CN113968549B

CN113968549B - Liftable ball platform

Info

Publication number: CN113968549B
Application number: CN202111185851.4A
Authority: CN
Inventors: 罗毅; 许寄桥; 李辉杰; 董枫; 梁感; 秦亮; 王江; 安学玲; 田建坡; 王盈; 刘翰林; 姜石; 张羽; 储婷婷; 马林
Original assignee: Tiandi Shanghai Mining Equipment Technology Co Ltd; China Coal Technology and Engineering Group Corp; China Coal Technology and Engineering Group Shanghai Co Ltd
Current assignee: Tiandi Shanghai Mining Equipment Technology Co Ltd; China Coal Technology and Engineering Group Corp; China Coal Technology and Engineering Group Shanghai Co Ltd
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2023-06-30
Anticipated expiration: 2041-10-12
Also published as: CN113968549A

Abstract

The invention relates to a liftable ball platform, which comprises a frame, a working platform arranged on the top surface of the frame, and a lifting mechanism and a rotating mechanism which are arranged below the working platform, wherein the lifting mechanism comprises guide seats, balls and a bracket, the guide seats are arranged on the bottom surface of the working platform, all guide holes on the guide seats are in one-to-one correspondence and coaxial with all limit holes on the working platform, the balls are arranged on the bracket, the balls are in one-to-one correspondence with the guide holes, the bracket is positioned below the guide seats, the rotating mechanism comprises an optical axis, a cam and a handle, two ends of the optical axis are rotatably connected to the frame, the cam is fixed on the optical axis, the bracket is supported on the cam, and the handle is fixed at one end of the optical axis. The invention can realize the rotation and turnover actions of the frequency converter, replace crane lifting operation, save space and improve turnover efficiency.

Description

Liftable ball platform

Technical Field

The invention relates to a lifting ball platform which can be used for assembling a heavy water-cooling frequency converter for a high-power coal mining machine, and belongs to the field of assembly tooling machinery.

Background

The water-cooling frequency converter used by the coal mining machine has the characteristics of regular shape and heavy weight, the assembly process adopts a technology from bottom to top and from inside to outside, the horizontal rotation action is required to be completed according to the installation requirement of components in the assembly process, after the assembly is completed, the finished product of the frequency converter is required to be circulated, debugged and installed into the electric cabinet of the coal mining machine, and in the transfer processes, crane cranes are required to participate in lifting, a large number of factory cranes and crane cranes are occupied, and the turnover efficiency is low.

Disclosure of Invention

The invention aims to provide a liftable ball platform which is used for realizing the rotation and turnover actions of a frequency converter in the assembly process and after the frequency converter is finished, replacing crane lifting operation, saving space and improving turnover efficiency.

The main technical scheme of the invention is as follows:

the utility model provides a liftable ball platform, includes the frame, installs work platform on the frame top surface and installs elevating system and rotary mechanism in work platform below, elevating system includes guide holder, ball and support, the guide holder is installed on work platform's bottom surface, and each guiding hole on the guide holder and each spacing hole one-to-one and coaxial on the work platform, the ball is installed on the support, ball and guiding hole one-to-one, the support is located the below of guide holder, rotary mechanism includes optical axis, cam and handle, and the both ends of optical axis are rotated and are connected on the frame, the cam is fixed on the optical axis, the support supports on the cam, the one end at the optical axis is fixed to the handle.

The front end and the rear end of the optical axis are respectively provided with a shaft sleeve with radial bosses, the shaft sleeves are positioned on the inner side of the frame, and the optical axis is axially limited relative to the frame through the shaft sleeves.

The front end and the rear end of the optical axis are respectively fixedly provided with one cam, and two shaft sleeves on the same optical axis are positioned at the outer sides of the two cams.

The optical axis is parallel to the left and right.

The guide seats are in a long and thin strip shape, are arranged in a plurality of ways and are arranged side by side at intervals, and a plurality of guide holes are formed in each guide seat at intervals along the front-back direction.

The lifting mechanism further comprises a sliding plate, the sliding plate is a flat plate fixed below the support and used for lifting the support, and the sliding plate is in contact with the four cams to form a four-point supporting structure.

