Agricultural work vehicle

Abstract

The present invention relates to a speaker mounting structure of an agricultural work vehicle. The present invention provides an agricultural work vehicle comprising: a speaker for providing sound to a boarding space; an installation board on which the speaker can be mounted; and a fastening member for mounting the speaker on the installation board with a top ceiling included in a cabin provided therebetween. According to the present invention, a worker has easy access to the speaker, and the convenience in assembly and maintenance can be ensured.

Description

agricultural work vehicles

[0001] The present invention relates to an agricultural work vehicle, and more specifically to a speaker mounting structure.

[0002] Agricultural work vehicles can perform a variety of agricultural tasks, including tilling, spraying fertilizers and pesticides, harvesting, and transporting.

[0003] Agricultural work vehicles can perform various types of agricultural work by attaching and detaching various work equipment.

[0004] Work machines include rotary tillers, plows, harrows, and loaders.

[0005] Figure 1 illustrates a typical agricultural work vehicle.

[0006] As illustrated in Fig. 1, an agricultural work vehicle (T) having a certain horsepower or more has a cabin (C).

[0007] The cabin (C) forms the operator's boarding space and isolates the boarding space from the external environment.

[0008] The cabin (C) consists of a frame structure (FU) and a roof (R).

[0009] The frame structure (FU) forms the skeleton of the cabin (C).

[0010] The roof (R) covers the upper part of the frame structure (FU).

[0011] The loop (R) is connected to a loop frame (not shown) placed on the upper part of the frame structure (FU).

[0012] The roof frame constitutes the skeleton of the roof (R) of an agricultural work vehicle (T).

[0013] Inside the loop (R) there is a space to accommodate speakers, air conditioners, piping, wires and connectors for wiring.

[0014] The exterior of the frame structure (FU) is combined with various opening doors such as a front window, openable windows and doors, and a floor plate, which, together with the roof (R), divide the passenger space.

[0015] The passenger compartment contains a driver's seat and various operating devices necessary for driving and operation, such as a steering wheel and gear lever.

[0016] Workers can perform driving and work-related operations in a comfortable environment created within a closed passenger space.

[0017] Meanwhile, as referenced in Fig. 1, a speaker (S) capable of providing sound to the passenger space is installed inside the cabin (C).

[0018] Workers inside the vehicle can listen to voice guidance and music through speakers while driving.

[0019] Figure 2 is a reference drawing for explaining a conventional speaker mounting structure.

[0020] Referring to Figure 2, the speaker (S) is usually mounted on the loop (R) side.

[0021] The roof (R) may include a top seal (TC) and a roof cover (RC).

[0022] The top ceiling (TC) is placed below the roof frame (RF) to form the ceiling surface.

[0023] The top ceiling (TC) is provided with a mounting portion (IP) on which a speaker (S) can be mounted.

[0024] A through hole (TH) is formed in the mounting portion (IP), and a fastening hole (IP-CH) for fastening to a speaker (S) is formed around the through hole (TH).

[0025] When the fastening holes (S-CH) provided in the speaker (S) and the fastening holes (IP-CH) provided in the mounting part (IP) are arranged to be in communication, the fastening bolt (B) is inserted into the fastening holes (S-CH, IP-CH) from the lower side on the passenger space side to the upper side where the roof cover (RC) is arranged.

[0026] When the fastening bolt (B) is inserted into the fastening holes (S-CH, IP-CH), the fastening nut (N) is fastened to the side of the fastening bolt (B) exposed to the upper part of the mounting portion (IP).

[0027] The roof cover (RC) covers the upper part of the top ceiling (TC) where the speaker (S) is installed, and forms the outer edge of the roof (R).

[0028] This conventional speaker mounting structure had the following problems:

[0029] First, assembly and maintenance of the speaker (S) are cumbersome.

[0030] To explain more specifically, when installing the speaker (S) on the top ceiling (TC), it is mounted by fastening bolts (B) and fastening nuts (N) positioned on both the upper and lower sides based on the top ceiling (TC), so that the speaker (S) is accessible only when the roof cover (RC) of the roof (R) is removed during assembly and maintenance.

[0031] That is, when replacing or servicing the speaker (S), the process of removing the roof cover (RC) must be involved, making maintenance cumbersome and taking a long time.

[0032] Second, the quality of the sound played from the speaker (S) could be degraded.

