Press assembly convenient to adjust
By designing a motor controller and a splash guard, the problems of eccentric compression and fragmentation of concrete samples were solved, thereby improving the accuracy and safety of concrete pressure testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-03-03
AI Technical Summary
Concrete samples are prone to eccentric compression during pressure testing, resulting in large dispersion in test results, and flying fragments may injure operators.
It uses a motor controller, stepper motor, gears and racks to work together to automatically clamp the sample to the center, and is equipped with a transparent splash guard to prevent fragments from flying.
It improves the accuracy and safety of test results, reduces the risk of operator injury, protects equipment safety, and reduces equipment maintenance costs.
Smart Images
Figure CN223966366U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of concrete processing technology, specifically to a press assembly that is easy to adjust. Background Technology
[0002] Concrete, or simply "concrete", is a general term for engineering composite materials in which aggregates are bound together by cementing materials. The term concrete usually refers to cement concrete, also known as ordinary concrete, which is made by mixing cement as cementing material, sand and stone as aggregates, water, and possibly admixtures and additives in a certain proportion. It is widely used in civil engineering.
[0003] A press, including punch presses and hydraulic presses, is a sophisticated and versatile press with a wide range of applications and high production efficiency. Presses can be widely used in processes such as cutting, punching, blanking, bending, riveting, and forming. They process metal parts by applying strong pressure to metal blanks to cause plastic deformation and fracture. When a mechanical press is working, an electric motor drives a large pulley (usually also serving as a flywheel) through a V-belt. This pulley, via a gear pair and clutch, drives a crank-slider mechanism, causing the slider and punch to move downwards in a straight line. After the forging process is completed, the slider moves upwards, the clutch automatically disengages, and at the same time, the automatic actuator on the crankshaft is engaged, stopping the slider near the top dead center.
[0004] In the process of developing this utility model, the inventors discovered the following problems with the existing technology: 1. When measuring concrete samples, manual placement in the center is required for each measurement, making it difficult to ensure that the sample is placed in the same position each time. Concrete pressure testing is mainly to obtain its compressive strength index. When the sample is not centered, eccentric compression occurs. Under eccentric compression, the stress distribution on the cross-section of the concrete specimen is uneven. Since the degree of non-centering may vary each time, the deviation direction and magnitude of the test results are difficult to predict. In a set of comparative tests, if some samples are tested centered and others are not, the dispersion of the test data will increase significantly. This is very detrimental to establishing an accurate concrete strength grade evaluation system or quality control standard, because stable and reliable strength data cannot be obtained; 2. During concrete pressure testing, when the concrete sample reaches its ultimate strength, the sample will suddenly break, and concrete fragments will fly outwards at high speed. These fragments can easily hit the operator's body, causing varying degrees of injury, such as skin abrasions, cuts, or even hitting sensitive areas such as the eyes, causing serious vision damage. Utility Model Content
[0005] The purpose of this utility model is to provide an easily adjustable press assembly to solve the problem mentioned in the background art where samples suddenly break, and concrete fragments fly outwards at high speeds, easily hitting the operator and causing varying degrees of injury. To achieve the above objective, this utility model provides the following technical solution: an easily adjustable press assembly, including a press body, an internally threaded screw connected to the press body, a rotating handle welded above the screw, a pressure plate rotatably connected below the screw, a support plate inside the press body, a base plate below the press body, a groove glued to the top of the base plate, a splash guard fitted inside the groove, and a motor controller mounted on the top of the base plate via screws.
[0006] A support rod is inserted inside the support plate, a gear is inserted in the middle of the support plate, a rack meshes with one side of the gear, and the output shaft of a stepper motor is installed below the gear by screws. A slide is opened inside the support plate, and a movable plate is attached to the inside of the slide. A connecting block is welded to the top of the support plate.
[0007] More preferably, the gear is configured as a rotating structure by a stepper motor, and a rack is provided alternately at the front and rear of the gear.
[0008] More preferably, the movable plate forms a horizontal sliding structure through a rack and pinion.
[0009] More preferably, the threaded screw forms a rotating structure by rotating the handle, and the external structural dimensions of the threaded screw are consistent with the internal structural dimensions of the press body.
[0010] More preferably, the pressure plate is configured as a vertical sliding structure via a threaded screw.
[0011] More preferably, the external structural dimensions of the splash guard are consistent with the internal structural dimensions of the groove.
