Dustproof sound-amplifying sounding device and engineering mechanical equipment with dustproof sound-amplifying sounding device

Abstract

The utility model discloses a dustproof sound amplification signal sound device and engineering machinery equipment with the same. The dustproof sound amplification signal sound device comprises a sound amplification signal sound device body, a first mounting bracket and a second mounting bracket, the first mounting bracket comprises a mounting plate and a slot formed in the mounting plate, and the second mounting bracket comprises a top plate and a bolt plate which are connected with each other; the sound amplification transpose body is rotatably arranged below the top plate, a heat dissipation hole is arranged above the sound amplification transpose body, and a gap is arranged between the heat dissipation hole and the top plate; and the pin plate is detachably arranged in the slot. The sound amplification sounding device provided by the utility model can reduce the risk of badness caused by dust, and is easy to mount and dismount.

Description

Technical Field

[0001] The utility model relates to the technical fields of overhead cranes and hoisting devices, in particular to a dust-proof amplified audio device and an engineering mechanical equipment with the same. Background Technique

[0002] Overhead cranes and cranes play important production tasks in large enterprises. Since they are vertical operations, there are many reasons for unsafe accidents. To ensure the safety and operation efficiency of overhead cranes and cranes, it is very important to provide a good amplified audio communication device at the operation site. There are two main categories of existing amplified audio communication devices. One is a handheld megaphone. For example, the driver can directly shout down through the megaphone.

[0003] The other is an amplified audio device fixedly installed in the operation site, such as directly installed on an overhead crane or a crane. Since the operation sites of overhead cranes and cranes, such as electric furnace steel mills, usually have a heavy dust environment and may contain conductive dust, in such an environment, the amplified audio device is prone to short-circuit problems caused by conductive dust. Therefore, the existing amplified audio devices usually have the following deficiencies:

[0004] (1) The amplified audio device has problems of poor contact or even short circuit caused by dust, resulting in discontinuous alarm sounds or even no alarm sound at critical moments, which is not conducive to safe production;

[0005] (2) The harsh environment at the operation site is likely to damage the amplified audio device. After the damaged amplified audio device is disassembled and assembled, it is cumbersome and time-consuming.

[0006] The disclosure of the above background technical content is only used to assist in understanding the concept and technical solution of the present utility model. It does not necessarily belong to the prior art of this application, nor will it necessarily give technical guidance; without clear evidence indicating that the above content was publicly available before the filing date of this application, the above background technology should not be used to evaluate the novelty and creativity of this application. Content of the Utility Model

[0007] The purpose of the present utility model is to provide a dust-proof amplified audio device and an engineering mechanical equipment with the same, which can reduce the risk of malfunction caused by conductive dust in the amplified audio device and is easy to install and disassemble.

[0008] To achieve the above object, the technical solution adopted by the present utility model is as follows:

[0009] A dust-proof amplified audio device includes an amplified audio device body, a first mounting bracket and a second mounting bracket;

[0010] The first mounting bracket includes a mounting plate and a slot provided on the mounting plate, and the second mounting bracket includes a top plate and a pin plate connected to each other;

[0011] The audio amplification and response transposition body is rotatably arranged below the top plate. There are heat dissipation holes above the audio amplification and response transposition body, and there is a gap between the heat dissipation holes and the top plate. In the prior art, the audio amplification and response transposition body is usually directly installed in a use place such as a steel mill. By providing the top plate above the audio amplification and response transposition body in this technical solution, it is possible to reduce the entry of conductive dust into its interior through the heat dissipation holes on the audio amplification and response transposition body, thereby reducing the risk of short - circuit of the internal circuit caused by conductive dust.

[0012] The plug - in board is detachably arranged in the slot.

[0013] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, the plug - in board first extends in a first direction along the depth direction of the slot and then bends and extends in a second direction along the depth direction of the slot, and the second direction is opposite to the first direction.

