CN114616204A

CN114616204A - Lifting device for a structural component of a motor vehicle and method for fixing at least one carrying arm of a lifting device

Info

Publication number: CN114616204A
Application number: CN202080078046.9A
Authority: CN
Inventors: J·希勒; M·斯泰尔瓦根; S·休默; A·布奇科夫斯基
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2019-11-11
Filing date: 2020-09-23
Publication date: 2022-06-10
Anticipated expiration: 2040-09-23
Also published as: EP4058394A1; DE102019217352A1; WO2021094022A1; CN114616204B

Abstract

Lifting device for a structural component of a motor vehicle, having a load-receiving unit (2) with at least one carrying arm (3) and a support unit (4) which can be arranged at a lifting unit, wherein the at least one carrying arm (3) can be rotated about a central axis (10), characterized in that the at least one carrying arm (3) is connected to a lever clamping device (30), wherein the lever clamping device (30) can be fixed at a central disk (11), wherein the central disk (11) is arranged rotationally symmetrically about the central axis (10).

Description

Lifting device for a structural component of a motor vehicle and method for fixing at least one carrying arm of a lifting device

Technical Field

The invention relates to a lifting device for a structural component of a motor vehicle having the features of the preamble of claim 1. The invention further relates to a method for fixing at least one carrying arm of a lifting device having the features of independent claim 9.

Background

Hoisting devices are mostly used in factories for motor vehicles in order to assemble or disassemble heavy structural components, such as for example drive equipment. The lifting device usually has a load receiving unit for receiving the structural component and a support unit which can be arranged on the lifting unit. The load-receiving unit is positioned by a movement or adaptation of the carrying arm relative to the structural component of the motor vehicle.

DE 102014117703 a1 discloses a lifting device for a structural component of a motor vehicle. The lifting device has a load receiving unit with at least one carrying arm. A coupling unit for releasably connecting the carrier arm to a structural component of the motor vehicle is arranged on the carrier arm.

A lifting device for a motor vehicle structural assembly is also shown in EP 3336633 a 1. The motor vehicle structural component has a load receiving unit having at least one carrying arm which can be pivoted about a longitudinal axis of the load receiving unit, and a coupling unit arranged on the carrying arm for releasably connecting the carrying arm to the motor vehicle structural component. Furthermore, a locking unit is shown, which makes it possible to lock the set position of the carrying arm, i.e. the position of the carrying arm pivoted relative to the load receiving unit. The locking unit has a brake body which can be adjusted by means of an actuating element, in particular a tension lever, in the direction of the housing base body of the load-receiving unit.

Disclosure of Invention

The object of the present invention is to provide a lifting device for a structural component of a motor vehicle and a method for fixing at least one carrying arm of a lifting device, which enable a particularly simple, reliable and efficient manner of fixing the carrying arm. The lifting device according to the invention enables any angular adjustment of the carrying arm.

Advantageously, the lever clamping device has at least two spring-loaded pins on the side facing the central disk, which pins can be dissipated in the deepening against the spring force. In this way, the fixing is achieved by a force-fitting closure which is a multiple of the spring force, and therefore with a greater force than when only two smooth or roughened surfaces are pressed against one another by the lever clamp.

Further advantages are obtained by: the central disk has a bore with an inner diameter corresponding to the outer diameter of the spring-loaded pin, so that a form-locking can take place between the spring-loaded pin and the bore. The positive connection between the at least one pin and the bore leads to a further strengthening of the fastening.

The arrangement of the bore at the outer boundary of the central disk is advantageous, since it enables a smaller and more cost-effective embodiment of the lever clamping device.

It is advantageous if the bores are arranged as closely as possible and at uniform intervals along the outer boundary of the central disk, since in this way the possibility of simultaneous force-locking and form-locking is increased. If an angular position is selected in which only a force-fitting connection can be achieved and extremely high axial forces act on the carrying arm, the carrying arm can be pushed only slightly in the axial direction. Due to the axial displacement, after a small angle has been displaced, the spring-loaded bolt and the bore can form-lock, so that further displacement is prevented.

The lever clamping device, which can be fastened to the central disk by means of screws, is advantageous due to the simple and cost-effective design.

In order to adapt the lifting device to different structural components of the vehicle as flexibly and simply as possible, the lifting device has a coupling or receiving unit which is arranged at the carrying arm so as to be longitudinally movable and is designed to releasably connect the carrying arm to a structural component of the motor vehicle.

Advantageously, the fixing of the at least one carrying arm can be achieved by a force-fitting closure, wherein at least one spring-loaded pin located at the lever clamping device is pressed against the central disk. Due to the possibility of securing only by force-fitting, any desired angular position of the at least one carrying arm can be set. This is a great advantage, since the hoisting device can thus be set flexibly. Due to the force exerted by the spring-loaded pin on the surface of the central disk, a reliable fixing of the carrier arm is possible even in positions in which no form-locking is achieved.

