A lifting mechanism with a buffering function

Abstract

The present invention discloses a lifting mechanism with a buffering function, which includes a frame, a lifting platform and a driving assembly. The lifting platform includes a platform body and a plurality of connecting seats arranged on the platform body. The driving assembly includes a plurality of screw rods rotatably arranged on the frame around their respective axial directions, a plurality of nuts sleeved on the screw rods, and a driving module for driving the plurality of screw rods to rotate synchronously. The plurality of connecting seats are respectively sleeved on the plurality of screw rods one by one and are located above the nuts. The lifting mechanism further includes a plurality of deformable buffering parts, and two ends of the buffering parts are respectively abutted against the mutually approaching end faces of the nuts and the connecting seats. Through the cooperation of the connecting seats, the buffering parts and the nuts, when the lifting platform tilts due to the offset of the center of gravity of the loaded component, the connecting seats move towards the direction close to the nuts, and the buffering parts can use their own deformation force to offset part of the downward pressure of the connecting seats, realizing the balanced buffering of the connecting seats and slowing down the tilting trend of the lifting platform.

Description

Technical Field

[0001] The present invention relates to a lifting mechanism with a buffering function. Background Art

[0002] Existing lifting mechanisms generally include a lifting platform, lead screws, pulleys and belts. Specifically, multiple lead screws are rotatably connected to the bottom plate, pulleys are arranged at the ends of the lead screws, and the lifting platform is threadedly connected to the lead screws. During lifting, the belt drives the pulley to rotate, and the pulley drives the lead screw to rotate, so that the lifting platform can be lifted under the action of the lead screw. However, directly threadedly connecting the lifting platform to the lead screw, during the lifting process of the lifting platform, if the components carried on it are heavy and the center of gravity is offset, the lifting platform may tilt under the influence of the offset of the center of gravity of the components, resulting in frictional contact and a huge abnormal noise due to the tilt between it and the lead screw. Thus, it is extremely easy to damage the lifting platform and the lead screw, shortening the service life of the lifting platform. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a lifting mechanism with a buffering function.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is:

[0005] A lifting mechanism with a buffering function includes a frame, a liftable lifting platform arranged on the frame, and a driving assembly for driving the lifting platform to lift. The lifting platform includes a platform body and a plurality of connecting seats arranged on the platform body. The driving assembly includes a plurality of screws rotatably arranged on the frame around their respective axial directions, a plurality of nuts respectively threadedly sleeved on the screws, and a driving module for driving the plurality of screws to rotate synchronously. The plurality of connecting seats are respectively sleeved on the plurality of screws and located above the nuts. The lifting mechanism further includes a plurality of deformable buffering parts respectively arranged between the nuts and the corresponding connecting seats, and two ends of the buffering parts respectively abut against one end surfaces of the nuts and the connecting seats close to each other.

[0006] Preferably, the connecting seat is detachably connected to the corner of the platform body.

[0007] More preferably, the connecting seat includes a seat body, a guiding hole opened on the seat body for the screw to pass through, and a connecting part formed on the side of the seat body and extending outward for connecting with the platform body. The buffering part abuts against one end surface of the seat body close to the nut.

[0008] Further preferably, the end faces of the seat body and the nut that are close to each other are respectively provided with a plurality of engaging teeth arranged at intervals around the circumference of the screw, and engaging grooves are respectively formed between two adjacent engaging teeth on the seat body and between two adjacent engaging teeth on the nut, and the plurality of engaging teeth on one of the seat body and the nut are respectively and one-to-one inserted into the plurality of engaging grooves on the other, and there is a gap between the engaging teeth and the bottom of the corresponding engaging grooves.

[0009] More preferably, the width of the engaging tooth is smaller than the width of the corresponding engaging groove, and the buffer portion comprises a plurality of buffer blocks arranged at circumferential intervals around the screw, and the buffer blocks are embedded in the engaging groove and located on the side of the engaging tooth corresponding to the engaging groove.

[0010] Preferably, the frame includes a top frame and a bottom frame which are arranged up and down and parallel to each other, the lifting mechanism also includes a plurality of plane bearings arranged on the top frame, the upper end of the screw rod is rotatably connected to the plane bearing, and the lower end is located above the bottom frame.

