Abstract
The invention relates to a lifting gear having a flexible drive and a traction drive movable by the flexible drive. The flexible drive can be actuated by a lever arm arranged to pivot, and in the region of the free end of the lever arm, a handle is connected to the lever arm by an articulated joint. The handle can be pivoted from a starting position into an operating position.
Claims
1. A lifting gear, comprising: a traction drive, a lever arm, wherein the traction drive is actuated by the lever arm arranged such that the lever arm is swivelable, a handle, wherein the handle is connected to the lever arm at a free end of the lever arm by an articulated joint, wherein the handle is swivelable from a starting position to an operating position, and wherein the lever arm has a recess open to both opposite surfaces of the lever arm, and the handle in the starting position is fully incorporated into the recess of the lever arm.
2. The lifting gear as claimed in claim 1, wherein the handle is movable about a swivel axis of the articulated joint, and the articulated joint is disposed at an angle to a longitudinal axis of the lever arm.
3. The lifting gear as claimed in claim 1, further comprising: an interior spring, wherein the handle is a hollow grip body secured by the interior spring at least indirectly with respect to the articulated joint.
4. The lifting gear as claimed in claim 3, further comprising: a coupling element, and a sleeve, wherein the grip body is connected by the sleeve to the coupling element, and wherein the sleeve is displaceable along the coupling element.
5. The lifting gear as claimed in claim 4, wherein the articulated joint comprises a bearing body and a fixation element, and wherein the fixation element extends through the bearing body and the coupling element and produces a swiveling connection between the bearing body and the coupling element.
6. The lifting gear as claimed in claim 4, wherein the spring is arranged inside the grip body between the sleeve and an abutment, while the spring presses the sleeve against the bearing body of the articulated joint.
7. The lifting gear as claimed in claim 5, wherein the bearing body has a cavity which accommodates the sleeve when the sleeve is pressed by the spring, and the spring is held in the cavity by a centering shoulder in the operating position, to produce a releasable force locking and/or a form fit connection.
8. The lifting gear as claimed in claim 6, further comprising: a closure body, wherein a free end of the grip body has an opening, which receives the closure body.
9. The lifting gear as claimed in claim 4, wherein the sleeve has a centering shoulder.
10. The lifting gear as claimed in claim 1, wherein the lifting gear is a lever hoist.
11. The lifting gear as claimed in claim 1, further comprising: a chain, a rope, or a wire movable by said traction device.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) For an understanding of embodiments of the disclosure, reference is now made to the following description taken in conjunction with the accompanying drawings, in which:
(2) FIG. 1 is a perspective view of the lifting gear according to one exemplary embodiment, in which the handle is in the starting position;
(3) FIG. 2 is a perspective view of the lifting gear according to one exemplary embodiment, in which the handle is swiveled into a first operating position;
(4) FIG. 3 is a perspective view of the lifting gear according to one exemplary embodiment, in which the handle is swiveled into a second operating position;
(5) FIG. 4 is a cross section through the x-z plane of the free end of the lever arm, looking in the direction of the arrow IV of FIG. 1, where the handle is arranged in its starting position;
(6) FIG. 5 is a cross section through the x-y plane of the free end of the lever arm, looking in the direction of the arrow V of FIG. 1, where the handle is arranged in a starting position;
(7) FIG. 6 is a cross section through the x-y plane of the free end of the lever arm, looking in the direction of the arrow VI of FIG. 2, where the handle is swiveled into the first operating position; and,
(8) FIG. 7 is a cross section through the x-y plane of the free end of the lever arm, looking in the direction of the arrow VII of FIG. 3, where the handle is swiveled into the second operating position.
(9) In the figures, the same or like components are designated by the same reference signs, even if a repeated description of said components is dispensed with for reasons of simplicity.
DETAILED DESCRIPTION OF SOME EMBODIMENTS
(10) Some embodiments will be now described with reference to the Figures.
(11) In FIGS. 1, 2 and 3, a variant embodiment of the lifting gear 1 according to the invention is denoted by 1. The lifting gear 1 comprises an upper fastening element 2 as well as a lower abutment element 3, which are joined together at least indirectly by a housing 4. The housing 4 in the present variant embodiment comprises two plates 5, 6 and a frame 7. Inside the housing 4 there is arranged a traction drive 8, by which a traction means, not otherwise represented, can be moved. The lower abutment element 3 is arranged on this traction means, and can be moved with the traction means.
(12) The lever arm 9 is connected by a hand wheel 10 to a shaft and a gearing arrangement, not represented. By the gearing arrangement, the swiveling movement of the lever arm 9 is converted into a rotational movement of the traction drive 8, by which the traction means is moved. The lever arm 9 has a recess 12 at its free end 11. A handle 13 is located inside the recess 12 in a starting position 14 and is coupled by an articulated joint 15 to the lever arm 9. Furthermore, an adjustment unit 16 is arranged on the lever arm 9, being able to adjust the freewheeling direction of the lever arm 9.
