CN115012617A

CN115012617A - Lifting device and plastering equipment

Info

Publication number: CN115012617A
Application number: CN202110245554.8A
Authority: CN
Inventors: 杨海; 谢军; 杨金; 梁统生
Original assignee: Guangdong Bozhilin Robot Co Ltd
Current assignee: Guangdong Bozhilin Robot Co Ltd
Priority date: 2021-03-05
Filing date: 2021-03-05
Publication date: 2022-09-06

Abstract

The invention discloses a lifting device and plastering equipment, wherein the lifting device comprises: a lower lifting frame; the lifting frame is slidably arranged on the lower lifting frame; the driving assembly can drive the lifting frame to do lifting motion relative to the lower lifting frame; the locking assembly comprises a locked piece, a locking piece and an unlocking piece, the locked piece is arranged on the upper lifting frame, and the locking piece and the unlocking piece are arranged on the lower lifting frame; when the ascending and descending frame is static relative to the descending frame, the locking piece locks the locked piece; when the ascending and descending frame ascends and descends relative to the descending and descending frame, the unlocking piece drives the locking piece to unlock the locked piece. The lifting frame is lifted on the lower lifting frame through the upper lifting frame, so that the height can be adjusted quickly and conveniently to adapt to different floor heights, the locking assembly is used for controlling the upper lifting frame, the operation is convenient, and the flexibility is improved.

Description

Lifting device and plastering equipment

Technical Field

The invention relates to the technical field of construction equipment, in particular to a lifting device and plastering equipment.

Background

The working environment of the plastering robot limits the height of the plastering robot, the machine cannot be made too high (not more than 1.75 meters), otherwise the machine cannot pass through shorter places such as doors, but the upright post needs to be propped against the ceiling when the plastering robot works, so the height of the upright post of the plastering robot can be changed. Some plastering robots on the market at present adjust the stand height through folding the stand (plastering robot gets into after the room artifical with two short stands and connects into a long stand, the machine will be changeed to when other room construction the manual work and tear down the first section of stand for the machine can pass through the shorter places of height such as door), and there are two big shortcomings in this kind of method: 1. the height of the whole upright post is fixed after the two truncated upright posts are connected, and the height adjustment is difficult, so that the height adjustment can not adapt to different floor heights. 2. The upright posts are required to be manually disassembled and assembled once when the upright posts are transferred to other rooms every time, so that the time and labor are wasted, and the upright posts are not flexible enough.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a lifting device, which enables an upright post to freely stretch and retract and improves adaptability and flexibility.

The invention also provides plastering equipment applying the lifting device, so that the upright post can freely stretch and retract, and the adaptability and the flexibility are improved.

According to an embodiment of the present invention, a lifting device includes: a lower lifting frame; the lifting frame is arranged on the lower lifting frame in a sliding manner; the driving assembly can drive the ascending and descending frame to do ascending and descending motion relative to the descending frame; the locking assembly comprises a locked piece, a locking piece and an unlocking piece, the locked piece is arranged on the ascending and descending frame, and the locking piece and the unlocking piece are arranged on the descending frame; when the ascending and descending frame is static relative to the descending frame, the locked piece is locked by the locking piece; when the ascending and descending frame ascends and descends relative to the descending frame, the unlocking piece drives the locking piece to unlock the locked piece.

According to the lifting device provided by the embodiment of the invention, the driving wheel is driven to rotate through the driving piece, so that the flexible piece is driven to move, and finally the upper lifting frame can be lifted on the lower lifting frame. The lifting device can limit the lifting of the lifting frame on the lower lifting frame through the locking assembly, control the lifting frame to be positioned at a preset position on the lower lifting frame, is convenient to operate, and improves the flexibility of the lifting device.

In some embodiments, the unlocking member drives the locking member to unlock the locked member only when the ascending and descending frame moves downwards relative to the descending frame; when the ascending and descending frame moves upwards relative to the descending frame, the locking piece releases the locking of the locked piece.

