Height-adjustable noise measuring instrument

Abstract

The utility model provides a height-adjustable noise measuring instrument, which relates to the technical field of noise measurement, and comprises a bottom plate, the top of the bottom plate is fixedly connected with a mounting rack, the inner side of the mounting rack is rotatably connected with a lifting assembly, and the outer side of the lifting assembly is fixedly connected with a clamping assembly; according to the height-adjustable noise measuring instrument, the pull rod is pulled to drive the clamping tooth block to move, so that limitation on the circular gear is relieved, the rack is pushed to enable the sliding block to drive the rack to move in the sliding groove, the rack is attached to the measuring instrument body to clamp the measuring instrument body, and the height of the measuring instrument is adjusted. The pull rod is loosened, so that the spring drives the pull rod to reset, the clamping tooth block limits the gear, the rack is prevented from deviating due to the influence of external force, shaking caused by the influence of wind power at a high position can be prevented, shaking can be prevented by clamping the measuring instrument body during height adjustment, and the safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of noise measuring instruments, specifically a height adjustable noise measuring instrument, belong to noise measurement technical field. BACKGROUND

[0002] Noise measuring instrument is many in noise measuring instrument species, most basic, most commonly used is sound level meter and spectrum analyzer, can be divided into general sound level meter, impulse sound level meter and integral sound level meter according to use, can be divided into four types, namely 0 type, 1 type, 2 type and 3 type according to accuracy. The accuracy of 0 type sound level meter is ±0.4 decibel, which is laboratory standard sound level meter;The accuracy of 1 type sound level meter is ±0.7 decibel, which is generally used in laboratory or acoustic conditions can be strictly controlled in situ;The accuracy of 2 type sound level meter is ±1 decibel, suitable for general field noise measurement;The accuracy of 3 type sound level meter is ±1.5 decibel, generally used for general survey of field noise.

[0003] The authorized patent with publication number CN209820626U discloses a height-adjustable noise measuring device, relating to pipe cutting equipment technical field, comprising a noise measuring instrument main body, a fixing groove is formed in the inner wall of the both sides of the top of the noise measuring instrument main body, a horizontally arranged connecting block is movably sleeved in the fixing groove, a vertically arranged bolt is threadedly connected to the inner wall of the both ends of the top of the noise measuring instrument main body, an active hole is formed in the inner wall of the connecting block in the fixing groove, the bolt is movably sleeved in the active hole, and a vertically arranged threaded rod is rotatably connected to the bottom of the connecting block. The utility model has the advantages of reasonable structure, adjustable height of the noise measuring instrument, detachable adjustment components of the noise measuring instrument, high working performance, convenient use and practicality.

[0004] The above device can adjust the height, but the worker needs to hold the device in hand for measurement, which will cause the device to shake and even fall and be damaged due to the influence of wind at high altitude, and the device does not have a clamping assembly for the measuring instrument, so the stability of the measuring instrument during height adjustment cannot be guaranteed. Therefore, a height-adjustable noise measuring instrument is proposed. UTILITY MODEL CONTENTS

[0005] The utility model discloses a height-adjustable noise measuring instrument to solve the problem that the stability of the measuring instrument during height adjustment cannot be guaranteed in the prior art.

[0006] The utility model discloses a height-adjustable noise measuring instrument to solve the problem that the stability of the measuring instrument during height adjustment cannot be guaranteed in the prior art.

[0007] The lifting assembly comprises a threaded rod, the threaded rod is rotationally connected between the inner sides of the mounting frame, the outer side of the threaded rod is fixedly connected with a first bevel gear, the inner side of the mounting frame is rotationally connected with a rotating shaft, the end of the rotating shaft is fixedly connected with a second bevel gear, and the outer side of the threaded rod is screwed with a movable block.

[0008] Further, the clamping assembly comprises a mounting plate, a sliding groove is formed in the top of the mounting plate, a sliding block is slidably connected in the inner cavity of the sliding groove, the top of the sliding block is fixedly connected with a rack, the outer side of the rack is fixedly connected with a clamping plate, a pull rod is inserted into the top of the mounting plate, the outer side of the pull rod is fixedly connected with a clamping tooth block, a spring is fixedly connected to the top of the mounting plate, the spring is fixedly connected with the clamping tooth block, a rotating rod is fixedly connected to the top of the mounting plate, the outer side of the rotating rod is fixedly connected with a circular gear, and the mounting plate is provided with a measuring instrument body.

[0009] Further, the rotating shaft penetrates the inner cavity of the mounting frame and extends to the outer side of the mounting frame, the end of the rotating shaft is fixedly connected with a rotating disc, and the rotating disc can drive the rotating shaft to rotate, thereby facilitating the adjustment of the staff.

[0010] Further, the outer side of the mounting frame is sleeved with a mounting ring, the mounting ring is fixedly connected with the movable block, the mounting ring is sleeved on the outer side of the mounting frame, the movable track of the movable block is guided, and the mounting of the mounting plate is facilitated.

