Lifting mechanism and lifting device with same

Abstract

The utility model discloses a lifting mechanism. The lifting mechanism comprises a base frame; the driving assembly comprises a motor and a transmission wheel assembly; the lifting assembly comprises at least two connecting rods and at least two lead screws erected on the base frame in parallel, each lead screw is sleeved with a sliding piece, one end of each connecting rod is rotationally connected to the corresponding sliding piece, the other end of each connecting rod is used for being connected with a lifting platform, and the lead screws are connected through a transmission wheel assembly. The motor is connected with one of the lead screws so as to be matched with the transmission wheel assembly to synchronously drive all the lead screws to rotate, so that all the sliding pieces are driven to move left and right along the lead screws, and the connecting rods are promoted to drive the lifting platform to move up and down. The motor and the transmission wheel assembly are matched to drive the multiple lead screws to rotate synchronously, the lifting platform is actively driven to move up and down through the connecting rods rotationally connected with the sliding pieces, the effect of synchronous lifting of the multiple connecting rods is achieved, the torque of the motor is small, and the requirement for the motor can be lowered. The utility model further discloses a lifting device.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting structures, in particular to a lifting mechanism and a lifting device with the lifting mechanism. Background Art

[0002] A lifting mechanism is a mechanical structure used to lift objects. Most lifting mechanisms include a platform, a scissor-link telescopic assembly, and a drive structure for providing ascending or descending power. In order to maintain the stability of the platform during ascent or descent, a scissor-link telescopic assembly can be connected to each side of the lower surface of the platform. In existing lifting mechanisms, the lifting platform is directly driven by a drive mechanism, and the scissor-link telescopic assembly serves as a driven structure that follows the movement of the platform. At present, most drive structures use a structure in which a motor, a sprocket, and a rigid chain are synchronously driven. However, as the lifting distance increases, more chains are required to lift the platform to the target distance. Chain storage requires a large amount of space. During use, the weight borne by the sprocket and the torque required by the motor will increase, which is a great test for the strength of the motor and the sprocket. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide a lifting mechanism and a lifting device having the lifting mechanism, so as to achieve synchronous driving, reduce the volume of the lifting mechanism and reduce the load of the motor.

[0004] In order to solve the above technical problems, according to one aspect of the present invention, a lifting mechanism is provided, comprising:

[0005] scaffolding;

[0006] A drive assembly comprising a motor and a transmission wheel assembly;

[0007] The lifting assembly includes at least two connecting rods and at least two screw rods mounted in parallel on the base frame. A sliding member is sleeved on each of the screw rods. One end of each of the connecting rods is rotatably connected to the sliding member, and the other end is used to connect to the lifting platform. The screw rods are connected through the transmission wheel assembly. The motor is connected to one of the screw rods to cooperate with the transmission wheel assembly to synchronously drive all the screw rods to rotate, thereby driving all the sliding members to move left and right along the screw rods, prompting the connecting rods to drive the lifting platform to move up and down.

[0008] A further technical solution is as follows: the transmission wheel assembly includes at least two gears, one end of each screw rod is connected to a gear, and adjacent gears are meshed with each other.

[0009] Its further technical solution is: the number of the screw rods, the connecting rods and the sliding parts are all three, the three sliding parts are respectively sleeved on the three screw rods, and two of the three sliding parts are located on the same side, and the other sliding part is located on the other side, one end of the three connecting rods are respectively rotatably connected to the three sliding parts, and the adjacent connecting rods are staggered, the motor is connected to one of the screw rods, and one end of the three parallel screw rods are connected through the transmission wheel assembly.

[0010] Its further technical solution is: the number of the screw rod, the connecting rod and the sliding member is two, the two sliding members are respectively sleeved on the two screw rods, and are located on different sides, one end of the two connecting rods are respectively rotatably connected to the two sliding members, and the other ends are respectively used to connect to the middle or diagonal position of the opposite sides of the lifting platform, the motor is connected to one of the screw rods, and one ends of the two screw rods are connected through the transmission wheel assembly.

[0011] A further technical solution is as follows: the sliding member is a screw nut, the upper end of the screw nut is formed with a protruding connection portion, and one end of the connecting rod is rotatably connected to the connection portion.

