Lifting device and suspended DR system

Abstract

According to the lifting device and the suspension DR system, the lifting device comprises a base, a rolling wheel assembly and a first safety protection assembly, a rolling wheel rotates to wind or release two first winding ropes, a first pawl piece in the first safety protection assembly comprises a first pawl part used for being matched with a ratchet wheel, and a first abutting piece is rotatably connected to the first pawl piece; two first abutting parts in the first abutting piece are located on the two sides of the rotating axis, the first abutting parts are matched with the corresponding first winding ropes to keep the first pawl parts and the ratchet wheel spaced, and the first elastic piece can apply elastic force to the first pawl piece to enable the first pawl parts to rotate towards the ratchet wheel; after any first winding rope is broken, the first pawl piece can rotate relative to the base under the action of the first elastic piece, so that the first pawl part is matched with the ratchet wheel, rotation of the winding wheel is limited, and the problems that equipment falls and personnel are injured due to the fact that the first winding rope is broken can be effectively solved; and the reliability and the safety of the whole lifting device and the suspended DR system can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of radiological diagnostic equipment, and in particular to a lifting device and a suspended DR system. Background Art

[0002] The DR system is a direct digital X-ray photography system that mainly uses the penetrating principle of X-rays to form images due to the different densities of human tissues when passing through the human body. It is a traditional and inexpensive medical imaging device.

[0003] The DR system is divided into suspended DR and column DR according to the frame structure. The existing suspended DR has the advantage of multiple degrees of freedom and can meet the needs of multi-position shooting, and the demand is gradually increasing. The suspended DR includes a frame, a bullhead assembly, and a telescopic part connected between the frame and the bullhead assembly. A lifting device is provided in the frame, and the lifting device is connected to the telescopic part to drive the telescopic part to lift and lower the bullhead assembly. The lifting device generally adopts a reel and wire rope structure. Excessive wear and other unexpected situations will cause the wire rope to break. If the wire rope breaks, it will cause the equipment to fall or even injure people, greatly reducing the reliability and safety of the lifting device and the entire suspended DR. Utility Model Content

[0004] The present application provides a lifting device and a suspended DR system to improve the reliability and safety of the lifting device and the entire suspended DR.

[0005] According to the first aspect, an embodiment provides a lifting device, including a base, a reel assembly and a first safety protection assembly, the reel assembly including a reel, a ratchet and two first winding ropes, the reel is fixedly connected to the ratchet, the first winding rope is fixed and wound on the reel, the first winding rope is used to connect with the telescopic member of the suspended DR system, and the reel can be rotated to wind or release the first winding rope; the first safety protection assembly includes: a first pawl member, rotatably assembled on the base, the first pawl member includes a first pawl portion for cooperating with the ratchet; a first abutment member, rotatably connected to the first pawl member, the first abutment member includes two first abutment portions connected on both sides of its rotation axis, the two first abutment portions correspond one-to-one to the two first winding ropes, and the first abutment portion cooperates with the corresponding first winding rope to keep the first pawl portion and the ratchet spaced apart; a first elastic member, connected between the base and the first pawl member, the first elastic member can apply an elastic force to the first pawl member to rotate the first pawl portion toward the ratchet.

[0006] In an optional embodiment, the first pawl member includes a first pawl connecting portion and a first abutment connecting portion, the first pawl portion is connected to the first pawl connecting portion, and the first abutment member is rotatably connected to the first abutment connecting portion; the first pawl connecting portion and the first abutment connecting portion are connected by a first bolt, and at least one of the first pawl connecting portion and the first abutment connecting portion is provided with a first long hole that cooperates with the first bolt.

[0007] In an optional embodiment, one end of the first pawl connection portion can be rotatably assembled on the base, the first pawl connection portion has the other end away from its rotation axis, and the first abutment connection portion is connected to the other end of the first pawl connection portion; the first elastic member acts on the first pawl connection portion to drive the first pawl connection portion to rotate toward the ratchet wheel after the first winding rope breaks.