[0014] When the plug - in board is in a free state, the width of the left and right sides of the lower end of the plug - in board is smaller than the width of the left and right sides of the slot, and the width of the left and right sides of the upper end of the plug - in board is larger than the width of the left and right sides of the slot.

[0015] When the plug - in board is arranged in the slot, the left and right sides of the plug - in board are in contact connection with the left and right sides of the slot.

[0016] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, the plug - in board has a V - shaped structure.

[0017] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, a dust - proof plate extending in the direction of the audio amplification and response transposition body is provided on the side of the top plate.

[0018] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, arc - shaped mounting holes are relatively provided on both sides of the dust - proof plate, and both sides of the audio amplification and response transposition body are adjustably connected to the arc - shaped mounting holes through fasteners.

[0019] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, the audio amplification and response transposition body includes a speaker. There are heat dissipation holes above the speaker, and the speaker is rotatably arranged below the top plate.

[0020] Alternatively, the audio amplification and response transposition body includes a speaker and a warning light. There are heat dissipation holes above the speaker, the speaker is rotatably arranged below the top plate, the speaker is detachably arranged below the top plate, and the warning light is arranged outside the speaker.

[0021] Further, in combination with any one or more of the foregoing technical solutions, a support frame is provided below the top plate. The support frame is disposed on the second mounting bracket. Optionally, the support frame can be mounted on the top plate or on the latch plate. The speaker is disposed on the support frame, and the mounting angle of the speaker relative to the support frame is adjustable.

[0022] Further, in combination with any one or more of the foregoing technical solutions, a first short-circuit protection circuit is provided inside the audio amplifier transposition body.

[0023] Further, in combination with any one or more of the foregoing technical solutions, a host is further included. The host is electrically connected to the audio amplifier transposition body. The host is configured to control the audio amplifier transposition body to emit a prompt signal, and a second short-circuit protection circuit is provided inside the host.

[0024] Further, in combination with any one or more of the foregoing technical solutions, the audio amplifier transposition body includes a speaker;

[0025] A microphone, a preamplifier, and a power amplifier are sequentially electrically connected inside the host, and the power amplifier is electrically connected to the speaker;

[0026] The microphone is configured to convert a sound signal into an electrical signal, and the preamplifier and the power amplifier sequentially amplify the electrical signal and then transmit it to the speaker.

[0027] Further, in combination with any one or more of the foregoing technical solutions, the slot extends in the vertical direction;

[0028] According to another aspect of the present invention, an engineering mechanical equipment with a dust-proof audio amplifier transposition is provided. The engineering mechanical equipment includes the dust-proof audio amplifier transposition as described in any one or more of the foregoing technical solutions;

[0029] The engineering mechanical equipment is a overhead crane or a crane.

[0030] The beneficial effects brought by the technical solutions provided by the present invention are as follows:

[0031] a. For the audio amplifier transposition provided by the present invention, by using the top plate disposed above the audio amplifier transposition body and the dust-proof plates around it, the part where electrical components are installed at the upper end of the audio amplifier transposition body can be protected from dust, reducing the risk of conductive dust falling into its interior through the heat dissipation holes on the audio amplifier transposition body, and further reducing the risk of internal circuit short-circuit of the audio amplifier transposition body caused by conductive dust;

[0032] b. The dust-proof audio amplifier adapter of the present utility model can be conveniently, quickly and firmly installed through the slot and the plug board in abutting fit, and it is also convenient to quickly disassemble the dust-proof audio amplifier adapter, facilitating maintenance and replacement of the dust-proof audio amplifier adapter. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 The front view schematic diagram of the dust-proof audio amplifier adapter provided for an exemplary embodiment of the present utility model;

[0035] Figure 2 The left side view schematic diagram of the dust-proof audio amplifier adapter provided for an exemplary embodiment of the present utility model;

[0036] Figure 3 The three-dimensional schematic diagram of the dust-proof audio amplifier adapter provided for an exemplary embodiment of the present utility model;

[0037] Figure 4 The explosion schematic diagram of the first dust-proof audio amplifier adapter provided for an exemplary embodiment of the present utility model;

[0038] Figure 5 The first-angle explosion schematic diagram of the second dust-proof audio amplifier adapter provided for an exemplary embodiment of the present utility model;

[0039] Figure 6 The second-angle explosion schematic diagram of the second dust-proof audio amplifier adapter provided for an exemplary embodiment of the present utility model;

[0040] Figure 7 The third-angle explosion schematic diagram of the second dust-proof audio amplifier adapter provided for an exemplary embodiment of the present utility model.

