Driving mechanism for acoustic Doppler flow velocity measuring device

Abstract

The utility model discloses a driving mechanism used for an acoustic Doppler flow velocity measuring device, comprising a driving member which is provided with an output shaft, and one end of the output shaft is provided with a chain wheel; the traction unit comprises a guide rail which is arranged in an arc shape, an arc-shaped groove is formed in the guide rail, and the arc-shaped groove penetrates through the two ends of the guide rail; a chain for pulling the measuring mechanism is arranged in the arc-shaped groove; a notch communicated with the arc-shaped groove is formed in the side wall of the guide rail, and at least part of the chain wheel can stretch into the notch to be meshed with the chain. According to the utility model, the notch is arranged on the guide rail, and the chain wheel extends into the notch and is meshed with the chain, so that power transmission is realized, the chain wheel does not need to bear the gravity of the chain and the measuring mechanism, the longitudinal stress of the chain wheel is smaller, and the service life is longer.

Description

Technical Field

[0001] This utility model relates to the technical field of water flow velocity measurement devices, and in particular to a drive mechanism for an acoustic Doppler flow velocity measurement device. Background Technology

[0002] An acoustic Doppler current profiler is an instrument specifically designed to measure the velocity of water flow. It utilizes the acoustic Doppler effect, which states that the observed sound wave frequency changes when there is relative motion between the sound source and the observer. This effect can be used to accurately measure the velocity of water flow. The measuring instrument includes a lifting drive mechanism that moves the instrument up and down.

[0003] However, existing measuring instruments generally achieve lifting and lowering through transmission components such as chains, steel wires, or lead screws. In the chain-driven lifting and lowering scheme, the highest point of the chain directly engages with the output sprocket of the drive motor. This causes the output sprocket to bear the weight of the chain and the measuring instrument. Excessive vertical force on the motor's output sprocket can easily lead to damage to the output sprocket and the motor shaft.

[0004] As described in the utility model patent with publication number "CN205246688U" and patent name "Automatic Hydrological Lifting Device," it includes a frame, a drive mechanism, a main sprocket, a driven sprocket, a chain, and a slider. The main sprocket is located at the upper end of the frame, and the driven sprocket is located at the lower end of the frame. The chain passes over the main sprocket and the driven sprocket and is connected to chain connecting buckles located at the upper and lower ends of the slider. The output end of the drive mechanism is connected to the input end of the main sprocket. The chain connecting buckles are connected to the slider by screws used to tighten the chain. The frame includes an upper connecting plate, a guide post, a guide rod, and a lower connecting plate. The slider slides up and down on the guide post through a water-lubricated bearing, and the front side of the slider is attached to the inner side of the guide rod, i.e., the guide rod provides auxiliary guidance for the slider.

[0005] In the above-described scheme, the chain is directly suspended on the sprocket, which results in excessive longitudinal force on the sprocket, leading to easy damage to the sprocket and motor shaft. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by this utility model is to propose a drive mechanism for an acoustic Doppler flow velocity measurement device, which solves the problem of excessive longitudinal force on the sprocket in the prior art.

[0007] The technical solution adopted by this utility model to solve its technical problem is a driving mechanism for an acoustic Doppler flow velocity measuring device. The Doppler flow velocity measuring device includes a measuring mechanism, and the driving mechanism is disposed above the measuring mechanism to drive the measuring mechanism to move along the height direction. The driving mechanism includes:

[0008] A drive unit having an output shaft, with a sprocket at one end of the output shaft;

[0009] The traction unit includes: a guide rail, which is arc-shaped and has an arc-shaped groove that extends through both ends of the guide rail; and a chain for traction of the measuring mechanism, which enters the arc-shaped groove from one end and exits from the other end.

[0010] The guide rail has a notch on its side wall that communicates with the arc-shaped groove, and the sprocket can at least partially extend into the notch and engage with the chain.

[0011] Furthermore, a drum is also provided on the output shaft, and a steel wire for pulling the measuring mechanism is wound on the drum.

[0012] Furthermore, a traction unit is provided at each end of the output shaft, and the two chains simultaneously traction the measuring mechanism.

[0013] Furthermore, the guide rail has inner and outer surfaces that are opposite to each other, as well as a first and second surface that are opposite to each other.

[0014] The notch is formed by the outward indentation of the inner surface or the inward indentation of the outer surface.

