A vertical mechanism for assisting a concrete rebound hammer

Abstract

This utility model discloses a vertical mechanism for assisting a concrete rebound hammer, relating to the field of building engineering testing equipment. The technical solution includes a rebound hammer body and a testing rod. A guide frame is fitted onto the outer wall of the rebound hammer body, and the guide frame includes a sleeve slidably connected to the rebound hammer body. Three slots are evenly distributed circumferentially on the side wall of the sleeve, and a support leg is rotatably connected to each slot via a rotating shaft. Each support leg has a contact surface at its end near the rotating shaft. A positioning groove is formed on the side wall of the slot located on the side of the rotating shaft, and a spring pin is provided on each support leg to cooperate with the positioning groove. When the support leg is extended, the contact surface abuts against the upper end of the slot, and the spring pin is inserted into the positioning groove. The beneficial effect of this utility model is that by assisting the rebound hammer body to vertically strike the testing surface through the guide frame, the axis of the rebound hammer body is always kept perpendicular to the tested surface, reducing human error.

Description

Technical Field

[0001] This utility model relates to the field of building engineering testing equipment, and in particular to a vertical mechanism for assisting a concrete rebound hammer. Background Technology

[0002] The concrete rebound hammer is suitable for testing the strength of general building components, bridges, and various concrete components (slabs, beams, columns, cable trays). Throughout the operation of the rebound hammer, attention should be paid to the grip posture. One hand should hold the middle of the hammer for centering; the other hand should hold the tail of the hammer to apply pressure and also assist in centering. The key points for operating the rebound hammer are: ensure the axis of the rebound hammer is always perpendicular to the concrete test surface, apply force evenly and slowly, center the hammer and align it with the test surface, advance it slowly, and read the value quickly.

[0003] In practical use, when a concrete rebound hammer is used for strength testing manually, the operation is relatively fast, making it difficult to keep the axis of the rebound hammer perpendicular to the concrete test surface at all times, which leads to a large human error in the measurement results. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a vertical mechanism for assisting a concrete rebound hammer.

[0005] The technical solution includes a rebound hammer body and a detection rod. The outer wall of the rebound hammer body is fitted with a guide frame, and the guide frame includes a sleeve that is slidably connected to the rebound hammer body. The sleeve has three slots evenly distributed around its side wall. Each slot is rotatably connected to a support leg via a pivot. Each support leg has a contact surface at the end near the pivot. A positioning groove is formed on the side wall of the slot located on one side of the rotating shaft, and a spring pin that cooperates with the positioning groove is provided on each of the legs; When the outrigger is extended, the contact surface abuts against the upper end surface of the slot, and the spring pin is inserted into the positioning slot.

[0006] Preferably, a magnet is also fixedly installed on another vertical wall of the slot, and the magnet is perpendicular to the projection of the positioning slot on the horizontal plane.

[0007] Preferably, the legs are made of metal, and the magnet attracts the legs when the legs are folded.

[0008] Preferably, each of the legs is provided with a rubber pad at its movable end, the rubber pad being made of elastic rubber material.

[0009] Preferably, a channel is provided in the middle of the sleeve for the rebound spring body to slide.

[0010] The beneficial effects of the technical solution provided by this utility model embodiment are: by using the guide frame to assist the rebound hammer body to strike the detection surface perpendicularly, the axis of the rebound hammer body is always kept perpendicular to the measured surface, thus reducing human error. Attached Figure Description

[0011] Figure 1 This is a schematic diagram illustrating the usage state of an embodiment of the present utility model.

[0012] Figure 2 This is a schematic diagram of the unfolded guide frame according to an embodiment of the present utility model.

[0013] Figure 3 This is a top view of the guide frame according to an embodiment of the present utility model.

[0014] Figure 4 This is a schematic diagram of the guide frame in its stored state according to an embodiment of the present invention.

[0015] Figure 5 This is a schematic diagram of the sleeve structure according to an embodiment of the present utility model.

[0016] Figure 6 This is a schematic diagram of the support leg structure according to an embodiment of the present utility model.

[0017] The attached figures are labeled as follows: 1. Rebound hammer body; 2. Detection rod; 3. Guide frame; 4. Sleeve; 5. Groove; 6. Support leg; 7. Contact surface; 8. Positioning groove; 9. Spring pin; 10. Magnet; 11. Rubber pad; 12. Channel; 13. Concrete wall. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are only for explaining this utility model and are not intended to limit it.

[0019] It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not 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 on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 based on the specific circumstances.

[0022] Example 1 See Figures 1 to 6 This utility model provides a vertical mechanism for an auxiliary concrete rebound hammer, including a rebound hammer body 1 and a detection rod 2. A guide frame 3 is fitted on the outer wall of the rebound hammer body 1, and the guide frame 3 includes a sleeve 4 that is slidably connected to the rebound hammer body 1. Three slots 5 are evenly distributed around the side wall of the sleeve 4. Each slot 5 is connected to a support leg 5 by a rotating shaft. Each support leg 5 has a contact surface 7 at the end near the rotating shaft. A positioning groove 8 is opened on the side wall of the slot 5 located on one side of the shaft, and a spring pin 9 that cooperates with the positioning groove 8 is provided on each leg 5. When the outrigger 5 is extended, the contact surface 7 abuts against the upper end surface of the slot 5, and the spring pin 9 is inserted into the positioning slot 8.

