Lifting sleeping berth bed

Abstract

The lifting sleeping berth bed comprises a bed frame and connecting rod assemblies located at the two ends of the bed frame, each connecting rod assembly comprises an upper connecting rod assembly and a lower connecting rod assembly, the bottoms of the lower connecting rod assemblies are hinged to the bed frame, the tops of the lower connecting rod assemblies are hinged to a middle plate, and the lower connecting rod assemblies, the middle plate and the bed frame form a parallelogram four-connecting-rod structure; the bottom of the upper connecting rod assembly is hinged to the middle plate, the top of the upper connecting rod assembly is hinged to a support used for connecting a vehicle body, and the upper connecting rod assembly, the support and the middle plate form a parallelogram four-connecting-rod structure. According to the lifting bed, the upper connecting rod and the lower connecting rod are located on the same plane, the available length of the bed frame is guaranteed, in the lifting process, the space requirement in the width direction of the bed frame is small, the influence on a sleeper aisle is small, and stable lifting of the bed in a limited space is achieved.

Description

Technical Field

[0001] The invention relates to a vehicle sleeper bed, in particular to a lifting sleeper bed. Background Art

[0002] Currently, EMUs are usually equipped with fixed berths for passengers to sit and sleep. The fixed berths are made of bed plates welded with steel pipes, fastened to the car body with screws, and covered with mattresses. The space in the EMU sleeper car is limited, and the fixed installation cannot be flexibly adjusted to fully utilize the space.

[0003] The invention patent application with publication number CN 115742936 A discloses a RV hammock device and a RV, wherein the bed frame is connected to the roof through a swing frame, and the swing frame, bed frame, and roof form a parallelogram structure, and the swing frame swings forward around its upper end to a vertical state so that the hammock can be unfolded forward and downward, or rotated backward to close to the top of the car so that the hammock can be folded backward and upward; the swing frame is a hydraulic telescopic rod structure, which can adjust the height of the bed frame in the vertical direction. In the current solution, the bed frame is wide, and a large space is required in front and behind the car during the lifting process, which is not suitable for sleeper cars with limited front and rear distances. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to provide a lifting berth bed so as to achieve smooth lifting of the bed in a limited space.

[0005] Technical solution: The lifting berth bed described in the present invention includes a bed frame and connecting rod assemblies located at both ends of the bed frame, wherein the connecting rod assemblies include an upper connecting rod assembly and a lower connecting rod assembly, wherein the bottom of the lower connecting rod assembly is hinged to the bed frame, and the top is hinged to the middle plate, and the lower connecting rod assembly, the middle plate, and the bed frame form a parallelogram four-bar structure; the bottom of the upper connecting rod assembly is hinged to the middle plate, and the top is hinged to a bracket for connecting to a vehicle body, and the upper connecting rod assembly, the bracket, and the middle plate form a parallelogram four-bar structure.

[0006] Preferably, a synchronization plate is provided between the upper connecting rod assembly and the lower connecting rod assembly.

[0007] Preferably, the upper connecting rod assembly has a first connecting rod and a second connecting rod, and the first connecting rod, the second connecting rod and the synchronous plate are hinged by a first pin and a second pin, and the height of the first pin is greater than that of the second pin; the lower connecting rod assembly has a third connecting rod and a fourth connecting rod, and the third connecting rod, the fourth connecting rod and the synchronous plate are hinged by a third pin and a fourth pin, and the height of the third pin is lower than that of the fourth pin; the first connecting rod and the third connecting rod are connected by a synchronous plate.

[0008] Preferably, a first pin extends out from the bottom end of the first connecting rod to form a first extension portion, a third pin extends out from the top of the third connecting rod to form a second extension portion, and the first extension portion and the second extension portion are connected via a synchronization plate.

[0009] Preferably, a first concave portion is provided on one side of the synchronization plate, and when the bed frame is raised and folded, the first concave portion is used to avoid the first pin shaft; a second concave portion is provided on the other side of the synchronization plate, and when the bed frame is lowered and unfolded, the second concave portion is used to avoid the third pin shaft.

[0010] Preferably, the third connecting rod and the fourth connecting rod are bent at the top.

[0011] Preferably, the two ends of the synchronization plate are connected by a fifth pin, a sixth pin and the first connecting rod and a third connecting rod respectively. Taking the connecting line of the fifth pin and the third pin as a reference, the bed frame 1 is folded or unfolded, and the sixth pin is located on the same side of the reference line.

