CN219567428U

CN219567428U - Lifting device and medical bed

Info

Publication number: CN219567428U
Application number: CN202222566383.1U
Authority: CN
Inventors: 黄建宾
Original assignee: Siemens Shanghai Medical Equipment Ltd
Current assignee: Siemens Shanghai Medical Equipment Ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2023-08-22
Anticipated expiration: 2032-09-27

Abstract

The present disclosure provides a lifting device comprising a base (10) and a lifting mechanism (30). The lifting mechanism comprises a first lifting arm, a first connecting rod (32), a second lifting arm (33) and a second connecting rod (34). One end of the first lifting arm is rotationally connected with the base around the first axis, and the other end of the first lifting arm is rotationally connected with the supported piece around the second axis. One end of the first connecting rod is rotationally connected with the base around a third axis. The second lifting arm is rotatably connected with the first lifting arm around the fourth axis, and one end of the second lifting arm is rotatably connected with the other end of the first connecting rod around the fifth axis. One end of the second connecting rod is rotationally connected with the other end of the second lifting arm around the sixth axis. The other end of the second connecting rod is rotatably connected with the supported piece around a seventh axis. The seven axes are parallel to each other, and the fourth axis is located between the first axis and the second axis and between the fifth axis and the sixth axis. The lifting device can lift the supported piece without a sliding rail. A medical bed comprising the lifting device is also provided.

Description

Lifting device and medical bed

Technical Field

The present disclosure relates to a lifting device, and more particularly, to a lifting device for a medical bed. The present disclosure also provides a medical bed having the above lifting device.

Background

CT (Computer Tomography), MR (Magnetic Resonance) and DR (digital radiography) require that the subject lie flat on the medical bed for scanning during the examination. Because of the need for the examinee to get up and down the medical bed, the bed body of the medical bed is generally required to have a lifting function.

The existing products on the market generally adopt the modes of parallelogram oblique pushing, single-shear oblique pushing, double-shear straight pushing, one-point five-shear straight pushing, single-shear flat pushing and the like, and due to the structural design and the mechanism movement requirement, all lifting seats of the scissor structures are provided with sliding rails, and the sliding rails have the problems of high cost, easy damage, periodic maintenance and the like.

Disclosure of Invention

The object of the present disclosure is to provide a lifting device capable of lifting a supported member without a slide rail.

Another object of the present disclosure is to provide a medical bed that can be lifted without a slide rail.

The present disclosure provides a lifting device comprising a base and a lifting mechanism. The lifting mechanism comprises a first lifting arm, a first connecting rod, a second lifting arm and a second connecting rod. One end of the first lifting arm is rotatably connected to the base about a first axis and the other end is rotatably connected to the supported member about a second axis. One end of the first link is rotatably connected to the base about a third axis. The second lift arm is rotatably connected to the first lift arm about a fourth axis. One end of the second lifting arm is rotatably connected to the other end of the first link about a fifth axis. One end of the second link is rotatably connected to the other end of the second lifting arm about a sixth axis. The other end of the second link is rotatably connected to the supported member about a seventh axis. The first axis, the second axis, the third axis, the fourth axis, the fifth axis, the sixth axis, and the seventh axis are parallel to each other, and the fourth axis is located between the first axis and the second axis and between the fifth axis and the sixth axis.

According to the lifting device, the first lifting arm, the first connecting rod, the second lifting arm and the second connecting rod rotate in a coordinated mode around the association of the axes, lifting of the supported piece is achieved under the condition that a sliding rail is not needed, expensive linear guide rails or guide grooves are omitted, and cost is saved.

In a further exemplary embodiment of the lifting device, the distance from the first axis to the third axis is equal to the distance from the second axis to the seventh axis. The distance from the third axis to the fifth axis is equal to the distance from the sixth axis to the seventh axis.

The fourth axis is a parallel line intermediate the sixth axis and the fifth axis and is a parallel line intermediate the first axis and the second axis. Thereby smoothly pushing the supported member up and down without tilting.

