A horizontal force bidirectional support system for a compression shear testing machine

Abstract

The present invention relates to the technical field of compression shear testing machines, and specifically to a horizontal force bidirectional support system of a compression shear testing machine, the horizontal force bidirectional support system of the compression shear testing machine comprising a machine base, a shear plate, a lateral loading mechanism, a vertical loading mechanism and a force sensor, a first station and a first guide rail are arranged on the machine base; a second station is arranged on the top of the shear plate, the second station and the first station are arranged at intervals in the vertical direction, and both are used to place a test piece; the shear plate is arranged on the first guide rail for horizontal sliding; the lateral loading mechanism is arranged on the shear plate, and is used to apply a lateral loading force to the shear plate; the vertical loading mechanism is used to apply a vertical loading force to the shear plate; the force sensor is arranged on the force transmission path of the lateral loading mechanism and the shear plate, and is used to measure the shear force. By arranging the lateral loading mechanism on the shear plate, when in use, the lateral loading mechanism will not be subjected to the deflection force generated by the axial floating of the shear plate, thereby avoiding affecting the test process.

Description

Technical Field

[0001] The invention relates to the technical field of compression shear testing machines, in particular to a horizontal force bidirectional support system for a compression shear testing machine. Background Art

[0002] The compression shear testing machine is a device used to test the mechanical properties of materials under compression and shear force. It is widely used in engineering structures, scientific research, industrial production and other fields. It provides an important basis for material selection and engineering design through precise mechanical property testing.

[0003] In the related art, for example, Chinese patent CN109752243B discloses a compression shear tester. When the compression shear tester performs a shear test on a rubber bearing, the rubber bearing is placed in a bearing placement space formed between the shear surface of the swing arm and the shear plate. The vertical loading mechanism applies a vertical loading force to the rubber bearing through the shear plate to simulate the bridge weight. The shear loading mechanism applies a horizontal shear force to the rubber bearing through the shear plate to analyze the force of the swing arm device. The swing arm shear surface of the swing arm device is subjected to a horizontal friction force F1 of the rubber bearing, and the force sensor applies a pulling force F2 to the swing arm device. F1 is the same as the shear force of the shear plate on the rubber bearing, but in the opposite direction. In addition, under the comprehensive effect Under the force, the pendulum itself also has a tendency to swing around the axis of the hinge shaft. Assuming the force f that makes the pendulum swing around the axis of the hinge shaft, it should be F2=F1+f. Therefore, the size of the f value affects the measurement accuracy of the shear force. Assuming the vertical distance L between the axis of the hinge shaft and the shear surface of the pendulum, the radius of the hinge shaft is r, the loading force of the vertical loading mechanism is N, and the torque of the pendulum device is balanced, then μNr=fL, where μ represents the friction coefficient at the hinge shaft, so f=μNr / L. Since the radius r of the hinge shaft is smaller than the vertical distance L between the axis of the hinge shaft and the shear surface of the pendulum, f is smaller than μN, thereby ensuring the measurement accuracy of the shear force by the force sensor.

[0004] Although the above-mentioned compression shear testing machine can improve the measurement accuracy of the shear force by the force sensor to a certain extent, it is found in the actual test process that in order to cope with the axial floating of the shear plate, a pin floating mechanism is usually set at the connection position between the oil cylinder of the shear actuator and the shear plate. As a result, when the shear plate applies compression shear force to the rubber bearing, a deflection force is generated due to the axial floating of the shear plate, which can easily damage the oil cylinder of the shear actuator and affect the test progress. Summary of the invention

[0005] Based on this, it is necessary to provide a horizontal force bidirectional support system for a compression shear testing machine in order to address the problem of poor reliability of the current compression shear testing machine during the test process.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A horizontal force bidirectional support system for a compression shear tester, the horizontal force bidirectional support system for the compression shear tester comprising a machine base, a shear plate, a lateral loading mechanism, a vertical loading mechanism and a force sensor, wherein a first station and a first guide rail are arranged on the machine base, a second station is arranged on the top of the shear plate, the second station and the first station are arranged at intervals in the vertical direction, and are both used to place a workpiece to be tested; the first guide rail is extended in the horizontal direction; the shear plate is horizontally and slidably arranged on the first guide rail, and has a corresponding first position and a second position before and after sliding, when in the first position, the second station and the first station are staggered, and when in the second position, the second station and the first station are correspondingly arranged; the lateral loading mechanism is arranged on the shear plate, and is configured to apply a lateral loading force to the shear plate; the vertical loading mechanism is configured to apply a vertical loading force to the shear plate; the force sensor is arranged on the force transmission path of the lateral loading mechanism and the shear plate, and is used to measure the shear force.

[0008] Further, the transverse loading mechanism includes a push rod, a second guide rail, a transverse loading cylinder and a slider, the push rod is fixedly arranged on the first guide rail; the second guide rail is fixedly arranged on the shear plate and is arranged parallel to the first guide rail; the transverse loading cylinder has a shear measurement state, and when in the shear measurement state, the output direction of the transverse loading cylinder is arranged parallel to the extension direction of the second guide rail, and the output end of the transverse loading cylinder and the push rod are arranged opposite to each other; the slider is slidably arranged on the second guide rail and is located between the output end of the transverse loading cylinder and the push rod, and the slider is configured to form a stop fit with the push rod and the output end of the transverse loading cylinder.