[0011] Further, the top of the bottom plate is provided with a threaded groove, and the inner cavity of the threaded groove is screwed with a fixing bolt, the bottom plate is fixed through the cooperation of the fixing bolt and the threaded groove, and shaking during height adjustment is prevented.

[0012] Further, the circular gear is meshed with the rack, the outer side of the clamping plate is fixedly connected with an anti-skid pad, the anti-skid pad can prevent the measuring instrument body from slipping, and the stability is improved.

[0013] The height-adjustable noise measuring instrument has the following beneficial effects:

[0014] 1. The height-adjustable noise measuring instrument can fix the bottom plate through the cooperation of the fixing bolt and the threaded groove, drive the rotating shaft and the second bevel gear to rotate through the rotation of the rotating disc, and then drive the first bevel gear and the threaded rod to rotate, so that the movable block is forced to move and drives the mounting ring and the mounting plate to move, and then drives the measuring instrument body to move for height adjustment, the bottom plate can be fixed to prevent shaking during height adjustment, and the stability is improved.

[0015] 2、The height-adjustable noise measuring instrument is pulled by pulling the pull rod, so that the pull rod drives the clamping tooth block to move, thereby releasing the restriction of the circular gear, pushing the rack to drive the sliding block to move in the sliding groove, so that the rack is attached to the measuring instrument body to clamp the measuring instrument body, loosening the pull rod to drive the pull rod to reset, so that the clamping tooth block limits the circular gear, prevents the rack from being affected by external force and deviating, and prevents shaking caused by wind force at high altitude, and the clamping of the measuring instrument body during height adjustment can prevent shaking and improve safety. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a three-dimensional structure schematic diagram of the utility model;

[0017] Figure 2 It is a sectional structure schematic diagram of the lifting assembly of the utility model;

[0018] Figure 3 It is a structure schematic diagram of the clamping assembly in the utility model;

[0019] Figure 4 It is a sectional structure schematic diagram of the clamping assembly in the utility model.

[0020] The drawings are explained: 100, bottom plate; 110, mounting frame; 111, threaded rod; 112, first bevel gear; 120, rotating shaft; 121, second bevel gear; 122, rotating disc; 130, movable block; 131, mounting ring; 140, threaded groove; 141, fixed bolt; 200, mounting plate; 210, sliding groove; 211, sliding block; 212, rack; 220, clamping plate; 221, non-slip pad; 230, pull rod; 231, clamping tooth block; 232, spring; 240, rotating rod; 241, circular gear; 250, measuring instrument body; DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0022] Please refer to Figures 1-4The utility model discloses height adjustable noise measuring instrument, including bottom plate 100, the top fixedly connected with mounting bracket 110 of bottom plate 100, the inner side rotationally connected with lifting assembly of mounting bracket 110, the outer side fixedly connected with clamping assembly of lifting assembly, lifting assembly includes threaded rod 111, threaded rod 111 rotationally connected between the inner side of mounting bracket 110, the outer side fixedly connected with first bevel gear 112 of threaded rod 111, the inner side rotationally connected with pivot 120 of mounting bracket 110, the fixedly connected with second bevel gear 121 of the end of pivot 120, the outer side of threaded rod 111 is screwed with movable block 130, pivot 120 penetrates the inner chamber of mounting bracket 110, and extends to the outside of mounting bracket 110, the fixedly connected with turntable 122 of the end of pivot 120, the outside of mounting bracket 110 is sleeved with mounting ring 131, and mounting ring 131 is fixedly connected with movable block 130, the top of bottom plate 100 is opened with thread groove 140, the inner chamber of thread groove 140 is screwed with fixed bolt 141, can be fixed with thread groove 140 through the cooperation of fixed bolt 141 and thread groove 140 to bottom plate 100, by rotating turntable 122 drive pivot 120 and second bevel gear 121 rotation, and then drive first bevel gear 112 and threaded rod 111 rotation, to make movable block 130 force moves and drive mounting ring 131 and mounting plate 200 move, and then drive measuring instrument body 250 moves and adjusts height, can be fixed to bottom plate 100 to prevent when adjusting height and produce the shake, improved stability.

[0023] Please refer to Figure 1 , Figure 3 and Figure 4The clamping assembly comprises a mounting plate 200, a sliding groove 210 is formed in the top of the mounting plate 200, a sliding block 211 is slidably connected in the inner cavity of the sliding groove 210, a rack 212 is fixedly connected to the top of the sliding block 211, a clamping plate 220 is fixedly connected to the outer side of the rack 212, a pull rod 230 is inserted into the top of the mounting plate 200, a clamping tooth block 231 is fixedly connected to the outer side of the pull rod 230, a spring 232 is fixedly connected to the top of the mounting plate 200 and fixedly connected with the clamping tooth block 231, a rotating rod 240 is fixedly connected to the top of the mounting plate 200, a circular gear 241 is fixedly connected to the outer side of the rotating rod 240, a measuring instrument body 250 is installed on the top of the mounting plate 200, the circular gear 241 is meshed with the rack 212, an antiskid pad 221 is fixedly connected to the outer side of the clamping plate 220, the pull rod 230 is pulled to drive the clamping tooth block 231 to move, so that the circular gear 241 is released from the limitation, the rack 212 is pushed to drive the sliding block 211 to move in the sliding groove 210, the rack 212 is attached to the measuring instrument body 250 to clamp the measuring instrument body 250, the pull rod 230 is loosened to drive the spring 232 to reset the pull rod 230, the clamping tooth block 231 is used for limiting the circular gear 241, the rack 212 is prevented from being deviated due to external force, the measuring instrument body 250 is prevented from shaking due to wind force at a high place, the measuring instrument body 250 is clamped when the height is adjusted, and the safety is improved.