[0012] More preferably, the internal structural dimensions of the groove of the movable plate are consistent with the external structural dimensions of the connecting block.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0014] In this invention, the coordinated operation of components such as the motor controller, stepper motor, gears, and racks automatically moves the sample to the center of the paperboard for clamping, solving the problem that it is difficult to ensure that the sample is always placed in the same measurement position when manually placed. This effectively reduces eccentric compression caused by the sample not being centered, resulting in a more uniform stress distribution on the cross-section of the concrete specimen. The direction and magnitude of the deviation in the test results can be effectively controlled, reducing the dispersion of the test data. This helps to establish a more accurate concrete strength grade evaluation system and quality control standards, providing more stable and reliable compressive strength data for engineering design and quality testing. The automatic centering device replaces manual operation, which not only improves the accuracy of sample placement but also speeds up the testing process to a certain extent. It ensures that the sample is accurately placed in the same position every time, making the entire testing process more standardized and reducing the extra adjustment time caused by differences in manual placement.
[0015] In this invention, a groove is installed above the base plate for inserting a splash guard. The transparent splash guard can effectively block the fragments that fly out after the concrete sample breaks. During the concrete pressure test, the fragments generated when the sample breaks fly out in all directions at high speed. With the splash guard, these fragments can be prevented from hitting the operator's body, greatly reducing the risk of injury to the operator, such as skin abrasions, cuts, and injuries to sensitive areas like the eyes. At the same time, it can also prevent fragments from damaging surrounding equipment, protecting the safety of laboratory instruments and equipment such as the pressure machine body, strain gauges, piezoelectric crystals, and pressure sensors, and reducing equipment maintenance costs. The splash guard is made of transparent material, so it does not affect the observation of the testing process while providing protection. Attached Figure Description
[0016] Figure 1 This is a front view structural diagram of the present invention;
[0017] Figure 2 This is a side view of the structure of this utility model;
[0018] Figure 3 This is a schematic diagram of the structure below the support plate of this utility model;
[0019] Figure 4 This is a schematic diagram of the structure above the support plate of this utility model.
[0020] In the diagram: 1. Press body; 2. Support plate; 201. Support rod; 202. Rack; 203. Gear; 204. Stepper motor; 205. Moving plate; 206. Connecting block; 207. Slide rail; 3. Rotating handle; 4. Threaded screw; 5. Splash guard; 6. Pressure plate; 7. Slide groove; 8. Base plate; 9. Motor controller. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0022] Please see Figures 1 to 4 This utility model provides a technical solution: an easily adjustable press assembly, including a press body 1, a threaded screw 4 internally connected to the press body 1, a rotating handle 3 welded above the threaded screw 4, a pressure plate 6 rotatably connected below the threaded screw 4, a support plate 2 inside the press body 1, a base plate 8 below the press body 1, a slide groove 7 glued above the base plate 8, a splash guard 5 attached inside the slide groove 7, and a motor controller 9 mounted on the base plate 8 by screws.
[0023] A support rod 201 is inserted into the inside of the support plate 2. A gear 203 is inserted into the middle of the support plate 2. A rack 202 meshes with one side of the gear 203. The output shaft of the stepper motor 204 is installed below the gear 203 by screws. A slide 207 is opened inside the support plate 2. A movable plate 205 is attached to the inside of the slide 207. A connecting block 206 is welded to the top of the support plate 2.
[0024] In this embodiment, as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the gear 203 forms a rotating structure through the stepper motor 204, and a rack 202 is staggered in front of and behind the gear 203. The gear 203 rotates under the drive of the stepper motor 204. This rotating structure allows the gear 203 to drive the two racks 202 to move in opposite directions at the same time, thereby realizing the symmetrical movement of the moving plate 205 and ensuring that the sample can be accurately clamped in the middle of the support plate 2. This symmetrical structural design improves the accuracy and stability of sample centering.
[0025] In this embodiment, as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the moving plate 205 forms a horizontal sliding structure through the rack 202; the gear 203 rotates under the drive of the stepper motor 204. This rotating structure enables the gear 203 to drive the two racks 202 to move in opposite directions at the same time, thereby realizing the symmetrical movement of the moving plate 205 and ensuring that the sample can be accurately clamped in the middle of the support plate 2. This symmetrical structural design improves the accuracy and stability of sample centering.
[0026] In this embodiment, as Figure 1 and Figure 2 As shown, the threaded screw 4 forms a rotating structure through the rotating handle 3, and the external structural dimensions of the threaded screw 4 are consistent with the internal structural dimensions of the press body 1. When the rotating handle 3 is manually turned clockwise, the threaded screw 4 will rotate. The rotation of the threaded screw 4 allows the pressure plate 6 connected to it to move up and down. When the pressure plate 6 moves down, it can firmly fix the sample on the support plate 2, preventing the sample from moving or shaking during the pressure test and ensuring the accuracy of the pressure test.