It is particularly advantageous that, depending on the angular position when the at least one carrying arm is fixed, the at least one spring-loaded pin and the bore of the central disk additionally form-lock in that: a spring-loaded pin is inserted into the bore. The fixation is improved by a positive lock that acts in addition to the force-transmitting lock.

Drawings

Preferred embodiments of the present invention are shown in the drawings and are explained in more detail in the following description.

Wherein:

fig. 1 shows a perspective view of a lifting device with a load receiving unit having four carrying arms;

fig. 2 shows an enlarged detail of the central disk together with the carrier arms, which detail shows the fastening of the carrier arms in the closed state;

fig. 3 shows an enlarged detail of the central disk together with the carrier arms, which detail shows the fixing of the carrier arms in the open state; and is

Fig. 4 shows a first view of a central disc with a bore.

Detailed Description

Fig. 1 shows a perspective view of a lifting device 1 with a load-receiving unit 2 and a support unit 4, which can be fastened, for example, at a lifting unit. The load receiving unit 2 is intended to be connected to a component of a motor vehicle and for this reason has at least one carrying arm 3.

Fig. 1 shows an exemplary embodiment with four carrier arms 3, wherein the four carrier arms 3 can be rotated about a central axis 10. In order to design the connection between the components of the motor vehicle and the load receiving unit 2 as flexibly as possible, the carrier arm 3 can have at least one coupling unit 9 or at least one receiving unit 9, which are arranged at the carrier arm 3 so as to be longitudinally displaceable and are designed to releasably connect the carrier arm 3 to the structural component of the motor vehicle.

In addition to the at least one carrying arm 3, the load receiving unit 2 also has a central disk 11, wherein the central disk 11 is arranged rotationally symmetrically about the central axis 10.

The carrier arm 3 is connected to the lever clamp 30 such that the edge 12 of the central disc 11 is located between the lower boundary of the central disc 11 and the lever clamp 30. By means of the lever clamp 30, the carrier arm 3 can be fixed to the central disk 11, so that the carrier arm 3 can no longer be moved or released, so that it can be rotated about the central axis 10.

Fig. 2 shows an enlarged detail of the central disk 11 with the carrier arm 3, which detail shows the fastening of the carrier arm 3 in the closed state. A lever clamping device 30 is fastened at the end of the carrier arm 3 facing the central disc 11. The edge 12 of the central disk 11, which is designed as a guide edge, is surrounded not only by the carrier arm 3 but also by the lever clamping device 30. The fixing of the carrier arm 3 is achieved by: the screw 13 in the thread is tightened. The fixing of the carrier arm 3 is released by: the screw 13 in the thread is opened.

The carrier arm 3 is furthermore connected to the central disk 11 via a bracket 14 which can be rotated about the holder, so that the carrier arm 3 is connected to the central disk 11 even if the fastening is opened.

Fig. 3 shows an enlarged detail of the central disk 11 with the carrier arms, which detail shows the fastening of the carrier arms in the open state.

The lever clamping device 30 has at least two spring-loaded pins 32 on the side facing the central disk 11. The spring-loaded pin 32 is spring-loaded and can be completely recessed against the spring force in a deepened portion of the lever clamping device 30. The deepening has a diameter corresponding to the outer diameter of the spring-loaded pin 32. The spring-loaded pin 32 can have a circular cross section and a rounded tip at the top.

When the support arm 3 is fixed to the central disk 11 by tightening the screw 13, the spring-loaded pin 32 is inserted into the recess and acts on the surface of the central disk 11 with a force corresponding to the spring force.

In another embodiment, the central disk 11 can have a bore 33. In fig. 4, the corresponding central disk 11 is shown with a bore 33. The bore 33 is arranged on the lower side of the central disk 11, i.e. on the side facing the support unit 4. In this case, when the carrier arm 3 assumes an angular position such that the bore 33 and the spring-loaded pin 32 lie opposite one another, the bore 33 is arranged such that it can form-fit with the spring-loaded pin 32. The bore 33 has an inner diameter corresponding to the outer diameter of the spring-loaded pin 32.

The bores 33 are arranged at the same distance from the central axis 10 as the spring-loaded pins 32. The bore 33 is mostly arranged at the outer boundary of the central disk 11, so that the spring-loaded pin 32 and the bore 33 can form a positive connection. The bores 33 are arranged at uniform intervals along the outer boundary of the central disk 11.

According to a particularly preferred embodiment, seventy-two bores 33 are arranged uniformly distributed over the central disk 11. The center point of each bore 33 has an angle of 5 ° with respect to the next bore 33, proceeding from the central axis 10. Each bore 33 has a diameter of 5 mm and a depth of 4.5 mm. In each case 6 spring-loaded pins 32 are arranged on the lever holding device 30, the center point of the annular pin 32, starting from the central axis 10, having an angle of 5.2 ° with respect to the center point of the next pin 32.

