Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
  • B60S9/00—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks
  • B60S9/02—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting
  • B60S9/04—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting mechanically
  • B60S9/06—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting mechanically of screw-and-nut type
  • B60S9/08—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting mechanically of screw-and-nut type the screw axis being substantially vertical
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
  • B60S9/00—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks
  • B60S9/22—Means for attaching lifting, supporting, or manoeuvring devices to vehicles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62D—MOTOR VEHICLES; TRAILERS
  • B62D63/00—Motor vehicles or trailers not otherwise provided for
  • B62D63/06—Trailers
  • B62D63/08—Component parts or accessories

Definitions

• the invention relates to a vertical, elongated support to support a parked off-vehicle trailer, consisting of an upper support tube and a telescopically arrangeein sliding inner support and a threaded spindle for moving the inner support relative to the support tube, wherein the threaded spindle engages in a threaded bearing with is firmly connected to the upper end of the inner support.
• telescopic support devices are usually used for this purpose, which are usually mounted in pairs in the front region of the vehicle frame of a semitrailer. They almost always consist of a hollow column tube, from the inside of which a lower part is brought down for parking. Because the lower part is always retracted in practice while driving in the interior of the support tube, it is referred to here briefly as inner support.
• the output shaft of the transmission leads into the outer support tube and carries there a small bevel gear, which is arranged above a corresponding, large bevel gear, which is fastened to the upper end of the threaded spindle.
• the following supporting force course within the supporting device is typical:
• the supporting force is conducted from the depositing surface to the inner support and the threaded bearing welded therein and from there via the threaded spindle to a thrust bearing in a pressure plate, which is welded into the outer support tube. From there, the support force in the outer support tube and continues on the mounting plate on the support tube in the mounting plate on the vehicle frame by means of frictional engagement between the screw connections of both mounting plates.
• the ring gear must be releasably connected to the threaded spindle. This assembly is expensive. All mentioned telescopic support devices are mounted in the same way on the underside of the vehicle:
• the outer support tubes are provided with perforated plates whose rows of holes have identical distances to each other.
• On the vehicle frame mounting plates are welded, match their hole patterns with the perforated plates of the supports. About these two corresponding perforated plates, the support devices can be screwed in the appropriate for a particular vehicle trailer height.
• the disadvantage is that the vehicle manufacturer must produce the mounting plates and attach to the frame of the vehicle trailer.
• these mounting plates are welded to the high-stress zones of the longitudinal beam subjected to bending and thus represent technical notches that can lead to stress cracks especially in the lower chords of the side members in the dynamic vibrations occurring plus bending by loading.
• the support devices are generally supported rearwardly against the vehicle frame.
• the supports are usually under great time pressure, but mainly traversed without load.
• An adjustment of the column height under load is usually only required when a towing vehicle must be coupled, the fifth wheel is arranged at a different height above the Absteil Structure than the previous, parked towing vehicle and having no air suspension, with the height of the fifth wheel can be changed over the roadway. Therefore, usual supports with a two-speed manual transmission - a load and a high speed gear - equipped to drive the spindle.
• the invention has the task of eliminating the aforementioned disadvantages and in particular to reduce the height of the vertical support and to reduce the weight, the cost of materials, manufacturing costs and installation costs.
• Frame side member are possible.
• the invention teaches that the upper end of the threaded spindle is connected to a ring gear whose upwardly facing surface is part of a thrust bearing or is formed to receive a thrust bearing, wherein the thrust bearing is supported on the vehicle trailer, either directly or through a lid which is connected to the column tube.
• the essential idea of the invention is thus to integrate the thrust bearing for deriving the weight of the vehicle into a plate-shaped wheel for driving the threaded spindle.
• This ring gear then works in a dual function:
• the ring gear takes on a toothing or by a friction surface on a tangentially acting driving force and converts this driving force into a torque that is forwarded to the threaded spindle, which raises or lowers the inner support welded thereto via a threaded bearing ,
• the upper surface of the ring gear forms the lower part of a thrust bearing or takes on a separate thrust bearing, via which the weight of the vehicle is introduced directly into the threaded spindle.
• the advantageous effect of the ring gear according to the invention with integrated thrust bearing is the course of the support force within the support of the inner support via the threaded bearing mounted therein on the threaded spindle on the ring gear and from there via the cover on the support tube in the vehicle frame or alternatively directly into the vehicle frame ,
• the ring gear will have in practice for the additional acquisition of the supporting force usually sufficient load reserves, since it must be designed for the transmission of torque when lifting the maximum loaded trailer.