[0015] Furthermore, the chain includes multiple chain plates and multiple pins, with the multiple chain plates connected by the pins;

[0016] The guide rail is recessed from the second side towards the first side to form the arc-shaped groove. The arc-shaped groove has a bottom surface, and the bottom surface is recessed towards the first side to form a first mounting groove. The pin can at least partially extend into the first mounting groove.

[0017] Furthermore, the arc-shaped groove also includes two groove sidewalls, which are respectively connected to the two sides of the bottom surface of the groove. The groove sidewalls are recessed inward or outward to form a second mounting groove, and the chain plate can extend at least partially into the second mounting groove.

[0018] Furthermore, the notch extends through both sidewalls of the groove.

[0019] Furthermore, the notch is semi-circular in shape.

[0020] Furthermore, the second side is located on the side of the guide rail facing the drive member.

[0021] Furthermore, the guide rail is configured in a semi-circular annular structure;

[0022] One end of the guide rail is the starting end, and the other end is the ending end. The tangent direction of the chain at the starting end is parallel to the tangent direction of the chain at the ending end.

[0023] Compared with the prior art, the present invention has at least the following beneficial effects:

[0024] (1) The chain passes through the arc-shaped groove at one end of the guide rail and exits at the other end of the guide rail, so as to suspend and guide the chain through the guide rail. At the same time, by opening a notch in the guide rail, the sprocket is inserted into the notch and meshes with the chain to realize the transmission of power. This avoids the chain being directly suspended on the sprocket. The sprocket does not need to bear the weight of the chain and the measuring mechanism. The longitudinal force on the sprocket is smaller and the service life is longer.

[0025] (2) A notch is provided on the guide rail, exposing the chain so that it can mesh with the sprocket, thus providing a more convenient meshing position. There is no need to set up multiple gears and drive shafts to change the direction of force, so that the sprocket can be directly fixed to the output shaft to mesh with the chain, simplifying the transmission structure, reducing costs and improving transmission efficiency.

[0026] (3) Both wire rope lifting and chain lifting are integrated into a single drive mechanism, allowing users to choose the appropriate lifting method for different application scenarios. Furthermore, both lifting methods are driven by the output shaft of a single drive unit, resulting in higher integration, lower cost, and a more compact structure. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the drive mechanism in the embodiment;

[0028] Figure 2 This is a schematic diagram of the structure of the guide rail and output shaft in the embodiment;

[0029] Figure 3 This is a schematic diagram of the guide rail structure in the embodiment;

[0030] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0031] In the picture:

[0032] 100. Drive component; 110. Output shaft;

[0033] 200, guide rail; 210, arc groove; 211, first mounting groove; 212, second mounting groove; 220, notch;

[0034] 300. Roll;

[0035] 400. Mounting plate;

[0036] 500, sprocket. Detailed Implementation

[0037] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0038] Please refer to Figures 1-4 This utility model discloses a drive mechanism for an acoustic Doppler flow velocity measuring device. The Doppler flow velocity measuring device includes a measuring mechanism, and the drive mechanism is disposed above the measuring mechanism to drive the measuring mechanism to move along the height direction. The drive mechanism includes:

[0039] The drive unit 100 has an output shaft 110, and a sprocket 500 is provided at one end of the output shaft 110;

[0040] The traction unit includes: a guide rail 200, which is arc-shaped, and an arc-shaped groove 210 is formed in the guide rail 200, which passes through both ends of the guide rail 200; a chain for traction of the measuring mechanism is arranged in the arc-shaped groove 210, and the chain passes through one end of the arc-shaped groove 210 and exits from the other end of the arc-shaped groove 210;

[0041] The guide rail 200 has a notch 220 on its side wall that communicates with the arc-shaped groove 210, and the sprocket 500 can at least partially extend into the notch 220 and engage with the chain.

[0042] Specifically, the chain is threaded through the arc-shaped groove 210, and both ends of the chain extend from the two ends of the guide rail 200 and are connected to the measuring mechanism. When the drive component 100 rotates, it drives the output shaft 110 to rotate, which in turn drives the sprocket 500 to rotate, and finally drives the chain to pull the measuring mechanism to move in the height direction, realizing the lifting and lowering of the measuring mechanism.

[0043] In this application, the chain passes through one end of the guide rail 200 into the arc-shaped groove 210 and exits from the other end of the guide rail 200, so as to suspend and guide the chain through the guide rail 200. Simultaneously, by creating a notch 220 in the guide rail 200, the sprocket 500 extends into the notch 220 and engages with the chain to achieve power transmission. The advantage of this arrangement is that it avoids the chain being directly suspended on the sprocket 500, the sprocket 500 does not need to bear the weight of the chain and the measuring mechanism, the longitudinal force on the sprocket 500 is smaller, and its service life is longer.