[0041] BRIEF DESCRIPTION OF THE DRAWINGS: 11 - Speaker, 111 - Heat dissipation hole, 12 - Warning light, 21 - First mounting bracket, 211 - Mounting plate, 212 - Slot, 22 - Second mounting bracket, 221 - Top plate, 222 - Plug board, 223 - Dust-proof plate, 224 - Support plate, 2241 - First through hole, 2242 - Second through hole, 225 - Adapter plate, 2252 - Third through hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] To enable those skilled in the art to better understand the solution of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0043] It should be noted that the terms "first", "second", etc. in the description and claims of the present utility model and the above-mentioned accompanying drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so that the embodiments of the present utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product or equipment comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or equipment.

[0044] In an embodiment of the present utility model, a dust-proof audio amplifier transposition is provided. Refer to Figures 1 to 7 , which includes an audio amplifier transposition body, a first mounting bracket 21 and a second mounting bracket 22;

[0045] The first mounting bracket 21 includes a mounting plate 211 and a slot 212 provided on the mounting plate 211. The second mounting bracket 22 includes a top plate 221 and a pin plate 222 connected to each other;

[0046] The audio amplifier transposition body is rotatably provided below the top plate 221. A heat dissipation hole 111 is provided above the audio amplifier transposition body, and there is a gap between the heat dissipation hole 111 and the top plate 221;

[0047] The pin plate 222 is detachably provided in the slot 212.

[0048] In an embodiment of the present utility model, the structure of the pin plate 222 is as shown in Figures 1 to 7 , which first extends in the first direction (as indicated by the "first direction" marked in Figure 6 ) in the depth direction of the slot 212 and then bends in the second direction (as shown in Figure 6extends in the direction indicated by the "second direction" marked in the figure, and the second direction is opposite to the first direction. When the plug plate 222 is in a free state, the width of the left and right sides (i.e., the left and right directions of Figure 1 ) of the bottom of the plug plate 222 is smaller than the width of the left and right sides of the slot 212 so that the plug plate 222 can be inserted into the slot 212, and the width of the left and right sides of the upper end of the plug plate 222 is larger than the width of the left and right sides of the slot 212; when the plug plate 222 is arranged in the slot 212, at least the left and right sides of the upper end of the plug plate 222 are in contact connection with the left and right sides of the slot 212 to firmly arrange the plug plate 222 in the slot 212. Among them, the upper end of the plug plate 222 can be arranged inside the slot 212 or outside the slot 212. Figure 1 In the left and right directions of Figure 1 , the width of the left and right sides of the bottom of the plug plate 222 is smaller than the width of the left and right sides of the slot 212 so that the plug plate 222 can be inserted into the slot 212, and the width of the left and right sides of the upper end of the plug plate 222 is larger than the width of the left and right sides of the slot 212; when the plug plate 222 is arranged in the slot 212, at least the left and right sides of the upper end of the plug plate 222 are in contact connection with the left and right sides of the slot 212 to firmly arrange the plug plate 222 in the slot 212. Among them, the upper end of the plug plate 222 can be arranged inside the slot 212 or outside the slot 212.

[0049] In this embodiment, the audio amplification and warning signal transposition body includes a speaker 11 and a warning light 12. A heat dissipation hole 111 is arranged above the speaker 11, and the speaker 11 is rotatably arranged below the top plate 221; the warning light 12 is detachably arranged below the top plate 221, and the warning light 12 is arranged outside the speaker 11.