• a task-specific reduction of the overall height and the system weight of the support is achieved inter alia by eliminating the usual support plate.
• the two functions of a crown gear according to the invention as
• Drive for the threaded spindle and as a carrier of the weight of the vehicle trailer can be performed in different variants for the drive and for the thrust bearing.
• this thrust bearing rests directly on a surface on the underside of the vehicle.
• a lid is inserted, which covers the outer support tube upwards.
• This cover should then preferably be designed on its underside as well as the upper surface of the ring gear.
• the - relatively high-loaded - thrust bearing is designed as a sliding bearing, since a movement of the spindle under maximum load in the current practice is very rare.
• the invention favors, as thrust bearing a deep groove ball bearing.
• a circular running groove is formed in both the upwardly facing surface of the ring gear and in the downwardly facing surface of the lid, in which roll some balls.
• An alternative to this is a tapered roller bearing. Ball or tapered roller bearings reduce the friction compared to plain bearings, which is preferable in the arrangement on the load side - here above the bevel gear.
• an embodiment of the thrust bearing with a single ball is applicable.
• This ball moves in a respective central recess in the upwardly facing surface of the ring gear and in the downwardly facing surface of the lid.
• state-of-the-art ball bearings produce balls with a very high hardness at a relatively low cost
• the contact surface of the ball in the ring gear and in the cover can be kept very small.
• a relatively robust slide bearing is formed above and below the ball.
• As a drive of the ring gear at the upper end of the threaded spindle at least a small bevel gear is suitable in a first alternative, which is aligned perpendicular to the large ring gear.
• the ring gear must be provided with a complementary toothing, which is designed as a large bevel gear.
• the key advance of the invention is that no additional space for the bevel gears is required because the bevel gears - or the bevel gear - below the ring gear
• the ring gear additionally assumes the function of the previously customary separate support plate.
• the small bevel gears - or the small bevel gear - are below the crown wheel, whereby eliminates the required in the prior art upper portion of the fully retracted inner support.
• bevel gear and upper end of the retracted inner support overlap.
• the inner support projects even beyond the small bevel gear directly to the bottom of the ring gear or, if present, to the axial guide. As a result, the overall height of the support according to the invention is further reduced.
• a structurally very simple alternative to the drive of the ring gear by a bevel gear is a friction wheel, which presses on a complementary shaped surface on the circumference of the ring gear.
• a toothing is integrally formed on the front edge of the ring gear, in which engages a spur gear which projects from the outside through a slot in the interior of the support tube inside.
• This spur gear must be rotatably mounted and driven on the outside of the support tube. Because in this embodiment in the interior of the support tube neither above nor below the crown gear drive elements are required, so that a particularly low-building support is possible.
• a crank is attached directly to the shaft of the screw.
• the other end of this shaft can be extended up to the drive worm of an adjacent, second support. This support is driven in the same direction, so it can be made identical to the first support.
• the teeth on the front edge of the ring gear and the spur gear are shaped complementary to a chain or a toothed belt or a ball chain. Furthermore, the teeth of the two wheels are spaced apart and are connected to each other only by the chain or the belt. Since the chain or the belt partially wrap around the outer spur gear and the ring gear inside the support tube, a plurality of teeth are engaged at the same time. Therefore, the teeth of the ring gear and the driving chain or pulley can be made extremely narrow, which further reduces the height and weight of the support.
• any type of drive act on the edge of the ring gear tangentially directed forces. In order for these forces can be converted by the ring gear in a torque that is transmitted to the threaded spindle, a radial support above or below the ring gear is required at the upper end of the spindle.
• Function of the radial guide preferably take over the balls which are embedded in the raceways of the bevel gear and the lid or the centrally arranged ball, which is also sufficiently deep recessed in crown gear and cover.
• the threaded spindle is guided at its upper part by a radial bearing, which is arranged between the axially leading support plate and the lower collar of the ring gear or the threaded spindle.
• a radial bearing which is arranged between the axially leading support plate and the lower collar of the ring gear or the threaded spindle.
• the second, lower bearing of the threaded spindle serves the threaded bearing.