[0012] Preferably, there is a first synchronization rod between the supports at both ends of the bed frame, the first synchronization rod is rotatably connected to the support, the first synchronization rod and the second pin are coaxial, and the end of the first synchronization rod extending into the support is connected to the second connecting rod.

[0013] Preferably, levers are connected to both ends of the first synchronization rod, an elastic member is hinged on the bracket, the elastic member includes a sleeve and a shaft rod, the shaft rod is slidably connected to the sleeve, the lever and the shaft rod are hinged, and a spring is arranged between the shaft rod and the sleeve.

[0014] Preferably, a second synchronization rod is provided inside the bed frame, and the bottom end of the fourth connecting rod is connected to the second synchronization rod.

[0015] Beneficial effects: Compared with the prior art, the present invention has the following advantages: 1. The bed can be lifted and lowered smoothly in a limited space: the upper and lower connecting rods are located in the same plane to ensure the available length of the bed frame. During the lifting process, the space requirement in the width direction of the bed frame is small, and the impact on the berth aisle is small; 2. During the lifting process, the bed remains horizontal to ensure a smooth lifting process; 3. The lifting distance is large and the volume is small: the double four-link structure can effectively improve the lifting height. After folding, the length of the double four-link is not greater than the width of the bed. The overall volume is small and space is saved; 4. Simple operation: the bed frame can be lifted and lowered in one step. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the lifting berth bed of the present invention in an unfolded state;

[0017] Figure 2 This is a schematic diagram of the structure of the lifting berth bed of the present invention in a folded state;

[0018] Figure 3 A schematic diagram of the connecting rod connection relationship of the lifting berth bed of the present invention in the folded state;

[0019] Figure 4 A schematic diagram of the connecting rod connection relationship of the lifting berth bed of the present invention in the unfolded state;

[0020] Figure 5 A top view of the structure of the lifting berth bed of the present invention in the unfolded state

[0021] Figure 6 It is a side view of the structure of the lifting berth bed of the present invention in the unfolded state;

[0022] Figure 7 The present invention is a schematic diagram of the structure of a lifting berth bed frame. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0024] As shown in the figure, the lifting berth bed of the present invention is mainly composed of a bed frame 1 and a connecting rod assembly. There are two groups of connecting rod assemblies, which are respectively located at both ends of the bed frame 1 and symmetrically arranged on the left and right. Each group of connecting rod assemblies includes an upper connecting rod assembly 2 and a lower connecting rod assembly 3. In order to reduce the influence of the setting of the lifting mechanism on the length of the bed frame 1, the upper connecting rod assembly 2 and the lower connecting rod assembly 3 are connected by an intermediate plate 6. Specifically, the bottom of the lower connecting rod assembly 3 is hinged at the end of the bed frame 1, and the top is hinged to the lower side of the intermediate plate 6. The lower connecting rod assembly 3, the intermediate plate 6, and the bed frame 1 form a parallelogram four-bar structure. The bottom of the upper connecting rod assembly 2 is hinged to the upper side of the intermediate plate 6, and the top is connected to the internal fixed structure of the vehicle such as a wall or a roof through a bracket 5. The upper connecting rod assembly 2, the bracket 5, and the intermediate plate 6 form a parallelogram four-bar structure. By setting the intermediate plate 6, the upper and lower connecting rod assemblies are in the same plane to ensure the available length of the bed frame. The length of the middle plate 6 is smaller than the width of the bed frame 1 . When the bed frame is folded, the length of the upper and lower connecting rod assemblies is smaller than the width of the bed frame 1 , and the upper and lower connecting rod assemblies can be hidden at both ends of the bed frame 1 .

[0025] The upper connecting rod assembly 2 includes connecting rods 21 and 22. The two ends of the connecting rod 21 are respectively hinged to the support 5 and the middle plate 6 through the pin shaft I. The two ends of the connecting rod 22 are respectively hinged to the support 5 and the middle plate 6 through the pin shaft II. The two pin shafts I and the two pin shafts II form a parallelogram four-bar structure. When the connecting rods 21 and 22 rotate around the support 5, the middle plate 6 rises and falls. The pin shafts I and the pin shafts II are staggered in the height direction. The lower connecting rod assembly 3 includes connecting rods 31 and 32. Similarly, the two ends of the connecting rod 31 are respectively hinged to the support 5 and the middle plate 6 through the pin shaft III. The two ends of the connecting rod 32 are respectively hinged to the support 5 and the middle plate 6 through the pin shaft IV. The two pin shafts III and the two pin shafts IV form a parallelogram four-bar structure. The pin shafts III and the pin shafts IV are staggered in the height direction. The staggered direction of the pins I and II is opposite to the staggered direction of the pins II and IV. For example, the pin I at the top of the connecting rod 21 is higher than the pin II at the top of the connecting rod 22. Contrary to the upper connecting rod assembly 2, the pin III at the top of the connecting rod 31 is lower than the pin IV at the top of the connecting rod 32. This arrangement makes installation space for the synchronization structure between the upper connecting rod assembly 2 and the lower connecting rod assembly 3.