In some embodiments, the locked part is a rack, and the locking part is a pawl capable of swinging up and down within a preset range; when the lifting frame is upwards static relative to the lower lifting frame, the pawl is stopped against the tooth socket part of the rack; when the ascending and descending frame moves upwards relative to the descending frame, the plurality of tooth parts on the rack alternately drive the pawl to swing upwards; when the ascending and descending frame moves downwards, the unlocking piece drives the pawl to swing upwards to be separated from the tooth groove part.

In some embodiments, the unlocking member comprises: an unlocking drive having an output with a first position and a second position; the swinging piece is connected with a rotating shaft of the pawl; connect the rope, it connects to connect rope one end swing piece and other end are connected the output, the output by first position motion extremely during the second position the output orders about the locking piece removes the locking by the latch fitting.

In some embodiments, the drive assembly comprises: the driving wheel is arranged at the lower part of the lower lifting frame; the driven wheel is arranged at the upper part of the lower lifting frame; the flexible piece is sleeved on the driving wheel and the driven wheel; and the driving piece is connected with the driving wheel so as to drive the lifting frame to lift relative to the lower lifting frame.

In some embodiments, the flexure comprises: a flexure body having a first end and a second end; the connecting mechanism is detachably arranged at the bottom of the ascending and descending frame, and the first end part and the second end part are respectively arranged at the upper end and the lower end of the connecting mechanism.

In some embodiments, the connection mechanism comprises: a connection seat connected on one of the first end and the second end; a tensioning shaft slidably disposed on the connecting seat, the tensioning shaft connected to the other of the first end and the second end; and the elastic piece is arranged between the connecting seat and the tensioning shaft so that the tensioning shaft can tension the flexible piece main body.

In some embodiments, the lifting device further comprises a tensioning mechanism provided between the driven wheel and the lower lift, the tensioning mechanism comprising: the driven wheel is arranged on the fixed seat, the fixed seat is provided with a vertical sliding groove, and the lower lifting frame is provided with a limiting block arranged in the vertical sliding groove; the fastener is arranged on the fixing seat, one end of the fastener extends into the vertical sliding groove and abuts against the limiting block, and the fastener is screwed downwards so that the fixing seat moves upwards.

In some embodiments, the top of the lower lifting frame is provided with a groove, the limiting block is arranged in the groove, and the fixed seat and the driven wheel are positioned in the groove.

In some embodiments, the lower lifting frame comprises a base and a side support plate connected with the base, the driven wheel is arranged at the upper end of the side support plate, and the rotation axis of the driven wheel and the rotation axis of the driving wheel are parallel to the side support plate.

In some embodiments, the lifting device further comprises a guide mechanism disposed between the lifting frame and the side support plate, the guide mechanism comprising: the guide rails are arranged on two sides of the flexible part in the length direction of the side supporting plates; the slide block is arranged on each guide rail and connected with the side supporting plate.

A plastering apparatus according to an embodiment of the present invention comprises: the lifting device is the lifting device; and the plastering device is arranged on the ascending and descending frame.

According to the plastering equipment provided by the embodiment of the invention, the driving wheel is driven to rotate by the driving piece of the lifting device, so that the flexible piece is driven to move, and finally the upper lifting frame can be lifted on the lower lifting frame. The lifting device can limit the lifting of the lifting frame on the lower lifting frame through the locking assembly, control the lifting frame to be in a preset position on the lower lifting frame, is convenient to operate, and improves the flexibility of the lifting device.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of a lifting device according to an embodiment of the present invention;

FIG. 2 is an exploded view of the lifting device in an embodiment of the present invention;

FIG. 3 is a schematic view of a connection structure in an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 1 at I;

FIG. 5 is an enlarged view of a portion of FIG. 2 at II;

fig. 6 is a partially enlarged view of fig. 2 at the point III.

