CN212655434U - Lead screw lifting device of three-dimensional workbench - Google Patents

Abstract

The application relates to a lead screw lifting device of a three-dimensional workbench, which comprises a base, a guide pillar, a top seat, a driving motor, a speed reducer, a lead screw, a nut matched with the lead screw, a platform bracket and a lifting car; the guide posts are fixedly connected with the top seat and two sides of the base, and a stable accommodating space is formed between the top seat and the base; two ends of the screw rod are respectively fixedly connected with the top seat and the middle part of the base; the platform bracket and the screw nut are arranged on the screw rod in a penetrating manner, and the screw nut is arranged between the platform bracket and the base; the lifting car is fixedly connected with the platform bracket and is arranged between the top seat and the base; the driving motor and the speed reducer are fixedly connected with the base, an output shaft of the speed reducer is in transmission connection with the lead screw, and a transmission shaft of the driving motor is in transmission connection with an input shaft of the speed reducer. Set up the dual fail-safe of lift screw and protection screw, when the unusual during operation of lift screw, through locking arc and the dog setting on the protection screw, lock the lift car, prevent that the lift car from falling.

Description

Lead screw lifting device of three-dimensional workbench

Technical Field

The application relates to the field of painting and coating, in particular to a three-dimensional workbench lead screw lifting device.

Background

In the past, a lifting structure usually adopts a motor to drive a chain to drive the chain to realize, and the chain drives the three-dimensional workbench of the chain to easily cause the falling dangerous condition when losing electric power, along with the increasing of the safety attention degree of governments and all levels of units to the working environment of human workers, the safety coefficient of the workbench is further improved by the three-dimensional workbench lifted by a lead screw.

Disclosure of Invention

According to one aspect of the application, a three-dimensional workbench lead screw lifting device is provided, and comprises a base, a guide pillar, a top seat, a driving motor, a speed reducer, a lead screw, a nut matched with the lead screw, a platform bracket and a lifting car; the base is parallel to the top seat, the number of the guide columns is more than two, one end of each guide column is fixedly connected with the top seat, the other end of each guide column is fixedly connected with the base and arranged between the top seat and the base, and a stable accommodating space is formed between the top seat and the base; one end of the screw rod is fixedly connected with the middle part of the top seat, and the other end of the screw rod is fixedly connected with the middle part of the base; the platform bracket is arranged on the screw rod in a penetrating way, the screw nut is also arranged on the screw rod in a penetrating way, and the screw nut is arranged between the platform bracket and the base; the lifting car is fixedly connected with the platform bracket and is arranged between the top seat and the base; the speed reducer is fixedly connected with the base, and an output shaft of the speed reducer is in transmission connection with the lead screw; the driving motor is fixedly connected with the base, and a transmission shaft of the driving motor is in transmission connection with an input shaft of the speed reducer; the side wall of the guide pillar, which is adjacent to one side of the screw rod, is provided with a guide rail, the guide rail is arranged along the axial direction of the screw rod, and guide rollers matched with the guide rail are arranged on two sides of the platform bracket.

In one specific embodiment, the number of the platform brackets is two, the platform bracket adjacent to the top seat is an upper platform bracket, the platform bracket adjacent to the base seat is a lower platform bracket, and the screw nut comprises a lifting screw nut and a protection screw nut; the upper platform bracket is arranged in the middle of the lifting cage, the lower platform bracket is arranged at the bottom of the lifting cage, the upper platform bracket is fixedly connected with the lifting screw nut, and the lower platform bracket is incompletely locked with the protection screw nut.

In one embodiment, the two sides of the bottom of the lower platform bracket are fixedly provided with the stop blocks, the protection nut is in an oval shape, two ends of the oval protection nut are provided with locking arcs, the distance between the stop blocks is smaller than the maximum length of the two ends of the protection nut, and the protection nut is not in contact with the lower platform bracket. In one embodiment, a guide rail along the axial direction of the screw rod is arranged on the side wall of the guide post adjacent to one side of the screw rod, and guide rollers matched with the guide rail are arranged on two sides of the platform bracket.

