Digital display resiliometer for detecting strong concrete
By designing an auxiliary positioning component on the digital rebound hammer, the problem of maintaining the perpendicularity between the digital rebound hammer and the concrete surface was solved, resulting in more accurate measurement results and convenient maintenance operations.
Patent Information
- Application Number
- CN202520052792.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-01-10
AI Technical Summary
Existing digital rebound hammers have difficulty maintaining a perpendicular position to the concrete surface when testing strong concrete, resulting in large errors in the measurement results.
An auxiliary positioning assembly was designed, comprising a concave seat, a limiting slide, a limiting guide rod, bolts, a connecting block, a buffer rubber ring, and a return spring, to ensure that the digital display rebound hammer remains perpendicular to the concrete surface. Stable positioning and guidance are achieved through the cooperation of these components.
This improves the measurement accuracy of the digital rebound hammer, ensures the accuracy of the test data, and facilitates component disassembly, cleaning, and maintenance.
Smart Images
Figure CN223769983U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of digital rebound hammer technology, specifically a digital rebound hammer for testing strong concrete. Background Technology
[0002] The rebound hammer is mainly used for non-destructive testing of the compressive strength of ordinary concrete in structural engineering. The basic principle of the rebound hammer is to use a spring to drive a hammer. The hammer strikes a spring rod that is in perpendicular contact with the concrete surface with constant kinetic energy, causing local concrete deformation and absorbing some energy. The other part of the energy is converted into the rebound kinetic energy of the hammer. When all the rebound kinetic energy is converted into potential energy, the hammer rebounds to its maximum distance. The instrument displays the maximum rebound distance of the hammer as the rebound value (the ratio of the maximum rebound distance to the initial length of the spring).
[0003] Digital rebound hammers typically employ non-contact optical coupling sampling technology. This involves adding a slide rail or similar structural element to the digital display unit, allowing the optical coupling sensor on the display to detect the movement distance of the slider on the rebound hammer, thereby calculating the current strength of the object being tested. Its usage is as follows:
[0004] 1. Press the impact rod against the concrete surface, lightly press the instrument to release the button, and when the pressure is released, the impact rod extends and the hook is attached to the impact hammer;
[0005] 2. Keep the instrument axis perpendicular to the concrete surface and apply pressure slowly and evenly. After the hammer releases its hook and impacts the hammer rod, the hammer rebounds and moves the pointer backward to a certain position. When the value line on the pointer block shows a certain value on the scale, it is the rebound value.
[0006] 3. Keep the instrument mechanism pressed against the concrete surface to take a reading and record the rebound value;
[0007] 4. Gradually reduce the pressure on the instrument to allow the striking rod to extend out of the instrument, ready for the next use;
[0008] During the above operation, when the impact rod is pressed against the concrete surface, the rebound hammer must always be perpendicular to the concrete surface; otherwise, the test will obtain incorrect results. When operating the rebound hammer manually, it is generally confirmed by visual inspection and touch whether the rebound hammer is perpendicular to the concrete surface. This method of confirming the perpendicularity of the rebound hammer to the concrete surface has a large error, which will ultimately affect the measurement results of the rebound hammer. Based on this, a digital display rebound hammer for testing strong concrete is provided. Utility Model Content
[0009] The purpose of this invention is to provide a digital rebound hammer for testing strong concrete in order to solve the problems mentioned above.
[0010] To achieve the above objectives, this utility model provides the following technical solution: a digital display rebound hammer for testing strong concrete, comprising a rebound hammer body, a digital display instrument, and an impact rod. The digital display instrument is fixedly installed on the upper surface of the rebound hammer body, and the impact rod is installed at the front end of the rebound hammer body. An auxiliary positioning component is provided below the rebound hammer body, and the auxiliary positioning component is used to help the digital display rebound hammer maintain a perpendicular state to the surface of the concrete.
[0011] The auxiliary positioning component includes a concave seat, a limiting slide groove, a limiting guide rod, bolts, a connecting block, a buffer rubber ring, and a return spring;
[0012] The bottom front and rear ends of the rebound spring body are respectively fixed with limit slides and rear support seats;
[0013] The limiting slide groove is formed at the bottom of the inner side of the concave seat, the bottom of the rebounder body slides on the inner side of the concave seat, and the limiting slide is slidably connected to the inner side of the limiting slide groove. The rear support seat is distributed on the outer rear end of the concave seat.
