Rebound hammer positioning device for concrete strength detection
By designing a rebound hammer positioning device with components such as guide sleeves, support wheels, and magnet blocks, the problem of inaccurate angle positioning in concrete testing of rebound hammers was solved, achieving efficient and stable concrete strength testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU TESTING CENT FOR QUALITY OF CONSTR ENG
- Filing Date
- 2025-06-27
- Publication Date
- 2026-05-29
AI Technical Summary
Existing rebound hammers lack stable guiding and support structures in concrete strength testing, resulting in inaccurate angle positioning and affecting the accuracy and efficiency of test results.
A positioning device for a concrete strength tester rebound hammer was designed, comprising components such as a guide sleeve, support wheel, dual-axis digital display inclinometer, support rod, and handle, to achieve precise angle positioning and stable guidance. The combination of magnet and iron ring increases the ease of fixing, while the buffer cavity and convex ring improve the grip comfort.
It improves the angular positioning accuracy and testing efficiency of rebound hammers in concrete testing, reduces testing errors, and enhances the reliability of test results.
Smart Images
Figure CN224303425U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of positioning devices, specifically relating to a positioning device for a rebound hammer used for concrete strength testing. Background Technology
[0002] In the field of construction engineering, concrete strength is one of the key indicators for evaluating project quality. The rebound hammer method, with its advantages of ease of operation and low cost, has become a commonly used method for on-site testing of concrete strength. As the core testing tool of the rebound hammer method, the accuracy of the rebound hammer directly affects the accuracy of concrete strength assessment.
[0003] In actual testing, the angle positioning of the rebound hammer has a significant impact on the test results. In existing technologies, operators typically rely on experience and visual judgment to determine the angle of the rebound hammer. This method is not only inefficient but also makes it difficult to guarantee the accuracy of the angle, easily leading to significant errors in the test results. Furthermore, the lack of a stable guiding and supporting structure when testing concrete surfaces makes the rebound hammer prone to shaking during the testing process, further reducing the accuracy and reliability of the test.
[0004] Therefore, there is an urgent need for a rebound hammer positioning device that can achieve precise angle positioning and stable guidance to improve the accuracy and efficiency of concrete strength testing. Utility Model Content
[0005] This utility model addresses the shortcomings of existing technologies by providing a positioning device for a rebound hammer used in concrete strength testing. The specific technical solution is as follows:
[0006] A positioning device for a concrete strength tester rebound hammer includes a guide sleeve fitted onto the main body of the rebound hammer. A ring-shaped array of support wheels is mounted on the inner surface of the guide sleeve, with two layers of support wheels. A dual-axis digital inclinometer for measuring angles is fixed to the end of the guide sleeve. Four support rods are arranged in a ring-shaped array on the outer surface of the guide sleeve. An outer sleeve is movably fitted onto the outside of each support rod. A hand-tightening screw is screwed into a screw hole at the end of the outer sleeve, with the end of the hand-tightening screw contacting the outer surface of the support rod. Connecting rings are welded to the four support rods. A handle is welded to the surface of the guide sleeve and is fixedly welded to one of the support rods. A rubber sleeve is fitted over the handle.
[0007] Preferably, a magnet is fixed in a groove on the outer surface of the handle, and an iron ring is fixed in a groove on the inner surface of the rubber sleeve, with the magnet and the iron ring corresponding one-to-one.
[0008] Preferably, the rubber sleeve has a buffer cavity inside, and the buffer cavities are evenly distributed.
[0009] Preferably, the outer surface of the rubber sleeve is integrally formed with a raised ring, and the buffer cavity and the raised ring are staggered.
[0010] Preferably, the angle between the axis of the guide sleeve and the axis of the support rod is 30 degrees.
[0011] Compared with the prior art, the beneficial effects of this utility model are:
[0012] 1. A ring array of support wheels is installed on the inner surface of the guide sleeve. The support wheels have two layers, which facilitates the guidance of the guide sleeve after it is fitted onto the rebound hammer body, increasing the stability of the guide sleeve's movement on the rebound hammer. A dual-axis digital display inclinometer fixed to the end of the guide sleeve allows for the measurement of the guide sleeve's angle, thus facilitating the adjustment of the rebound hammer's angle along with the guide sleeve. Four support rods are distributed in a ring array on the outer surface of the guide sleeve, and an outer sleeve is fixed to the support rods by hand-tightening screws. Adjusting the position of the outer sleeve allows for the adjustment of the guide sleeve's angle, facilitating positioning of the rebound hammer at different angles when measuring the concrete strength. The rebound hammer can then use the positioning device to determine the angle before testing the concrete strength. The handle welded to the surface of the guide sleeve is covered with a rubber sleeve, allowing the user to grip the guide sleeve for support while holding it with their other hand to measure the concrete.
[0013] 2. The rubber sleeve is fixed to the outside of the handle by the cooperation of the iron ring and the magnetic block, which increases the convenience of fixing the rubber sleeve to the outside of the handle. The buffer cavity set inside the rubber sleeve facilitates the deformation of the rubber sleeve when subjected to force, and the one-piece convex ring on the outer surface of the rubber sleeve increases the roughness of the outer surface of the rubber sleeve, making it easier for the user to grip the outside of the rubber sleeve. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0015] Figure 2 This is a partial cross-sectional structural diagram of the present invention;
[0016] Figure 3 This is a schematic diagram of the guide sleeve and support wheel structure in this utility model;
[0017] Figure 4 for Figure 2 Enlarged structural diagram at point A;
[0018] Figure 5 for Figure 2 A magnified structural diagram at point B in the middle.
