CN218388801U - Self-suction type bale breaking hay machine - Google Patents

Abstract

The utility model provides a from inhaling broken bundle hay machine of formula of income in farming-grazing industry equipment technical field, but the handing-over of the first mouth department of semicircle feed chute change cylinder is installed the wind valve door that can switch, the rubbing crusher will collect the wind valve door and close when beating the bale and long stalk bale, can concentrate the negative pressure air current, be favorable to the suction of heavy bale and long stalk bale, after automatic suction of the bale of feeding, cut the rope through the broken bundle ware and break and beat through the rubbing crusher; open the air collecting valve when smashing scattered grass, can increase the feed inlet, improve crushing efficiency, not only can make whole bundle of forage or people bundle stock bundle grass by rubbing crusher, but also can smash various scattered grass etc. dry wet grass all can smash, suction is big, labour saving and time saving, it is efficient, the forage grass after smashing is thin and soft, the palatability of livestock is good, it is not extravagant, device simple structure is compact, easily operation, manufacturing cost and technical cost greatly reduced, it is convenient to maintain, have extensive popularization and application and worth in farming-animal-husbandry equipment technical field.

Description

Self-suction type bale breaking hay machine

Technical Field

The utility model relates to a farming-grazing industry equipment technical field, it is specific, the utility model relates to a broken bundle hay machine.

Background

Pasture is the basis for the development of livestock and poultry production, particularly herbivorous livestock production. The pasture grass not only contains various nutrient substances necessary for livestock, but also contains crude fiber which is particularly important for maintaining the health of ruminant livestock, and the crude fiber cannot be replaced by grain and other feeds. After the planted pasture reaches the harvest season, the harvested pasture and crop straw are usually mechanically bundled for ease of transportation and reduced storage space.

However, because the bales cannot be fed directly, the bales need to be crushed by a hay machine before being used, and the conventional hay machine needs to cut and draw out the binding ropes manually before being crushed and then can be put into the hay machine for crushing.

The grass pulverizer for breaking bundles and removing iron and stones disclosed by our company before the application date has the publication number of CN206423176U, and can only break the grass bundles although the grass can be directly broken and broken, and the speed is slow when the grass is broken and scattered, and the grass is required to be pulled and guided by a tool manually and constantly; secondly, the structure is comparatively complicated, and drive mechanism is more, has increased manufacturing cost and technical cost, and finally, because the structure is complicated, the part wearing and tearing are also too much, cause the maintenance height, consequently, need a simple structure from breaking bundle hay machine of income formula of inhaling to solve above-mentioned problem urgently.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the traditional grass pulverizer can be used only by manually cutting off the grass bundling rope in advance, the existing grass pulverizer for breaking bundles and removing iron and stones can directly crush the grass bundles, but the speed is slow when the grass is crushed; the structure is complex, and the manufacturing cost and the technical cost are increased; the utility model aims to provide a self-suction type bale breaking hay machine, which is characterized in that an openable air collecting valve is connected and installed at the front upper half opening of a semicircular feeding groove variable cylinder, the air collecting valve is closed when a crusher beats the bales, negative pressure air flow can be concentrated, the suction of heavy bales and long-stalk hay is facilitated, the fed bales are automatically sucked, and the bales are broken by a bale breaker rope; open the air collecting valve when smashing scattered grass, can increase first feed inlet, because scattered grass is the virtual bubble state, the feed inlet advances the grass volume just also bigger after increaseing, then get into through the second feed inlet and smash the room and smash and rub, through screen cloth or broken segment plate, discharge through circular arc spiral case formula discharge way and discharge gate, not only can smash whole bundle forage, but also can smash various scattered grass, stock bundle grass etc. dry wet grass all can smash, suction is big, labour saving and time saving, high efficiency, the forage grass after smashing is thin and soft, the palatability of livestock is good, it is not extravagant, the design simple and compact structure, easy operation, manufacturing cost and technical cost greatly reduced, it is convenient to maintain, have extensive popularization and application and worth in farming equipment technical field.

