Testing system for exerting stretching effect on hydraulic motor shell

Abstract

The invention relates to the technical field of motor shells, and particularly discloses a test system for applying a stretching effect on a hydraulic motor shell, the test system comprises a test bed and a shell, an annular fixed table is fixedly mounted in the middle of the top end of the test bed, an annular groove is formed in the top end of the fixed table, and an annular sliding block is rotatably connected in the annular groove; a fixed cylinder is fixedly connected to the center of the top of the rotary table, a rotating column is rotationally connected into the fixed cylinder, and a detection mechanism is slidably connected to the top of the rotating column. The detection mechanism records pressure change curves at different positions of the inner wall of the cavity in the horizontal direction and the vertical direction, and the tensile strength and the compressive strength of the shell are detected by judging the deformation condition of the shell under the action of different tensile forces or pressures through fluctuation of the pressure change curves.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motor housings, in particular to a test system for applying a tensile action to a hydraulic motor housing. BACKGROUND

[0002] A hydraulic motor housing mainly bears complex loads such as internal oil pressure, external load torque and vibration in actual work, and the tensile action is one of the key stress forms. The test system for the tensile action is used to verify the structural strength and reliability of the housing.

[0003] A common test device for the tensile strength and performance of a hydraulic motor housing generally uses a special fixture to clamp the housing, and then continuously applies a load to the housing until the housing deforms or even disintegrates, so as to test the strength limit of the housing. However, the special fixture for clamping the housing is not convenient for testing different positions of the housing at any time when the tensile load is applied, and the tensile load applied by the tension machine device can only be used for strength test of the housing, but is not convenient for tensile strength test of each threaded hole of the housing, that is, it is not convenient to test the tensile limit of the threaded hole. At the same time, the housing is often destroyed during the test, and it is not convenient to detect the deformation of the housing synchronously during the experiment, and the destruction of the housing is easy to damage the test equipment. SUMMARY

[0004] The present application relates to the technical field of motor housings, in particular to a test system for applying a tensile action to a hydraulic motor housing.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: A test system for applying a tensile action to a hydraulic motor housing, comprising a test table and a housing, wherein the top end of the test table is fixedly provided with an annular fixed table, the top end of the fixed table is provided with an annular groove, the annular groove is rotatably connected with an annular sliding block, the top end of the annular sliding block is fixedly connected with a rotary table, the top center of the rotary table is fixedly connected with a fixed cylinder, the fixed cylinder is rotatably connected with a rotating column, the outer wall of the top of the rotating column is fixedly connected with four limiting strips, the rotating column is slidably connected with a detection mechanism comprising a sliding block, the top end of the fixed table is fixedly provided with a mounting frame on both sides, the mounting frame is slidably connected with a sliding table through a movable groove, the top end of the sliding table is fixedly provided with a tension machine, the tension machine is fixedly connected with a C-shaped block on one side of the top, the C-shaped block is slidably connected with a sliding tension block through an oval groove and a limiting column on one side of the middle, the bottom end of the sliding tension block is provided with an arc-shaped groove on one side, the top of the sliding tension block above the arc-shaped groove is fixedly provided with a mounting block through a mounting groove and an internal hexagonal bolt, the center of the mounting block is threadedly connected with a threaded rod, and a measuring mechanism is arranged on one side of the sliding table close to the fixed table. The inner wall of the sliding block is provided with four limiting grooves, the sliding block is slidably connected with the limiting strip through the limiting grooves, one side of the sliding block is fixedly connected with a first screw rod, the end of the first screw rod is threadedly connected with a movable rod, the end of the movable rod is provided with a movable groove, the end of the movable groove is movably connected with a ball head, and a sliding rod is slidably connected in the movable groove and abuts against a pressure sensor at the end close to the sliding block.

[0006] Preferably, the bottom of the shell is provided with a bearing hole, the inner wall of the shell is provided with an arc-shaped cavity inner wall, the top of the shell is provided with a sealing end, a plurality of threaded holes are uniformly formed in the top of the sealing end, the width of the sealing end is smaller than the width of the arc-shaped groove, and the threaded holes are matched with the threaded rods.

