CN214922283U

CN214922283U - Precise lifting mechanism

Info

Publication number: CN214922283U
Application number: CN202121140219.3U
Authority: CN
Inventors: 李雪松; 林龙淼; 刘宇宁
Original assignee: Weihai Weimilling Precision Cnc Co ltd
Current assignee: Weihai Weimilling Precision Cnc Co ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2021-11-30
Anticipated expiration: 2031-05-26

Abstract

A precision lifting mechanism is applied to a machine tool to realize lifting. It includes: the base comprises a fixed seat and a movable seat, the movable seat is rotatably connected with the fixed seat, and a driving mechanism for driving the movable seat to rotate in a horizontal plane is arranged on the fixed seat; the upper surface of the movable seat comprises three driving surfaces which are concentrically arranged, and points on the driving surfaces gradually rise along the circumferential direction; the lifting platform is arranged between the lifting platform and the base along the vertical direction in a relative moving mode, three supporting legs are fixed to the bottom of the lifting platform, rollers are arranged at the bottoms of the supporting legs, the rollers are in one-to-one correspondence with the driving surfaces, the rollers are always in contact with the corresponding driving surfaces, and the heights of the three rollers are always kept consistent. The utility model provides a pair of precision lifting mechanism, simple structure, convenient to use through the rotation of sliding seat in the horizontal plane, can be in order to realize the altitude mixture control to the elevating platform, and the surface profile of driving surface can ensure the lifting precision of elevating platform.

Description

Precise lifting mechanism

Technical Field

The utility model belongs to the technical field of the lathe technique and specifically relates to use an accurate elevating system on lathe.

Background

The machine tool is a processing device with higher precision, and a lifting mechanism is often used on the machine tool to meet certain processing requirements. Lifting mechanisms in the prior art are more in types, but most of the lifting mechanisms are structurally responsible.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a simple structure's accurate elevating system for use realizes going up and down on the lathe.

The utility model provides a technical scheme that its technical problem adopted is: a precision lifting mechanism is characterized by comprising:

the base comprises a fixed seat and a movable seat, the movable seat is rotatably connected with the fixed seat, and a driving mechanism for driving the movable seat to rotate in a horizontal plane is arranged on the fixed seat; the upper surface of the movable seat comprises three driving surfaces which are concentrically arranged, and points on the driving surfaces gradually rise along the circumferential direction;

the lifting platform is arranged between the lifting platform and the base along the vertical direction in a relative moving mode, three supporting legs are fixed to the bottom of the lifting platform, rollers are arranged at the bottoms of the supporting legs, the rollers are in one-to-one correspondence with the driving surfaces, the rollers are always in contact with the corresponding driving surfaces, and the heights of the three rollers are always kept consistent.

Furthermore, the driving mechanism comprises a motor fixed on the fixed seat, a worm fixed at the output end of the motor, a worm wheel meshed with the worm, a gear coaxially arranged with the worm wheel, and a gear ring meshed with the gear and fixedly connected with the movable seat.

Furthermore, the fixed seat and the movable seat are arranged inside and outside, and a bearing is arranged between the outer wall of the fixed seat and the inner wall of the movable seat.

Furthermore, a vertical guide rod is arranged on the fixed seat, and a sliding rod in sliding connection with the guide rod is arranged at the bottom of the lifting platform.

Further, the guide bars are three which are evenly arranged along the circumferential direction.

Furthermore, the whole fixed seat is circular, the outer diameter of the upper part of the fixed seat is smaller than the outer diameter of the middle part of the fixed seat, and the outer diameter of the upper part of the fixed seat is larger than the outer diameter of the lower part of the fixed seat.

Furthermore, a bottom plate is fixed at the bottom of the fixed seat, and the motor is fixed on the bottom plate.

The utility model has the advantages that: the utility model provides a pair of precision lifting mechanism, simple structure, convenient to use through the rotation of sliding seat in the horizontal plane, can be in order to realize the altitude mixture control to the elevating platform, and the form of driving face

Drawings

FIG. 1 is a schematic top view of the present invention;

fig. 2 is a second schematic top view of the present invention;

FIG. 3 is a top view of the base;

FIG. 4 is a cross-sectional view of the base;

FIG. 5 is a bottom view of the lift table;

FIG. 6 is a schematic view of a leg;

FIG. 7 is a front view of the lift table;

FIG. 8 is a top view of three guide rods disposed on the base;

FIG. 9 is a schematic view of a roller;

in the figure: the device comprises a fixed seat 1, a guide rod 11, a bottom plate 12, a bearing 13, a movable seat 2, a driving surface 21, a lifting platform 3, a supporting leg 31, a sliding rod 32, a roller 33, a gear ring 4, a gear 41, a worm wheel 42 and a worm 43.