[0044] Furthermore, since this application has a notch 220 on the guide rail 200, the exposed chain at the notch 220 allows it to mesh with the sprocket 500, thus providing a more convenient meshing position. Without the need for multiple gears and drive shafts to change the direction of force, the sprocket 500 can be directly fixed to the output shaft 110 to mesh with the chain, simplifying the transmission structure, reducing costs, and improving transmission efficiency.

[0045] Furthermore, a drum 300 is also provided on the output shaft 110, and a steel wire for pulling the measuring mechanism is wound on the drum 300.

[0046] Specifically, a drum 300 is mounted on the output shaft 110, and steel wire is wound on the drum 300 and connected to the measuring mechanism. When the drive unit 100 rotates, it drives the output shaft 110 to rotate, which in turn drives the drum 300 to rotate, so as to pull the measuring mechanism up and down through the steel wire.

[0047] Therefore, this application integrates both wire rope lifting and chain lifting into a single drive mechanism, allowing users to select the appropriate lifting method for different application scenarios. Furthermore, both lifting methods are driven by the output shaft 110 of a single drive component 100, resulting in higher integration, lower cost, and a more compact structure.

[0048] Furthermore, a traction unit is provided at each end of the output shaft 110, and the two chains simultaneously traction the measuring mechanism.

[0049] Specifically, both ends of the output shaft 110 extend out of the drive member 100, and a traction unit is provided at each end of the output shaft 110. The two chains in the two traction units simultaneously traction the measuring mechanism so that the measuring mechanism has a more stable posture during the lifting process.

[0050] Furthermore, the guide rail 200 has inner and outer surfaces that are opposite to each other, as well as a first and second surface that are opposite to each other.

[0051] The inner surface is recessed outward to form the notch 220, or the outer surface is recessed inward to form the notch 220.

[0052] Specifically, the guide rail 200 has an inner side and an outer side, and the notch 220 can be provided on the inner side or the outer side. The position of the notch 220 depends on the position of the chain relative to the guide rail 200.

[0053] Furthermore, the chain includes multiple chain plates and multiple pins, with the multiple chain plates connected by the pins;

[0054] The guide rail 200 is recessed from the second side towards the first side to form the arc-shaped groove 210. The arc-shaped groove 210 has a bottom surface. The bottom surface is recessed towards the first side to form a first mounting groove 211. The pin can at least partially extend into the first mounting groove 211.

[0055] The chain includes chain plates and pins. The end of the pin protrudes from the chain plate and can extend into the first mounting groove 211. The first mounting groove 211 limits the pin and constrains the chain.

[0056] Specifically, the bottom surface of the arc-shaped groove 210 is recessed towards the first side to form a first mounting groove 211. The portion of the pin protruding from the chain plate can extend into the first mounting groove 211 and slide along it. This restraint of the chain by limiting the pin end prevents the chain from slipping out of the arc-shaped groove 210. Simultaneously, the restraint of the chain by the second mounting groove 212 further stabilizes the chain's posture during traction measurement, allowing it to mesh tightly with the sprocket 500.

[0057] Furthermore, the arc-shaped groove 210 also includes two groove sidewalls, which are respectively connected to the two sides of the bottom surface of the groove. The groove sidewalls are recessed inward or outward to form a second mounting groove 212, and the chain plate can extend at least partially into the second mounting groove 212.

[0058] Specifically, the inner sidewall of the groove is recessed inward to form a second mounting groove 212, and the outer sidewall of the groove is recessed outward to form a second mounting groove 212. The two second mounting grooves 212 are arranged opposite to each other, and the two sides of the chain plate extend into the two second mounting grooves 212 respectively. In this way, the chain plate is limited by the second mounting grooves 212, thereby constraining the chain and preventing the chain from shaking when pulling the measuring mechanism.

[0059] Furthermore, the notch 220 penetrates both sidewalls of the groove, and the notch 220 is semi-circular.

[0060] Specifically, since the notch 220 penetrates the inner and outer sidewalls of the groove, the notch 220 has a larger space to accommodate the sprocket 500, and the sprocket 500 can extend into the notch 220 to a greater extent, so that it can mesh tightly with the chain.

[0061] Furthermore, the second side is located on the side of the guide rail 200 facing the drive member 100.