[0007] Preferably, the bottom of the fixed table is fixedly provided with a first motor, and the output shaft of the first motor is fixedly connected with the bottom center of the rotary table.

[0008] Preferably, the top of the rotary table fixedly connected with the outer side of the fixed cylinder is provided with three evenly distributed positioning pins corresponding to the screw holes in the bottom of the shell.

[0009] Preferably, the second motor is fixedly installed in the rotary table, the output shaft of the second motor is fixedly connected with the bottom end of the rotating column, and the limiting strip is located above the fixed cylinder.

[0010] Preferably, the first spring is fixedly connected to the side of the sliding rod close to the sliding block, the end of the first spring is fixedly connected with the inner wall of the movable groove, and the side of the sliding block away from the first screw rod is rotatably connected with a fastening screw.

[0011] Preferably, the measuring mechanism comprises a rotating rod and a measuring rod, two rotating rods are rotatably connected to the side of the fixed table close to the top of the sliding table, the side of the rotating rod is provided with a hollow cavity, the measuring rod is slidably connected in the hollow cavity, the end of the measuring rod is fixedly connected with a stop block, the side wall of the hollow cavity is fixedly connected with a second spring, the end of the second spring is fixedly connected with the side wall of one end of the measuring rod, and a displacement sensor is installed at one end of the second spring.

[0012] Preferably, the third motor is fixedly installed at the top of the sliding table, the output shaft of the third motor is fixedly connected with a connecting rod, the end of the connecting rod is rotatably connected with a connecting shaft, the connecting shaft is fixedly connected with the side walls of the two rotating rods at both ends, and the connecting rod is fixedly connected between the opposite faces of the two stop blocks.

[0013] Preferably, the fourth motor is fixedly installed at the top of the C-shaped block, the output shaft of the fourth motor penetrates through the top of the C-shaped block, the output shaft of the fourth motor is fixedly connected with a second screw rod threadedly connected with one side of the sliding tension block, and the bottom end of the second screw rod is rotatably connected with the bottom of the C-shaped block.

[0014] Compared with the prior art, the present application has the following advantages: The application sets the rotating table and the first motor, the rotating table can rotate along the annular groove driven by the first motor, in the stretching force, compression resistance and stretching force detection of the threaded hole of the shell, the shell can be driven to rotate, and then the detection of different positions of the shell is realized, so that more abundant detection data is obtained, and the detection result is more accurate.

[0015] The application sets the detection mechanism, the detection mechanism uses the rotating column and the sliding block which can be lifted to record the pressure change curve of each different position of the horizontal and vertical directions of the inner wall of the cavity through the ball head and the pressure sensor, the deformation of the shell under the action of different stretching force or pressure is judged through the fluctuation of the pressure change curve, so that the tensile strength and the compression strength of the shell are detected, and the tensile strength of the threaded hole can also be detected in the subsequent use of the threaded rod connected with the threaded hole, wherein the mounting block and the threaded rod can be replaced according to the specification of the threaded hole, compared with the traditional mode of continuously applying force until the shell disintegrates, the tensile performance of the shell can be more fully observed in real time, and the performance detection of the threaded hole can be met, so that the phenomenon of quality problems of the threaded hole in actual use is avoided.

[0016] The application sets the sliding tension block, the tension machine can apply the stretching force and the pressure to the shell through the sliding tension block and the arc-shaped groove, so that the tension machine is not limited to one function, the shell obtains more performance detection data, and the product quality is promoted.