In one embodiment, the base is a cuboid, and the guide posts are arranged at the corners of two sides of the long edge of the cuboid base.

In one embodiment, the two sides in the base are provided with walking wheels, the two sides in the top base are provided with the same walking wheels, and the ground and the air where the three-dimensional workbench lead screw lifting device is located are provided with tracks matched with the walking wheels.

In one embodiment, the driving motor comprises a first driving motor and a second driving motor; the speed reducer comprises a first speed reducer and a second speed reducer;

the traveling wheels comprise driving traveling wheels and driven traveling wheels;

the number of the driving travelling wheels is 1, the driving travelling wheels are arranged in one side of the base, the number of the driven travelling wheels is 3, and the driving travelling wheels and the driven travelling wheels are respectively arranged in the other side of the base and the two sides of the top base;

the first driving motor and the first speed reducer are matched and connected with the lead screw, the second driving motor and the second speed reducer are matched and connected with the driving travelling wheel, and the first driving motor, the second driving motor and the second speed reducer are located on the same side and are adjacently arranged and respectively fixedly connected with the base.

In one embodiment, the distance from the screw to the two guide posts is the same, and the maximum length of the lifting car along the radial direction of the screw is smaller than the distance between the two guide posts.

In one embodiment, the lift car is a cuboid, two sides of the lift car are not sealed, the shape of the lift car is different from the shape of the top seat, the guide pillar and the base, the shapes of the lift car are the same, and the width of the side wall of the lift car on the side provided with the guide roller is smaller than the width of the side wall of the guide pillar on the side provided with the guide rail.

In one embodiment, the side wall of the unilateral guide post without the guide rail is provided with an access ladder which is perpendicular to the base.

In one embodiment, matched bearings are arranged at the connecting positions of the top seat, the base and the screw rod, the guide rollers and the walking wheels.

According to another aspect of the application, a three-dimensional workbench telescoping device is provided, and is installed on a lifting car of a three-dimensional workbench lead screw lifting device, and connecting pieces and connecting seats connected with the three-dimensional workbench telescoping device are respectively installed on the top and the bottom of the lifting car.

The three-dimensional workbench lead screw lifting device has the beneficial effects that through the double insurance of the lifting screw nut and the protection screw nut, when the lifting screw nut works abnormally, the lifting car is locked through the arrangement of the locking arc on the protection screw nut and the stop block, and the lifting car is prevented from falling. The setting of guide rail, direction gyro wheel has effectively increased the relative stability and the complete machine rigidity of lift car when going up and down, makes the security that has effectively improved the three-dimensional workstation lead screw elevating gear of this application.

Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the application and, together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic structural diagram of a main body of a three-dimensional workbench screw lifting device according to an embodiment of the present application;

FIG. 2 is a partial schematic structural view of a three-dimensional table screw lifting device according to an embodiment of the present application;

FIG. 3 is a partial schematic structural view of a three-dimensional table screw lifting device according to another embodiment of the present application;

fig. 4 is a side view of the elevator car and three-dimensional table retractor of fig. 3;

FIG. 5 is a schematic structural diagram of a lower platform bracket of a three-dimensional workbench lead screw lifting device according to another embodiment of the present application;

fig. 6 is a partial bottom view of the three-dimensional table screw lifting device of fig. 5 according to another embodiment of the present application.

Detailed Description

Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention or for simplicity in description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present application. It will be understood by those skilled in the art that the present application may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present application.

Fig. 1 is a schematic view of a three-dimensional table screw lifting device 1 according to an embodiment of the present application, fig. 2 is a partial schematic view of the three-dimensional table screw lifting device 1 according to the embodiment of the present application, fig. 3 is a partial front view of the three-dimensional table screw lifting device 1 according to another embodiment of the present application, fig. 4 is a side view of a lifting car 90 and a three-dimensional table telescoping device 2 in fig. 3, fig. 5 is a structural schematic view of a lower platform bracket 82 of the three-dimensional table screw lifting device 1 according to another embodiment of the present application, and fig. 6 is a partial bottom view of the three-dimensional table screw lifting device 1 according to another embodiment of the present application in fig. 5.