Reference numerals:

100. a lifting device;

10. a lower lifting frame; 11. a limiting block; 12. a base; 13. a side support plate; 14. a groove;

30. a driven wheel;

40. a flexible member;

41. a flexure body; 410. a first end portion; 411. a second end portion; 42. a connecting mechanism; 420. a connecting seat; 421. tensioning the shaft; 423. an elastic member; 43. a first side edge; 44. a second side edge;

50. lifting the frame; 51. a top seat; 52. a side lifter plate; 60. a drive member;

70. a locking assembly; 71. a locked member; 710. a tooth groove part; 711. a tooth portion; 72. a locking member; 73. unlocking the lock; 730. unlocking the driving piece; 731. a swinging member; 74. a hinge pin;

80. a tensioning mechanism; 81. a fixed seat; 810. a vertical chute;

90. a guide mechanism; 91. a guide rail; 92. a slide block.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial.

In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The following describes the lifting device 100 according to an embodiment of the present invention with reference to the drawings.

As shown in fig. 1 and 2, a lifting device 100 according to an embodiment of the present invention includes a lower lifting frame 10, a driving assembly, an upper lifting frame 50, and a locking assembly 70. The upper lifting frame 50 is slidably arranged on the lower lifting frame 10, and the driving component can drive the upper lifting frame 50 to do lifting motion relative to the lower lifting frame 10.

The drive assembly includes a drive wheel (not shown), a driven wheel 30, a flexible member 40 and a drive member 60. The driving wheel is arranged at the lower part of the lower lifting frame 10. The driven pulley 30 is provided at the upper portion of the lower crane 10. The flexible member 40 is sleeved on the driving wheel and the driven wheel 30, and the flexible member 40 and the driven wheel 30 move under the driving of the driving wheel. The flexure 40 is connected to the lower portion of the ascending/descending frame 50, and the stroke of ascending/descending the ascending/descending frame 50 is increased as compared with the flexure 40 connected to the other portion of the ascending/descending frame 50. The driving member 60 is connected to the driving wheel to drive the ascending and descending frame 50 to ascend and descend relative to the descending frame 10. The driving member 60 is in a straight shape or in an L shape.

The locking assembly 70 comprises a locked piece 71, a locking piece 72 and an unlocking piece 73, the locked piece 71 is arranged on the ascending and descending frame 50, and the locking piece 72 and the unlocking piece 73 are arranged on the descending frame 10; when the ascending and descending frame 50 is static relative to the lower ascending and descending frame 10, the locking piece 72 is locked by the locking piece 71, namely when the ascending and descending frame 50 is in a non-tool state, the locking piece 71 and the locking piece 72 are matched to realize self locking, so that the lower ascending and descending frame 10 can be prevented from falling after reaching a preset position, and the safety is improved; when the ascending and descending frame 50 ascends and descends relative to the descending frame 10, the unlocking piece 73 drives the locking piece 72 to unlock the locked piece 71, and the unlocking piece 73 can contact the self-locking state of the ascending and descending frame 50, so that the ascending and descending frame 50 can ascend and descend. The flexible driving assembly composed of the driving wheel, the driven wheel 30, the flexible part 40 and the driving part 60 is adopted in the embodiment, and the mortar pollution resistance is strong. And the driving piece passes through the action wheel and sets up with flexible piece 40 is perpendicular, can reduce the high space that is used for arranging the driving piece on the crane, and then can reduce the high size of crane under the unchangeable circumstances of elevating gear operation height range.

According to the lifting device 100 of the embodiment of the invention, the driving wheel is driven to rotate by the driving part 60, so as to drive the flexible part 40 to move, and finally the upper lifting frame 50 can be lifted on the lower lifting frame 10. The invention can limit the lifting of the lifting frame 50 on the lower lifting frame 10 through the locking component 70, control the lifting frame 50 to be positioned at the preset position on the lower lifting frame 10 and realize locking, has convenient operation, safety and reliability, and improves the flexibility of the lifting device 100.