[0017] The application sets the measurement mechanism, the measurement mechanism can support the two sides of the shell through the moving slide table in the preparation stage, and the second spring is compressed in the supporting process, so that the subsequent second spring can reset and push the measuring rod out of the hollow cavity, the displacement sensor is convenient for recording the displacement, and the deformation of the outer wall of the shell is judged, the third motor drives the connecting rod and the rotating rod to rotate, so that the connecting rod rises along the outer wall of the shell, if the shell deforms in the rising process, the displacement curve of the displacement sensor will fluctuate and will not remain linear, through the measurement of the deformation of the outer wall of the shell by the measurement mechanism, the deformation of the inner wall of the cavity by the detection mechanism and the detection of each different position of the shell by the rotating table, sufficient data can be obtained to analyze and judge the tensile strength and the compression strength of the shell. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole structure schematic view of a test system for applying stretching action to a hydraulic motor shell. Figure 2 It is a shell structure schematic view of a test system for applying stretching action to a hydraulic motor shell. Figure 3A fixed table structure diagram of a test system for applying tensile action to a hydraulic motor shell is provided in the present application; Figure 4 A ring groove structure diagram of a test system for applying tensile action to a hydraulic motor shell is provided in the present application; Figure 5 A ring slider structure diagram of a test system for applying tensile action to a hydraulic motor shell is provided in the present application; Figure 6 An exploded view of a fixed cylinder and rotating column structure of a test system for applying tensile action to a hydraulic motor shell is provided in the present application; Figure 7 A detection mechanism structure diagram of a test system for applying tensile action to a hydraulic motor shell is provided in the present application; Figure 8 A movable rod structure sectional view of a test system for applying tensile action to a hydraulic motor shell is provided in the present application; Figure 9 A sliding table structure diagram of a test system for applying tensile action to a hydraulic motor shell is provided in the present application; Figure 10 A rotating rod structure sectional view of a test system for applying tensile action to a hydraulic motor shell is provided in the present application; Figure 11 A C-shaped block structure diagram of a test system for applying tensile action to a hydraulic motor shell is provided in the present application; Figure 12 A sliding tensile block structure diagram of a test system for applying tensile action to a hydraulic motor shell is provided in the present application; Figure 13 An installation block structure diagram of a test system for applying tensile action to a hydraulic motor shell is provided in the present application; Figure 14 A sealed end and arc groove cooperation state diagram of a test system for applying tensile action to a hydraulic motor shell is provided in the present application; Figure 15 A measurement mechanism raised state diagram of a test system for applying tensile action to a hydraulic motor shell is provided in the present application.