The utility model discloses a realize through following technical scheme:

the utility model provides a from inhaling formula bale broken hay machine, including frame, casing, wheel and traction ring, be provided with the grinder in the casing, the casing is fixed to be set up in the frame, and the frame bottom is equipped with the wheel, and the upper left side top of casing is equipped with the upper discharge gate, and casing left lower part side is equipped with the lower discharge gate, and one side that the casing was kept away from to the frame is equipped with the traction ring, be equipped with crushing room in the casing, the grinder sets up in crushing room, the front is equipped with the semicircle feed chute outside the casing, and semicircle feed chute near the downward sloping setting of casing one side, semicircle feed chute upside is equipped with first feed inlet, the first feed inlet outside is equipped with the collection wind valve; the bale breaking device is arranged in the first feed port and comprises a screw cone bale breaking head, a rope cutting knife and a bale breaking device cutter disc, the bale breaking knife and the bale breaking and splitting knife are fixedly installed at the front end of the axle center of the bale breaking device, the bale breaking knife is provided with a plurality of fan-shaped blades which are annularly arranged around the screw cone bale breaking head, the bale breaking knives are fixedly installed on the bale breaking device cutter disc through bolts, a plurality of fixed cutter seats are welded on the bale breaking device cutter disc at equal intervals, the rope cutting knife and the bale breaking and splitting knife are fixedly connected onto the fixed cutter seats through bolts, the bale breaking and splitting knife and the rope cutting knife are arranged at intervals, and the height of the rope cutting knife is higher than that of the bale breaking and splitting knife; a second feed inlet is formed between the bundle breaking device and the smashing device in the machine shell, and a tooth-shaped fixed knife is arranged on the lower side, close to the second feed inlet, in the smashing chamber.

In the utility model, the grinder comprises a cutter disc frame, a rotor shaft, a rotor disc, a movable cutter, a wind blade plate and a blade-clamping flail cutter, wherein the rotor disc is welded with the cutter disc frame into a whole through the wind blade plate and is fixedly connected with the rotor shaft; the cutter disc frame is arranged at one end, close to the bundle breaking device, of the rotor shaft in an annular mode, moving cutters are fixedly connected to the cutter disc frame, a plurality of wind blade plates are arranged in the middle of the rotor shaft in an annular mode, a throwing cutter pin shaft is arranged between the cutter disc frame behind the wind blade plates and the rotor disc, and blade clamping throwing cutters are movably mounted on the throwing cutter pin shaft.

The utility model discloses in, the one end of keeping away from first feed inlet outside the casing is equipped with main shaft belt pulley, rotor shaft one end stretch out the casing in the outer first feed inlet with broken bundle ware fixed connection, the other end stretch out the casing outer with main shaft belt pulley fixed connection, the casing is close to main shaft belt pulley one side and still is equipped with drive belt pulley, main shaft belt pulley passes through the belt and is connected with the drive belt pulley transmission, drive belt pulley's axle center fixedly connected with transmission shaft.

The utility model discloses in, be equipped with the screen cloth track between casing inner wall and the grinder, install removable screen cloth in the screen cloth track, the radius of screen cloth is greater than the radius of activity that presss from both sides sword flail knife.

The utility model discloses in, still be equipped with broken festival board track between screen cloth track and the casing, removable broken festival board is installed to selectivity in the broken festival board track.

The utility model discloses in, be equipped with circular arc spiral case formula row material way between screen cloth track and the casing.

Compared with the prior art, use the utility model provides a pair of from inhaling formula broken bundle hay machine can obtain following beneficial effect:

(1) Through setting up and breaking bundle ware, it is fast to cut the broken bundle of rope, need not the manual work before the grass meal and cuts off the bundle rope on the bale in advance, labour saving and time saving.

