Energy-saving silent generator set convenient to assemble

Abstract

The invention provides an energy-saving silent generator set convenient to assemble, and belongs to the technical field of generator sets, the energy-saving silent generator set convenient to assemble comprises an assembly underframe, a radiator, an engine body, an exhaust pipe, a generator body, a noise reduction mechanism and a heat energy recycling mechanism, the noise reduction mechanism is arranged on the assembly underframe, and the heat energy recycling mechanism is arranged on the engine body; part of treated hot air is conveniently guided through a hot air guide pipe in the heat energy recycling mechanism, part of the hot air is conveniently guided into a conveying pipe in the noise reduction mechanism through the hot air guide pipe, heat energy is provided for the noise reduction mechanism, and hot air is exhausted through a hot air outlet pipe on a mounting pipe; the driving hot chimney effect enables rising hot air flow to be generated in the installation cavity, a vertical air wall is formed to block noise horizontal transmission, noise generated by a generator set and an exhaust pipe in the mute box is effectively blocked, heat energy in waste gas is recycled, and the energy-saving and environment-friendly effects of the generator set are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of generator sets, and in particular relates to an energy-saving and silent generator set that is easy to assemble. Background Art

[0002] A generator set is a complete system or device that converts other forms of energy into electrical energy. It usually refers to a set of equipment that is driven by a prime mover and is equipped with necessary auxiliary equipment to achieve the power generation function.

[0003] Authorization publication number "CN120140022A" records "a low-noise diesel generator set. It includes: a base; a soundproof box, which is arranged on the base, and a fan, a diesel engine and a generator are arranged on the base. The diesel engine is provided with and connected to an intake manifold and an exhaust pipe. The input shaft of the generator is fixedly connected to a first connecting seat, and the first connecting seat is slidably connected to a uniformly distributed sliding shell. A first spring is provided between the sliding shell and the first connecting seat. The output shaft of the diesel engine is fixedly connected to a second connecting seat, and the second connecting seat is slidably connected to a sliding ring, and the sliding ring is fixed to a uniformly distributed sliding column. The present invention automatically disconnects the connection between the diesel engine and the generator when the diesel engine speed exceeds the rated value, thereby preventing the generator from being affected by excess power, thereby protecting the generator from damage and ensuring the stable operation of the electrical system."

[0004] The above patent effectively avoids the problem of damage to the generator caused by excessive power, but there are some problems in the actual application of the above patent:

[0005] Since the generator set not only generates a lot of noise when in use, but also has noise at its exhaust pipe, the above patent only reduces the noise of the generator set through a soundproof box, and the noise reduction effect is not ideal, and it is difficult to meet the noise reduction needs of the generator set. Summary of the Invention

[0006] The object of the present invention is to provide an energy-saving and silent generator set that is easy to assemble. The present invention aims to solve the problems raised in the background art.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] An energy-saving and silent generator set that is easy to assemble, comprising:

[0009] Assemble the chassis;

[0010] A radiator is arranged on the assembly chassis;

[0011] An engine body is arranged on the assembly chassis;

[0012] an exhaust pipe disposed on the engine body; and

[0013] The generator body is arranged on the assembly chassis;

[0014] Also includes:

[0015] A noise reduction mechanism, disposed on the assembly chassis, for reducing noise; and

[0016] The heat energy recovery and utilization mechanism is arranged on the engine body and is used for heat energy recovery and utilization.

[0017] As a preferred solution of the present invention, the noise reduction mechanism includes:

[0018] Silent boxes; and

[0019] The noise reduction component is arranged on the soundproof box and is used for noise reduction.

[0020] As a preferred solution of the present invention, the mute box is fixedly mounted on the assembly frame, and an installation cavity is provided inside the mute box;

[0021] The noise reduction component includes a delivery pipe, a mounting pipe and a heat-conducting air plate. The delivery pipe is fixedly installed inside the mounting cavity. The mounting pipe is fixedly installed on the bottom wall of the mounting cavity. The outer wall of the mounting pipe is connected to multiple hot air outlet pipes. There are two heat-conducting air plates in total, and each heat-conducting air plate is fixedly connected to the inner wall of the mounting cavity.