In some embodiments, the unlocking member 73 is driven to unlock the locked member 71 only when the upper crane 50 moves downward with respect to the lower crane 10; when the upper lifting frame 50 moves upward relative to the lower lifting frame 10, the locking piece 72 releases the locking of the locked piece 71. For example, as shown in fig. 1, when the upper lifting frame 50 moves upward relative to the lower lifting frame 10, the unlocking member 73 is not required to unlock, and the upper lifting frame 50 can move upward, that is, the locking assembly 70 does not limit the upward movement of the upper lifting frame 50 relative to the lower lifting frame 10, and the locking assembly 70 only limits the free downward movement of the upper lifting frame 50 relative to the lower lifting frame 10, so as to avoid the free falling of the upper lifting frame 50, which is beneficial to simplifying the structure of the unlocking member 73.

As shown in fig. 4, in some embodiments, the locked member 71 is a rack, and the locking member 72 is a pawl capable of swinging up and down within a preset range; when the ascending and descending rack 50 is upwards static relative to the lower ascending and descending rack 10, the pawl is stopped against the tooth socket part 710 of the rack, the rack and the pawl are relatively static under the self-gravity factor of the ascending and descending rack 50, and the ascending and descending rack 50 is prevented from falling due to the self-gravity; when the ascending and descending frame 50 moves upwards relative to the descending frame 10, the pawl is separated from the state of the stop tooth groove part 710, the plurality of tooth parts 711 on the rack alternately drive the pawl to swing upwards, at the moment, the locking assembly 70 can not limit the ascending and descending frame 50 to move upwards, the locking assembly 70 is not required to be operated to remove the limitation on the ascending and descending frame 50, the ascending and descending frame 50 can freely ascend, and the operation steps are simplified. When the ascending and descending frame 50 moves downwards, the unlocking piece 73 drives the pawl to swing upwards to be separated from the tooth groove part 710, the pawl is separated from the state of stopping against the tooth groove part 710, at the moment, the locking state of the ascending and descending frame 50 is eliminated, the ascending and descending frame 50 can move downwards, the ascending and descending frame 50 is limited to move downwards under the instruction operation, and the safety is improved. By adopting the matching mode of the pawl and the ratchet, the locking is simple and stable, and the reliability is strong.

It should be noted that when the locking member 72 is a pawl, the pawl has a torsion spring (not shown) to drive the pawl to tend to rest against the gullet portion 710 of the rack, while ensuring that the pawl oscillates back and forth up and down within a predetermined range.

As shown in fig. 4, in some embodiments, the unlocking member 73 includes: unlocking drive 730, oscillating piece 731, connecting cord (not shown).

The unlocking actuator 730 has an output end having a first position and a second position. The swinging piece 731 is connected with the rotating shaft of the pawl, and the swinging piece 731 can drive the pawl to swing. One end of the connecting rope is connected with the swinging piece 731, the other end of the connecting rope is connected with the output end, and the output end drives the locking piece 72 to release the locked piece 71 when the output end moves from the first position to the second position. Specifically, the output end moves from the first position to the second position, the connecting rope is pulled, the connecting rope drives the swinging piece 731 to swing, finally the pawl is separated from the state of being stopped on the tooth groove part 710, the unlocking of the unlocking piece 73 to the locked piece 71 is completed, the ascending and descending frame 50 can move downwards, the method is simple, and the operation is convenient.

In some embodiments, the unlocking actuator 730 is one of a micro-electric push rod and a micro-electric rocker. For example, as shown in fig. 4, the unlocking driving member 730 is a micro electric push rod, an output end of the micro electric push rod can move up and down, the output end moves from the first position to the second position and moves from top to bottom, the connecting rope pulls the swinging member 731 to swing, and finally the pawl is disengaged from the stopping tooth groove portion 710; or, the unlocking driving member 730 is a micro electric rocker, an output end of the micro electric rocker can horizontally rotate, the output end moves from the first position to the second position and rotates from top to bottom, the connecting rope pulls the swinging member 731 to swing, and finally the pawl is separated from the state of stopping against the tooth socket part 710.

As shown in fig. 4, in some embodiments, the swinging member 731 is a rocker arm connected to the pawl by a hinge pin 74, the rocker arm swinging coaxially with the pawl.

As shown in fig. 2, in some embodiments, the flexure 40 includes: flexure body 41, attachment mechanism 42.

