CN209955375U

CN209955375U - Automatic lifting platform

Info

Publication number: CN209955375U
Application number: CN201821550304.5U
Authority: CN
Inventors: 杨军京
Original assignee: BEIJING ZONCI WEIYE TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: BEIJING ZONCI WEIYE TECHNOLOGY DEVELOPMENT Co Ltd
Priority date: 2018-09-21
Filing date: 2018-09-21
Publication date: 2020-01-17
Anticipated expiration: 2028-09-21

Abstract

The utility model particularly discloses an automatic lifting platform, which comprises a base; the two lead screws are arranged at intervals, and the lead screws are rotatably arranged on the base; the screw rod nuts are arranged in one-to-one correspondence with the screw rods and are in threaded connection with the screw rods; the lifting platform is fixedly connected with the two lead screw nuts; the driving device comprises a motor, a first belt wheel arranged on the motor, two second belt wheels respectively arranged on two lead screws, a transmission belt connecting the first belt wheel and the two second belt wheels, and a tensioning device arranged on a base and used for supporting the motor, wherein the tensioning device is configured to drive the motor to enable the motor to always have a movement trend for tensioning the transmission belt, so that the motor can always load the transmission belt through the tensioning device, and the problem of inaccurate lifting height control of the lifting platform caused by the loosening of the transmission belt can be effectively prevented.

Description

Automatic lifting platform

Technical Field

The utility model relates to a elevating platform field especially relates to an automatic lift platform.

Background

At present, an automatic lifting platform mostly comprises a lifting platform and a driving device, and the driving device drives the lifting platform to ascend and descend in the vertical direction to complete the pressing operation.

The driving device is various, in the prior art, some screw rods and screw nuts are adopted to drive, the screw rods are connected with the lifting platform through the screw nuts, the screw rods are connected with the belt transmission assembly, the belt transmission assembly is driven by the motor to realize the lifting of the lifting platform, and the screw rods and the screw nuts can be subjected to position control accurately, but the belt transmission assembly is easy to loose after being used for a long time to cause inaccurate position control of the lifting platform.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the utility model provides an automatic lifting platform to when adopting screw and screw nut drive elevating platform to go up and down among the solution prior art, the problem that the long-time easy lax of using of belt drive assembly.

The utility model provides an automatic lifting platform, this automatic lifting platform includes: a base;

the two lead screws are arranged at intervals, and the lead screws are rotatably arranged on the base;

the screw rod nuts are arranged in one-to-one correspondence with the screw rods, and the screw rod nuts are in threaded connection with the screw rods;

the lifting platform is fixedly connected with the two lead screw nuts;

the driving device comprises a motor, a first belt wheel arranged on the motor, two second belt wheels respectively arranged on the two lead screws, a transmission belt connecting the first belt wheel and the two second belt wheels, and a tensioning device arranged on the base and used for supporting the motor, wherein the tensioning device is configured to drive the motor to always have a motion trend of tensioning the transmission belt.

As preferred, overspeed device tensioner is including installing tensioning seat on the base wears to establish two at least floating rods on the tensioning seat, and wears to establish spring on the floating rod, the equal one end of floating rod with motor fixed connection, the other end slides and wears to establish on the tensioning seat, the spring with the floating rod one-to-one sets up, the spring is located the motor with between the tensioning seat, the both ends of spring support tightly respectively in the motor with the tensioning seat.

Preferably, the tensioning device further comprises a tensioning wheel rotatably disposed on the tensioning seat, and the transmission belt passes around the tensioning wheel.

Preferably, the automatic lifting platform further comprises a top seat located above the base, and a plurality of supporting rods, one ends of the supporting rods are connected with the top seat, the other ends of the supporting rods are connected with the base, the lifting platform is located between the top seat and the base, and two ends of the lead screw are respectively connected with the top seat and the base in a rotating mode.

Preferably, the automatic lifting platform further comprises two guide pillars arranged at intervals, the axis of each guide pillar is vertical, two ends of each guide pillar are respectively connected with the top seat and the base, and the two lead screw nuts are respectively sleeved on the two guide pillars.

Preferably, the automatic lifting platform further comprises a connecting block mounted on the screw nut, the guide posts penetrate through the connecting block and are slidably connected with the connecting block, and the connecting blocks are arranged in one-to-one correspondence with the screws.

Preferably, a U-shaped groove extending in the vertical direction is formed in the connecting block, and the guide post is located in the U-shaped groove.

Preferably, the automatic lifting platform further comprises bearings, two bearings are respectively sleeved at two ends of each lead screw, one of the bearings is fixed on the top seat, the other bearing is fixed on the base, and the lead screws are rotatably connected with the bearings.

Preferably, the first belt wheel and the two second belt wheels are arranged in an isosceles triangle, the first belt wheel corresponds to the end point of the top of the isosceles triangle, and the two second belt wheels correspond to the two end points of the bottom of the isosceles triangle respectively.

