A dynamic static universal testing machine

Abstract

The application provides a dynamic and static universal testing machine, which comprises a workbench, a fixed beam assembly, a movable beam assembly, a lifting oil cylinder assembly, a chuck assembly and a driving device, the workbench is located at the bottom, and the fixed beam assembly is installed above the workbench; the lifting oil cylinder assembly is longitudinally arranged on both sides of the workbench body; the bottom end of the lifting oil cylinder assembly is connected with the driving device, and the top end is connected with the movable beam assembly; the lower chuck of the chuck assembly is installed at the bottom of the movable beam assembly. The beneficial effects are as follows: the lifting oil cylinder assembly is used as a supporting component and an executing component, the height of the movable beam assembly is effectively adjusted, the distance between the upper chuck and the lower chuck is conveniently and quickly adjusted to a suitable position, the oil cylinder adding mode on both sides of the movable beam is abandoned, the influence of the oil cylinder on the horizontal position of the movable beam is reduced, the measurement accuracy is improved, and no other structure is arranged outside the lifting oil cylinder assembly, so that the appearance is neat and convenient to arrange.

Description

TECHNICAL FIELD

[0001] The present application relates to a testing device, in particular to a dynamic and static universal testing machine for testing dynamic fatigue performance and static tensile, compression, bending and fatigue mechanical performance of metal materials or non-metal materials. BACKGROUND

[0002] The dynamic and static universal testing machine is also called a fatigue testing machine, which is a machine mainly used for testing the fatigue performance of metal and alloy materials under tensile, compression or tensile and compression alternating load at room temperature. It integrates dynamic fatigue testing, static tensile, bending, compression, shear and other functions, and is an ideal testing equipment for industrial and mining enterprises, scientific research units, colleges and universities, engineering quality supervision stations and other departments. The dynamic and static hydraulic universal testing machine is a conventional form of the universal testing machine.

[0003] The traditional dynamic and static hydraulic universal testing machine includes a main machine, a cylinder and a driving mechanism. The main machine includes a double-column structure, an upper cross beam and a movable cross beam are arranged between the two columns, and a lower chuck and an upper chuck for clamping the material to be tested are respectively fixed on the upper cross beam and the movable cross beam. The upper cross beam serves as a supporting structure for the lower chuck and remains stationary. During testing, the testing space is adjusted by the up-and-down movement of the movable cross beam on which the upper chuck is installed. The existing dynamic and static hydraulic universal testing machine adjusts the movement track of the movable cross beam mainly by installing working cylinders at both ends of the movable cross beam. The driving mechanism adjusts the operation of the working cylinders at both ends to adjust the up-and-down movement of the movable cross beam. This structure has the following defects:

[0004] (1) The working cylinders are installed at both ends of the movable cross beam. When the driving mechanism drives the cylinders to work, the forces on both sides of the movable cylinder are unbalanced, which causes the horizontal position of the movable cross beam to be unstable, affects the clamping effect, and seriously affects the testing accuracy.

[0005] (2) The working cylinders are installed at both ends of the movable cross beam, so that the movable cross beam needs to additionally bear part of the gravity from the working cylinders. This part of the force will cause a certain error between the test result and the actual value, affecting the test effect.

[0006] Therefore, the skilled in the art is committed to developing a dynamic and static universal testing machine that effectively ensures the horizontal stability of the movable cross beam to improve the testing accuracy. SUMMARY

[0007] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present application is to provide a dynamic and static universal testing machine to solve the problem of horizontal instability of the movable cross beam caused by the double-sided cylinders, which affects the testing accuracy.

[0008] In order to solve the above problems, the application provides a dynamic and static universal testing machine, which comprises a workbench, a fixed cross beam assembly, a movable cross beam assembly, a lifting oil cylinder assembly, a chuck assembly and a driving device, the workbench, the movable cross beam assembly and the lifting oil cylinder assembly form a movable support frame of the universal testing machine; wherein the workbench is located at the bottom, the fixed cross beam assembly is installed above the workbench, and the upper chuck of the chuck assembly is fixed; the lifting oil cylinder assembly is longitudinally arranged on both sides of the workbench body; the lifting oil cylinder assembly is supported by the workbench, the bottom end is connected with the driving device, and the top end is connected with the movable cross beam assembly; the lifting oil cylinder is driven to rise and fall by the driving device to control the lifting of the movable cross beam assembly; the lower chuck of the chuck assembly is installed at the bottom of the movable cross beam assembly; when the bottom of the movable cross beam assembly falls, the lower chuck falls with it and tightens with the lower chuck on the fixed cross beam assembly, so that the measured object is clamped.

[0009] Further, the part of the lifting oil cylinder assembly located on both sides of the workbench body is arranged inside the workbench, and the remaining part is exposed outside.

[0010] Further, the lifting oil cylinder assembly penetrates through the fixed cross beam assembly.

