Building material anti-shearing test device

Abstract

The utility model belongs to the field of building material detection, and discloses a building material anti-shearing test device which comprises a workbench, supporting legs and a fixing plate are arranged on the bottom face of the workbench, and a detection mechanism is installed on the workbench. The driving unit comprises a two-way screw rod, a driving block, a rotating disc, a connecting block and a mounting block, one end of the two-way screw rod is connected with the rotating disc, the driving block is arranged on the two-way screw rod in a threaded and sleeving mode and slidably abuts against the bottom face of the workbench, a sliding groove is formed in the workbench, the connecting block is slidably arranged in the sliding groove, and the two ends of the connecting block are connected with the mounting block and the driving block correspondingly; the mounting block is in sliding butt joint with the top surface of the workbench; and the clamping mechanism is mounted on the mounting block. By forming the sliding groove, chippings generated during detection can fall onto the ground through the sliding groove, the influence of the chippings on the driving unit is avoided, the connecting block only slides in the sliding groove and is not matched with the sliding groove, the chippings are attached to the sliding groove and cannot interfere with sliding of the connecting block, and the stability of the driving unit is improved.

Description

Technical Field

[0001] This utility model belongs to the field of building material testing technology, specifically relating to a building material shear resistance testing device. Background Technology

[0002] The shear strength of building materials refers to the material's ability to resist failure when subjected to shear force. Shear strength reflects the ultimate strength of a material under shear force, and its magnitude determines the structural strength of a building project to a certain extent.

[0003] In related prior art, such as Chinese Patent No. CN221649512U, a steel component shear deformation detection device is disclosed, including a worktable. A limiting mechanism is installed on the top of the worktable, and a shearing mechanism is arranged between the limiting mechanisms. The shearing mechanism includes a horizontal plate, and pressing mechanisms are arranged on both sides of the horizontal plate. The advantages are: the pressing mechanism includes pressure rollers; as the mounting frame moves downward with the horizontal plate, the two pressure rollers gradually move away from each other, pressing the ends of the steel component. The pressure rollers rise and fall with the horizontal plate, avoiding repeated installation and adjustment; the rotating shaft drives a gear to rotate, which in turn drives a rack frame to move the pressure plate downward, further pressing the steel component; the pressure plate is connected to the bottom of the rack frame via a telescopic rod and a spring, facilitating automatic adjustment according to the thickness of the steel component and preventing excessive pressing force that could cause damage.

[0004] However, in actual use, when building materials are sheared and broken, debris and fragments may be generated. Since the worktable has a cavity and the limiting mechanism is installed inside the cavity, these debris and fragments may fall into the cavity, interfering with or hindering the position adjustment of the limiting mechanism. Furthermore, the debris and fragments are difficult to remove from the cavity. In summary, this device is difficult to maintain and clean, and its components are easily interfered with by debris. Utility Model Content

[0005] The present invention aims to provide a shear resistance testing device for building materials to solve the problem of difficult maintenance and cleaning of existing shear devices mentioned above.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a shear resistance testing device for building materials, comprising...

[0007] The workbench has supporting legs on the bottom surface, and fixed plates are installed on both sides of the bottom surface of the workbench. An installation plate is installed on the workbench, and a testing mechanism is installed on the installation plate.

[0008] The drive unit includes a bidirectional screw, a drive block, a turntable, a connecting block, and a mounting block. The bidirectional screw is rotatably mounted on the inner side of two fixed plates. One end of the bidirectional screw passes through the fixed plate and is connected to the turntable. The drive block is threaded onto the bidirectional screw and slides against the bottom surface of the worktable. A groove is provided on the worktable. The connecting block is slidably disposed in the groove, and both ends of the connecting block are connected to the mounting block and the drive block, respectively. The mounting block slides against the top surface of the worktable.

[0009] The clamping mechanism is mounted on the mounting block.

