors caused by assembly errors, and improve the clamping stability and accuracy of the device.

[0031] Figure 7 FIG. 1 is a structural example diagram of a fixing seat of a clamping device for longitudinal detection of an automobile crankshaft according to an embodiment of the present application, as shown in FIG. Figure 7As shown, the fixing seat 4 of this embodiment includes an annular fastening base 41 and a fixing cylinder 42 integrally connected to the annular fastening base 41, a plurality of slide grooves 43 are annularly arranged on the inner wall of the fixing cylinder 42, two through grooves 44 are symmetrically arranged on the fixing cylinder 42, and a plurality of third fastening holes 45 are circumferentially arranged on the annular fastening base 41. It should be noted that, in this embodiment, the fixing seat 4 is a base for assembly and operation, and in actual application, the fixing seat 4 is fixedly assembled at the fixture installation position of the corresponding detection equipment through the third fastening holes 45.

[0032] Figure 8 FIG. 1 is a structural example diagram of a heating cylinder of a clamping device for longitudinal detection of an automobile crankshaft according to an embodiment of the present application, as shown in FIG. Figure 8 As shown, the heating cylinder 5 of this embodiment includes a heating cylinder body 51 which is a rotating body as a whole, a clamping cylinder assembly cavity 52 is coaxially arranged inside the heating cylinder body 51, a spiral channel 53 is arranged on the heating cylinder body 51 outside the clamping cylinder assembly cavity 52, two direct current channels 54 are symmetrically arranged on the heating cylinder body 51, and the direct current channels 54 are connected with the spiral channel 53, a plurality of slide rail protrusions 55 are arranged on the outer circumference of the heating cylinder body 51, and the slide rail protrusions 55 match the slide groove 43 of the fixing seat 4, an annular push-pull connector assembly cavity 56 is coaxially arranged inside the bottom of the heating cylinder body 51, a first sealing groove 57 and a second sealing groove 58 are coaxially arranged on the top of the heating cylinder body 51 from inside to outside, and a plurality of fourth fastening holes 59 are arranged on the top circumference of the heating cylinder body 51. In practical applications, when the clamping support 1 is assembled on the inner side of the heating cylinder 5, a sealing member is arranged in the first sealing groove 57 to improve the heating effect of the heating cylinder 5.

[0033] In this embodiment, the slide rail protrusions 55 of the heating cylinder 5 are assembled in the slide grooves 43 of the fixed seat 4 in a one-to-one correspondence. When the heating cylinder 5 slides longitudinally in the fixed seat 4, the cooperation between the slide grooves 43 and the slide rail protrusions 55 can radially limit the heating cylinder 5, so that the heating cylinder 5 will not rotate when moving longitudinally, thereby ensuring the structural stability of the device. At the same time, the longitudinal length of the slide grooves 43 provides a longitudinal stroke limit for the longitudinal movement of the heating cylinder 5. In practical applications, when the heating bar 5 moves longitudinally, the two symmetrically arranged direct current channels 54 on the outside of the heating cylinder 5 move in the two through grooves 44 of the fixed seat 4. As an optional example, the two direct current channels 54 serve as a heat source inlet and a heat source outlet, respectively. For example, a fluid medium with a certain temperature can be used as the heat source of the heating cylinder 5 of this embodiment. The fluid medium used in this embodiment can be a liquid medium or a gas medium. By allowing a fluid medium with a certain temperature to enter the heating cylinder 5 from the direct current channel 54 on one side, flowing through the spiral channel 53 of the heating cylinder 5, and flowing out from the direct current channel 54 on the other side, the heating cylinder 5 reaches a set temperature, thereby heating the clamping support 1 and the clamped workpiece to be measured.

[0034] In this embodiment, the annular push-pull connector assembly cavity 56 at the bottom of the heating cylinder 5 is used to assemble with the upper part of the push-pull connector 2. In actual application, when the push-pull shaft 3 moves upward, the push-pull connector 2 arranged in the push-pull connector assembly cavity 56 and the support seat 11 of the clamping support member 1 support the heating cylinder 5, so as to realize the linkage between the heating cylinder 5 and the push-pull connector 2.

[0035] Fig. 9 FIG. 1 is a structural example diagram of a top cover of a clamping device for longitudinal detection of an automobile crankshaft according to an embodiment of the present application, as shown in FIG. Fig. 9 As shown, the top cover 6 of this embodiment is a body of revolution as a whole, and the inner side of the top cover 6 is provided with a workpiece hole 61 and a clamping head assembly cavity 62 which are connected coaxially from top to bottom, and the clamping head assembly cavity 62 matches the shape of the clamping head 13. A plurality of fifth fastening holes 64 are coaxially provided on the top cover 6, and the fifth fastening holes 64 match the fourth fastening holes 59 on the top of the heating cylinder 5. In practical applications, the top cover 6 is fixed to the top of the heating cylinder 5 by matching the fifth fastening holes 64 with the fourth fastening holes 59. When the push-pull shaft 3 is moved downward, the clamping head 13 generates pressure on the inner side of the clamping head assembly cavity 62 by matching the clamping head 13 with the clamping head assembly cavity 62, thereby realizing the synchronous axial movement of the clamping support 1, the top cover 6 and the heating cylinder 5.