(13) The handle 13 in a starting position 14 is received between two webs S1, S2 of the lever arm. The webs S1, S2 enclose the recess 12 on two sides.
(14) FIG. 2 shows that the handle 13 is in a first operating position 17 at the free end 11 of the lever arm 9. The handle 13 swivels by 90? out from the recess 12 between the webs S1, S2 to the left in the plane of the drawing into the first operating position 17.
(15) FIG. 3 shows the lifting gear 1 according to the invention from FIGS. 1 and 2, where the handle 13 however is swiveled by 90? to the right in the plane of the drawing out from the recess 12 between the webs S1, S2 into a second operating position 18.
(16) The variant embodiments represented in FIGS. 2 and 3 allow an operator to operate the lifting gear 1 according to the invention or the handle 13 connected to it by an articulated joint 15 with the left as well as the right hand, and without having to change his position with respect to the lifting gear 1. Thus, the operator can maintain an optimal position for performing the swivel movement of the lever arm 9.
(17) Furthermore, FIG. 4 shows a cross section representation along the longitudinal axis L of the lever arm 9, where the handle 13 is arranged in the recess of the free end 11 of the lever arm 9 in the starting position 14. The system of coordinates in the figures shows the position of the cross section planes.
(18) The cross section representation makes it clear that the handle 13 possesses a hollow grip body 19. The hollow grip body 19 receives an interior spring 20, which is coupled by a coupling element 21 as well as a sleeve 22 to the articulated joint 15. In the variant embodiment as per FIG. 4, the articulated joint 15 is formed by a bearing body 23, while a fixation element 24 reaches through the bearing body 23 as well as the coupling element 21 and joins them to each other in swiveling manner. The angle W between the longitudinal axis L of the lever arm 9 and the swivel axis SA of the articulated joint 15 is 90? here, thereby achieving an ergonomically gripping position.
(19) In the upper region of the handle 13 in the plane of the drawing of FIGS. 3 and 4 there is arranged an abutment 25. The grip body 19 is braced against the abutment 25 at its circumference. The biasing of the spring 20 can be adjusted by the size and position of the abutment 25. In this sample embodiment, the abutment 25 forms a single piece of material with the coupling element 21. The biasing force is thereby determined. Furthermore, FIG. 4 shows an opening 27 situated in the grip body 19, in which a closure body 26 of the grip body 19 is arranged. The closure body 26 closes the grip body 19 at the end face.
(20) FIG. 5 shows a cross section representation of the free end 11 of the lever arm 9 of FIG. 4 which has been swiveled by 90?. The fixation element 24 has been led through both the bearing body 23 of the articulated joint 15 and through the coupling element 21 and it joins these together. The force applied by the spring 20 in the force direction F, which runs from top to bottom in the direction of the figure along the longitudinal axis L of the lever arm 9, presses the grip body 19 into its starting position 14 via the sleeve 22.
(21) FIG. 6 shows the position of the handle 13 in a first operating position 17, the handle 13 being situated in a horizontal orientation with respect to the bearing body 23 and extending to the left in the plane of the drawing. The sleeve 22 in the first operating position 17 is in engagement with a first cavity 28 of the bearing body 23. The sleeve 22 is pressed by the spring 20 into the first cavity 28 and is held there by its centering shoulder 30 in a form fit and force locking manner. The force of the spring 20 in the variant embodiment shown extends from the left side of the drawing to the right side of the drawing in the force direction F. The recess 12 between the webs S1, S2 of the lever arm 9 is not blocked and can thus be used as a purchase for the operator's other hand.
(22) FIG. 7 shows the handle 13 in its second operating position 18, where the handle 13 is arranged horizontally in the direction of the drawing to the right of the bearing body 23. The sleeve 22 of the handle 13 is centered and pressed by the spring 20 in the second cavity 29 of the bearing body 23 and is held by force locking and form fit in the second cavity 29 in the second operating position 18. Here as well the recess 12 between the webs S1, S2 of the lever arm 9 is not blocked and thus likewise enables a grasping by the operator with his other hand. The force direction F of the force applied by the spring 20 runs here from right to left in the direction of the drawing.
(23) The foregoing description of some embodiments of the invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed, and modifications and variations are possible in light of the above teachings or may be acquired from practice of the invention. The specifically described embodiments explain the principles and practical applications to enable one ordinarily skilled in the art to utilize various embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims appended hereto, and their equivalents. Further, it should be understood that various changes, substitutions and alterations can be made hereto without departing from the spirit and scope of the invention as described by the appended claims.