[0010] The principle and effects of this technical solution:

[0011] 1. By providing a chute on the workbench, debris generated during the inspection of building materials can fall to the ground through the chute, thus avoiding the impact of debris on the drive unit. At the same time, the design of the drive block and mounting block abutting against the sides of the workbench, and the design of the connecting block sliding only within the chute, ensures that even if debris adheres to the chute, it will not interfere with the sliding of the connecting block (the connecting block only slides within the chute and does not engage), thereby improving the stability of the drive unit during use.

[0012] 2. By abutting the mounting block against the worktable, the weight of the building materials and the pressure during testing can be absorbed, preventing the double-headed screw from deforming or bending due to pressure. By abutting the bottom surface of the worktable and slidingly fitting it onto the double-headed screw, the driving block can be driven and guided by the double-headed screw, while being limited by the worktable. This ensures that the mounting block can only drive the clamping mechanism to move horizontally, improving the stability of the drive unit.

[0013] 3. By controlling the rotation of the bidirectional screw through the turntable, the drive blocks on both sides can move closer or further apart, thereby allowing the clamping mechanism to be adjusted according to the length of the building material to accommodate more building material sizes.

[0014] The present invention is further configured such that: the clamping mechanism includes a mounting frame, a drive rod, a drive motor, and a clamping plate; the mounting frame is fixed on the mounting block, and the cross-section of the mounting frame is inverted U-shaped; the drive rod is rotatably mounted on the inner side of the mounting frame, and the drive rod has two external threads with opposite directions; the drive rod is located at the upper end of the inner side of the mounting frame; the clamping plate is threadedly fitted onto the drive rod, and the clamping plate slides against the mounting block; the drive motor is fixed on the outer wall of the mounting frame, and one end of the drive rod is connected to the movable end of the drive motor.

[0015] The principle and effect of this technical solution: By driving the drive rod to rotate through the drive motor, the drive rod can cause the two clamping plates to move closer and further apart, thereby clamping the building materials. Furthermore, by setting the drive rod on the upper inner side of the mounting frame, debris and slag will not interfere with the cooperation between the clamping plates and the drive rod, thus improving the stability of the clamping mechanism during use.

[0016] The present invention is further configured to include a positioning unit and a pressure plate. The mounting bracket has relief grooves on both sides and relief notches corresponding to the relief grooves on the clamping plate. The pressure plate is slidably engaged with the relief grooves and relief notches respectively. The positioning unit includes a positioning component, which is used to limit the position of the pressure plate.

[0017] The principle and effect of this technical solution: The pressure plate slides within the clearance groove and clearance notch, so the setting of the pressure plate will not interfere with the horizontal movement of the clamp. Furthermore, through the setting of the pressure plate and positioning components, the pressure plate can press and restrict the ends of the building material, preventing the building material from bending or warping during the testing process.

[0018] The present invention is further configured such that: the positioning component includes a connecting plate, a control plate, a control head, and a control bolt; the connecting plate is fixed to the side wall of the pressure plate; the top of the mounting bracket has a slot; the inner wall of the slot has an insertion hole; the connecting plate slides with the slot; the control plate is fixed to the top of the connecting plate and is located above the mounting bracket; the control head is fixed to the control plate; the side wall of the connecting plate has a control groove; the control bolt slides with the control groove; the end of the control bolt is threaded into the insertion hole; and the head of the control bolt abuts against the connecting plate.

[0019] The principle and effect of this technical solution: By setting up a connecting plate, a control plate, and a control head, the user can control the position of the connecting plate relative to the mounting block through the control head. By rotating the control bolt, the matching length of the control bolt relative to the insertion hole can be controlled, thereby making the control bolt press against or move away from the pressure plate. This achieves the effect of positioning or releasing the limit on the position of the pressure plate. The pressure of the control bolt against the connecting plate limits the position of the connecting plate, thereby restricting the position of the pressure plate and preventing the building materials from bending during testing, which would affect the test results.

