Device for assisting in the transport of baggage with a four-bar linkage

Abstract

The application discloses a device for assisting in carrying luggage with four connecting rod mechanisms, which comprises a carrying platform, a pair of screw driving assemblies, a pair of first crank connecting rod mechanisms and a pair of second crank connecting rod mechanisms symmetrically arranged on both sides of the carrying platform, wherein the screw driving assemblies are fixedly arranged on side plates, two fixed ends of the first and second crank connecting rod mechanisms are rotatably arranged on a bottom plate, output ends of the first and second crank connecting rod mechanisms are rotatably arranged on the carrying platform, a control end of the first crank connecting rod mechanism is rotatably connected with the screw driving assembly, the screw driving assembly is driven to rotate by an external drive, thereby driving the two pairs of four crank connecting rod mechanisms to control the carrying platform to move from the bottom plate to the space outside the bottom plate and the side plate to assist in carrying. The application utilizes the motion and output force of the two sets of driving systems as motion and force input to drive the device to complete the carrying of the luggage in view of the narrow space limitation near a high-speed rail luggage rack.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of daily necessities, in particular to a device for assisting in carrying luggage with four-bar linkage mechanism. BACKGROUND

[0002] The existing luggage rack auxiliary device for assisting in carrying luggage can solve the technical problem that it is difficult for the load platform to realize a large drop height without collision under the condition of narrow working space of high-speed rail luggage rack. The existing upper and lower limb multi-joint synchronous coordination training seat and robot mechanism cannot make the terminal drop a sufficient height in a small space, and the mechanism occupies a large space, and cannot be folded and stored. SUMMARY

[0003] The present application proposes a device for assisting in carrying luggage with four-bar linkage mechanism to solve the problems that the existing technology cannot meet the trajectory requirements of the limited working space of high-speed rail luggage rack and the mechanism is too complex. The device uses the motion and output force of two sets of driving systems as motion and force input to drive the device to complete the carrying of luggage.

[0004] The present application is realized by the following technical solutions:

[0005] The present application relates to a device for assisting in carrying luggage with four-bar linkage mechanism, comprising: a load platform and a pair of screw drive assemblies, a pair of first crank linkage mechanisms and a pair of second crank linkage mechanisms symmetrically arranged on both sides of the load platform, wherein: the screw drive assembly is fixedly arranged on the side plate, the two fixed ends of the first and second crank linkage mechanisms are rotatably arranged on the bottom plate, the output ends of the first and second crank linkage mechanisms are rotatably arranged on the load platform, the control end of the first crank linkage mechanism is rotatably connected with the screw drive assembly, the screw drive assembly is driven to rotate by an external drive, thereby driving the two pairs of four crank linkage mechanisms to control the load platform to move from the bottom plate to the space formed by the bottom plate and the side plate to assist in carrying.

[0006] TECHNICAL EFFECT

[0007] The present application converts the rotation of the motor into the translation of the slider through the crank slider mechanism and the ball screw mechanism, drives the connecting rod to rotate, and finally makes the load platform make reciprocating motion at the luggage rack and the luggage loading and unloading work point. The vertical ball screw is used for power supply to drive the four-bar linkage mechanism to move, and a certain distance is left between the screw and the driving rod, so that the load platform makes reciprocating motion at the luggage rack and the luggage loading and unloading work point, and a screw is added at the terminal to prolong the drop distance. Compared with the prior art, the present application can realize the curved motion of the load platform in the narrow space above the luggage rack, avoid collision with the fixed luggage rack, avoid the generation of dead point at the limit position, and ensure the safety and controllability of the whole process. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the present invention;

[0009] Figures 2-3 These are the front view and side view of the present invention, respectively;

[0010] Figures 4-6 These are schematic diagrams of the drive screw, telescopic rod, and U-shaped connector of the present invention.

[0011] Figures 7-9 These are schematic diagrams illustrating the working state of the embodiments;

[0012] In the figure: ball screw 1, rocker arm 2, straight rod 3a, 3b, folding rod 4a, 4b, crank 5a, 5b, telescopic rod 6a, 6b, crossbar 7, U-shaped connector 8, loading platform 9, base plate 10, side plate 11, screw drive assembly 12, first crank connecting rod mechanism 13, second crank connecting rod mechanism 14. Detailed Implementation

