A cleaning device for a high-speed cleaning vehicle

Abstract

The present invention discloses a cleaning device for a high-speed sweeping vehicle, and relates to the technical field of sweeping vehicles. The "shoveling, sucking and sweeping three-in-one" method of vacuum negative pressure absorption, rear end roller brush cleaning, and multiple sets of side brushes on the high-speed sweeper for segmented cleaning is adopted to effectively solve the problem of cleaning small-volume and large-specific gravity garbage that is difficult to absorb under high-speed driving conditions, and the cleaning cleanliness rate meets the use requirements. The cleaning device includes a nozzle frame; the nozzle frame includes a cover shell, and the space inside the cover shell is divided into a front suction chamber and a rear suction chamber by a bottom plate, and the bottom opening of the bell-mouthed nozzle is connected to the front suction chamber and the rear suction chamber at the same time, and its top opening is connected to a negative pressure source through an air duct; a roller brush assembly is connected to the rear suction chamber. The present invention has a simple and reasonable structure, is easy to use, has stable performance, is safe and reliable, is easy to operate, and is easy to control.

Description

Technical Field

[0001] The invention relates to the technical field of sweepers, and in particular to a high-speed sweeping device. Background Art

[0002] With the rapid growth of the mileage of high-grade roads and urban expressways in my country and the continuous improvement of road service levels, road cleaning and maintenance services are facing higher requirements in terms of speed and safety.

[0003] The basic operating conditions of various cleaning equipment currently in wide use are designed to meet the low-speed cleaning needs of municipal roads and various open spaces. Generally, the traditional operation methods of disc brush cleaning and vacuum adsorption are adopted. The technical characteristics are good cleaning degree but low operating speed (less than 20km / h). Traditional cleaning equipment is gradually also used in cleaning operations of urban expressways and high-grade highways. Its technical defects of low operating speed make it difficult to meet the user's requirements for cleaning quality and operation safety. Because the operating speed of traditional cleaning equipment is low, the open cleaning of high-grade highways and even urban expressways does not meet the requirements of the minimum safe driving speed of the road, and there are serious safety hazards. The management unit can only adopt the management method of "closing the road first, cleaning later, and then unblocking". The entire operation requires a long planning and preparation time, and more safety facilities and auxiliary personnel are required. The investment is large and the return is low, which will inevitably affect the traffic efficiency of the road.

[0004] There is still a blank of similar products with the above performance at home and abroad, and there is a huge and urgent demand in the market. The equipment technology has a high innovative significance and has a wide range of market application value. Therefore, we developed and designed a device with the function of safe high-speed cleaning. The operating speed can reach 60km / h, which can not only meet the regulatory requirements of the minimum safe driving speed of highways, but also meet the requirements of daily road cleaning operations. At the same time, it also saves various costs incurred by advance safety control for cleaning operations; the operating and driving safety of cleaning workers and vehicles has been significantly improved. Summary of the invention

[0005] In view of the above problems, the present invention proposes a cleaning device for a high-speed sweeping vehicle with an operating speed of more than 60 km / h. The cleaning device adopts a "shoveling, suction and sweeping three-in-one" method that combines vacuum negative pressure absorption and rear-end roller brush cleaning with multiple groups of side brushes on the high-speed sweeper for segmented cleaning. It effectively solves the problem of cleaning small and heavy garbage that is difficult to absorb under high-speed driving conditions, and the cleaning cleanliness rate meets the use requirements.

[0006] The technical solution of the present invention is as follows: the cleaning device comprises a nozzle frame 100 and a front caster assembly 50 and a rear caster assembly 30 connected to the front and rear sides of the nozzle frame 100;

[0007] The nozzle frame 100 includes a housing 103, a front plate 105 and a bottom plate 106 fixedly connected to the bottom of the housing, and a left plate 101 and a right plate 102 fixedly connected to the left and right sides of the housing; the space inside the housing 103 is divided into a front suction chamber and a rear suction chamber by the bottom plate 106, and a bell-shaped nozzle 107 with a larger bottom and a smaller top is also fixedly connected to the housing 103, the bottom of the bell-shaped nozzle 107 is connected to the front suction chamber and the rear suction chamber at the same time, and its top is connected to a negative pressure source through an air duct 108;

[0008] The front side of the bottom plate 106 is also provided with a shovel plate 1 rotatably connected under the cover 103, and the shovel plate 1 is connected to the cover 103 through a reset mechanism;

[0009] A roller brush assembly 200 is connected to the rear air suction chamber.