[0020] The present invention is further configured such that: the positioning unit also includes a spring-loaded component, which is installed in the relief groove and is used to elastically press the pressure plate.

[0021] The principle and effect of this technical solution: By setting the spring-loaded component, the pressure plate can be firmly pressed against the surface of the building material when the positioning component is not in position, thereby avoiding the gap between the pressure plate and the building material when the positioning component is used alone, which would cause the building material to bend during shearing and affect the final test results. The spring-loaded component can also assist the positioning component in applying pressure and limiting the building material, thereby improving the stability of the positioning unit.

[0022] The present invention is further configured such that: the spring-loaded assembly includes a guide rod and a spring, the guide rod is installed in the relief groove, and the pressure plate and the guide rod are slidably fitted together, and the spring is sleeved on the guide rod and located above the pressure plate.

[0023] The principle and effect of this technical solution: The guide rod can guide and limit the sliding of the pressure plate, and the spring can make the pressure plate firmly press against the surface of the building material when the positioning component is not positioned. This avoids the gap between the pressure plate and the building material when the positioning component is used alone, which would cause the building material to bend during shearing and affect the final test results, thus improving accuracy. The spring has a good elongation coefficient, which can reduce the influence of the spring pressure component on the stroke of the pressure plate.

[0024] The present invention is further configured such that: the cross-section of the mounting plate is in the shape of a "7"; the detection mechanism includes a hydraulic cylinder, an upper shearing block, and a lower shearing block; the hydraulic cylinder is mounted on the mounting plate; the movable end of the hydraulic cylinder passes through the mounting plate and is connected to the upper shearing block; the lower shearing block is fixed on the worktable and its position corresponds to that of the upper shearing block.

[0025] The principle and effect of this technical solution: The upper shearing block is driven downward by the hydraulic cylinder, so that the upper shearing block is close to the building material placed on the clamping mechanism. The upper shearing block presses against the building material, so that the building material is tightly attached to the lower shearing block. Thus, the building material receives the shearing force of the upper and lower shearing blocks. The pressure sensor inside the hydraulic cylinder detects the resistance encountered by the upper shearing block when it is pressed down, thereby detecting the shear resistance of the building material. Attached Figure Description

[0026] Figure 1 This is the front view of the present invention;

[0027] Figure 2 for Figure 1 A bottom view of the central workbench;

[0028] Figure 3 for Figure 1 Enlarged structural view of the mounting bracket in the middle;

[0029] Figure 4 for Figure 3 Structural diagram of the connecting plate in the middle;

[0030] Figure 5 for Figure 3 Partial structural diagram of the mounting bracket. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0032] The reference numerals in the accompanying drawings include:

[0033] 101. Workbench; 102. Support leg; 103. Slide rail; 104. Fixing plate;

[0034] 201. Mounting plate; 202. Hydraulic cylinder; 203. Upper shearing block; 204. Lower shearing block;

[0035] 301. Bidirectional screw; 302. Drive block; 303. Turntable; 304. Connecting block; 305. Mounting block;

[0036] 401, Mounting bracket; 4011, Clearance groove; 4012, Slot; 4013, Socket; 402, Drive rod; 403, Drive motor; 404, Clamping plate; 4041, Clearance notch;

[0037] 501. Pressure plate;

[0038] 601. Connecting plate; 6011. Control slot; 602. Control plate; 603. Control head; 604. Control bolt;

[0039] 701. Guide rod; 702. Spring.