[0013] like Figures 1-3 As shown, this embodiment relates to a device for assisting in the handling of luggage with a four-bar linkage mechanism. The device includes: a loading platform 9 and a pair of lead screw drive assemblies, a pair of first crank-connecting rod mechanisms, and a pair of second crank-connecting rod mechanisms symmetrically arranged on both sides of the loading platform 9. The lead screw drive assembly 12 is fixedly mounted on the side plate 11. The four fixed ends a, b, c, and i of the first and second crank-connecting rod mechanisms 13 and 14 are rotatably mounted on the base plate 10. The output ends d and e of the first and second crank-connecting rod mechanisms 13 and 14 are rotatably mounted on the loading platform 9. The control end f of the first crank-connecting rod mechanism 13 is rotatably connected to the lead screw drive assembly 12. The connecting ends g and h of the first and second crank-connecting rod mechanisms 13 and 14 are rotatably connected to both ends of the crossbar 7. The lead screw drive assembly 12 rotates via external drive, thereby driving the two pairs of four crank-connecting rod mechanisms to move the loading platform 9 from the base plate 10 to the outside of the space formed by the base plate 10 and the side plate 11 to assist in handling.

[0014] The lead screw drive assembly 12 includes a ball screw 1 and a rocker arm 2 rotatably connected to its slider, wherein one end of the rocker arm 2 is rotatably connected to the slider, and the other end is rotatably connected to the control end f of the first crank-connecting rod mechanism 13.

[0015] The ball screw 1 is fixedly connected to the base plate 10 via foot support.

[0016] like Figure 3 and Figure 6As shown, the first crank connecting rod mechanism 13 comprises: first straight rod 3a, first folding rod 4a, first telescopic rod 6a, U-shaped connecting piece 8 connected with one end of first telescopic rod 6a, and first crank 5a rotationally connected with the middle part of first folding rod 4a, wherein: the middle part of first straight rod 3a is rotationally connected with screw drive assembly 12 as control end f, one end of first straight rod 3a is rotationally connected with base plate 10 at a end, one end of first folding rod 4a is rotationally connected with first straight rod 3a, and the other end is extended by first telescopic rod 6a, first telescopic rod 6a is fixedly connected with connecting piece 8, the middle part of first folding rod 4a is rotationally connected with first crank 5a, and one end of first crank 5a is rotationally connected with base plate at c end.

[0017] The crank 5 is a folding rod structure to prevent interference with the luggage rack during movement.

[0018] The telescopic rod mechanism comprises: telescopic rod 6 and ball screw arranged in the folding rod, wherein: telescopic rod 6 is embedded in folding rod 4 in the connecting rod mechanism, and the relative movement of telescopic rod 6 in the direction of the common rod is driven by the ball screw controlled by the DC motor.

[0019] As shown in Figure 1 and Figure 4 , the second crank connecting rod mechanism 14 comprises: second straight rod 3b, second folding rod 4b, second crank 5b and second telescopic rod 6b connected in turn, wherein: one end of second straight rod 3b is rotationally connected with the base plate, the other end is respectively rotationally connected with one end of cross rod 7 and second folding rod 4b, the middle part of second folding rod 4b is connected with one end of second crank 5b, the other end of second crank 5b is rotationally connected with the base plate at b end, second telescopic rod 6b is embedded in second folding rod 4b, and second telescopic rod 6b is rotationally connected with object carrying platform 9 at d end.

[0020] The cross rod 7 is connected with the first and second crank mechanisms 13 and 14 respectively, which is to make the movement of the two groups of crank mechanisms parallel, so as to ensure the level of the object carrying platform.

[0021] The four stress strain gauges evenly distributed in the object carrying platform 9 detect the weight of the placed luggage, and if it is greater than the limit, the alarm signal is started.

[0022] The luggage rack auxiliary device is further provided with a motor (not shown in the figure) connected with screw drive assembly 12, as shown in Figures 7-9 When the motor drives the ball screw 1 to rotate, the slider on the ball screw moves to drive the rocker 2 to rotate, and the rocker 2 causes the connecting rod mechanism rotationally connected to rotate clockwise, so that the object carrying platform connected at the end of the connecting rod mechanism is extended. The angular displacement sensor monitors that when the device reaches Figure 8When the shown pose, the motor at the ball screw 1 stops rotating, the motor in the telescopic rod mechanism drives the ball screw arranged in the folding rod to rotate, so that the load platform 9 is lowered, and the distance monitoring sensor is used to determine that the load platform 9 is stopped after being lowered to the lowest point, and at this time, it is the Figure 9 When the motor drives the ball screw 1 to rotate reversely, it is retracted to the highest point, and then the driving motor of the ball screw 1 is reversed, drives the connecting rod mechanism to rotate counterclockwise and is retracted to the bottom plate.

[0023] The ball screw and the rocker slider mechanism are used for driving in the application, the luggage case whose weight is not more than 20 kg can be lifted to the luggage rack and is lowered in a safe, stable and controllable manner, the structure is simple, and the operation efficiency is high.