The flexure body 41 has a first end 410 and a second end 411. The connection mechanism 42 is detachably disposed at the bottom of the ascending/descending frame 50, and the first end portion 410 and the second end portion 411 are disposed at the upper and lower ends of the connection mechanism 42, respectively.

As shown in fig. 3, in some embodiments, the connection mechanism 42 includes: a connecting seat 420, a tensioning shaft 421 and an elastic member 423.

The connecting socket 420 is connected to one of the first end portion 410 and the second end portion 411, the tension shaft 421 is slidably provided on the connecting socket 420, and the tension shaft 421 is connected to the other of the first end portion 410 and the second end portion 411. An elastic member 423 is provided between the coupling seat 420 and the tension shaft 421 to allow the tension shaft 421 to tension the flexure body 41. For example, the upper end of the connecting seat 420 is connected to the first end 410, the tensioning shaft 421 is connected to the second end 411, the elastic member 423 enables the tensioning shaft 421 to have a tendency of moving upward, the second end 411 is close to the first end 410 under the driving of the tensioning shaft 421, the flexible member body 41 is in a tightened state, an error of movement of the ascending/descending frame 50 caused by loosening of the flexible member 40 is avoided, and accuracy is improved.

In some embodiments, as shown in fig. 3, the elastic member 423 is a spring, the spring is in a compressed state, the spring is sleeved on the tensioning shaft 421, and the top of the tensioning shaft 421 abuts against the top of the spring by providing a limit boss, so that the tensioning shaft 421 has a tendency of moving upward, and is simple and easy to obtain.

As shown in fig. 2, 5 and 6, in some embodiments, the lifting device 100 further includes a tensioning mechanism 80 disposed between the driven wheel 30 and the lower crane 10, and the tensioning mechanism 80 includes: a fixing seat 81, a fastening member (not shown).

The driven wheel 30 is arranged on the fixed seat 81, the fixed seat 81 is provided with a vertical sliding groove 810, the lower lifting frame 10 is provided with a limiting block 11 arranged in the vertical sliding groove 810, the vertical sliding groove 810 is matched on the limiting block 11 so that the fixed seat 81 can move up and down to drive the driven wheel 30 to move up and down, the distance between the driven wheel 30 and the driving wheel is changed, and therefore the flexible part 40 sleeved on the driving wheel and the driven wheel 30 is actively tensioned and adjusted, and the operation is simple. The fastener is arranged on the fixing seat 81, one end of the fastener extends into the vertical sliding groove 810 and abuts against the limiting block 11, and the fastener is screwed downwards so that the fixing seat 81 moves upwards. It should be noted that, when the fixing seat 81 moves the flexible member 40 upwards, the tightening degree of the flexible member 40 can be controlled by controlling the screwing amount of the fastening member, and the tightening degree of the flexible member 40 can be controlled by controlling the distance between the driving wheel and the driven wheel 30, for example, when the length of the fastening member in the vertical sliding groove 810 increases, the fixing seat 81 moves upwards relative to the limiting block 11 to tighten the flexible member 40, which is flexible, simple and practical.

In some embodiments, the fasteners are screws, which are simple and readily available.

As shown in fig. 5 and 6, in some embodiments, the top of the lower lifting frame 10 is provided with a groove 14, the limiting block 11 is arranged in the groove 14, and the fixing seat 81 and the driven wheel 30 are arranged in the groove 14, so that the space on the lower lifting frame 10 can be fully utilized, the size of the lifting device 100 is reduced, the device is miniaturized, and the passing performance in a corridor is improved.

In some embodiments, the lower crane 10 comprises a base 12 and a side support plate 13 connected to the base 12, a driven wheel 30 is disposed at an upper end of the support plate 13, and a rotation axis of the driven wheel 30 and a rotation axis of the driving wheel are parallel to the side support plate 13.