[0033] To explain more specifically, since agricultural work vehicles (T) mainly perform work on work sites with uneven road surfaces, relatively large vibrations occur throughout the entire vehicle while driving, in addition to vibrations caused by the power source.

[0034] In particular, in the case of the top ceiling (TC), unlike the frame structure forming the skeleton of the agricultural work vehicle (T), it is made of lightweight material, so it can vibrate together with the speaker (S) when the body vibrates, causing the speaker (S) to shake.

[0035] If the speaker (S) is shaken, collisions between internal components of the speaker (S) may occur, which not only reduces durability but also causes joints and may cause unnecessary noise to be mixed into the sound played from the speaker (S).

[0036] As a result, the vibration generated during the operation of the agricultural work vehicle (T) was transmitted to the speaker (S) mounted on the top ceiling (TC), which could act as a factor in lowering the quality of the sound reproduced from the speaker (S).

[0037] Recently, agricultural work vehicles (T) are developing in a direction that goes beyond being a means of agricultural work and increases worker convenience and satisfaction with the work environment.

[0038] Providing workers with high-quality sound also contributes to increased satisfaction with the work environment.

[0039] However, as mentioned above, agricultural work vehicles (T) not only generate their own driving noise but also transmit vibrations according to the road conditions of the work site to the speakers, which causes a deterioration in sound quality.

[0040] The above-mentioned conventional speaker mounting structure only accumulates worker fatigue due to the sound quality that can cause discomfort, and is insufficient in terms of increasing satisfaction with the work environment.

[0041] The present invention was conceived to solve the above-described problems, and was conceived from the consideration of ensuring that the speaker is firmly installed inside the cabin while ensuring convenience in assembly and maintenance.

[0042] In order to achieve this purpose, an agricultural work vehicle according to one embodiment of the present invention comprises: a vehicle body (110) for driving or performing work on a work site; a cabin (120) coupled to the vehicle body (110) and forming a passenger space (BA) for a worker; a speaker (130) for providing sound to the passenger space (BA); a mounting stand (140) on which the speaker (130) can be mounted; and a fastening member (CP) for mounting the speaker (130) to the mounting stand (140); wherein the cabin (120) comprises: a frame structure (121) forming a skeleton forming the passenger space (BA); and a roof (122) covering an upper portion of the frame structure (121); wherein the frame structure (121) comprises: a plurality of roof frames (121RF-a and 121RF-b) for supporting at least a portion of the roof (122); , and the roof (122) includes a top ceiling (122a) that is arranged downward based on the plurality of roof frames (121RF-a and 121RF-b) to form a ceiling surface of the passenger space (BA); and a roof cover (122b) that is arranged upward based on the plurality of roof frames (121RF-a and 121RF-b); and the installation base (140) can be coupled to any one of the plurality of roof frames (121RF-a and 121RF-b).

[0043] The above top sealing (122a) may be provided with an installation hole (122a-IH) through which at least a portion of the speaker (130) penetrates and is mounted so as to protrude toward the roof cover (122b).

[0044] The above frame structure (121) further includes a plurality of support columns (121C-a to 121C-d) that are provided long in the height direction of the cabin (120); and a plurality of connecting frames (121CF-a to 121CF-d) that connect the upper portions between the plurality of support columns (121C-a to 121C-d) and to which the roof (122) is coupled; and the plurality of roof frames (121RF-a and 121RF-b) can connect the plurality of connecting frames (121CF-a to 121CF-d).

[0045] The above installation stand (140) may include a joint portion (141) that is joined to the loop frame (121RF-a); and an installation portion (142) that is formed integrally with the joint portion (141) and has a through hole (142-TH) through which at least a portion of the speaker (130) can pass.

[0046] The above installation portion (142) can be provided in a ring shape with a predetermined width.

[0047] The above loop frame (121RF-a) is positioned at a predetermined height apart from the top seal (122a), and the installation stand (140) may be provided with a shape in which the connecting portion (CA) of the connecting portion (141) and the installation portion (142) is bent at a predetermined angle so that the lower surface of the installation portion (142) is positioned in close contact with the top seal (122a).

[0048] The above-mentioned installation part (142) is provided with fastening holes (hereinafter referred to as 'fastening holes (142-CH) of the installation stand') to which the fastening member (CP) can be fastened, and the front part from which sound is transmitted from the speaker (130) faces the passenger space (BA), and the rear part protruding rearward from the front part is arranged to penetrate the installation hole (122a-IH), so that the speaker (130) can be mounted inside the cabin (120) by fastening the end part of the fastening member (CP) to the fastening hole (142-CH) of the installation stand.

