CN215626513U

CN215626513U - Liftable telescopic machanism

Info

Publication number: CN215626513U
Application number: CN202121466439.5U
Authority: CN
Inventors: 罗唯烜; 江华诚; 邓世翚
Original assignee: Wuhan Dawson Aerospace Technology Co ltd
Current assignee: Wuhan Dawson Aerospace Technology Co ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-01-25
Anticipated expiration: 2031-06-30

Abstract

The utility model discloses a lifting telescopic mechanism, which comprises: the lifting part is movably connected with the base and can move in a first direction relative to the base, and the first direction at least has an orthogonal decomposition direction and is in a vertical direction; the self-adaptation contact site includes a movable block at least, the up side of movable block can with by the bottom surface contact of lift object, the downside of movable block with lift portion is articulated, the downside of movable block with lift portion is ball joint or axle hinge. This liftable telescopic machanism adopts to set up rather than articulated movable block in the portion of going up and down, uses the up end of movable block and the lower terminal surface contact by the lift object, when the bottom surface of being lifted the object is uneven, the movable block can the micro-swing in order to adapt to the unevenness by the lift object bottom surface.

Description

Liftable telescopic machanism

Technical Field

The utility model relates to the technical field of lifting equipment, in particular to a lifting telescopic mechanism.

Background

I department's prior design's liftable telescopic machanism (nonstandard jacking machine of lifting equipment), including the motor lead screw, have the vice slip table of screw nut, the grudging post, the motor is installed in the top of grudging post, the lead screw is vertical to be arranged, and rotatory by motor drive, slip table and grudging post swing joint, the relative grudging post of slip table slides in vertical direction, the lead screw is connected with the screw nut of slip table is vice to cooperate, the rotatory relative grudging post of drive slip table of motor drive lead screw slides from top to bottom, the slip table has a cantilever beam structure that extends, the up end through the cantilever beam carries out the jacking to the heavy object.

In the process of online equipment practical use, sometimes the bottom surface of the lifted object is not smooth, so that the effective contact area of the lifted object and the cantilever beam is small, and the sliding of a heavy object is easy to occur in the lifting process, thereby causing safety accidents.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the technical defects and provide a lifting telescopic mechanism, which can enable a cantilever beam to be adaptive to the contact surface of a lifted object by changing the structure of the contact surface of the cantilever beam and the lifted object.

In order to achieve the above technical object, the technical solution of the present invention provides a liftable telescopic mechanism, comprising: the lifting part is movably connected with the base and can move in a first direction relative to the base, and the first direction at least has an orthogonal decomposition direction and is in a vertical direction; the self-adaptive contact part at least comprises a movable block, the upper side surface of the movable block can be in contact with the bottom surface of an object to be lifted, and the lower side of the movable block is hinged to the lifting part.

Compared with the prior art, the utility model has the beneficial effects that: this liftable telescopic machanism adopts to set up rather than articulated movable block in the portion of going up and down, uses the up end of movable block and the lower terminal surface contact by the lift object, when the bottom surface of being lifted the object is uneven, the movable block can the micro-swing in order to adapt to the unevenness by the lift object bottom surface.

Drawings

Fig. 1 is a schematic view of a first perspective three-dimensional structure of an embodiment of a lifting telescopic mechanism provided by the utility model;

fig. 2 is a schematic view of a second perspective structure of an embodiment of the liftable telescopic mechanism provided by the utility model;

FIG. 3 is a schematic view of a partial cross-sectional structure of an angle slightly-biased limiting part in the lifting mechanism according to the present invention;

fig. 4 is a schematic view of a suspension type connection structure at the upper end of a lead screw in the lifting telescopic mechanism provided by the utility model.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 4, the present embodiment provides a lifting and retracting mechanism, including: the lifting device comprises a base 1, a lifting part 2 and an adaptive contact part, wherein the lifting part 2 is movably connected with the base 1, and the lifting part 2 can move in a first direction relative to the base 1, and the first direction at least has an orthogonal decomposition direction and is in a vertical direction; the self-adaptive contact part at least comprises a movable block 3, the upper side surface of the movable block 3 can be contacted with the bottom surface of an object to be lifted, and the lower side of the movable block 3 is hinged to the lifting part 2.

This liftable telescopic machanism adopts to set up rather than articulated movable block 3 on lift portion 2, uses the up end of movable block 3 and the lower terminal surface contact by the lift object, and when the bottom surface of being lifted the object is uneven, movable block 3 can the micro-swing in order to adapt to the unevenness by the lift object bottom surface.