As shown in fig. 1 and 2, in some embodiments, the lower crane 10 includes a base 12 and a side support plate 13 connected to the base 12, the flexible member 40 has a first side 43 and a second side 44 which are oppositely disposed, a receiving space is formed between the first side 43 and the second side 44, and the side support plate 13 is located in the receiving space, so that the occupied space of the lower crane 10 and the flexible member 40 can be reduced, the volume of the lifting device 100 can be reduced, the device can be miniaturized, and the passability in a corridor can be improved.

As shown in fig. 1, in some embodiments, the lifting device 100 further includes a guide mechanism 90 disposed between the lifting frame 50 and the side support plate 13, and the guide mechanism 90 includes: a guide rail 91, a slider 92.

The flexible member 40 has guide rails 91 on both sides in the longitudinal direction of the side support plate 13, and the connection stability between the ascending/descending frame 50 and the side support plate 13 can be improved by providing the guide rails 91 on both the left and right sides of the flexible member 40, taking the longitudinal direction of the side support plate 13 as an example of the up-down direction. Each guide rail 91 is provided with a slider 92, and the slider 92 is connected with the side support plate 13. The guide rail 91 and the slider 92 guide the movement, and the mechanism is large in load and compact.

As shown in fig. 1, in some embodiments, the upper lifting frame 50 includes a top base 51 and two side lifting plates 52 connected to the top base 51, the number of the side lifting plates 52 may be two, two side supporting plates 13 are provided on the base 12, the two side supporting plates 13 are respectively connected to the side lifting plates 52, the top base 51 and the two side lifting plates 52 form a gantry structure, and the two side supporting plates 13 and the base 12 also form a gantry structure, which can improve the stability of the lifting device 100.

In some embodiments, the driving wheel, the driven wheel 30, the flexible member 40 and the locking assembly 70 form a driving device, and the driving device is arranged between the side lifting plate 52 and the side supporting plate 13, so that the lifting stability of the lifting device 100 is improved.

In some embodiments, the flexible member 40 is any one of a drive chain, a drive rope, and a drive belt, and accordingly, the driving and driven wheels 30 are any one of a sprocket, a sheave, and a pulley. For example, when the flexible member 40 is a chain, the transmission is stable and reliable, and the chain has a large movement stroke, which avoids the problem that the trapezoidal screw occupies an effective stroke in the prior art, thereby avoiding the problem that the lifting device 100 cannot contact the ceiling when being lifted, and further avoiding the problems that the trapezoidal screw is unstable and has an excessively large diameter, thereby avoiding the problem that the lifting device 100 has an excessively large volume.

In some embodiments, the driving member 60 is a motor, and the motor is connected to the driving wheel through a speed reducer to provide power.

An embodiment of the lifting device 100 of the present invention is described below with reference to fig. 1 to 6.

A lifting device 100 comprising: the device comprises a lower lifting frame 10, a driving wheel, a driven wheel 30, a flexible piece 40, an upper lifting frame 50, a locking assembly 70, a tensioning mechanism 80 and a guide mechanism 90.

An upper lifting frame 50 and a side supporting plate 13 are combined into a column, the lifting device 100 has two columns in total, and the side supporting plates 13 of the two columns are both arranged on the base 12 through screws. The side support plates 13 are provided with two guide rails 91, the sliders 92 of the guide rails 91 are connected to the ascending and descending frame 50, and the sliders 92 are slidable on the guide rails 91, so that the ascending and descending frame 50 is slidable along the guide rails 91 and guided by the guide rails 91, and the ascending and descending of the ascending and descending frame 50 is pulled by the flexible members 40, i.e., chains, which are flexible members 40. The chain is engaged with the driving wheel and the driven wheel 30, the driven wheel 30 is installed on the tensioning mechanism 80 positioned at the top of the side supporting plate 13, the driving wheel is installed on the output shaft of the driving part 60 positioned below the side supporting plate 13, namely the driving wheel is installed on the output shaft of the speed reducer. The connecting mechanism 42 is installed on the upper lifting frame 50, two ends of the chain are respectively connected with the tensioning shaft 421 and the connecting seat 420 of the connecting mechanism 42, the elastic piece 423 is sleeved on the tensioning shaft 421, the elastic piece 423 is a spring, the spring is in a compressed state initially, and if the chain is loosened, the spring can relax and rebound so as to tension the chain. The driven wheel 30 is mounted on the tensioning mechanism 80, a through hole is formed in each of the front shoulder and the rear shoulder of the tensioning mechanism 80, a fastener penetrates through the through hole and pushes the through hole to the fixed seat 81, the through hole is a threaded through hole, the fastener is a screw, if the chain is loosened or tightened, the tensioning mechanism 80 can be lifted or lowered by rotating the screw, the height of the driven wheel 30 on the tensioning mechanism 80 can be changed accordingly, the distance between the driving wheel and the driven wheel 30 is changed, the chain is loosened or tightened, the adjusting method is coarse adjustment, and manual adjustment is adopted.