(2) Through setting up semicircle feed chute and first feed inlet, can rubbing crusher bale grass bundle, can smash loose grass again, still can smash people bundle stock bale, it can produce powerful suction to drive by the transmission shaft through fan-blade board, rubbing crusher puts into to broken bundle ware promotion on the semicircle feed chute with the bale when bundling bale grass and people bundle stock bale, can inhale automatically and cuts the rope, broken bundle and smashing, but the collection wind valve of switch has been installed to the first feed inlet department on semicircle feed chute upper portion, rubbing crusher closes negative pressure air current in the multiplicable casing of collection wind valve when bundling grass bundle and people bundle stock bale, increase suction, open collection wind valve and can strengthen scattered grass suction volume when smashing scattered grass, the efficiency of whitewashing grass is greatly improved.

(3) Through the sword flail knife that presss from both sides of installation between knife rest dish behind the aerofoil and rotor dish, can cut the festival that is greater than the sieve mesh fast, beat, rub garrulous back, blow off through sieve mesh and circular arc volute formula discharge way through top discharge mouth or lower discharge mouth again, can take out the screen cloth from the screen cloth track when smashing wet grass and insert broken festival board on broken festival board track can break and rub and smash, broken and rubbed garrulous grass directly blows off from the top discharge mouth when using broken festival board, do not pass through circular arc volute formula discharge way, the grass that is whitewashed out is thin soft, the palatability of livestock is good, it is not extravagant, the machine is beaten the bale, the bundle of people's bundle stock bale, scattered grass, dry wet grass etc. all can smash, suction is big, labour saving and time saving, high efficiency, simple structure is compact, the operation maintenance is convenient, have extensive popularization and application and worth in farming equipment technical field.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a front view of the present invention;

fig. 2 is a side view of the present invention;

FIG. 3 is a side view of the utility model in use for crushing bales;

FIG. 4 is a side view showing the use state of the straw bale crushing device of the present invention;

FIG. 5 is a side view showing a state of use of the present invention in crushing grass;

fig. 6 is a front view of the bale breaker of the present invention;

fig. 7 shows a side view of the bale breaker of the present invention;

FIG. 8 is a side view of the shredder of the present invention;

FIG. 9 is a front view of the shredder of the present invention;

fig. 10 is a schematic view showing a three-dimensional structure of the middle blade-clamping flail knife of the present invention;

fig. 11 is a schematic perspective view of a screen according to the present invention;

fig. 12 is a schematic perspective view of a middle joint-breaking plate according to the present invention.

Reference numerals: 1-a rack, 2-a machine shell, 3-wheels, 4-a traction ring, 5-a spiral cone bundling head, 6-an upper discharge port, 7-a lower discharge port, 8-a first feed port, 9-a semicircular feed tank, 10-an air collecting valve, 11-a fixed cutter base, 12-a rope cutter, 13-a bundling device cutter head, 14-a bundle chopping cutter, 15-a bundle chopping cutter, 16-a tooth-shaped fixed cutter, 17-a second feed port, 18-a crushing chamber, 19-a cutter disc frame, 20-a rotor shaft, 21-a rotor disc, 22-a flail cutter pin shaft, 23-a movable cutter, 24-a blade-clamping flail cutter, 25-a wind vane plate, 26-a main shaft belt pulley, 27-a transmission belt pulley, 28-a belt, 29-a transmission shaft, 30-a screen rail, 31-a screen, 32-a cracking plate rail, 33-a cracking plate and 34-an arc volute type discharge channel.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings 1-12, and it is obvious that the described embodiments are some, but not all embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

In the present invention, for the convenience of description, the description of the relative position relationship of each component in a self-suction type bale breaking hay machine is described according to the layout pattern of the attached drawing 1, such as: the positional relationship of up, down, left, right, etc. is determined according to the layout direction of fig. 1.