The frame comprises a front side plate, a rear side plate, a left side plate and a right side plate, wherein the front end and the rear end of the optical axis are respectively and rotatably connected to the front side plate and the rear side plate.

The lower part of work platform still is equipped with locking mechanism, locking mechanism includes stopper and connecting rod, and the stopper is L shape, and the upper end of stopper also is the one end of L shape simultaneously and fixes on the optical axis, stopper and cam one-to-one, and the stopper setting is in the vicinity of cam, and connect respectively between the stopper of the front portion of two optical axes about and between the stopper at rear portion one the connecting rod, both ends about the connecting rod with corresponding hinge joint is located on the other end of L shape, the lower part of stopper is equipped with the breach, and the both ends of connecting rod are located breach department, and the top eaves of breach is the plane, and when the support was in lower position, top eaves and the top surface contact formation interference of connecting rod, when the top eaves was in the top surface of two stoppers of parallel state with the connecting rod, the clearance was kept between the two, was arranged in tandem to the breach on two stoppers at same connecting rod both ends.

The top eave is perpendicular to the left side surface and the right side surface of the limiting block.

The handle has one, and the handle is fixed in the front end or the rear end of one optical axis among them, and is located the outside of frame.

The beneficial effects of the invention are as follows:

the assembled frequency converter on the working platform can be manually and rapidly rotated and moved on the premise of not using crane lifting operation, and the turnover efficiency of the heavy frequency converter for the coal mining machine in the production process is improved.

Because the crane is not required to participate in the lifting and transferring of the frequency converter, the occupation of lifting personnel and the crane can be avoided or reduced.

Drawings

FIG. 1 is an exploded view of one embodiment of the present invention;

FIG. 2 is a schematic diagram of an embodiment of the latching mechanism;

FIG. 3 is a schematic structural view of one embodiment of the stopper.

Reference numerals: 1. a working platform; 2. a guide seat; 3. a ball; 4. a bracket; 5. a sliding plate; 6. a handle; 7. a shaft sleeve; 8. a cam; 9. a connecting rod; 901. a top surface; 10. a limiting block; 101. a top eave; 102. left and right sides; 11. an optical axis; 12. left and right side plates; 13. front and rear side plates; 14. a shaft hole; 15. a guide hole; 16. a limiting hole; 17. a gap.

Detailed Description

The invention discloses a liftable ball platform, which is shown in figures 1-3 and comprises a frame, a working platform 1 arranged on the top surface of the frame, and a lifting mechanism and a rotating mechanism arranged below the working platform. The lifting mechanism comprises a guide seat 2, balls 3 and a support 4, wherein the guide seat is arranged on the bottom surface of the working platform, and each guide hole 15 on the guide seat corresponds to each limit hole 16 on the working platform one by one and is coaxial. The ball is installed on the support, and the ball corresponds with the guiding hole one by one. The support is located below the guide seat. The rotating mechanism comprises an optical axis 11, a cam 8 and a handle 6, wherein two ends of the optical axis are rotatably connected to the frame, the cam is sleeved and fixed (e.g. welded) on the optical axis, and the cam adopts an eccentric cylinder structure. The support is supported on the cam, the handle is fixed at one end of the optical axis, the corresponding optical axis can be rotated through the handle, the cam is correspondingly driven to rotate, and the cam drives the support and the ball to lift. When the ball goes up and down, the guide hole on the guide seat is used as the guide, the ball is lifted to be above the table surface of the working platform when the ball is highest, and the ball is positioned below the working platform when the ball is lowest.

When the frequency converter is required to rotate and move on the working platform, the handle is only required to be rotated to lift the balls above the working platform, so that the frequency converter is directly supported on the balls, and the frequency converter can be manually and rapidly rotated or moved along the surface of the working platform with small force.

The front end and the rear end of the optical axis are respectively provided with a shaft sleeve 7 with radial bosses, the shaft sleeves are positioned on the inner side of the frame, and the optical axis is axially limited relative to the frame through the shaft sleeves.