The ascending and descending frame 50 is driven by the driving wheel driven by the driving element 60 to rotate, and the ascending and descending frame 50 can slide along the guide rail 91 on the side supporting plate 13 through chain transmission. The lifting of the lifting frame 50 along the side supporting plate 13 is the expansion of the upright column, the upright column can expand to different heights, and the height of the expanded upright column is fixed by the locking assembly 70. The outside of the ascending and descending frame 50 is provided with a locked piece 71, the locked piece 71 is a rack, the top of the side supporting plate 13 is provided with a locking piece 72, the locking piece 72 is a pawl, the swinging piece 731 is connected with the pawl through a hinge pin 74, the swinging piece 731 is a rocker, the hinge pin 74 can rotate, the rocker drives the pawl to rotate, a connecting rope is connected between the unlocking driving piece 730 and the rocker, the rope is normally loosened, and if the connecting rope is pulled to pull the rocker downwards, the connecting rope can drive the hinge pin 74 and the pawl on the hinge pin 74 to rotate. The pawl is stopped against the gullet portion 710 of the rack by the torsion spring, the rack can only move in one direction (upward) relative to the pawl, and cannot move downward, because the pawl catches the tooth portion 711 of the rack if the rack moves downward, so that the lifting frame 50 cannot be lifted without pulling the pawl. When the column is extended, the ascending/descending frame 50 slides upward, the rack ascends together with the ascending/descending frame 50, and when the column is raised to a target height, the pawl catches the rack part 710, and the ascending/descending frame 50 is fixed. When the column is to be retracted, the pawl needs to be pulled away from the riser 50 to enable downward movement. Before pulling the pawl open, the ascending and descending frame 50 needs to slightly ascend, the connecting rope is tensioned through the unlocking driving piece 730 when the tooth part 711 of the rack does not block the pawl, the rocker is pulled by the connecting rope, the pawl installed on the hinge pin 74 is pulled to rotate by a certain angle, the rack is not blocked by the pawl, the ascending and descending frame 50 can slide downwards, and the upright post can be retracted.

A plastering apparatus (not shown) according to an embodiment of the present invention comprises: lifting device 100, plastering device (not shown).

The lifting device 100 is the lifting device 100 described above. The plastering apparatus is provided on the ascending and descending frame 50.

According to the plastering device of the embodiment of the invention, the driving wheel is driven to rotate by the driving piece 60 of the lifting device 100, so that the flexible piece 40 is driven to move, and finally the upper lifting frame 50 can be lifted on the lower lifting frame 10. The invention can limit the ascending and descending of the ascending and descending frame 50 on the lower ascending and descending frame 10 through the locking assembly 70, control the ascending and descending frame 50 to be positioned at the preset position on the lower ascending and descending frame 10, has convenient operation and improves the flexibility of the lifting device 100.

The lifting device 100 and the operation thereof according to embodiments of the present invention are well known to those of ordinary skill in the art and will not be described in detail herein.