In a further exemplary embodiment of the lifting device, the lifting device further comprises a linear drive. The driving rod of the linear driver acts on the lifting mechanism or the supported piece to drive the supported piece to move through the action of the linear driver. Thereby being convenient for the lifting device to realize electric lifting.

In another exemplary embodiment of the lifting device, the linear drive is rotatably connected to the base by a first fixing pin. The rotation axis of the first fixing pin is parallel to the first axis.

In another exemplary embodiment of the lifting device, the first lifting arm is provided with two recesses. The two notches respectively abut against the first connecting rod and the second connecting rod when the supported piece moves to a descending end position along a first time needle direction so as to limit the supported piece to move along the first time needle direction. Therefore, the lifting device is convenient to stop at the descending end point, and the follow-up maintenance and other operations are convenient.

In another exemplary embodiment of the lifting device, the lifting device further comprises a first support and a second support. The first link is rotatably connected to the base through the first mount. The second link is rotatably connected to the supported member through a second mount. The first support is provided with a first abutment wall. The second support is provided with a second abutment wall. The first abutting wall and the second abutting wall respectively abut against the first connecting rod and the second connecting rod when the supported piece moves to a lifting end position along the reverse direction of the first time needle direction so as to limit the supported piece to continuously move along the reverse direction of the first time needle direction. Thereby preventing the lifting device from being unstable beyond a limit.

In another exemplary embodiment of the lifting device, the lifting device comprises two lifting mechanisms. Thereby facilitating stable lifting of the supported member.

In another exemplary embodiment of the lifting device, the two lifting mechanisms are connected by two first connecting plates, one second connecting plate and one supporting beam. Each first connecting plate is fixedly connected with two first lifting arms. The second connecting plate is fixedly connected with two second lifting arms. The support beam includes two pivot portions. Each rotating shaft part rotatably penetrates through a second lifting arm and a second connecting rod of the same lifting mechanism. Thereby improving the overall rigidity of the lifting device and being beneficial to stably lifting the supported piece.

In another exemplary embodiment of the lifting device, the lifting device further comprises a linear drive. The support beam is rotatably connected to the driving rod of the linear actuator by a second fixing pin. The rotation axis of the second fixing pin is parallel to the first axis. Thereby improving the overall rigidity of the lifting device and being beneficial to stably lifting the supported piece.

The present disclosure also provides a medical bed comprising one of the above lifting device and one of the bed bodies. The bed body comprises the supported piece. Through the first lifting arm, the first connecting rod, the second lifting arm and the second connecting rod in the lifting device, the first lifting arm, the second lifting arm and the second connecting rod are in associated coordination rotation around respective axes, lifting of the supported piece is achieved under the condition that a sliding rail is not needed, lifting of the bed body is achieved, expensive linear guide rails or guide grooves are omitted, and cost is saved.

Drawings

The following drawings are only illustrative of and explain the present disclosure and do not limit the scope of the present disclosure.

Fig. 1 is a block diagram of an exemplary embodiment of a lifting device.

Fig. 2 is a schematic sectional view for explaining the structure of the lifting device.

Fig. 3 is a schematic view for explaining movement of the lifting device to the descent finish position.

Fig. 4 is a schematic sectional view for explaining movement of the lifting device to the lifting end position.

Description of the reference numerals

10 base

11 first support

111 first abutment wall

21 second support

211 second abutment wall

30 lifting mechanism

31 first lifting arm

311 notch

32 first connecting rod

33 second lifting arm

34 second connecting rod

40 linear driver

41 first fixing pin

42 second fixing pin

51 first connecting plate

52 second connecting plate

53 supporting beam

531 shaft portion

600 bed body

610 supported piece

X1 first axis

X2 second axis

X3 third axis

X4 fourth axis

X5 fifth axis

X6 sixth axis

X7 seventh axis

S1 first time needle direction

Detailed Description

For a clearer understanding of technical features, objects, and effects, embodiments of the present disclosure will now be described with reference to the drawings, in which like reference numerals refer to identical or structurally similar but functionally identical components throughout the separate views.