[0009] Furthermore, the transverse loading cylinder also has an angle measurement state. When in the angle measurement state, the output direction of the transverse loading cylinder is set along the vertical direction, and the output end of the transverse loading cylinder is configured to form a stop cooperation with the machine base; the horizontal force bidirectional support system of the compression and shear testing machine also includes a switching mechanism, and the switching mechanism is configured to switch the working state of the transverse loading cylinder between the shear measurement state and the angle measurement state according to measurement requirements.

[0010] Further, the switching mechanism includes a rotating shaft and a locking assembly, the rotating shaft is horizontally arranged on the shear plate, the axis of the rotating shaft and the extension direction of the second guide rail are perpendicularly arranged, the rotating shaft can elastically slide along its own axial direction, and has corresponding third and fourth positions before and after sliding, and can also rotate on its own, and has corresponding fifth and sixth positions before and after rotation; the locking assembly has a locked state and an unlocked state; when the transverse loading cylinder is in the shear measurement state, the locking assembly is in the locked state, and the rotating shaft is locked in the third position and the fifth position at the same time; when the transverse loading cylinder is in the rotation angle measurement state, the locking assembly is in the locked state, and the rotating shaft is locked in the third position and the sixth position at the same time; when the rotating shaft is in the fourth position, the locking assembly is in the unlocked state.

[0011] Furthermore, the locking assembly includes a clamping block and two clamping holes, the clamping block is fixedly arranged on the rotating shaft; the two clamping holes are opened on the shear plate and arranged at intervals along the circumferential direction, and the clamping holes are configured to form a keyway fit with the clamping block.

[0012] Furthermore, the switching mechanism further includes an elastic member, wherein the elastic member is connected between the rotating shaft and the shear plate, and under the action of the elastic member, the rotating shaft has a tendency to slide along its own axial direction.

[0013] Furthermore, the horizontal force bidirectional support system of the compression-shear testing machine also includes a driving mechanism, and the driving mechanism is configured to drive the shear plate to switch between the first position and the second position.

[0014] Furthermore, the driving mechanism includes a moving trolley and a pin floating assembly, the moving trolley is slidably arranged on the first guide rail, and the moving trolley is connected to the shear plate through the pin floating assembly.

[0015] Furthermore, the vertical loading mechanism includes a baffle and a vertical loading cylinder, the baffle is fixedly arranged on the machine base and located above the first workstation, and is configured to form a stopper with the workpiece to be tested located at the second workstation; the vertical loading cylinder is arranged on the machine base and located below the first workstation, the output direction of the vertical loading cylinder is arranged upward in the vertical direction, and is configured to form a stopper with the workpiece to be tested located at the first workstation.

[0016] Furthermore, a friction portion is provided on the surface of the shear plate in contact with the workpiece to be tested, and the friction portion is configured to increase the friction force between the workpiece to be tested and the shear plate.

[0017] The beneficial effects of the present invention are:

[0018] When using a horizontal force bidirectional support system of a compression shear tester provided by the present invention, firstly, two pieces to be tested are placed at the first station and the second station respectively, and then the shear plate is driven to move from the first position to the second position, so that the two pieces to be tested are arranged correspondingly in the vertical direction, and then a vertical loading force is applied to the shear plate by a vertical loading mechanism to clamp the two pieces to be tested, and then a lateral loading force is applied to the shear plate by a lateral loading mechanism, and the shear force is measured by a force sensor. By arranging the lateral loading mechanism on the shear plate, when in use, the lateral loading mechanism will not be subjected to the deflection force generated by the axial floating of the shear plate, which is beneficial to improving the service life of the lateral loading mechanism and can ensure the normal progress of the test process.

[0019] Furthermore, by providing the lateral loading cylinder with an angle measurement state, it is beneficial to improve the application scope of the horizontal force bidirectional support system of the compression and shear testing machine while achieving dual uses of one machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the three-dimensional structure of a horizontal force bidirectional support system of a compression shear tester provided by an embodiment of the present invention when the lateral loading cylinder is in a shear measurement state;

[0021] Figure 2 for Figure 1 A schematic diagram of the partially enlarged structure at center A;

[0022] Figure 3 A schematic diagram of the three-dimensional structure of a horizontal force bidirectional support system of a compression-shear testing machine provided by an embodiment of the present invention when the lateral loading cylinder is in an angle measurement state.