[0024] In use, the bottom plate 100 can be fixed through cooperation of the fixing bolt 141 and the threaded groove 140, the rotating disc 122 is rotated to drive the rotating shaft 120 and the second bevel gear 121 to rotate, the first bevel gear 112 and the threaded rod 111 are further driven to rotate, the movable block 130 is forced to move and drives the mounting ring 131 and the mounting plate 200 to move, and the measuring instrument body 250 is driven to move to adjust the height, and the bottom plate 100 can be fixed to prevent shaking during height adjustment.

[0025] When measuring, the pull rod 230 is pulled to drive the clamping tooth block 231 to move, so that the circular gear 241 is released from the limitation, the rack 212 is pushed to drive the sliding block 211 to move in the sliding groove 210, the rack 212 is attached to the measuring instrument body 250 to clamp the measuring instrument body 250, the pull rod 230 is loosened to drive the spring 232 to reset the pull rod 230, the clamping tooth block 231 is used for limiting the circular gear 241, the rack 212 is prevented from being deviated due to external force, the measuring instrument body 250 is prevented from shaking due to wind force at a high place, the measuring instrument body 250 is clamped when the height is adjusted, and shaking is prevented.

[0026] It should be noted that the measuring instrument body 250 includes a microphone, a preamplifier, an attenuator, a filter, an effective value detector and a display screen, which is the first conversion link of noise measurement by converting sound signals into electric signals, the electric signals output by the microphone are preliminarily amplified through the preamplifier to ensure that the signal strength is suitable for subsequent processing, then the signal level is adjusted through the attenuator to avoid that the subsequent circuit is damaged by the too strong signal, at the same time, the signal dynamic range is controlled, the signal is converted into measurable sound level value, the measurement result is displayed in real time, and the data is displayed through the display.

[0027] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. The skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the utility model, under the premise of not departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements all fall into the scope of the utility model claimed to be protected. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A height-adjustable noise measuring instrument, comprising a base plate (100), a mounting rack (110) fixedly connected to the top of the base plate (100), characterized in that: The inner side of the mounting frame (110) is rotationally connected with a lifting assembly, and the outer side of the lifting assembly is fixedly connected with a clamping assembly; The lifting assembly comprises a threaded rod (111), the threaded rod (111) is rotationally connected between the inner side of the mounting frame (110), the outer side of the threaded rod (111) is fixedly connected with a first bevel gear (112), the inner side of the mounting frame (110) is rotationally connected with a rotating shaft (120), the end of the rotating shaft (120) is fixedly connected with a second bevel gear (121), and the outer side of the threaded rod (111) is screwed with a movable block (130).

2. A height adjustable noise meter according to claim 1, wherein: The clamping assembly comprises a mounting plate (200), the top of the mounting plate (200) is provided with a sliding groove (210), the inner cavity of the sliding groove (210) is slidably connected with a sliding block (211), the top of the sliding block (211) is fixedly connected with a rack (212), the outer side of the rack (212) is fixedly connected with a clamping plate (220), the top of the mounting plate (200) is inserted with a pull rod (230), the outer side of the pull rod (230) is fixedly connected with a clamping tooth block (231), the top of the mounting plate (200) is fixedly connected with a spring (232), the spring (232) is fixedly connected with the clamping tooth block (231), the top of the mounting plate (200) is fixedly connected with a rotating rod (240), the outer side of the rotating rod (240) is fixedly connected with a circular gear (241), and the top of the mounting plate (200) is provided with a measuring instrument body (250).

3. A height adjustable noise meter according to claim 2, wherein: The rotating shaft (120) penetrates the inner cavity of the mounting frame (110) and extends to the outer side of the mounting frame (110), and the end of the rotating shaft (120) is fixedly connected with a rotating disc (122).

4. The height adjustable noise meter of claim 1, wherein: The outer side of the mounting frame (110) is sleeved with a mounting ring (131), and the mounting ring (131) is fixedly connected with the movable block (130).

5. The height adjustable noise meter of claim 1, wherein: The top of the bottom plate (100) is provided with a threaded groove (140), and the inner cavity of the threaded groove (140) is screwed with a fixing bolt (141).

6. The height adjustable noise meter of claim 2, wherein: The circular gear (241) and the rack (212) are in meshing relationship, and the outer side of the clamping plate (220) is fixedly connected with an anti-skid pad (221).

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