[0008] In an optional embodiment, the first abutment portion includes a first abutment arm and a first guide sleeve, the first guide sleeve is rotatably assembled on the first abutment arm, and the first guide sleeve is in contact with the corresponding first winding rope so that the first guide sleeve can rotate with the movement of the first winding rope.

[0009] In an optional embodiment, the lifting device also includes a balancing assembly, which includes a balancer and a second winding rope, wherein the second winding rope is connected between the balancer and the reel, and the second winding rope is wound around the reel. Under the action of the balancer, the second winding rope is in a tensioned state.

[0010] In an optional embodiment, the lifting device also includes a second safety protection component, which includes a second pawl member, a second abutment member and a second elastic member; the second pawl member can be rotatably assembled on the base, the second pawl member includes a second pawl portion for cooperating with the ratchet, the second abutment member is connected to the second pawl member, and the second abutment member cooperates with the second winding rope to maintain the second pawl portion and the ratchet spaced apart; the second elastic member is connected between the base and the second pawl member or between the base and the second abutment member, and the second elastic member can apply an elastic force to the second pawl member or the second abutment member to rotate the second pawl portion toward the ratchet.

[0011] In an optional embodiment, the second abutment member is connected to the second pawl member via an abutment connector, the abutment connector and the second pawl member are connected via a second bolt, and at least one of the abutment connector and the second pawl member is provided with a second long hole matching the second bolt.

[0012] In an optional embodiment, the second pawl member includes a second pawl connecting portion and a second abutment connecting portion connected on both sides of its rotation axis, the second pawl portion is connected to the second pawl connecting portion, and the second abutment member is connected to the second abutment connecting portion; the second elastic member acts on the second abutment member or the second abutment connecting portion to drive the second pawl connecting portion to rotate toward the ratchet wheel after the second winding rope breaks.

[0013] In an optional embodiment, the second abutment member includes a second abutment arm and a second guide sleeve, the second guide sleeve is rotatably assembled on the second abutment arm, and the second guide sleeve is in contact with the second winding rope so that the second guide sleeve can rotate with the movement of the second winding rope.

[0014] According to the second aspect, an embodiment provides a suspended DR system, comprising a frame, a telescopic part, a bullhead assembly and a lifting device as described in any one of the above items, wherein the base is mounted on the frame, the bullhead assembly is mounted on the telescopic part, and the end of the first winding rope is connected to the telescopic part to drive the bullhead assembly to rise and fall.

[0015] According to the lifting device and the suspended DR system of the above-mentioned embodiment, the lifting device includes a base, a reel assembly and a first safety protection assembly. The two first winding ropes in the reel assembly are wound on the reel and connected to the reel. The reel can be rotated to wind or release the two first winding ropes. The first pawl member in the first safety protection assembly is rotatably assembled on the base. The first pawl member includes a first pawl portion for cooperating with the ratchet. The first abutment member is rotatably connected to the first pawl member. The two first abutment portions in the first abutment member are located on both sides of the rotation axis. The first abutment portion corresponds to the first winding rope one by one. The abutment portion cooperates with the corresponding first winding rope to maintain the distance between the first pawl portion and the ratchet, and the first elastic member can apply an elastic force to the first pawl member to rotate the first pawl portion toward the ratchet; in this way, when any first winding rope breaks, under the driving action of the first elastic member, the first abutment member rotates relative to the first pawl member, and the first pawl member rotates relative to the base, so that the first pawl portion cooperates with the ratchet, thereby limiting the rotation of the winding wheel, which can effectively avoid the problem of equipment falling and personal injury caused by the breakage of the first winding rope, and help to improve the reliability and safety of the entire lifting device and suspended DR system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a partial structure of a lifting device in an embodiment;

[0017] Figure 2 It is a partial structural schematic diagram of a lifting device in another embodiment.