[0040] Example:

[0041] As attached Figure 1-5 As shown, this utility model discloses a shear resistance testing device for building materials, including a workbench 101, a drive unit, a clamping mechanism, a positioning unit, and a pressure plate 501. The workbench 101 has support legs 102 around its bottom surface. Fixing plates 104 are installed on the left and right sides of the bottom surface of the workbench 101. A mounting plate 201 with a "7"-shaped cross-section is installed on the workbench 101. A testing mechanism is installed on the mounting plate 201, comprising a hydraulic cylinder 202, an upper shear block 203, and a lower shear block 204. The hydraulic cylinder 202 is mounted on the mounting plate 201, with its movable end passing through the mounting plate 201 and connected to the upper shear block 203. The lower shear block 204 is fixed to the workbench 101 and its position corresponds to that of the upper shear block 203. The hydraulic cylinder 202 has a pressure sensor, which is a commonly used pressure testing structure and will only be briefly described here.

[0042] The drive unit includes a bidirectional screw 301, a drive block 302, a turntable 303, a connecting block 304, and a mounting block 305. The bidirectional screw 301 is rotatably mounted on the inner side of two fixed plates 104. One end of the bidirectional screw 301 passes through the fixed plate 104 and is connected to the turntable 303. The drive block 302 is threaded onto the bidirectional screw 301 and slides against the bottom surface of the worktable 101. A groove 103 is provided on the worktable 101, and the connecting block 304 is slidably disposed within the groove 103. The two ends of the device are connected to the mounting block 305 and the driving block 302 respectively. The mounting block 305 slides against the top surface of the worktable 101. The worktable 101 has four evenly distributed sliding grooves 103. One driving block 302 corresponds to two connecting blocks 304, and the two connecting blocks 304 are located at both ends of the driving block 302. The bidirectional screw 301 is located in the middle of the driving block 302. The driving block 302, connecting block 304, mounting block 305 and clamping mechanism are set in two sets and are symmetrically arranged about the worktable 101.

[0043] The clamping mechanism includes a mounting frame 401, a drive rod 402, a drive motor 403, and a clamping plate 404. The mounting frame 401 is fixed on the mounting block 305, and the cross-section of the mounting frame 401 is inverted U-shaped. The drive rod 402 is rotatably mounted on the inner side of the mounting frame 401, and the drive rod 402 has two external threads with opposite directions. The drive rod 402 is located at the upper end of the inner side of the mounting frame 401. The clamping plate 404 is threaded onto the drive rod 402, and the clamping plate 404 slides against the mounting block 305. The drive motor 403 is fixed on the outer wall of the mounting frame 401, and one end of the drive rod 402 is connected to the movable end of the drive motor 403. The mounting frame 401 has clearance grooves 4011 on both sides, and the clamping plate 404 has clearance notches 4041 corresponding to the clearance grooves 4011. The pressure plate 501 slides with the clearance grooves 4011 and the clearance notches 4041 respectively.

[0044] The positioning unit includes a positioning component and a spring-loaded component. The positioning component includes a connecting plate 601, a control plate 602, a control head 603, and a control bolt 604. The connecting plate 601 is fixed to the side wall of the pressure plate 501. The top of the mounting bracket 401 has a slot 4012, and the inner wall of the slot 4012 has an insertion hole 4013. The connecting plate 601 and the slot 4012 are slidably engaged. The control plate 602 is fixed to the top of the connecting plate 601 and is located above the mounting bracket 401. The control head 603 is fixed to the control plate 602. The side wall of the connecting plate 601 has a control groove 6011. The control bolt 604 is engaged with the sliding rod of the control groove 6011, and the end of the control bolt 604 is threaded into the insertion hole 4013. The head of the control bolt 604 abuts against the connecting plate 601. One of the connecting plates 601 can be symmetrically arranged with two connecting plates 601, and the control bolt 604 can be installed on only one of the connecting plates 601, or the control bolt 604 can be set on both connecting plates 601, which can be adjusted according to the actual required limiting force.

[0045] The spring-loaded assembly includes a guide rod 701 and a spring 702. The guide rod 701 is installed in the relief groove 4011, and the pressure plate 501 is slidably fitted with the guide rod 701. The spring 702 is sleeved on the guide rod 701 and is located above the pressure plate 501. The spring-loaded assembly is installed in the relief grooves 4011 on both sides of the mounting bracket 401.