[0011] Further preferably, the lifting mechanism also includes a plurality of first bearing seats provided on the top frame and corresponding to those located below the plurality of plane bearings, and a plurality of second bearing seats provided on the bottom frame and corresponding one-to-one to the plurality of first bearing seats, and the two ends of the screw rod are rotatably inserted into the first bearing seats and the second bearing seats, respectively.

[0012] Preferably, the driving module includes a driving wheel and a motor for driving the driving wheel to rotate, and transmission wheels are respectively mounted on the multiple screw rods. The driving wheel and the multiple transmission wheels are located in the same plane and the plane is parallel to the plane where the lifting platform is located. The driving wheel and the transmission wheel are connected by a transmission belt.

[0013] Further preferably, the lifting mechanism further comprises a mounting plate uprightly arranged on the frame for mounting the motor, and a through slot provided at a lower portion of the mounting plate, wherein the transmission belt passes through the through slot.

[0014] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: In the lifting mechanism of the present invention, through the cooperation of the connecting seat, the buffer part and the nut, when the lifting platform tilts due to the offset of the center of gravity of the loaded component, the connecting seat moves towards the direction close to the nut, and the buffer part can use its own deformation force to offset part of the downward pressure of the connecting seat, achieving the balance buffer of the connecting seat, slowing down the tilting trend of the lifting platform, thereby reducing the friction generated by the mutual contact of the connecting seat and the screw rod and the abnormal noise during the operation of the lifting platform caused thereby, and prolonging the service life of the lifting platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG. Figure 1 is a schematic structural diagram of the lifting mechanism in the specific embodiment of the present invention;

[0016] FIG. Figure 2 is the schematic view in the A-A direction of Figure 1 ;

[0017] FIG. Figure 3 is a schematic installation structure diagram of the buffer part, the connecting seat and the nut in the specific embodiment of the present invention;

[0018] FIG. Figure 4 is the Figure 3 explosion schematic diagram of

[0019] In the figures: 1, frame; 1a, top frame; 1b, bottom frame; 2, lifting platform; 2a, platform body; 2b, connecting seat; 2b1, seat body; 2b2, guide hole; 2b3, connecting part; 3, driving assembly; 3a, screw rod; 3b, nut; 3c, driving module; 3c1, driving wheel; 3c2, motor; 4, buffer part; 4a, buffer block; 5, engaging tooth; 6, engaging groove; 7, gap; 8, plain bearing; 9, first bearing seat; 10, second bearing seat; 11, transmission wheel; 12, transmission belt; 13, mounting plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0021] The present invention relates to an improvement of a lifting mechanism. The improved lifting mechanism, through the cooperation of the connecting seat 2b, the buffer part 4 and the nut 3b, when the lifting platform 2 tilts due to the offset of the center of gravity of the loaded component, the connecting seat 2b moves towards the direction close to the nut 3b, and the buffer part 4 can use its own deformation force to offset part of the downward pressure of the connecting seat 2b, achieving the balance buffer of the connecting seat 2b, slowing down the tilting trend of the lifting platform 2, thereby reducing the friction generated by the mutual contact of the connecting seat 2b and the screw rod 3a and the abnormal noise during the operation of the lifting platform 2 caused thereby, and prolonging the service life of the lifting platform 2.

[0022] See Figures 1-4 As shown, a lifting mechanism with a buffering function is shown, which includes a frame 1, a lift platform 2 that is liftable and disposed on the frame 1, and a driving assembly 3 for driving the lift platform 2 to lift. The lift platform 2 includes a platform body 2a and a plurality of connecting seats 2b disposed on the platform body 2a. The driving assembly 3 includes a plurality of screw rods 3a rotatably disposed on the frame 1 around their respective axial directions, a plurality of nuts 3b respectively threadedly sleeved on the screw rods 3a in a one-to-one correspondence, and a driving module 3c for driving the plurality of screw rods 3a to rotate synchronously. The plurality of connecting seats 2b are respectively sleeved on the plurality of screw rods 3a in a one-to-one correspondence and are located above the nuts 3b. The lifting mechanism further includes a plurality of deformable buffering portions 4 respectively disposed between the nuts 3b and the corresponding connecting seats 2b. The two ends of the buffering portion 4 are respectively abutted against the mutually approaching end faces of the nut 3b and the connecting seat 2b.