[0018] In the figure: 100, base; 110, mounting seat; 200, reel assembly; 210, reel; 220, ratchet; 230, first winding rope; 300, first safety protection assembly; 310, first ratchet member; 311, first ratchet connecting portion; 312, first ratchet portion; 313, first abutting connecting portion; 3131, first long hole; 314, first bolt; 320, first abutting member; 321, first abutting portion; 3211, first abutting arm; 3212, first guide sleeve; 330, first elastic member; 410, balancer; 420, second winding rope; 500, second safety protection component; 510, second pawl member; 511, second pawl connecting portion; 513, second abutting connecting portion; 514, abutting connecting member; 5141, second long hole; 515, second bolt; 520, second abutting member; 521, second abutting arm; 522, second guide sleeve; 530, second elastic member. DETAILED DESCRIPTION

[0019] The present application is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0020] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations, and the operation steps involved in each embodiment can also be replaced or adjusted in a sequence in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing a certain embodiment and do not mean that the composition and / or sequence are necessary.

[0021] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0022] An embodiment of the present application provides a lifting device, which is used in a suspended DR system to drive the bull head assembly to rise and fall through a telescopic member, that is, the lifting device is used to achieve height adjustment of the bull head assembly.

[0023] The lifting device of the present application embodiment, please refer to Figure 1 and Figure 2 , including a base 100, a reel assembly 200 and a first safety protection assembly 300, the reel assembly 200 includes a reel 210, a ratchet 220 and two first winding ropes 230, the reel 210 is fixedly connected to the ratchet 220, the first winding rope 230 is fixed and wound on the reel 210, the first winding rope 230 is used to connect with a telescopic member (not shown in the figure) in the suspended DR system, the reel 210 can be driven by a motor (not shown in the figure) or other driving mechanism, during the rotation of the reel 210, the reel 210 can wind or release the first winding rope 230, thereby realizing the height adjustment of the telescopic end on the telescopic member.

[0024] The first safety protection component 300 is installed on the base 100, and the first safety protection component 300 includes a first pawl member 310, a first abutment member 320 and a first elastic member 330; the first pawl member 310 is rotatably assembled on the base 100, and the first pawl member 310 includes a first pawl portion 312 that cooperates with the ratchet 220; the first abutment member 320 is rotatably connected to the first pawl member 310, and the first abutment member 320 includes two first abutment portions 321 connected on both sides of its rotation axis, and the first abutment portion 321 and the first abutment member 330 are connected to each other. 20 is arranged at intervals, and the two first abutment portions 321 can both rotate around the rotation axis of the first abutment member 320, and the two first abutment portions 321 correspond to the two first winding ropes 230 one by one, and the first abutment portions 321 cooperate with the corresponding first winding ropes 230 to keep the first pawl portion 312 and the ratchet 220 spaced apart; the first elastic member 330 is connected between the base 100 and the first pawl member 310, and the first elastic member 330 can apply an elastic force to the first pawl member 310 to rotate the first pawl portion 312 toward the ratchet 220.

[0025] During normal operation of the lifting device, under the action of the telescopic member load, the two first winding ropes 230 are in a tensioned state, and the first winding rope 230 cooperates with the first abutment portion 321. The first winding rope 230 in a tensioned state can be overlapped on the first abutment portion 321, or the first abutment portion 321 can be overlapped on the first winding rope 230 in a tensioned state. The tensioned first winding rope 230 can exert a force on the first abutment portion 321 to overcome the elastic force exerted by the first elastic member 330 on the first pawl member 310, thereby keeping the first pawl portion 312 in a position spaced apart from the ratchet 220.

[0026] The first winding rope 230 can be a steel wire rope or a braided rope made of other non-metallic materials such as plastic materials. If any of the first winding ropes 230 breaks during long-term use, the first winding rope 230 loses its force on the first abutment portion 321. Under the action of the first elastic member 330, the first abutment portion 321 rotates relative to the first pawl member 310. The first pawl member 310 can drive the first pawl portion 312 to rotate toward the ratchet 220. The first pawl portion 312 cooperates with the ratchet 220 to limit the rotation of the reel 210, thereby avoiding the extension and retraction of the telescopic member, that is, avoiding the telescopic member and the bullhead assembly connected thereto from falling and causing injuries to personnel, which helps to improve the reliability and safety of the entire lifting device and the suspended DR system.