In this document, "schematic" means "serving as an example, instance, or illustration," and any illustrations, embodiments described herein as "schematic" should not be construed as a more preferred or advantageous solution.

For simplicity of the drawing, only the portions relevant to the present disclosure are schematically shown in each drawing, which do not represent the actual structure thereof as a product.

Herein, "first", "second", etc. do not indicate the degree of importance or order thereof, etc., but merely indicate distinction from each other to facilitate description of documents.

Fig. 1 is a block diagram of an exemplary embodiment of a lifting device. As shown in fig. 1, the dotted line portion is a bed 600. The bed 600 includes a supported member 610, and the supported member 610 is supported by the lifting device, so that the bed 600 is lifted by the lifting device. In an exemplary embodiment, the medical bed may be used to support a subject in devices such as CT, MR, and DR. It will be appreciated by those skilled in the art that the bed 600 is not limited to a medical bed, and even to a bed, and that the disclosed bed includes all structures that can be supported for lifting by a lifting device.

As shown in fig. 1, the lifting device includes a base 10 and two lifting mechanisms 30. The base 10 may generally rest on the ground. Each lifting mechanism 30 comprises a first lifting arm 31, a first link 32, a second lifting arm 33 and a second link 34. The first elevating arm 31 has one end rotatably connected to the base 10 about a first axis X1 and the other end rotatably connected to the supported member 610 about a second axis X2. One end of the first link 32 is rotatably connected to the base 10 about a third axis X3. The second lifting arm 33 is rotatably connected to the first lifting arm 31 about a fourth axis X4. One end of the second elevating arm 33 is rotatably connected to the other end of the first link 32 about a fifth axis X5. One end of the second link 34 is rotatably connected to the other end of the second lift arm 33 about a sixth axis X6. The other end of the second link 34 is rotatably connected to the supported member 610 about a seventh axis X7. The first axis X1, the second axis X2, the third axis X3, the fourth axis X4, the fifth axis X5, the sixth axis X6 and the seventh axis X7 are parallel to each other, and the fourth axis X4 is located between the first axis X1 and the second axis X2 and between the fifth axis X5 and the sixth axis X6.

According to the lifting device provided by the disclosure, through the associated coordinated rotation of the first lifting arm 31, the first connecting rod 32, the second lifting arm 33 and the second connecting rod 34 around respective axes, the lifting of the supported piece 610 is realized without a sliding rail, so that an expensive linear guide rail or guide groove is omitted, and the cost is saved. And the first lifting arm 31 and the second lifting arm 33 intersect to be in a scissor structure, which is more stable than a parallelogram structure.

Although the lifting device includes two lifting mechanisms 30 in the above embodiment. Those skilled in the art will appreciate that the lifting device may have only one lifting mechanism 30, provided that the lifting mechanism 30 meets sufficient strength. In an exemplary embodiment, the first lifting arm 31, the first link 32, the second lifting arm 33, and the second link 34 of the lifting mechanism 30 may be up and down in the axial direction, and the lifting device may be configured to lift the supported member 610.

In an exemplary embodiment, when the lifting device includes one base 10 and two lifting mechanisms 30, in order to more smoothly push the supported member 610 up and down without tilting, the two lifting mechanisms 30 are connected by two first connection plates 51, one second connection plate 52 (shown in fig. 2), and one support beam 53. Each first connecting plate 51 is fixedly connected to two first lifting arms 31. The second connection plate 52 fixedly connects the two second lifting arms 33. The support beam 53 includes two shaft portions 531. Each of the rotating shaft portions 531 rotatably penetrates one of the second lifting arms 33 and one of the second links 34 of the same lifting mechanism 30.