[0027] In this embodiment, as Figure 1 and Figure 2 As shown, the pressure plate 6 forms a vertical sliding structure through the threaded screw 4; when the threaded screw 4 rotates, the pressure plate 6 will slide up and down along the vertical direction. Before pressure testing, the threaded screw 4 is rotated by turning the handle 3, which drives the pressure plate 6 to move downward, pressing the sample tightly onto the support plate 2, ensuring that the sample remains fixed in the vertical direction, and providing stable conditions for the press body 1 to perform accurate pressure testing.
[0028] In this embodiment, as Figure 1 and Figure 2 As shown, the external structural dimensions of the splash guard 5 are consistent with the internal structural dimensions of the slide groove 7. During the measurement process, the splash guard 5 is inserted into the slide groove 7. The splash guard 5 is made of transparent material, which can prevent sample fragments from splashing during the measurement, protecting the operator and the surrounding environment. On the other hand, the transparent splash guard 5 makes it easy for the operator to observe the state of the sample during the pressure test, and promptly identify and deal with any problems.
[0029] In this embodiment, as Figure 4 As shown, the internal structural dimensions of the groove of the moving plate 205 are consistent with the external structural dimensions of the connecting block 206; the consistency between the groove of the moving plate 205 and the dimensions of the connecting block 206 can ensure the smooth movement of the moving plate 205 and hold the test sample.
[0030] The usage and advantages of this utility model: This easily adjustable press assembly operates as follows:
[0031] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the sample to be tested is first placed above the support plate 2. The stepper motor 204 is adjusted by the motor controller 9 (model: DKC-Y110). The stepper motor 204 causes the gear 203 to rotate. The gear 203 meshes with two racks 202. The racks 202 drive the upper moving plate 205 to move towards the center of the sample on the slide 207 and connecting block 206, so that the sample is clamped in the middle. The rotating handle 3 is manually turned clockwise. The rotating handle 3 drives the threaded screw 4 and the pressure plate 6 to move down in sequence to fix the sample. This makes it convenient for the press body 1 to detect the pressure of the sample through the strain gauge, piezoelectric crystal and pressure sensor. A slide groove 7 is installed on the top of the base plate 8. By inserting the anti-splash plate 5, the sample fragments are prevented from splashing during the measurement. The anti-splash plate 5 is transparent for easy observation.
[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. An easily adjustable press assembly, comprising a press body (1), characterized in that: The press body (1) is internally threaded with a threaded screw (4), a rotating handle (3) is welded above the threaded screw (4), a pressure plate (6) is rotatably connected below the threaded screw (4), a support plate (2) is provided inside the press body (1), a base plate (8) is provided below the press body (1), a slide groove (7) is glued above the base plate (8), a splash guard (5) is attached inside the slide groove (7), and a motor controller (9) is installed above the base plate (8) by screws. A support rod (201) is inserted inside the support plate (2). A gear (203) is inserted in the middle of the support plate (2). A rack (202) meshes with one side of the gear (203). The output shaft of a stepper motor (204) is installed below the gear (203) by screws. A slide (207) is opened inside the support plate (2). A movable plate (205) is attached inside the slide (207). A connecting block (206) is welded to the top of the support plate (2).
2. The easily adjustable press assembly according to claim 1, characterized in that: The gear (203) forms a rotating structure through a stepper motor (204), and a rack (202) is provided alternately at the front and rear of the gear (203).
3. The easily adjustable press assembly according to claim 1, characterized in that: The movable plate (205) forms a horizontal sliding structure through the rack (202).
4. The easily adjustable press assembly according to claim 1, characterized in that: The threaded screw (4) forms a rotating structure by rotating the handle (3), and the external structural dimensions of the threaded screw (4) are consistent with the internal structural dimensions of the press body (1).
5. The easily adjustable press assembly according to claim 1, characterized in that: The pressure plate (6) forms a vertical sliding structure through the threaded screw (4).
6. The easily adjustable press assembly according to claim 1, characterized in that: The external structural dimensions of the splash guard (5) are consistent with the internal structural dimensions of the groove (7).
7. The easily adjustable press assembly according to claim 1, characterized in that: The internal structural dimensions of the groove of the movable plate (205) are consistent with the external structural dimensions of the connecting block (206).