[0027] In one embodiment, please refer to Figure 1 and Figure 2 The reel 210 and the ratchet 220 are coaxially arranged, and the ratchet 220 is located on one side of the axial direction of the reel 210. The ratchet 220 is fixedly connected to the reel 210 to ensure that the reel 210 and the ratchet 220 rotate synchronously. The two first winding ropes 230 are arranged side by side in the axial direction of the reel 210, and the two first winding ropes 230 are respectively wound on the reel 210. The free ends of the two first winding ropes 230 are connected to the telescopic member, which helps to improve the stability of the bull head assembly during the lifting process.

[0028] In one embodiment, please continue to refer to Figure 1 and Figure 2 The base 100 is provided with a mounting seat 110, the mounting seat 110 and the ratchet 220 are located on the same side of the axial direction of the reel 210, the mounting seat 110 and the free end of the first winding rope 230 are located on both sides of the central axis of the reel 210, the first pawl member 310 is rotatably assembled on the mounting seat 110 through a bearing, the first pawl member 310 can rotate around the mounting seat 110, the first pawl member 310 crosses the ratchet 220 from above the ratchet 220 and extends to the first On the side where the winding rope 230 is located; the first pawl portion 312 is located on the same side as the mounting seat 110 in the axial direction of the winding wheel 210, so as to facilitate the cooperation between the first pawl portion 312 and the ratchet 220, and the first pawl member 310 is generally arranged in an L shape, and the rotation axis of the first pawl member 310 is located at one end of the first pawl member 310, and the first abutment member 320 is located at the other end of the first pawl member 310, so as to facilitate the cooperation between the first abutment member 320 and the first winding rope 230.

[0029] In one embodiment, the first abutment member 320 is generally arranged in a straight line, and the first abutment member 320 is rotatably assembled on the first pawl member 310 through a rotating pin. The rotation axis of the first abutment member 320 coincides with the central axis of the rotating pin, and the rotating pin is located at the center of the straight line structure of the first abutment member 320. The two first abutment portions 321 are connected to both sides of the rotating pin in the extension direction of the first abutment member 320. The two first abutment portions 321 are respectively arranged in a straight line, and the extension directions of the two first abutment portions 321 are the same, so that the two first abutment portions 321 are conveniently connected to each other. 21 cooperates with two first winding ropes 230 arranged side by side. When the two first abutting portions 321 cooperate with the first winding ropes 230, the rotating pin is located between the two first winding ropes 230. In this way, when the two first abutting portions 321 cooperate with the corresponding first winding ropes 230, the first abutting member 320 and the first winding rope 230 can form a balanced state, and when any one of the first winding ropes 230 breaks, it can be ensured that the first abutting member 320 can rotate around the rotating pin, and then the entire first pawl member 310 can be rotated under the drive of the first elastic member 330.

[0030] In one embodiment, please continue to refer to Figure 1 and Figure 2 In order to reduce the friction between the first winding rope 230 and the first abutting portion 321 when releasing and winding, the first abutting portion 321 is provided to include a first abutting arm 3211 and a first guide sleeve 3212. The extension direction of the first abutting arm 3211 is perpendicular to the extension direction of the first winding rope 230, and the extension direction of the first abutting arm 3211 is also in the same direction as the extension direction of the first abutting member 320. The first guide sleeve 3212 is rotatably assembled on the first abutting arm 3211. One end of the first guide sleeve 3212 abuts against the rotating pin, and the other end abuts against the rotating pin. The retaining spring assembled on the first abutment arm 3211 abuts against the first guide sleeve 3212, thereby limiting the detachment of the first guide sleeve 3212 from the first abutment arm 3211, thereby ensuring that the first guide sleeve 3212 can only rotate around the first abutment arm 3211, and ensuring that the first winding rope 230 and the first guide sleeve 3212 are in rolling contact, which can effectively reduce the friction between the first abutment portion 321 and the first winding rope 230, thereby reducing the wear of the first winding rope 230 caused by the contact between the first abutment portion 321 and the first winding rope 230.