The lifting device is not limited to having one lifting mechanism 30 or two lifting mechanisms 30, and may have three or more lifting mechanisms. When the lifting device has three or more lifting mechanisms, the adjacent two lifting mechanisms may be connected by two first connection plates 51, one second connection plate 52 (shown in fig. 2), and one support beam 53. Each first connecting plate 51 in the same adjacent two lifting mechanisms is fixedly connected with two adjacent first lifting arms 31. The second connecting plate 52 fixedly connects two adjacent second lifting arms 33. The support beam 53 includes two shaft portions 531. Each of the rotating shaft portions 531 rotatably penetrates one of the second lifting arms 33 and one of the second links 34 of the same lifting mechanism 30.

In an exemplary embodiment, the distance from the first axis X1 to the third axis X3 is equal to the distance from the second axis X2 to the seventh axis X7. The distance from the third axis X3 to the fifth axis X5 is equal to the distance from the sixth axis X6 to the seventh axis X7. The fourth axis X4 is a parallel line intermediate the sixth axis X6 and the fifth axis X5 and is a parallel line intermediate the first axis and the second axis X2. Thereby, the lifting mechanism 30 of the lifting device can smoothly push the supported piece 610 up and down without tilting.

Fig. 2 is a schematic sectional view for explaining the structure of the lifting device. Fig. 2 is a schematic sectional view of one shaft portion 531 of the support beam 53 in fig. 1 taken along a plane perpendicular to the first axis. As shown in fig. 2, the lifting device further comprises a linear actuator 40. The linear actuator 40 may be pneumatically, hydraulically or motor driven.

The linear actuator 40 is rotatably disposed on the base 10 by a first fixing pin 41, and the rotation axis of the first fixing pin 41 is parallel to the first axis. The linear actuator 40 includes a driving lever. The driving lever acts on the elevating mechanism 30 to drive the elevating mechanism 30 to move by the movement of the linear actuator 40 to drive the supported member 610 to elevate. In one exemplary embodiment, as shown in the partial cross-sectional view of the support beam 53 in fig. 2, a driving rod acts on the lifting mechanism by being connected to the support beam 53 to drive the supported member 610 to lift. The support beam 53 is rotatably connected to the driving rod of the linear actuator 40 by a second fixing pin 42, the rotation axis of the second fixing pin 42 being parallel to the first axis.

When the supported member 610 needs to be lifted, the driving rod extends to push the supporting beam 53, so as to drive the second connecting rod 34 to rotate around the seventh axis X7, thereby driving the second lifting arm 33 to move approximately towards the direction in which the driving rod extends, further driving the first lifting arm 31 to rotate around the first axis approximately towards the opposite direction of the first time needle direction S1, and simultaneously driving the first connecting rod 32 to rotate around the third axis X3 approximately towards the opposite direction of the first time needle direction S1, at this time, the supported member moves along the opposite direction of the first time needle direction S1, and the driving rod rotates around the rotation axis of the first fixing pin 41 along with the lifting of the supporting beam 53.

When the supported member 610 needs to be lowered, the driving rod retracts to pull the supporting beam 53, drives the second connecting rod 34 to rotate around the seventh axis X7, so as to drive the second lifting arm 33 to move approximately towards the retracting direction of the driving rod, further drives the first lifting arm 31 to rotate approximately towards the first time needle direction S1 around the first axis and drives the first connecting rod 32 to rotate approximately towards the first time needle direction S1 around the third axis X3, at this time, the supported member moves along the first time needle direction S1, and the driving rod rotates around the rotation axis of the first fixing pin 41 along with the lowering of the supporting beam 53.

In other exemplary embodiments, the driving rod of the linear driver 40 may be connected to the supported member, and directly drive the supported member 610 to be lifted by the driving rod.

Fig. 3 is a schematic view for explaining movement of the lifting device to the descent finish position. As shown in fig. 3, the first lifting arm 31 of the lifting device is provided with two notches 311. The two notches 311 abut against the first link 32 and the second link 34, respectively, to restrict the supported member 610 from continuing to move in the first time pin direction S1 when the supported member 610 moves in the first time pin direction S1 to a descent destination position.