[0019] In the figure: 1, test bench; 2, fixed platform; 3, annular groove; 4, annular slider; 5, rotary table; 6, first motor; 7, fixed cylinder; 8, positioning pin; 9, shell; 10, bearing hole; 11, cavity inner wall; 12, sealing end; 13, threaded hole; 14, detection mechanism; 15, rotating column; 16, second motor; 17, limiting strip; 18, sliding block; 19, fastening screw; 20, first screw; 21, movable rod; 22, ball head; 23, sliding rod; 24, first spring; 25, pressure sensor; 26, sliding table; 27, tensile machine; 28, measuring mechanism; 29, rotating rod; 30, measuring rod; 31, connecting rod; 32, second spring; 33, displacement sensor; 34, third motor; 35, connecting rod; 36, C-shaped block; 37, sliding tension block; 38, arc-shaped groove; 39, fourth motor; 40, second screw; 41, mounting block; 42, threaded rod. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0021] Reference Figures 1-15 A test system for applying tension to a hydraulic motor shell, comprising a test bench 1 and a shell 9, the test bench 1 is fixedly installed with an annular fixed platform 2 in the middle of the top end, the top end of the fixed platform 2 is provided with an annular groove 3, the annular groove 3 is rotatably connected with an annular slider 4, the top end of the annular slider 4 is fixedly connected with a rotary table 5, the top center of the rotary table 5 is fixedly connected with a fixed cylinder 7, the fixed cylinder 7 is rotatably connected with a rotating column 15, the top outer wall of the rotating column 15 is fixedly connected with four limiting strips 17, the rotating column 15 is slidably connected with a detection mechanism 14 including a sliding block 18 at the top, mounting racks are fixedly arranged at the top of the test bench 1 on both sides of the fixed platform 2, a sliding table 26 is slidably connected with the mounting racks through a movable groove at the top of the mounting racks, a tensile machine 27 is fixedly installed at the top of the sliding table 26, a C-shaped block 36 is fixedly connected with the force receiving end on one side of the top of the tensile machine 27, a sliding tension block 37 is slidably connected with the C-shaped block 36 through an oval groove and a limiting column on one side of the middle of the C-shaped block 36, an arc-shaped groove 38 is formed on one side of the bottom of the sliding tension block 37, an installation block 41 is fixedly installed on the top of the sliding tension block 37 above the arc-shaped groove 38 through a mounting groove and an internal hexagonal bolt, a threaded rod 42 is threadedly connected with the center of the installation block 41, and a measuring mechanism 28 is arranged on one side of the sliding table 26 close to the fixed platform 2. The inner wall of the sliding block 18 is provided with four limiting grooves, the sliding block 18 is slidably connected with the limiting strip 17 through the limiting grooves, one side of the sliding block 18 is fixedly connected with the first screw rod 20, the end of the first screw rod 20 is threadedly connected with the movable rod 21, the end of the movable rod 21 is provided with a movable groove, the end of the movable groove is movably connected with the ball head 22, the movable groove is slidably connected with the sliding rod 23, and the end of the sliding rod 23 close to the sliding block 18 is abutted with the pressure sensor 25. The rotating table 5 can be driven to rotate along the annular groove 3 by the first motor 6, in the detection items of the tensile force, the compressive force and the tensile force of the threaded hole 13 of the shell 9, the shell 9 can be driven to rotate, and then the detection of different positions of the shell 9 is realized, so that more abundant detection data is obtained, and the detection result is more accurate. The fixed cylinder 7 is used for positioning the shell 9, the detection mechanism 14 uses the rotatable rotating column 15 and the liftable sliding block 18 to record the pressure change curves of each different position of the horizontal and vertical directions of the cavity inner wall 11 through the ball head 22 and the pressure sensor 25, the deformation of the shell 9 under the action of different tensile forces or pressures is judged through the fluctuation of the pressure change curves, and the tensile strength and the compressive strength of the shell 9 are detected. The tensile strength of the threaded hole 13 can also be detected in the subsequent mode of connecting the threaded hole 13 with the threaded rod 42, wherein the mounting block 41 and the threaded rod 42 can be replaced according to the specifications of the threaded hole 13. Compared with the traditional mode of continuously applying force until the shell 9 is disintegrated, the tensile performance of the shell 9 can be more fully and real-timely observed, and the performance detection of the threaded hole 13 can be met, so that the quality problem of the threaded hole 13 in actual use is avoided. The tensile machine 27 can apply tensile force and pressure to the shell 9 through the sliding tensile block 37 and the arc-shaped groove 38, so that the tensile machine 27 is not limited to one function, and more performance detection data of the shell 9 is obtained, which promotes the improvement of product quality.

[0022] As a technical optimization scheme of the present application, the bottom of the shell 9 is provided with a bearing hole 10, the inner wall of the shell 9 is provided with an arc-shaped cavity inner wall 11, the top of the shell 9 is provided with a sealing end 12, a plurality of threaded holes 13 are uniformly arranged on the top of the sealing end 12, the width of the sealing end 12 is smaller than the width of the arc-shaped groove 38, and the threaded holes 13 are matched with the threaded rods 42. The tensile machine 27 can directly simulate the tensile or pressure load of the connected part of the sealing end 12 of the hydraulic motor after installation by applying force to the sealing end 12.

[0023] As a technical optimization scheme of the present application, the first motor 6 is fixedly installed at the bottom of the fixed table 2, and the output shaft of the first motor 6 is fixedly connected with the bottom end center of the rotating table 5. The first motor 6 can drive the rotating table 5 and the shell 9 to rotate, so that different positions of the shell 9 can be detected.