[0023] In this example, in combination with Figures 1-2 As shown, the platform body 2a is rectangular, and the connecting seats 2b are detachably connected to the four corner portions of the platform body 2a. Correspondingly, there are four screw rods 3a and four nuts 3b. When the lift platform 2 operates, the driving module 3c drives the four screw rods 3a to rotate synchronously, driving the nuts 3b on the screw rods 3a to lift. When the nut 3b rises, it jacks up the lift platform 2. When the nut 3b descends, the lift platform 2 descends together with the nut 3b. When the load-bearing member on the lift platform 2 has a center-of-gravity offset, the lift platform 2 tilts, and the connecting seat 2b moves towards the direction close to the nut 3b. At this time, the buffering portion 4 uses its own deformation force to offset part of the downward pressure of the connecting seat 2b, achieving balanced buffering of the connecting seat 2b, thereby slowing down the tilting trend of the lift platform 2.

[0024] Furthermore, the connecting seat 2b includes a seat body 2b1, a guiding hole 2b2 opened on the seat body 2b1 for the screw rod 3a to pass through, and a connecting portion 2b3 formed on the side portion of the seat body 2b1 and extending outward for connecting with the platform body 2a. The buffering portion 4 abuts against the end face of the seat body 2b1 close to the nut 3b. Among them, the screw rod 3a and the guiding hole 2b2 are in clearance fit. Through the setting of the guiding hole 2b2, the smoothness of the lifting of the lift platform 2 is further ensured.

[0025] In this embodiment, in combination with Figures 3-4 As shown, the mutually approaching end faces of the seat body 2b1 and the nut 3b are respectively provided with a plurality of engaging teeth 5 arranged at intervals around the circumference of the screw rod 3a. Engaging grooves 6 are respectively formed between two adjacent engaging teeth 5 on the seat body 2b1 and between two adjacent engaging teeth 5 on the nut 3b. The plurality of engaging teeth 5 on one of the seat body 2b1 and the nut 3b are respectively inserted into the plurality of engaging grooves 6 on the other, and there is a clearance 7 between the engaging tooth 5 and the bottom of its corresponding engaging groove 6.

[0026] Furthermore, the width of the engaging tooth 5 is smaller than the width of the corresponding engaging groove 6 , and the buffer portion 4 includes a plurality of buffer blocks 4a arranged at circumferential intervals around the screw rod 3a , and the buffer blocks 4a are embedded in the engaging groove 6 and are located on the side of the engaging tooth 5 corresponding to the engaging groove 6 .

[0027] Here, the buffer block 4a can be made of any existing deformable material. By designing the width of the engaging teeth 5 and the engaging grooves 6, the buffer block 4a can be embedded in the engaging grooves 6 on the sides of the engaging teeth 5. At the same time, since there is a gap 7 between the engaging teeth 5 and the corresponding bottoms of the engaging grooves 6, the two end faces of the buffer block 4a can be completely abutted against the end faces of the connecting seat 2b and the nut 3b that are close to each other, effectively ensuring the buffering effect of the buffer block 4a.

[0028] In this embodiment, combined with Figure 1 As shown, the frame 1 includes a top frame 1a and a bottom frame 1b arranged up and down and parallel to each other, and the lifting mechanism also includes a plurality of plane bearings 8 arranged on the top frame 1a, and the upper end of the screw 3a is rotatably connected to the plane bearing 8, and the lower end is located above the bottom frame 1b. In this way, by connecting the upper end of the screw 3a to the plane bearing 8, during the lifting process of the lifting platform 2, the force points of the screw 3a are all concentrated on the connection between the upper end of the screw 3a and the plane bearing 8, and the lower end of the screw 3a is not subjected to force, thereby preventing the screw 3a from bending and deforming due to pressure during the lifting process of the lifting platform 2.

[0029] The lifting mechanism further includes a plurality of first bearing seats 9 provided on the top frame 1a and corresponding to the plurality of plane bearings 8, and a plurality of second bearing seats 10 provided on the bottom frame 1b and corresponding to the plurality of first bearing seats 9 one by one. The two ends of the screw rod 3a are rotatably inserted into the first bearing seats 9 and the second bearing seats 10. In this way, the upper end and the lower end of the screw rod 3a can be limited by the first bearing seats 9 and the second bearing seats 10 to prevent the screw rod 3a from shaking during the lifting and lowering process of the lifting platform 2, wherein the bearings in the first bearing seats 9 and the second bearing seats 10 are rolling bearings.