When the lifting device is required to be stopped for maintenance or the like, the lifting device during lifting (the dotted line portion shown in fig. 3) is required to be lowered to the lowering end point (the solid line portion shown in fig. 3). The driving rod retracts to pull the supporting beam 53, drives the second connecting rod 34 to rotate around the seventh axis X7, so as to drive the second lifting arm 33 to move approximately towards the retracting direction of the driving rod, further drive the first lifting arm 31 to rotate around the first axis approximately towards the first time needle direction S1, and drive the first connecting rod 32 to rotate around the third axis X3 approximately towards the first time needle direction S1, at this time, the supported object moves along the first time needle direction S1, and the driving rod rotates around the rotation axis of the first fixing pin 41 along with the descending of the supporting beam 53. When the supported member 610 descends to the state that the first link 32 and the second link 34 are respectively restricted to the two recesses 311, the elevating means in the scissor structure is locked, and the supported member 610 reaches the descent finish point.

The number of the notches 311 for limiting the elevating device at the descent finish position is not limited to two, and the manner for limiting the elevating device at the descent finish position is not limited to the notches 311.

Fig. 4 is a schematic sectional view for explaining movement of the lifting device to the lifting end position. As shown in fig. 4, the lifting device further comprises a first support 11 and a second support 21. The first link 32 is rotatably connected to the base 10 through the first support 11. The second link 34 is rotatably connected to the supported member 610 through the second bracket 21. The first abutment 11 is provided with a first abutment wall 111. The second abutment 21 is provided with a second abutment wall 211. The first abutting wall 111 and the second abutting wall 211 abut against the first link 32 and the second link 34, respectively, to restrict the supported member 610 from continuing to move in the opposite direction of the first time pin direction S1 when the supported member 610 moves in the opposite direction of the first time pin direction S1 to one ascent destination position.

When the lifting device needs to lift the supported member 610 to the lifting end point (solid line portion shown in fig. 4), the driving rod of the lifting device in the use state (broken line portion shown in fig. 4) stretches out to push the supporting beam 53, so as to drive the second connecting rod 34 to rotate around the seventh axis X7, thereby driving the second lifting arm 33 to move approximately in the direction in which the driving rod stretches out, further driving the first lifting arm 31 to rotate around the first axis approximately in the opposite direction of the first time needle direction S1, and simultaneously driving the first connecting rod 32 to rotate around the third axis X3 approximately in the opposite direction of the first time needle direction S1, at this time, the supported member moves along the opposite direction of the first time needle direction S1, and the driving rod rotates around the rotation axis of the first fixing pin 41 along with the lifting of the supporting beam 53. When the first link 32 and the second link 34 are rotated to abut against the first abutting wall 111 and the second abutting wall 211, respectively, the rotational travel of the first link 32 and the second link 34 is restricted, and the supported member 610 reaches the ascending end point. The first abutment wall 111 and the second abutment wall 211 prevent the lifting device from being unstable beyond a limit.

The number of abutment walls for preventing the lifting device from being unstable at the ascent end position is not limited to two, nor is the manner for preventing the lifting device from being unstable at the ascent end position limited to the abutment walls.

The present disclosure also provides a medical bed comprising the lifting device and a bed body 600. The bed 600 includes the supported member 610 described above. By the associated coordinated rotation of the first lifting arm 31, the first connecting rod 32, the second lifting arm 33 and the second connecting rod 34 of the lifting device around the respective axes, the lifting of the supported piece 610 is realized without a sliding rail, so that the lifting of the bed body 600 is realized, an expensive linear guide rail or a guide groove is omitted, and the cost is saved.

It should be understood that although the present disclosure has been described in terms of various embodiments, not every embodiment is provided with a separate technical solution, and this description is for clarity only, and those skilled in the art should consider the disclosure as a whole, and the technical solutions in the various embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical examples of the present disclosure, they are not intended to limit the scope of the present disclosure, and all equivalent embodiments or modifications, such as combinations, divisions or repetitions of features, without departing from the spirit of the present disclosure should be included in the scope of the present disclosure.