[0014] The limiting guide rod extends from inside the limiting slide groove to the outside of the rear end of the concave seat, and both ends of the limiting guide rod are respectively attached to the limiting slide and the rear end support seat, and are fixedly connected to the limiting slide and the rear end support seat by bolts;
[0015] The buffer rubber ring and connecting block are fixed to the outside of the limiting guide rod and distributed on the inside of the limiting slide groove. The buffer rubber ring is attached to the rear end of the inner wall of the limiting slide groove. The connecting block is located at one end of the limiting guide rod near the limiting slide seat. The return spring is distributed on the inside of the limiting slide groove and its two ends are fixedly connected to the connecting block and the rear end of the inner wall of the limiting slide groove, respectively.
[0016] The concave seat is attached to the concrete surface to make the digital rebound hammer vertically distributed on the concrete surface. The combination of the impact rod, the limiting slide, the limiting guide rod, and the limiting slide seat is used to guide the horizontal movement of the digital rebound hammer.
[0017] As a further improvement of this utility model: an anti-slip rubber block is bonded and fixed to the front end of the concave seat, and the end face of the anti-slip rubber block is flush with the front end face of the spring rod.
[0018] As a further embodiment of this utility model: a buffer block is bonded and fixed to the rear end of the concave seat, and the outer wall size of the buffer block is smaller than the outer wall size of the concave seat.
[0019] As a further embodiment of this utility model: the bottom center of the concave seat is formed with a hand-held groove, the outer wall size of the rear support seat matches the outer wall size of the concave seat, and the lower surfaces of the concave seat and the rear support seat are horizontal.
[0020] As a further improvement of this utility model: two reset springs are symmetrically arranged inside the limiting slide groove with the limiting guide rod as the center line, and the maximum elongation of the reset spring is greater than the distance between the initial position of the limiting slide block and the front end of the limiting slide groove.
[0021] Compared with the prior art, the beneficial effects of this utility model are:
[0022] By setting up an auxiliary positioning component, the concave seat is always in contact with the concrete surface. Compared with the traditional operation of directly hand-held digital rebound hammer, the vertical position of the digital rebound hammer to the concrete surface is more stable, and the measured data is more accurate. The digital rebound hammer and the auxiliary positioning component can be separated by removing bolts, which facilitates the cleaning of dust and impurities inside the auxiliary positioning component later. Overall, it is convenient to use and maintain. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the structure of this utility model;
[0024] Figure 2 This is a schematic diagram of the structure of this utility model from another perspective;
[0025] Figure 3 This is a schematic diagram showing the disassembled digital display rebound spring and auxiliary positioning components of this utility model;
[0026] Figure 4 This is a split diagram of the auxiliary positioning component of this utility model.
[0027] In the diagram: 1. Digital rebound hammer; 101. Rebound hammer body; 102. Digital display instrument; 103. Impact rod; 104. Limiting slide; 105. Rear support seat; 2. Auxiliary positioning component; 201. Concave seat; 202. Limiting slide groove; 203. Limiting guide rod; 204. Bolt; 205. Connecting block; 206. Buffer rubber ring; 207. Return spring; 208. Anti-slip rubber block; 209. Buffer rubber block; 210. Handheld groove. Detailed Implementation
[0028] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0029] Please see Figures 1-4In this embodiment of the present invention, a digital display rebound hammer for testing strong concrete includes a digital display rebound hammer 1 consisting of a rebound hammer body 101, a digital display instrument 102, and an impact rod 103. The digital display instrument 102 is fixedly installed on the upper surface of the rebound hammer body 101, and the impact rod 103 is installed at the front end of the rebound hammer body 101. An auxiliary positioning component 2 is provided below the rebound hammer body 101. The auxiliary positioning component 2 is used to help the digital display rebound hammer 1 maintain a perpendicular state to the surface of the concrete.
[0030] The auxiliary positioning component 2 includes a concave seat 201, a limiting slide 202, a limiting guide rod 203, a bolt 204, a connecting block 205, a buffer rubber ring 206, and a return spring 207;
[0031] The bottom front and rear ends of the rebounder body 101 are respectively fixed with limit slides 104 and rear support seats 105;
[0032] The limiting slide groove 202 is opened at the bottom of the inner side of the concave seat 201. The bottom of the rebounder body 101 slides on the inner side of the concave seat 201, and the limiting slide 104 is slidably connected to the inner side of the limiting slide groove 202. The rear support seat 105 is distributed on the outer rear end of the concave seat 201.
