WO2014043933A1

WO2014043933A1 - Supporting device and cranes

Info

Publication number: WO2014043933A1
Application number: PCT/CN2012/082042
Authority: WO
Inventors: 詹纯新; 刘权; 罗贤智
Original assignee: 中联重科股份有限公司; 湖南中联重科专用车有限责任公司
Priority date: 2012-09-18
Filing date: 2012-09-26
Publication date: 2014-03-27
Also published as: CN102826466B; CN102826466A

Abstract

Disclosed are a supporting device and cranes comprising the supporting device. The supporting device comprises a lower supporting base (20), an upper supporting base (10), and an elastic element (30), wherein the lower supporting base (20) comprises a supporting portion (21); the upper supporting base (10) is movably supported on the lower supporting base (20); and one end of the elastic element (30) is connected to the supporting portion (21) and the other end of the elastic element (30) is connected to the upper supporting base (10). In the present invention the upper supporting base is movably supported on the lower supporting base, when both forces in a vertical and horizontal direction are applied to a part to be supported due to a flexural deformation, the upper supporting base is pushed to horizontally move relative to the lower supporting base under the action of the force in the horizontal direction such that the part to be supported returns to a state in which the part to be supported is only subjected to the force in the vertical direction, so that the part to be supported can no longer generate flexural deformation and the service life of the part to be supported is prolonged.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of cranes, and more particularly to a support device and a crane. BACKGROUND OF THE INVENTION Engineering mechanisms (e.g., cranes) of the prior art have legs and the like, and in use, it is necessary to mount a supporting device on the legs. Wherein one end of the leg is connected to the frame of the crane, the other end is provided with a vertical cylinder, and a support device is installed at the free end of the vertical cylinder. When the legs need to be supported, the vertical cylinder is driven to move downwards to support the entire frame to the ground through the support device. As shown in FIG. 1 to FIG. 2, the front end of the piston rod of the vertical cylinder 80 of the leg of the crane is a hemispherical head, and the supporting device 100 is provided with a groove matching the hemispherical head for receiving from the vertical cylinder 80. Positive pressure. The pressure plate 70 is pressed against the support device 100 by being pressed against the hemispherical head by the bolt 120. At the same time, the pressure plate 70 is provided with a pin hole through which the plug pin 110 passes to prevent the vertical cylinder 80 from coming out of the groove. When the crane hoists heavy loads, its legs will inevitably produce flexural deformation, so the vertical cylinder will produce corresponding displacement. Since the hemispherical head of the vertical cylinder is caught in the groove of the supporting device, one end of the hemispherical head cannot be freely slipped. This causes the vertical cylinder 80 to withstand a large radial load in addition to the vertical load, which easily causes damage to the vertical cylinder. In addition, under the action of radial force and flexural deformation, the hemispherical head of the vertical cylinder 80 may damage the latch 110, causing the hemispherical head to directly escape from the recess, thereby causing a safety accident. SUMMARY OF THE INVENTION The present invention is directed to a support device and a crane to solve the problem that the support device of the prior art easily damages a vertical cylinder. In order to solve the above technical problem, according to a first aspect of the present invention, a support device is provided, comprising: a lower support, the lower support includes a support portion; an upper support, the upper support is movably supported on the lower support; The elastic member has one end connected to the support portion and the other end of the elastic member connected to the upper support. Further, the lower support includes a first opening, the upper support includes a seat body and a fixing post protrudingly disposed below the seat body; the free end of the fixing post passes through the first opening and is movable in a region defined by the first opening . Further, a finite portion is provided on the lower support or the upper support. Further, the support device further includes a stopper and a fastener disposed at a free end of the fixing post of the upper support, and the upper support is coupled to the lower support by the stopper and the fastener. Further, the elastic member is a disc spring. Further, the supporting device comprises a plurality of elastic elements, the plurality of elastic elements being tension springs or compression springs, the tension springs or compression springs surrounding the fixing columns of the upper support and horizontally arranged along the radial direction of the fixing columns. Further, the lower support includes a base and a fixed barrel connected to the base, and the side wall of the fixed barrel forms a support portion. Further, the fixed cylinder comprises a bottom of the cylinder and a second opening opposite to the bottom of the cylinder, and the bottom of the cylinder is provided with a first opening, and the free end of the fixing column sequentially passes through the second opening and the first opening. Further, the base includes a receiving cavity, at least a portion of the fixing cylinder is disposed in the receiving cavity, and the fixing cylinder is connected to the circumferential side wall of the receiving cavity by a bolt. Further, the first opening is a waist hole or a round hole. According to a second aspect of the invention, there is provided a crane comprising a leg and a support device coupled to a vertical cylinder of the leg, the support device being the support device described above. The upper support in the present invention is movably supported on the lower support. When the support member is subjected to the vertical force and the horizontal force due to the flexural deformation, the upper support is pushed by the horizontal force. The seat is horizontally moved relative to the lower support to return the support member to a state of only the vertical force, so that the support member is no longer flexed and deformed, and the service life of the support member is prolonged. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in FIG. In the drawings: Fig. 1 is a schematic view showing the connection of a vertical cylinder and a supporting device in the prior art; Fig. 2 is a schematic plan view showing a prior art supporting device; Fig. 3 is a schematic view A schematic view of the connection of the vertical cylinder and the supporting device in the present invention; FIG. 4 schematically shows a plan view of the supporting device in the present invention; and FIG. 5 schematically shows a partial cross-sectional view of the supporting device when the pressing plate is not mounted. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention are described in detail below with reference to the accompanying drawings. As a first aspect of the invention, there is provided a support device for supporting a leg of a crane, in particular a vertical cylinder connected to a leg of a crane. Of course, the support device can also be used to support other to-be-supported members that are subject to flexural deformation. As shown in Figures 3 to 5, the support device comprises: a lower support 20, an upper support 10 and an elastic member 30. Wherein, the lower support 20 includes a support portion 21; the upper support 10 is movably supported on the lower support 20. One end of the elastic member 30 is connected to the side wall of the support portion 21, and the other end of the elastic member 30 is connected to the upper holder 10. Preferably, the support portion 21 can be designed as a cavity in which the elastic element 30 is mounted. In use, the support device of the present invention is coupled to a member to be supported (e.g., a vertical cylinder of a leg of a crane). When the upper support 10 is moved from the initial position, the resilient member 30 provides an upper support for the upper support 10. 10 Reverts to the initial position. Since the upper support 10 is movably supported on the lower support 20, when the support member is subjected to the vertical force and the horizontal force due to the flexural deformation, the force is pushed by the horizontal force. The support 10 is horizontally moved relative to the lower support 20 to return the support member to a state of only the vertical force, so that the support member is no longer flexed and deformed, and the service life of the support member is prolonged. When the force of the member to be supported is no longer received, the upper support 10 returns to the initial position under the action of the above-mentioned restoring force, which is very convenient to use. Preferably, the lower support 20 includes a first opening 232, and the upper support 10 includes a base 11 and a fixing post 12 protrudingly disposed below the base 11. In particular, the base 11 is provided with a support recess 13; The free end passes through the first opening 232 and is movable within the area defined by the first opening 232. Preferably, the first opening 232 is a waist hole or a circular hole, wherein the waist hole can be used to move the upper support 10 only in the extending direction of the waist hole within the range defined by the waist hole, and the round hole is used. The upper support 10 can then be moved in any direction. Preferably, the lower seat 20 or the upper support 10 is provided with a limiting portion 111. Preferably, the limiting portion 111 can be disposed on the base 11 and protrude downward. When the upper support 10 is moved to make the limiting portion 111 and the edge of the cylinder of the lower support 20 interfere, the upper support 10 can be defined. The range of movement in the horizontal direction prevents the upper holder 10 from coming off the lower holder 20. In particular, the position of the limiting portion 111 corresponds to the movable range of the first opening 232, such that when the upper support 10 moves to the extreme position of the first opening 232, the limiting portion 111 moves to the limit accordingly. Bit position. Preferably, the support device further includes a stop 50 and a fastener 40 disposed at a free end of the fixed post 12 of the upper support 10, the upper support 10 passing through the stop 50 and the fastener 40 is connected to the lower support 20. For example, the fastener 40 can be a nut. The use of fasteners 40 (especially nuts) to mount the stop 50 to the free end of the fixed post 12 of the upper support 10 limits the movement of the upper support 10 in the vertical direction. Preferably, a sleeve 14 is also provided between the resilient member 30 and the stop 50, which can be used to define the distance between the resilient member 30 and the stop 50. Preferably, the resilient element 30 is a disc spring. In particular, it is sleeved on the fixed post 12 of the upper support 10. In an embodiment not shown, the support device comprises a plurality of elastic elements 30, which are tension springs or compression springs, around which the tension springs or compression springs surround the fixed posts 12 of the upper support 10 and along the fixed posts 12 Radial level setting. In particular, the tension spring or compression spring can be arranged radially so as to provide a uniform restoring force to the upper support in all directions in the circumferential direction. Preferably, the lower holder 20 includes a base 22 and a fixed barrel 23 connected to the base 22, and the side wall of the fixed barrel 23 forms a support portion 21. In particular, as shown in FIG. 3, the circumferential side wall 221 of the base 22 encloses a cylindrical body. The inside of the cylindrical body is provided with a positioning plate 222, and the positioning plate 222 is provided with an opening for receiving the fixed cylinder 23. At the time of installation, the fixed cylinder 23 is inserted into the opening of the positioning plate 222 from the opening at the top of the cylinder, so that the fixing cylinder 23 can be positioned by the positioning plate 222 to prevent the fixed cylinder 23 from moving. In particular, the upper end of the cylinder is further provided with a support plate 223 having an opening, and the end of the fixed cylinder 23 is provided with a flange 233 that cooperates with the support plate 223. When assembled, the flange 233 of the fixed cylinder 23 is supported on the support plate 223 of the cylinder, and the upper support 10 is supported on the flange 233 of the fixed cylinder 23 and is slidable on the flange 233. Preferably, the base 22 includes a receiving cavity, at least a portion of the fixing cylinder 23 is disposed in the receiving cavity, the fixing cylinder