The optical axis is parallel to the left and right. Correspondingly, four cams support the lifting mechanism.

The lifting mechanism further comprises a sliding plate 5, which is a flat plate fixed (e.g. welded) below the bracket and used for lifting the bracket, and the sliding plate is contacted with four cams to form a stable four-point supporting structure.

The frame includes front and rear side plates 13 and left and right side plates 12, and front and rear ends of the optical axis are rotatably connected to the front and rear side plates, respectively, and are supported in paired shaft holes 14 in the front and rear side plates. The front side plate, the rear side plate, the left side plate and the right side plate are fixed by bolts to form a rectangular supporting shell with four vertical faces.

And a locking mechanism is further arranged below the working platform and comprises a limiting block 10 and a connecting rod 9. The stopper is L shape, and the upper end of stopper also is the one end cover of L shape simultaneously and establishes and fix on the optical axis, stopper and cam one-to-one, and the stopper setting is in the vicinity of cam. In the embodiment shown in the drawings, two limiting blocks on the same optical axis are positioned on the inner sides of two cams. The connecting rods are respectively connected between the limiting blocks at the front parts and the rear parts of the left optical axis and the right optical axis. The left end and the right end of the connecting rod are hinged with the corresponding limiting blocks, and the hinge point is positioned at the other end of the L shape. The lower part of stopper is equipped with the breach, and the both ends of connecting rod are located breach department just to pack the breach. The top edge 101 of the notch is planar. When the support is at a lower position, the top eave and the top surface 901 of the connecting rod can be contacted at a certain position to form interference, so that the limiting effect at the position is realized, and when the support is at the highest position, the left side surface or the right side surface of the limiting block synchronously rotates to a horizontal or nearly horizontal direction along with the optical axis and is contacted with the top surface 901 of the connecting rod to form interference, so that the limiting effect at the position is realized. The two positions of the limiting block, which play a limiting role, respectively correspond to the two extreme corner positions of the handle, and also correspond to the start and stop positions of the rotatable angle range of the optical axis. When the bracket is at the highest position, the lifting mechanism and the rotating mechanism can be kept still by combining the downward pressure formed by the dead weight of the assembled frequency converter on the working platform, and thus the locking function is realized. When the top eave is in a parallel state with the top surface 901 of the connecting rod, a gap 17 is maintained between the top eave and the top eave. The size of the gap determines the size of the rotatable angle range of the optical axis and the handle, whereas the size of the rotatable angle range of the optical axis and the handle can be adjusted by changing the size of the gap.

The notches on the two limiting blocks connected to the two ends of the same connecting rod are arranged in tandem, so that the upper limit of the connecting rod in the front-rear direction is located between the left limiting block and the right limiting block, and meanwhile, the two limiting blocks limit the relative movement of the two optical axes in the front-rear direction.

The top eave 101 is preferably perpendicular to the left and right sides 102 of the limiting block, and the rotatable angle range of the optical axis and the handle is slightly larger than 90 degrees due to the gap 17.

The handle has one, and the handle is fixed in the front end or the rear end of one optical axis among them, and is located the outside of frame. The handle rotates the optical axis connected with the handle, and the connecting rod transmits kinetic energy to the other optical axis to drive the other optical axis to synchronously rotate.

The operation method of the invention is as follows: the water-cooled frequency converter base plate to be assembled is placed on the working platform 1, the frequency converter components are installed one by one from bottom to top, the frequency converter is required to be rotated by a certain angle or moved by a certain distance in the assembling process, the handle 6 can be operated by one hand to rotate anticlockwise by 90 degrees, the cam 8 is driven to jack up the support 4 provided with the balls 3 by rotating the optical axis 11, the balls 3 penetrate through the guide holes to protrude out of the working platform 1, and the dead weight of the assembled frequency converter, the connecting rod 9 and the limiting block 10 are utilized to complete locking. Therefore, the rolling friction of the balls 3 can be utilized to rotate or horizontally move the frequency converter to replace crane lifting operation, and assembly and turnover tasks can be rapidly completed. After the operation is completed according to the requirement, the single-hand operation handle 6 is rotated clockwise for 90 degrees, the optical axis 11 is utilized to drive the cam 8 to drop the support 4 provided with the balls 3, the balls 3 are lower than the working platform 1, the bottom plate of the water-cooling frequency converter and the table top of the working platform 1 form plane lamination again, the friction between the bottom plate and the table top is increased, the relative static stable state of the bottom plate and the working platform is ensured in the assembly process, the assembly work can be continued, and the assembly safety is ensured.

