Lever Hoist

Abstract

The present invention relates to a lever hoist comprising a housing 2, in which a load chain sheave 15 and a drive shaft 19 that drives the load chain sheave 15 via a transmission mechanism 16 are rotatably supported. A driving moment can be transmitted to the drive shaft 19 via a lever 11. A load chain 9 is movable via the load chain sheave 15. The lever hoist 1 comprises a load brake 14, which has a pressure disc 27 and a locking wheel 12, which are arranged on the drive shaft 19. A locking wheel disc 23, which has teeth on its outer periphery, is mounted between the pressure disc 27 and the locking wheel 12. The locking wheel 12 has an internal thread 38 and is axially displaceable on a thread section 29 of the drive shaft 19, which has a brake thread 28. The locking wheel 12 has drive teeth 30 on its outer periphery for engaging the pawl 17. To decouple the pawl 17, and thus the hand lever 11, from engagement with the locking wheel 12 when the load chain 9 is blocked, the locking wheel 12 has an untoothed release section 32 on its outer periphery between the drive teeth 30 and the pressure disk-side end 31 of the locking wheel 12. Furthermore, a damper spring 44 is provided, which is arranged on the drive-side section of the drive shaft 19 between the threaded section 29 and the outer stop 40. When the load chain 9 is blocked and the load no longer slides smoothly, the locking wheel 12 is moved against the pressure of the damper spring 44 to such an extent that the pawl 17 is displaced from the drive teeth 30 into the untoothed release section 32. Thus, torque can no longer be transmitted and the lever 11 rotates freely.

Description

[Technical field]

[0001] The present invention relates to a lever hoist according to the features of the preamble of claim 1 .

[0002] Lever hoists are used to lift, lower and tow loads using a steel round link chain as the lifting or towing means. The present invention relates to a manually operated lever hoist, in which the lifting and lowering action is generated by manual operation of a lever. [Background technology]

[0003] From DE 10 200 03 133 A1 a lever-operated hoist, also called a hoist or chain hoist, is known. The hoist comprises a support hook as an upper mounting element and a load hook as a lower slinging element. The upper mounting element and the lower slinging element are indirectly connected to each other via a housing. The slinging element is connected to a traction means drive mechanism via a load chain as traction means, which is present in the housing of the hoist. By means of a swinging movement of the hand lever, the traction means drive mechanism can be rotated in the housing. For this purpose, the lever arm engages in a transmission mechanism device, which in turn is connected to the traction means drive mechanism. In this way, it is possible to displace or pull objects.

[0004] The traction means drive mechanism comprises, besides the drive with the switchable ratchet mechanism, a load brake, a load chain sheave and a transmission mechanism, which is often formed as a planetary gear. The hand lever and the locking wheel of the ratchet mechanism are fitted on one end of a drive shaft, which passes through the load brake and the load chain sheave. At the other end of the drive shaft there is a transmission mechanism, which in this case is coupled to transmit torque to the load chain sheave.

[0005] The road brake consists of a locking wheel disc, which is provided with notches or teeth on its outer circumference, two friction elements, usually friction discs or friction linings, located on either side of the locking wheel disc, and two locking pawls pivoted on the housing, which are pressed against the locking wheel disc under the effect of a locking hook spring. The two friction elements come into a frictionally coupled connection with the locking wheel disc, on the one hand, and with a pressure disc or locking wheel, which is fixed on the shaft, on the other hand. The locking wheel has an internal thread, with which it can be displaced axially on a thread section of the drive shaft, which has an external thread. The external thread has a comparatively large thread pitch, so that the locking wheel can be screwed smoothly on the drive shaft. The external thread is also called a dynamic thread or, technically, because it belongs to the road brake, also called a brake thread. In the following, the term brake thread is used.