[0011] Further, the lifting oil cylinder assembly comprises a cylinder rod, a piston rod, a hydraulic pipe, a sealing device and a guide belt; the cylinder rod is internally provided with a cylinder rod inner cavity with a cavity structure, the cylinder rod inner cavity is sleeved outside the piston rod, one end of the cylinder rod is connected with the movable cross beam assembly, and the other end is externally provided with a locking device; one end of the piston rod is fixedly connected at the bottom of the workbench, and the other end is sleeved into the cylinder rod inner cavity; the sealing device and the guide belt are arranged between the inside of the cylinder rod and the piston rod, and the sealing device is arranged outside the guide belt; the hydraulic pipe is arranged inside the piston rod, one end of the hydraulic pipe is communicated with the cylinder rod inner cavity, and the other end is connected with an external hydraulic pipeline through a joint, so that the lifting of the cylinder rod is realized through oil feeding and returning.

[0012] Further, the locking device is located at the bottom of the fixed cross beam assembly to prevent the cylinder rod from being excessively lifted.

[0013] Further, one end of the cylinder rod penetrates through the fixed cross beam assembly and is connected with the movable cross beam assembly.

[0014] Further, the driving device comprises a solenoid valve, the solenoid valve is installed on the external hydraulic pipeline, is connected with the hydraulic pipe through the external hydraulic pipeline, and controls the oil feeding and returning of the cylinder rod inner cavity.

[0015] Further, the driving device further comprises a throttle valve, the throttle valve is installed on the external hydraulic pipeline, and controls the flow rate and flow of the oil feeding and returning of the cylinder rod inner cavity.

[0016] By implementing the dynamic and static universal testing machine provided by the application, the following technical effects are achieved.

[0017] (1) The lifting oil cylinder assembly is used as a part of the support component of the dynamic and static universal testing machine, and replaces the traditional oil cylinder added separately on both sides of the moving cross beam, so that the height of the moving cross beam assembly can be effectively adjusted, and the distance between the upper and lower clamps can be adjusted to the appropriate position more conveniently and quickly.

[0018] (2) The application eliminates the method of adding oil cylinders on both sides of the moving cross beam, reduces the influence of the oil cylinder on the horizontal position of the moving cross beam, and improves the measurement accuracy.

[0019] (3) The lifting oil cylinder assembly of the application is partially arranged inside the workbench, and the other part simultaneously serves as a support component, without adding other structures outside, so that the appearance is neat and tidy, and the arrangement is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0020] The concept, specific structure and technical effects of the application will be further described below in combination with the drawings, so as to fully understand the purpose, features and effects of the application.

[0021] Figure 1 is a main view structural schematic diagram of the dynamic and static universal testing machine according to the specific embodiment of the application;

[0022] Figure 2 is a side view structural schematic diagram of the dynamic and static universal testing machine according to the specific embodiment of the application;

[0023] Figure 3 is a schematic diagram of the lifting oil cylinder assembly according to the specific embodiment of the application;

[0024] Figure 4 is a schematic diagram of the electromagnetic valve control structure according to the specific embodiment of the application;

[0025] In the drawings:

[0026] 1, workbench; 2, fixed cross beam assembly; 3, moving cross beam assembly; 4, lifting oil cylinder assembly; 40, cylinder rod; 400, cylinder rod inner cavity; 401, locking device; 41, piston rod; 42, hydraulic pipe; 43, sealing device; 44, guide belt; 45, clamping sleeve type hard pipe joint; 50, upper clamp; 51, lower clamp; 60, electromagnetic reversing valve; 61, throttle valve; 62, external hydraulic pipe; P, rising pipe; R, falling pipe. DETAILED DESCRIPTION

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] The technical solution of the present invention will be described in detail below using specific embodiments.

[0029] like Figures 1-3 The dynamic and static universal testing machine shown includes a worktable 1, a fixed crossbeam assembly 2, a movable crossbeam assembly 3, a lifting cylinder assembly 4, a clamp assembly, and a drive device. The worktable 1, the movable crossbeam assembly 3, and the lifting cylinder assembly 4 form a movable support frame for the universal testing machine. The worktable 1 is located at the bottom and is equipped with various control and operation components. The fixed crossbeam assembly 2 is installed above it to fix the upper clamp 50 in the clamp assembly. The lifting cylinder assembly 4 is longitudinally arranged on both sides of the worktable 1. The lifting cylinder assembly 4 is supported by the worktable 1, with its bottom end connected to the drive device and its top end connected to the movable crossbeam assembly 3. The drive device drives the lifting cylinder to raise and lower, thereby controlling the raising and lowering of the movable crossbeam assembly 3. The lower clamp 51 of the clamp assembly is installed at the bottom of the movable crossbeam assembly 3. When the bottom of the movable crossbeam assembly 3 lowers, the lower clamp 51 also lowers and clamps with the lower clamp 51 on the fixed crossbeam assembly 2, thereby clamping the object to be tested.

[0030] The lifting cylinder assembly 4 is located inside the worktable 1 on both sides of the worktable 1, while the rest is exposed to the outside.