• the inner support is retracted or extended. This is for the assembly of ring gear
• Threaded spindle, threaded bearing and inner support a support in the longitudinal direction of the support - ie in the axial direction - required.
• This function can be achieved with different constructions. If the ring gear is driven on its underside by at least one bevel gear, an additional support in the axial direction of the spindle is unnecessary, because the ring gear is forcibly guided in the vertical direction between the thrust bearing on its upper side and the bevel gears on its underside. However, if the bevel gears are not to be constantly loaded by the weight of the inner support, an axial guide below the
• an axial guidance is essential.
• the invention prefers that the axial guide is arranged below the toothing and fixed in or on the support tube. Through an opening in the axial guide, the threaded spindle extends.
• a downwardly facing shoulder, a shoulder or a recess on the ring gear or at the upper end of the threaded spindle and a complementary, about the opening in the axial guide running around profile form an axial sliding bearing.
• All variants of the drive from the ring gear include a first gear ratio, because the ring gear expediently has a larger diameter than the driving wheel. This reduces the torque required to lift the vehicle trailer. With a further gear ratio, an overdrive gear or a load gear can be activated.
• the invention proposes a transmission gear with a chain.
• several teeth are always engaged, so that the sprockets can be very narrow. This makes them easier and less expensive in terms of the task.
• Particularly attractive is the use of standard parts from others
• the worm wheel or a bevel gear - which engages in the ring gear - to be mounted on a main shaft mounted in the support tube.
• a first sprocket is placed, which is connected via a chain or a belt with a second sprocket which is rotatably mounted on an auxiliary shaft.
• the gear ratio is reduced. This is useful, for example, when the crown gear is driven by a worm wheel as an "overdrive" in unloaded operation.
• the ring gear is driven by a straight bevel gear, it may also be appropriate that the second sprocket of the chain transmission has a smaller diameter than the first sprocket. As a result, the required torque is reduced when lifting the fully loaded trailer.
• Such a chain transmission can be extended in a very simple manner to a two-speed transmission that engages the drive torque either on the main shaft or on the auxiliary shaft.
• Such a transmission can optionally be aligned so that it projects beyond the lower edge of the frame upwards. It is then arranged laterally next to the frame side member. If the support tube is completed with a lid and this cover is extended beyond the edge of the support tube out to a free leg and angled, then it can be attached to the transmission and an auxiliary shaft are stored.
• a support according to the invention can in principle be mounted at any point on the underside of a vehicle trailer. Because the inventive construction of the drive of the threaded spindle by a ring gear with integrated thrust bearing allows a hitherto unknown, extremely low height, it is possible to construct columns of so low height that they are in currently conventional semi-trailers with wheels on rims of 22.5 Inch diameter can be installed below the frame side member.
• the ring gear according to the invention reduces a retracted support even further.
• vehicle trailers whose wheel diameter is about 100 cm - e.g. For 19.5-inch tires or 22.5-inch low-profile tires - and a height of the lower flange of the vehicle frame of about 78 cm above the Absteil pattern the support under a frame side member is possible, with a safe ground clearance and sufficient Hubreserve is still guaranteed.
• the hitherto required, elaborate attachment of the supports can be saved laterally to the frame side members including welding and screwing to the two additional complementary mounting plates to be produced.
• the invention prefers a retaining clip which detachably connects the supporting device to the lower flange of the longitudinal frame member.
• a retaining clip which detachably connects the supporting device to the lower flange of the longitudinal frame member.
• U-shaped retaining clips are molded or attached to the lid or to the outer column tube, they enclose the lower flange.
• the free leg of the U-shaped retaining clips is suitable for mounting a clamp, which presses from there to the lower flange and secures the entire support.
• a corrosion protection plate eg made of zinc sheet - between the lower flange and the cover and to provide the ends of the clamping screws, for example, with rotatable and anti-corrosive pressure plates.
• a similar retaining clip with a clamp attachment can also be used to attach additional, diagonally oriented support profiles to the bottom straps.
• the support bracket of the support can be extended so far that it carries with the diagonal support profiles. As a result, the number of retaining clips and clamps can be reduced.
• gusset plates between the outer support tube and the retaining clip.
• the design with gusset plates is particularly suitable for mounting in the front part of the usual profiles of vehicle frame, the profile height decreases immediately before the support in the direction of the fifth wheel of the vehicle trailer.