[0026] by Figure 3 Taking the left side in the middle as an example, the connecting rod 21 is located on the outside of the connecting rod 22, and the connecting rod 31 is located on the outside of the connecting rod 32. The specific setting of the synchronization structure is: the bottom end of the connecting rod 21 hinged to the middle plate 6 extends to the other side of the pin I to form a first extension part 211, and the top of the connecting rod 31 hinged to the middle plate 6 extends to the other side of the pin III to form a second extension part 311. The first extension part 211 and the second extension part 311 are passed through a synchronization plate 61, that is, the first extension part 211 and one end of the synchronization plate 61 are hinged by the pin V, and the second extension part 311 and the other end of the synchronization plate 61 are hinged by the pin VI. By setting the synchronization plate 61, the upper connecting rod assembly 2 and the lower connecting rod assembly 3 located on both sides of the middle plate 6 can move synchronously, and the bed frame remains stable during the lifting process.

[0027] A first concave portion is provided on one side of the synchronization plate 61. When the berth bed is in an upward folding state, the first concave portion is used to avoid the pin I at the bottom of the connecting rod 21. A second concave portion is provided on the other side of the synchronization plate 61. When the height of the berth bed is lowered when it is unfolded, the second concave portion is used to avoid the pin III at the top of the connecting rod 31. After the first concave portion and the second concave portion are set, the synchronization plate 6 is approximately Z-shaped.

[0028] The connecting rods 31 and 32 are bent at the top inside the pins III and IV to optimize the force and ensure the bearing performance of the connecting rods 31 and 32. At the same time, the bending is set so that when the berth bed is closed, the distance between the connecting rods 21 and 22 can be reduced as much as possible, so that the connecting rods 21 and 22 can overlap in the width direction. At the same time, the thickness of the bed frame 1 itself is similar to the thickness / height of the connecting rods 31 and 32 after folding, so as to reduce the thickness / height of the folded berth bed. With the connecting line of the top of the pin V and the connecting rod 31 and the hinge pin III of the middle plate 6 as the reference line, when the berth bed is unfolded or folded, the pin VI is located on the same side of the reference line to avoid the berth bed from getting stuck during the lifting process.

[0029] There is a synchronization rod 4 between the supports 5 at both ends of the bed frame. The synchronization rod 4 is rotatably connected to the supports 5. The synchronization rod 4 extends into the two ends of the supports 5 and is fixedly connected to the side of the connecting rod 22. Specifically, the synchronization rod 4 and the top pin II of the connecting rod 22 are coaxial. The two ends of the synchronization rod 4 are provided with a shaft 43 (not shown) with a polygonal cross section. The step member 41 is connected to the synchronization rod 4 through the shaft 43. The side of the connecting rod 22 is fixedly connected to the synchronization member 41. When the connecting rod 22 rotates around the pin, the synchronization rod 4 is driven to rotate through the synchronization member 41, and the rotation of one end of the bed frame 1 is transmitted to the other end of the bed frame 1, ensuring that the bed frame 1 will not be unbalanced during the up and down movement. The synchronization member 41 is a bent member to avoid the pin II.

[0030] A second synchronization rod 8 is provided inside the bed frame 1. The bottoms of the connecting rods 32 at both ends of the bed frame 1 are connected to the second synchronization rod 8 through a square shaft or a polygonal shaft. When the connecting rod 32 at one end rotates, the movement synchronization of the two ends of the bed frame 1 is achieved.