[0031] Of course, in other embodiments, the first abutment portion 321 may only include the first abutment arm 3211 , and the outer peripheral surface of the first abutment arm 3211 is a cylindrical surface, so as to avoid wear or breakage of the first winding rope 230 due to sharp edges on the first abutment portion 321 .

[0032] In one embodiment, please refer to Figure 1 and Figure 2The first pawl member 310 includes a first pawl connecting portion 311 and a first abutting connecting portion 313 corresponding to the two L-shaped parts respectively. The first pawl connecting portion 311 is rotatably matched with the mounting seat 110. The first pawl portion 312 is connected to the first pawl connecting portion 311, and the first pawl portion 312 and the first pawl connecting portion 311 are integrally formed. One end of the first abutting connecting portion 313 is connected to the first pawl connecting portion 311, and the other end is connected to the first abutting member 320.

[0033] The first pawl connection part 311 and the first abutting connection part 313 are connected by the first bolt 314 and the first long hole 3131. The position between the first pawl connection part 311 and the first abutting connection part 313 can be changed by adjusting the position of the first bolt 314 in the first long hole 3131, so as to adjust the distance between the first pawl part 312 and the ratchet 220. In this way, the first elastic member 330 with different elastic coefficients can be adapted to effectively avoid the first pawl part 312 and the ratchet 220 from accidentally touching each other, which can effectively prevent the lifting device from not working properly. In one embodiment, by adjusting the position of the first bolt 314 in the first long hole 3131, it is ensured that there is at least 10 mm of distance between the first pawl part 312 and the ratchet 220.

[0034] For example, in one embodiment, a first long hole 3131 is provided on the first abutting connection portion 313, and the first bolt 314 passes through the first long hole 3131 and is connected to the first pawl connection portion 311. The position of the first bolt 314 in the first long hole 3131 is changed to adjust the position of the first pawl portion 312 on the first pawl connection portion 311. Of course, in other embodiments, the long hole can also be provided on the first pawl connection portion 311, or the long holes cooperating with the first bolt 314 can be provided on both the first pawl connection portion 311 and the first abutting connection portion 313.

[0035] Alternatively, in other embodiments, a plurality of bolt holes may be provided on the first pawl connecting portion 311, and the distance between the first pawl portion 312 and the ratchet 220 may be adjusted by changing the position of the bolt hole that cooperates with the first bolt 314; or a plurality of bolt holes may be provided on the first abutting connecting portion 313; or a plurality of bolt holes that cooperate with the first bolt 314 may be provided on both the first pawl connecting portion 311 and the first abutting connecting portion 313.

[0036] For some examples, please refer to Figure 2 The first elastic member 330 may include a spring, which is a tension spring, or may be a rubber member with a good elastic coefficient; the first elastic member 330 may act on the first pawl connecting portion 311 to drive the first pawl portion 312 to rotate toward the ratchet 220 after the first winding rope 230 breaks.

[0037] In one embodiment, one end of the first elastic member 330 is connected to the mounting seat 110, and the other end is connected to the first pawl connection portion 311. The two ends of the first elastic member 330 are respectively matched with the pins on the mounting seat 110 and the first pawl connection portion 311 by hooking, so as to achieve the connection with the mounting seat 110 and the first pawl connection portion 311; or in another embodiment, the end of the first elastic member 330 connected to the mounting seat 110 can also be directly connected to the base 100; or the end of the first elastic member 330 connected to the first pawl connection portion 311 can also be connected to the first abutting connection portion 313. As long as the first elastic member 330 can drive the entire first pawl portion 312 to rotate toward the ratchet 220 after the first winding rope 230 breaks, and the first pawl portion 312 can be matched with the ratchet 220.