[0033] The limiting guide rod 203 extends from the inside of the limiting slide groove 202 to the outside of the rear end of the concave seat 201, and the two ends of the limiting guide rod 203 are respectively attached to the limiting slide 104 and the rear end support seat 105, and are fixedly connected to the limiting slide 104 and the rear end support seat 105 by bolts 204.
[0034] The buffer ring 206 and the connecting block 205 are fixed to the outside of the limiting guide rod 203 and distributed on the inside of the limiting slide groove 202. The buffer ring 206 is attached to the rear end of the inner wall of the limiting slide groove 202. The connecting block 205 is located at one end of the limiting guide rod 203 near the limiting slide seat 104. The return spring 207 is distributed on the inside of the limiting slide groove 202 and the two ends of the return spring 207 are fixedly connected to the connecting block 205 and the rear end of the inner wall of the limiting slide groove 202, respectively.
[0035] The concave seat 201 is attached to the concrete surface at the front end to achieve the vertical distribution of the digital display rebound hammer 1 to the concrete surface. The combination of the impact rod 103, the limiting slide groove 202, the limiting guide rod 203, and the limiting slide seat 104 is used to achieve the horizontal movement guidance of the digital display rebound hammer 1.
[0036] The front end of the concave seat 201 is bonded with an anti-slip rubber block 208, and the end face of the anti-slip rubber block 208 is flush with the front end face of the spring rod 103.
[0037] A buffer block 209 is bonded and fixed to the rear end of the concave seat 201. The outer wall dimension of the buffer block 209 is smaller than the outer wall dimension of the concave seat 201.
[0038] In this embodiment, the operating steps of this digital display rebound hammer are as follows:
[0039] By holding the concave seat 201 with one hand and making its front end fit against the concrete surface, the digital display rebound hammer 1 is perpendicular to the concrete surface, and the front end of the impact rod 103 is in contact with the concrete surface.
[0040] Then, the other hand pushes the main body 101 of the rebound hammer, causing the impact rod 103 to retract. Finally, the impact hammer inside the main body 101 of the rebound hammer disengages and impacts the impact rod 103 to complete the detection operation. During this process, since the concave seat 201 is always in contact with the concrete surface, the digital display rebound hammer 1 is in a stable vertical distribution state with the concrete surface during the entire operation. Compared with the traditional operation of directly holding the digital display rebound hammer for detection, the vertical state of the digital display rebound hammer 1 with the concrete surface is more stable, and the measured data is more accurate.
[0041] In addition, the digital display rebounder 1 and the auxiliary positioning component 2 can be separated by removing bolt 204, which makes it easier to clean the dust and impurities inside the auxiliary positioning component 2 later, and the overall use and maintenance are convenient.
[0042] It should also be noted that: the anti-slip rubber block 208 is used to increase the friction with the concrete surface, making the vertical fit between the concave seat 210 and the concrete surface more stable; the buffer rubber block 209 is used to buffer the rebound hammer body 101 by contacting the buffer rubber block 209 through the rear support seat 105; and the buffer rubber ring 206 is used to limit and buffer the reset of the digital display rebound hammer 1.
[0043] Please refer to this carefully. Figures 1-4 The concave seat 201 has a hand-held groove 210 formed in the middle of its bottom. The outer wall size of the rear support seat 105 matches the outer wall size of the concave seat 201. The lower surfaces of the concave seat 201 and the rear support seat 105 are horizontal.
[0044] In this embodiment: the structural design of the hand-held groove 210 facilitates stable gripping by the operator, and at the same time, prevents the operator's hand holding the concave base 201 from colliding with the concrete surface or the rear support base 105, thus ensuring safe use.
[0045] In addition, the concave base 201 and the lower surface of the rear support base 105 are horizontal, which allows the device to be placed stably on the table and the digital display instrument 102 to face upwards. Compared with the traditional structure of the digital display rebound meter 1 placed on the table and the digital display instrument 102 tilted and attached to the table, this structure can provide a certain degree of protection for the digital display instrument 102, and at the same time facilitates data query and setting operations for the digital display instrument 102.