[0031] The lifting cylinder assembly 4 includes a cylinder rod 40, a piston rod 41, a hydraulic pipe 42, a sealing device 43, and a guide belt 44. The cylinder rod 40 has a cylinder rod inner cavity 400 with a cavity structure inside, which is fitted outside the piston rod 41. One end of the cylinder body is connected to the fixed crossbeam assembly 2 and the movable crossbeam assembly 3, and the other end is equipped with a locking device 401. One end of the piston rod 41 is fixedly connected to the bottom of the worktable 1, and the other end is fitted into the cylinder rod inner cavity 400. A sealing device 43 and a guide belt 44 are installed between the inside of the cylinder rod 40 and the piston rod 41. The sealing device 43 is located outside the guide belt 44. The hydraulic pipe 42 is located inside the piston rod 41, with one end connected to the cylinder rod inner cavity 400 and the other end connected to the external hydraulic pipeline 62 through a compression fitting 45. The lifting of the cylinder rod 40 is achieved by the inlet and outlet of oil.

[0032] The locking device 401 is located at the bottom of the fixed crossbeam assembly 2 to prevent the cylinder rod 40 from being raised excessively.

[0033] like Figure 3As shown, the drive device includes an electromagnetic directional valve 60, which is installed on an external hydraulic line 62 and connected to the hydraulic line 42 of the lifting cylinder assembly 4 through the external hydraulic line 62 to control the inlet and outlet oil of the cylinder rod cavity 400.

[0034] like Figure 3 As shown, the drive unit also includes a throttle valve 61, which is installed on the external hydraulic line 62 to control the flow rate and volume of oil entering and exiting the cylinder rod cavity 400.

[0035] Based on the above structure, when it is necessary to clamp the object to be inspected, the solenoid directional valve 60 switches the descending pipeline R in the external hydraulic pipeline 62, the cylinder rod cavity 400 returns oil, the cylinder rod 40 descends, driving the moving crossbeam assembly 3 to descend, thereby controlling the upper chuck 50 to descend and cooperate with the lower chuck 51 to clamp the object to be inspected; when it is necessary to release the object to be inspected, the solenoid directional valve 60 switches the ascending pipeline P in the external hydraulic pipeline 62, the cylinder rod cavity 400 enters oil, the cylinder rod 40 rises, driving the moving crossbeam assembly 3 to rise until the locking device is locked below the fixed crossbeam assembly 2, and the lifting ends.

[0036] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A dynamic and static universal testing machine, comprising a workbench, a fixed beam assembly, a movable beam assembly, a lifting cylinder assembly, a chuck assembly and a driving device, characterized in that, the workbench, the movable beam assembly and the lifting cylinder assembly form a movable support frame of the universal testing machine; wherein the workbench is located at the bottom, and the fixed beam assembly is installed above the workbench; the lifting cylinder assembly is longitudinally arranged on both sides of the workbench body; the lifting cylinder assembly is supported by the workbench, and the bottom end is connected with the driving device, and the top end is connected with the movable beam assembly; the lower chuck of the chuck assembly is installed at the bottom of the movable beam assembly. The lifting cylinder assembly passes through the fixed beam assembly; the lifting cylinder assembly comprises a cylinder rod, one end of which passes through the fixed beam assembly and is connected with the movable beam assembly.

2. The dynamic and static universal testing machine according to claim 1, characterized in that, the part of the lifting cylinder assembly located on both sides of the workbench body is arranged inside the workbench, and the remaining part is exposed outside.

3. The dynamic and static universal testing machine according to claim 1, characterized in that, the lifting cylinder assembly comprises a cylinder rod, a piston rod, a hydraulic pipe, a sealing device and a guide belt; the cylinder rod has a cylinder inner cavity with a cavity structure arranged inside, the cylinder inner cavity is sleeved outside the piston rod, one end of the cylinder rod is connected with the movable beam assembly, and the other end is externally provided with a locking device; one end of the piston rod is fixedly connected at the bottom of the workbench, and the other end is sleeved into the cylinder inner cavity; the sealing device and the guide belt are arranged between the inside of the cylinder rod and the piston rod, and the sealing device is arranged outside the guide belt; the hydraulic pipe is arranged inside the piston rod, one end of which is communicated with the cylinder inner cavity, and the other end is connected with the external hydraulic pipeline through a joint.

4. The dynamic and static universal testing machine according to claim 3, characterized in that, the locking device is located at the bottom of the fixed beam assembly.

5. The dynamic and static universal testing machine according to claim 3, characterized in that, the driving device comprises a solenoid valve, which is installed on the external hydraulic pipeline, connected with the hydraulic pipe through the external hydraulic pipeline, and controls the oil inlet and return of the cylinder inner cavity.

6. The dynamic and static universal testing machine according to claim 3, characterized in that, the driving device further comprises a throttle valve, which is installed on the external hydraulic pipeline and controls the flow rate and flow of the oil inlet and return of the cylinder inner cavity.

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