[0023] in:

[0024] 1. The first guide rail;

[0025] 2. Shear plate; 201. Vertical plate; 21. Friction strip;

[0026] 3. Transverse loading mechanism; 31. Ejector rod; 32. Second guide rail; 33. Transverse loading cylinder; 34. Sliding block; 35. Mounting seat;

[0027] 4. Switching mechanism; 41. Rotating shaft; 42. Locking assembly; 421. Block; 422. Clamping hole; 43. Compression spring;

[0028] 5. Driving mechanism; 51. Moving trolley; 511. Axle; 512. Wheel; 513. Slide rail; 52. Driving motor; 53. Transmission belt; 54. First pulley; 55. Pin floating assembly; 551. Base; 5511. Slide groove; 552. Connecting rod; 5521. Clamp; 56. Locking plate. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned herein, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] like Figures 1 to 3As shown, the horizontal force bidirectional support system of the compression shear test machine provided by one embodiment of the present invention is used for shear test, and is configured to include a machine base (not shown), a shear plate 2, a lateral loading mechanism 3, a vertical loading mechanism (not shown) and a force sensor (not shown), a first station and a first guide rail 1 are arranged on the machine base, a second station is arranged on the top of the shear plate 2, the second station and the first station are arranged at intervals in the vertical direction, and both are used to place the test piece; the first guide rail 1 is extended in the horizontal direction; the shear plate 2 is horizontally and slidably arranged on the first guide rail 1, and has corresponding first and second positions before and after sliding, when in the first position, the second station and the first station are staggered, and when in the second position, the second station and the first station are correspondingly arranged; the lateral loading mechanism 3 is arranged on the shear plate 2, and is configured to be able to apply a lateral loading force to the shear plate 2; the vertical loading mechanism is configured to be able to apply a vertical loading force to the shear plate 2; the force sensor is arranged on the force transmission path of the lateral loading mechanism 3 and the shear plate 2, and is used to measure the shear force.

[0033] Specifically in this embodiment, Figure 1 As shown, the first guide rail 1 is configured as a rectangular frame structure, and is horizontally and fixedly arranged on the machine base during installation; the shear plate 2 is configured as an "Ω"-shaped plate structure, and the opening is configured downward, and the shear plate 2 has a main board part and two sub-board parts symmetrically arranged about the main board part, wherein the main board part is configured as a flat plate structure, the sub-board part is configured as an L-shaped structure, and the second workstation is configured at the top of the main board part.

[0034] like Figure 1 As shown, at this time, the shear plate 2 is in the first position, the second station and the first station are staggered along the length direction of the first guide rail 1, and the second station is located in front of the first station.

[0035] When in use, first place the two pieces to be tested at the first station and the second station respectively, then drive the shear plate 2 to move backward along the first guide rail 1 to move from the first position to the second position; when the shear plate 2 moves to the second position, the second station and the first station are arranged correspondingly in the vertical direction, and the two pieces to be tested are arranged correspondingly in the vertical direction; then apply a vertical loading force to the shear plate 2 through the vertical loading mechanism to clamp the two pieces to be tested; then apply a lateral loading force to the shear plate 2 through the lateral loading mechanism 3, and measure the shear force through the force sensor. By setting the lateral loading mechanism 3 on the shear plate 2, when in use, the lateral loading mechanism 3 will not be subjected to the deflection force caused by the axial floating of the shear plate 2, which is beneficial to improving the service life of the lateral loading mechanism 3 while ensuring the normal progress of the test process.

[0036] In some embodiments, the transverse loading mechanism 3 is configured to include a push rod 31, a second guide rail 32, a transverse loading cylinder 33 and a slider 34. The push rod 31 is fixedly set on the first guide rail 1; the second guide rail 32 is fixedly set on the shear plate 2 and is arranged parallel to the first guide rail 1; the transverse loading cylinder 33 has a shear measurement state. When in the shear measurement state, the output direction of the transverse loading cylinder 33 is arranged parallel to the extension direction of the second guide rail 32, and the output end of the transverse loading cylinder 33 and the push rod 31 are arranged opposite to each other; the slider 34 is slidably set on the second guide rail 32, and is located between the output end of the transverse loading cylinder 33 and the push rod 31. The slider 34 is configured to form a stop fit with the push rod 31 and the output end of the transverse loading cylinder 33.

[0037] Specifically in this embodiment, Figure 1 As shown, the push rod 31 is configured as a round rod structure and is horizontally arranged at the top of the rear side of the first guide rail 1, and the axial direction of the push rod 31 is arranged parallel to the extension direction of the first guide rail 1; the second guide rail 32 is configured as an "I"-shaped strip structure and is horizontally arranged on the horizontal part of the sub-plate part; in order to facilitate the sliding fit between the slider 34 and the second guide rail 32, an "I"-shaped sliding hole is opened on the front and rear side walls of the slider 34, and the bottom of the sliding hole passes through the bottom of the slider 34. When installed, the slider 34 is slidably sleeved on the second guide rail 32 through the sliding hole.

[0038] like Figure 1 As shown, at this time, the transverse loading cylinder 33 is in a shear measurement state, the fixed end of the transverse loading cylinder 33 is located at the front side, and the output shaft of the transverse loading cylinder 33 is located at the rear side.

[0039] More specifically, the force sensor may be disposed at the front end of the push rod 31 .

[0040] It can be understood that the measuring force sensor can also be set at the rear side wall of the slider 34 and the position corresponding to the height of the front end of the push rod 31, and can also be set at the front side wall of the slider 34 and the position corresponding to the height of the output shaft of the transverse loading cylinder 33, and can also be set on the output shaft of the transverse loading cylinder 33.