[0012] Its further technical solution is: the base frame includes two oppositely arranged fixing rods, at least two accommodating grooves are respectively provided at corresponding positions of the two fixing rods, and both ends of each screw rod are respectively located in the opposite accommodating grooves of the two fixing rods.

[0013] A further technical solution is: the lifting mechanism also includes a controller, and the controller is connected to the motor to control the operation of the motor.

[0014] In order to solve the above technical problems, according to another aspect of the present invention, a lifting device is provided, comprising a lifting platform for carrying articles and the above lifting mechanism, wherein a connecting rod of the lifting mechanism is connected to the lower surface of the lifting platform.

[0015] A further technical solution is as follows: the lifting device further comprises at least two connecting members, the connecting members are distributed on the lower surface of the lifting platform, and each of the connecting rods is rotatably connected to one of the connecting members.

[0016] The beneficial technical effect of the utility model is as follows: compared with the prior art, the lifting mechanism of the utility model is provided with at least two screw rods mounted in parallel on the base frame, and the screw rods are connected to each other through a transmission wheel assembly. The sliding member sleeved on the screw rod is rotatably connected to a connecting rod to connect the lifting platform through the connecting rod. When the motor is working, it cooperates with the transmission wheel assembly to synchronously drive all the screw rods to rotate, so that the sliding member moves left and right along the screw rod, so as to drive the connecting rod to rotate around the axis hinged to the sliding member, thereby lifting the lifting platform, or driving the lifting platform to move downward and store it. It can be seen that the motor and the transmission wheel assembly in the lifting mechanism of the utility model can cooperate to drive multiple screw rods to rotate synchronously, so that the sliding member also moves synchronously. The vertical direction can actively drive the lifting platform up and down through the connecting rod rotatably connected to the sliding member, so as to achieve the effect of synchronous lifting of multiple connecting rods. The screw rod, transmission wheel assembly, connecting rod and motor cooperate, and the overall volume is smaller than the solution of driving a rigid chain in the traditional solution. At the same time, the motor torque is not too large due to the increase in the lifting distance of the lifting platform, which can reduce the requirements for the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of a specific embodiment of the lifting device of the utility model;

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of the lifting device of the utility model from another angle;

[0019] Figure 3 It is a structural schematic diagram of the lifting device of the utility model in a lifting state. DETAILED DESCRIPTION

[0020] In order to more fully understand the technical content of the present invention, the technical solution of the present invention is further introduced and illustrated below with reference to the schematic diagram, but is not limited thereto.

[0021] Reference Figures 1 to 3 , Figures 1 to 3A specific embodiment of the lifting device 100 of the present invention is shown. In the embodiment shown in the accompanying drawings, the lifting device 100 includes a lifting mechanism 10 and a lifting platform 20 for carrying articles. The lifting mechanism 10 includes a base frame 11, a driving assembly and a lifting assembly arranged on the base frame 11, wherein the driving assembly includes a motor (not shown in the figure) and a transmission wheel assembly 122, and the lifting assembly includes at least two connecting rods 133 and at least two screw rods 131 arranged in parallel on the base frame 11, each of the screw rods 131 is sleeved with a sliding member 132, one end of each of the connecting rods 133 is rotatably connected to the sliding member 132, and the other end is connected to the lifting platform 20, and the screw rods 131 are connected to each other through the transmission wheel assembly 122, the motor is connected to one of the screw rods 131 to cooperate with the transmission wheel assembly 122 to synchronously drive all the screw rods 131 to rotate, thereby driving all the sliding members 132 to move left and right along the screw rods 131, prompting the connecting rods 133 to drive the lifting platform 20 to move up and down. Preferably, in this embodiment, the lifting mechanism 10 may further include a controller, which is connected to the motor to control the forward and reverse rotation of the motor, thereby realizing the lifting or lowering of the lifting platform 20. In the lifting mechanism 10 of the utility model, the motor and the transmission wheel assembly 122 cooperate to drive the screw rod 131 to rotate synchronously, so that the sliding member 132 also moves synchronously. In the vertical direction, the lifting platform 20 can be actively driven up and down by the connecting rod 133 rotatably connected to the sliding member 132, so as to achieve the effect of synchronous lifting of multiple connecting rods 133. Moreover, the screw rod 131, the transmission wheel assembly 122, the connecting rod 133 and the motor cooperate, and the overall volume is smaller than the structure of synchronous drive of the motor, sprocket and rigid chain in the prior art. At the same time, the motor torque does not increase excessively due to the increase in the lifting distance of the lifting platform 20, which can reduce the requirements for the motor during lifting.