As shown in fig. 1, the three-dimensional table screw lifting device 1 includes: the lifting device comprises a base 10, guide pillars 20 symmetrically arranged on two sides of the base 10, a top seat 30, a driving motor 40, a speed reducer 50, a lead screw 60 arranged at the central positions of the top seat 30 and the base 10, a nut 70 matched with the lead screw 60, a platform bracket 80 axially moving along the lead screw 60 and a lifting car 90 fixed on the platform bracket 80;

the top seat 30 and the base seat 10 are parallel to each other, the lead screw 60 is installed to be perpendicular to the base seat 10, bearing holes are formed in the centers of the top surface of the base seat 10 and the bottom surface of the top seat 30 and are matched with the lead screw 60, a through hole is formed in the axial center of the platform bracket 80 along the lead screw 60, the nut 70 is fixed to the bottom of the platform bracket 80, the nut 70 is communicated with the through hole, and the nut 70 and the lead screw 60 are in spiral transmission;

the driving motor 40 and the speed reducer 50 include a first driving motor 41, a first speed reducer (not shown because the first driving motor 41 blocks the drawing), and a second driving motor 42 and a second speed reducer 52 (the second driving motor 42 and the second speed reducer 52 are mentioned later), wherein the first driving motor 41 and the first speed reducer are connected to the lead screw 60 in a matching manner; the first driving motor 41 is exposed at the center of the base 10, an opening 11 is radially formed in the middle of the base 10 towards the lead screw 60, a first speed reducer is arranged inside the opening 11, the first speed reducer is connected with the first driving motor 41 through a coupler, and the first speed reducer is mechanically connected with the lead screw 60.

The first driving motor 40 drives the first speed reducer to enable the screw 60 to rotate spirally, the screw 60 drives the nut 70 to move axially along the screw 60, the nut 70 is fixedly connected with the platform bracket 80, the guide rollers 81 are arranged on two sides of the platform bracket 80 and are matched with the guide rails 21 on the guide posts 20, so that the platform bracket 80 moves axially along the screw 60, and the lifting car 90 moves axially along the screw 60 due to the fixed connection of the platform bracket 80 and the lifting car 90.

In fig. 1-4, from top to bottom, in this embodiment, the top surface of the base 10 and the center of the bottom surface of the top base 30 are provided with bearing holes matching with the lead screw 60, the front end to the rear end of the base 10 is provided with an opening 11, a first speed reducer is placed inside the opening 11, where it is noted that the first driving motor 41 is a motor with a brake inside to prevent the elevator car 90 from falling too fast when power is lost, the first speed reducer is a worm gear speed reducer with a self-locking function, one end of the first speed reducer is horizontally fixed with the first driving motor 41, the first driving motor 41 is transmitted to the first speed reducer through a coupler, the worm gear in the first speed reducer changes the transmission direction by 90 degrees, specifically, the worm gear output is an output shaft rotating perpendicular to the base 10, the connection of the output shaft and the lead screw 60 is provided with a shaft hole, the inner wall of the shaft hole is provided with a fixing groove, the bottommost end of the screw 60 is matched with the shaft hole and the fixing key, the circumferential fixing of the output shaft of the first speed reducer and the screw 60 is realized, the driving motor 40 and the speed reducer 50 are both in the prior art, the model is not specifically limited, and a person skilled in the art can select the driving motor 40 and the speed reducer 50 which are suitable in size by himself or herself, which is not described herein. Platform bracket 80 both sides are equipped with the fixing base with lift car 90 fixed department, are equipped with the screw hole on the fixing base, and is corresponding, be equipped with the same screw hole of size on the lift car 90, and two screw hole intercommunications and position are the same, platform bracket 80 with lift car 90 bolted connection.