[0041] It can be understood that in order to improve the force uniformity of the shear plate 2 and improve the test measurement accuracy, the number of the push rod 31, the second guide rail 32, the transverse loading cylinder 33 and the slider 34 is set to two, and the two push rods 31, the two second guide rails 32, the two transverse loading cylinders 33 and the two sliders 34 are symmetrically arranged.

[0042] During use, when the shear plate 2 moves to the second position, the output shaft of the transverse loading cylinder 33 and the push rod 31 are pushed on the front and rear side walls of the slider 34 respectively; then the vertical loading force is applied to the shear plate 2 through the vertical loading mechanism to clamp the two test pieces; then the transverse loading cylinder 33 is started, and the output shaft of the transverse loading cylinder 33 is extended; in the process of the output shaft of the transverse loading cylinder 33 extending, the shear plate 2 moves forward under the obstruction of the slider 34, and synchronously drives the two test pieces to move forward at one end close to the shear plate 2, so that the test pieces produce a compression shear effect; when the test pieces are deformed, the shear force is measured in real time by the force sensor.

[0043] In a further embodiment, the transverse loading cylinder 33 also has an angle measurement state. When in the angle measurement state, the output direction of the transverse loading cylinder 33 is set in the vertical direction, and the output end of the transverse loading cylinder 33 is configured to form a stopper with the machine base; the horizontal force bidirectional support system of the compression and shear testing machine is configured to also include a switching mechanism 4, and the switching mechanism 4 is configured to be able to switch the working state of the transverse loading cylinder 33 between the shear measurement state and the angle measurement state according to the measurement requirements.

[0044] Specifically in this embodiment, the measuring force sensor is arranged on the output shaft of the transverse loading cylinder 33 .

[0045] like Figure 3 As shown, at this time, the transverse loading cylinder 33 is in the angle measuring state, the fixed end of the transverse loading cylinder 33 is located on the upper side, and the output shaft of the transverse loading cylinder 33 is located on the lower side.

[0046] When in use, the shear plate 2 is in the first position; then the vertical loading force is applied to the shear plate 2 through the vertical loading mechanism to clamp the two test pieces; then the transverse loading cylinder 33 is started, and the output shaft of the transverse loading cylinder 33 extends; in the process of the output shaft of the transverse loading cylinder 33 extending, the shear plate 2 is synchronously driven to rotate in the counterclockwise direction, and the shear plate 2 synchronously drives the edges of the two test pieces to produce two opposite deformations of compression and rebound; when the test pieces are deformed, the shear force is measured in real time by the force sensor.

[0047] In a further embodiment, the switching mechanism 4 is configured to include a rotating shaft 41 and a locking assembly 42. The rotating shaft 41 is horizontally arranged on the shear plate 2, and the axis of the rotating shaft 41 is perpendicular to the extension direction of the second guide rail 32. The rotating shaft 41 can elastically slide along its own axial direction and has a corresponding third position and fourth position before and after sliding, and can also rotate on its own and has a corresponding fifth position and sixth position before and after rotation; the locking assembly 42 has a locked state and an unlocked state; when the transverse loading cylinder 33 is in the shear measurement state, the locking assembly 42 is in a locked state, and the rotating shaft 41 is locked in the third position and the fifth position at the same time; when the transverse loading cylinder 33 is in the angle measurement state, the locking assembly 42 is in a locked state, and the rotating shaft 41 is locked in the third position and the sixth position at the same time; when the rotating shaft 41 is in the fourth position, the locking assembly 42 is in an unlocked state.

[0048] Specifically in this embodiment, Figure 2 As shown, to facilitate the installation of the rotating shaft 41, two vertical plates 201 are vertically arranged on the top of the horizontal part of the sub-plate part, and the two vertical plates 201 are spaced apart along an extension direction perpendicular to the second guide rail 32. The plate surface of the vertical plate 201 and the vertical part of the sub-plate part are arranged in parallel. When installed, the rotating shaft 41 is arranged so that the left end passes through the vertical plate 201 on the left side, and the right end passes through the vertical plate 201 on the right side.

[0049] In order to facilitate the installation of the transverse loading cylinder 33 on the rotating shaft 41, the switching mechanism 4 is configured to also include a mounting seat 35, and the mounting seat 35 is configured to have an L-shaped base part and a flat mounting part, wherein the mounting part is fixed and vertically arranged on the front side panel surface of the vertical part of the base part and the top panel surface of the horizontal part of the base part during installation, and the mounting part is configured to be sleeved on the rotating shaft 41 during installation, and is located between the two vertical plates 201, and forms a spline fit with the rotating shaft 41; the base part is located between the two vertical plates 201, and under the restriction of the two vertical plates 201, the mounting seat 35 can only rotate around the rotating shaft 41; the fixed end of the transverse loading cylinder 33 is vertically arranged on the rear side panel surface of the vertical part of the base part.

[0050] like Figure 2 As shown, at this time, the rotating shaft 41 is located at the third position and the fifth position at the same time.