[0046] The clamping mechanism and positioning unit can clamp and limit the ends of the building material, thereby preventing the building material from bending under pressure at the unloaded parts.

[0047] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A shear resistance test apparatus for building materials, characterised in that: Comprising The workbench bottom has support legs, two sides of the workbench bottom are respectively provided with fixed plates, an installation plate is installed on the workbench, and a detection mechanism is installed on the installation plate; The driving unit comprises a bidirectional screw rod, a driving block, a rotating disc, a connecting block and an installation block, the bidirectional screw rod is rotatably installed on the inner side of the two fixed plates, one end of the bidirectional screw rod penetrates through the fixed plate and is connected with the rotating disc, the driving block is threadedly sleeved on the bidirectional screw rod, and the driving block is in sliding abutment with the bottom surface of the workbench, a sliding groove is formed in the workbench, the connecting block is slidably arranged in the sliding groove, and the two ends of the connecting block are respectively connected with the installation block and the driving block, and the installation block is in sliding abutment with the top surface of the workbench. The clamping mechanism is installed on the installation block.

2. A shear resistance test apparatus for building materials as claimed in claim 1 wherein: The clamping mechanism comprises a mounting frame, a driving rod, a driving motor and a clamping plate, the mounting frame is fixed on the installation block, the cross section of the mounting frame is inverted U-shaped, the driving rod is rotatably installed on the inner side of the mounting frame, two external threads with opposite rotation directions are formed on the driving rod, the upper end of the driving rod is located in the inner side of the mounting frame, the clamping plate is threadedly sleeved on the driving rod, and the clamping plate is in sliding abutment with the installation block, and the driving motor is fixed on the outer wall of the mounting frame, and one end of the driving rod is connected with the movable end of the driving motor.

3. A shear resistance test apparatus for building materials as claimed in claim 2 wherein: The positioning unit and the pressing plate are further arranged, the two sides of the mounting frame are respectively provided with a gap slot, the clamping plate is provided with a gap notch corresponding to the gap slot, the pressing plate is in sliding cooperation with the gap slot and the gap notch, and the positioning unit comprises a positioning assembly.

4. A shear resistance test apparatus for building materials as claimed in claim 3 wherein: The positioning assembly comprises a connecting plate, a control plate, a control head and a control bolt, the connecting plate is fixed on the side wall of the pressing plate, the top of the mounting frame is provided with a insertion slot, an insertion hole is formed in the inner wall of the insertion slot, the connecting plate is in sliding cooperation with the insertion slot, the control plate is fixed on the top of the connecting plate and located above the mounting frame, the control head is fixed on the control plate, a control slot is formed in the side wall of the connecting plate, the control bolt is in sliding cooperation with the control slot, one end of the control bolt is threadedly inserted into the insertion hole, and the head of the control bolt is in abutment with the connecting plate.

5. A shear resistance test apparatus for building materials as claimed in claim 3 wherein: The positioning unit further comprises an elastic pressing assembly, the elastic pressing assembly is installed in the gap slot and used for elastically pressing the pressing plate.

6. A shear resistance test apparatus for building materials as claimed in claim 5 wherein: The elastic pressing assembly comprises a guide rod and a spring, the guide rod is installed in the gap slot, the pressing plate is in sliding sleeve connection with the guide rod, and the spring is sleeved on the guide rod and located above the pressing plate.

7. A shear resistance test apparatus for building materials as claimed in claim 1, wherein: The cross section of the installation plate is in the shape of "7", the detection mechanism comprises a hydraulic cylinder, an upper shearing block and a lower shearing block, the hydraulic cylinder is installed on the installation plate, the movable end of the hydraulic cylinder penetrates through the installation plate and is connected with the upper shearing block, and the lower shearing block is fixed on the workbench and located in correspondence with the upper shearing block.

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