[0022] As a preferred solution of the present invention, the inner walls of the installation cavity are fixedly connected with a heat insulation board.

[0023] As a preferred embodiment of the present invention, the heat energy recovery mechanism includes:

[0024] Support frame;

[0025] An exhaust gas treatment assembly is mounted on the support frame and is used for simple exhaust gas treatment; and

[0026] The heat recovery component is arranged on the support frame and is used for heat recovery and utilization.

[0027] As a preferred solution of the present invention, there are two support frames, each of which is fixedly mounted on the inner wall of the soundproof box;

[0028] The exhaust gas treatment assembly includes an exhaust gas treatment pipe, which is installed on two support frames and is connected to one end of the exhaust pipe. A filter and activated carbon are installed inside the exhaust gas treatment pipe.

[0029] The heat recovery component includes a hot air conduit and a heat recovery pipe. The hot air conduit is connected between the exhaust gas treatment pipe and the outer wall of the delivery pipe. The heat recovery pipe is connected to the outer wall of the hot air conduit. A control valve is installed on the outer wall of the hot air conduit.

[0030] As a preferred solution of the present invention, each outer wall of the support frame is fixedly connected to a curved support plate, each top of the curved support plate is hinged with a curved pressure plate, and each curved pressure plate and the outer wall of the curved support plate are correspondingly fixedly connected to a positioning plate.

[0031] As a preferred solution of the present invention, the heat recovery assembly further includes a secondary recovery pipe, which is fixedly mounted on the top of the soundproof box and connects the mounting cavity and the heat recovery pipe.

[0032] As a preferred solution of the present invention, the outer wall of the soundproof box is installed with a door body and a heat dissipation window.

[0033] As a preferred solution of the present invention, a plurality of positioning and adjusting feet are installed on the bottom of the assembly chassis.

[0034] Beneficial effects

[0035] Compared with the prior art, the present invention provides an energy-saving and silent generator set that is easy to assemble, and has the following beneficial effects:

[0036] 1. The present invention processes and recycles the exhaust gas generated by the generator set through a heat recovery mechanism, and introduces the recovered heat energy into the noise reduction mechanism. The noise reduction mechanism drives the thermal chimney effect to generate an ascending hot air flow in the installation cavity of the silent box, forming a vertical "air wall" to block the horizontal propagation of noise, effectively blocking the noise generated by the generator set and the exhaust pipe inside the silent box, and improving the use effect of the noise reduction mechanism.

[0037] 2. In the present invention, the soundproof box is installed on the assembly base and is located outside the generator set to block the noise generated by the generator set. A cavity for installing the noise reduction component is opened inside the box wall around the soundproof box. The noise reduction ability of the soundproof box is improved by the noise reduction component. The noise reduction component uses hot air to be transported to the inside of the installation pipe through the conveying pipe. The installation pipe is located at the bottom of the installation cavity and is arranged in a circular array around the generator set. The hot air is discharged through the hot air outlet pipe on the installation pipe, driving the hot chimney effect to generate an ascending hot air flow inside the installation cavity, forming a vertical "air wall" to block the horizontal propagation of noise, and guiding the exhausted hot air through the heat conduction plate to improve its utilization effect, effectively blocking the noise generated by the generator set and the exhaust pipe inside the soundproof box, thereby improving the use effect of the noise reduction mechanism.

[0038] 3. In the present invention, the heat insulation board surrounds the installation cavity to prevent the internal temperature of the installation cavity from being too high and affecting the normal use of the generator set inside the silent box, thereby improving the safety of the noise reduction mechanism.

[0039] 4. In the present invention, the exhaust gas generated by the operation of the engine body is conveniently treated by the filter and activated carbon inside the exhaust gas treatment pipe, most of the harmful substances in the exhaust gas are removed, and the subsequent recovery and utilization of heat energy in the exhaust gas is convenient. The treated part of the hot gas is conveniently guided through the hot gas conduit, and part of the hot gas is conveniently introduced into the interior of the delivery pipe through the hot gas conduit to provide heat energy for the noise reduction component. By recovering and utilizing the heat energy in the exhaust gas, the energy-saving and environmental protection effect of the generator set is improved. The opening and closing of the hot gas conduit is conveniently controlled by the control valve, thereby improving the use effect of the heat recovery component. Another part of the heat energy is conveniently conducted out for utilization through the heat recovery pipe, further improving the use effect of the heat recovery mechanism.