[0062] Specifically, the second side is located inside the guide rail 200 (i.e., the side facing the drive member 100), and the opening of the arc-shaped groove 210 is also located inside the guide rail 200. The advantage of this arrangement is that, since the inner side of the guide rail 200 has the output shaft 110, even if the chain disengages from the arc-shaped groove 210 from the opening, the chain can fall onto the output shaft 110, thereby holding the measuring mechanism and preventing it from falling further, thus providing secondary protection.

[0063] Furthermore, the guide rail 200 is configured in a semi-circular annular structure;

[0064] One end of the guide rail 200 is the starting end, and the other end is the ending end. The tangent direction of the chain at the starting end is parallel to the tangent direction of the chain at the ending end.

[0065] Specifically, the guide rail 200 has a semi-circular ring structure, making the chains at both ends of the guide rail 200 parallel in direction. That is, the chain at the beginning moves upward and the chain at the end moves downward. In this way, the chains at the beginning and end can hang down naturally, avoiding large interference between the chain and the end of the guide rail 200, and preventing damage to the chain due to excessive friction between the chain and the end of the guide rail 200.

[0066] Furthermore, it also includes a mounting plate 400, on which a first through hole and a second through hole are formed. The drive unit 100 and the guide rail 200 are both mounted on the mounting plate 400. The two ends of the chain pass through the first through hole and are connected to the measuring mechanism, and the steel wire passes through the second through hole and is connected to the measuring mechanism.

[0067] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0068] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0069] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0070] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A drive mechanism for an acoustic Doppler current profiler, said Doppler current profiler comprising a measuring mechanism, said drive mechanism being arranged above said measuring mechanism for moving said measuring mechanism in a height direction, characterized in that, The driving mechanism comprises: a driving member having an output shaft, wherein a sprocket is arranged at one end of the output shaft; a traction unit comprising: a guide rail arranged in an arc shape, wherein an arc-shaped slot is formed in the guide rail and extends through both ends of the guide rail; a chain is arranged in the arc-shaped slot to pull the measuring mechanism, wherein the chain is inserted into one end of the arc-shaped slot and is pulled out from the other end of the arc-shaped slot; wherein a notch is formed in the sidewall of the guide rail and communicates with the arc-shaped slot, and the sprocket can at least partially extend into the notch and engage with the chain.

2. A drive mechanism for an acoustic Doppler current velocity measurement apparatus according to claim 1, wherein, A winding drum is further arranged on the output shaft, and a steel wire for pulling the measuring mechanism is wound on the winding drum.

3. A drive mechanism for an acoustic Doppler current velocity measurement apparatus according to claim 1, wherein, Both ends of the output shaft are respectively provided with a traction unit, and the two chains simultaneously pull the measuring mechanism.

4. A drive mechanism for an acoustic Doppler current profiler according to claim 1, wherein, The guide rail has an inner side and an outer side which are opposite to each other, and a first side and a second side which are opposite to each other; The inner side is outwardly recessed to form the notch, or the outer side is inwardly recessed to form the notch.

5. A drive mechanism for an acoustic Doppler current velocity measurement apparatus according to claim 4, wherein, The chain comprises a plurality of chain plates and a plurality of pin shafts, and the plurality of chain plates are connected by the plurality of pin shafts. The guide rail is recessed from the second side to the first side to form the arc-shaped slot, the arc-shaped slot has a slot bottom surface, the slot bottom surface is recessed in the direction of the first side to form a first mounting slot, and the pin shafts can at least partially extend into the first mounting slot.

6. A drive mechanism for an acoustic Doppler current velocity measurement apparatus according to claim 5, wherein, The arc-shaped slot further comprises two slot sidewalls, the two slot sidewalls are respectively connected to two sides of the slot bottom surface, the slot sidewalls are inwardly or outwardly recessed to form a second mounting slot, and the chain plates can at least partially extend into the second mounting slot.

7. A drive mechanism for an acoustic Doppler current velocity measurement apparatus according to claim 6, wherein, The notch extends through the two slot sidewalls.

8. A drive mechanism for an acoustic Doppler current velocity measurement apparatus according to claim 7, wherein, The notch is arranged in a semicircular shape.

9. A drive mechanism for an acoustic Doppler current velocity measurement apparatus according to claim 6, wherein, The second side is on one side of the guide rail facing the driving member.

10. A drive mechanism for an acoustic Doppler current profiler according to claim 1, wherein, The guide rail is arranged in a semicircular ring structure; One end of the guide rail is a starting end, and the other end is a terminal end, and the tangent direction of the chain at the starting end is parallel to the tangent direction of the chain at the terminal end.

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