[0051] Initially, the locking assembly 42 is in a locked state, and the transverse loading cylinder 33 is in a shear measurement state.

[0052] In the process of switching the working state of the transverse loading cylinder 33, first push the rotating shaft 41 to move to the left side to move from the third position to the fourth position; when the rotating shaft 41 is in the fourth position, the locking assembly 42 is in the unlocked state, and then rotate the rotating shaft 41 to move from the fifth position to the sixth position; when the rotating shaft 41 is in the sixth position, the locking assembly 42 is in the unlocked state; then push the rotating shaft 41 to move to the right side to move from the fourth position to the third position; when the rotating shaft 41 is in the third position, the locking assembly 42 is in the locked state, and the transverse loading cylinder 33 is in the angle measuring state.

[0053] In a further embodiment, the locking assembly 42 is configured to include a block 421 and two holes 422, the block 421 is fixedly disposed on the rotating shaft 41; the two holes 422 are opened on the shear plate 2 and are arranged at intervals along the circumferential direction, and the holes 422 are configured to form a keyway fit with the block 421.

[0054] Specifically in this embodiment, Figure 2 As shown, the clamping block 421 is arranged in a rectangular structure and is fixedly arranged on the circumferential side wall of the left end of the rotating shaft 41; two clamping holes 422 are vertically opened on the plate surface of the left vertical plate 201, and the two clamping blocks 421 are arranged 90 degrees offset along the circumferential direction, one of the clamping holes 422 is arranged vertically upward, and the other clamping hole 422 is arranged horizontally to the left.

[0055] like Figure 2 As shown, the transverse loading cylinder 33 is in a shear measurement state, at which time the clamping block 421 is engaged with the clamping block 421 located on the upper side, and the locking assembly 42 is in a locked state.

[0056] In the process of switching the working state of the transverse loading cylinder 33, the rotating shaft 41 is first pushed to move to the left side to move from the third position to the fourth position; when the rotating shaft 41 is in the fourth position, the block 421 and the block 421 located on the upper side are disengaged, so that the locking assembly 42 is in an unlocked state, and then the rotating shaft 41 is driven to rotate 90 degrees counterclockwise to move from the fifth position to the sixth position; when the rotating shaft 41 is in the sixth position, the block 421 and the card hole 422 located on the left are correspondingly arranged, and the locking assembly 42 is in an unlocked state; then the rotating shaft 41 is pushed to move to the right side to move from the fourth position to the third position; when the rotating shaft 41 is in the third position, the block 421 and the block 421 located on the left side are engaged, so that the locking assembly 42 is in a locked state, and the output shaft of the transverse loading cylinder 33 is arranged downward in the vertical direction, and the transverse loading cylinder 33 is in an angle measuring state.

[0057] In other embodiments, the switching mechanism 4 is configured to further include an elastic member, which is connected between the rotating shaft 41 and the shear plate 2. Under the action of the elastic member, the rotating shaft 41 has a tendency to slide along its own axial direction.

[0058] Specifically in this embodiment, the elastic member can be configured as a compression spring 43, such as Figure 2 As shown, the compression spring 43 is arranged to be sleeved on the right end portion of the rotating shaft 41 during installation, and the left end abuts against the right end surface of the right vertical plate 201, and the right end abuts against the rotating shaft 41. Under the action of the compression spring 43, the rotating shaft 41 has a tendency to move to the right along its own axial direction, thereby further enhancing the connection strength between the clamping block 421 and the clamping hole 422, and improving the stability of the lateral loading cylinder 33 when it is in the shear measurement state or the angle measurement state.

[0059] In other embodiments, the horizontal force bidirectional support system of the compression-shear testing machine is configured to further include a driving mechanism 5, and the driving mechanism 5 is configured to drive the shear plate 2 to switch between the first position and the second position.

[0060] In a further embodiment, the driving mechanism 5 is configured to include a moving trolley 51 and a pin floating assembly 55 , the moving trolley 51 is slidably disposed on the first guide rail 1 , and the moving trolley 51 is connected to the shear plate 2 via the pin floating assembly 55 .

[0061] Specifically in this embodiment, Figure 1 As shown, the moving trolley 51 is configured as an L-shaped plate structure, and the top of the moving trolley 51 is configured as a Z-shaped step surface, and the lower surface of the step surface is located on the rear side, and the higher surface of the step surface is located on the front side. The moving trolley 51 is horizontally arranged on the first guide rail 1 when in use, and an axle 511 is inserted at the bottom of the moving trolley 51. The axle 511 is horizontally arranged, and the axis of the axle 511 is perpendicular to the extension direction of the first guide rail 1. The axle 511 can rotate around its own axis. There are two axles 511, which are spaced apart along the extension direction of the first guide rail 1, and wheels 512 are fixedly sleeved at both ends of each axle 511, and the wheels 512 are rollingly arranged on the first guide rail 1.

