Universal testing machine

Abstract

The utility model discloses a universal testing machine. The universal testing machine comprises a base, a sliding testing frame, a clamping and fixing mechanism and a pair of clamping and fixing mechanisms, the clamping limiting mechanism comprises a pair of clamping bases, correcting inner rods are fixedly connected into the clamping bases, a plurality of compression control boxes which are evenly distributed are fixedly assembled on the outer sides of the correcting inner rods, and matched ejector blocks are slidably assembled in the compression control boxes. The pair of clamping and fixing mechanisms is fixedly assembled on the sides, close to each other, of the pair of clamping bases, each clamping and fixing mechanism comprises a pair of contraction assembly cylinders, and locking and fixing blocks are assembled in the contraction assembly cylinders in a sliding mode. According to the universal testing machine disclosed by the utility model, the clamping limiting mechanism and the clamping and fixing mechanism are arranged, so that a material testing clamp can be conveniently and stably clamped, the situation that the material testing clamp is influenced by a fit clearance to cause assembly deviation is reduced, and the testing accuracy of the universal testing machine is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of universal testing machines, and particularly relates to a universal testing machine. Background Art

[0002] A universal testing machine is a kind of material testing machine integrating functions such as tension, bending, compression, shear, and ring stiffness, and is mainly used for the mechanical testing process of metal and non-metal materials. It can display, record, and print test data in real time. Currently, common universal testing machines mainly consist of a measurement system, a drive system, a control system, and a central processing unit. When in use, the material to be tested is clamped by the measurement system, and the movement of the fixture is controlled by the drive system to conduct tests on the properties such as tension, bending, compression, and shear of the material to be tested.

[0003] Since a universal testing machine can conduct various tests such as tension, bending, compression, and shear on materials, it is necessary to select different material test fixtures according to different test items during the actual application process of the universal testing machine.

[0004] Most of the existing universal testing machines need to use a tubular fixing seat to limit the assembly of the material test fixture during the assembly process, and use bolts or pins to penetrate for limiting the assembly of the tubular fixing seat and the material test fixture. At the same time, during the actual application process, the inner diameter of the tubular fixing seat is generally larger than the outer diameter of the bottom end of the material test fixture, and the two are in clearance fit. This makes it easy for the material test fixture to be misaligned during assembly due to the influence of the fit clearance when only using bolts or pins for cooperation, thus having an adverse impact on the test accuracy of the universal testing machine.

[0005] Therefore, in view of the above technical problems, it is necessary to provide a universal testing machine.

[0006] The information disclosed in this background art section is only intended to enhance the overall understanding of the present utility model and should not be regarded as an admission or any form of suggestion that this information constitutes prior art already known to those of ordinary skill in the art. Summary of the Utility Model

[0007] The purpose of the present utility model is to provide a universal testing machine, which can stably clamp the material test fixture and ensure the material test accuracy of the universal testing machine.

[0008] To achieve the above purpose, a specific embodiment of the present utility model provides a universal testing machine, including: a base, a sliding test frame, a clamping and fixing mechanism, and a pair of clamping and fixing mechanisms.

[0009] A sliding test frame is slidably assembled above the base.

[0010] The clamping and limiting mechanism is fixedly installed between the base and the sliding test frame, and the clamping and limiting mechanism includes a pair of clamping bases, and the pair of clamping bases are respectively installed above the base and below the sliding test frame. A correction inner rod is fixedly connected in the pair of clamping bases, and multiple groups of evenly distributed compression control boxes are fixedly installed on the outer sides of the correction inner rods, and matching top blocks are slidably installed in the multiple groups of compression control boxes.

[0011] A pair of the snap-fit ​​fixing mechanisms are fixedly assembled on one side of a pair of clamping bases close to each other, and the snap-fit ​​fixing mechanisms include a pair of shrinking assembly cylinders, which are symmetrically assembled in the clamping bases, and locking fixing blocks are slidably assembled in the pair of shrinking assembly cylinders.