[0030] In this embodiment, the driving module 3c includes a driving wheel 3c1 and a motor 3c2 for driving the driving wheel 3c1 to rotate. A plurality of screw rods 3a are respectively provided with transmission wheels 11. The driving wheel 3c1 and the plurality of transmission wheels 11 are located in the same plane and the plane is parallel to the plane where the lifting platform 2 is located. The driving wheel 3c1 and the transmission wheel 11 are connected by a transmission belt 12.

[0031] The lifting mechanism also includes a mounting plate 13 vertically arranged on the frame 1 for mounting the motor 3c2, and a through slot provided at the lower part of the mounting plate 13, and the transmission belt 12 is passed through the through slot.

[0032] The above embodiments are only used to illustrate the technical concept and features of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It is not intended to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A lifting mechanism with a buffering function, characterized in that: The lifting platform comprises a frame, a lifting platform which is liftable and arranged on the frame, and a driving component for driving the lifting platform to lift and lower. The lifting platform comprises a platform body, and a plurality of connecting seats arranged on the platform body. The driving component comprises a plurality of screws which are rotatable around their own axes and arranged on the frame, a plurality of nuts which are respectively threadedly sleeved on the screws in a one-to-one correspondence, and a driving module for driving the plurality of screws to rotate synchronously. The plurality of connecting seats are respectively sleeved on the plurality of screws in a one-to-one correspondence and are located above the nuts. The lifting mechanism also comprises a plurality of deformable buffer parts which are respectively arranged between the nuts and the corresponding connecting seats, and the two ends of the buffer parts are respectively in contact with one end surface of the nut and the connecting seat which are close to each other. The connecting seat is detachably connected to the corner of the platform body; The connecting seat comprises a seat body, a guide hole provided on the seat body for the screw to pass through, a connecting portion formed on the side of the seat body and extending outwards for connecting with the platform body, and the buffer portion abuts against an end surface of the seat body close to the nut; The seat body and the nut are each provided with a plurality of engaging teeth arranged at intervals in the circumferential direction of the screw rod on one end face thereof which are close to each other, and engaging grooves are respectively formed between two adjacent engaging teeth on the seat body and between two adjacent engaging teeth on the nut, and the plurality of engaging teeth on one of the seat body and the nut are respectively inserted into the plurality of engaging grooves on the other one in a one-to-one correspondence, and there is a gap between the engaging teeth and the bottom of the corresponding engaging grooves, and the two end faces of the buffer block can completely abut against the end faces of the connecting seat and the nut which are close to each other.

2. The lifting mechanism with a buffering function according to claim 1, wherein: The width of the engaging tooth is smaller than the width of the corresponding engaging groove. The buffer portion includes a plurality of buffer blocks arranged at intervals around the circumference of the screw rod. The buffer blocks are embedded in the engaging groove and are located on the side of the engaging tooth corresponding to the engaging groove.

3. The lifting mechanism with a buffering function according to claim 1, wherein: The frame includes a top frame and a bottom frame which are arranged up and down and parallel to each other. The lifting mechanism also includes a plurality of plane bearings arranged on the top frame. The upper end of the screw rod is rotatably connected to the plane bearing and the lower end is located above the bottom frame.

4. A lifting mechanism with a buffering function according to claim 3, characterized in that: The lifting mechanism also includes a plurality of first bearing seats arranged on the top frame and corresponding to each other and located below the plurality of plane bearings, and a plurality of second bearing seats arranged on the bottom frame and corresponding to each other one by one with the plurality of first bearing seats. The two ends of the screw rod are rotatably inserted into the first bearing seats and the second bearing seats respectively.

5. A lifting mechanism with a buffering function according to claim 1, characterized in that: The driving module includes a driving wheel and a motor for driving the driving wheel to rotate. Transmission wheels are respectively mounted on the multiple screw rods. The driving wheel and the multiple transmission wheels are located in the same plane and the plane is parallel to the plane where the lifting platform is located. The driving wheel and the transmission wheel are connected by a transmission belt.

6. The lifting mechanism with a buffering function according to claim 5, characterized in that: The lifting mechanism further comprises a mounting plate vertically arranged on the frame for mounting the motor, and a through slot provided at the lower part of the mounting plate, wherein the transmission belt is passed through the through slot.

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