With reference to fig. 1 to 10, an embodiment of the present invention provides a self-absorption type bale breaking hay machine, which includes a frame 1, a casing 2, wheels 3 and a traction ring 4, wherein a pulverizer is arranged in the casing 2, the frame 1 is fixedly provided with the casing 2, the bottom of the frame 1 is provided with the wheels 3, the top of the upper left side of the casing 2 is provided with an upper discharge port 6, the side of the lower left side of the casing 2 is provided with a lower discharge port 7, one side of the frame 1, which is far away from the casing 2, is provided with the traction ring 4, a pulverizing chamber 18 is arranged in the casing 2, the pulverizer is arranged in the pulverizing chamber 18, a semicircular feed chute 9 is arranged on the front side of the casing 2, one side of the semicircular feed chute 9, which is close to the casing 2, is inclined downwards, a first feed port 8 is arranged on the upper side of the semicircular feed chute 9, and an air collecting valve 10 is arranged outside the first feed port 8; a bale breaker is arranged in the first feed port 8 and comprises a screw cone bale breaking head 5, a rope cutting knife 12, a bale breaker cutterhead 13, a bale breaking chopper 14 and a bale breaking and splitting knife 15, the screw cone bale breaking head 5 is fixedly mounted at the front end of the axle center of the bale breaker, the bale breaking chopper 14 is provided with a plurality of fan-shaped belt-wound screw cone bale breaking heads 5 which are annularly arranged, the bale breaking chopper 14 is fixedly mounted on the bale breaker cutterhead 13 through bolts, a plurality of fixed knife seats 11 are welded on the bale breaker cutterhead 13 at equal intervals, the rope cutting knife 12 and the bale breaking and splitting knife 15 are fixedly connected onto the fixed knife seats 11 through bolts, the bale breaking and splitting knife 15 and the rope cutting knife 12 are arranged at intervals, and the height of the rope cutting knife 12 is higher than that of the bale breaking and splitting knife 15; a second feed port 17 is arranged between the bale breaking device and the crushing device in the shell 2, and a tooth-shaped fixed knife 16 is arranged at the lower side of the crushing chamber 18 close to the second feed port 17.

As shown in fig. 8 and fig. 9, the utility model discloses in, the grinder includes cutter disc frame 19, rotor shaft 20, rotor disc 21, moves sword 23, wind page or leaf board 25 and presss from both sides sword flail 24, rotor disc 21 passes through wind page or leaf board 25 and cutter disc frame 19 welding as an organic whole to with rotor shaft 20 fixed connection, rotor shaft 20 is close to broken bundle ware one end cyclic annular range and has had cutter disc frame 19, a plurality of move the sword 23 of fixedly connected with on the cutter disc frame 19, rotor shaft 20 middle part cyclic range has a plurality of wind page or leaf boards 25, be equipped with flail knife round pin axle 22 between the later cutter disc frame disc 19 of wind page or leaf board 25 and the rotor disc 21, equal movable mounting has the sword flail 24 of pressing from both sides on the flail round pin axle 22.

As shown in fig. 2 to 5, the utility model discloses in, the one end of casing 2 outer keeping away from first feed inlet 8 is equipped with main shaft belt pulley 26, rotor shaft 20 one end is stretched out casing 2 outer in first feed inlet 8 with broken bundle ware fixed connection, middle part and grinder fixed connection, the other end stretch out casing 2 outer with main shaft belt pulley 26 fixed connection, one side that casing 2 outer is close to main shaft belt pulley 26 still is equipped with drive pulley 27, and main shaft belt pulley 26 passes through belt 28 and is connected with drive pulley 27 transmission, drive pulley 27's axle center fixedly connected with transmission shaft 29.

As shown in fig. 2 to 5 and fig. 11, in the utility model, be equipped with screen cloth track 30 between casing 2 inner wall and the grinder, install removable screen cloth 31 in the middle of screen cloth track 30, the radius of screen cloth 31 is greater than the radius of activity of pressing from both sides sword flail 24, and the aperture of screen cloth 31 is all changed as required kibbling thickness becomes, uses the less screen cloth 31 in aperture when needing to smash more carefully.

As shown in fig. 2 to 5 and 12, in the present invention, a segment breaking plate rail 32 is further disposed between the screen rail 30 and the casing 2, a replaceable segment breaking plate 33 is disposed in the segment breaking plate rail 32, and the segment breaking plate 33 is mounted on the segment breaking plate rail 32, so as to crush forage with large humidity.