[0006] The load brake has the task of holding the load suspended by the hoist at the respective height or position when the locking wheel is stationary. The locking wheel is then pressed against the pressure disk via the locking wheel disc and the integrated friction elements. The locking pawls are located in recesses on the circumferential surface of the locking wheel disc. When the locking wheel is rotated in the lifting direction, the locking pawls slide over the teeth of the locking wheel disc until the locking wheel comes to a standstill. The locking pawls then lock again in the recesses of the locking wheel disc. When the load is lowered, the locking wheel is rotated in the opposite direction, so that it slides axially on the brake thread of the drive shaft and the frictionally coupled contact of the friction elements of the locking wheel disc with the pressure disk is eliminated. The load can be lowered until the driven shaft again compensates for the axial play.

[0007] A lever hoist equipped with an idling device and an automatically acting load brake is also listed as a prior art in Patent Document 2.

[0008] In the case of a lever hoist, the load moment is transmitted to the load brake via the drive shaft. The relative rotation between the drive shaft and the locking wheel leads to an axial force by means of a brake thread, as a result of which the locking wheel disc is clamped between the pressure disc and the locking wheel. To release the load brake, a hand lever engages by means of a pawl, typically a pawl bar, in the drive toothing of the locking wheel. By rotation of the locking wheel, an axial displacement of the locking wheel is achieved. As a result, the braking moment is reduced or eliminated. The load can be lowered until the axial force and the resulting braking moment are built up again.

[0009] If the free sliding of the load and thus the continuous closing of the load brake is prevented, a dangerous situation can result. This can occur, for example, because the load chain is tangled or pinched, or also when blocked by a chain lock. If the operator then attempts to lower against such resistance, the locking wheel is displaced axially towards the end stop of the drive shaft until a non-rotatable connection is established and the full torque is introduced via the end stop. This can lead to destruction of the lever hoist, in particular of the stop or even of the drive shaft. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] German Patent No. 4105050 [Patent Document 2] German Patent No. 3323110 Summary of the Invention [Problem to be solved by the invention]

[0011] Starting from the prior art, the object of the present invention is therefore to provide a lever hoist which is improved in terms of safety and operational technology. [Means for solving the problem]

[0012] The solution to the above problem according to the invention lies in a lever hoist with the features of claim 1.

[0013] Advantageous developments and configurations of the lever hoist according to the invention are the subject of the dependent claims.

[0014] The lever hoist comprises a housing, in which a load chain sheave and a drive shaft that drives the load chain sheave via a transmission mechanism are rotatably supported. A driving moment can be transmitted to the drive shaft via the lever. A load chain is movable via the load chain sheave. The lever hoist comprises a load brake, which has a pressure disc and a locking wheel, the pressure disc and the locking wheel being arranged on the drive shaft. A locking wheel disc having teeth on its outer periphery is assembled between the pressure disc and the locking wheel. The locking wheel has an internal thread and is axially displaceable on a thread section of the drive shaft that has a braking thread. The locking wheel has a driving tooth row on its outer periphery for engaging the pawl.

[0015] The idea at the heart of the invention is to decouple the hand lever in the abovementioned dangerous situation, i.e. when it is blocked, so that torque can no longer be transmitted and the lever rotates freely. To achieve this, a damping spring is positioned between the locking wheel and the outer stop, which allows a larger axial movement of the locking wheel on the drive shaft. The locking wheel itself has, on its outer periphery, a drive toothing as well as a release section on the pressure disk side. The release section of the locking wheel is free to rotate on its outer periphery and is not toothed.

[0016] In order to decouple the pawl, and thus the hand lever, from engagement with the locking wheel when the load chain is blocked, the locking wheel has an untoothed release section on its outer periphery between the drive teeth and the end of the locking wheel facing the pressure disc. A damper spring is arranged on the drive-side section of the drive shaft, between the threaded section and the outer stop. The spring force of the damper spring acts against the opening action of the load brake. When the load chain is blocked and the load no longer slides smoothly, the locking wheel is moved against the pressure of the damper spring to such an extent that the pawl is displaced from the drive teeth into the untoothed release section. Torque can then no longer be transmitted and the lever rotates freely.