[0040] 5. In the present invention, the support frame provides stable support for the exhaust gas treatment pipe. The exhaust gas treatment pipe is connected to the exhaust pipe and the hot air duct through a flange. The arc-shaped support plate and the arc-shaped pressure plate cooperate to facilitate clamping and fixing the exhaust gas treatment pipe. The corresponding two positioning plates are locked by bolts and nuts. The positioning plate facilitates the locking of the arc-shaped support plate and the arc-shaped pressure plate, thereby improving its stability in use. At the same time, when the exhaust gas treatment pipe is disassembled and cleaned, it is convenient to lift the exhaust gas treatment pipe to be disassembled. Only the flange nut needs to be removed, and then the bolts and nuts on the positioning plate need to be removed to remove the exhaust gas treatment pipe. No multiple people are required to operate, thereby improving its convenience in installation and disassembly.

[0041] 6. The present invention facilitates secondary recovery of hot air inside the installation cavity through the secondary recovery pipe. The recovered hot air is input into the heat recovery pipe through the secondary recovery pipe for secondary utilization, thereby avoiding waste of heat energy and improving the use effect of the heat recovery component. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a schematic diagram of the present invention;

[0043] Figure 2 A second perspective schematic diagram of the present invention;

[0044] Figure 3 An exploded view of the present invention;

[0045] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0046] Figure 5 For the present invention Figure 3 Enlarged view of point B in the middle;

[0047] Figure 6 For the present invention Figure 3 Schematic diagram of the second perspective;

[0048] Figure 7 For the present invention Figure 6 Enlarged view of point C in the middle;

[0049] Figure 8 For the present invention Figure 6 Partial schematic diagram:

[0050] Figure 9 For the present invention Figure 8 Exploded diagram.

[0051] Description of the numbers in the figure:

[0052] 1. Assembly chassis; 2. Radiator; 3. Engine body; 4. Exhaust pipe; 5. Generator body; 6. Silent box; 7. Noise reduction component; 701. Delivery pipe; 702. Mounting pipe; 703. Heat conduction plate; 704. Hot air outlet pipe; 8. Heat insulation board; 9. Support frame; 10. Exhaust gas treatment component; 1001. Exhaust gas treatment pipe; 1002. Filter; 1003. Activated carbon; 11. Heat recovery component; 1101. Hot air duct; 1102. Heat recovery pipe; 1103. Control valve; 1104. Secondary recovery pipe; 12. Door body; 13. Heat dissipation window; 14. Positioning and adjustment foot; 15. Arc support plate; 16. Arc pressure plate; 17. Positioning plate. DETAILED DESCRIPTION

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0054] Example:

[0055] See also Figure 1-9 , the present invention provides the following technical solutions:

[0056] An energy-saving and silent generator set that is easy to assemble, comprising:

[0057] Assembly chassis 1, radiator 2, engine body 3, exhaust pipe 4, generator body 5, noise reduction mechanism and heat energy recovery mechanism. Specifically, radiator 2, engine body 3 and generator body 5 are all installed on assembly chassis 1, and exhaust pipe 4 is installed on engine body 3.

[0058] In this embodiment, the assembly base 1 is used to install and fix the generator set, facilitating the assembly of the generator set. The radiator 2 is used to dissipate heat from the generator set, providing an ideal working environment for the generator set. The exhaust pipe 4 is used to discharge the exhaust gas generated by the engine body 3.