[0012] In one or more embodiments of the utility model, a pair of the clamping bases are both inserted with material test fixtures. The material to be tested is clamped and fixed by the material test fixtures. A pair of locking and fixing grooves are cut on the outer sides of the pair of material test fixtures, and the locking and fixing grooves are arranged in cooperation with the locking and fixing blocks. The material test fixtures are clamped and fixed by the mutual cooperation of the locking and fixing grooves and the locking and fixing blocks.

[0013] In one or more embodiments of the utility model, a pair of the clamping bases are integrally formed with a fixed base plate on the opposite sides. The clamping base is assembled and fixed by assembling and fixing the fixed base plate. The fixed base plate is provided with a plurality of evenly distributed assembly and fixing holes. It is convenient to assemble and fix the fixed base plate through the assembly and fixing holes.

[0014] In one or more embodiments of the utility model, the length of the correction inner rod is greater than the depth of the inner wall of the clamping base. This facilitates ensuring the stability of the correction inner rod in clamping and limiting the material test fixture. Multiple groups of evenly distributed connecting springs are fixedly connected between the matching top block and the compression control box. The matching top block is supported and reset by the contraction and reset of the multiple groups of connecting springs, thereby facilitating the auxiliary clamping and fixing of the material test fixture by the multiple groups of matching top blocks, thereby reducing the deviation of the material test fixture due to the influence of the matching clearance during the clamping process.

[0015] In one or more embodiments of the utility model, the plurality of groups of compression control boxes are connected to exhaust pipes on one side away from the matching top block. The exhaust pipes serve to connect the compression control boxes with the connecting air pipes, so that the gas in the plurality of groups of compression control boxes can be transported to the connecting air pipes under the compression of the matching top block. The plurality of groups of exhaust pipes are connected to a connecting air pipe. The connecting air pipes serve to connect the plurality of groups of exhaust pipes with the guide air pipe.

[0016] In one or more embodiments of the present utility model, a pair of cooperating airbag layers are fixedly connected to the inner walls of a pair of the clamping bases. The expansion of the pair of cooperating airbag layers is used to assist in the assembly and limit of the material test fixture, ensuring the stability of the assembly and limit of the material test fixture. A guiding air pipe is connected between each of the pair of cooperating airbag layers and the communicating air pipe. The guiding air pipe serves to connect the cooperating airbag layer and the communicating air pipe, facilitating the conveyance of the gas in the communicating air pipe to the cooperating airbag layer along the guiding air pipe, thereby facilitating the control of the expansion of the cooperating airbag layer.

[0017] In one or more embodiments of the present utility model, a pull rod is inserted into the retractable assembly cylinder. One end of the pull rod located inside the retractable assembly cylinder is fixedly connected to the locking and fixing block. By pulling the pull rod, the locking and fixing block is controlled to be pulled and moved, thereby facilitating the detachment of the locking and fixing block from the locking and fixing groove, and thus facilitating the control of the clamping state of the material test fixture. A return spring is connected between the locking and fixing block and the retractable assembly cylinder, and the return spring is sleeved outside the pull rod. The return spring supports and limits the locking and fixing block through contraction and reset.

[0018] In one or more embodiments of the present utility model, a pull ring is fixedly connected to one end of the pull rod located outside the retractable assembly cylinder. The pull rod is controlled to be pulled and moved by controlling the movement of the pull ring. An operation hole is formed in the pull ring. The formation of the operation hole facilitates the pulling control of the pull ring.

[0019] Compared with the prior art, a universal testing machine disclosed by the present utility model can perform convenient and stable clamping on a material test fixture by providing a clamping limit mechanism and a clamping and fixing mechanism, reducing the situation of assembly deviation of the material test fixture affected by the fitting clearance, and improving the test accuracy of the universal testing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a partial structural cross-sectional view of a universal testing machine in an embodiment of the present utility model;

[0022] Figure 2 It is Figure 1 the structural schematic diagram at position A in

[0023] Figure 3This is a schematic diagram of a partial structure of a universal testing machine in an embodiment of the present utility model;

[0024] Figure 4 This is a perspective view of a universal testing machine in an embodiment of the present utility model.