[0050] Preferably, a dust-proof plate 223 extending in the direction of the audio amplification and warning signal transposition body is arranged on the side of the top plate 221. By covering the top plate 221 above the audio amplification and warning signal transposition body and using the dust-proof plate 223 to cover the part where electrical components are installed at the upper end of the audio amplification and warning signal transposition body, dust-proof protection can be provided for the audio amplification and warning signal transposition body, and the probability of short circuit of the audio amplification and warning signal transposition body (speaker 11 and warning light 12) caused by conductive dust can be reduced.

[0051] Among them, the warning light 12 is optionally installed on the top plate 221, as shown in Figure 2 and Figure 5 , and the warning light 12 can be directly fixedly installed below the top plate 221 through fasteners. A support frame is arranged below the top plate 221, and the support frame can be connected to the top plate 221 or the plug plate 222. As shown in Figures 1 to 7 , the speaker 11 is installed on the support frame, and the warning light 12 is installed on the top plate 221. Figure 2 and Figure 5 As shown in Figures 1 to 7 and Figure 7 , a support frame is arranged below the top plate 221, and the support frame can be connected to the top plate 221 or the plug plate 222. As shown in Figures 1 to 7 , the speaker 11 is installed on the support frame, and the warning light 12 is installed on the top plate 221. Figures 1 to 7 As shown in Figures 1 to 7 , the speaker 11 is installed on the support frame, and the warning light 12 is installed on the top plate 221.

[0052] As shown in Figure 6 Figure 6 and Figure 7As shown, the support frame includes a support plate 224 and an adapter plate 225 that are connected to each other. The middle part of the support plate 224 is a horizontally arranged plate-like structure. A first through hole 2241 for installing the speaker 11 is provided on the plate-like structure. Two opposite first side plates 2241 extend vertically along both sides of the plate-like structure. The support plate 224 is installed on the top plate 221 through the adapter plate 225. The adapter plate 225 includes two opposite second side plates. The two second side plates are correspondingly attached and connected to the two first side plates 2241. A second through hole 2242 is provided on the first side plate 2241, and a third through hole 2252 is provided on the second side plate. The third through hole 2252 is an arc-shaped hole. Fasteners are used to pass through the second through hole 2242 and the third through hole 2252 to fixedly connect the first side plate 2241 and the second side plate. Through the arc-shaped third through hole 2252, the support plate 224 provided with the speaker can be fixed on the adapter plate 225 (below the top plate 221) at different angles, thereby adjusting the sound-emitting direction of the speaker.

[0053] It should be noted that the protection scope of this application is not limited to the installation method of setting the speaker 11 below the top plate 221 as shown and being able to adjust the sound-emitting direction of the speaker. Other methods can also be adopted. Specifically, only by adjustably connecting both sides of the speaker 11 to a support frame with arc-shaped mounting holes provided below the top plate through fasteners can the sound-emitting direction of the speaker be adjusted. For example, the support frame may not include the support plate 224 and only include the adapter plate 225 provided with the arc-shaped third through hole. Corresponding mounting holes such as threaded holes are configured on both sides of the speaker 11. By passing bolts through the third through hole and threadedly connecting with the threaded holes, the speaker 11 can be fixedly connected to the support plate 224. Moreover, the bolts can be set at any position within the arc-shaped third through hole. Therefore, this installation method can also adjust the sound-emitting direction of the speaker during the installation process to obtain a better warning and prompting effect. Figures 4 to 7

[0054] Existing audio amplifier transposition bodies are usually directly installed in use places such as steel mills. There is a problem that conductive dust enters its interior through the heat dissipation holes on the audio amplifier transposition body, resulting in short circuits of circuit components. This technical solution can reduce the entry of conductive dust into its interior through the heat dissipation holes on the audio amplifier transposition body by providing a top plate above the audio amplifier transposition body, thereby reducing the risk of short circuits caused by conductive dust. It should be noted that since conductive dust is more likely to settle compared to non-conductive ordinary dust, setting a top plate above the audio amplifier transposition body can achieve a good effect of reducing the entry of conductive dust into the interior of the audio amplifier transposition body.