[0062] In order to facilitate the sliding of the moving cart 51 along the first guide rail 1, a first pulley 54 is fixedly sleeved on the axle 511 located on the front side, a driving motor 52 is arranged on the moving cart 51, and a second pulley is fixedly sleeved on the motor shaft of the driving motor 52. The second pulley and the first pulley 54 are connected by a transmission belt 53.

[0063] The pin floating assembly 55 is configured as a symmetrical structure, and is configured to include a base 551 and two connecting rods 552, such as Figure 3As shown, the base 551 is set as a "C"-shaped block structure with the opening facing upwards; the connecting rod 552 is set as a round rod structure and is vertically penetrated through the front and rear side walls of the base 551 during installation. The two connecting rods 552 are spaced and symmetrically arranged. The front end of the connecting rod 552 is fixed on the base 551 by a nut. At the rear end of each connecting rod 552, a chuck 5521 is fixedly arranged. The chuck 5521 is set as a C-shaped structure with the opening facing the rear side. At the opening of each chuck 5521, a pin shaft is vertically arranged. The pin shaft is set to vertically penetrate through the plate surface of the main board part during installation, and the pin shaft and the shear plate 2 can slide relative to each other.

[0064] To prevent the transverse loading cylinder 33 from driving the moving trolley 51 to move when extending in the vertical direction, as Figure 3 shown, on the lower surface of the top of the moving trolley 51, a slide rail 513 is horizontally arranged. The slide rail 513 extends along the extension direction parallel to the first guide rail 1. The number of the slide rails 513 is two, and they are spaced along the direction perpendicular to the extension direction of the first guide rail 1; at the bottom of the base 551, two sliding grooves 5511 are spaced apart. The base 551 is set to be slidably sleeved on the slide rail 513 through the sliding grooves 5511 during installation; as Figure 1 shown, on the lower surface of the top of the moving trolley 51, at the rear side, a locking plate 56 is bolted. The locking plate 56 is set as a strip-shaped structure and extends along the direction perpendicular to the extension direction of the first guide rail 1. A strip-shaped groove for clamping the base 551 is formed between the locking plate 56 and the upper surface of the top of the moving trolley 51.

[0065] During use, start the driving motor 52. The driving motor 52 drives the first pulley 54 to rotate forward through the second pulley and the transmission belt 53. The first pulley 54 drives the two wheels 512 thereon to rotate forward through the axle 511, so as to drive the moving trolley 51 to move backward along the first guide rail 1 and move from the first position to the second position; during reset, start the driving motor 52. The driving motor 52 drives the first pulley 54 to rotate backward through the second pulley and the transmission belt 53. The first pulley 54 drives the two wheels 512 thereon to rotate backward through the axle 511, so as to drive the moving trolley 51 to move forward along the first guide rail 1 and move from the second position to the first position.

[0066] When switching from the shear measurement state to the angle measurement state, first remove the locking plate 56 from the moving trolley 51, and then start the driving motor 52. The driving motor 52 drives the first pulley 54 to rotate backward through the second pulley and the transmission belt 53. The first pulley 54 drives the two wheels 512 thereon to rotate backward through the axle 511, so as to drive the moving trolley 51 to move forward along the first guide rail 1, so that the base 551 and the moving trolley 51 are spaced apart to avoid interference.

[0067] It can be understood that the first pulley 54 can be replaced by a first sprocket, the second pulley can be replaced by a second sprocket, and the transmission belt 53 can be replaced by a chain.

[0068] In other embodiments, the vertical loading mechanism is configured to include a baffle and a vertical loading cylinder, wherein the baffle is fixedly disposed on the machine base and is located above the first station, and is configured to form a stop fit with the workpiece to be tested located at the second station; the vertical loading cylinder is disposed on the machine base and is located below the first station, and the output direction of the vertical loading cylinder is disposed upward in a vertical direction, and is configured to form a stop fit with the workpiece to be tested located at the first station.

[0069] When in use, the vertical loading cylinder is started, and the output shaft of the vertical loading cylinder is extended. In the process of extending the output shaft of the vertical loading cylinder, the workpiece to be tested at the first station is first driven to move upward; when the workpiece to be tested at the first station moves to abut the bottom of the shear plate 2, as the output shaft of the vertical loading cylinder continues to extend, the workpiece to be tested at the first station synchronously drives the shear plate 2 and the workpiece to be tested at the second station to move upward until the workpiece to be tested at the second station abuts against the bottom of the baffle.

[0070] In other embodiments, in order to reduce the slipping of the test piece due to external force during the test, a friction portion is provided on the contact surface between the shear plate 2 and the test piece, and the friction portion is configured to increase the friction between the test piece and the shear plate 2.

[0071] Specifically in this embodiment, Figure 1 As shown, the friction portion can be configured to include a plurality of friction strips 21, the friction strips 21 are configured to be in an "I"-shaped structure and are horizontally arranged at the top of the main board portion, the extension direction of the friction strips 21 is perpendicular to the extension direction of the first guide rail 1, and the plurality of friction strips 21 are arranged at equal intervals along the extension direction of the first guide rail 1.

[0072] It is understandable that a friction portion may also be provided at the bottom of the main board portion to increase the friction between the workpiece to be tested and the shear plate 2 at the first station.