[0024] As a technical optimization scheme of the present application, the top end of the rotating table 5 outside the fixed cylinder 7 is fixedly connected with three evenly distributed positioning pins 8, which correspond to the screw holes at the bottom end of the shell 9. The positioning pins 8 are used to position the shell 9, and when the rotating table 5 is rotated, the shell 9 can be driven to rotate synchronously.

[0025] As a technical optimization scheme of the present application, the second motor 16 is fixedly installed inside the rotating table 5, the output shaft of the second motor 16 is fixedly connected with the bottom end of the rotating column 15, and the limiting strip 17 is located above the fixed cylinder 7. The second motor 16 is used to drive the rotating column 15 and the detection mechanism 14 to rotate, so as to realize the recording of the pressure change of the inner wall of the cavity inner wall 11 by the detection mechanism 14, and the detection mechanism 14 can also change the height position on the rotating column 15, that is, the detection mechanism 14 can simultaneously realize the recording of the pressure change of the cavity inner wall 11 at different heights, that is, the tensile and compressive strength of the shell 9 can be analyzed.

[0026] As a technical optimization scheme of the present application, the first spring 24 is fixedly connected with the sliding block 18 on one side close to the sliding block 18, the end of the first spring 24 is fixedly connected with the inner wall of the movable groove, and the fastening screw 19 is rotatably connected with the sliding block 18 on the side away from the first screw 20. The fastening screw 19 is used to fix the height position of the sliding block 18, and the first spring 24 is used to support the ball head 22, so as to facilitate the timely transmission of deformation through the movement of the ball head 22 and the sliding rod 23 when the ball head 22 deforms on the cavity inner wall 11, and realize data through the pressure sensor 25.

[0027] As a technical optimization scheme of the present application, the measuring mechanism 28 comprises a rotating rod 29 and a measuring rod 30, two rotating rods 29 are rotatably connected with the top end of the sliding table 26 on one side close to the fixed table 2, a hollow cavity is formed on one side of the rotating rod 29, the measuring rod 30 is slidably connected in the hollow cavity, the end of the measuring rod 30 is fixedly connected with a stop block, the second spring 32 is fixedly connected with the side wall of the hollow cavity, the end of the second spring 32 is fixedly connected with the side wall of one end of the measuring rod 30, and the displacement sensor 33 is installed at one end of the second spring 32. In the preparation stage, the measuring mechanism 28 can move the sliding table 26 to support the two sides of the shell 9 by the stop block, and in the process of supporting, the second spring 32 is compressed so that the subsequent second spring 32 can be reset to push the measuring rod 30 out of the hollow cavity, so as to facilitate the displacement sensor 33 to record the displacement, which is used to judge the deformation of the outer wall of the shell 9.

[0028] As a technical optimization scheme of the present application, the third motor 34 is fixedly installed at the top end of the sliding table 26, the output shaft of the third motor 34 is fixedly connected with the connecting rod 35, the connecting rod 35 is rotatably connected with the connecting shaft at the end, the connecting shaft is fixedly connected with the two rotating rods 29 at the two ends, and the connecting rod 31 is fixedly connected between the opposite surfaces of the two stop blocks. The third motor 34 drives the connecting rod 35 and the rotating rod 29 to rotate, so that the connecting rod 31 rises along the outer wall of the shell 9. During the rising process, if the shell 9 deforms, the displacement curve of the displacement sensor 33 will fluctuate and will not remain linear. Through the measurement of the deformation of the outer wall of the shell 9 by the measuring mechanism 28, the deformation amount detection of the inner wall 11 of the cavity by the detection mechanism 14 and the detection of different positions of the shell 9 by the rotating table 5, sufficient data can be obtained for specific analysis and judgment of the tensile and compressive strength of the shell 9.