[0023] The user holds the guide frame 3 and the rebound hammer body 1 to the detection position, and rotates the support legs 5 outward to the unfolded state. The contact surface 7 of the support leg 5 contacts the upper surface of the slot 5, and the spring pin 9 automatically engages the positioning slot 8 to lock the position of the support leg 5. The three support legs 5 form a triangular support structure to ensure that the rebound hammer body 1 is perpendicular to the concrete wall 13 being tested. The spring pin 9 and the positioning groove 8 work together to lock the support leg 5 with one key, simplifying the operation steps. The triangular support structure effectively prevents tilting during the rebound test and improves the detection accuracy. The user places the detection rod 2 of the rebound hammer body 1 against the concrete wall surface, presses the rebound hammer body 1 horizontally against the concrete wall 13 and holds it in place, then observes the value, records it, and continues to the next point. The number of measurement areas for a single component should not be less than 10. For components whose dimensions in one direction are not greater than 4.5m and whose dimensions in another direction are not greater than 0.3m, the number of measurement areas may be appropriately reduced, but should not be less than 5. Sixteen points should be tested in a test area. The three maximum and three minimum values ​​of each area should be removed, and the remaining 10 rebound values ​​should be averaged. Then, the estimated value of concrete strength can be obtained by referring to the table.

[0024] A magnet 10 is also fixedly installed on the other vertical wall of the slot 5. The magnet 10 is perpendicular to the projection of the positioning slot 8 on the horizontal plane.

[0025] The support leg 5 is made of metal. When the support leg 5 is folded, the magnet 10 attracts the support leg 5.

[0026] When folding the support leg 5, rotate the support leg 5 to the side close to the magnet 10. The magnet 10 attracts the support leg 5, making it fit tightly against the inner wall of the slot 5. The attraction force of the magnet 10 prevents the support leg 5 from accidentally unfolding when not in use, keeping the sleeve 4 structure compact.

[0027] Each outrigger 5 has a rubber pad 11 at its movable end, and the rubber pad 11 is made of elastic rubber material.

[0028] After the outrigger 5 is deployed, the rubber pad 11 directly contacts the concrete wall surface. The rubber pad 11 increases the friction to prevent the outrigger 5 from slipping, and at the same time buffers the impact force of the rebound hammer on the guide frame 3.

[0029] A channel 12 is provided in the middle of the sleeve 4 for the rebound spring body 1 to slide.

[0030] When using this utility model, the user holds the guide frame 3 and the rebounder body 1 to the detection position, and rotates the support legs 5 outward to the unfolded state. The contact surface 7 of the support leg 5 contacts the upper end surface of the slot 5, and the spring pin 9 automatically engages the positioning slot 8 to lock the position of the support leg 5. The three support legs 5 form a triangular support structure to ensure that the rebounder body 1 is perpendicular to the concrete wall 13 being tested. The spring pin 9 and the positioning groove 8 work together to lock the support leg 5 with one key, simplifying the operation steps. The triangular support structure effectively prevents tilting during the rebound test and improves the detection accuracy. The user places the detection rod 2 of the rebound hammer body 1 into the concrete wall surface and presses the rebound hammer body 1 horizontally against the concrete wall 13 to hold it in place. Then, the user reads the value, records it, and continues to the next point. One component needs to be hit 160 points, and 16 points constitute one zone 9. One component is divided into 10 zones. Each component has at least 3 points for measuring carbonization depth, and the carbonization depth is measured and recorded. After removing the three maximum and three minimum values, the remaining 10 rebound values ​​are averaged, and then the estimated concrete strength can be obtained by referring to a table.

[0031] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A vertical mechanism for assisting a concrete rebound hammer, comprising a rebound hammer body (1) and a detection rod (2), characterized in that, The outer wall of the rebounder body (1) is fitted with a guide frame (3), and the guide frame (3) includes a sleeve (4) that is slidably connected to the rebounder body (1). The sleeve (4) has three slots (5) evenly distributed around its side wall. Each slot (5) is connected to a support leg (5) by a rotating shaft. Each support leg (5) has a contact surface (7) near the end of the rotating shaft. A positioning groove (8) is provided on the side wall of the slot (5) located on one side of the rotating shaft, and a spring pin (9) that cooperates with the positioning groove (8) is provided on each of the legs (5). When the support leg (5) is unfolded, the contact surface (7) abuts against the upper end surface of the slot (5), and the spring pin (9) is inserted into the positioning slot (8).

2. The vertical mechanism of the auxiliary concrete rebound hammer according to claim 1, characterized in that, A magnet (10) is also fixedly installed on another vertical wall of the slot (5), and the magnet (10) is perpendicular to the projection of the positioning slot (8) on the horizontal plane.

3. The vertical mechanism of the auxiliary concrete rebound hammer according to claim 2, characterized in that, The support leg (5) is made of metal. When the support leg (5) is folded, the magnet (10) attracts the support leg (5).

4. The vertical mechanism of the auxiliary concrete rebound hammer according to claim 1, characterized in that, Each of the legs (5) is provided with a rubber pad (11) at its movable end, the rubber pad (11) being made of elastic rubber material.

5. The vertical mechanism of the auxiliary concrete rebound hammer according to claim 1, characterized in that, The sleeve (4) has a channel (12) in the middle for the rebounder body (1) to slide.

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