[0017] The damper spring is positioned between the locking wheel or brake thread and the outer stop (end stop) and allows an axial movement of the locking wheel and thus the drive teeth which is set to such an extent that in a blocking situation the hand lever and the force-transmitting pawl can be decoupled, so that torque transmission is interrupted. During normal operation, the pawl of the lever engages in the drive teeth and drives the locking wheel. If the load does not slide smoothly, the locking wheel is moved against the pressure of the damper spring to such an extent that the pawl is displaced from engagement with the drive teeth into the area of ​​the release section.

[0018] The damper spring is supported with its end facing the brake thread on an inner stop, which may be formed by a support ring positioned on the drive shaft. The inner stop abuts axially against the brake thread or in front of it. The damper spring is positioned on the smooth length of the drive shaft between an outer stop and an inner stop. The damper spring is a compression spring arranged concentrically on said length of the drive shaft.

[0019] When the locking wheel is moved against the pressure of the damper spring in the blocking position so that the pawl is released from engagement, the hand wheel coupled to the locking wheel also releases to the side. When the locking wheel is moved axially on the drive shaft against the spring force of the damper spring and the pawl is released from engagement with the drive teeth, an indication becomes visible. An abnormal operating state is thus signalled.

[0020] According to one advantageous embodiment, the display is formed by an indicator ring, which is arranged on the tube section of the locking vehicle. The indicator ring can be distinguished from the other components by color and can in particular be configured with a signal color or have an outer coating with a signal color. Due to the color configuration, a driving disorder in which the hand lever is disengaged can be easily seen.

[0021] By rotating the hand wheel clockwise, the pawl, and thus the lever, can be re-engaged and the force transmission path can be re-established.

[0022] Advantageously, the damper spring can also absorb dynamic shocks such as may occur when a blocking condition occurs suddenly.

[0023] The lever hoist according to the invention may additionally be equipped with a so-called arrestment brake, which generates an emergency braking in the event of freewheeling of the load chain sheave. When such an emergency braking, i.e. when the arrestment brake is activated, the system is also blocked. The damping spring then absorbs a significant portion of the impact energy. When such a blocking occurs, the hand lever is also decoupled according to the invention by the locking wheel being moved against the pressure of the damping spring and the pawl being displaced from the engagement with the drive toothing into the release section. This is indicated by a display, in particular an indicator ring. The appearance of the indicator ring can be used as a signal that the arrestment brake has been activated.

[0024] According to one practically advantageous configuration of the lever hoist according to the invention, the lever hoist is provided with an idling mechanism which is used for rotational decoupling of the drive shaft and which is designed to increase the axial distance between the locking wheel and the pressure disk.

[0025] The idling mechanism includes a hand wheel, which is connected to the locking wheel. By operating the hand wheel, the locking wheel is displaced axially on the drive shaft and the idling can be adjusted or eliminated. In the idling position, the drive shaft can rotate freely and the load chain sheave is released. The load chain can be pulled in both directions. By rotating the hand wheel or by pulling the outer strand, the load chain can be brought into the preloaded state in the desired working position.

[0026] Advantageously, a release switching spring is installed between the locking wheel and the pressure disc, the spring force of which assists the opening operation of the load brake.

[0027] The invention will now be explained in more detail with reference to the drawings. [Brief description of the drawings]