• a necessary sub-function for a support according to the invention is a limitation of the possible vertical movement of
• the invention places two guide sleeves between the inner support and the support tube.
• the upper guide sleeve is attached to the outside of the inner support near its upper end and can slide along the inner surface of the column tube.
• the lower guide sleeve is fixed on the inside of the support tube near its lower end - preferably releasably - and can slide on the outer surfaces of the inner support.
• the support tube and the inner support do not slide directly on each other, but are performed against each other only by the two guide sleeves.
• the lower guide sleeve is then mounted to the lower end of the support tube and attached thereto, after the inner support with the fixed guide sleeve at its upper end in the
• the thread on the threaded spindle then only has to be so long that it extends into the threaded bearing.
• the minimum overlap between the inner support and the support tube required for a sufficient buckling strength of the support is achieved when the sum of the height of the two
• Guide sleeves about as large as the width of the inner support.
• the guide profiles reinforce the ends of the inner support and the support tube, which are particularly stressed in the extended state by possibly impinging lateral forces.
• the axes of the two driving wheels can be connected to a continuous shaft.
• one of the two free shaft ends e.g. a hand crank or a shiftable gear set.
• a straight toothed bevel gear is provided as an alternative to the drive of the two ring gears, the axes of these two bevel gears can not be connected to one another, because the bevel gears are arranged below the ring gears, so that the extension of the axes of the bevel gears crosses the threaded spindle.
• the invention prefers that on the opposite side of the threaded spindle, a second bevel gear is arranged, which is driven by the ring gear.
• This second bevel gear is connected via a shaft with another bevel gear, which drives the ring gear in the second support. It should be noted that the second driven bevel gear within the first post rotates in the opposite direction with respect to the first driving bevel gear.
• the first threaded spindle has a right-hand thread, the second a left-hand thread or vice versa.
• the invention proposes that the shaft for connecting the second bevel gear with the other bevel gear in the adjacent support is divided into two half-waves, the ends overlap, however, and are each completed with a spur gear with the opposite spur gear on the another half-wave is engaged. This inverts the direction of rotation. The resulting slight angular misalignment can be compensated for by flexible half-waves or an "oblique" arrangement of the half-waves.
• Another alternative is a laterally mounted next to the columns connecting shaft, which is connected at both ends via chains or spur gears with the respective main shafts so that the same direction of rotation is achieved in the threaded spindles of the two supports.
• Differential gear similar to motor vehicles between the drive wheels of an axle Preferably, the first half-wave extended and the second shortened so far that the gear housing is attached to the second support.
• the three bevel gears in this differential gear cause the threaded spindles of both supports to move in the same direction of rotation.
• the invention proposes that the two threaded spindles in the adjacent supports are connected by a chain or a toothed belt or a ball chain and can thereby be jointly rotated.
• the chain or the toothed belt or the ball chain must intervene for this purpose in two complementary gears in each support.
• An arrangement of these gears on both wheels is a particularly simple alternative. In each support then only two openings are required, through which the chain or the belt is passed.
• Worm wheels or bevel gears or auxiliary wheels which are connected to the last three wheels attached attached.
• the two auxiliary wheels are connected outside of the two supports with the chain or with the belt.
• an apparatus for tensioning the chain or belt increases operational safety. Similarly, sheathing the chain or belt by keeping contaminants out significantly increases the life.
• Figure 1 Vertical section through support and vehicle trailer with drive of the ring gear by bevel gear
• Figure 2 vertical section through support as in Figure 1, but with
• FIG. 1 shows a vertical section through the support (2) and the vehicle trailer (1).
• the section runs through the central axis of the threaded spindle (3) and shows of the support (2) only the upper part with two bevel gears (41) for driving the ring gear (32) and as an output for moving a second - not shown here support (2 ).
• From the trailer (1) only the section through a loading area is shown and below the section through the frame side member (11) with an H-shaped profile whose lower portion - the lower flange (12) - rests on the support (2). Namely, the lower flange (12) rests on the lid (23).
• This cover (23) is the part of the support (2), which closes the - top - support tube (21) upwards.
• the lid (23) has on its downwardly facing surface, the most important feature of the invention, namely the upper part of an integrated thrust bearing (33) consisting of a bearing plate (34), in which the annular tread for a plurality of balls (35) embedded is. Of this tread only the two arcuate indentations in the lower edge of the bearing plate (34) are visible in Figure 1.
