Portable rebound apparatus for concrete strength detection
By incorporating features such as arc grooves, anti-slip rubber plates, and guide rails into the rebound hammer, the problems of uncomfortable grip and unstable impact have been solved, improving testing efficiency and accuracy while protecting the instrument.
Patent Information
- Application Number
- CN202520854436.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2026-05-05
- Estimated Expiration
- 2035-04-30
AI Technical Summary
Existing rebound hammers are not comfortable to hold, and prolonged use can easily lead to hand fatigue. Furthermore, the unstable impact energy affects the detection accuracy.
A portable rebound device was designed, which uses arc grooves, anti-slip rubber plates and elastic bandages to improve grip comfort, guide rails and guide blocks to ensure consistent impact, and is protected by a fixed sleeve, round hole, protective cylinder, round rod, elastic rod and limit block.
It improves operator comfort and testing accuracy, reduces hand fatigue, ensures the accuracy and reliability of test results, and protects the instrument from damage.
Smart Images
Figure CN224202948U_ABST
Abstract
Description
Technical Field
[0001] This utility model mainly relates to the field of building engineering testing equipment technology, specifically to a portable rebound hammer for testing concrete strength. Background Technology
[0002] In modern construction engineering, concrete, as one of the most widely used building materials, has a strength that directly affects the safety and durability of building structures. Accurately testing concrete strength is a crucial step in ensuring project quality and building safety, and it is essential throughout multiple important stages, including engineering design, construction process control, and safety assessment of existing buildings.
[0003] Currently, there are many methods for testing concrete strength, but the rebound method has become one of the most commonly used testing methods in engineering sites due to its significant advantages such as simple operation, high testing efficiency, relatively low cost and minimal damage to concrete structures. As a result, portable rebound hammers have become a common tool for building testing personnel.
[0004] During the operation of specific embodiments, the inventors discovered the following defects:
[0005] Existing rebound hammers are cylindrical, which are uncomfortable to hold and can easily cause hand fatigue for operators after prolonged use, affecting the accuracy of the test. In addition, rebound hammers also have defects in the stability of the impact mechanism, with unstable impact energy affecting the test results.
[0006] It should be noted that the above content falls within the scope of the inventor's technical knowledge. Due to the vast and complex nature of the technical content in this field, the above content of this application does not necessarily constitute prior art. Utility Model Content
[0007] 1. The technical problem to be solved by the utility model:
[0008] This utility model provides a portable rebound hammer for testing concrete strength, in order to solve the technical problems existing in the background art.
[0009] 2. Technical Solution:
[0010] To achieve the above objectives, the technical solution provided by this utility model is as follows: a portable rebound hammer for testing concrete strength, comprising a shell, a tension spring, a rebound hammer, a rebound rod, and a display screen. One end of the tension spring is fixedly connected to one end inside the shell, and the rebound hammer is fixedly connected to the other end of the tension spring. The rebound rod is disposed in a guide sleeve inside the shell, and the display screen is embedded in the upper surface of the shell. Grip mechanisms are installed on both sides of the tail end of the shell, and guide components are provided on both sides of the rebound hammer.
[0011] Furthermore, the gripping mechanism includes arc-shaped plates installed on both sides of the outer wall of the housing, an arc-shaped groove is provided inside the arc-shaped plate, an anti-slip rubber plate is provided inside the arc-shaped groove, and an elastic buffer pad is provided on the inner wall of the arc-shaped groove.
[0012] Furthermore, an elastic bandage is provided on the outside of the arc-shaped groove, and the two ends of the elastic bandage are fixed to the side wall of the arc-shaped plate.
[0013] Furthermore, the guiding assembly includes guide rails symmetrically arranged on both sides of the impact hammer. One end of the guide rail is fixedly connected to the inner tail end of the outer shell. A guide block is slidably connected to the outside of the guide rail. One end of the guide block is fixedly connected to the outer side wall of the impact hammer. A limiting assembly is also provided above the impact hammer.
[0014] Furthermore, the limiting component includes a protrusion fixedly connected to the top of the hammer, a spring fixedly connected to the top of the protrusion, and a limiting hole for the spring to pass through is provided on the top of the housing.
[0015] Furthermore, a fixing sleeve is fixedly installed at the front end of the outer wall of the outer shell, and the fixing sleeve has evenly spaced circular holes. A protective cylinder is detachably installed on the outside of the outer shell, and a circular rod is evenly connected to the end of the protective cylinder. The circular rod is connected through the circular hole. An elastic rod is provided on the top wall of the outer shell, and a limit block is connected to the end of the elastic rod. The limit block is limited and connected to one of the circular rods.