[0049] It may further include a ring-shaped buffer member (150) placed between the speaker (130) and the top sealing (122a).

[0050] A speaker cover (160) covering the front of the above speaker (130); In addition, the speaker cover (160), the speaker (130), the buffer member (150) and the top sealing (122a) are provided with through-holes (160-TH, 130-TH, 150-TH, 122a-TH) through which the fastening member (CP) can pass, and the fastening member (CP) sequentially passes through the through-holes (160-TH, 130-TH, 150-TH, 122a-TH) provided in the speaker cover (160), the speaker (130), the buffer member (150) and the top sealing (122a) upward from the passenger space (BA) side, and the end portion is fastened to the fastening hole (142-CH) of the installation stand, thereby enabling the speaker (130) to be mounted inside the cabin (120).

[0051] As described above, according to the present invention, the following effects can be obtained.

[0052] First, it ensures easy access for workers to the speaker and ensures convenience in assembly and maintenance.

[0053] Second, the speakers are firmly mounted and can minimize the impact of vibrations caused during operation of agricultural work vehicles.

[0054] Third, it provides high-quality sound to workers and contributes to improving satisfaction with the work environment.

[0055] Ultimately, it can contribute to improving the quality competitiveness of agricultural work vehicles and their advancement.

[0056] Figure 1 is a drawing illustrating a typical agricultural work vehicle.

[0057] Figure 2 is a drawing for explaining a conventional speaker mounting structure.

[0058] Figure 3 is a drawing for explaining an agricultural work vehicle according to one embodiment of the present invention.

[0059] Figures 4 to 7 are drawings illustrating a speaker mounting structure in an agricultural work vehicle according to one embodiment of the present invention.

[0060] A preferred embodiment according to the present invention is described with reference to the attached drawings, but for the sake of brevity, descriptions of well-known components are omitted or compressed as much as possible.

[0061]

[0062] Figure 3 is a reference drawing for explaining an agricultural work vehicle (100) according to one embodiment of the present invention.

[0063] Referring to FIG. 3, an agricultural work vehicle (100) according to one embodiment of the present invention includes a vehicle body (110), a cabin (120), a speaker (130), an installation stand (140), and a fastening member (CP).

[0064] The vehicle body (110) drives to the work target site or supports the work of the work machine on the work target site.

[0065] The vehicle body (110) is equipped with components for driving and performing work.

[0066] Examples of these components include powertrains, transmissions, and steering systems.

[0067] The cabin (120) is connected to the main body (110) and forms a passenger space (BA) for a worker who performs operations necessary for at least one of driving and working.

[0068] In the passenger compartment (BA), various control means necessary for driving an agricultural work vehicle (100), such as a driver's seat, steering wheel, brake pedal, gear lever, and accelerator pedal, are arranged.

[0069] The cabin (120) forms a boarding space (BA) to protect workers from the external environment (rain, snow, various pollutants such as flying dust, etc.).

[0070] The cabin (120) includes a frame structure (121) and a roof (122).

[0071] The frame structure (121) forms a skeleton that forms the boarding space (BA).

[0072] The frame structure (121) may include a plurality of support columns (121C-a, 121C-b, 121C-c, 121C-d), a plurality of connecting frames (121CF-a, 121CF-b, 121CF-c, 121CF-d), and a plurality of roof frames (121RF-a and 121RF-b).

[0073] A plurality of support columns (121C-a to 121C-d) are provided long in the height direction of the cabin (120).

[0074] A plurality of connecting frames (121CF-a to 121CF-d) connect the upper portions between a plurality of supporting columns (121C-a to 121C-d).

[0075] A loop (122) is connected to a plurality of connecting frames (121CF-a to 121CF-d).

[0076] A plurality of loop frames (121RF-a and 121RF-b) connect a plurality of connecting frames (121CF-a to 121CF-d) and support at least a portion of the loop (122).

[0077] For reference, only some of the loop frames (121RF-a and 121RF-b) among the multiple loop frames are illustrated in FIG. 3, but the number is not limited thereto.

[0078] A plurality of connecting frames (121CF-a to 121CF-d) and a plurality of loop frames (121RF-a and 121RF-b) constitute the skeleton of the loop (122).

[0079] The exterior of the frame structure (121) is combined with various opening and closing doors such as a front window, openable windows and doors, and a floor plate to define a passenger space (BA) together with a roof (122).