Lift portion 2 includes lift portion support 21 and lift portion slip table 22, lift portion slip table 22 with lift portion support 21 swing joint, just lift portion slip table 22 can be relative lift portion support 21 moves in the second direction, the second direction has an orthogonal decomposition direction at the horizontal direction at least, this embodiment, the first direction is vertical direction promptly, the second direction is the horizontal direction, during concrete implementation, the first direction also can have certain inclination relative to the vertical direction, the second direction also can have certain inclination relative to the horizontal direction, above-mentioned design all does not break away from this technical scheme's technical conception.

The upper side surface of the movable block 3 is provided with an anti-slip structure, specifically, the anti-slip structure can be an anti-slip rubber layer arranged on the upper side surface of the movable block, and can also be suitable for a tooth-shaped protrusion integrally formed with the movable block 3, the tooth-shaped protrusion enables the surface friction coefficient of the movable block to be increased from 0.10 to 0.18, safety in lifting of equipment is guaranteed, the specific forming process of the tooth-shaped protrusion can be that a plurality of transverse grooves and longitudinal grooves which are arranged in a staggered mode with the plurality of transverse grooves are milled on the upper end surface of the movable block, and the plurality of transverse grooves and the plurality of longitudinal grooves divide the upper end surface of the movable block into a plurality of square protrusions which are arranged in a matrix mode.

The downside of the movable block 3 is ball-hinged or shaft-hinged with the lifting part, in this embodiment, the shaft is hinged, the lifting telescopic mechanism further comprises a slightly-biased angle limiting part, the slightly-biased angle limiting part is connected with the movable block 3 and restricts the angle deviation range of the movable block 3 relative to the lifting part 2, so that the movable block 3 slightly inclines relative to the lifting part 2, the deflection angle of the movable block 3 is avoided to be too large, specifically, a V-shaped groove 22a is formed by downward sinking of the upper end surface of the cantilever end of the lifting sliding table 22, a V-shaped block 3a is fixed on the lower end surface of the movable block 3, the bottom of the V-shaped block 3a is hinged with the bottom of the V-shaped groove 22a, and the included angle between the inclined planes at the two sides of the V-shaped block 3a is smaller than the included angle between the inclined planes at the two sides of the V-shaped block 22a, the differentiated setting structure of the included angles is that the V-shaped block 3a can slightly deviate in the V-shaped groove 22a, therefore, the difference between the included angle of the two inclined surfaces of the V-shaped block 3a and the included angle of the two inclined surfaces of the V-shaped groove 22a is not easy to be too large, and the lower side of the movable block 3 can be connected with a pressure sensor.

Liftable telescopic machanism still include running gear, running gear install in the downside of basal portion 1, running gear include steering wheel 4 and with the first elastic component 5 that steering wheel 4 is connected, steering wheel 4 set up in the downside of basal portion 1 is worked as lift portion 2 does not receive when being lifted the decurrent pressure of object, the downside edge of the outline of steering wheel 4 is located the below of the downside edge of the outline of basal portion 1 is worked as lift portion 2 receives when being lifted the decurrent pressure of object, the downside edge of the outline of steering wheel 4 with the downside edge of the outline of basal portion 1 is close to each other in vertical direction.

The running mechanism comprises a follow-up wheel 6 and a second elastic piece 7 connected with the follow-up wheel 6, the follow-up wheel 6 is arranged at the lower side of the base 1, when the lifting part 2 is not pressed downward by the lifted object, the lower side edge of the outer contour of the follower wheel 6 is positioned below the lower side edge of the outer contour of the base part 1, when the lifting part 2 is pressed downward by the lifted object, the lower side edge of the outer contour of the follower wheel 6 and the lower side edge of the outer contour of the base 1 are close to each other in the vertical direction, the first elastic member 5 and the second elastic member 6 may be butterfly spring assemblies arranged in a stacked manner, the base part 1 is a vertical stand which is vertically arranged, the follow-up wheels and the steering wheels both adopt a universal wheel type structure, the butterfly spring assembly is used for generating elastic force for driving the steering wheel 4 and the follow-up wheel 6 to rebound downwards relative to the stand.

This embodiment still includes first driving source and second driving source, first driving source is the vertical screw nut pair mechanism who arranges, and the lead screw 8 of screw nut pair mechanism is vertical to be arranged to the upper end of lead screw 8 suspend in midair through conical bearing 9 with the top of grudging post for the upper end of grudging post bears the vice most gravity of screw nut, and it is too big to avoid the gear motor 10 pressurized load that the lead screw 8 lower extreme is connected, gear motor 10 drive lead screw 8 rotates, and the lift nut that is fixed in on the portion support 21 that goes up and down moves in vertical direction in the lead screw 8 drive.

The second driving source is a telescopic motor 11 for horizontally sliding the elevating section slide table 22 relative to the elevating section support 21.