[0059] See also Figure 1 、 Figure 3 、 Figure 5 、 Figure 6 and Figure 7 A noise reduction mechanism is provided on the assembly chassis 1 for noise reduction. The assembly chassis 1 is composed of a mute box 6 and a noise reduction component 7, which are described in detail as follows:

[0060] The soundproof box 6 is fixedly mounted on the mounting base 1, and a mounting cavity is provided inside the soundproof box 6;

[0061] The noise reduction component 7 is arranged on the soundproof box 6, which is used for noise reduction. Specifically: the noise reduction component 7 includes a delivery pipe 701, an installation pipe 702 and a heat conduction air plate 703. The delivery pipe 701 is fixedly installed inside the installation cavity, the installation pipe 702 is fixedly installed on the bottom wall of the installation cavity, and the outer wall of the installation pipe 702 is connected to multiple hot air outlet pipes 704. There are two heat conduction air plates 703 in total, and each heat conduction air plate 703 is fixedly connected to the inner wall of the installation cavity.

[0062] In the embodiment, the soundproof box 6 is installed on the assembly base 1 and is located outside the generator set to block the noise generated by the generator set. A cavity for installing the noise reduction component 7 is opened inside the box wall around the soundproof box 6. The noise reduction component 7 is used to improve the noise reduction ability of the soundproof box 6. The noise reduction component 6 uses hot air to be transported to the inside of the installation pipe 702 through the conveying pipe 702. The installation pipe 702 is located at the bottom of the installation cavity and is arranged in a ring array around the generator set. The hot air is discharged through the hot air outlet pipe 704 on the installation pipe 702, driving the hot chimney effect to generate an ascending hot air flow inside the installation cavity, forming a vertical "air wall" to block the horizontal propagation of noise. The exhausted hot air is guided by the heat conducting plate 703 to improve its utilization effect, effectively blocking the noise generated by the generator set inside the soundproof box 6 and the exhaust pipe 4, thereby improving the use effect of the noise reduction mechanism.

[0063] See also Figure 3 and Figure 4 , the inner wall of the installation cavity is fixedly connected with a heat insulation board 8.

[0064] In this embodiment, the heat insulation board 8 surrounds the installation cavity to prevent the internal temperature of the installation cavity from being too high and affecting the normal use of the generator set inside the silent box 6, thereby improving the safety of the noise reduction mechanism.

[0065] See also Figure 1 、 Figure 3 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9 A heat recovery mechanism is provided on the engine body 3 for heat recovery. The heat recovery mechanism is composed of a support frame 9, an exhaust gas treatment component 10 and a heat recovery component 11, which are described in detail as follows:

[0066] There are two support frames 9, each of which is fixedly mounted on the inner wall of the soundproof box 6;

[0067] The exhaust gas treatment assembly 10 includes an exhaust gas treatment pipe 1001, which is mounted on two support frames 9 and is connected to one end of the exhaust pipe 4. A filter 1002 and activated carbon 1003 are installed inside the exhaust gas treatment pipe 1001.

[0068] The heat recovery component 11 includes a hot air conduit 1101 and a heat recovery pipe 1102. The hot air conduit 1101 is connected between the exhaust gas treatment pipe 1001 and the outer wall of the delivery pipe 701. The heat recovery pipe 1102 is connected to the outer wall of the hot air conduit 1101. A control valve 1103 is installed on the outer wall of the hot air conduit 1101.

[0069] In this embodiment, the support frame 9 provides a stable support for the exhaust gas treatment pipe 1001, improves the stability of the exhaust gas treatment pipe 1001, and the exhaust gas treatment pipe 1001 is connected to the exhaust pipe 4 through a flange. The filter 1002 and the activated carbon 1003 inside the exhaust gas treatment pipe 1001 facilitate simple treatment of the exhaust gas generated by the engine body 3, remove most of the harmful substances in the exhaust gas, and facilitate the subsequent recovery and utilization of heat energy in the exhaust gas. The hot gas conduit 1101 is connected to the exhaust gas treatment pipe 1001 through a flange. 1 facilitates the guidance of part of the processed hot gas, and facilitates the introduction of part of the hot gas into the interior of the delivery pipe 701 through the hot gas conduit 1101 to provide heat energy for the noise reduction component 7. By recovering and utilizing the heat energy in the exhaust gas, the energy-saving and environmental protection effects of the generator set are improved. The opening and closing of the hot gas conduit 1101 are conveniently controlled by the control valve 1103, thereby improving the use effect of the heat recovery component 11. The remaining part of the heat energy is conveniently conducted out for utilization through the heat recovery pipe 1102, thereby further improving the use effect of the heat recovery mechanism.