Claims

1. A lifting device, comprising:

a base (10);

a lifting mechanism (30), the lifting mechanism (30) comprising:

a first lifting arm (31), one end of the first lifting arm (31) being rotatably connected to the base (10) about a first axis (X1) and the other end being rotatably connected to the supported member about a second axis (X2),

a first link (32), one end of said first link (32) being rotatably connected to said base (10) about a third axis (X3),

a second lifting arm (33), said second lifting arm (33) being rotatably connected to said first lifting arm (31) about a fourth axis (X4), one end of said second lifting arm (33) being rotatably connected to the other end of said first link (32) about a fifth axis (X5), and

-a second link (34), one end of the second link (34) being rotatably connected to the other end of the second lifting arm (33) about a sixth axis (X6), the other end of the second link (34) being rotatably connected to the supported member about a seventh axis (X7), the first axis (X1), the second axis (X2), the third axis (X3), the fourth axis (X4), the fifth axis (X5), the sixth axis (X6) and the seventh axis (X7) being parallel to each other, the fourth axis (X4) being located between the first axis (X1) and the second axis (X2) and between the fifth axis (X5) and the sixth axis (X6).

2. Lifting device according to claim 1, characterized in that the distance from the first axis (X1) to the third axis (X3) is equal to the distance from the second axis (X2) to the seventh axis (X7), the distance from the third axis (X3) to the fifth axis (X5) is equal to the distance from the sixth axis (X6) to the seventh axis (X7), the fourth axis (X4) is a parallel line intermediate the sixth axis (X6) and the fifth axis (X5) and is a parallel line intermediate the first axis (X1) and the second axis (X2).

3. A lifting device according to claim 1, characterized in that the lifting device further comprises a linear drive (40), the drive rod of the linear drive (40) acting on the lifting mechanism (30) or the supported element to drive the supported element in motion by the action of the linear drive (40).

4. A lifting device according to claim 3, characterized in that the linear drive (40) is rotatably connected to the base (10) by means of a first fixing pin (41), the rotation axis of the first fixing pin (41) being parallel to the first axis (X1).

5. Lifting device according to claim 1, wherein the first lifting arm (31) is provided with two notches (311), the two notches (311) respectively abutting against the first link (32) and the second link (34) to limit the supported member to continue to move in the first time needle direction (S1) when the supported member moves in the first time needle direction (S1) to a lowering end position.

6. Lifting device according to claim 5, characterized in that it further comprises a first abutment (11) and a second abutment (21), said first link (32) being rotatably connected to said base (10) by said first abutment (11), said second link (34) being rotatably connected to said supported by said second abutment (21), said first abutment (11) being provided with a first abutment wall (111), said second abutment (21) being provided with a second abutment wall (211), said first abutment wall (111) and said second abutment wall (211) respectively abutting said first link (32) and said second link (34) to limit the continued movement of said supported in the opposite direction of said first needle direction (S1) when said supported is moved in the opposite direction of said first needle direction (S1) to an ascending end position.

7. A lifting device according to claim 1, characterized in that the lifting device comprises two lifting mechanisms (30).

8. The lifting device according to claim 7, wherein two lifting mechanisms (30) are connected by two first connecting plates (51), one second connecting plate (52) and one supporting beam (53), each first connecting plate (51) is fixedly connected with two first lifting arms (31), the second connecting plate (52) is fixedly connected with two second lifting arms (33), the supporting beam (53) comprises two rotating shaft parts (531), and each rotating shaft part (531) is rotatably arranged on one second lifting arm (33) and one second connecting rod (34) of the same lifting mechanism (30) in a penetrating manner.

9. The lifting device according to claim 8, characterized in that the lifting device further comprises a linear drive (40), the support beam (53) being rotatably connected to the drive rod of the linear drive (40) by means of a second fixing pin (42), the axis of rotation of the second fixing pin (42) being parallel to the first axis (X1).

10. A medical bed, comprising:

a lifting device as claimed in any one of claims 1 to 9; and

a bed (600), said bed (600) comprising said supported member (610).