23 is connected to the circumferential side wall 221 of the receiving chamber by bolts 60. The bolt 60 is disposed in the radial direction of the circumferential side wall 221, on the one hand, the fixing cylinder can be conveniently assembled with the cylinder of the base 22, and on the other hand, when the bolt 60 is disposed on the top end surface of the cylinder, Not conducive to the problem of sliding the upper support. Preferably, the fixing cylinder 23 includes a cylinder bottom 231 and a second opening opposite to the cylinder bottom 231. The cylinder bottom 231 is provided with a first opening 232, and the cylinder bottom 231 is provided with a first opening 232, and the free end of the fixing column 12 The second opening and the first opening 232 are sequentially passed through. When it is necessary to disassemble or carry it, the upper support 10, the lower support 20 and the elastic member 30 can be disassembled by the bolts 60 and the fasteners 40, thereby reducing the weight of the individual parts and bringing great convenience to the handling. Preferably, the supporting device further comprises a pressure plate 70, and both ends of the pressure plate 70 are detachably connected to the upper support 10 by pins 61, respectively. As a second aspect of the present invention, there is provided a crane comprising a leg and a supporting device connected to the vertical cylinder 80 of the leg, the supporting device being the supporting device in each of the above embodiments. Wherein, the end of the vertical cylinder 80 is disposed at the support recess 13 of the supporting device, and the end of the vertical cylinder 80 can be caught in the supporting recess 13 of the supporting device by the pressing plate 70 and the pin 71 to prevent it from coming out. When it is necessary to take out the end of the vertical cylinder 80 from the support recess 13, the pin 71 of either end of the pressure plate 70 needs to be pulled out, and the pressure plate 70 can be rotated around the other undrawn pin 71. Thereby, the end of the vertical cylinder 80 is separated from the support recess 13. When the vertical cylinder is subjected to the vertical force and the horizontal force due to the flexural deformation, under the force of the horizontal direction, the upper support 10 is pushed horizontally relative to the lower support 20 to restore the vertical cylinder. The state of the force only in the vertical direction, so that the vertical cylinder no longer undergoes flexural deformation, thereby prolonging the service life of the vertical cylinder, and effectively avoiding the problem that the vertical cylinder is damaged by the horizontal force. Further, the force applied to the pressure plate 70 is also released, and the problem that the end portion of the vertical cylinder is disengaged from the supporting device due to excessive deformation or damage of the pressure plate 70 is avoided, thereby improving the safety of the device. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A support device, comprising:

a lower support (20), the lower support (20) includes a support portion (21);

An upper support (10), the upper support (10) is movably supported on the lower support (20); an elastic member (30), one end of the elastic member (30) and the support portion ( 21) The other end of the elastic member (30) is connected to the upper support (10).

2. The support device according to claim 1, wherein the lower support (20) comprises a first opening (232), the upper support (10) comprises a seat body (11) and a protruding arrangement a fixing post (12) below the seat body (11); a free end of the fixing post (12) passes through the first opening (232) and is defined by the first opening (232) Movement within the area.

The support device according to claim 2, characterized in that the lower support (20) or the upper support (10) is provided with a limit portion (111).

4. The support device according to claim 2, wherein the support device further comprises a stopper (50) and a fastener (40), the stopper (50) and the fastener (40) Provided at a free end of the fixed post (12) of the upper support (10), the upper support (10) passing through the stop (50) and the fastener (40) and the lower The support (20) is connected.

The support device according to any one of claims 2 to 4, characterized in that the elastic member (30) is a disc spring.

The support device according to any one of claims 2 to 4, wherein the support device comprises a plurality of the elastic members (30), and the plurality of elastic members (30) are tension springs or a compression spring, the tension spring or compression spring surrounding the fixing post (12) of the upper support (10) and horizontally disposed along a radial direction of the fixing post (12).

The support device according to any one of claims 2 to 4, characterized in that the lower support (20) comprises a base (22) and a fixed cylinder connected to the base (22) ( 23), the side wall of the fixing cylinder (23) forms the support portion (21).

8. The support device according to claim 7, wherein the fixing cylinder (23) comprises a cylinder bottom (231) and a second opening opposite to the cylinder bottom (231), the cylinder bottom ( 231) is provided with the said An opening (232), the free end of the fixing post (12) sequentially passes through the second opening and the first opening (232).

9. The support device according to claim 7, wherein the base (22) includes a receiving cavity, at least a portion of the fixed cylinder (23) is disposed in the receiving cavity, the fixed cylinder ( 23) is connected to the circumferential side wall (221) of the accommodating chamber by a bolt (60).

The support device according to any one of claims 2 to 4, wherein the first opening (232) is a waist hole or a round hole.

A crane comprising a support leg and a support device connected to a vertical cylinder (80) of the leg, wherein the support device is the support device according to any one of claims 1 to 10.