[0029] As a technical optimization scheme of the present application, the fourth motor 39 is fixedly installed at the top end of the C-shaped block 36, the output shaft of the fourth motor 39 penetrates out of the top end of the C-shaped block 36, the bottom end of the output shaft of the fourth motor 39 is fixedly connected with the second screw rod 40 which is threadedly connected with one side of the sliding tension block 37, and the bottom end of the second screw rod 40 is rotatably connected with the bottom of the C-shaped block 36. The fourth motor 39 can drive the sliding tension block 37 to rise and fall, so as to facilitate the connection of the arc-shaped groove 38 with the sealing end 12.

[0030] In use, the shell 9 is carried above the fixed table 2, so that the bearing hole 10 is aligned with the fixed cylinder 7 and the rotating column 15, and then the shell 9 is lowered, the rotating column 15 and the fixed cylinder 7 pass through the bearing hole 10 in sequence during the lowering process of the shell 9, when the bottom end of the shell 9 approaches the top end of the fixed table 2, the positioning pin 8 first abuts against the bottom end of the shell 9, at this time the shell 9 can be manually rotated to make each positioning pin 8 respectively inserted into the screw hole at the bottom end of the shell 9, at this time the bottom end of the shell 9 abuts against the top end of the fixed table 2, that is, the placement and temporary position fixing of the shell 9 are completed.

[0031] The two sliding tables 26 are controlled to slide towards each other along the two movable grooves, during the sliding process of the sliding table 26, the ends of the two horizontally placed measuring rods 30 first abut against the outer wall of the shell 9, with the continuous movement of the sliding table 26, the end stop block of the measuring rod 30 slides along the inside of the rotating rod 29 under stress to compress the second spring 32, at the same time the displacement sensor 33 records the displacement amount, finally when the center of the arc-shaped groove 38 of the sliding tension block 37 and the center of the sealing end 12 are located on the same vertical plane, the sliding table 26 stops, the two fourth motors 39 are started to drive the second screw rod 40 to rotate, so that the sliding tension block 37 descends along the middle elliptical groove of the C-shaped block 36, finally the top end of the arc-shaped groove 38 abuts against the top end of the sealing end 12, at this time the tension machine 27 is ready.

[0032] Install detection mechanism 14, the sliding block 18 sliding connection into the limit strip 17 and rotating column 15, so that the ball head 22 aligns the middle position of the cavity inner wall 11, manually rotate the fastening screw 19, so that the fastening screw 19 and rotating column 15 tightly abuts and stabilizes the position of the slide block 18, at this time, manually rotate the movable rod 21, so that the movable rod 21 rotates around the first screw 20 and moves away from the sliding block 18, and finally the ball head 22 abuts the cavity inner wall 11 and compresses the first spring 24 and the slide rod 23 to make the pressure sensor 25 generate pressure. The background records this pressure value.

[0033] Start to apply tension, two tension machines 27 start to pull the sliding tension block 37 so that the two arc-shaped grooves 38 abut the inner wall of the sealing end 12 respectively, and continue to apply tension. The tension machine 27 increases the size of the tension once, that is, the pressure change curve of the pressure sensor 25 is recorded through the background, and the second motor 16 is started to drive the rotating column 15, the sliding block 18, the movable rod 21 and the ball head 22 to rotate around the fixed cylinder 7, that is, the ball head 22 moves along the circumference of the cavity inner wall 11, and the pressure change curve of each position on the horizontal plane of the cavity inner wall 11 is recorded. When the pressure change recording at the current height is completed, manually loosen the fastening screw 19, adjust the height position of the sliding block 18 on the rotating column 15, and then repeat the above operation to record the pressure change curve at different height positions.

[0034] At the same time of recording the pressure change curve through the pressure sensor 25, the third motor 34 is started to drive the connecting rod 35 to slowly rotate, and then drive the connecting shaft and the two rotating rods 29 to slowly rotate and lift. During the rotation of the rotating rod 29, the connecting rod 31 gradually slides upward along the outer wall of the shell 9. At this time, the second spring 32 loses force and resets to push the measuring rod 30 and the connecting rod 31 to slide outward along the hollow cavity, and the displacement sensor 33 records the displacement change curve.