[0016] 3. Beneficial effects:
[0017] Compared with the prior art, the technical solution provided by this utility model has the following advantages:
[0018] This utility model is reasonably designed. By setting up arc grooves, anti-slip rubber plates and elastic bandages, it can increase friction and improve grip comfort. Furthermore, by setting up elastic buffer pads, it can effectively reduce the impact of vibration generated by the rebounder on the operator's hands, greatly improving the operator's grip comfort, reducing hand fatigue, and thus improving detection efficiency and accuracy.
[0019] By setting up guide rails and guide blocks, the consistency of each impact is ensured, thereby improving the accuracy and reliability of the test results;
[0020] By incorporating a fixed sleeve, round hole, protective cylinder, round rod, elastic rod, and limit block, the front end of the rebound hammer can be protected when it is not in use, preventing water from entering the rebound hammer and damaging the instrument, thus affecting its normal operation.
[0021] It should be noted that the structures not described in this utility model are the same as or can be implemented using existing technology, and will not be elaborated here, as they do not involve the design points and improvement directions of this utility model. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0023] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the outer shell of this utility model;
[0024] Figure 3 This is a schematic diagram of the guide component structure of this utility model;
[0025] Figure 4 This is a schematic diagram of the gripping mechanism of this utility model.
[0026] Figure label:
[0027] 1. Outer shell; 2. Tension spring; 3. Strike hammer; 4. Strike rod; 5. Display screen; 6. Curved plate; 601. Curved groove; 7. Anti-slip rubber plate; 8. Elastic buffer pad; 9. Elastic bandage; 10. Guide rail; 11. Guide block; 12. Protrusion; 13. Spring; 14. Fixing sleeve; 1401. Round hole; 15. Protective cylinder; 1501. Round rod; 16. Elastic rod; 17. Limiting block. Detailed Implementation
[0028] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.
[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," "provided with," and "located in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example
[0032] See attached document Figure 1-4 A portable rebound hammer for testing concrete strength includes a housing 1, a tension spring 2, an impact hammer 3, an impact rod 4, and a display screen 5. One end of the tension spring 2 is fixedly connected to one end inside the housing 1, and the other end of the impact hammer 3 is fixedly connected to the tension spring 2. A displacement sensor is also arranged parallel to the impact hammer 3 on the inner wall of the housing 1, which can capture the displacement changes of the impact hammer 3 in real time. The impact rod 4 is located in a guide sleeve inside the housing 1, and the guide sleeve is fixedly connected inside the housing 1. The impact rod 4 extends laterally through the inside of the guide sleeve, and a spring is wound around the outside of the impact rod 4 to reset the impact rod 4 after impact. A pressure sensor is installed at the front end of the impact rod 4, which can directly measure the pressure generated at the moment of impact when the impact rod 4 hits the concrete surface. The display screen 5 is embedded in the upper surface of the housing 1 to display the rebound data. Grip mechanisms are installed on both sides of the rear end of the housing 1, and guide components are provided on both sides of the impact hammer 3.
[0033] In this embodiment, the gripping mechanism includes arc-shaped plates 6 installed on both sides of the outer wall of the outer shell 1. Arc-shaped grooves 601 are provided inside the arc-shaped plates 601. Anti-slip rubber plates 7 are provided inside the arc-shaped grooves 601. Elastic buffer pads 8 are provided on the inner wall of the arc-shaped grooves 601.
[0034] It should be noted that placing fingers on the anti-slip rubber plate 7 inside the arc groove 601 can increase friction, and the contact between the sides of the fingers and the elastic buffer pad 8 can improve the comfort of holding.
[0035] In this embodiment, an elastic bandage 9 is provided on the outside of the arc-shaped groove 601, and the two ends of the elastic bandage 9 are fixed to the side wall of the arc-shaped plate 6.
[0036] It should be noted that the elastic bandage 9 can come into contact with the back of the hand, increasing friction while improving comfort and stability.
[0037] In this embodiment, the guide assembly includes guide rails 10 symmetrically arranged on both sides of the impact hammer 3. One end of the guide rail 10 is fixedly connected to the inner tail end of the outer shell 1. A guide block 11 is slidably connected to the outside of the guide rail 10. One end of the guide block 11 is fixedly connected to the outer side wall of the impact hammer 3. A limiting assembly is also provided above the impact hammer 3.
[0038] It should be noted that ensuring the striking hammer 3 moves in a straight line during the striking process improves the accuracy and stability of the strike.
[0039] In this embodiment, the limiting component includes a protrusion 12 fixedly connected to the top of the hammer 3, a spring 13 fixedly connected to the top of the protrusion 12, and a limiting hole for the spring 13 to pass through is provided on the top of the outer shell 1.