The utility model has the advantages that:

the motor drives the two lead screws to rotate through the transmission belt, and the two lead screws are both rotatably installed on the base, and the lead screw nuts are both fixedly connected with the lifting platform, so that the two lead screws respectively drive the lead screw nuts to do lifting motion along the axes of the lead screw nuts, and the lifting platform is driven to lift through the two lead screw nuts; the motor always tensions the driving belt through the tensioning device, so that the problem of inaccurate control of the lifting position of the lifting platform caused by the fact that the tensioning belt is loosened due to long-time use can be prevented.

Drawings

Fig. 1 is a first schematic structural diagram of an automatic lifting platform in an embodiment of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

fig. 3 is a schematic structural diagram of an automatic lifting platform in the embodiment of the present invention;

fig. 4 is an enlarged view at B in fig. 1.

In the figure:

1. a base; 2. a top seat; 3. a support bar; 4. a lead screw; 5. a lead screw nut; 6. a lifting platform; 7. a drive device; 8. a guide post; 9. connecting blocks;

71. a motor; 72. a first pulley; 73. a second pulley; 74. a transmission belt; 75. a tensioning device;

751. a tensioning seat; 752. a floating rod; 753. a spring; 754. a tension wheel;

91. a U-shaped groove.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1 to 4, the present embodiment provides an automatic lifting platform, which includes: the lifting device comprises a base 1, a top seat 2, a supporting rod 3, a lead screw 4, a lead screw nut 5, a lifting platform 6 and a driving device 7, wherein the top seat 2 and the base 1 are arranged at intervals, and the top seat 2 is located right above the base 1. Base 1 is squarely, and four bracing pieces 3 are located four edges of base 1 respectively, and bracing piece 3 sets up along vertical direction, the one end and the base 1 fixed connection of its bottom, the one end and the 2 fixed connection of footstock at top. Two lead screws 4 set up along base 1's length direction interval, all wear to be equipped with two bearings on every lead screw 4, one of them bearing fixed mounting is on base 1, and another bearing fixed mounting is on footstock 2, and lead screw 4 can be footstock 2 and base 1 rotation relatively through two bearings. Equal spiro union has a screw nut 5 on every lead screw 4, and elevating platform 6 is located between footstock 2 and the base 1, two screw nuts 5 all with elevating platform 6 fixed connection to when lead screw 4 rotated, screw nut 5 drove elevating platform 6 and goes up and down between footstock 2 and base 1. The drive means 7 comprises a motor 71, a first pulley 72, a second pulley 73, a drive belt 74 and a tensioning device 75. The tensioning device 75 is installed on the plane of the bottom of the base 1 and connected with the motor 71, the first belt pulley 72 is fixedly installed on the output shaft of the motor 71, one end of the bottom of each lead screw 4 is provided with a second belt pulley 73, the first belt pulley 72 and the two second belt pulleys 73 are connected through a transmission belt 74, and when the motor 71 rotates, the two lead screws 4 can be driven to synchronously rotate. In the present embodiment, the tensioning device 75 is configured to drive the motor 71 to always have a movement tendency of tensioning the belt 74, so that it can be ensured that the belt 74 is always in a tensioned state, and the lifting height of the lifting table 6 can be accurately controlled.

Specifically, overspeed device tensioner 75 includes tensioning seat 751, float bar 752 and spring 753, tensioning seat 751 fixed mounting is in one side of base 1 bottom, it all is equipped with the through-hole to correspond each float bar 752 on tensioning seat 751, two float bars 752 all slide and wear to establish in the through-hole, and the both ends of float bar 752 are located the both ends of through-hole respectively, motor 71 is located one side of tensioning seat 751 and is located the base 1 outside, motor 71 respectively with two float bar 752 one-sidedly one end fixed connection, spring 753 and float bar 752 one-to-one set up, spring 753 wears to establish on float bar 752 and its both ends support tightly with motor 71 and tensioning seat 751 respectively. In the embodiment, the spring 753 drives the motor 71 to always keep the trend of moving away from the base 1, so that the transmission belt 74 can be tensioned, and the spring 753 can prevent the vibration generated when the motor 71 works from being transmitted to the base 1, so that the service life of the transmission belt 74 can be prolonged, and meanwhile, the noise generated when the motor 71 works can be reduced; the tension applied by the spring 753 to the motor 71 can be adjusted by replacing the spring 753 of a different length and a different elasticity.

In this embodiment, the first belt pulley 72 and the two second belt pulleys 73 are arranged in an isosceles triangle, the first belt pulley 72 corresponds to the end point of the top of the isosceles triangle, and the two second belt pulleys 73 correspond to the two end points of the bottom of the isosceles triangle respectively. Therefore, the two second belt wheels 73 can be uniformly stressed, the control precision of the lifting height of the lifting platform 6 is improved, and the service life of the transmission belt 74 can be prolonged.