[0070] See also Figure 8 and Figure 9 Each support frame 9 is fixedly connected to the outer wall with an arc-shaped support plate 15, and each arc-shaped support plate 15 is hinged on the top with an arc-shaped pressure plate 16. Each arc-shaped pressure plate 16 and the outer wall of the arc-shaped support plate 15 are fixedly connected with a positioning plate 17 accordingly.

[0071] In this embodiment, the arc-shaped support plate 15 and the arc-shaped pressure plate 16 cooperate to facilitate the clamping and fixing of the exhaust gas treatment pipe 1001, and the corresponding two positioning plates 17 are locked by bolts and nuts. The positioning plate 17 facilitates the locking of the arc-shaped support plate 15 and the arc-shaped pressure plate 16, thereby improving its stability in use. At the same time, when the exhaust gas treatment pipe 1001 is disassembled and cleaned, it is convenient to lift the exhaust gas treatment pipe 1001 to be disassembled. It is only necessary to remove the flange nut and then remove the bolts and nuts on the positioning plate 17 to remove the exhaust gas treatment pipe 1001. No multiple people are required to operate, thereby improving its convenience in installation and disassembly.

[0072] See also Figure 6 The heat recovery component 11 also includes a secondary recovery pipe 1104, which is fixedly installed on the top of the silent box 6, and the secondary recovery pipe 1104 communicates with the installation cavity and the heat recovery pipe 1102.

[0073] In this embodiment, the secondary recovery pipe 1104 is connected to the heat recovery pipe 1102 and a valve body (not shown in the figure) is set to facilitate the opening and closing of the secondary recovery pipe 1104. The secondary recovery pipe 1104 facilitates the secondary recovery of the hot air inside the installation cavity. The recovered hot air is input into the heat recovery pipe 1102 through the secondary recovery pipe 1104 for secondary utilization, thereby avoiding waste of heat energy and improving the use effect of the heat recovery component 11.

[0074] See also Figure 2 , the outer wall of the mute box 6 is equipped with a door body 12 and a heat dissipation window 13;

[0075] A plurality of positioning and adjusting feet 14 are installed at the bottom of the assembly chassis 1 .

[0076] In this embodiment, the door 12 facilitates inspection and maintenance of the interior of the silent box 6 and the generator set, the heat dissipation window 13 facilitates heat dissipation of the generator set inside the silent box 6, and the positioning adjustment feet 14 facilitate height adjustment and fixation of the assembly base 1, thereby improving its installation and use stability.

[0077] Working principle: When in use, open the control valve 1103 to connect the hot gas conduit 1101 and the delivery pipe 701. The exhaust gas generated by the engine body 3 enters the exhaust gas treatment pipe 1001 through the exhaust pipe 4. The exhaust gas generated by the engine body 3 is simply treated by the filter 1002 and the activated carbon 1003 inside the exhaust gas treatment pipe 1001 to remove most of the harmful substances in the exhaust gas. The treated hot gas enters the hot gas conduit 1101 and is diverted through the hot gas conduit 1101. Part of the hot gas enters the heat recovery pipe 1101 for recycling, and the other part of the hot gas enters the delivery pipe 701 and is input into the installation pipe 702 from the delivery pipe 701. The hot air is discharged through the hot air outlet pipe 704 on the installation pipe 702, driving the thermal chimney effect to generate an upward hot air flow inside the installation cavity, forming a vertical "air wall" to block the horizontal propagation of noise, and guiding the discharged hot air through the heat-conducting air plate 703 to effectively block the noise generated by the generator set inside the silent box 6 and the exhaust pipe 4. In conjunction with the silent box 6, the internal generator set is subjected to noise reduction treatment, and the heat insulation board 8 surrounds the installation cavity to prevent the internal temperature of the installation cavity from being too high and affecting the normal use of the generator set inside the silent box 6. After use, the rising hot air flow is recovered through the secondary recovery pipe 1104 and introduced into the heat energy recovery pipe 1102 for recycling and reuse.