[0038] In one embodiment, please continue to refer to Figure 1 and Figure 2 The lifting device further includes a balancing assembly, which includes a balancer 410 and a second winding rope 420 mounted on the base 100, the second winding rope 420 being connected between the balancer 410 and the reel 210, the second winding rope 420 being wound on the reel 210, the winding direction of the second winding rope 420 being opposite to the winding direction of the first winding rope 230, the balancer 410 and the mounting base 110 being located on the same side of the rotation axis of the reel 210, so that the end of the first winding rope 230 away from the reel 210 and the end of the second winding rope 420 away from the reel 210 are located on both sides of the rotation axis of the reel 210. Under the action of the spring in the balancer 410, the balancer 410 can ensure that the second winding rope 420 between the reel 210 and the balancer 410 is always in a tensioned state.

[0039] The entire balancer 410 can be equivalent to a counterweight to ensure the stability of the free end of the first winding rope 230 in the lifting device during the lifting process. Of course, in other embodiments, in order to reduce the number of parts in the lifting device, the setting of the balance component can also be cancelled.

[0040] In some embodiments, for the lifting device with a balancing component, the lifting device is provided to further include a second safety protection component 500. Of course, if the structural strength of the second winding rope 420 is high enough, the second safety protection component 500 may not be provided.

[0041] For the embodiment with the second safety protection component 500, please refer to Figure 1The second safety protection component 500 includes a second pawl member 510, a second abutment member 520 and a second elastic member 530. The second pawl member 510 can be rotatably assembled on the mounting seat 110. The second pawl member 510 includes a second pawl portion that cooperates with the ratchet 220. The second abutment member 520 is connected to the second pawl member 510. The second abutment member 520 cooperates with the second winding rope 420 to keep the second pawl portion spaced apart from the ratchet 220. The second elastic member 530 can apply an elastic force to the second pawl member 510 to rotate the second pawl portion toward the ratchet 220.

[0042] Specifically, the second pawl member 510 is a strip structure with a certain curvature, the second pawl portion is located at one end of the second pawl member 510, and the other end of the second pawl member 510 can be connected to the second abutment member 520. The rotation axis of the second pawl member 510 is located between its two ends, which facilitates the cooperation between the second abutment member 520 and the second winding rope 420.

[0043] In one embodiment, please continue to refer to Figure 1 The second abutting member 520 is connected to the second pawl member 510 through the abutting connecting member 514. One end of the abutting connecting member 514 is fixedly connected to the second abutting member 520, and the other end is connected to the second pawl member 510. The abutting connecting member 514 is connected to the second pawl member 510 through a second bolt 515. The end of the abutting connecting member 514 is provided with a second long hole 5141 that matches the second bolt 515. The position of the second bolt 515 in the second long hole 5141 can be changed to adjust the distance between the second pawl portion on the second pawl member 510 and the ratchet 220. It can adapt to the second elastic member 530 with different elastic coefficients, effectively avoiding the second pawl portion from accidentally touching the ratchet 220 and causing the lifting device to fail to work normally. In one embodiment, the position of the second bolt 515 in the second long hole 5141 can be adjusted to ensure that there is at least 10 mm between the second pawl portion and the ratchet 220.

[0044] In other embodiments, a long hole cooperating with the second bolt 515 can be set on the second pawl member 510, or long holes cooperating with the second bolt 515 can be set on both the second pawl member 510 and the abutting connecting member 514, so as to increase the distance adjustment range between the second pawl portion and the ratchet 220.

[0045] Alternatively, a plurality of bolt holes cooperating with the second bolt 515 may be provided on the second pawl member 510 and / or the abutting connector 514 , so that the distance between the second pawl portion and the ratchet 220 can be adjusted by changing the positions of the bolt holes cooperating with the second bolt 515 .

[0046] For some examples, please refer to Figure 1The second pawl member 510 also includes a second pawl connecting portion 511 and a second abutting connecting portion 513 connected on both sides of its rotation axis. The second pawl portion is connected to the second pawl connecting portion 511, and the second pawl portion and the second pawl connecting portion 511 are integrally formed. The second abutting member 520 can be connected to the second abutting connecting portion 513 through the abutting connecting member 514. The second long hole 5141 can also be set on the second abutting connecting portion 513. The second elastic member 530 has the same structure as the first elastic member 330. One end of the second elastic member 530 can be connected to the mounting seat 110 or the base 100, and the other end can be connected to the second abutting connecting portion 513 or the abutting connecting member 514 or the second abutting member 520, so as to facilitate the rotation of the entire second pawl member 510 through the second elastic member 530 when the second winding rope 420 breaks, thereby making the second pawl portion cooperate with the ratchet 220.