[0022] In some embodiments, the transmission wheel assembly 122 includes at least two gears 1221. Each screw rod 131 is connected to a gear 1221 at one end, and adjacent gears 1221 mesh with each other. Based on this design, the transmission between adjacent screw rods 131 is directly transmitted through the meshing gears 1221 in the present invention, achieving the effect of synchronously lifting multiple connecting rods 133 with only one motor drive. Furthermore, the transmission wheel assembly 122 is relatively small in size, saving space.

[0023] In the present invention, different numbers of connecting rods 133, screw rods 131 and sliding members 132 can be provided according to the size of the lifting platform 20 and the weight of the product being carried. Figure 1 and Figure 2As shown, the number of the screw rod 131, the connecting rod 133, the gear 1221 and the sliding member 132 is three. In this embodiment, the base frame 11 includes two fixed rods 111 arranged opposite to each other, and three accommodating grooves 1111 are respectively provided at corresponding positions of the two fixed rods 111. The two ends of each screw rod 131 are respectively located in the accommodating grooves 1111 opposite to the two fixed rods 111. The three sliding members 132 are respectively sleeved on the three screw rods 131, and the three sliding members 132 are respectively sleeved on the three screw rods 131. Two of the sliding members 132 are located on the same side, and the other sliding member 132 is located on the other side. One ends of the three connecting rods 133 are rotatably connected to the three sliding members 132, and adjacent connecting rods 133 are staggered. The other ends of the three connecting rods 133 are connected to the lower surface of the lifting platform 20 and form a triangular support. The motor is connected to one of the screw rods 131, and one end of the three parallel screw rods 131 is connected to each other through three mutually meshing gears 1221. Based on the above design, adjacent connecting rods 133 among the three connecting rods 133 are staggered, forming a stable triangular support between the connecting rods 133 and the lifting platform 20. The strength and stability of the support are greatly increased, which can ensure the smooth lifting or lowering of the lifting platform 20, and achieve the effect of synchronous lifting of three groups of connecting rods 133 driven by only one motor. While achieving the same lifting effect, it also saves space compared to other drive structures.

[0024] It can be understood that in some other embodiments, the number of the screw rods 131, connecting rods 133, gears 1221 and sliding members 132 can also be set to two, and the two sliding members 132 are respectively sleeved on the two screw rods 131 and are located on different sides. One end of the two connecting rods 133 is respectively rotatably connected to the two sliding members 132, and the other end thereof is respectively used to connect to the middle or diagonal position of the opposite sides of the lifting platform 20. The motor is connected to one of the screw rods 131, and one end of the two screw rods 131 is connected by two mutually meshing gears 1221. When the motor is working, the screw rod 131 rotates synchronously and the two connecting rods 133 move synchronously, which can also achieve support, lifting and lowering of the lifting platform 20.

[0025] Continue to refer to Figure 1 and Figure 2 In this embodiment, the sliding member 132 can be a screw nut, and a raised connecting portion 1321 is formed on the upper end of the screw nut. One end of the connecting rod 133 is rotatably connected to the connecting portion 1321. When the screw 131 rotates, the screw nut can move left and right along the screw 131, and the connecting rod 133 can rotate relative to the connecting portion 1321 of the screw nut, thereby realizing the lifting or lowering of the lifting platform 20 in the vertical direction.

[0026] Furthermore, in some embodiments, the lifting device 100 also includes three connecting parts 30, which are distributed on the lower surface of the lifting platform 20. Each of the connecting rods 133 is rotatably connected to one of the connecting parts 30, so that when the lifting device 100 is working, the connecting rod 133 can also rotate relative to the connecting part 30, which is more conducive to the smooth lifting and lowering of the lifting platform 20.