The working principle is as follows:

1. a lower reduction motor (a reduction motor of a first driving source) arranged at the lower part of the stand is electrified to drive a lead screw of a lead screw nut pair arranged on the reduction motor to rotate according to the designed rotating speed.

2. Because the upper end and the lower end of the screw-nut pair are fixed, the screw only rotates and does not move linearly.

3. When the screw rod rotates, the lifting nut mounted on the lifting part support is driven to move linearly up and down, so that the lifting part support is driven to lift up and down synchronously.

4. The lifting part sliding table arranged in the lifting part support can only do telescopic linear motion and can not do linear motion in the vertical and horizontal directions under the driving of a telescopic motor (a second driving source).

5. When the lifting part support is synchronously lifted up and down along with the lifting nut, the lifting part sliding table and the lifting part support do linear motion up and down together, so that the lifting work of heavy objects such as vehicles is completed.

6. The guide wheel arranged on the lifting part support is used for restraining the linear motion direction of the lifting part support, so that the lifting part support can only move along the roller way of the equipment (the guide roller way welded on the vertical frame).

The scheme has the advantages that:

1. the movable block can slightly swing in the lifting part to adapt to the unevenness of the bottom surface of the lifted object.

2. The surface of the movable block is made into a tooth shape, so that the friction coefficient of the surface of the supporting head is increased from 0.10 to 0.18, and the safety of the lifting of the equipment is ensured.

3. A pressure sensor may be attached under the movable block to monitor the weight of the vehicle or weight.

4. Adopt the dish type spring wheelset effectively to alleviate equipment weight, and similar equipment mostly adopts manual hydraulic pressure fork lift. Simple structure, easy manufacture and low cost. The universal structure makes the equipment move and turn more easily, the support of the disc spring is reliable, and the defects of oil leakage, oil shortage, unreliable work and the like of the hydraulic lifting forklift can be avoided.

5. The no-load equipment automatically floats and is in a movable state, and the heavy-load equipment automatically sinks and is attached to the ground, so that the conversion operation of two working states is avoided.

6. The equipment adopts the underneath type motor, so that the overall height of the equipment is effectively reduced, the overall height of the equipment is reduced, the gravity center of the equipment is reduced, and the stability of the equipment is improved

7. The lifting screw adopts a suspension type structural design to change the stress state of the screw from compression to tension, greatly improves the stress state of the screw and avoids the instability of the screw.

The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A liftable telescopic machanism which characterized in that includes: the lifting part is movably connected with the base and can move in a first direction relative to the base, and the first direction at least has an orthogonal decomposition direction and is in a vertical direction; the self-adaptive contact part at least comprises a movable block, the upper side surface of the movable block can be in contact with the bottom surface of an object to be lifted, and the lower side of the movable block is hinged to the lifting part.

2. The mechanism of claim 1, wherein the lifting unit comprises a lifting unit support and a lifting unit sliding table, the lifting unit sliding table is movably connected to the lifting unit support, and the lifting unit sliding table can move in a second direction relative to the lifting unit support, and the second direction has at least one orthogonal decomposition direction in a horizontal direction.

3. The liftable telescopic mechanism according to claim 1, wherein an anti-slip structure is arranged on the upper side of the movable block.

4. The liftable telescopic mechanism according to claim 1, wherein the lower side of the movable block is ball-hinged or shaft-hinged to the lifting part.

5. The telescopic mechanism as claimed in claim 1, further comprising a traveling mechanism, wherein the traveling mechanism is mounted on the lower side of the base.

6. The mechanism of claim 5, wherein the traveling mechanism comprises a steering wheel and a first elastic member connected to the steering wheel, the steering wheel is disposed at the lower side of the base, when the lifting portion is not pressed downward by the lifted object, a lower side edge of an outer contour of the steering wheel is located below a lower side edge of an outer contour of the base, and when the lifting portion is pressed downward by the lifted object, the lower side edge of the outer contour of the steering wheel and the lower side edge of the outer contour of the base are close to each other in a vertical direction.

7. The liftable telescopic mechanism according to claim 5, wherein the walking mechanism comprises a follower wheel and a second elastic member connected with the follower wheel, the follower wheel is disposed at the lower side of the base, when the liftable portion is not pressed downward by the lifted object, a lower side edge of an outer contour of the follower wheel is located below a lower side edge of the outer contour of the base, and when the liftable portion is pressed downward by the lifted object, the lower side edge of the outer contour of the follower wheel and the lower side edge of the outer contour of the base are close to each other in a vertical direction.

8. The telescopic mechanism as claimed in claim 1, further comprising a slightly-biased angle limiting portion connected to the movable block and limiting a range of a deflection angle of the movable block relative to the lifting portion.