Further, as shown in fig. 2, a through hole is provided at the center of the elevator car 90 along the axial direction of the screw 60, and two ends of the through hole of the elevator car 90 are provided with bases processed by thickening, so as to increase the connection strength between the screw 60 and the platform bracket 80, and it is pointed out that, in order to ensure that the through hole does not interfere with the screw transmission between the screw 60 and the nut 70 to control the elevator car 90 to move up and down, the diameter of the through hole is larger than the nominal diameter of the screw 60, the base is projected to be a square along the axial direction of the screw 60, the side length of the square base is consistent with the length of the short side of the platform bracket 80 projected along the axial direction of the screw 60, four threaded holes are provided at the bottom of the base near the four corners, one end of the nut 70 fixedly connected with the platform bracket 80 is provided with a positioning seat, the positioning, t type lead screw or ball is selected for use to lead screw 60, and specific model does not do and restricts, and T type lead screw simple structure, easy maintenance, but coefficient of friction is great, and the precision can not reach higher standard, and work efficiency does not have ball high, and ball's processing cost is high, and the structure is complicated relatively, and coefficient of friction is less, and work efficiency is high, and the two respectively has the advantage, so lead screw 60's model can be considered according to specific actual conditions, does not excessively restrict here.

The connecting parts of the screw 60 and the top seat 30 and the base 10 are provided with bearings, preferably, the bearings are single-row roller bearings, because the screw 60 moves in the circumferential direction perpendicular to the base 10, the bearings mainly bear radial and axial combined loads mainly comprising radial loads, and because the screw 60 plays a role in driving the platform bracket 80 to move the lifting car 90 up and down in the three-dimensional workbench screw lifting device 1 of the present application, the limit rotating speed of the screw 60 is not specifically limited, and the three-dimensional workbench screw lifting device 1 of the present application is ensured to be mainly safe.

In one embodiment, as shown in fig. 4-5, the number of the platform brackets 80 is two, the platform bracket 80 adjacent to the top base 30 is an upper platform bracket 81, the platform bracket 80 adjacent to the base 10 is a lower platform bracket 82, and the nut 70 includes a lifting nut 71 and a protection nut 72; the upper platform bracket 81 is arranged in the middle of the lifting car 90, the lower platform bracket 82 is arranged at the bottom of the lifting car 90, the upper platform bracket 81 is fixedly connected with the lifting screw nut 71, the lower platform bracket 82 is incompletely locked with the protection screw nut 72, a stop block is fixedly arranged in the middle of the lower platform bracket 82, the shape of the protection screw nut 72 is not specifically limited, two ends of the protection screw nut 72 are locking arcs, the distance between the stop blocks 820 is smaller than the maximum length of two ends of the protection screw nut 72, and the protection screw nut 72 is not in contact with the lower platform bracket 82.

In this embodiment, the lifting screw 71 and the upper platform bracket 81 are both provided with a mounting seat, the lifting screw 71 and the upper platform bracket 81 are screwed and fixed through the mounting seat, the lifting screw 71 is a driving screw, once the screw 60 rotates, the lifting screw 71 moves axially along the screw 60, and the upper platform bracket 81 and the lifting car 90 fixed on the upper platform bracket 81 are driven to lift; further, as shown in fig. 6, the clockwise rotation of the screw 60 is the ascending direction of the elevator car 90, the counterclockwise rotation is the descending direction of the elevator car 90, the lower platform bracket 82 and the protection nut 72 are not completely locked, the middle part of the lower platform bracket 82 is provided with a stop 820, the stop 820 is fixed with the lower platform bracket 82 in a threaded manner, two ends of the protection nut 72 are locking arcs, the distance between the stops 820 is smaller than the maximum length of two ends of the protection nut 72, it should be noted that the shape of the protection nut 72 is not specifically limited, so that the protection nut 72 can only rotate within a preset angle range, therefore, the installation of the protection nut 72 at the screw 60 has a reserved height, the protection nut 72 can contact with the stop 820 but not contact with the lower platform bracket 82, that is the protection nut 72 is not subjected to the pressure of the lower platform bracket 82 at ordinary times, and only acts as a follower nut 72 to follow below the lower platform bracket 82, is not affected by gravity from the elevator car 90.