[0028] [Figure 1] FIG. 2 is a side view of the lever hoist. [Diagram 2] FIG. 2 is an exploded view of the components of a lever hoist. [Diagram 3] FIG. 2 is a vertical cross-sectional view of the lever hoist. [Figure 4] 4 corresponds to the view of FIG. 3, but of the lever hoist with the hand wheel and the locking wheel in the released position. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] 1 to 4 show a manually operated lever hoist 1 according to the invention. The housing 2 is a component of the lever hoist 1 and is made up of a number of housing parts 3, 4 as well as a side plate 5 and a spacer frame 6. The lever hoist 1 comprises a support hook 7 as an upper mounting element and a load hook 8 as a lower slinging element. The support hook 7 and the load hook 8 are indirectly connected to each other via the housing 2. The load hook 8 is fastened to one end of a load chain 9. At the other end of the load chain 9, a chain end piece 10 is provided. The load chain 9 is movable via a traction means drive mechanism. The traction means drive mechanism mainly comprises a drive section with a hand lever 11, a locking wheel 12 and a switchable ratchet mechanism 13, a load brake 14, a load chain sheave 15 and a transmission mechanism 16. A pawl 17 in the form of a pawl bar is spring-loaded and longitudinally slidably supported in the hand lever 11. The hand lever 11 having the pawl 17 and the locking wheel 12 are fitted to one end section 18 of a drive shaft 19, which passes through the load brake 14 and the load chain sheave 15. The other end section 20 of the drive shaft 19 includes a transmission mechanism 16, which is coupled to the load chain sheave 15 so as to transmit torque to the load chain sheave 15. A hand wheel 21 is used to axially displace the locking wheel 12 on the drive shaft 19 to operate an idling mechanism 22 of the lever hoist 1.

[0030] The load brake 14 has a locking wheel disc 23, which is provided with teeth on its outer periphery. On both sides of the locking wheel disc 23, friction elements 24 in the form of friction linings are provided. The load brake 14 further has two locking pawls 25 which are pivotally supported on the side plates 5 in the housing 2, and which are pressed against the locking wheel disc 23 under the influence of locking hook springs 26. The load brake 14 also includes a pressure disc 27, on which the locking wheel disc 23 is supported. The locking wheel 12 is axially displaceable on a thread section 29 of the drive shaft 19, which has a brake thread 28.

[0031] The load brake 14 has the task of holding the load suspended by the lever hoist 1 when the locking wheel 12 is stationary. The locking wheel 12 is then pressed against the pressure disc 27 via the locking wheel disc 23 and the integrated friction element 24. The locking pawls 25 are located in the peripheral recesses of the locking wheel disc 23. When the locking wheel 12 is rotated in the raising direction, the locking pawls 25 slide over the teeth of the locking wheel disc 23 until the locking wheel 12 comes to a standstill. The locking pawls 25 then lock again in the recesses of the locking wheel disc 23. When the load is lowered, the locking wheel 12 is rotated in the opposite direction, whereby it slides axially on the brake thread 28 of the drive shaft 19 and the frictionally coupled contact between the friction element 24 of the locking wheel disc 23 and the pressure disc 27 is released. The load can then be lowered until the driven drive shaft 19 again compensates for the axial play.

[0032] The locking wheel 12 has a drive toothing 30 on its outer periphery. The drive toothing 30 has teeth extending longitudinally in the axial direction with grooves arranged between the teeth. The region with the drive toothing 30 extends over a first length of the locking wheel 12 on the front side, seen from the hand wheel 21. Between the drive toothing 30 and the end 31 of the locking wheel 12 on the pressure disk side, a release section 32 is provided which is not toothed and can rotate freely. The release section 32 is not toothed and can rotate freely and extends from the drive toothing 30 over a second length on the rear side of the locking wheel 12. At the end 31, the locking wheel 12 has a radial flange which is enlarged with respect to the diameter of the release section 32.

[0033] The locking wheel 12 is of hollow cylindrical design and has a cavity 33. The hand wheel 21 is fixed to the end face of the surrounding outer wall 34 of the locking wheel 12 by means of mounting screws 35. In the bottom 36 of the locking wheel 12 there is a central through-opening 37 which has an internal thread 38. By means of this internal thread 38 the locking wheel 12 runs on the brake thread 28 of the drive shaft 19.

[0034] The drive shaft 19 passes through the locking wheel 12 and with its end section 18 passes through it into a central cavity 39 provided in the hand wheel 21. At the free end of the drive shaft 19 there is an outer stop 40. The outer stop 40 acts as an end stop and is formed by a retaining nut 41 and a disk 42 which is arranged on the end of the drive shaft 19 before the retaining nut 41. The retaining nut 41 is screwed onto the thread section provided at the end of the drive shaft 19. The length section 43 of the drive shaft 19 between the brake thread 28 and the outer stop 40 is designed smooth.