[0080] The loop (122) covers the upper part of the frame structure (121).

[0081] The roof (122) includes a top seal (122a) and a roof cover (122b).

[0082] The top ceiling (122a) is positioned downward relative to the roof frame (121RF-a and 121RF-b) to form the ceiling surface of the passenger space (BA).

[0083] The roof cover (122b) is positioned above the roof frame (121RF-a and 121RF-b).

[0084] The loop cover (122b) forms the outer surface of the loop (122).

[0085] Between the top ceiling (122a) and the roof cover (122b), there is provided a receiving space (CS) that can accommodate at least one of a speaker (130), an air conditioner, a pipe, a wire, and a connector for wiring.

[0086] The speaker (130) is configured to provide sound to the passenger compartment (BA).

[0087] A plurality of speakers (130) may be provided.

[0088] Multiple speakers may reproduce sounds in the same frequency range, but they may also reproduce sounds in different frequency ranges.

[0089] For example, among multiple speakers, one speaker may be equipped with a woofer unit specialized in reproducing low-frequency sounds, and another speaker may be equipped with a tweeter unit specialized in reproducing high-frequency sounds.

[0090] This is just one example, the speaker can be configured with any of a woofer unit, a full-range unit, or a tweeter unit.

[0091] The speaker (130) can be installed inside the cabin (120), more specifically on the roof (122) side.

[0092] A specific description of the mounting structure of these speakers (130) will be provided later.

[0093] The installation stand (140) is configured to allow a speaker (130) to be mounted.

[0094] The installation stand (140) can be positioned in the receiving space (CS) provided by the top seal (122a) and the roof cover (122b).

[0095] The installation stand (140) is connected to one of the loop frames (121RF-a and 121RF-b) that is positioned adjacent to the installation hole (122a-IH).

[0096] The installation stand (140) is provided in a number corresponding to the number of speakers (130) mounted on the loop (122) side.

[0097] The fastening member (CP) is configured to mount the speaker (130) on the installation stand (140).

[0098] The fastening member (CP) can be provided with a fastening screw.

[0099] The end portion of the fastening member (CP) can be screw-connected with a thread formed in a fastening hole (hereinafter collectively referred to as “fastening hole (142-CH) of the installation stand”) provided in the installation stand (140).

[0100] Since the fastening member (CP) and the fastening hole (142-CH) of the installation stand are fastened, a separate configuration for fastening with a fastening screw such as a nut is not required.

[0101] Hereinafter, with reference to the drawings, the mounting structure of the speaker (130) in the agricultural work vehicle (100) proposed by the present invention will be described in detail.

[0102] However, the mounting structure of the speakers (130) mounted on the loop (122) side is the same. In the following description, the mounting structure for one speaker (130) is described for convenience of explanation.

[0103] <Description of speaker mounting structure>

[0104] FIGS. 4 to 7 are drawings illustrating a speaker mounting structure in an agricultural work vehicle (100) according to one embodiment of the present invention. FIGS. 4 and 5 are, in order, an exploded perspective view and a perspective view illustrating a speaker mounting portion in an agricultural work vehicle (100) according to one embodiment of the present invention, FIG. 6 is a perspective view illustrating an excerpt of the installation stand illustrated in FIG. 5, and FIG. 7 is a cross-sectional view illustrating a cut surface taken along line AA' illustrated in FIG. 5.

[0105] Referring to FIGS. 4 to 7 in addition to FIG. 3 described above, the present invention proposes that the speaker (130) be mounted inside the cabin (120) by fastening the end of the fastening member (CP) to the fastening hole (142-CH) of the installation stand in a state where the front part from which sound is transmitted from the speaker (130) faces the passenger space (BA) and the rear end part protruding rearward from the front part passes through the installation hole (122a-IH) provided in the top ceiling (122a).

[0106] That is, the fastening member (CP) and the installation stand (140) are fastened, and the speaker cover (160), speaker (130), buffer member (150), and top sealing (122a) are sequentially arranged between them.

[0107] Below, the above-mentioned configurations will be described in more detail, but any description that overlaps with that mentioned in the description of the agricultural work vehicle (100) above will be omitted.

[0108] The fastening member (CP) is screw-connected to the thread formed in the fastening hole (142-CH) of the installation stand and can be fastened to each other.

[0109] The fastening structure between the fastening member (CP) and the fastening hole (142-CH) of the installation stand enables assembly and maintenance of the speaker (130) inside the cabin (120) even when the roof (122) is not disassembled, unlike the conventional speaker mounting structure.

