Concrete strength detection hammer

Abstract

The utility model discloses a concrete strength detection hammer and relates to the technical field of concrete. A concrete strength detection hammer comprises a driving structure and a multi-head impact hammer structure, the driving structure comprises a driving box and an access cover, a through groove is formed in the bottom end of the driving box, and three bearing sliding plates are slidably connected into the through groove. According to the concrete strength detection hammer, the driving structure and the multi-head impact hammer structure are arranged, the three hammer heads in the multi-head impact hammer structure can be driven by the driving structure to be adjusted at intervals, and the distance between the hammer heads can be dynamically adjusted according to different detection requirements. According to the concrete sample strength detection device, the hammer head can flexibly and synchronously detect the strength of the edge part and the central area of a concrete sample, so that a worker can more conveniently evaluate the overall strength of the concrete sample, the error condition of strength detection is reduced, and the quality and efficiency of detection work are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of concrete technology, specifically a concrete strength testing hammer. Background Technology

[0002] To ensure the quality of roads for daily travel and residential housing, relevant personnel must conduct quality testing and evaluation of concrete before the construction process begins; the concrete grade can be determined by testing the concrete strength, that is, the pressure limit that the concrete can withstand per unit cross-sectional area.

[0003] Concrete strength testing requires the use of a concrete strength testing device, and the concrete strength testing hammer plays a crucial role as an impact reference in the concrete strength testing device.

[0004] A search revealed that in a concrete strength testing device for engineering testing with patent publication number CN221707147U, it was proposed that "the output shaft of the motor provided by this utility model can drive the first bevel gear to rotate. The first bevel gear is set to be smaller than the second bevel gear. When the second bevel gear is driven to rotate, it is set to reduce speed and save effort. The rotation of the second bevel gear drives the threaded ring to rotate along the inner wall of the top of the bracket through the slider, so that the screw moves down along the inner wall of the threaded ring, which can move the extrusion hammer down to the inside of the placement box to perform extrusion testing on the concrete."

[0005] However, the above scheme still has some shortcomings in actual use. The extrusion hammer in this scheme can only test one point on the concrete sample. However, due to uneven pouring and vibration of concrete during production, the density of the concrete will be uneven. When it is not possible to test the edge and center of the sample at the same time, it will lead to errors in the test quality, which will affect the test quality. Utility Model Content

[0006] This invention provides a concrete strength testing hammer to solve the problems in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a concrete strength testing hammer, comprising a drive structure and a multi-head impact hammer structure. The drive structure includes a drive box and an inspection cover. A through groove is provided at the bottom of the drive box. Three bearing plates are slidably connected inside the through groove. Gears are rotatably connected to the top of the bearing plates. A connecting rod is fixedly connected to the bottom of the bearing plates. A fixed rack is fixedly installed inside the drive box. A movable rack is provided inside the drive box. The gears mesh with the fixed rack and the movable rack respectively.

[0008] The multi-head impact hammer structure includes a slide rod, on the surface of which three hammer heads are slidably connected. Each hammer head has a connecting hole at its top, and the hammer head is fixedly connected to the bottom end of the connecting rod through the connecting hole.

[0009] Furthermore, a bending rod is fixedly installed on the outside of the drive box, and the bottom end of the bending rod is fixedly connected to the top end of the slide rod.

[0010] Furthermore, a damping spring rod is provided on the inner wall of the drive box, and the other end of the damping spring rod is fixedly connected to the side end of the movable rack.

[0011] Furthermore, an electric telescopic rod is fixedly installed inside the drive box, and an abutting wedge is fixedly connected to the movable end of the electric telescopic rod. The inclined surface of the abutting wedge overlaps with the top of the movable rack.

[0012] Furthermore, sleeves are fixedly connected to both sides of the hammer head, and the sleeves are located on the surface of the slide rod.

[0013] Furthermore, a sliding notch is provided inside the through groove, and the corner of the supporting slide plate overlaps with the sliding notch.

[0014] Compared with the prior art, this utility model provides a concrete strength testing hammer, which has the following beneficial effects:

[0015] This concrete strength testing hammer, through its drive structure and multi-head impact hammer structure, allows for adjustable spacing between the three hammer heads within the multi-head impact hammer structure. This dynamic adjustment of the distance between the hammer heads enables simultaneous strength testing of both the edge and center areas of the concrete sample. This facilitates a more convenient assessment of the overall strength of the concrete sample, reducing testing errors and effectively improving the quality and efficiency of the testing process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is an exploded view of the driving structure of this utility model;

[0018] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0019] Figure 4 This is a schematic diagram of the multi-head impact hammer structure of this utility model.