[0035] A damper spring 44 is arranged on the length 43. The damper spring 44 is a compression spring which extends concentrically around the length 43 of the drive shaft 19 between an outer stop 40 and an inner stop 45. With its end which faces the brake thread 28, the damper spring 44 is supported on the inner stop 45. The inner stop 45 is formed by a support ring 46 which is arranged on the drive shaft 19 in front of the brake thread 28.

[0036] The spring force F1 of the damper spring 44 acts against the opening operation of the load brake 14. The spring force F1 presses the load brake 14 in the closing direction.

[0037] During normal or fault-free operation, the pawls 17 of the ratchet mechanism 13 engage in the grooves between the teeth of the drive teeth 30. This operating state is shown in Figure 3. During normal operation, a load moment is transmitted to the load brake 14 via the drive shaft 19. Relative rotation between the drive shaft 19 and the locking wheel 12 leads to an axial force by the brake threads 28, which causes the locking wheel disc 23 to be clamped between the pressure disc 27 and the locking wheel 12.

[0038] To release the load brake 14, the hand lever 11 engages by means of the pawl 17 into the drive teeth 30 of the locking wheel 12. Rotation of the locking wheel 12 causes an axial displacement of the locking wheel 12. As a result, the braking moment is reduced or eliminated. The load can be lowered until the axial force and the resulting braking moment are built up again.

[0039] For example, if the load chain 9 becomes tangled or pinched, preventing the free sliding of the load and therefore the continued closing of the load brake 14, a dangerous situation can result, especially if the user does not recognize the situation and attempts to lower the load against resistance.

[0040] The locking wheel 12 is displaced axially towards the outer stop 40 of the drive shaft 19. However, before a torsionally rigid connection of the locking wheel 12 at the outer stop 40 has been made, where a full torque could be introduced via the end stop, the hand lever 11 is disengaged.

[0041] For this purpose, a damper spring 44 is positioned between the locking wheel 12 and the outer end stop 40. The damper spring 44 allows a greater axial movement of the locking wheel 12 on the brake thread 28 away from the pressure disk 27. The damper spring 44 then contracts.

[0042] The locking wheel 12 is moved against the pressure of the damper spring 44 to such an extent that the pawl 17 is disengaged from the drive toothing 30 and is displaced into the area of ​​the release section 32. The force transmission path is interrupted in this position. This operating state is shown in the diagram in FIG.

[0043] The locking wheel 12, and with it the hand wheel 21, are released to the left in the drawing plane. The damper spring 44 is compressed. In this position, torque can no longer be transmitted and the hand lever 11 rotates freely.

[0044] At the same time, the hand wheel 21 connected to the locking wheel 12 releases laterally and a display 47 in the form of an indicator ring 48 becomes visible. The indicator ring 48 is arranged on the outside of the locking wheel 12 on a tube section 49. In the released position, the indicator ring 48 protrudes from the housing part of the hand lever 11 which surrounds the locking wheel 12. In particular by means of its coloured configuration, the indicator ring 48 makes it visible that the force transmission path has been interrupted and that the hand lever 11 has been released and decoupled from the normal operating position.

[0045] By rotating the hand wheel 21 clockwise, the hand lever 11 can be re-engaged. The locking wheel 12 is displaced again towards the pressure disc 27 until the pawl 17 again engages with the drive teeth 30, so that the lever hoist 1 is set in the normal operating state.

[0046] To operate the free-wheel mechanism 22, the axial distance between the locking wheel 12 and the pressure disk 27 can be enlarged by rotating the hand wheel 21, so that the pawl 17 is disengaged from the drive teeth 30. A release switching spring 50 is installed between the locking wheel 12 and the pressure disk 27. The spring force F2 of the release switching spring 50 acts outwardly toward the end 18 of the drive shaft 19 or the hand wheel 21, assisting the release operation of the load brake 14.