[0036] As an optional example, in this embodiment, a third sealing groove 63 is coaxially arranged at the bottom of the top cover 6, and the third sealing groove 63 matches the second sealing groove 58 at the top of the heating cylinder 5. A sealing member is arranged in the annular cavity formed by the second sealing groove 58 and the third sealing groove 63 to improve the heating effect of the heating cylinder 5.

[0037] As an optional example, in this embodiment, a plurality of annular heat storage grooves 65 are coaxially arranged from top to bottom on the inner side of the top cover 6, and the open ends of the heat storage grooves 65 are connected to the clamping head assembly cavity 62. When the heat from the heating cylinder 5 is transferred to the clamping head 13 through the clamping cylinder 12 of the clamping support 1, the heat of the clamping head 13 is dissipated into the annular heat storage grooves 65, thereby improving the temperature uniformity and heating effect of the clamping head 13 as the clamping concentration area.

[0038] The application principle of the clamping device for longitudinal detection of automobile crankshafts in this embodiment is as follows: Fig.10 This is a clamping example diagram of the clamping device for longitudinal detection of an automobile crankshaft according to an embodiment of the present application. Figure 2 and Fig.10 The clamping device for longitudinal detection of the automobile crankshaft of this embodiment and the crankshaft workpiece 7 are assembled and clamped, and the base fixing and power connection of the clamping device for longitudinal detection of the automobile crankshaft of this embodiment are completed.

[0039] It should be noted that when the clamping device for longitudinal detection of the automobile crankshaft of this embodiment is used for detection, the clamping device can be set at both ends of the crankshaft workpiece 7, or it can be set at one end of the crankshaft workpiece 7. In this example scenario, the clamping device for longitudinal detection of the automobile crankshaft of this embodiment is used to clamp the upper end and the lower end of the crankshaft workpiece 7. For ease of explanation, this scenario example describes the movement of the clamping device for longitudinal detection of the automobile crankshaft set at the lower end of the crankshaft workpiece 7.

[0040] When the crankshaft workpiece 7 is subjected to a tensile test by using the clamping device for longitudinal inspection of an automobile crankshaft of this embodiment, the push-pull shaft 3 moves downward, synchronously driving the push-pull connecting member 2, the clamping support member 1, the top cover 6 and the heating cylinder 5 to move axially downward, thereby stretching the crankshaft workpiece 7 clamped in the clamping support member 1.

[0041] When the clamping device for longitudinal inspection of an automobile crankshaft of this embodiment is used to perform a pressure inspection test on a crankshaft workpiece 7, the push-pull shaft 3 moves upward, driving the push-pull connecting member 2, the clamping support member 1, the top cover 6 and the heating cylinder 5 to move axially upward synchronously, and the crankshaft workpiece 7 clamped in the clamping support member 1 is contacted and pressure is transmitted through the support column 14.

[0042] When it is necessary to perform temperature simulation on the crankshaft workpiece 7 , the crankshaft workpiece 7 is heated by circulating a fluid medium in the heating cylinder 5 .

[0043] In practical applications, the push-pull shaft 3 can be alternately moved up and down at a preset frequency and set at a preset temperature according to the needs of the actual simulation scene.

[0044] In practical applications, the clamping device for longitudinal detection of automobile crankshafts of this embodiment has the following beneficial technical effects: 1. It can realize the longitudinal stretching and longitudinal pressure clamping of the crankshaft on the basis of one clamping, which significantly simplifies the detection process and completes the detection of multiple mechanical properties in the same clamping, without the need to frequently replace the fixture or re-clamp the crankshaft, thereby improving the detection efficiency and accuracy; 2. It can provide temperature simulation conditions for the workpiece in mechanical property testing through heating and temperature control, so that the testing device can simulate the mechanical properties at different temperatures and further restore the real application conditions in multiple dimensions; 3. Easy assembly and disassembly, reducing the preparation time before testing and the cleaning time after testing, improving the overall work efficiency, and also reducing the equipment loss caused by frequent clamping and disassembly; 4. Stable clamping and high clamping accuracy can ensure the accurate position of the crankshaft during the detection process, avoid detection errors caused by improper clamping, improve the reliability and repeatability of the detection results, and ensure the accuracy of the detection data.

[0045] The clamping device for longitudinal inspection of automobile crankshafts of the present application improves the efficiency and accuracy of crankshaft mechanical property inspection through comprehensive structural design, and provides a more comprehensive performance evaluation by simulating real application conditions. It is of great significance to improve the reliability and performance of automobile crankshafts, reduce production costs, and optimize product quality control.