[0020] In the diagram: 1. Drive structure; 101. Drive box; 102. Inspection cover; 103. Through slot; 104. Load-bearing slide plate; 105. Gear; 106. Connecting rod; 107. Fixed rack; 108. Movable rack; 109. Damping spring rod; 110. Electric telescopic rod; 111. Anti-collision wedge; 2. Multi-head impact hammer structure; 201. Slide rod; 202. Hammer head; 203. Sleeve tube; 204. Connecting hole; 3. Bending rod. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4 This utility model discloses a concrete strength testing hammer, including a drive structure 1 and a multi-head impact hammer structure 2. The drive structure 1 includes a drive box 101 and an inspection cover 102. The bottom end of the drive box 101 is provided with a through groove 103. Three bearing plates 104 are slidably connected inside the through groove 103. The top end of the bearing plates 104 is rotatably connected with a gear 105. The bottom end of the bearing plates 104 is fixedly connected with a connecting rod 106. A fixed rack 107 is fixedly installed inside the drive box 101. A movable rack 108 is provided inside the drive box 101. The gear 105 meshes with the fixed rack 107 and the movable rack 108 respectively.

[0023] The multi-head impact hammer structure 2 includes a slide rod 201, on which three hammer heads 202 are slidably connected. The top of each hammer head 202 has a connecting hole 204, and the hammer head 202 is fixedly connected to the bottom end of the connecting rod 106 through the connecting hole 204.

[0024] By setting up a drive structure 1 and a multi-head impact hammer structure 2, the drive structure 1 can drive the three hammer heads 202 in the multi-head impact hammer structure 2 to adjust their intervals. This allows the distance between the hammer heads 202 to be dynamically adjusted according to different testing requirements. This enables the hammer heads 202 to flexibly perform simultaneous strength testing on the edge and central areas of the concrete sample. As a result, workers can more easily assess the overall strength of the concrete sample, thereby reducing errors in strength testing and effectively improving the quality and efficiency of the testing work.

[0025] Specifically, a bending rod 3 is fixedly installed on the outside of the drive box 101, and the bottom end of the bending rod 3 is fixedly connected to the top end of the slide rod 201.

[0026] In this embodiment, the bending rod 3 provides stable support for the slide rod 201, preventing it from wobbling during use and ensuring its stability during sliding.

[0027] Specifically, a damping spring rod 109 is provided on the inner wall of the drive box 101, and the other end of the damping spring rod 109 is fixedly connected to the side end of the movable rack 108.

[0028] In this embodiment, the damping spring rod 109 provides elastic support for the movable rack 108. When the electric telescopic rod 110 moves the abutting block 111, and the abutting block 111 moves against the movable rack 108, the movable rack 108 presses against the damping spring rod 109, causing the damping spring rod 109 to contract under force. When the electric telescopic rod 110 resets the abutting block 111, the damping spring rod 109, in conjunction with its own elasticity, pushes the movable rack 108 back to its original position, causing the movable rack 108 to automatically separate from the gear 105. This facilitates the movable rack 108 to drive the gear 105 and the bearing slide plate 104 to reciprocate, thereby facilitating the adjustment of the distance between the hammers 202.

[0029] Specifically, an electric telescopic rod 110 is fixedly installed inside the drive box 101. The movable end of the electric telescopic rod 110 is fixedly connected to an abutting wedge 111, and the inclined surface of the abutting wedge 111 overlaps with the top of the movable rack 108.

[0030] In this embodiment, by setting an electric telescopic rod 110 and an abutting wedge 111, the electric telescopic rod 110 extends and drives the abutting wedge 111 to move. The abutting wedge 111 abuts against the movable rack 108 and moves, so that the movable rack 108 gradually comes into contact with the gear 105, causing the gear 105 to be unable to slide along the surface of the fixed rack 107. This causes the gear 105 to be fixed between the fixed rack 107 and the movable rack 108, thereby completing the positioning process after the gear 105 is adjusted.

[0031] Specifically, sleeves 203 are fixedly connected to both sides of the hammer head 202, and the sleeves 203 are located on the surface of the slide rod 201.

[0032] In this implementation scheme, the sleeve 203 is provided to limit the movement of the hammer head 202, preventing the hammer head 202 from deviating during movement and ensuring the stability of the hammer head 202 during movement.

[0033] Specifically, a sliding notch is provided inside the through groove 103, and the corner of the supporting slide plate 104 overlaps with the sliding notch.