[0040] It should be noted that the limiting of the striking hammer 3 is released by pressing the spring 13 to compress the protrusion 12.
[0041] In this embodiment, a fixing sleeve 14 is fixedly installed on the front end of the outer wall of the outer shell 1. The fixing sleeve 14 has evenly spaced circular holes 1401. A protective cylinder 15 is detachably installed on the outside of the outer shell 1. A circular rod 1501 is evenly connected to the end of the protective cylinder 15. The circular rod 1501 is connected through the circular hole 1401. An elastic rod 16 is provided on the top wall of the outer shell 1. A limiting block 17 is connected to the end of the elastic rod 16. The limiting block 17 is limited and connected to one of the circular rods 1501.
[0042] It should be noted that by fitting the protective cylinder 15 onto the front end of the outer shell 1 and passing multiple round rods 1501 through the corresponding round holes 1401, and limiting one of the round rods 1501 by the elastic rod 16 and the limiting block 17, the front end of the rebounder can be protected.
[0043] The working principle of this utility model is as follows: When using the rebound hammer, firstly, the protective cylinder 15 is removed from the outer shell 1. The operator holds the outer shell 1 of the rebound hammer, with their fingers naturally placed on the anti-slip rubber plate 7 inside the arc groove 601, so that the impact rod 4 is vertically aligned with the concrete test surface. The spring 13 is pressed to compress the protrusion 12, and the impact hammer 3 is ejected under the action of the tension spring 2, striking the impact rod 4, so that the impact rod 4 transmits the force to the concrete surface. At the same time, the displacement sensor and the pressure sensor collect the rebound displacement and impact pressure data of the impact hammer 3, and transmit the data to the data processing chip for processing. The data processing chip sends the processed data to the display screen 5, and the operator can directly read the rebound value. After the test is completed, the protective cylinder 15 is put on the front end of the outer shell 1, and multiple round rods 1501 are passed through the corresponding round holes 1401. The elastic rod 16 and the limiting block 17 limit one of the round rods 1501, which can protect the front end of the rebound hammer.
[0044] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A portable rebound hammer for testing concrete strength, comprising a shell (1), a tension spring (2), a hammer (3), a rod (4), and a display screen (5), characterized in that: One end of the tension spring (2) is fixedly connected to one end inside the outer shell (1), the hammer (3) is fixedly connected to the other end of the tension spring (2), the striking rod (4) is located in the guide sleeve inside the outer shell (1), and the display screen (5) is embedded in the upper surface of the outer shell (1); both sides of the tail end of the outer shell (1) are equipped with a gripping mechanism, and both sides of the hammer (3) are equipped with guide components.
2. The portable rebound hammer for testing concrete strength according to claim 1, characterized in that: The gripping mechanism includes arc-shaped plates (6) installed on both sides of the outer wall of the outer shell (1). The arc-shaped plates (6) have arc-shaped grooves (601) inside. The arc-shaped grooves (601) have anti-slip rubber plates (7) inside. The inner wall of the arc-shaped grooves (601) has elastic buffer pads (8).
3. A portable rebound hammer for testing concrete strength according to claim 2, characterized in that: The arc groove (601) is provided with an elastic bandage (9) on its outside, and the two ends of the elastic bandage (9) are fixed to the side wall of the arc plate (6).
4. A portable rebound hammer for testing concrete strength according to claim 1, characterized in that: The guide assembly includes guide rails (10) symmetrically arranged on both sides of the impact hammer (3). One end of the guide rail (10) is fixedly connected to the inner tail end of the outer shell (1). A guide block (11) is slidably connected to the outside of the guide rail (10). One end of the guide block (11) is fixedly connected to the outer wall of the impact hammer (3). A limiting assembly is also provided above the impact hammer (3).
5. A portable rebound hammer for testing concrete strength according to claim 4, characterized in that: The limiting component includes a protrusion (12) fixedly connected to the top of the hammer (3), and a spring (13) fixedly connected to the top of the protrusion (12). The top of the outer shell (1) has a limiting hole through which the spring (13) passes.
6. A portable rebound hammer for testing concrete strength according to claim 1, characterized in that: A fixing sleeve (14) is fixedly installed on the front end of the outer wall of the outer shell (1). The fixing sleeve (14) has evenly spaced round holes (1401). A protective cylinder (15) is detachably installed on the outside of the outer shell (1). A round rod (1501) is evenly connected to the end of the protective cylinder (15). The round rod (1501) is connected through the round hole (1401). An elastic rod (16) is provided on the top wall of the outer shell (1). A limit block (17) is connected to the end of the elastic rod (16). The limit block (17) is limited and connected to one of the round rods (1501).