[0047] Of course, in other embodiments, the other end of the second elastic member 530 can also be directly connected to the second pawl connecting portion 511, so that the second pawl portion can be driven to rotate toward the ratchet 220 after the second winding rope 420 breaks through the pulling force of the second elastic member 530 on the second pawl connecting portion 511.

[0048] For some embodiments, please continue to refer to Figure 1 The second abutment member 520 includes a second abutment arm 521 and a second guide sleeve 522. The second abutment arm 521 is fixed on the abutment connecting member 514. The extension direction of the second abutment arm 521 is perpendicular to the extension direction of the second winding rope 420. The second guide sleeve 522 is sleeved on the second abutment arm 521, and the second guide sleeve 522 can rotate relative to the second abutment arm 521. The second guide sleeve 522 is clamped on the second abutment arm 521 by a retaining spring to limit the second guide sleeve 522 from falling off the second abutment arm 521. The second guide sleeve 522 cooperates with the second winding rope 420, and the second winding rope 420 in a tensioned state can be overlapped on the second guide sleeve 522, or the second guide sleeve 522 can be overlapped on the second winding rope 420 in a tensioned state. The second winding rope 420 in a tensioned state can exert a force on the second guide sleeve 522, that is, on the entire second abutment member 520, so that the second abutment member 520 overcomes the elastic force of the second elastic member 530 on the second pawl member 510, thereby ensuring that the second pawl portion is spaced apart from the ratchet 220; in addition, the second guide sleeve 522 cooperates with the second winding rope 420, and the second guide sleeve 522 can rotate with the release and winding of the second winding rope 420, thereby reducing the friction between the second guide sleeve 522 and the second winding rope 420, and reducing the wear of the second abutment member 520 on the second winding rope 420.

[0049] Of course, in other embodiments, the second abutment member 520 may only include the second abutment arm 521, and the outer peripheral surface of the second abutment arm 521 is a cylindrical surface, which can reduce the wear of the second winding rope 420 due to sharp edges.

[0050] When the lifting device is in normal working condition, the second winding rope 420 cooperates with the second abutment 520, and the second pawl part and the ratchet 220 are arranged at intervals. If the second winding rope 420 breaks, the second winding rope 420 loses the force on the second abutment 520. Under the action of the second elastic member 530, the entire second pawl member 510 can rotate, thereby driving the second pawl part to rotate toward the ratchet 220. The second pawl part cooperates with the ratchet 220 to limit the rotation of the reel 210, thereby avoiding the extension and retraction of the telescopic member, and avoiding the unstable lifting and lowering of the telescopic member and the bullhead assembly connected thereto, which may cause injuries to people. This can ensure the stability of the entire lifting device, and also help to improve the reliability and safety of the entire lifting device and the suspension DR system.

[0051] An embodiment of the present application also provides a suspended DR system, including a frame (not shown in the figure), a telescopic part (not shown in the figure), a bullhead assembly (not shown in the figure) and the lifting device of any of the above embodiments, the base 100 is installed on the frame, the bullhead assembly is installed at the telescopic end of the telescopic part, and the free end of the first winding rope 230 is connected to the telescopic part to drive the bullhead assembly at the telescopic end to rise and fall.

[0052] The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, deformations or substitutions can be made based on the idea of ​​the present invention.