[0010] Furthermore, the bottom plate in the nozzle frame divides the bottom of the bell-mouth nozzle 107 into two areas, front and back, and the area of ​​the front nozzle area is 2.5 times that of the rear nozzle area.

[0011] Furthermore, the nozzle frame 100 is provided with a traction swing arm 20 hinged thereto, and the top end of the traction swing arm 20 is provided with a mounting seat 60 hinged thereto, and the mounting seat 60 is mounted on the chassis of the working vehicle.

[0012] Furthermore, the bottom plate 106 is also fixedly connected with a transition plate 2, and the shovel plate 1 is attached to the front side of the transition plate 2;

[0013] The shovel plate 1 is connected to the cover shell 103 through a reset mechanism, and the reset mechanism includes a connecting plate 4, a connecting rod 5 and a spring 6. The shovel plate 1 is fixedly connected to the connecting plate 4, and the connecting plate 4 is provided with a movable shaft passing through the left plate 101 or the right plate 102. One end of the connecting rod 5 is fixedly connected to the movable shaft, one end of the spring 6 is connected to the left plate 101 or the right plate 102, and the other end of the spring 6 is connected to the connecting rod 5.

[0014] Furthermore, an adjustment plate 10 is provided on the front side of the front plate 105 and is hinged to it through a front hinge 9. An electric push rod 8 is provided between the adjustment plate 10 and the outer wall of the cover 103. The two ends of the electric push rod 8 are respectively hinged to the adjustment plate 10 and the cover 103.

[0015] Furthermore, the rear side of the bottom plate 106 is provided with a slide plate 3 hinged thereto via a rear hinge 11, and the rear portion of the cover shell 103 is also fixedly connected with a transverse scraper 7 located at the rear side of the rear air suction chamber.

[0016] Furthermore, the roller brush assembly 200 includes a roller brush 201, an adjustment bearing 1 202, an adjustment bearing 211 and a roller brush motor 206;

[0017] The adjusting bearing 1 202 and the adjusting bearing 211 are respectively installed on the left plate 101 and the right plate 102 through the side cover plate 210;

[0018] The roller brush 201 is arranged between two side cover plates 210, one end of the roller brush 201 is fixedly connected to a supporting shaft 203, and the other end is fixedly connected to a driving shaft 207; the supporting shaft 203 passes through the adjusting bearing 211, the driving shaft 207 passes through the adjusting bearing 1 202, the roller brush motor 206 is installed on the adjusting bearing 202 through a motor bracket 208, and the output shaft of the roller brush motor 206 is linked with the driving shaft 207.

[0019] Furthermore, the driving shaft 207 is provided with a nut 209 threadedly connected thereto, the supporting shaft 203 is provided with a nut 204 threadedly connected thereto, and the adjusting bearing 1 202 and the adjusting bearing 2 211 are located between the nut 1 209 and the nut 204 .

[0020] The invention is suitable for open cleaning of highways, airports, docks, bridges, tunnels, urban roads, etc. It complies with the regulatory requirements for the minimum safe driving speed of highways and can meet the daily cleaning needs of roads.

[0021] The invention has a simple and reasonable structure, is easy to use, has stable performance, is safe and reliable, is easy to operate and easy to control, and is suitable for high-speed cleaning of roads such as highways. The cleaning speed is greatly improved, the working efficiency is improved, and there is no need to close the road in advance, which reduces the interference to road traffic to a minimum, and greatly reduces the time required for closing the lane and the cost of using equipment and facilities; most importantly, high-speed cleaning greatly improves the safety of equipment users and vehicles, and the device has significant social benefits in terms of comprehensive economy and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of this case;

[0023] Figure 2 It is a side view of the case;

[0024] Figure 3 It is a three-dimensional diagram of this case;

[0025] Figure 4 It is a schematic diagram of the structure at the bottom of this case;

[0026] Figure 5 is a schematic diagram of the roller brush assembly in this case;

[0027] Figure 6 This is a schematic diagram of the nozzle frame in this case. Figure 1 ;

[0028] Figure 7 This is a schematic diagram of the nozzle frame in this case. Figure 2 .