[0047] In addition to the standard load brake 14, the lever hoist 1 is equipped with a restraint brake 51. The restraint brake 51 serves to provide emergency braking in extreme situations where the rotation speed of the drive shaft 19 may become so high that the load brake 14 is no longer effective due to inertia.

[0048] The arresting brake 51 comprises a locking disc 52 with locking teeth, a control disc 53 with a control cam and a locking hook 54. The locking hook 54 is arranged pivotally on the side plate 5 of the lever hoist 1. The locking disc 52 and the control disc 53 are pivotable relative to one another. During normal operation of the lever hoist 1, the locking hook 54 is guided via the control cam of the control disc 53 in such a way that the claw contour of the locking hook 54 does not engage in the locking disc 52. When an overshoot of a predefined overshoot speed is reached, the locking hook 54 lifts off the control disc 53 as a result of the mass inertia and the acting acceleration forces and engages in the locking teeth of the locking disc 52. This stops the locking disc 52 and, together with the locking disc 52, the drive shaft 19 due to the form-locking connection. Further freewheeling of the load chain sheave 15 is prevented. This application relates to the invention described in the claims, but also includes the following as other aspects. 1. A lever hoist (1), The hydraulic lifting device includes a housing (2), in which a load chain sheave (15) and a drive shaft (19) that drives the load chain sheave (15) via a transmission mechanism (16) are rotatably supported, a drive moment can be transmitted to the drive shaft (19) via a lever (11), and a load chain (9) is movable via the load chain sheave (15), a load brake (14) comprising a pressure disc (27) and a locking wheel (12), the pressure disc (27) and the locking wheel (12) being arranged on the drive shaft (19), a locking wheel disc (23) being mounted between the pressure disc (27) and the locking wheel (12), the locking wheel (12) being displaceable in the axial direction on a thread section (29) of the drive shaft (19) having a brake thread (28) by means of an internal thread (38), the locking wheel (12) having a drive tooth arrangement (30) for engaging a pawl (17) on the outer periphery of the locking wheel (12); In the lever hoist (1), The locking wheel (12) has a release section (32) on the outer periphery between the drive tooth row (30) and an end (31) of the locking wheel (12) on the pressure disk side, the release section (32) having no teeth cut thereon, a damper spring (44) is provided, the damper spring (44) being disposed on the drive length (43) of the drive shaft (19) between the brake thread (28) and an outer stop (40); A lever hoist (1). 2. The lever hoist according to claim 1, wherein the spring force (F1) of the damper spring (44) acts against the opening operation of the load brake (14). 3. 3. The lever hoist according to claim 1 or 2, wherein the damper spring (44) is supported by an inner stopper (45) at an end of the damper spring (44) facing the brake screw thread (28). 4. 4. The lever hoist according to any one of claims 1 to 3, characterized in that the locking wheel (12) is moved axially on the drive shaft (19) against the spring force (F1) of the damper spring (44) and the pawl (17) is released from engagement with the drive teeth (30), and is provided with an indication (47) that is visible when the locking wheel (12) is moved axially on the drive shaft (19) against the spring force (F1) of the damper spring (44) and the pawl body (17) is released from engagement with the drive teeth (30). 5. The lever hoist of claim 4, characterized in that the indication (47) is formed by an indicator ring (48), and the indicator ring (48) is arranged on a tube section (49) of the locking wheel (12). 6. 6. The lever hoist according to any one of claims 1 to 5, characterized in that it is provided with an idling mechanism (22) formed to expand the axial distance between the locking wheel (12) and the pressure disc (27). 7. 7. The lever hoist according to any one of claims 1 to 6, characterized in that the free-wheeling mechanism (22) has a hand wheel (21), the hand wheel (21) being connected to the locking wheel (12) and being used to axially displace the locking wheel (12) on the drive shaft (19). 8. 8. The lever hoist according to any one of claims 1 to 7, characterized in that a release switching spring (50) is incorporated between the locking wheel (12) and the pressure disc (27), and a spring force (F2) of the release switching spring (50) assists the release operation of the load brake (14). [Explanation of symbols]