[0035] After the detection of the first two steps is completed, the tension machine 27 is reset to pause the application of tension, and the third motor 34 is reversed to drive the rotating rod 29 and the measuring rod 30 to reset. The first motor 6 is started to drive the turntable 5 to rotate thirty degrees through the annular slide block 4 along the annular groove 3, that is, the shell 9 is rotated thirty degrees. At this time, the relative position of the two sliding tension blocks 37 and the sealing end 12 is rotated thirty degrees. Repeat the first two steps to detect the tension of the sealing end 12 at different positions and record the pressure change curve and the displacement change curve respectively. After the detection is completed, repeat this step in turn until the detection of each angular position of the sealing end 12 is completed.

[0036] After the tensile force detection is completed, the trend of the curve is observed by analyzing the pressure change curve and the displacement change curve, and the pressure and displacement changes of the pressure sensor 25 and the displacement sensor 33 under the action of different tensile forces of the tensile testing machine 27 are observed. If the curve is smooth, it can be judged that the shell 9 does not deform and other problems, and if the curve fluctuates, it can be judged that the shell 9 deforms under the action of the current tensile force.

[0037] The tensile testing machine 27 is reset, the threaded rod 42 is screwed into the mounting block 41, and the bottom of the threaded rod 42 is screwed into the threaded hole 13. At this time, the second motor 16 drives the rotating column 15 and the sliding block 18 to rotate, so that the ball head 22 is finally aligned in the direction of a threaded rod 42. The tensile testing machine 27 is started to apply a tensile force. At this time, the tensile force is borne by the threaded rod 42 and the threaded hole 13, and the horizontal position of the ball head 22 does not change only the height position. The tensile strength of the threaded hole 13 is judged by recording the pressure change curve and the displacement change curve, and the rotating table 5 and the shell 9 are driven by the first motor 6 to rotate to detect each threaded hole 13 in turn.

[0038] A shell 9 is replaced, and the two tensile testing machines 27 are started again according to the foregoing operation. The sliding tensile block 37 is pushed by the tensile testing machine 27 to make the two arc-shaped grooves 38 abut against the outer wall of the sealing end 12 respectively, and a continuous pushing force is applied. At this time, the pressure change curve and the displacement change curve are recorded again according to the foregoing steps to detect the compressive strength of the shell 9.

[0039] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

[0040] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can make equivalent substitutions or changes to the technical solutions and inventive concepts of the present application within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A test system for applying a tensile force to a hydraulic motor housing, comprising a test bench (1) and a housing (9), characterized in that: The test bench (1) is fixedly provided with an annular fixed platform (2) at the middle of the top, an annular groove (3) is provided at the top of the fixed platform (2), an annular slider (4) is rotatably connected in the annular groove (3), a turntable (5) is fixedly connected at the top of the annular slider (4), a fixed cylinder (7) is fixedly connected at the top center of the turntable (5), a rotating column (15) is rotatably connected in the fixed cylinder (7), four limiting bars (17) are fixedly connected to the outer wall of the top of the rotating column (15), a detection mechanism (14) including a sliding block (18) is slidably connected to the top of the rotating column (15), and mounting frames are fixedly provided at the tops of the test benches (1) on both sides of the fixed platform (2), and the tops of the mounting frames are connected to the rotating cylinder (7). A slide (26) is slidably connected through the movable groove, a tensile machine (27) is fixedly installed on the top of the slide (26), a force-bearing end on one side of the top of the tensile machine (27) is fixedly connected to a C-shaped block (36), a sliding tension block (37) is slidably connected to the middle of one side of the C-shaped block (36) through an elliptical groove and a limit column, an arc groove (38) is opened on one side of the bottom end of the sliding tension block (37), a mounting block (41) is fixedly installed on the top of the sliding tension block (37) above the arc groove (38) through a mounting groove and a hexagon socket bolt, a threaded rod (42) is threadedly connected to the center of the mounting block (41), and a measuring mechanism (28) is provided on the side of the slide (26) close to the fixed platform (2); The inner wall of the sliding block (18) is provided with four limiting grooves, and the sliding block (18) is slidably connected to the limiting bar (17) through the limiting grooves. A first screw rod (20) is fixedly connected to one side of the sliding block (18), and a movable rod (21) is threadedly connected to the end of the first screw rod (20). A movable groove is provided at the end of the movable rod (21), and a ball head (22) is movably connected to the end of the movable groove. A sliding rod (23) is slidably connected in the movable groove, and a pressure sensor (25) is abutted against one end of the sliding rod (23) close to the sliding block (18).