[0029] In the figure, 1 is a shovel plate, 2 is a transition plate, 3 is a slide plate, 4 is a connecting plate, 5 is a connecting rod, 6 is a spring, 7 is a horizontal scraper, 8 is an electric push rod, 9 is a front hinge, 10 is an adjustment plate, 11 is a rear hinge, 100 is a nozzle frame, 101 is a left side plate, 102 is a right side plate, 103 is a cover shell, 104 is a middle plate, 105 is a front plate, 106 is a bottom plate, 107 is a bell-mouth nozzle, and 108 is an air duct;

[0030] 200 is a roller brush assembly, 201 is a roller brush, 202 is an adjusting bearing 1, 203 is a supporting shaft, 204 is a nut 2, 205 is a coupling, 206 is a roller brush motor, 207 is a driving shaft, 208 is a motor bracket, 209 is a nut 1, 210 is a side cover plate, and 211 is an adjusting bearing 2;

[0031] 20 is a traction swing arm, 30 is a rear caster assembly, 40 is a limiting chain, 50 is a front caster assembly, and 60 is a mounting seat. DETAILED DESCRIPTION

[0032] In order to clearly illustrate the technical features of this patent, this patent is elaborated in detail below through a specific implementation method and in combination with its accompanying drawings.

[0033] The present invention Figure 1-7 As shown, the cleaning device includes a nozzle frame 100 and a front caster assembly 50 and a rear caster assembly 30 connected to the front and rear sides of the nozzle frame 100; the front assembly 50 includes a front wheel frame fixedly connected to the front side of the housing 103 and a front caster rotatably connected to the front wheel frame, and the rear caster assembly 30 includes a rear wheel frame fixedly connected to the rear side of the housing 103 and a rear caster rotatably connected to the rear wheel frame. Under the support of the front caster assembly 50 and the rear caster assembly 30, the cleaning device changes with the road surface and plays an overall obstacle avoidance function.

[0034] like Figure 6-7 As shown, the nozzle frame 100 includes a cover shell 103, a front plate 105 and a bottom plate 106 fixedly connected to the bottom of the cover shell, and a left plate 101 and a right plate 102 fixedly connected to the left and right sides of the cover shell. The height of the two side plates of the nozzle frame from the ground is 20 mm, which is more conducive to suction and picking during high-speed operation; the space inside the cover shell 103 is divided into a front suction chamber and a rear suction chamber by the bottom plate 106, and a bell-shaped nozzle 107 with a larger bottom and a smaller top is also fixedly connected to the cover shell 103, and the bottom of the bell-shaped nozzle 107 is connected to the front suction chamber and the rear suction chamber at the same time, and its top is connected to the negative pressure source through the air duct 108;

[0035] The front side of the bottom plate 106 is also provided with a shovel plate 1 rotatably connected under the cover 103, and the shovel plate 1 is connected to the cover 103 through a reset mechanism, so that the shovel plate 1 can reset itself after being forced to rotate;

[0036] The rear suction chamber is connected with a roller brush assembly 200. Two streamlined flat suction nozzles, namely, trumpet-shaped suction nozzles 107, are arranged horizontally on the suction nozzle frame. The streamlined flat suction nozzle has a 20° inclination angle forward and upward. The suction nozzle is a variable cross-section form with a large inlet area and a small outlet area. In this way, the suction force on the garbage will become larger and larger, which is conducive to the garbage entering the suction port smoothly, so that the sucked garbage can enter the garbage bin of the sweeper as soon as possible; the bottom plate in the suction nozzle frame divides the suction nozzle into two front and rear areas. The front suction nozzle area is 2.5 times the area of ​​the rear suction nozzle area. Large garbage can be easily sucked into the garbage bin from the front suction nozzle area, and the missed small garbage can be sucked into the garbage bin from the rear suction nozzle area.

[0037] like Figure 1-4 As shown, the nozzle frame 100 is provided with a traction swing arm 20 hinged thereto, and the top end of the traction swing arm 20 is provided with a mounting seat 60 hinged thereto, and the mounting seat 60 is mounted on the chassis of the working vehicle.