[0025] Main reference numerals description:

[0026] 1 - Base, 101 - Sliding test frame, 2 - Clamping and limiting mechanism, 201 - Clamping base, 202 - Correction inner rod, 203 - Compression control box, 204 - Matching top block, 205 - Material test fixture, 206 - Fixed bottom plate, 207 - Connecting spring, 208 - Exhaust pipe, 209 - Connecting air pipe, 210 - Matching airbag layer, 211 - Guiding air pipe, 3 - Clamping and fixing mechanism, 301 - Shrinkage assembly cylinder, 302 - Locking and fixing block, 303 - Pull rod, 304 - Return spring, 305 - Pull ring. Detailed implementation manners

[0027] In order to enable those skilled in the art of the present technology to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0028] As Figures 1 to 4 shown, a universal testing machine in an embodiment of the present utility model includes: a base 1, a sliding test frame 101, a clamping and fixing mechanism 3, and a pair of clamping and fixing mechanisms 3.

[0029] As Figure 1 shown, a sliding test frame 101 is slidably assembled above the base 1. The sliding test frame 101 is used for assembling and moving control of the material test fixture 205, and through controlling the movement test of the material test fixture 205, tests such as tensile and compression tests of materials are carried out.

[0030] As Figures 1 to 2 shown, the clamping and limiting mechanism 2 is fixedly assembled between the base 1 and the sliding test frame 101. The clamping and limiting mechanism 2 includes a pair of clamping bases 201, and the pair of clamping bases 201 are respectively assembled above the base 1 and below the sliding test frame 101. The clamping base 201 is used for assembling and limiting the material test fixture 205.

[0031] As Figures 1 to 2As shown, a pair of clamping bases 201 are each inserted with a material test fixture 205. The material test fixture 205 is used to clamp and fix the material to be tested.

[0032] Specifically, a pair of locking and fixing grooves are respectively drilled on the outer sides of the pair of material test fixtures 205, and the locking and fixing grooves are arranged in cooperation with the locking and fixing blocks 302. The material test fixture 205 is clamped and fixed through the mutual cooperation of the locking and fixing grooves and the locking and fixing blocks 302.

[0033] As Figure 4 shown, fixed bottom plates 206 are integrally formed on the opposite sides of the pair of clamping bases 201. The clamping bases 201 are assembled and fixed by assembling and fixing the fixed bottom plates 206.

[0034] Among them, a plurality of uniformly distributed assembly and fixing holes are drilled on the fixed bottom plate 206. It is convenient to assemble and fix the fixed bottom plate 206 through the assembly and fixing holes.

[0035] As Figures 1 to 2 shown, a pair of correction inner rods 202 are fixedly connected in each of the pair of clamping bases 201. The correction inner rods 202 play a role in assembly limit and deviation correction for the material test fixture 205.

[0036] It should be noted that the length of the correction inner rod 202 is greater than the depth of the inner wall of the clamping base 201. It is convenient to ensure the stability of the correction inner rod 202 for clamping and limiting the material test fixture 205.

[0037] As Figures 1 to 3 shown, a plurality of groups of uniformly distributed compression control boxes 203 are fixedly assembled on the outer side of the correction inner rod 202. The plurality of groups of compression control boxes 203 play a role in assembly limit and gas storage for the matching top blocks 204.

[0038] As Figures 1 to 3 shown, a matching top block 204 is slidably assembled in each of the plurality of groups of compression control boxes 203. The material test fixture 205 is assisted in assembly limit by the way of the matching top block 204 extruding the inner wall of the material test fixture 205.