• the upwardly facing surface of the ring gear (32) is arranged.
• an annular tread for the balls (35) is embedded. Also of this tread are in Figure 1, only the two bulges in the Top edge of the ring gear (32) visible.
• the two aforementioned running surfaces are each a part of the axial bearing (33), which is designed here as a deep groove ball bearing.
• FIG. 1 is very easy to understand how all vertically oriented forces or force components from the vehicle trailer (1) via the frame side member (11) and the lower flange (12) in the axial bearing (33) are derived.
• the upper part of the thrust bearing (33) is the bearing plate (34) in the cover (23), the lower part of the thrust bearing (33) is the ring gear (32) which is fitted with a large center hole on the head of the threaded spindle (3) and thereby the force in the threaded spindle (3) continues.
• the threaded spindle (3) is screwed into the complementary thread of the threaded bearing (31), which is fixedly connected to the upper end of the inner support (22), preferably welded.
• FIG. 1 shows that all vertical forces are transmitted from the ring gear (32) via the threaded spindle (3) and the threaded bearing (31) into the inner support (22) without loading the outer support tube (21).
• FIG. 1 presents the decisive inventive achievement, namely having integrated the thrust bearing (33) in the ring gear (32) and the cover (23). Because the lower part of the thrust bearing (33) is a part of the ring gear (32) and because the bearing plate (34) within the Cover (23) is the upper part of the thrust bearing (33), claims the thrust bearing (33) at all no share of the total height of the support (2). Or - in another formulation - thanks to the inventive integration of the thrust bearing (33) in the - anyway required - ring gear (32) and the cover (23) eliminates the height required for the usual supports for the thrust bearing (33).
• the cover (23) is extended beyond the edge of the support tube (21) and angled up near the edge of the lower flange (12) for a first time and angled a second time at a distance from the lower flange (12).
• the extension of the cover (23) projects with its free leg (231) into the profile of the frame longitudinal member (11) and thus forms a retaining clip which surrounds the lower flange (12) in a U-shape.
• Figure 1 shows how in the free leg (231) a clamping fixture (5) is inserted, which is supported on the upwardly facing surface of the lower flange (12).
• the clamp (5) is executed in Figure 1 as a screw which is inserted through a hole in the free leg (231) and screwed in the clamping position with a nut and a lock nut on the free leg (231).
• a widened and preferably with respect to the screw rotatable pressure plate (51) at the foot of the screw protects the surface coating of the frame side member (11).
• a corrosion protection plate (52) - eg zinc plate - inserted to prevent paint damage to the lower flange (12) of the vehicle frame (11).
• the second, essential function of the threaded spindle (3) is the lifting of the inner support (22).
• the threaded spindle (3) is set in rotation, which is shown in Figure 1 by an annular double arrow at the bottom of the picture.
• the external thread of the threaded spindle (3) engages in the complementary internal thread of the threaded bearing (31) and moves it - with a corresponding direction of rotation - upwards.
• the inner support (22) attached to the threaded bearing (31) is also lifted upwards.
• Figure 1 shows a very slim axial guide (25) made of pressed sheet metal.
• the compound of the axial guide (25) with the support tube (21) is not visible in cross-section, because for the two bevel gears (41) cutouts in the axial guide (25) are incorporated.
• the axial guide (25) is therefore connected only to parts of its circumference with the interior of the support tube (21), e.g. by means of detachable screw connections, which is sufficient for their relatively low load.
• Figure 1 illustrates impressively that the axial guide (25) in the direction of the vertical longitudinal axis of the support (2) claimed no additional space, but in the space for the bevel gears (41) anyway required space is housed.
• Each end of a main shaft (42) are arranged, which are rotatably mounted in a respective bushing (24) on the outside of the support tube (21).
• the first of these bevel gears (41), the first main shaft (42) and the first bearing bush (24) are required in any case to drive the ring gear (32).
• the second bevel gear (41), the second main shaft (42) and the second bearing bushing (24) are only required when the trailer (1) a second - not shown in Figure 1 - support (2) is fixed, which of the first support (2) to be driven with.
• the second main shaft (42) then serves as an output shaft.
• One of the two bevel gears (41) serves as a drive of the ring gear (32).
• a hand crank (not shown here) or a transmission with a hand crank is attached to the square of its main shaft (42).