[0046] Please refer to this carefully. Figures 2-4 Two return springs 207 are symmetrically arranged inside the limiting slide groove 202 with the limiting guide rod 203 as the center line. The maximum elongation of the return spring 207 is greater than the distance between the initial position of the limiting slide block 104 and the front end of the limiting slide groove 202.
[0047] In this embodiment: when the digital display rebound spring 1 is pushed to perform the detection operation, the reset spring 207 is stretched, and the deformation elastic force of the reset spring 207 can provide power for the movement and reset of the digital display rebound spring 1.
[0048] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A digital rebound hammer for testing strong concrete, comprising a digital rebound hammer (1) composed of a rebound hammer body (101), a digital instrument (102), and a rebounding rod (103), wherein the digital instrument (102) is fixedly installed on the upper surface of the rebound hammer body (101), and the rebounding rod (103) is installed on the front end of the rebound hammer body (101), characterized in that, The rebound hammer body (101) is provided with an auxiliary positioning assembly (2) below, which is used for assisting the digital rebound hammer (1) to keep vertical with the surface of the concrete; The auxiliary positioning assembly (2) comprises a concave seat (201), a limiting sliding groove (202), a limiting guide rod (203), a bolt (204), a connecting block (205), a buffer rubber ring (206) and a reset spring (207). The bottom end of the rebound hammer body (101) is respectively fixed with a limiting sliding seat (104) and a rear end supporting seat (105). The limiting sliding groove (202) is opened in the bottom of the inner side of the concave seat (201), the rebound hammer body (101) is slidably connected in the bottom of the inner side of the concave seat (201), and the limiting sliding seat (104) is slidably connected in the inner side of the limiting sliding groove (202). The limiting guide rod (203) penetrates from the inner side of the limiting sliding groove (202) to the outer side of the rear end of the concave seat (201), and the two ends of the limiting guide rod (203) are respectively attached to the limiting sliding seat (104) and the rear end supporting seat (105) and are fixedly connected with the limiting sliding seat (104) and the rear end supporting seat (105) through the bolt (204). The buffer rubber ring (206) and the connecting block (205) are fixed to the outer side of the limiting guide rod (203) and are distributed in the inner side of the limiting sliding groove (202), the buffer rubber ring (206) is attached to the rear end of the inner wall of the limiting sliding groove (202), the connecting block (205) is located at one end of the limiting guide rod (203) close to the limiting sliding seat (104), and the reset spring (207) is distributed in the inner side of the limiting sliding groove (202) and the two ends of the reset spring (207) are respectively fixedly connected with the connecting block (205) and the rear end of the inner wall of the limiting sliding groove (202). The front end of the concave seat (201) is attached to the surface of the concrete, which is used for realizing the vertical distribution of the digital rebound hammer (1) and the surface of the concrete, and the cooperation of the rebounding rod (103), the limiting sliding groove (202), the limiting guide rod (203) and the limiting sliding seat (104) is used for realizing the horizontal movement of the digital rebound hammer (1).
2. The digital readout rebound hammer for testing of high strength concrete according to claim 1, characterized in that, The front end of the concave seat (201) is fixedly attached with an anti-skid rubber block (208), and the end face of the anti-skid rubber block (208) is flush with the front end face of the rebounding rod (103).
3. The digital readout rebound hammer for testing of high strength concrete according to claim 1, characterized in that, The rear end of the concave seat (201) is fixedly attached with a buffer rubber block (209), and the outer wall size of the buffer rubber block (209) is smaller than the outer wall size of the concave seat (201).
4. The digital readout rebound hammer for testing of high strength concrete according to claim 1, characterized in that, The bottom middle part of the concave seat (201) is formed with a handheld recess part (210), the outer wall size of the rear end supporting seat (105) matches the outer wall size of the concave seat (201), and the lower surfaces of the concave seat (201) and the rear end supporting seat (105) are horizontally structured.
5. The digital readout rebound hammer for testing of high strength concrete according to claim 1, characterized in that, The reset spring (207) is located inside the limiting sliding groove (202) and is symmetrically provided with two reset springs (207) with the limiting sliding rod (203) as the middle line, and the maximum elongation length of the reset spring (207) is greater than the distance between the initial position of the limiting sliding seat (104) and the front end of the limiting sliding groove (202).