[0039] As Figures 1 to 2 shown, a plurality of groups of uniformly distributed connecting springs 207 are fixedly connected between the matching top block 204 and the compression control box 203. The matching top block 204 is supported and reset through the contraction and reset of the plurality of groups of connecting springs 207, so as to facilitate the auxiliary clamping and fixing of the material test fixture 205 through the plurality of groups of matching top blocks 204, and reduce the situation of deviation of the material test fixture 205 due to the influence of the matching gap during the clamping process.

[0040] As Figures 1 to 3As shown, exhaust pipes 208 are connected to the sides of multiple compression control boxes 203 that face away from the mating top blocks 204. The exhaust pipes 208 serve to connect the compression control boxes 203 to the connecting air pipes 209, facilitating the transfer of the gas within the multiple compression control boxes 203 into the connecting air pipes 209 under the compression of the mating top blocks 204.

[0041] As Figures 1 to 3 shown, a connecting air pipe 209 is connected between multiple exhaust pipes 208. The connecting air pipe 209 serves to connect multiple exhaust pipes 208 to the guiding air pipe 211.

[0042] As Figures 1 to 3 shown, a pair of mating airbag layers 210 are fixedly connected to the inner walls of a pair of clamping bases 201. The inflation of the pair of mating airbag layers 210 aids in the auxiliary assembly and positioning of the material test fixture 205, ensuring the stability of the assembly and positioning of the material test fixture 205.

[0043] As Figures 1 to 3 shown, guiding air pipes 211 are connected between a pair of mating airbag layers 210 and the connecting air pipe 209. The guiding air pipes 211 serve to connect the mating airbag layers 210 to the connecting air pipe 209, facilitating the transfer of the gas within the connecting air pipe 209 into the mating airbag layers 210 along the guiding air pipes 211, thereby facilitating the control of the inflation of the mating airbag layers 210.

[0044] As Figures 1 to 2 shown, a pair of clamping and fixing mechanisms 3 are fixedly assembled on the sides of a pair of clamping bases 201 that are adjacent to each other. The clamping and fixing mechanism 3 includes a pair of retractable assembly cylinders 301, which are symmetrically assembled within the clamping bases 201. The retractable assembly cylinders 301 serve to accommodate, position, and guide the locking and fixing blocks 302.

[0045] As Figures 1 to 2 shown, locking and fixing blocks 302 are slidably assembled within a pair of retractable assembly cylinders 301. The locking and fixing blocks 302 cooperate with the locking and fixing grooves to provide clamping and positioning for the material test fixture 205.

[0046] As Figures 1 to 2 shown, a pull rod 303 is inserted into the retractable assembly cylinder 301. One end of the pull rod 303 within the retractable assembly cylinder 301 is fixedly connected to the locking and fixing block 302. By pulling the pull rod 303, the locking and fixing block 302 can be pulled and moved, facilitating the separation of the locking and fixing block 302 from the locking and fixing groove, and thus facilitating the control of the clamping state of the material test fixture 205.

[0047] As Figures 1 to 2As shown, a return spring 304 is connected between the locking fixed block 302 and the retractable assembly cylinder 301, and the return spring 304 is sleeved outside the pull rod 303. The contraction and reset of the return spring 304 play a role in supporting and limiting the locking fixed block 302.

[0048] As Figures 1 to 2 shown, one end of the pull rod 303 located outside the retractable assembly cylinder 301 is fixedly connected with a pull ring 305. The pull rod 303 is controlled to be pulled by controlling the movement of the pull ring 305.

[0049] Specifically, an operation hole is formed in the pull ring 305. The operation hole is formed to facilitate the pulling control of the pull ring 305.

[0050] During specific use, the material test fixture 205 is inserted between the clamping base 201 and the correction inner rod 202 by means of insertion, and the correction inner rod 202 is used to assist in limiting and correcting the fixation of the material test fixture 205. During the process of clamping and fixing the material test fixture 205, the inner wall of the material test fixture 205 is squeezed and limited by the interaction of multiple groups of matching top blocks 204 and connecting springs 207, so that the material test fixture 205 is fixed and limited by multiple groups of matching top blocks 204.