[0110] Since assembly and maintenance of the speaker (130) can be easily performed inside the cabin (120), the time required for assembly and maintenance can be shortened and the burden on maintenance personnel can be reduced.

[0111] The speaker cover (160) is configured to cover the front of the speaker (130).

[0112] The speaker cover (160) protects the speaker (130) from external impact or foreign substances.

[0113] The speaker cover (160) is provided with first through holes (160-TH) through which a fastening member (CP) can pass.

[0114] The speaker (130) is configured to provide sound that can be heard by workers riding in the cabin (120).

[0115] The edge of the speaker (130) is provided with installation wings (130a) that protrude outward.

[0116] A second through hole (130-TH) through which a fastening member (CP) can pass is formed in the installation wing (130a).

[0117] The buffer member (150) is placed between the speaker (130) and the top ceiling (122a).

[0118] The buffer member (150) is provided in the shape of a ring with an empty center.

[0119] The buffer member (150) can prevent vibrations generated during operation of the agricultural work vehicle (100) from being transmitted to the speaker (130).

[0120] The buffer member (150) absorbs the vibration of the speaker (130) when the speaker (130) reproduces sound and vibrates, and prevents the noise generated by collisions between adjacent components from being mixed into the sound transmitted from the speaker (130). In addition, it can suppress unnecessary vibration (resonance) that may occur inside the speaker (130), thereby preventing sound from being distorted.

[0121] For example, the buffer member (150) may be made of sponge material.

[0122] The buffer member (150) can contribute to improving the quality of sound transmitted from the speaker (130).

[0123] A third through hole (150-TH) through which a fastening member (CP) can pass is formed in the buffer member (150).

[0124] The top ceiling (122a) is positioned downward based on the roof frame (121RF-a) to form the ceiling surface of the passenger space (BA).

[0125] The top ceiling (122a) is provided with an installation hole (122a-IH) through which at least a portion of the speaker (130) penetrates and is mounted so as to protrude toward the roof cover (122b).

[0126] The rear end of the speaker (130) passes through the installation hole (122a-IH) and is placed in the receiving space (CS) provided between the top seal (122a) and the roof cover (122b).

[0127] Fourth through holes (122a-TH) are formed around the installation hole (122a-IH) through which a fastening member (CP) can pass.

[0128] The area surrounding the installation hole (122a-IH) is provided in a shape in which the area facing the installation wing (130a) of the speaker (130) is deleted.

[0129] That is, the top ceiling (122a) and the speaker (130) have a structure in which they do not directly contact each other.

[0130] This speaker (130) mounting structure can minimize the direct influence of vibration transmitted to the top ceiling (122a) during operation of the agricultural work vehicle (100) on the speaker (130).

[0131] The installation stand (140) includes a joining part (141) and an installation part (142).

[0132] The connecting portion (141) is connected to the loop frame (121RF-a).

[0133] The roof frame (121RF-a) is spaced apart from the top ceiling (122a) by a predetermined height.

[0134] The installation part (142) is formed integrally with the joining part (141), and is provided with a fifth through hole (142-TH) through which at least a part of the speaker (130) can pass.

[0135] The installation portion (142) can be provided in a ring shape with a predetermined width.

[0136] More specifically, not only the installation part (142), but also the buffer member (150) and top sealing (122a) placed at the rear end of the speaker (130) have a central area deleted, but have a shape that can hold the edge of the speaker (130).

[0137] The installation stand (140) is provided in a shape in which the connecting portion (CA) of the joint portion (141) and the installation portion (142) are bent at a predetermined angle.

[0138] Referring to Fig. 6, as the connecting portion (CA) is bent, the joining portion (141) and the installation portion (142) can be formed in an ‘L’ shape.

[0139] The shape of this installation stand (140) is such that the lower surface of the installation part (142) can be placed in close contact with the top seal (122a).

[0140] The installation stand (140) is made of metal and allows the speaker (130) to be firmly fixed to the roof (122) side.

[0141] When the speaker (130) is firmly fixed by the installation stand (140), unnecessary shaking of the speaker (130) can be prevented.

[0142] When the speaker (130) is firmly fixed, the sound quality can also be prevented from being degraded by vibration of the speaker (130) itself or vibration that may occur during operation of the agricultural work vehicle (100).