[0034] In this embodiment, by setting a sliding notch, the carrying plate 104 can slide inside the through groove 103, and at the same time, it can limit the carrying plate 104, preventing the carrying plate 104 from deviating during sliding, and further ensuring the stability of the carrying plate 104 during sliding.

[0035] When in use, first move the concrete strength testing hammer above the concrete sample, then adjust the spacing between the three hammer heads 202 along the surface of the slide bar 201 so that the hammer heads 202 can flexibly perform synchronous strength testing on the edge part and the central area of ​​the concrete sample.

[0036] After the spacing between the hammers 202 is adjusted to meet the requirements of concrete sample testing, the electric telescopic rod 110 is activated. The electric telescopic rod 110 extends and drives the anti-clamping block 111 to move. The anti-clamping block 111 abuts against the movable rack 108 and moves. The movable rack 108 is pushed by the anti-clamping block 111 and slides along the inside of the drive box 101, and squeezes the damping spring rod 109.

[0037] At this time, the movable rack 108 gradually comes into close contact with the gear 105, and the gear 105 is thus fixed between the fixed rack 107 and the movable rack 108, realizing the positioning process of gear 105 position adjustment.

[0038] Finally, the concrete strength testing hammer is driven by an external power source and dropped, causing the hammer head 202 to impact the concrete sample, thereby testing the strength of the concrete sample.

[0039] In summary, this concrete strength testing hammer, through the configuration of a drive structure 1 and a multi-head impact hammer structure 2, allows for the adjustment of the spacing between the three hammer heads 202 in the multi-head impact hammer structure 2 according to different testing requirements. This enables the hammer heads 202 to flexibly and simultaneously perform strength testing on the edge and central areas of the concrete sample. Consequently, it allows workers to more easily assess the overall strength of the concrete sample, reducing testing errors and effectively improving the quality and efficiency of the testing work.

[0040] It should be noted that the specific model and specifications of the electric telescopic rod 110 in the concrete strength testing hammer need to be selected and determined according to the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail here.

[0041] Furthermore, the power supply and principle of the electric telescopic rod 110 in the concrete strength testing hammer are clear to those skilled in the art, and will not be described in detail here.

[0042] Furthermore, the working principle and wiring method of the electric telescopic rod 110 in the concrete strength testing hammer are commonplace and belong to conventional methods or common knowledge. They will not be elaborated here. Those skilled in the art can make any selections according to their needs or convenience.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A concrete strength detection hammer comprising a drive structure (1) and a multi-head impact hammer structure (2), characterized in that: The driving structure (1) includes a driving box (101) and an inspection cover (102), the bottom end of the driving box (101) is provided with a through groove (103), the inside of the through groove (103) is slidably connected with three bearing sliding plates (104), the top end of the bearing sliding plate (104) is rotatably connected with a gear (105), the bottom end of the bearing sliding plate (104) is fixedly connected with a connecting rod (106), the inside of the driving box (101) is fixedly installed with a fixed rack (107), the inside of the driving box (101) is provided with a movable rack (108), the gear (105) is respectively engaged with the fixed rack (107) and the movable rack (108). The multi-head impact hammer structure (2) includes a sliding rod (201), the surface of the sliding rod (201) is slidably connected with three hammer heads (202), the top end of the hammer head (202) is provided with a connecting hole (204), the hammer head (202) is fixedly connected with the bottom end of the connecting rod (106) through the connecting hole (204).

2. A concrete strength testing hammer according to claim 1, wherein: The outside of the driving box (101) is fixedly installed with a bending rod (3), the bottom end of the bending rod (3) is fixedly connected with the top end of the sliding rod (201).

3. The concrete strength testing hammer of claim 1, wherein: The inside wall of the driving box (101) is provided with a damping spring rod (109), the other end of the damping spring rod (109) is fixedly connected with the side end of the movable rack (108).

4. The concrete strength testing hammer of claim 1, wherein: The inside of the driving box (101) is fixedly installed with an electric telescopic rod (110), the movable end of the electric telescopic rod (110) is fixedly connected with a resisting inclined block (111), the inclined surface of the resisting inclined block (111) is overlapped with the top end of the movable rack (108).

5. The concrete strength testing hammer of claim 1, wherein: The two sides of the hammer head (202) are fixedly connected with sleeve pipes (203), the sleeve pipes (203) are located on the surface of the sliding rod (201).

6. The concrete strength testing hammer of claim 1, wherein: The inside of the through groove (103) is provided with a sliding gap, the corner of the bearing sliding plate (104) is overlapped with the sliding gap.

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