[0027] When the lifting device 100 of this embodiment is used, the power is turned on and the motor works, so that the screw rod 131 connected thereto rotates. Under the action of the mutually meshing gears 1221, the other two screw rods 131 also rotate synchronously, driving the three screw nuts to move along the screw rods 131. When the screw nuts move, the two ends of the connecting rod 133 rotate relative to the connecting portion 1321 and the connecting member 30 respectively, and move upward, actively driving the lifting platform 20 to move upward in the vertical direction, thereby achieving the lifting of the lifting platform 20 (such as Figure 3 When the lifting is completed and the items on the lifting platform 20 are taken away, the motor reverses, the screw rod 131 rotates in the opposite direction, and the screw nut moves back, so that the connecting rod 133 moves downward, close to the screw rod 131, to achieve storage.

[0028] To sum up, the motor and transmission wheel assembly in the lifting mechanism of the utility model can cooperate to drive multiple screw rods to rotate synchronously, so that the sliding parts also move synchronously. The vertical direction can actively drive the lifting platform up and down through the connecting rod rotatably connected to the sliding parts and the lifting platform, thereby achieving the effect of synchronous lifting of multiple connecting rods. In addition, while achieving the same lifting effect, the lifting mechanism of the utility model has a smaller overall volume than the traditional solution of driving a rigid chain, which can reduce the demand for space. At the same time, the motor torque does not increase with the increase of the lifting distance of the lifting platform, which can reduce the requirements for the motor during lifting.

[0029] The above preferred embodiments should be regarded as examples of the implementation methods of the present utility model. Any technical deductions, replacements, improvements, etc. that are identical or similar to the present utility model or made based on this embodiment should be regarded as within the scope of protection of this patent.

Claims

1. A lifting mechanism, characterized in that: The lifting mechanism comprises: scaffolding; A drive assembly comprising a motor and a transmission wheel assembly; The lifting assembly includes at least two connecting rods and at least two screw rods mounted in parallel on the base frame. A sliding member is sleeved on each of the screw rods. One end of each of the connecting rods is rotatably connected to the sliding member, and the other end is used to connect to the lifting platform. The screw rods are connected through the transmission wheel assembly. The motor is connected to one of the screw rods to cooperate with the transmission wheel assembly to synchronously drive all the screw rods to rotate, thereby driving all the sliding members to move left and right along the screw rods, prompting the connecting rods to drive the lifting platform to move up and down.

2. The lifting mechanism according to claim 1, wherein: The transmission wheel assembly includes at least two gears, one end of each screw rod is connected to a gear, and adjacent gears are meshed with each other.

3. The lifting mechanism according to claim 1 or 2, characterized in that: The number of the screw rods, the connecting rods and the sliding parts is three, the three sliding parts are respectively connected to the three screw rods, and two of the three sliding parts are located on the same side, and the other sliding part is located on the other side, one end of the three connecting rods is respectively rotatably connected to the three sliding parts, and the adjacent connecting rods are staggered, the motor is connected to one of the screw rods, and one end of the three parallel screw rods is connected through the transmission wheel assembly.

4. The lifting mechanism according to claim 1 or 2, characterized in that: The number of the screw rods, the connecting rods and the sliding parts is two. The two sliding parts are respectively sleeved on the two screw rods and are located on different sides. One end of the two connecting rods is respectively rotatably connected to the two sliding parts, and the other end thereof is respectively used to be connected to the middle or diagonal position on the opposite sides of the lifting platform. The motor is connected to one of the screw rods, and one end of the two screw rods is connected through the transmission wheel assembly.

5. The lifting mechanism according to claim 1, wherein: The sliding member is a screw nut, the upper end of the screw nut is formed with a protruding connection portion, and one end of the connecting rod is rotatably connected to the connection portion.

6. The lifting mechanism according to claim 1, wherein: The base frame includes two oppositely arranged fixing rods, at least two receiving grooves are respectively provided at corresponding positions of the two fixing rods, and both ends of each screw rod are respectively located in the opposite receiving grooves of the two fixing rods.

7. The lifting mechanism according to claim 1, wherein: The lifting mechanism further includes a controller connected to the motor to control the operation of the motor.

8. A lifting device, characterized in that: The lifting device comprises a lifting platform for carrying articles and the lifting mechanism according to any one of claims 1 to 7, wherein a connecting rod of the lifting mechanism is connected to the lower surface of the lifting platform.

9. The lifting device according to claim 8, wherein: The lifting device further comprises at least two connecting members, which are distributed on the lower surface of the lifting platform, and each connecting rod is rotatably connected to a corresponding connecting member.

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