As shown in fig. 2 to 5, in the present invention, a circular arc volute type discharging channel 34 is provided between the screen track 30 and the casing 2.

The utility model connects the transmission shaft 29 through the power input of the tractor or the motor, the transmission shaft 29 drives the transmission belt pulley 27, the transmission belt pulley 29 drives the main shaft belt pulley 26 to rotate through the belt 28, the main shaft belt pulley 26 drives the rotor shaft 20 to rotate, and the rotor shaft 20 drives the crusher and the bale breaker to rotate; when the crusher crushes the straw bundles or the long-stalk straw bundles, the whole straw bundles are put on the semicircular feeding groove 9 and pushed towards the bale breaker, the straw bundles slide to the bale breaker from the inclined semicircular feeding groove 9, strong suction is generated when the bale breaker and the crusher rotate, the straw bundles can be automatically sucked, when the straw bundles contact the bale breaker, the straw bundles are firstly screwed in by the upper spiral cone bale breaker head 5 of the bale breaker rotating at a high speed, the straw bundles are cut off by the rope cutting knife 12 on the bale breaker while being screwed in and sucked, the straw bundles continuously move towards the bale breaker in the process of rope pulling by a person, the whole straw bundles are crushed and half crushed by the grass chopping knife 15 and the straw chopping knife 14 and then are sucked into the crushing chamber 18 through the second feeding hole 17, the binding ropes of the long-stalk straw bundles are made of crop straws without being pulled out, and the long-stalk is crushed together, when long-rod grass bundles are crushed, thick stalks can be split by the rope cutting knife 12 and the grass splitting knife 15, the split thin stalks can be split again by the grass splitting knife 14, then the long-rod grass bundles or scattered grass enter the crushing chamber 18 through the second feed port 17, the grass bundles, the long-rod grass bundles or the scattered grass enter the crushing chamber 18 and are cut by matching the toothed fixed knife 16 at the second feed port 17 with the moving knife 23 rotating at high speed, the grass enters the crushing chamber 18 and then is sent to the screen 31 through the fan plate 25 on the crusher, the grass larger than the screen holes of the screen 31 is beaten, crushed and kneaded by the blade clamping flail knife 24, passes through the screen 31 and the arc volute type discharge channel 34 and then is discharged from the upper discharge port 6 or the lower discharge port 7, and the crushing effect can be changed by replacing the screen 31 with the screen with different-sized holes; when smashing scattered grass, open collection wind valve 10, can increase the suction capacity of forage, when smashing wet grass, can extract screen cloth 31, can break and rub the smashing after inserting broken segment plate 33 broken segment plate track 32, the thin grass after smashing does not pass through circular arc spiral case formula row material way 34, can directly discharge from top discharge gate 6, the utility model discloses through cutting and beating to forage grass and crop straw a lot of, the material grass after smashing is thin and soft, and the palatability of livestock is good, is difficult for causing the waste when feeding, and dry, wet bale, stock bale or scattered grass all can be smashed, and suction is big, labour saving and time saving, and is efficient, convenient to use, and device simple structure is compact, and easy to operate, manufacturing cost, technical cost and cost of maintenance all greatly reduced has extensive popularization and application and worth in farming-grazing equipment technical field.

The standard parts used in the application document can be purchased from the market, and can be customized according to the description of the specification and the description of the attached drawings, the specific connection mode of each part adopts conventional means such as mature bolts, rivets, welding and the like in the prior art, and machines, parts and equipment adopt conventional models in the prior art.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (6)