[0024] The motion of the load platform is designed and controlled by the connecting rod connecting rod mechanism, the luggage case can move in the narrow space above the luggage rack without interference with the surrounding, bypasses the luggage rack plate, is safely and stably lowered to a position that can be carried by the user, the use experience of the user can be ensured on the premise of meeting the high-speed rail luggage storage requirement.

[0025] The above specific embodiments can be adjusted in different ways by those skilled in the art without departing from the principles and purposes of the application, the protection scope of the application is subject to the claims and is not limited by the above specific embodiments, and each implementation scheme in the scope is subject to the application.

Claims

1. A luggage rack assist device to assist in moving luggage, characterised in that, The luggage rack auxiliary device comprises a supporting platform and a pair of screw driving assemblies, a pair of first crank connecting rod mechanisms and a pair of second crank connecting rod mechanisms symmetrically arranged on both sides of the supporting platform, wherein the screw driving assemblies are fixedly arranged on the side plates, the fixed ends of the first and second crank connecting rod mechanisms are rotatably arranged on the bottom plate, the output ends of the first and second crank connecting rod mechanisms are rotatably arranged on the supporting platform, the control end of the first crank connecting rod mechanism is rotatably connected with the screw driving assembly, the connecting ends of the first and second crank connecting rod mechanisms are rotatably connected with the two ends of the cross bar, the screw driving assembly is driven to rotate by an external drive, thereby driving the two pairs of four crank connecting rod mechanisms to control the supporting platform to move from the bottom plate to the space formed by the bottom plate and the side plates to assist in carrying. The first crank connecting rod mechanism comprises a first straight rod, a first folding rod, a first telescopic rod, a U-shaped connecting piece connected with one end of the first telescopic rod and a first crank rotatably connected with the middle part of the first folding rod, wherein the middle part of the first straight rod is rotatably connected with the screw driving assembly as the control end, one end of the first straight rod is rotatably connected with the bottom plate, one end of the first folding rod is rotatably connected with the first straight rod, the other end is extended by the first telescopic rod, the first telescopic rod is fixedly connected with the connecting piece, the middle part of the first folding rod is rotatably connected with the first crank, and one end of the first crank is rotatably connected with the bottom plate. The luggage rack auxiliary device further comprises a ball screw arranged in the first folding rod, wherein the first telescopic rod is embedded in the first folding rod in the first crank connecting rod mechanism, and the ball screw is driven by a DC motor to drive the first telescopic rod to move in the direction of the common rod. The screw driving assembly comprises a ball screw and a rocker rotatably connected with the sliding block of the ball screw, wherein one end of the rocker is rotatably connected with the sliding block, and the other end is rotatably connected with the control end of the first crank connecting rod mechanism.

2. The luggage rack assist device for assisting in moving luggage according to claim 1, characterized by, The second crank connecting rod mechanism comprises a second straight rod, a second folding rod, a second crank and a second telescopic rod connected in sequence, wherein one end of the second straight rod is rotatably connected with the bottom plate, the other end is rotatably connected with one end of the cross bar and the second folding rod, the middle part of the second folding rod is connected with one end of the second crank, the other end of the second crank is rotatably connected with the bottom plate, and the second telescopic rod is embedded in the second folding rod and rotatably connected with the supporting platform.

3. A luggage rack assist device for assisting the carrying of luggage according to claim 2, characterized in that, The cross bar is connected with the first and second crank mechanisms to make the movements of the two groups of crank mechanisms parallel, thereby ensuring the horizontal of the supporting platform.

4. The luggage rack assist device for assisting in moving luggage according to claim 1, characterized by, The four stress strain gauges evenly distributed in the supporting platform detect the weight of the placed luggage, and if the weight is greater than the limit, an alarm signal is started.

5. The luggage rack assist device for assisting in moving luggage according to claim 1, wherein Further, a motor is connected with the screw driving assembly, when the motor drives the ball screw to rotate, the sliding block on the ball screw moves to drive the rocker to rotate, the rocker causes the first and second crank connecting rod mechanisms to rotate clockwise, and the supporting platform connected with the ends of the first and second crank connecting rod mechanisms extends out.

6. The luggage rack assist device for assisting in moving luggage according to claim 3, characterized by ​ When the angular displacement sensor triggers, the motor at the ball screw stops rotating, the DC motor drives the ball screw arranged in the first or second folding rod to rotate, so that the object platform is lowered, and the distance monitoring sensor is used to determine that the object platform stops after being lowered to the lowest point; when the motor drives the ball screw to rotate in the opposite direction, it is retracted to the highest point, and then the driving motor of the ball screw is reversed to drive the connecting rod mechanism to rotate counterclockwise and retract to the bottom plate.

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