[0038] The outer wall of the traction swing arm 20 is also connected to a limiting chain 40 , and the bottom end of the limiting chain 40 is connected to the front caster assembly 50 or the cover 103 , playing a good limiting role.

[0039] In this way, the entire device can rotate around the traction frame, and with the support of the front and rear casters, it can automatically adapt to changes in the ground, always ensuring that the suction height remains unchanged, ensuring the vacuum degree of suction and the pressure of the roller brush touching the ground, and better meeting the suction effect; the front caster is 20mm in front of the shovel board. When encountering a bumpy road surface, the entire device can be lifted in advance to achieve an overall obstacle avoidance function.

[0040] Therefore, when the sweeper moves forward quickly, it adopts vacuum negative pressure absorption in the front section and roller brush cleaning in the rear section, which is then combined with the segmented cleaning of multiple sets of side brushes originally on the high-speed sweeper to form a "three-in-one shoveling, suction and sweeping" method. It effectively solves the problem of cleaning small and heavy garbage that is difficult to absorb under high-speed driving conditions, and the cleaning cleanliness rate meets the use requirements.

[0041] like Figure 2 , 4As shown in FIGS. 6 and 7 , the bottom plate 106 is also fixedly connected with a transition plate 2, and the shovel plate 1 is attached to the front side of the transition plate 2; the material of the transition plate can be a plastic plate or hard polyvinyl chloride PVC. In extreme cases, when the cleaning device encounters a higher obstacle that exceeds the obstacle avoidance height of the shovel plate, it will cause damage to the cleaning device. At this time, the transition plate is first damaged to ensure that other parts of the cleaning device are intact. The transition plate can be easily replaced, which reduces maintenance time and minimizes economic costs.

[0042] The shovel plate 1 is connected to the cover 103 through a reset mechanism, and the reset mechanism includes a connecting plate 4, a connecting rod 5 and a spring 6. The shovel plate 1 is fixedly connected to the connecting plate 4, and the connecting plate 4 is provided with a movable shaft penetrating the left plate 101 or the right plate 102. One end of the connecting rod 5 is fixedly connected to the movable shaft, and one end of the spring 6 is connected to the left plate 101 or the right plate 102, while the other end of the spring 6 is connected to the connecting rod 5. In this way, the shovel plate fits the ground during normal operation. Under the action of the spring, the shovel plate and the connecting plate are driven by the connecting rod, so that when the shovel plate encounters uneven protrusions, it can successfully avoid obstacles and can quickly recover. The shovel plate is made of wear-resistant material and can fit the ground for a long time without being worn.

[0043] Furthermore, a middle plate 104 is fixedly connected to the front air suction chamber, and the front air suction chamber is divided into two left and right parts by the middle plate 104, and the two front air suction chambers are respectively connected to two bell-shaped suction nozzles;

[0044] Two connecting plates 4 are fixedly connected to both sides of the shovel plate 1 , respectively. A movable shaft of one connecting plate 4 passes through the middle plate 104 , while a movable shaft on the other connecting plate 104 passes through the left plate 101 or the right plate 102 .

[0045] like Figure 3 , 4 As shown, the front side of the front plate 105 is also provided with an adjustment plate 10 hinged thereto through a front hinge 9, and an electric push rod 8 is also provided between the adjustment plate 10 and the outer wall of the housing 103, and the two ends of the electric push rod 8 are respectively hinged to the adjustment plate 10 and the housing 103. Therefore, under the action of the electric push rod 8, the opening size of the adjustment plate 10 can be adjusted to adapt to cleaning under different high and low speed states, and ensure the best cleaning effect.

[0046] In this way, the front suction chamber space formed by the adjustment plate 10 and the shovel plate 1, the front plate 105, the transition plate 2, and the bottom plate 106 ensures that large garbage and easily sucked garbage can be sucked into the trash can. In addition, the size of the front suction chamber space formed by the adjustment plate and the shovel plate, the front plate of the suction nozzle frame, the transition plate, and the bottom plate of the suction nozzle frame can be converted. In the high-speed state, the electric push rod is retracted, the adjustment plate is opened, and the airflow generated by the high speed will have a larger air intake and a greater adsorption force; at a relatively low speed, the electric push rod is extended, and the adjustment plate is lowered to reduce the air intake. Most of the garbage is scooped up by the shovel plate in the front suction chamber and sucked into the trash can along the shovel plate, the transition plate, and the bottom plate of the suction nozzle frame. Different driving speeds have different air intakes.