The fixing of the at least one carrier arm 3 at the central disk 11 can be effected in two ways depending on the selected angular position.

If the angular position is selected such that there is no spring-loaded pin 32 and no bore 33 directly opposite it, the mounting of the support arm 3 is achieved by a force-fitting connection. The force-transmitting closure is achieved by: a spring-loaded pin 32 arranged on the lever clamping device 30 is pressed against the central disc 11.

If, on the other hand, the angular position is selected such that the at least one spring-loaded pin 32 and the at least one bore 33 are opposite each other, the mounting of the support arm 3 is achieved by a form-and force-fitting connection. The form-locking is achieved by: the at least one spring-loaded pin 32 forms a form-locking connection with the at least one bore 33 by: the spring-loaded pins 32 are inserted into the bores 33, and the remaining spring-loaded pins 32 are pressed against the central disk 11 and form a force-fitting connection.

In the illustrated embodiment of fig. 2 and 3, the lever clamp device 30 has six spring-loaded pins 32.

In the case of an embodiment with six spring-loaded pins 32, the securing of the carrier arm 3 with a purely force-fitting connection (the angular position is selected such that the bore 33 and the pin 32 are not opposite) is achieved in that: six spring-loaded pins 32 are pressed against the wall of the central disc 11. Since each of the spring-loaded pins 32 is loaded with a spring force, a force-transmitting closure is achieved between the carrier arm 3 and the central disk 11, which corresponds to at least six times the spring force. In addition to the force caused by the spring, a force-fitting closure is also achieved due to the surface friction between the further contact points between the carrier arm 3 with the lever clamping device 30 and the central disk 11.

If, on the other hand, the angular position is selected in this exemplary embodiment such that the spring-loaded pin 32 and the bore 33 are directly opposite each other, the mounting of the support arm 3 is achieved by a form-and force-fitting connection. In the case of a force-fitting closure, the remaining five spring-loaded pins 32 are pressed against the wall of the central disk 11. Since each of the spring-loaded pins 32 is loaded with a spring force, a force-transmitting closure is achieved between the carrier arm 3 and the central disk 11, which corresponds to at least five times the spring force. In addition to the force caused by the spring, a force-fitting closure is also achieved due to the surface friction between the further contact points between the carrier arm 3 with the lever clamping device 30 and the central disk 11.

Claims

1. Lifting device (1) for a structural component of a motor vehicle, having a load receiving unit (2) with at least one carrying arm (3) and a support unit (4) which can be arranged at a lifting unit, wherein the at least one carrying arm (3) can be rotated about a central axis (10), characterized in that the at least one carrying arm (3) is connected with a lever clamping device (30), wherein the lever clamping device (30) can be fixed at a central disc (11), wherein the central disc (11) is arranged rotationally symmetrically about the central axis (10).

2. Hoisting device (1) according to claim 1, characterized in that the lever clamping means (30) have at least two spring-loaded pins (32) on the side facing the central disc (11).

3. Hoisting device (1) according to claim 2, characterized in that the spring-loaded pin (32) is completely submersible in a deepened portion against the spring force.

4. Hoisting device (1) as claimed in any one of the preceding claims, characterized in that the central disc (11) has a bore (33) with an inner diameter corresponding to the outer diameter of the spring-loaded pin (32), so that a form-locking can take place between the spring-loaded pin (32) and the bore (33).

5. Hoisting device (1) according to claim 4, characterized in that said bore hole (33) is arranged at the border of the outside of said central disc (11).

6. Hoisting device (1) according to claim 5, characterized in that the bores (33) are arranged at uniform intervals along the boundary of the outer part of the central disc (11).

7. Hoisting device (1) as claimed in any one of the preceding claims, characterized in that the lever clamping means (30) can be fixed at the central disc (11) by means of a screw (13) guided by a thread (36).

8. Hoisting device (1) according to claim 1 or 2, wherein a coupling unit (9) or a receiving unit (9) is longitudinally movably arranged at the carrying arm (3) and is configured for releasably connecting the carrying arm (3) with a structural component of a motor vehicle.

9. Method for fixing at least one carrying arm (3) of a hoisting device (1) according to any one of the preceding claims, characterized in that the fixing of the at least one carrying arm (3) is effected by a force-transmitting lock, wherein at least one spring-loaded pin (32) at the lever clamping device (30) is pressed against the central disc (11).

10. Method for fixing at least one carrier arm (3) according to claim 9, wherein at least one spring-loaded pin (32) and a bore (33) of the central disk (11) additionally achieve a form-locking, depending on the angular position when fixing the at least one carrier arm (3), in that: a spring-loaded pin (32) is inserted into the bore (33).