1. The utility model provides a from inhaling formula broken bundle meadow grass machine, which comprises a frame (1), casing (2), wheel (3) and traction ring (4), be provided with the grinder in casing (2), casing (2) are fixed to be set up in frame (1), frame (1) bottom is provided with wheel (3), casing (2) upper left side top is equipped with top discharge mouth (6), casing (2) left side lower part side is equipped with bottom discharge mouth (7), one side of keeping away from casing (2) in frame (1) is equipped with traction ring (4), its characterized in that: a crushing chamber (18) is arranged in the machine shell (2), the crusher is arranged in the crushing chamber (18), a semicircular feeding groove (9) is formed in the outer front face of the machine shell (2), one side, close to the machine shell (2), of the semicircular feeding groove (9) is arranged in a downward inclined mode, a first feeding hole (8) is formed in the upper side of the semicircular feeding groove (9), and an air collecting valve (10) is arranged on the outer side of the first feeding hole (8); a bale breaker is arranged in the first feed port (8), the bale breaker comprises a screw cone bale breaking head (5), a rope cutting knife (12), a bale breaker knife disc (13), a bale breaking chopper (14) and a bale breaking and chopping knife (15), the screw cone bale breaking head (5) is fixedly arranged at the front end of the axle center of the bale breaker, the bale breaking chopper (14) is provided with a plurality of fan-shaped and annularly arranged around the screw cone bale breaking head (5), the bale breaking and chopping knives (14) are fixedly arranged on the bale breaking device cutter disc (13) through bolts, a plurality of fixed cutter seats (11) are welded on the bale breaking device cutter disc (13) at equal intervals, the fixed cutter seats (11) are fixedly connected with rope cutting knives (12) and bale breaking and chopping knives (15) through bolts, the bale breaking and chopping knives (15) and the rope cutting knives (12) are arranged at intervals, and the heights of the rope cutting knives (12) are higher than those of the bale breaking and chopping knives (15); a second feed port (17) is formed between the bale breaking device and the smashing device in the machine shell (2), and a tooth-shaped fixed knife (16) is arranged on the lower side, close to the second feed port (17), in the smashing chamber (18).

2. The self-suction type bale breaking hay machine of claim 1, wherein: the pulverizer comprises a cutter disc frame (19), a rotor shaft (20), a rotor disc (21), a movable cutter (23), a wind blade plate (25) and a blade clamping flail cutter (24), wherein the rotor disc (21) is welded with the cutter disc frame (19) into a whole through the wind blade plate (25) and is fixedly connected with the rotor shaft (20); the cutter disc frame (19) is annularly arranged at one end, close to the bundle breaking device, of the rotor shaft (20), a plurality of movable cutters (23) are fixedly connected to the cutter disc frame (19), a plurality of wind blade plates (25) are annularly arranged in the middle of the rotor shaft (20), a flail cutter pin shaft (22) is arranged between the cutter disc frame (19) behind the wind blade plates (25) and the rotor disc (21), and blade clamping flail cutters (24) are movably mounted on the flail cutter pin shaft (22).

3. The self-suction type bale breaking hay machine as defined in claim 2, wherein: the one end of keeping away from first feed inlet (8) outward of casing (2) is equipped with main shaft belt pulley (26), rotor shaft (20) one end stretch out casing (2) external in first feed inlet (8) with broken bundle ware fixed connection, middle part and grinder fixed connection, the other end stretch out casing (2) external with main shaft belt pulley (26) fixed connection, one side that casing (2) are close to main shaft belt pulley (26) outward still is equipped with drive pulley (27), main shaft belt pulley (26) are connected with drive pulley (27) transmission through belt (28), the axle center fixedly connected with transmission shaft (29) of drive pulley (27).

4. A self-suction bale breaker as defined in claim 3, further comprising: be equipped with screen cloth track (30) between casing (2) inner wall and the grinder, install screen cloth (31) in screen cloth track (30), the radius of screen cloth (31) is greater than the activity radius that presss from both sides sword flail knife (24).

5. The self-suction type bale breaking hay machine of claim 4, wherein: a segment breaking plate rail (32) is further arranged between the screen mesh rail (30) and the shell (2), and a segment breaking plate (33) is arranged in the segment breaking plate rail (32).

6. The self-suction type bale breaking hay machine as defined in claim 5, wherein: an arc volute type discharging channel (34) is arranged between the screen track (30) and the shell (2).

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