[0047] like Figure 2 , 4 As shown, the rear side of the bottom plate 106 is also provided with a slide plate 3 hinged thereto by a rear hinge 11, and the tail of the cover 103 is also fixedly connected with a horizontal scraper 7 located at the rear side of the rear suction chamber. The hinged slide plate is attached to the bottom plate of the nozzle frame by gravity, and automatically flips backwards when encountering obstacles, and can automatically avoid obstacles; at the same time, a rear suction chamber is formed between the slide plate, the bottom plate of the nozzle frame, and the roller brush. The fine garbage that is not sucked into the front suction chamber is pushed by the horizontal scraper made of rubber sheet material close to the ground, and when the power device drives the roller brush to rotate, the remaining fine garbage is lifted and thrown into the rear suction chamber and along the slide plate and the bottom plate of the nozzle frame, and is sucked into the trash bin, ensuring that the fine garbage and the garbage stuck to the ground are sucked into the trash bin.

[0048] like Figure 1-5 As shown, the roller brush assembly 200 includes a roller brush 201, an adjustment bearing 1 202, an adjustment bearing 211 and a roller brush motor 206;

[0049] The adjusting bearing 1 202 and the adjusting bearing 211 are respectively installed on the left plate 101 and the right plate 102 through the side cover plate 210;

[0050] The roller brush 201 is arranged between two side cover plates 210, one end of the roller brush 201 is fixedly connected with a support shaft 203, and the other end is fixedly connected with a drive shaft 207; the support shaft 203 passes through the second adjustment bearing 211, the drive shaft 207 passes through the first adjustment bearing 202, the roller brush motor 206 is installed on the adjustment bearing 202 through a motor bracket 208, and the output shaft of the roller brush motor 206 is linked with the drive shaft 207. During actual installation, the output shaft of the roller brush motor 206 can be connected with the drive shaft 207 through a coupling 205, so that the roller brush and the ground contact pressure can be adjusted very conveniently by adjusting the first bearing 202 and the second bearing 211, so as to ensure that the roller brush 201 is parallel to the ground and a certain ground pressure is ensured, and the roller brush motor can also ensure the stable driving of the roller brush rotation movement.

[0051] The above-mentioned adjustable bearing 1 and adjustable bearing 2 are both vertically arranged height-adjustable bearings, and the height-adjustable bearings specifically include bearings, bearing frames, base frames, adjusting screws and two adjusting nuts. The base frame is fixedly connected to the side cover plate, and the bearing frame is slidably arranged in the base frame. The adjusting screw passes through the top beam of the base frame, and the bottom end of the adjusting screw is fixedly connected to the bearing frame. The two adjusting nuts are both connected to the adjusting screw by threads and are located at the upper and lower sides of the top beam. The outer ring of the bearing is fixedly connected to the bearing frame, and the inner ring of the bearing is connected to the drive shaft or the support shaft. The motor bracket 208 mentioned above is fixedly connected to the bearing frame of the adjustable bearing 1. When it is necessary to adjust up and down, loosen the adjusting nut under the top beam and turn the other adjusting nut to make the bearing frame slide up or down in the base frame. After the height is adjusted to the right position, tighten the adjusting nut under the top beam to lock the height of the bearing frame.

[0052] like Figure 5 As shown, the driving shaft 207 is also provided with a nut 209 threadedly connected thereto, and the supporting shaft 203 is also provided with a nut 204 threadedly connected thereto, and the adjusting bearing 1 202 and the adjusting bearing 211 are located between the nut 209 and the nut 204 to ensure that the driving shaft 207 and the supporting shaft 203 will not move axially.

[0053] The invention effectively solves the problem of cleaning small and heavy garbage that is difficult to absorb and clean at high speed, and the cleaning rate meets the use requirements. It breaks through the limitation of the operating speed of traditional road sweepers and has an effective cleaning speed of more than 60km / h, which greatly improves the cleaning efficiency of urban expressways and highways and significantly reduces the use cost.

[0054] There are many specific implementation ways of the present invention. The above is only the preferred implementation mode of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principle of the present invention. These improvements should also be regarded as the protection scope of the present invention.