• the first bevel gear (41) is set in rotation and drives the ring gear (32).
• the Ring gear (32) not only puts the threaded spindle (3) in rotation but also the second bevel gear (41).
• On the square at the end of the second main shaft (42) should be with a square socket as
• Figure 1 shows with the upper guide sleeve (26) between the outer support tube (21) and the inner support (22) a part of an interesting embodiment for limiting the vertical
• the upper guide sleeve (26) is welded to the outside of the inner support (22), slides on the inside of the support tube (21) and works to limit the stroke with a - not visible here - lower guide sleeve of the same diameter together, which also between the outer support tube (21) and the inner support (22) is arranged, but only on the outer support tube (21) - preferably - releasably secured. In FIG. 1, therefore, it is not visible, but at least comprehensible, that when the inner support (22) moves downwards, the upper guide sleeve (26) also moves downwards. As soon as the upper guide sleeve (26) strikes the lower guide sleeve (not visible in FIG. 1) and the front edges of both guide sleeves lie on top of each other, a further, vertical movement of the inner support is blocked. This prevents the inner support (22) from being pushed downwards out of the outer support tube
• Threaded spindle (3) no additional limitation must be attached, which would increase the overall length of the support (2) and the
• Figure 2 shows a vertical section through a support (2) as in Figure 1, but which is shown in perspective and is additionally equipped with a chain transmission (44,45,46) for two different drive ratios.
• the chain transmission consists of a first, small sprocket (44) and a second, large sprocket (45), which are connected to each other via the chain (46) - of which only the rear half is drawn in Figure 2.
• the first sprocket (44) is rotatably mounted on the main shaft (42).
• For the attachment and storage of the second sprocket (45) of the lid (23) is used, which is extended at its right edge to a free leg (231) and angled twice.
• a bearing block On the leg (231) a bearing block is fixed, in which an auxiliary shaft (43) is rotatably mounted, which carries the second sprocket (45).
• the free ends of the main shaft (42) and the auxiliary shaft (43) are each shaped as a square. Both square edges have the same profile, so that a hand crank can be selectively attached to one of the four-edge.
• Main shaft (42) is fitted, it turns over the bevel gear (41) and the ring gear (32), the threaded spindle (3), which extends and retracts the inner support (22).
• the ratio between the bevel gear (41) and the ring gear (32) and the pitch of the threaded spindle (3) are designed so that with the torque of the hand crank even with a fully loaded vehicle trailer (1) whose fifth wheel height to the height of the coupling plate on the Tractor can be adapted.
• This mode is the "load gear”.
• each still another sprocket is arranged with a different diameter.
• the two additional sprockets are connected by another chain.
• the two lower sprockets are each rotatably mounted on the main shaft (42).
• the two upper sprockets are rotatably mounted on the auxiliary shaft (43).
• An axially displaceable on the auxiliary shaft (43) sleeve serves as a coupling between one of the two upper sprockets and a crank. By moving the sleeve is changed between "load gear” and "overdrive”. In both modes, the hand crank is connected to the auxiliary shaft (43).
• Figure 2 shows that the axial guide (25) of two recesses is broken through which the two bevel gears (41) protrude through.
• the axial guide (25) has a sufficiently large, side-facing surface to be securely connected to the support tube (21). Due to this shape, the axial guide (25) does not require additional height of the support (2).
• FIG. 2 shows an embodiment of the threaded bearing (31) as a forged or cast part. At the outer edges of a circumferential web is formed, from which four smaller webs to the center and there carry the molded threaded nut whose internal thread is complementary to the threaded spindle (3). Despite the low weight of the threaded bearing (31), it is relatively high load capacity.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Transportation (AREA)
• Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)

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• 2013
  • 2013-12-24 DE DE102013022132.3A patent/DE102013022132A1/de not_active Withdrawn
• 2014
  • 2014-12-19 WO PCT/DE2014/000645 patent/WO2015096828A1/de active Application Filing
  • 2014-12-19 CN CN201480070517.6A patent/CN105848972B/zh not_active Expired - Fee Related
  • 2014-12-19 US US15/107,259 patent/US9840235B2/en not_active Expired - Fee Related
  • 2014-12-19 EP EP14841406.3A patent/EP3105090A1/de not_active Withdrawn
  • 2014-12-19 DE DE112014005876.9T patent/DE112014005876A5/de not_active Withdrawn

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