[0049] 1 Lever Hoist 2. Housing 3 Housing part 4 Housing part 5 Side Panel 6 Spacer Frame 7 Support Hook 8. Load Hook 9 Load Chain 10 Chain end piece 11 Hand Lever 12 Locking car 13 Ratchet mechanism 14 Road brake 15 Load Chain Sheave 16 Transmission Mechanism 17 Claw body 18 19 End Section 19 Drive shaft 20 19 End Section 21 Hand Wheel 22 Idle mechanism 23 Locking wheel disc 24 Friction element 25 Locking claw 26 Locking hook spring 27 Pressure Disc 28 Braking threads 29 Thread Section 30 Driving dentition 31 End of 12 32 Release section 33 Hollow chamber 34 12th exterior wall 35 Mounting screw 36 Bottom of 12 37 Through opening 38 12 female threads 39 Vacant space in 21 40 Outer stopper 41 Retaining nut 42 Discs 43 19 length interval 44 Damper spring 45 Inner stopper 46 Support Ring 47 Display 48 Indicator Ring 49 Pipe Section 50 Release switch spring 51 Captive brake 52 Locking disk 53 Control Disk 54 Restraint Hook F1 44 spring force F2 50 spring force

Claims

1. A lever hoist (1), The lifting device includes a housing (2), in which a load chain sheave (15) and a drive shaft (19) that drives the load chain sheave (15) via a transmission mechanism (16) are rotatably supported, a drive moment can be transmitted to the drive shaft (19) via a lever (11), and a load chain (9) is movable via the load chain sheave (15), A load brake (14) is provided with a pressure disc (27) and a locking wheel (12), the pressure disc (27) and the locking wheel (12) being arranged on the drive shaft (19), a locking wheel disc (23) being installed between the pressure disc (27) and the locking wheel (12), the locking wheel (12) being axially displaceable by means of an internal thread (38) on a thread section (29) of the drive shaft (19) having a brake thread (28), the locking wheel (12) having a drive tooth arrangement (30) on the outer periphery of the locking wheel (12) for engagement of a pawl (17), In the lever hoist (1), The locking wheel (12) has an untoothed release section (32) on the outer periphery between the drive tooth row (30) and an end (31) of the locking wheel (12) on the pressure disk side, a damper spring (44) is provided, said damper spring (44) being arranged on the drive side length (43) of said drive shaft (19) between said brake thread (28) and an outer stop (40); A lever hoist (1).

2. 2. The lever hoist of claim 1, wherein the spring force (F1) of the damper spring (44) acts against the opening movement of the load brake (14).

3. 3. A lever hoist according to claim 1 or 2, characterized in that the damper spring (44) is supported on an inner stop (45) with the end of the damper spring (44) facing the brake thread (28).

4. 4. A lever hoist as claimed in claim 1, further comprising an indication (47) which is visible when the locking wheel (12) is moved axially on the drive shaft (19) against the spring force (F1) of the damper spring (44) and the pawl (17) is released from engagement with the drive teeth (30).

5. 5. The lever hoist according to claim 4, characterized in that the indicia (47) is formed by an indicator ring (48), the indicator ring (48) being arranged on a tube section (49) of the locking wheel (12).

6. The lever hoist according to any one of claims 1 to 5, further comprising an idling mechanism (22) formed to expand an axial distance between the locking wheel (12) and the pressure disk (27).

7. 7. The lever hoist according to claim 6, characterized in that the free-wheeling mechanism (22) has a hand wheel (21) connected to the locking wheel (12) and used to axially displace the locking wheel (12) on the drive shaft (19).

8. The lever hoist according to any one of claims 1 to 7, characterized in that a release switching spring (50) is installed between the locking wheel (12) and the pressure disc (27), and a spring force (F2) of the release switching spring (50) assists the release operation of the load brake (14).

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