[0073] In other embodiments, the friction portion may also be configured as a plurality of friction protrusions, and the friction protrusions are configured as spherical structures and are disposed on the top of the main board portion.

[0074] In combination with the above embodiments, the use principle and working process of the embodiments of the present invention are as follows:

[0075] Initially, the shear plate 2 is in the first position, and the clamping block 421 is clamped with the clamping hole 422 located on the upper side.

[0076] First, the two pieces to be tested are placed on the first station and the second station respectively, and then the driving motor 52 is started. The driving motor 52 drives the first pulley 54 to rotate forward through the second pulley and the transmission belt 53. The first pulley 54 drives the two wheels 512 thereon to rotate forward through the axle 511, so as to drive the moving trolley 51 to move backward along the first guide rail 1 and move from the first position to the second position; when the shear plate 2 moves to the second position, on the one hand, the second station and the first station are correspondingly arranged in the vertical direction, and the two pieces to be tested are correspondingly arranged in the vertical direction, and on the other hand, the output shafts of the push rod 31 and the transverse loading cylinder 33 are pushed on the front and rear side walls of the slider 34 respectively.

[0077] Then the vertical loading cylinder is started, and the output shaft of the vertical loading cylinder is extended. In the process of extending the output shaft of the vertical loading cylinder, it first drives the workpiece to be tested at the first station to move upward; when the workpiece to be tested at the first station moves to abut the bottom of the shear plate 2, as the output shaft of the vertical loading cylinder continues to extend, the workpiece to be tested at the first station synchronously drives the shear plate 2 and the workpiece to be tested at the second station to move upward, until the workpiece to be tested at the second station abuts against the bottom of the baffle to achieve clamping.

[0078] Then the transverse loading cylinder 33 is started, and the output shaft of the transverse loading cylinder 33 is extended. During the extension of the output shaft of the transverse loading cylinder 33, the shear plate 2 moves forward under the obstruction of the slider 34, and simultaneously drives the ends of the two pieces to be tested close to the shear plate 2 to move forward, so that the pieces to be tested produce a compression shear effect. When the pieces to be tested are deformed, the shear force is measured in real time by the force sensor.

[0079] After the compression and shear test is completed, the drive motor 52 is started, and the drive motor 52 drives the first pulley 54 to reverse through the second pulley and the transmission belt 53. The first pulley 54 drives the two wheels 512 thereon to reverse through the axle 511, so as to drive the moving cart 51 to move forward along the first guide rail 1 and move from the second position to the first position.

[0080] When switching from the shear measurement state to the angle measurement state, first remove the locking plate 56 from the moving trolley 51, then start the drive motor 52, the drive motor 52 drives the first pulley 54 to reverse through the second pulley and the transmission belt 53, the first pulley 54 drives the two wheels 512 thereon to reverse through the axle 511, so as to drive the moving trolley 51 to move forward along the first guide rail 1, so that the base 551 and the moving trolley 51 are spaced apart.

[0081] Then, the rotating shaft 41 is pushed to move to the left side to move from the third position to the fourth position, and the compression spring 43 is compressed; when the rotating shaft 41 is in the fourth position, the block 421 and the block 421 located on the upper side are disengaged, so that the locking assembly 42 is in an unlocked state, and then the rotating shaft 41 is driven to rotate 90 degrees counterclockwise to move from the fifth position to the sixth position; when the rotating shaft 41 is in the sixth position, the block 421 and the card hole 422 located on the left side are correspondingly arranged, and the locking assembly 42 is in an unlocked state; then the rotating shaft 41 is released, and the rotating shaft 41 moves to the right side under the action of the compression spring 43 to move from the fourth position to the third position; when the rotating shaft 41 is in the third position, the block 421 and the block 421 located on the left side are engaged, so that the locking assembly 42 is in a locked state, and the output shaft of the transverse loading cylinder 33 is arranged downward in the vertical direction, and the transverse loading cylinder 33 is in an angle measuring state.

[0082] Then the two pieces to be tested are placed at the first station and the second station respectively; then the vertical loading cylinder is started, and the output shaft of the vertical loading cylinder is extended. In the process of extending the output shaft of the vertical loading cylinder, the piece to be tested at the first station is first driven to move upward; when the piece to be tested at the first station moves to abut the bottom of the shear plate 2, as the output shaft of the vertical loading cylinder continues to extend, the piece to be tested at the first station synchronously drives the shear plate 2 and the piece to be tested at the second station to move upward until the piece to be tested at the second station abuts against the bottom of the baffle to achieve clamping.

[0083] Then the transverse loading cylinder 33 is started, and the output shaft of the transverse loading cylinder 33 extends. During the extension of the output shaft of the transverse loading cylinder 33, the shear plate 2 is synchronously driven to rotate in the counterclockwise direction, and the shear plate 2 synchronously drives the edges of the two test pieces to produce two opposite deformations of compression and rebound. When the test piece is deformed, the shear force is measured in real time by the force sensor.