[0019] Reference numerals: 1. Guide sleeve; 2. Support wheel; 3. Support rod; 4. Outer sleeve; 5. Hand screw; 6. Connecting ring; 7. Handle; 8. Rubber sleeve; 9. Iron ring; 10. Magnet block; 11. Buffer chamber; 12. Convex ring; 13. Dual-axis digital display inclinometer. Detailed Implementation
[0020] The technical solution of this utility model will now be described with reference to the accompanying drawings and embodiments.
[0021] Please see Figure 1-5 This embodiment provides the following technical solution: a positioning device for a rebound hammer for concrete strength testing, including a guide sleeve 1 fitted onto the main body of the rebound hammer, a ring array of support wheels 2 installed on the inner surface of the guide sleeve 1, and the support wheels 2 having two layers, a dual-axis digital display inclinometer 13 for measuring angles fixed at the end of the guide sleeve 1, four support rods 3 distributed in a ring array on the outer surface of the guide sleeve 1, an outer sleeve 4 movably fitted onto the outside of the support rods 3, a screw hole with a hand screw 5 screwed into the end of the outer sleeve 4, and the end of the hand screw 5 contacting the outer surface of the support rod 3, connecting rings 6 welded onto the four support rods 3, a handle 7 welded onto the surface of the guide sleeve 1, and the handle 7 being welded and fixed to one of the support rods 3, and a rubber sleeve 8 being fitted onto the outer sleeve of the handle 7.
[0022] In this embodiment, a ring array of support wheels 2 is installed on the inner surface of the guide sleeve 1. The support wheels 2 have two layers, which facilitates the guidance of the guide sleeve 1 after it is fitted onto the rebound hammer body, thereby increasing the stability of the guide sleeve 1 as it moves on the rebound hammer. The dual-axis digital display inclinometer 13 fixed at the end of the guide sleeve 1 facilitates the measurement of the angle of the guide sleeve 1 by the dual-axis digital display inclinometer 13, thereby facilitating the adjustment of the angle of the rebound hammer following the guide sleeve 1. The four support rods 3 distributed in a ring array on the outer surface of the guide sleeve 1, and the outer sleeve 4 fixed to the support rods 3 by hand-tightening screws 5, facilitate the adjustment of the position of the outer sleeve 4 to achieve the purpose of adjusting the angle of the guide sleeve 1. This allows the rebound hammer to be positioned at different angles when measuring the strength of concrete, and facilitates the rebound hammer to perform strength testing of concrete after positioning the angle by the positioning device. The handle 7 welded to the surface of the guide sleeve 1 is covered with a rubber sleeve 8, which allows the user to hold the guide sleeve 1 with the rubber sleeve 8 for support, and allows the user to hold the rebound hammer with the other hand to measure the concrete.
[0023] Specifically, a magnet 10 is fixed in a groove on the outer surface of the handle 7, and an iron ring 9 is fixed in a groove on the inner surface of the rubber sleeve 8. The magnet 10 and the iron ring 9 correspond one-to-one. A buffer cavity 11 is provided inside the rubber sleeve 8. The buffer cavities 11 are evenly distributed. A convex ring 12 is integrally formed on the outer surface of the rubber sleeve 8. The buffer cavity 11 and the convex ring 12 are staggered.
[0024] In this embodiment, the rubber sleeve 8 is fixed to the outside of the handle 7 by the cooperation of the iron ring 9 and the magnet block 10, thereby increasing the convenience of fixing the rubber sleeve 8 to the outside of the handle 7. The buffer cavity 11 provided inside the rubber sleeve 8 facilitates the deformation of the rubber sleeve 8 when subjected to force. The convex ring 12 integrally formed on the outer surface of the rubber sleeve 8 increases the roughness of the outer surface of the rubber sleeve 8, making it easier for the user to grip the outside of the rubber sleeve 8.
[0025] Specifically, the angle between the axis of the guide sleeve 1 and the axis of the support rod 3 is 30 degrees.
[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A positioning device for a rebound hammer used for testing concrete strength, comprising a guide sleeve (1) fitted onto the main body of the rebound hammer, characterized in that: The inner surface of the guide sleeve (1) is equipped with a ring array of support wheels (2), and the support wheels (2) are arranged in two layers. The end of the guide sleeve (1) is fixed with a dual-axis digital display inclinometer (13) for measuring angles. The outer surface of the guide sleeve (1) is distributed with four support rods (3) in a ring array. The support rods (3) are movably sleeved with an outer sleeve (4). The end of the outer sleeve (4) has a screw hole with a hand screw (5) screwed in it. The end of the hand screw (5) contacts the outer surface of the support rod (3). Connecting rings (6) are welded on the four support rods (3). The surface of the guide sleeve (1) is welded with a handle (7), and the handle (7) is welded and fixed to one of the support rods (3). The handle (7) is sleeved with a rubber sleeve (8).
2. The positioning device for a rebound hammer for testing concrete strength according to claim 1, characterized in that: A magnet (10) is fixed in a groove on the outer surface of the handle (7), and an iron ring (9) is fixed in a groove on the inner surface of the rubber sleeve (8), with the magnet (10) and the iron ring (9) corresponding one-to-one.
3. The positioning device for a rebound hammer for testing concrete strength according to claim 2, characterized in that: The rubber sleeve (8) has a buffer cavity (11) inside, and the buffer cavities (11) are evenly distributed.
4. The positioning device for a rebound hammer for testing concrete strength according to claim 3, characterized in that: The outer surface of the rubber sleeve (8) is integrally formed with a convex ring (12), and the buffer cavity (11) and the convex ring (12) are misaligned.
5. The positioning device for a rebound hammer for testing concrete strength according to claim 1, characterized in that: The angle between the axis of the guide sleeve (1) and the axis of the support rod (3) is 30 degrees.