[0055] Taking the speaker 11 as an example, as Figures 4 to 7 shown, heat dissipation holes 111 are provided at the top thereof. Without the protection of the top plate 221 and the dust-proof plate 223, conductive dust can easily enter the interior of the speaker through the heat dissipation holes 111. However, with the protection of the top plate, the entry of conductive dust into the interior of the speaker can be greatly reduced. In this embodiment, there are mainly two reasons why the speaker 11 is not directly mounted on the top plate 221. On the one hand, a certain gap is provided between the top plate 211 and the upper end of the speaker 11 to ensure the heat dissipation performance of the speaker. On the other hand, after the position of the top plate 221 relative to the first mounting bracket 21 is fixed, the scheme provided in this embodiment can adjust the sound-emitting direction of the speaker. If the speaker is directly fixed below the top plate 221, the sound-emitting direction of the speaker cannot be adjusted.

[0056] In this embodiment, as Figure 4 and Figure 5 shown, the plug plate 222 is an elastic member having a V-shaped structure. Preferably, an arc transition section or an arc chamfer is provided at the bottom of the V-shaped structure. When the plug plate 222 is in a free state, the widths of the left and right sides at the bottom of the plug plate 222 (the left and right here are the left and right directions of Figure 1 ) are smaller than the widths of the left and right sides of the slot 212, and the widths of the left and right sides at the upper end of the plug plate 222 are greater than the widths of the left and right sides of the slot 212.

[0057] Among them, a plurality of mounting holes are provided on the mounting plate 211 for fixedly mounting the first mounting bracket at positions such as cranes and overhead cranes where an audio amplifier conversion device needs to be provided. As Figure 4 and Figure 5 shown, the slot 212 preferably extends in the vertical direction. The mounting plate 211 and the plug plate 222 have an L-shaped structure. By inserting the plug plate 222 into the slot 212, the audio amplifier conversion device body can be quickly mounted on the first bracket. When the audio amplifier conversion device body needs to be repaired or replaced, by pressing the left side and / or the right side of the plug plate 222 towards the middle direction, the second bracket and the audio amplifier conversion device body can be removed from the first bracket. The first bracket and the second bracket are preferably made of sheet metal parts, with low manufacturing costs.

[0058] Preferably, a first short-circuit protection circuit is provided inside the audio amplifier conversion device body for short-circuit protection of the audio amplifier conversion device body.

[0059] In this embodiment, the dust-proof amplified audio transposition further includes a host. A microphone, a preamplifier, and a power amplifier are sequentially electrically connected inside the host. The power amplifier is electrically connected to the speaker 11. The microphone is configured to convert a sound signal into an electrical signal, and the preamplifier and the power amplifier amplify the electrical signal in sequence and then transmit it to the speaker 11. Preferably, a second short-circuit protection circuit is provided inside the host to protect the host against short circuits. The above-mentioned first short-circuit protection circuit and second short-circuit protection circuit can adopt fuses or short-circuit breakers, or other short-circuit protection circuits such as over-current relay protection circuits.

[0060] In another embodiment of the present utility model, a dust-proof amplified audio transposition is provided. The difference from the above embodiment lies in the installation method of the speaker. In this embodiment, the support frame in the above embodiment is not provided. Instead, arc-shaped mounting holes are oppositely provided on both sides of the dust-proof plate 223, and threaded mounting holes are provided on both sides of the speaker 11. By passing fasteners through the arc-shaped mounting holes and connecting them with the threaded mounting holes, the sound output direction of the speaker can be adjusted.

[0061] In an embodiment of the present utility model, an engineering mechanical equipment with a dust-proof amplified audio transposition is provided. The engineering mechanical equipment includes the dust-proof amplified audio transposition described in any one of the above embodiments. The engineering mechanical equipment is a overhead crane or a crane.