When the three-dimensional workbench lead screw lifting device 1 of the embodiment of the application is in an unexpected situation or the lifting nut 71 is used for too long time and is seriously worn, the lifting car 90 is rapidly fallen by gravity, the lifting nut 71 cannot normally work at the moment, the protection nut 72 is worn along with the use, but is not subjected to the gravity from the lifting car 90, the protection nut 72 is lighter in wear degree compared with the lifting nut 71, the protection nut 72 rotates anticlockwise, the lifting car 90 starts to fall, the locking is performed by a locking arc on the protection nut 72 and a stop block 820 fixedly connected with the lower platform bracket 82, and the locking is completed when the lifting car 90 just starts to fall. It should be noted that the maximum length of the protection screw 72 needs to be greater than the distance between the stops 820 so that the protection screw 72 can be locked.

As shown in fig. 2, in one embodiment, the base 10 is a cuboid, the guide posts 20 are disposed at two side corners of a long side of the cuboid base 10, the guide rails 21 moving along the axial direction of the lead screw 60 are disposed on the side walls of the guide posts 20 close to one side of the lead screw 60, the guide rollers 91 matching with the guide rails 21 are disposed on two sides of the platform bracket 80, the height of the guide posts 20 is less than 6 meters, and the height of the guide posts 20 is 2-4 times of the height of the elevator car 90.

In this embodiment, because three-dimensional workstation lead screw elevating gear 1 of this application embodiment is perpendicular to level ground sets up, guide pillar 20 is high, and the totality is rectangle along lead screw 60 axial, makes its focus on the high side, and two guide pillars 20 intervals are greater than the length of lift car 90, and base 10 such as cuboid base 10 compare square or round platform body have better stability, and save space more, makes placing of three-dimensional workstation lead screw elevating gear 1 of this application more reasonable. It should be noted that the base 10, the guide pillar 20, the platform bracket 80 of the top seat 30 and the lifting car 90 are all made of metal materials with high strength, and may be made of the same material or different materials, and it is only necessary to ensure that the structural strength and the overall rigidity of the three-dimensional workbench screw rod lifting device 1 according to the embodiment of the present invention are ensured. Preferably, the guide post 20 can be in an "i" shape along the axial projection of the screw 60, two opposite surfaces of the i-shaped guide post 20 are completely symmetrical, that is, two surfaces of the side wall of the guide post 20 can be used as guide rails 21 matched with the guide rollers 91, and the i-shaped guide post 20 can save more materials in the aspect of processing and reduce the cost on the basis of ensuring the strength of the guide post 20.

Further, the bearing on the guide roller 91 is a self-aligning roller bearing, and the screw nut 70 is installed at the center of the platform bracket 80 to play a role in lifting and mainly supporting the lifting car 90, but long-time support can greatly reduce the abrasion of the screw nut 70 and influence the service life, so the total horizontal length of the platform bracket 80 and the guide roller 91 is slightly larger than the distance between the guide rails 21, the pretightening force between the platform bracket 80 and the guide rails 21 is increased, and the function of assisting the screw nut 70 to support the platform bracket 80 and the lifting car 90 is radially played from the screw nut 60, the self-aligning roller bearing is characterized by high radial load capacity and is suitable for working under heavy load, and the guide roller 91 is positioned in the guide rails 21 and is not subjected to the axial force of the screw nut 60, so the self-aligning roller bearing is suitable for being used on the. The self-aligning roller bearing overcoat has the uide bushing (not shown in the figure), the uide bushing is the hollow square body, the square body can be put into guide rail 21, the uide bushing mainly plays the guide effect for guide roller 91, make guide roller 91 along lead screw 60 axial linear motion in guide rail 21, do not take place the skew, thereby guaranteed the relative stability and the whole rigidity of lift car 90 at the lift in-process, make lead screw 60 not receive the interference of yawing force and moment simultaneously, reach lift car 90 steady, safe effect at the lift in-process. It should be pointed out that wear-resisting material is chooseed for use to the uide bushing, specifically do not do the injecing, and is preferred, and the uide bushing that the uide bushing is brass uide bushing, and the uide bushing that the brass material constitutes not only is wear-resisting, and the hardness is higher, and the material cost is lower relatively moreover, easily production and processing, and is not fragile.