[0084] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A horizontal force bidirectional support system for a compression shear testing machine, characterized in that: The horizontal force bidirectional support system of the compression-shear testing machine includes a machine base, a shear plate, a transverse loading mechanism, a vertical loading mechanism and a force sensor. A first station and a first guide rail are arranged on the machine base, and a second station is arranged on the top of the shear plate. The second station and the first station are arranged at intervals in the vertical direction, and are both used to place the test piece; the first guide rail is extended in the horizontal direction; the shear plate is horizontally and slidably arranged on the first guide rail, and has corresponding first and second positions before and after sliding. When in the first position, the second station and the first station are staggered, and when in the second position, the second station and the first station are correspondingly arranged; the transverse loading mechanism is arranged on the shear plate, and is configured to apply a transverse loading force to the shear plate; the vertical loading mechanism is configured to apply a vertical loading force to the shear plate; the force sensor is arranged on the force transmission path of the transverse loading mechanism and the shear plate, and is used to measure the shear force.

2. The horizontal force bidirectional support system of the compression shear testing machine according to claim 1 is characterized in that: The transverse loading mechanism includes a push rod, a second guide rail, a transverse loading cylinder and a slider, the push rod is fixedly arranged on the first guide rail; the second guide rail is fixedly arranged on the shear plate and is arranged parallel to the first guide rail; the transverse loading cylinder has a shear measurement state, and when in the shear measurement state, the output direction of the transverse loading cylinder is arranged parallel to the extension direction of the second guide rail, and the output end of the transverse loading cylinder and the push rod are arranged opposite to each other; the slider is slidably arranged on the second guide rail and is located between the output end of the transverse loading cylinder and the push rod, and the slider is configured to form a stop fit with the push rod and the output end of the transverse loading cylinder.

3. The horizontal force bidirectional support system of the compression shear testing machine according to claim 2 is characterized in that: The transverse loading cylinder also has an angle measurement state. When in the angle measurement state, the output direction of the transverse loading cylinder is set in the vertical direction, and the output end of the transverse loading cylinder is configured to form a stopper cooperation with the machine base; the horizontal force bidirectional support system of the compression and shear testing machine also includes a switching mechanism, and the switching mechanism is configured to switch the working state of the transverse loading cylinder between the shear measurement state and the angle measurement state according to measurement requirements.

4. The horizontal force bidirectional support system of the compression shear testing machine according to claim 3 is characterized in that: The switching mechanism includes a rotating shaft and a locking assembly, wherein the rotating shaft is horizontally arranged on the shear plate, and the axis of the rotating shaft and the extension direction of the second guide rail are arranged perpendicularly, and the rotating shaft can elastically slide along its own axis direction and has corresponding third and fourth positions before and after sliding, and can also rotate on its own and has corresponding fifth and sixth positions before and after rotation; the locking assembly has a locked state and an unlocked state; when the transverse loading cylinder is in the shear measurement state, the locking assembly is in the locked state, and the rotating shaft is locked in the third position and the fifth position at the same time; when the transverse loading cylinder is in the rotation angle measurement state, the locking assembly is in the locked state, and the rotating shaft is locked in the third position and the sixth position at the same time; when the rotating shaft is in the fourth position, the locking assembly is in the unlocked state.

5. The horizontal force bidirectional support system of the compression shear testing machine according to claim 4 is characterized in that: The locking assembly includes a clamping block and two clamping holes. The clamping block is fixedly arranged on the rotating shaft. The two clamping holes are arranged on the shear plate and are arranged at intervals along the circumferential direction. The clamping holes are configured to form a keyway with the clamping block.

6. The horizontal force bidirectional support system of the compression shear testing machine according to claim 4 is characterized in that: The switching mechanism further comprises an elastic member, wherein the elastic member is connected between the rotating shaft and the shear plate, and under the action of the elastic member, the rotating shaft has a tendency to slide along its own axial direction.

7. The horizontal force bidirectional support system of the compression shear testing machine according to claim 1 is characterized in that: The horizontal force bidirectional support system of the compression-shear testing machine further includes a driving mechanism, and the driving mechanism is configured to drive the shear plate to switch between the first position and the second position.

8. The horizontal force bidirectional support system of the compression shear testing machine according to claim 7 is characterized in that: The driving mechanism includes a moving trolley and a pin floating assembly. The moving trolley is slidably arranged on the first guide rail, and the moving trolley is connected to the shear plate through the pin floating assembly.

9. The horizontal force bidirectional support system of the compression shear testing machine according to claim 1, characterized in that: The vertical loading mechanism includes a baffle and a vertical loading cylinder. The baffle is fixedly arranged on the machine base and located above the first station, and is configured to form a stopper with the workpiece to be tested located at the second station; the vertical loading cylinder is arranged on the machine base and located below the first station, and the output direction of the vertical loading cylinder is arranged upward in the vertical direction, and is configured to form a stopper with the workpiece to be tested located at the first station.

10. The horizontal force bidirectional support system of the compression shear testing machine according to claim 1, characterized in that: A friction portion is provided on the surface of the shear plate that contacts the workpiece to be tested, and the friction portion is configured to increase the friction force between the workpiece to be tested and the shear plate.

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