[0062] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0063] The above are only specific embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A dustproof sound amplification signal transposition device, characterized in that: It comprises a sound amplification signal transposition body, a first mounting bracket (21) and a second mounting bracket (22); The first mounting bracket (21) comprises a mounting plate (211) and a slot (212) arranged on the mounting plate (211); the second mounting bracket (22) comprises a top plate (221) and a latch plate (222) connected to each other; The sound amplifying and signaling transposition body is rotatably arranged below the top plate (221), a heat dissipation hole (111) is arranged above the sound amplifying and signaling transposition body, and a gap is arranged between the heat dissipation hole (111) and the top plate (221); The latch plate (222) is detachably disposed in the slot (212).

2. The dustproof sound amplification transposition device according to claim 1, characterized in that: The latch plate (222) first extends in a first direction in the depth direction of the slot (212) and then bends to extend in a second direction in the depth direction of the slot (212), the second direction being opposite to the first direction; When the latch plate (222) is in a free state, the width of the left and right sides of the lower end of the latch plate (222) is smaller than the width of the left and right sides of the slot (212), and the width of the left and right sides of the upper end of the latch plate (222) is larger than the width of the left and right sides of the slot (212); When the latch plate (222) is arranged in the slot (212), the left and right sides of the latch plate (222) are in contact with the left and right sides of the slot (212).

3. The dustproof sound amplification transposition device according to claim 2, characterized in that: The latch plate (222) has a V-shaped structure.

4. The dustproof sound amplification transposition device according to claim 1, characterized in that: A dustproof plate (223) extending in the direction of the sound amplification signal transposition body is provided on the side surface of the top plate (221).

5. The dustproof sound amplification signal transposition device according to claim 4, characterized in that: Arc-shaped mounting holes are arranged oppositely on two sides of the dustproof plate (223), and two sides of the sound amplifying signal transposition body are adjustably connected to the arc-shaped mounting holes via fasteners.

6. The dustproof sound amplification signal transposition device according to claim 1, characterized in that: The sound amplification signal transposition body comprises a speaker (11), a heat dissipation hole (111) is arranged above the speaker (11), and the speaker (11) is rotatably arranged below the top plate (221); Alternatively, the sound amplification signal transposition body comprises a speaker (11) and a warning light (12), a heat dissipation hole (111) is provided above the speaker (11), the speaker (11) is rotatably arranged below the top plate (221), the warning light (12) is detachably arranged below the top plate (221), and the warning light (12) is arranged on the outside of the speaker (11).

7. The dustproof sound amplification signal transposition device according to claim 6, characterized in that: A support frame is provided below the top plate (221), the support frame is provided on the second mounting bracket (22), the loudspeaker (11) is provided on the support frame, and the installation angle of the loudspeaker (11) relative to the support frame is adjustable.

8. The dustproof sound amplification signal transposition device according to claim 1, characterized in that: The sound amplification signal transposition body is provided with a first short circuit protection circuit.

9. The dustproof sound amplification transposition device according to claim 1, characterized in that: It also includes a host, which is electrically connected to the sound amplification and signal transposition body. The host is configured to control the sound amplification and signal transposition body to send out a prompt signal, and a second short-circuit protection circuit is arranged in the host.

10. The dustproof sound amplification signal transposition device according to claim 9, characterized in that: The sound amplification signal transposition body comprises a loudspeaker (11); The host is provided with a microphone, a preamplifier and a power amplifier which are electrically connected in sequence, and the power amplifier is electrically connected to the speaker (11); The microphone is configured to convert an acoustic signal into an electrical signal, and the preamplifier and the power amplifier amplify the electrical signal in sequence before transmitting it to the speaker (11).

11. The dustproof sound amplification transposition device according to claim 1, characterized in that: The slot (212) extends in a vertical direction.

12. An engineering machinery equipment with dustproof sound amplification signal transposition, characterized in that: The engineering machinery equipment includes the dustproof sound amplification signal transducer as claimed in any one of claims 1 to 11; The engineering machinery equipment is an overhead travelling crane or a crane.

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