[0051] During the insertion process of the material test fixture 205, multiple groups of matching top blocks 204 squeeze multiple groups of connecting springs 207 under the action of the material test fixture 205, so that multiple groups of matching top blocks 204 compress the air in multiple groups of compression control boxes 203. The air in the compression control box 203 is transported to a pair of matching airbag layers 210 along the exhaust pipe 208, the communication pipe 209, and the guiding pipe 211 under the compression action of the matching top blocks 204, and the outside of the material test fixture 205 is assisted in clamping and limiting by the expansion of the pair of matching airbag layers 210.

[0052] In addition, the material test fixture 205 can be assembled and fixed by the mutual engagement of a pair of locking fixed blocks 302 and the locking fixed grooves on the outside of the material test fixture 205.

[0053] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0054] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A universal testing machine, characterized in that: include: A base, wherein a sliding test frame is slidably mounted on the top of the base; A clamping and limiting mechanism is fixedly installed between the base and the sliding test frame, and the clamping and limiting mechanism includes a pair of clamping bases, which are respectively installed above the base and below the sliding test frame, and a pair of clamping bases are fixedly connected with a correction inner rod, and the outer side of the correction inner rod is fixedly installed with a plurality of groups of uniformly distributed compression control boxes, and the plurality of groups of compression control boxes are slidably installed with matching top blocks; A pair of snap-fit ​​fixing mechanisms are fixedly assembled on one side of a pair of clamping bases close to each other, and the snap-fit ​​fixing mechanisms include a pair of shrinking assembly cylinders, which are symmetrically assembled in the clamping bases, and locking fixing blocks are slidably assembled in the pair of shrinking assembly cylinders.

2. A universal testing machine according to claim 1, characterized in that: A pair of material testing fixtures are inserted into each of the clamping bases, and a pair of locking and fixing grooves are cut on the outer sides of each of the material testing fixtures. The locking and fixing grooves are matched with the locking and fixing blocks.

3. A universal testing machine according to claim 1, characterized in that: A pair of the clamping bases are integrally formed with a fixed bottom plate on one side away from the other, and a plurality of evenly distributed assembly fixing holes are drilled on the fixed bottom plate.

4. A universal testing machine according to claim 1, characterized in that: The length of the correcting inner rod is greater than the depth of the inner wall of the clamping base, and a plurality of groups of evenly distributed connecting springs are fixedly connected between the matching top block and the compression control box.

5. A universal testing machine according to claim 1, characterized in that: The sides of the plurality of compression control boxes facing away from the matching top blocks are all connected with exhaust pipes, and the plurality of exhaust pipes are connected with connecting air pipes.

6. A universal testing machine according to claim 5, characterized in that: A pair of matching airbag layers are fixedly connected to the inner walls of a pair of the clamping bases, and a guide air tube is connected between the pair of matching airbag layers and the connecting air tube.

7. A universal testing machine according to claim 1, characterized in that: A pull rod is inserted in the shrink assembly cylinder, one end of the pull rod located in the shrink assembly cylinder is fixedly connected to the locking block, a return spring is connected between the locking block and the shrink assembly cylinder, and the return spring is sleeved on the outside of the pull rod.

8. A universal testing machine according to any one of claims 2, 3, 4, 5 or 7, characterized in that: A pull rod is inserted in the shrink assembly cylinder, one end of the pull rod located in the shrink assembly cylinder is fixedly connected to the locking block, a return spring is connected between the locking block and the shrink assembly cylinder, and the return spring is sleeved on the outside of the pull rod.

9. A universal testing machine according to claim 7, characterized in that: One end of the pull rod located outside the shrink assembly cylinder is fixedly connected with a pull ring, and an operating hole is opened in the pull ring.

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