Claims

1. A cleaning device for a high-speed cleaning vehicle, characterized in that: The cleaning device comprises a nozzle frame (100) and a front caster assembly (50) and a rear caster assembly (30) connected to the front and rear sides of the nozzle frame (100); The suction nozzle frame (100) comprises a housing (103), a front plate (105) and a bottom plate (106) fixedly connected to the bottom of the housing, and a left plate (101) and a right plate (102) fixedly connected to the left and right sides of the housing; the space inside the housing (103) is divided into a front suction chamber and a rear suction chamber by the bottom plate (106); a bell-shaped suction nozzle (107) with a larger bottom and a smaller top is also fixedly connected to the housing (103); the bottom opening of the bell-shaped suction nozzle (107) is connected to both the front suction chamber and the rear suction chamber, and the top opening is connected to a negative pressure source via an air duct (108); a roller brush assembly (200) is connected to the rear suction chamber; The front side of the bottom plate (106) is also provided with a shovel plate (1) rotatably connected under the cover shell (103), and the shovel plate (1) is connected to the cover shell (103) via a reset mechanism; The bottom plate (106) is also fixedly connected to a transition plate (2), and the shovel plate (1) is attached to the front side of the transition plate (2); The bottom plate in the nozzle frame divides the bottom of the bell-mouth nozzle (107) into two areas, front and rear, and the front nozzle area is 2.5 times the area of ​​the rear nozzle area; The front side of the front plate (105) is also provided with an adjustment plate (10) hinged thereto via a front hinge (9); an electric push rod (8) is also provided between the adjustment plate (10) and the outer wall of the housing (103); the two ends of the electric push rod (8) are respectively hinged to the adjustment plate (10) and the housing (103); in a high-speed state, the electric push rod is retracted and the adjustment plate is opened; in a low-speed state, the electric push rod is extended and the adjustment plate is lowered; The shovel plate (1) is connected to the cover shell (103) via a reset mechanism, the reset mechanism comprising a connecting plate (4), a connecting rod (5) and a spring (6), the shovel plate (1) is fixedly connected to the connecting plate (4), the connecting plate (4) is provided with a movable shaft penetrating the left side plate (101) or the right side plate (102), one end of the connecting rod (5) is fixedly connected to the movable shaft, one end of the spring (6) is connected to the left side plate (101) or the right side plate (102), and the other end of the spring (6) is connected to the connecting rod (5).

2. A cleaning device for a high-speed cleaning vehicle according to claim 1, characterized in that: The suction nozzle frame (100) is provided with a traction swing arm (20) hinged thereto, and the top end of the traction swing arm (20) is provided with a mounting seat (60) hinged thereto, and the mounting seat (60) is mounted on the chassis of the working vehicle.

3. A cleaning device for a high-speed cleaning vehicle according to claim 1, characterized in that: The rear side of the bottom plate (106) is also provided with a slide plate (3) hinged thereto via a rear hinge (11), and the rear portion of the cover shell (103) is also fixedly connected to a transverse scraper (7) located at the rear side of the rear air suction chamber.

4. A cleaning device for a high-speed cleaning vehicle according to claim 1, characterized in that: The roller brush assembly (200) comprises a roller brush (201), an adjusting bearing 1 (202), an adjusting bearing 2 (211), and a roller brush motor (206); The first adjusting bearing (202) and the second adjusting bearing (211) are respectively mounted on the left side plate (101) and the right side plate (102) through the side cover plate (210); The roller brush (201) is arranged between two side cover plates (210); one end of the roller brush (201) is fixedly connected to a support shaft (203), and the other end is fixedly connected to a drive shaft (207); the support shaft (203) passes through the second adjustment bearing (211); the drive shaft (207) passes through the first adjustment bearing (202); the roller brush motor (206) is mounted on the first adjustment bearing (202) via a motor bracket (208); and the output shaft of the roller brush motor (206) is linked to the drive shaft (207).

5. A cleaning device for a high-speed cleaning vehicle according to claim 4, characterized in that: The driving shaft (207) is also provided with a nut 1 (209) threadedly connected thereto, and the supporting shaft (203) is also provided with a nut 2 (204) threadedly connected thereto, and the adjusting bearing 1 (202) and the adjusting bearing 2 (211) are located between the nut 1 (209) and the nut 2 (204).

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