Claims

1. A lifting device, characterized in that: It comprises a base, a reel assembly and a first safety protection assembly, wherein the reel assembly comprises a reel, a ratchet and two first winding ropes, wherein the reel is fixedly connected to the ratchet, the first winding rope is fixed and wound on the reel, the first winding rope is used to be connected to a telescopic member for suspending a DR system, and the reel can be rotated to wind or release the first winding rope; The first safety protection component includes: A first pawl member, rotatably mounted on the base, the first pawl member comprising a first pawl portion for cooperating with the ratchet wheel; A first abutment member is rotatably connected to the first pawl member, the first abutment member includes two first abutment portions connected to two sides of its rotation axis, the two first abutment portions correspond to the two first winding ropes one by one, and the first abutment portions cooperate with the corresponding first winding ropes to maintain the interval between the first pawl portion and the ratchet wheel; The first elastic member is connected between the base and the first pawl member, and the first elastic member can apply an elastic force to the first pawl member to make the first pawl portion rotate toward the ratchet wheel.

2. The lifting device according to claim 1, characterized in that: The first pawl member includes a first pawl connecting portion and a first abutting connecting portion, the first pawl portion is connected to the first pawl connecting portion, and the first abutting member is rotatably connected to the first abutting connecting portion; The first pawl connecting portion and the first abutting connecting portion are connected by a first bolt, and at least one of the first pawl connecting portion and the first abutting connecting portion is provided with a first long hole matched with the first bolt.

3. The lifting device according to claim 2, characterized in that: One end of the first pawl connection portion can be rotatably assembled on the base, the first pawl connection portion has the other end away from its rotation axis, and the first abutment connection portion is connected to the other end of the first pawl connection portion; the first elastic member acts on the first pawl connection portion to drive the first pawl connection portion to rotate toward the ratchet wheel after the first winding rope breaks.

4. The lifting device according to claim 1, characterized in that: The first abutment portion includes a first abutment arm and a first guide sleeve, the first guide sleeve is rotatably assembled on the first abutment arm, and the first guide sleeve is in contact with the corresponding first winding rope so that the first guide sleeve can rotate with the movement of the first winding rope.

5. The lifting device according to any one of claims 1 to 4, characterized in that: The lifting device also includes a balancing assembly, which includes a balancer and a second winding rope, wherein the second winding rope is connected between the balancer and the reel, and the second winding rope is wound around the reel. Under the action of the balancer, the second winding rope is in a tensioned state.

6. The lifting device according to claim 5, characterized in that: The lifting device further comprises a second safety protection component, wherein the second safety protection component comprises a second pawl member, a second abutment member and a second elastic member; The second pawl member is rotatably mounted on the base, the second pawl member includes a second pawl portion for cooperating with the ratchet, the second abutment member is connected to the second pawl member, and the second abutment member cooperates with the second winding rope to keep the second pawl portion spaced apart from the ratchet; The second elastic member is connected between the base and the second pawl member or between the base and the second abutment member, and the second elastic member can apply an elastic force to the second pawl member or the second abutment member to make the second pawl portion rotate toward the ratchet wheel.

7. The lifting device according to claim 6, characterized in that: The second abutting member is connected to the second pawl member via an abutting connecting member, and the abutting connecting member and the second pawl member are connected via a second bolt, and at least one of the abutting connecting member and the second pawl member is provided with a second long hole matched with the second bolt.

8. The lifting device according to claim 6, characterized in that: The second pawl member includes a second pawl connecting portion and a second abutment connecting portion connected on both sides of its rotation axis, the second pawl portion is connected to the second pawl connecting portion, and the second abutment member is connected to the second abutment connecting portion; the second elastic member acts on the second abutment member or the second abutment connecting portion to drive the second pawl connecting portion to rotate toward the ratchet wheel after the second winding rope breaks.

9. The lifting device according to claim 6, characterized in that: The second abutment member includes a second abutment arm and a second guide sleeve, the second guide sleeve is rotatably mounted on the second abutment arm, and the second guide sleeve is in contact with the second winding rope so that the second guide sleeve can rotate with the movement of the second winding rope.

10. A suspended DR system, characterized in that: It comprises a frame, a telescopic part, a bullhead assembly and the lifting device described in any one of claims 1 to 9, wherein the base is mounted on the frame, the bullhead assembly is mounted on the telescopic part, and the end of the first winding rope is connected to the telescopic part to drive the bullhead assembly to rise and fall.

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