CN114616204B

CN114616204B - Lifting device for a structural component of a motor vehicle and method for fastening at least one load arm of a lifting device

Info

Publication number: CN114616204B
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: 2024-04-16
Anticipated expiration: 2040-09-23
Also published as: CN114616204A; WO2021094022A1; EP4058394A1; DE102019217352A1

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 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).

Description

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

Technical Field

The present invention relates to a lifting device for a structural component of a motor vehicle. The invention further relates to a method for fastening at least one load arm of a lifting device.

Background

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

A lifting device for a structural component of a motor vehicle is known from DE 1020114117703 A1. The lifting device has a load receiving unit with at least one load carrying arm. A coupling unit is arranged at the carrier arm for releasably connecting the carrier arm to a structural component of the motor vehicle.

A lifting device for a motor vehicle structural component is also shown in EP 3336633 A1. The motor vehicle structural component has a load-receiving unit with at least one support arm pivotable about a longitudinal axis of the load-receiving unit and a coupling unit arranged at the support arm for releasably connecting the support arm to the motor vehicle structural component. Furthermore, a locking unit is shown which enables locking of a set position of the support arm, i.e. a position of the support arm which is 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 tensioning 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 fastening at least one support arm of a lifting device, which enable a particularly simple, reliable and efficient fastening of the support arm. The lifting device according to the invention enables any angular adjustment of the load-bearing arm.

Advantageously, the lever holding device has at least two spring-loaded pins on the side facing the central disk, which can be relieved in the deepened portion against the spring force. In this way, the fastening is achieved by a force-transmitting closure which is a multiple of the spring force, and thus with a greater force than when only two smooth or roughened surfaces are pressed against one another by the lever clamping device.

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 between the spring-loaded pin and the bore is possible. The form-locking between the at least one pin and the borehole causes a further strengthening of the fixation.

The arrangement of the bore holes at the boundary of the outer part of the central disk is advantageous, since this enables a smaller and less costly embodiment of the lever clamping device.

The bores are advantageously arranged as closely as possible and at uniform distances along the outer boundary of the central disk, since in this way the possibility of simultaneous force-and form-locking is increased. If an angular position is selected in which only a force-transmitting engagement is possible and extremely high axial forces are exerted on the support arm, the support arm can only be moved to a small extent in the axial direction. As a result of the axial displacement, after a small angle has been displaced, the spring-loaded pin and the borehole can form a positive fit, so that further displacement is prevented.

The lever clamping device which can be fastened to the central disk by means of a screw thread is advantageous in view of a simple and cost-effective construction.

In order to adapt the lifting device as flexibly and simply as possible to different structural components of the vehicle, it has a coupling unit or a receiving unit which is arranged longitudinally displaceably on the support arm and is designed to releasably connect the support arm to the structural components of the motor vehicle.

The fastening of the at least one carrier arm can advantageously be achieved by a force-transmitting closure, wherein at least one spring-loaded pin located on the lever clamping device is pressed against the central disk. As a result of the possibility of securing only by means of a force-fitting engagement, each arbitrary angular position of the at least one support arm can be set. This is a great advantage, since the hoisting device can thus be flexibly set. Due to the force exerted by the spring-loaded pin on the surface of the central disk, a reliable fixing of the carrier arm can be achieved even in positions in which no form-locking is achieved.

A particular advantage is that, depending on the angular position of the at least one carrier arm when it is fixed, the at least one spring-loaded pin and the bore of the central disk additionally form-fit in such a way that: a spring loaded pin is embedded into the borehole. The fixation is improved by a form-locking which acts in addition to the force-transmitting locking.

Drawings

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

Wherein:

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

fig. 2 shows an enlarged partial view of the central disk together with the carrier arm, which shows the carrier arm in the closed state in a fixed manner;

fig. 3 shows an enlarged partial view of the central disk together with the carrier arm, which shows the carrier arm in the open state in a fixed manner; and is also provided with

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 carrier arm 3.

In fig. 1 an embodiment with four carrier arms 3 is shown, wherein the four carrier arms 3 are rotatable 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 is arranged longitudinally displaceably on the carrier arm 3 and is designed to releasably connect the carrier arm 3 to a structural component of the motor vehicle.

In addition to the at least one carrier 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 clamping device 30 such that the edge 12 of the central disc 11 is located between the boundary under the central disc 11 and the lever clamping device 30. By means of the lever clamping device 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 again, so that the carrier arm can be rotated about the central axis 10.