Detailed Description

As shown in fig. 1 to 9, the present invention mainly includes a fixed base and a lifting platform 3, and the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, the base includes a fixed seat 1 and a movable seat 2, as shown in fig. 3 and 4, the fixed seat 1 is wholly circular, the outer diameter of the middle upper part of the fixed seat is large, the outer diameter of the lower part of the fixed seat is small, the upper part of the fixed seat is of a hollow structure, the upper surface of the fixed seat is open, a guide rod 11 which is vertically arranged is fixed in the inner cavity of the fixed seat, and the lower end of the guide rod is arranged in the inner cavity of the fixed seat and is fixedly connected with the fixed seat. The guide rod and the fixed seat are coaxially arranged, and a bottom plate 12 is fixed at the bottom of the fixed seat. The movable seat 2 is integrally in a circular ring structure, the upper surface of the movable seat comprises three driving surfaces 21, the driving surfaces are circular rings, and the three driving surfaces are concentrically arranged. The inside wall of sliding seat contacts with the lateral wall on fixing base upper portion, and the upper portion external diameter of fixing base is less than the external diameter at fixing base middle part, is equipped with bearing 13 between the middle part of fixing base and sliding seat inner wall, realizes through the bearing that the rotation of fixing base and sliding seat is connected. In order to drive the movable seat to rotate relative to the fixed seat, a driving mechanism is arranged between the fixed seat and the movable seat.

As shown in fig. 4, the driving mechanism includes a motor fixedly disposed on the bottom plate, a worm 43 fixed at the output end of the motor, a worm wheel 42 engaged with the worm, a gear 41 coaxially disposed with the worm wheel, and a gear ring 4 fixed on the inner wall of the movable seat, the gear ring is engaged with the gear, and the movable seat can be driven to rotate relative to the fixed seat under the driving of the motor. And because the existence of worm wheel and worm, can realize the locking between sliding seat and the fixing base.

The lifting platform 3 is arranged above the base, and as shown in fig. 5 and 7, the lifting platform is of a circular structure, and the outer diameter of the lifting platform is equal to that of the movable seat. A sliding rod 32 is fixed at the center of the bottom of the lifting platform, the sliding rod is of a hollow structure, the upper end of the guide rod extends into the inner cavity of the sliding rod, and therefore sliding connection between the sliding rod and the guide rod is achieved, and the lifting platform can move up and down relative to the base. As shown in fig. 5 and 6, three legs 31 are fixed to the lower surface of the elevating platform, and the legs are provided perpendicular to the elevating platform. The three supporting legs are long, the bottom of each supporting leg is rotatably provided with a roller 33, the three rollers are in one-to-one correspondence with the three driving surfaces, the rollers are in contact with the corresponding driving surfaces, and the rollers are arranged right above the corresponding driving surfaces. The driving surface is non-planar, the driving surface is provided with a highest point and a lowest point, and the highest point and the lowest point of the driving surface are in smooth transition. When the roller is in contact with the lowest point of the driving surface, the height of the lifting platform is lowest; when the roller contacts with the highest point of the driving surface, the height of the lifting platform is highest. When the three rollers are contacted with the corresponding driving surfaces, the height positions of the three rollers are always kept consistent. The three supporting legs are all located on the radial lines of the lifting table, and included angles between every two of the three radial lines are 120 degrees. Because the heights of the three rollers are always consistent, the lifting platform is always in the horizontal plane. When the sliding seat rotates relative to the fixed seat, the sliding seat rotates in the horizontal plane, the roller keeps in contact with the driving surface and drives the supporting legs and the lifting platform to move up and down along with the rotation of the sliding seat, and therefore lifting is achieved. Under the matching action of the guide rod and the slide rod, the guide of the up-and-down movement of the lifting platform is realized. As shown in fig. 8, the number of the guide rods is three, and the three guide rods are uniformly arranged along the circumferential direction. Correspondingly, three sliding rods are arranged at the bottom of the lifting platform, the sliding rods correspond to the guide rods one to one, and the corresponding sliding rods are connected with the guide rods in a sliding mode.

The guide rod can be round or square, and a sliding groove with the same outer diameter as the guide rod is arranged in the sliding rod. As shown in fig. 9, the thickness of the roller is not too large, and the side wall of the roller is arc-shaped, so that the roller is in point contact with the driving surface, and the precision of adjusting the height of the lifting platform can be ensured.

Claims

1. A precision lifting mechanism is characterized by comprising:

2. A precision lifting mechanism according to claim 1, wherein the drive mechanism comprises a motor fixed to the fixed base, a worm fixed to the output of the motor, a worm gear engaged with the worm, a gear coaxially disposed with the worm gear, and a ring gear engaged with the gear and fixedly connected to the movable base.

3. A precision lifting mechanism according to claim 1, wherein the fixed and movable carriages are internally and externally arranged and a bearing is arranged between the outer wall of the fixed and inner walls of the movable carriage.

4. A precision lifting mechanism according to claim 3, wherein a vertical guide bar is provided on the fixed base, and a slide bar slidably connected to the guide bar is provided on the bottom of the lifting platform.

5. A precision lifting mechanism according to claim 4, wherein the number of the guide rods is three and is uniformly arranged in the circumferential direction.

6. A precision lifting mechanism according to claim 1, wherein the holder is generally circular, the outer diameter of the upper portion of the holder being smaller than the outer diameter of the middle portion of the holder, the outer diameter of the upper portion of the holder being larger than the outer diameter of the lower portion of the holder.

7. A precision lifting mechanism according to claim 1, wherein a base plate is fixed to the base of the mounting base, and the motor is fixed to the base plate.