Specifically, the height of the guide post 20 is less than 6 meters, the height of the guide post 20 is 2-4 times of the height of the lifting car 90, and an excessively high guide post 20 may reduce the overall strength of the three-dimensional workbench screw lifting device 1 of the embodiment of the present application, so that accidents or other dangerous situations are easily generated, moreover, the working platform within 6 meters can ensure that the related personnel can smoothly and conveniently complete most of the working tasks, the working environment with higher height can be unfavorable for the working of the lifting cage 90, or a large amount of materials are used for reinforcement, so that the danger coefficient of the work is greatly increased, unnecessary cost is increased, and the work is not paid, so that other methods are used for work, wherein, be provided with maintenance ladder (not shown in the figure) on the guide pillar 20 lateral wall that does not set up guide rail 21, maintenance ladder and base 10 mutually perpendicular make things convenient for maintenance personal to the maintenance and the maintenance of the three-dimensional workstation lead screw elevating gear 1 of this application.

In one embodiment, as shown in fig. 1, the base 10 is provided with walking wheels 12 on two sides inside, the top base 30 is provided with the same walking wheels 12 (not shown) on two sides inside, and the three-dimensional table screw lifting device 1 is provided with a track (not shown) matched with the walking wheels on the ground and in the air. The driving motor 40 and the speed reducer 50 comprise a first driving motor 41, a first speed reducer, a second driving motor 42 and a second speed reducer 52, the traveling wheels 12 comprise driving traveling wheels 121 and driven traveling wheels 122, the number of the driving traveling wheels 121 is one, the driving traveling wheels are arranged on one side of the base 10, and the number of the driven traveling wheels 122 is 3. The first driving motor 41 and the first speed reducer are matched and connected with the lead screw 60, the second driving motor 42 and the second speed reducer 52 are matched and connected with the driving travelling wheel 121, and the first driving motor 41, the second driving motor 42 and the second speed reducer 52 are located on the same side and are adjacent and fixed.

In this embodiment, the first driving motor 41, the first speed reducer and the second speed reducer 52 are located on the same side and are arranged adjacently, so that maintenance personnel can conveniently maintain and overhaul the wires, and the wires of the electronic mechanical components can be conveniently bundled, so that the wire well connected with the three-dimensional workbench lead screw lifting device 1 is provided with a plurality of wires. Second driving motor 42 sets up beside first driving motor 41, second speed reducer 52 and second driving motor 42 parallel placement, link to each other through the shaft coupling, second speed reducer 52 sets up outside initiative walking wheel 121, the output shaft transmission power of second speed reducer 52 is to initiative walking wheel 121, drive all the other three driven walking wheels 122 roll again, the track with walking wheel 12 assorted is the rail, wherein, initiative walking wheel 121 sets up in base 10 one end, the walking wheel in the base 10 mainly plays the effect of supporting and removing the three-dimensional workstation lead screw elevating gear 1 of this application embodiment, and the walking wheel 12 that sets up in the footstock 30 plays the effect of direction, prevent that the three-dimensional workstation lead screw elevating gear 1 of this application embodiment from turning on one's side easily because of the focus is on the high side. The bearing of the walking wheel 12 is selected to be similar to the working environment of the bearing of the guide roller 91 and is subjected to larger radial force, so the types of the selected bearings are similar, the specific models are not limited, and a person skilled in the art can select a proper bearing to install. High strength steel is chooseed for use to steel to ensure that it can bear great pressure, low cost, and non-deformable, damage, for preventing that the track from rustting, maintainer should regularly coat rust-preventative oil on the rail, ensure leveling on track surface, the setting up of walking wheel, rail lets the three-dimensional workstation lead screw elevating gear 1 of this application embodiment can follow rail direction free movement, and does not turn on one's side, is applicable to more operational environment.