In the description herein, references to the description of the terms "embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A lifting device, comprising:

a lower lifting frame;

the lifting frame is slidably arranged on the lower lifting frame;

the driving assembly can drive the ascending and descending frame to do ascending and descending motion relative to the descending frame;

the locking assembly comprises a locked piece, a locking piece and an unlocking piece, the locked piece is arranged on the upper lifting frame, and the locking piece and the unlocking piece are arranged on the lower lifting frame; when the ascending and descending frame is static relative to the descending frame, the locked piece is locked by the locking piece; when the ascending and descending frame ascends and descends relative to the descending frame, the unlocking piece drives the locking piece to unlock the locked piece.

2. The lifting device as claimed in claim 1, wherein the unlocking member drives the locking member to unlock the locked member only when the ascending descending frame moves downward relative to the descending frame; when the ascending and descending frame moves upwards relative to the descending frame, the locking piece releases the locking of the locked piece.

3. The lifting device as claimed in claim 1, wherein the locked member is a rack, and the locking member is a pawl swingable up and down within a predetermined range; wherein the content of the first and second substances,

when the lifting frame is upwards static relative to the lower lifting frame, the pawl is stopped against the tooth socket part of the rack; when the lifting frame moves upwards relative to the lower lifting frame, the plurality of tooth parts on the rack alternately drive the pawl to swing upwards; when the ascending and descending frame moves downwards, the unlocking piece drives the pawl to swing upwards to be separated from the tooth groove part.

4. The lift device of claim 3, wherein the unlocking member comprises:

an unlocking drive having an output with a first position and a second position;

the swinging piece is connected with the rotating shaft of the pawl;

connect the rope, it connects to connect rope one end swing piece and other end are connected the output, the output by first position motion extremely during the second position the output orders about the locking piece removes the locking by the latch fitting.

5. The lift device of claim 1, wherein the drive assembly comprises:

the driving wheel is arranged at the lower part of the lower lifting frame;

the driven wheel is arranged at the upper part of the lower lifting frame;

the flexible piece is sleeved on the driving wheel and the driven wheel; and

the driving piece is connected with the driving wheel so as to drive the ascending and descending frame to ascend and descend relative to the descending frame.

6. The lift device of claim 5, wherein the flexure comprises:

a flexure body having a first end and a second end;

the connecting mechanism is detachably arranged at the bottom of the ascending and descending frame, and the first end part and the second end part are respectively arranged at the upper end and the lower end of the connecting mechanism.

7. The lift mechanism of claim 6, wherein the connection mechanism comprises:

a connection seat connected on one of the first end and the second end;

a tensioning shaft slidably disposed on the connecting seat, the tensioning shaft connected to the other of the first end and the second end;

and the elastic piece is arranged between the connecting seat and the tensioning shaft so as to enable the tensioning shaft to tension the flexible piece main body.

8. The lift mechanism of claim 5, further comprising a tensioning mechanism disposed between the driven wheel and the lower lift, the tensioning mechanism comprising:

the driven wheel is arranged on the fixed seat, the fixed seat is provided with a vertical sliding groove, and the lower lifting frame is provided with a limiting block arranged in the vertical sliding groove;

the fastener is arranged on the fixing seat, one end of the fastener extends into the vertical sliding groove and is abutted to the limiting block, and the fastener is screwed downwards so that the fixing seat moves upwards.

9. The lifting device as claimed in claim 8, wherein the lower lifting frame has a recess at the top thereof, the stopper is disposed in the recess, and the fixing base and the driven wheel are disposed in the recess.

10. The lifting device as claimed in claim 5, wherein the lower lifting frame comprises a base and a side supporting plate connected with the base, the driven wheel is arranged at the upper end of the side supporting plate, and the rotation axis of the driven wheel and the rotation axis of the driving wheel are parallel to the side supporting plate.

11. The lift device of claim 10, further comprising a guide mechanism disposed between the lifting frame and the side support plate, the guide mechanism comprising:

the guide rails are arranged on two sides of the flexible part in the length direction of the side supporting plate;

the slide block is arranged on each guide rail and connected with the side supporting plate.

12. A plastering apparatus, comprising:

a lifting device according to any one of claims 1 to 11;

and the plastering device is arranged on the lifting frame.