[0078] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An energy-saving and silent generator set that is easy to assemble, comprising: Assembling the chassis (1); A radiator (2) is arranged on the mounting base (1); An engine body (3) is arranged on the assembly chassis (1); An exhaust pipe (4) is provided on the engine body (3); as well as A generator body (5) is arranged on the assembly base (1); It is characterized by further comprising: A noise reduction mechanism is provided on the assembly chassis (1) and is used to reduce noise; and The heat energy recovery and utilization mechanism is arranged on the engine body (3) and is used for heat energy recovery and utilization.

2. The energy-saving and silent generator set that is easy to assemble according to claim 1, characterized in that: The noise reduction mechanism comprises: a soundproof box (6); and The noise reduction component (7) is arranged on the soundproof box (6) and is used for noise reduction.

3. The energy-saving and silent generator set that is easy to assemble according to claim 2, characterized in that: The mute box (6) is fixedly mounted on the assembly base (1), and a mounting cavity is provided inside the mute box (6); The noise reduction component (7) comprises a delivery pipe (701), a mounting pipe (702) and a heat-conducting air plate (703); the delivery pipe (701) is fixedly mounted inside the mounting cavity; the mounting pipe (702) is fixedly mounted on the bottom wall of the mounting cavity; the outer wall of the mounting pipe (702) is connected to a plurality of hot air outlet pipes (704); there are two heat-conducting air plates (703) in total, and each heat-conducting air plate (703) is fixedly connected to the inner wall of the mounting cavity.

4. The energy-saving and silent generator set that is easy to assemble according to claim 3 is characterized by: The inner walls of the installation cavity are fixedly connected with a heat insulation board (8).

5. The energy-saving and silent generator set that is easy to assemble according to claim 4 is characterized in that: The heat energy recovery and utilization mechanism comprises: Support frame (9); An exhaust gas treatment component (10) is disposed on the support frame (9) and is used for simple treatment of exhaust gas; and The heat energy recovery component (11) is arranged on the support frame (9) and is used for heat energy recovery and utilization.

6. The energy-saving and silent generator set that is easy to assemble according to claim 5, characterized in that: There are two support frames (9) in total, and each support frame (9) is fixedly mounted on the inner wall of the soundproof box (6); The exhaust gas treatment assembly (10) comprises an exhaust gas treatment pipe (1001), the exhaust gas treatment pipe (1001) is mounted on two support frames (9), and the exhaust gas treatment pipe (1001) is connected to one end of the exhaust pipe (4), and a filter (1002) and activated carbon (1003) are installed inside the exhaust gas treatment pipe (1001); The heat recovery assembly (11) comprises a hot air conduit (1101) and a heat recovery pipe (1102). The hot air conduit (1101) is connected between the exhaust gas treatment pipe (1001) and the outer wall of the delivery pipe (701). The heat recovery pipe (1102) is connected to the outer wall of the hot air conduit (1101). A control valve (1103) is installed on the outer wall of the hot air conduit (1101).

7. The energy-saving and silent generator set that is easy to assemble according to claim 6, characterized in that: The outer wall of each support frame (9) is fixedly connected to an arc-shaped support plate (15), the top of each arc-shaped support plate (15) is hinged to an arc-shaped pressure plate (16), and each arc-shaped pressure plate (16) and the outer wall of the arc-shaped support plate (15) are correspondingly fixedly connected to a positioning plate (17).

8. The energy-saving and silent generator set that is easy to assemble according to claim 7, characterized in that: The heat recovery assembly (11) further includes a secondary recovery pipe (1104), which is fixedly mounted on the top of the mute box (6), and the secondary recovery pipe (1104) is connected to the mounting cavity and the heat recovery pipe (1102).

9. The energy-saving and silent generator set that is easy to assemble according to claim 1, characterized in that: The outer wall of the soundproof box (6) is provided with a door body (12) and a heat dissipation window (13).

10. The energy-saving and silent generator set that is easy to assemble according to claim 1, characterized in that: A plurality of positioning and adjusting feet (14) are installed at the bottom of the assembly chassis (1).

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