[0143] In summary, the present invention proposes a speaker (130) mounting structure that enables the speaker (130) to be more firmly mounted on an agricultural work vehicle (100) than conventional methods. Accordingly, the present invention can contribute to reducing worker fatigue due to the sound quality of the speaker (130) and increasing satisfaction with the work environment.

[0144] The above-described embodiments merely illustrate preferred examples of the present invention, and it may have various applications. Therefore, the present invention should not be construed as limited to the above-described content. Instead, the scope of the present invention should be construed within the scope of the separately described claims and their equivalents.

Claims

1. Vehicle body (110) driving or performing work at the work site; A cabin (120) that is connected to the vehicle body (110) and forms a passenger space (BA) for the operator; A speaker (130) for providing sound to the above boarding space (BA); An installation stand (140) on which the above speaker (130) can be mounted; and A fastening member (CP) for mounting the speaker (130) to the installation stand (140) is included; The above cabin (120) is, A frame structure (121) forming the skeleton that forms the above boarding space (BA); and A loop (122) covering the upper part of the above frame structure (121); The above frame structure (121) is A plurality of loop frames (121RF-a and 121RF-b) supporting at least a portion of the above loop (122); The above loop (122) is A top ceiling (122a) is positioned below the plurality of loop frames (121RF-a and 121RF-b) and forms the ceiling surface of the passenger space (BA); and It includes a roof cover (122b) positioned above the plurality of loop frames (121RF-a and 121RF-b); The above installation stand (140) is connected to one of the plurality of loop frames (121RF-a and 121RF-b) Agricultural work vehicles (100).

2. In paragraph 1, The above top sealing (122a) is provided with an installation hole (122a-IH) through which at least a part of the speaker (130) penetrates and is mounted so as to protrude toward the roof cover (122b). Agricultural work vehicles (100).

3. In paragraph 1, The above frame structure (121) is A plurality of support pillars (121C-a to 121C-d) arranged long in the height direction of the above cabin (120); and It further includes a plurality of connecting frames (121CF-a to 121CF-d) connecting the upper portions between the plurality of support columns (121C-a to 121C-d) and to which the loop (122) is connected; The above plurality of loop frames (121RF-a and 121RF-b) connect between the above plurality of connecting frames (121CF-a to 121CF-d). Agricultural work vehicles (100).

4. In paragraph 2, The above installation stand (140) is, A joining portion (141) that is joined to the above loop frame (121RF-a); and An installation part (142) formed integrally with the above-mentioned connecting part (141), but having a through hole (142-TH) through which at least a part of the speaker (130) can pass; Agricultural work vehicles (100).

5. In paragraph 4, The above installation part (142) is provided in a ring shape with a predetermined width. Agricultural work vehicles (100).

6. In paragraph 4, The above loop frame (121RF-a) is placed at a predetermined height apart from the top ceiling (122a), The above installation stand (140) is arranged so that the lower surface of the above installation part (142) is placed in close contact with the above top sealing (122a), and the connecting portion (CA) of the above joining portion (141) and the above installation part (142) is formed in a shape that is bent at a predetermined angle. Agricultural work vehicles (100).

7. In paragraph 4, The above installation part (142) is provided with fastening holes (hereinafter referred to as 'fastening holes of the installation stand (142-CH)') to which the fastening member (CP) can be fastened. The front part from which sound is transmitted from the speaker (130) faces the passenger space (BA), and the rear part protruding rearward from the front part is positioned to penetrate the installation hole (122a-IH), and the end part of the fastening member (CP) is fastened to the fastening hole (142-CH) of the installation stand, thereby mounting the speaker (130) inside the cabin (120). Agricultural work vehicles (100).

8. In paragraph 1, Further comprising a ring-shaped buffer member (150) disposed between the speaker (130) and the top sealing (122a); Agricultural work vehicles (100).

9. In paragraph 7, Further comprising a speaker cover (160) covering the front of the speaker (130); The speaker cover (160), the speaker (130), the buffer member (150) and the top sealing (122a) are each provided with through holes (160-TH, 130-TH, 150-TH, 122a-TH) through which the fastening member (CP) can pass. The above fastening member (CP) sequentially passes through the through holes (160-TH, 130-TH, 150-TH, 122a-TH) provided in each of the speaker cover (160), the speaker (130), the buffer member (150) and the top sealing (122a) upward from the side of the passenger space (BA), and the end portion is fastened to the fastening hole (142-CH) of the installation stand, thereby mounting the speaker (130) inside the cabin (120). Agricultural work vehicles (100).

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