[0046] The above is only a specific implementation of the present application, but the protection scope of the present application 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 in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A clamping device for longitudinal detection of an automobile crankshaft, characterized in that: The device includes a clamping support, a push-pull connection, a push-pull shaft, a fixing seat, a heating cylinder and a top cover, wherein the top cover is fixedly arranged on the top of the heating cylinder, the clamping support is coaxially assembled in a cavity between the top cover and the inner side of the heating cylinder, the push-pull shaft is coaxially arranged below the clamping support, the upper part of the push-pull connection is assembled on the bottom of the heating cylinder and fixedly connected to the bottom of the clamping support, the lower part of the push-pull connection is fixedly connected to the push-pull shaft, and the fixing seat is coaxially arranged on the outer side of the heating cylinder, and when the push-pull shaft is moved longitudinally, the clamping support, the heating cylinder and the top cover can be synchronously moved axially.

2. The clamping device for longitudinal detection of an automobile crankshaft according to claim 1, characterized in that: The clamping support member includes a support seat, a clamping cylinder, a clamping head and a support column which is integrally connected from bottom to top and is integrally arranged on the upper part of the support seat and coaxially arranged on the inner side of the clamping cylinder. A plurality of positioning holes are arranged on the upper circumference of the support seat, and a plurality of fixing grooves are arranged on the lower circumference of the support seat.

3. The clamping device for longitudinal detection of an automobile crankshaft according to claim 2, characterized in that: The outer diameter of the clamping head increases from bottom to top, and a plurality of through curved grooves are arranged on the circumference of the clamping head.

4. The clamping device for longitudinal detection of an automobile crankshaft according to claim 3, characterized in that: The push-pull connector includes, from bottom to top, an integrally connected push-pull connector bottom, a push-pull connector side, and a push-pull connector top. An axial hole is coaxially arranged on the inner side of the push-pull connector bottom, and a plurality of first fastening holes are coaxially arranged on the outer side of the axial hole. The push-pull connector top is an annular protrusion extending toward the inner side of the push-pull connector side. A plurality of positioning protrusions are integrally arranged on the bottom of the push-pull connector top, and the positioning protrusions match the positioning holes of the clamping support.

5. The clamping device for longitudinal detection of an automobile crankshaft according to claim 4, characterized in that: The push-pull shaft includes a push-pull shaft body, a first annular portion arranged in the middle of the push-pull shaft body, and a second annular portion arranged at the top of the push-pull shaft body. A plurality of second fastening holes are arranged on the upper circumference of the first annular portion, and the second fastening holes match the first fastening holes of the push-pull connector. A plurality of fixing protrusions are arranged on the top circumference of the second annular portion, and the fixing protrusions match the fixing grooves of the clamping support.

6. The clamping device for longitudinal detection of an automobile crankshaft according to claim 5, characterized in that: The fixing seat includes an annular fastening base and a fixing cylinder integrally connected to the annular fastening base, a plurality of slide grooves are arranged in an annular manner on the inner wall of the fixing cylinder, two through grooves are symmetrically arranged on the fixing cylinder, and a plurality of third fastening holes are arranged circumferentially on the annular fastening base.

7. The clamping device for longitudinal detection of an automobile crankshaft according to claim 6, characterized in that: The heating cylinder includes a heating cylinder body which is a rotating body as a whole, a clamping cylinder assembly cavity is coaxially arranged inside the heating cylinder body, a spiral channel is arranged on the heating cylinder body outside the clamping cylinder assembly cavity, two direct current channels are symmetrically arranged on the heating cylinder body, and the direct current channels are connected with the spiral channel, an annular push-pull connecting piece assembly cavity is coaxially arranged on the inner side of the bottom of the heating cylinder body, a first sealing groove and a second sealing groove are coaxially arranged from the inside to the outside on the top of the heating cylinder body, and a plurality of fourth fastening holes are arranged on the top circumference of the heating cylinder body.

8. The clamping device for longitudinal inspection of an automobile crankshaft according to claim 7, characterized in that: A plurality of slide rail protrusions are arranged on the outer circumference of the heating cylinder body, and the slide rail protrusions match the slide grooves of the fixing seat.

9. The clamping device for longitudinal inspection of an automobile crankshaft according to claim 8, characterized in that: The top cover as a whole is a rotating body, and the inner side of the top cover is coaxially arranged with a connected workpiece hole and a clamping head assembly cavity from top to bottom, the clamping head assembly cavity matches the shape of the clamping head, and the bottom of the top cover is coaxially arranged with a third sealing groove, which matches the second sealing groove on the top of the heating cylinder, and the top cover is coaxially arranged with a plurality of fifth fastening holes, which match the fourth fastening holes on the top of the heating cylinder.

10. The clamping device for longitudinal inspection of an automobile crankshaft according to claim 9, characterized in that: A plurality of annular heat storage grooves are coaxially arranged from top to bottom on the inner side of the top cover, and the open ends of the heat storage grooves are communicated with the clamping head assembly cavity.

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