[0031] The two ends of the first synchronization rod 4 are also connected to the lever 42 through the shaft 43. The bracket 5 is hinged with an elastic member 7. The elastic member 7 includes a sleeve 71 and a shaft 72. There is a spring (not shown) between the shaft 72 and the sleeve. The shaft 72 can slide along the sleeve 71 to compress the spring. The lever 42 and the shaft 72 are hinged. When the first synchronization rod 4 rotates, the lever 42 is driven to rotate to compress or release the spring. The elastic member 7 overcomes the deadweight of the frame, which is convenient for manual lifting of the bed. During the lifting process of the berth bed, the stability is ensured. By setting the first synchronization rod 4 and the elastic member 7, the elastic member 7 is installed in the lateral direction of the bracket 5, which helps to reduce the thickness / height of the berth bed after folding, and avoids the elastic member affecting the folding of the upper connecting rod assembly 2 and the lower connecting rod assembly 3. A cover is provided on the bracket 5, and the cover shields the elastic member 7 and the top pin of the upper connecting rod assembly 2.

Claims

1. A lifting berth bed, characterized in that: The invention comprises a bed frame (1) and connecting rod assemblies located at both ends of the bed frame, wherein the connecting rod assemblies each comprise an upper connecting rod assembly (2) and a lower connecting rod assembly (3); the lower connecting rod assembly (3) is hinged to the bed frame (1) at the bottom and hinged to an intermediate plate (6) at the top; the lower connecting rod assembly (3), the intermediate plate (6) and the bed frame (1) form a parallelogram four-bar structure; the upper connecting rod assembly (2) is hinged to the intermediate plate (6) at the bottom and hinged to a bracket (5) for connecting to a vehicle body at the top; the upper connecting rod assembly (2), the bracket (5) and the intermediate plate (6) form a parallelogram four-bar structure.

2. The lifting berth bed according to claim 1, characterized in that: A synchronization plate (61) is provided between the upper connecting rod assembly (2) and the lower connecting rod assembly.

3. The lifting berth bed according to claim 2, characterized in that: The upper connecting rod assembly (2) comprises a first connecting rod (21) and a second connecting rod (22), wherein the first connecting rod (21), the second connecting rod (22) and a synchronous plate (61) are hingedly connected via a first pin shaft and a second pin shaft, wherein the height of the first pin shaft is greater than that of the second pin shaft; the lower connecting rod assembly (3) comprises a third connecting rod (31) and a fourth connecting rod (32), wherein the third connecting rod (31), the fourth connecting rod (32) and the synchronous plate (61) are hingedly connected via a third pin shaft and a fourth pin shaft, wherein the height of the third pin shaft is lower than that of the fourth pin shaft; and the first connecting rod (21) and the third connecting rod (31) are connected via the synchronous plate (61).

4. The lifting berth bed according to claim 3, characterized in that: A first pin extends out from the bottom end of the first connecting rod (21) to form a first extending portion (211), and a third pin extends out from the top end of the third connecting rod (31) to form a second extending portion (311). The first extending portion (211) and the second extending portion (311) are connected via a synchronous plate (61).

5. The lifting berth bed according to claim 3, characterized in that: A first concave portion is provided on one side of the synchronization plate (61), and when the bed frame is raised and folded, the first concave portion avoids the first pin shaft; a second concave portion is provided on the other side of the synchronization plate (61), and when the bed frame is lowered and unfolded, the second concave portion avoids the third pin shaft.

6. The lifting berth bed according to claim 3, characterized in that: The third connecting rod (31) and the fourth connecting rod (32) are bent at the top.

7. The lifting berth bed according to claim 6, characterized in that: The two ends of the synchronization plate (61) are respectively connected through a fifth pin shaft, a sixth pin shaft and a first connecting rod (21) and a third connecting rod (31). With the connecting line of the fifth pin shaft and the third pin shaft as a reference, the bed frame (1) is folded or unfolded, and the sixth pin shaft is located on the same side of the reference line.

8. The lifting berth bed according to claim 3, characterized in that: A first synchronization rod (4) is provided between the supports (5) at both ends of the bed frame. The first synchronization rod (4) and the support (5) are rotatably connected. The first synchronization rod (4) and the second pin are coaxial. The end of the first synchronization rod (4) extending into the support (5) is connected to the second connecting rod (22).

9. The lifting berth bed according to claim 8, characterized in that: The first synchronous rod (4) is connected to a lever (42) at both ends, and an elastic member (7) is hinged on the bracket (5). The elastic member (7) comprises a sleeve (71) and a shaft rod (72). The shaft rod (72) is slidably connected to the sleeve (71). The lever (42) and the shaft rod (72) are hinged, and a spring is provided between the shaft rod (72) and the sleeve (71).

10. The lifting berth bed according to claim 3, characterized in that: A second synchronization rod (8) is provided inside the bed frame (1), and the bottom end of the fourth connecting rod (32) is connected to the second synchronization rod (8).

Images