The tensioning device 75 further comprises two tensioning rollers 754 rotatably arranged on the tensioning mounts 751, the drive belt 74 passing around the tensioning rollers 754. Specifically, the two tension pulleys 754 are located between the first pulley 72 and the second pulley 73, the transmission belt 74 is wound around the outer side of the first pulley 72, the inner sides of the two tension pulleys 754, and the outer sides of the two second pulleys 73, and the two tension pulleys 754 are provided to increase the wrap angle between the transmission belt 74 and the first pulley 72 and the second pulley 73, thereby increasing the friction force between the transmission belt 74 and the first pulley 72 and the second pulley 73, and effectively preventing the transmission belt 74 from slipping.

This automatic lift platform still includes guide pillar 8 and connecting block 9, and two guide pillar 8 intervals set up and all follow vertical direction, and the both ends of every guide pillar 8 respectively with base 1 and footstock 2 fixed connection. In this implementation, two guide pillars 8 are adjacent to two lead screws 4 respectively, and two connecting blocks 9 and two guide pillars 8 one-to-one are connected, and connecting

block

9 and 5 fixed connection of screw nut and slip cap establish on guide pillar 8. Specifically, be equipped with U-shaped groove 91 on connecting block 9, this U-shaped groove 91 extends along vertical direction, and guide pillar 8 is arranged in U-shaped groove 91 to with connecting block 9 sliding connection, can prevent that 6 lift in-process of elevating platform from taking place crooked through setting up guide pillar 8 and connecting block 9, play good guide effect, and set up U-shaped groove 91 and be convenient for guide pillar 8 and connecting block 9 assembly.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An automatic lifting platform, comprising:

a base (1);

the two screw rods (4) are arranged at intervals, and the screw rods (4) are rotatably arranged on the base (1);

the screw rod nuts (5) are arranged in one-to-one correspondence with the screw rods (4), and the screw rod nuts (5) are screwed on the screw rods (4);

the lifting platform (6) is fixedly connected with the two lead screw nuts (5);

the driving device (7) comprises a motor (71), a first belt wheel (72) installed on the motor (71), two second belt wheels (73) installed on the two lead screws (4) respectively, a transmission belt (74) connecting the first belt wheel (72) and the two second belt wheels (73), and a tensioning device (75) installed on the base (1) and used for supporting the motor (71), wherein the tensioning device (75) is configured to drive the motor (71) to have a movement trend of tensioning the transmission belt (74) all the time.

2. The automatic lifting platform according to claim 1, characterized in that the tensioning device (75) comprises a tensioning seat (751) mounted on the base (1), at least two floating rods (752) passing through the tensioning seat (751), and springs (753) passing through the floating rods (752), wherein the floating rods (752) are fixedly connected with the motor (71) at one end and slidably pass through the tensioning seat (751) at the other end, the springs (753) and the floating rods (752) are arranged in a one-to-one correspondence, the springs (753) are located between the motor (71) and the tensioning seat (751), and two ends of the springs (753) respectively abut against the motor (71) and the tensioning seat (751).

3. The automated lifting platform of claim 2, wherein the tensioning device (75) further comprises a tensioning wheel (754) rotatably disposed on the tensioning seat (751), the belt (74) passing around the tensioning wheel (754).

4. The automatic lifting platform according to claim 1, further comprising a top base (2) located above the base (1), and a plurality of support rods (3) each having one end connected to the top base (2) and the other end connected to the base (1), wherein the lifting platform (6) is located between the top base (2) and the base (1), and two ends of the screw (4) are rotatably connected to the top base (2) and the base (1), respectively.

5. The automatic lifting platform according to claim 4, further comprising two guide pillars (8) spaced apart from each other, wherein the axis of the guide pillars (8) is vertical and both ends of the guide pillars are respectively fixedly connected to the top base (2) and the bottom base (1), and the two lead screw nuts (5) are respectively sleeved on the two guide pillars (8).

6. The automatic lifting platform of claim 5, further comprising a connecting block (9) mounted on the screw nut (5), wherein the guide posts (8) are inserted into the connecting block (9) and slidably connected with the connecting block (9), and the connecting blocks (9) and the screws (4) are arranged in a one-to-one correspondence.

7. The automated lifting platform according to claim 6, characterized in that the connecting block (9) is provided with a U-shaped groove (91) extending in the vertical direction, and the guide post (8) is located in the U-shaped groove (91).

8. The automatic lifting platform according to claim 6, characterized in that the automatic lifting platform further comprises bearings, two bearings are respectively sleeved on two ends of each lead screw (4), one of the bearings is fixed on the top base (2), the other bearing is fixed on the bottom base (1), and the lead screws (4) are rotatably connected with the bearings.

9. The automatic lifting platform according to claim 1, characterized in that said first belt wheel (72) and said two second belt wheels (73) are arranged in an isosceles triangle, said first belt wheel (72) corresponding to the end points of the top of said isosceles triangle and said two second belt wheels (73) corresponding to the two end points of the bottom of said isosceles triangle respectively.