Fig. 2 shows an enlarged partial view of the central disk 11 together with the support arm 3, which shows the support arm 3 in the closed state. The lever clamping means 30 are 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 support arm 3 but also by the lever holding device 30. The fixation of the carrier arm 3 is achieved by: the screw 13 in the thread is screwed down. The fixation 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 by means of a collar 14 which can be rotated about the holder, so that the carrier arm 3 is connected to the central disk 11 even when the fastening is opened.

Fig. 3 shows an enlarged partial view of the central disk 11 together with the carrier arm, which shows the carrier arm in the open state in a fixed manner.

The lever holding 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 sink completely into the deepened portion of the lever clamping device 30 against the spring force. 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 above.

When the carrier arm 3 is fixed at the central disk 11 by tightening the screw 13, the spring-loaded pin 32 is countersunk in the deepened portion 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, a corresponding central disc 11 with a bore 33 is shown. Here, the bore 33 is arranged on the underside of the central disk 11, i.e. on the side facing the support unit 4. In this case, when the support arm 3 assumes an angular position such that the bore 33 and the spring-loaded pin 32 are opposite, the bore 33 is arranged such that it can form a positive 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.

Here, 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 boundary of the outer part of the central disk 11, so that the spring-loaded pin 32 can form-lock with the bore 33. Here, 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 on the central disk 11. The middle point of each borehole 33 has an angle of 5 ° from the central axis 10 with respect to the next borehole 33. Each borehole 33 has a diameter of 5mm and a depth of 4.5 mm. On the lever holding device 30, 6 spring-loaded pins 32 are arranged in each case, wherein the center point of the annular pin 32 has an angle of 5.2 ° from the center axis 10 relative to the center point of the next pin 32.

The fixation of the at least one carrier arm 3 at the central disc 11 can be achieved 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 is directly opposite, the support arm 3 is secured by a force-transmitting lock. The force-transmitting closure is realized in such a way that: the spring-loaded pin 32 arranged on the lever clamping device 30 is pressed against the central disc 11.

If the angular position is instead selected such that the at least one spring-loaded pin 32 and the at least one bore 33 are opposite, the support arm 3 is secured by a form-locking and force-locking. The form-locking is achieved by: the at least one spring-loaded pin 32 is positively locked with the at least one bore 33 in such a way that: the spring-loaded pin 32 is inserted into the bore 33, and the remaining spring-loaded pin 32 is pressed against the central disk 11 and a force-transmitting engagement is achieved.

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

In the embodiment with six spring-loaded pins 32, the support arm 3 is fixed in a purely force-transmitting manner (the angular position is selected such that the bore 33 and the pin 32 are not opposed) by: 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 lock is achieved between the carrier arm 3 and the central disk 11, which force-transmitting lock corresponds to at least six times the spring force. In addition to the force caused by the spring, a force-transmitting lock 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, in contrast, in this exemplary embodiment, the angular position is selected such that the spring-loaded pin 32 and the borehole 33 are directly opposite one another, the support arm 3 is secured by means of a form fit and a force fit. In the case of a force-transmitting 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 lock is achieved between the carrier arm 3 and the central disk 11, which force-transmitting lock corresponds to at least five times the spring force. In addition to the force caused by the spring, a force-transmitting lock 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, comprising a load receiving unit (2) and a support unit (4) which can be arranged at a lifting unit, wherein the load receiving unit (2) has at least one carrying arm (3), wherein the at least one carrying arm (3) can be pivoted about a central axis (10), characterized in that 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), wherein the at least one carrying arm (3) is connected to a lever clamping device (30) and can be fixed to the central disk (11) by means of the lever clamping device (30) such that the at least one carrying arm (3) can no longer be moved, wherein an edge (12) of the central disk (11) which is configured as a guide edge is surrounded not only by the at least one carrying arm (3) but also by the lever clamping device (30).

2. Hoisting device (1) according to claim 1, characterized in that the lever clamping device (30) has 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) can sink completely into the deepening of the lever clamping device (30) against the spring force.

4. A hoisting device (1) as claimed in claim 2 or 3, characterized in that the central disc (11) has a bore (33), the bore (33) having an inner diameter corresponding to the outer diameter of the spring-loaded pin (32), so that a form-locking between the spring-loaded pin (32) and the bore (33) can take place.

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

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

7. A lifting device (1) according to any one of claims 1-3, 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 screw thread (36).

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

9. Method for securing at least one carrier arm (3) of a lifting device (1) according to any one of claims 1 to 8, wherein the lever clamping device (30) has at least two spring-loaded pins (32) on the side facing the central disk (11), characterized in that the securing of the at least one carrier arm (3) is effected by a force-transmitting lock, wherein at least one spring-loaded pin (32) located at the lever clamping device (30) is pressed against the central disk (11).

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