2. A test system for applying tension to a hydraulic motor housing according to claim 1, characterized in that: The bottom of the housing (9) is provided with a bearing hole (10), the inner wall of the housing (9) is provided with an arc-shaped cavity inner wall (11), the top of the housing (9) is provided with a sealing end (12), the top of the sealing end (12) is evenly provided with a plurality of threaded holes (13), the width of the sealing end (12) is smaller than the width of the arc-shaped groove (38), and the threaded holes (13) are adapted to the threaded rod (42).

3. The test system for applying tension to a hydraulic motor housing according to claim 1, characterized in that: A first motor (6) is fixedly mounted on the bottom of the fixed platform (2), and an output shaft of the first motor (6) is fixedly connected to the center of the bottom end of the turntable (5).

4. The test system for applying tension to a hydraulic motor housing according to claim 1, characterized in that: Three evenly distributed positioning pins (8) are fixedly connected to the top of the turntable (5) outside the fixed cylinder (7), and the positioning pins (8) correspond to the screw holes at the bottom end of the shell (9).

5. The test system for applying tension to a hydraulic motor housing according to claim 1, characterized in that: A second motor (16) is fixedly installed inside the turntable (5), and the output shaft of the second motor (16) is fixedly connected to the bottom end of the rotating column (15), and the limiting bar (17) is located above the fixed cylinder (7).

6. The test system for applying tension to a hydraulic motor housing according to claim 1, characterized in that: The sliding rod (23) is fixedly connected to a first spring (24) on the side close to the sliding block (18), and the end of the first spring (24) is fixedly connected to the inner wall of the movable groove. The sliding block (18) is rotatably connected to a fastening screw (19) on the side away from the first screw rod (20).

7. The test system for applying tension to a hydraulic motor housing according to claim 1, characterized in that: The measuring mechanism (28) includes a rotating rod (29) and a measuring rod (30). The top of the slide (26) is rotatably connected to one side of the fixed platform (2) with two rotating rods (29). A hollow cavity is provided on one side of the rotating rod (29). The measuring rod (30) is slidably connected in the hollow cavity. A stopper is fixedly connected to the end of the measuring rod (30). A second spring (32) is fixedly connected to the side wall of the hollow cavity. The end of the second spring (32) is fixedly connected to the side wall of one end of the measuring rod (30). A displacement sensor (33) is installed at one end of the second spring (32).

8. The test system for applying tension to a hydraulic motor housing according to claim 7, characterized in that: A third motor (34) is fixedly mounted on the top of the slide (26), an output shaft of the third motor (34) is fixedly connected to a connecting rod (35), an end of the connecting rod (35) is rotatably connected to a connecting shaft, both ends of the connecting shaft are respectively fixedly connected to the side walls of the two rotating rods (29), and a connecting rod (31) is fixedly connected between the opposite surfaces of the two stoppers.

9. The test system for applying tension to a hydraulic motor housing according to claim 1, characterized in that: A fourth motor (39) is fixedly mounted on the top of the C-shaped block (36), an output shaft of the fourth motor (39) passes through the top of the C-shaped block (36), a second screw (40) is fixedly connected to a side of the sliding tension block (37) at the bottom end of the output shaft of the fourth motor (39), and the bottom end of the second screw (40) is rotatably connected to the bottom of the C-shaped block (36).

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