In one embodiment, as shown in fig. 3-4, the elevator car 90 is a cuboid, the elevator car 90 has the same shape and different size as the top seat 30, the guide pillar 20 and the base 10 along the lead screw 60, the width of the side wall of the elevator car 90 with the guide roller 91 is smaller than the width of the side wall of the guide pillar 20 with the guide rail 21, a three-dimensional workbench telescopic device 2 is installed in the elevator car 90, the connecting seats 92 are arranged on two sides of the bottom of the elevator car 90, and the connecting parts 93 are arranged on two sides of the top and are respectively connected with the bottom and the top of the three-dimensional workbench telescopic device 2, so that the three-dimensional workbench can move horizontally except for moving up and down, and three-axial movements of x, y and z axes are realized.

In this embodiment, the shape and size of the three-dimensional working platform frame formed by the lifting cage 90, the top seat 30, the guide post 20 and the base 10 are the same, so that the three-dimensional space in the lifting cage 90 is sufficient, and various devices and device supporting structures are easy to place, preferably, as shown in fig. 4, a three-dimensional working platform telescopic device 2 is installed on the lifting cage 90, the three-dimensional working platform telescopic device 2 is a telescopic device which is used for driving two groups of scissors forks to do the same reciprocating motion in a telescopic way by a lead screw 60, and the operation platform 200 completes further telescopic motion through an auxiliary connecting rod, so as to realize the extension and retraction of the operation platform 200. The bottoms of the two groups of scissors forks are axially fixed with the connecting seat 92 on the lifting car 90, the scissors forks move in the radial direction, the top of the scissors forks is provided with a rolling connecting piece 93, the inner wall of the lifting car 90 is provided with a sliding groove 201, and the rolling connecting piece 93 is matched with the sliding groove 201 to realize free extension and retraction of the three-dimensional workbench extension device 2. It should be pointed out that, when guaranteeing that three-dimensional workstation telescoping device 2 stretches out completely, only installing a platform bracket 80 can not satisfy three-dimensional workstation lead screw elevating gear 1's structural strength, the dangerous condition of turning on one's side takes place easily, and for guaranteeing that three-dimensional workstation lead screw elevating gear 1 structural strength of this application embodiment is enough, need install two platform brackets 80: go up platform bracket 81 and lower platform bracket 82, go up platform bracket 81 and install in lift car 90 and be close intermediate position department, lower platform bracket 82 installs in the position department of being close to lift car 90 bottom, the guide roller 91 on going up platform bracket 81 sets up the one side at neighbouring footstock 30, the guide roller 91 of lower platform bracket 82 sets up the one side at neighbouring base 10, if the interval undersize of two sets of guide roller 91 then do not have apparent difference with a set of, reprocess and extravagant material, and the interval of two sets of guide roller 91 is too big then can reduce the structural strength of the three-dimensional workstation lead screw elevating gear 1 of this application embodiment to a certain extent, reduce stability. It should also be pointed out that, when lift car 90 descends to the bottommost end, screw 70 that is in the bottom of lower platform bracket 82 can strike base 10, so install the protective sheath additional in the one end of screw 70 base 10, establish the protective sheath additional and can effectively slow down the impact force that screw 70 received, reduce the damage that the collision caused to the three-dimensional workstation lead screw elevating gear 1 overall structure of the embodiment of this application, prolong its life, the protective sheath material does not specifically limit, can absorb partial impact force to screw 70 can. The electric components in the three-dimensional workbench lead screw lifting device 1 in the embodiment of the application all adopt explosion-proof products, the explosion-proof grade reaches EXd II BT4 grade, the safety and the stability are realized, and the generated noise is low.

Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (10)

1. A three-dimensional workbench lead screw lifting device is characterized by comprising a base, a guide pillar, a top seat, a driving motor, a speed reducer, a lead screw, a nut matched with the lead screw, a platform bracket and a lifting car;

the base is parallel to the top seat, the number of the guide columns is more than two, one end of each guide column is fixedly connected with the top seat, the other end of each guide column is fixedly connected with the base and arranged between the top seat and the base, and a stable accommodating space is formed between the top seat and the base;

one end of the screw rod is fixedly connected with the middle part of the top seat, and the other end of the screw rod is fixedly connected with the middle part of the base;

the platform bracket is arranged on the lead screw in a penetrating manner, the screw nut is also arranged on the lead screw in a penetrating manner, and the screw nut is arranged below the platform bracket;

the lifting car is fixedly connected with the platform bracket, and the lifting car is arranged between the top seat and the base;

the speed reducer is fixedly connected with the base, and an output shaft of the speed reducer is in transmission connection with the lead screw;

the driving motor is fixedly connected with the base, and a transmission shaft of the driving motor is in transmission connection with an input shaft of the speed reducer;

the guide rail is arranged on the side wall of the guide post, which is adjacent to one side of the screw rod, the guide rail is axially arranged along the screw rod, and guide rollers matched with the guide rail are arranged on two sides of the platform bracket.

2. The three-dimensional workbench screw lifting device according to claim 1, wherein the number of the platform brackets is two, the platform bracket adjacent to the top seat is an upper platform bracket, the platform bracket adjacent to the base seat is a lower platform bracket, and the screw nut comprises a lifting screw nut and a protection screw nut;

the utility model discloses a lift car, including lift car, upper mounting plate bracket, lower mounting plate bracket, upper mounting plate bracket installs the middle part of lift car, lower mounting plate bracket is installed the bottom of lift car, upper mounting plate bracket with lift screw fixed connection, the protection screw sets up on the lead screw with the base has preset the height.

3. The three-dimensional workbench lead screw lifting device according to claim 2, wherein a stop matched with the protection screw nut is arranged in the middle of the lower platform bracket, locking arcs are arranged at two ends of the protection screw nut, the maximum length of the two ends of the protection screw nut is larger than the distance between the stop, and the protection screw nut is not in contact with the lower platform bracket.

4. The three-dimensional workbench screw lifting device according to claim 1, wherein the base is a cuboid, and the guide posts are arranged at two side corners of the long side of the cuboid base.

5. The three-dimensional workbench screw lifting device according to claim 3, wherein the two sides of the bottom of the base are provided with walking wheels, and the two sides of the top base are provided with the same walking wheels.

6. The three-dimensional table screw lifting device according to claim 5, wherein the driving motor comprises a first driving motor and a second driving motor; the speed reducer comprises a first speed reducer and a second speed reducer;

the travelling wheels comprise driving travelling wheels and driven travelling wheels;

the number of the driving travelling wheels is 1, the driving travelling wheels are arranged in one side of the base, the number of the driven travelling wheels is 3, and the driving travelling wheels are respectively arranged in the other side of the base and in the two sides of the top base;

the first driving motor, the first speed reducer cooperate with the screw rod connection, the second driving motor, the second speed reducer cooperate with the active walking wheel connection, the first driving motor, the second driving motor and the second speed reducer are located adjacent arrangement of homonymy, respectively with base fixed connection.

7. The three-dimensional workbench screw lifting device according to claim 1, wherein the distance from the screw to the two guide pillars is the same, and the maximum length of the lifting car along the radial direction of the screw is smaller than the distance between the two guide pillars.

8. The three-dimensional workbench screw rod lifting device according to claim 1, wherein the lifting cage is a rectangular parallelepiped, both sides of the lifting cage are not closed, the shape of the lifting cage is different from the shape of the top seat, the guide pillar and the base, and the shape of the lifting cage is the same, and the width of the side wall of the lifting cage on the side provided with the guide roller is smaller than the width of the side wall of the guide pillar on the side provided with the guide rail.

9. The three-dimensional workbench screw lifting device according to claim 5, wherein the top seat, the base and the screw are provided with matched bearings at the connecting part, the guide roller and the walking wheel.

10. The three-dimensional workbench screw lifting device according to claim 1, wherein an access ladder perpendicular to the base is provided on the side wall of the guide pillar not provided with the guide rail on one side.

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