The invention can be used for turnover of the heavy-duty frequency converter for the coal mining machine in the assembly process, and can also be applied to assembly of other similar products.

Claims

1. A liftable ball platform which characterized in that: comprises a frame, a working platform arranged on the top surface of the frame, and a lifting mechanism and a rotating mechanism arranged below the working platform, wherein the lifting mechanism comprises a guide seat, balls and a bracket, the guide seat is arranged on the bottom surface of the working platform, all guide holes on the guide seat are in one-to-one correspondence and coaxial with all limit holes on the working platform, the balls are arranged on the bracket, the balls are in one-to-one correspondence with the guide holes, the bracket is positioned below the guide seat, the rotating mechanism comprises an optical axis, a cam and a handle, the two ends of the optical axis are rotationally connected on the frame, the cam is fixed on the optical axis, the bracket is supported on the cam, the handle is fixed at one end of the optical axis, a locking mechanism is further arranged below the working platform, the locking mechanism comprises a limiting block and a connecting rod, the limiting block is L-shaped, the upper end of the limiting block is also L-shaped, one end of the limiting block is fixed on the optical axis, the limiting block corresponds to the cam one by one, the limiting block is arranged near the cam, one connecting rod is respectively connected between the limiting blocks at the front parts and the rear parts of the left optical axis and the right optical axis, the left end and the right end of the connecting rod are hinged with the corresponding limiting blocks, the hinging point is positioned at the other end of the L-shape, the lower part of the limiting block is provided with a notch, the two ends of the connecting rod are positioned at the notch, the top eave of the notch is a plane, when the bracket is positioned at the lower position, the top eave contacts with the top surface of the connecting rod to form interference, when the bracket is positioned at the highest position, the left side surface or the right side surface of the limiting block contacts with the top surface of the connecting rod to form interference, when the top eave is positioned at the parallel state with the top surface of the connecting rod, a gap is kept between the left side and the right side surface of the limiting block, the notches on the two limiting blocks connected to the two ends of the same connecting rod are arranged in tandem.

2. The liftable ball platform of claim 1, wherein: the front end and the rear end of the optical axis are respectively provided with a shaft sleeve with radial bosses, the shaft sleeves are positioned on the inner side of the frame, and the optical axis is axially limited relative to the frame through the shaft sleeves.

3. The liftable ball platform of claim 2, wherein: the front end and the rear end of the optical axis are respectively fixedly provided with one cam, and two shaft sleeves on the same optical axis are positioned at the outer sides of the two cams.

4. A liftable ball platform as claimed in claim 3, wherein: the optical axis is parallel to the left and right.

5. The liftable ball platform of claim 4, wherein: the guide seats are in a long and thin strip shape, are arranged in a plurality of ways and are arranged side by side at intervals, and a plurality of guide holes are formed in each guide seat at intervals along the front-back direction.

6. The liftable ball platform of claim 5, wherein: the lifting mechanism further comprises a sliding plate, the sliding plate is a flat plate fixed below the support and used for lifting the support, and the sliding plate is in contact with the four cams to form a four-point supporting structure.

7. The liftable ball platform of claim 1, 2, 3, 4, 5 or 6, wherein: the frame comprises a front side plate, a rear side plate, a left side plate and a right side plate, wherein the front end and the rear end of the optical axis are respectively and rotatably connected to the front side plate and the rear side plate.

8. The liftable ball platform of claim 1, 2, 3, 4, 5 or 6, wherein: the top eave is perpendicular to the left side surface and the right side surface of the limiting block.

9. The liftable ball platform of claim 8, wherein: the handle has one, and the handle is fixed in the front end or the rear end of one optical axis among them, and is located the outside of frame.