CN104074342A - Overload protection device - Google Patents
Overload protection device Download PDFInfo
- Publication number
- CN104074342A CN104074342A CN201410344764.2A CN201410344764A CN104074342A CN 104074342 A CN104074342 A CN 104074342A CN 201410344764 A CN201410344764 A CN 201410344764A CN 104074342 A CN104074342 A CN 104074342A
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- CN
- China
- Prior art keywords
- limit switch
- hoist engine
- plastering machine
- overload protection
- pulley yoke
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention discloses an overload protection device which comprises a winch, a wall plastering machine and a pulley yoke, wherein the winch drives the wall plastering machine through a steel wire rope; the pulley yoke is capable of swinging relative to a rack where the winch is located; a pulley for changing the tension direction of the steel wire rope is mounted on the pulley yoke; a first touch surface and a second touch surface are further arranged on the pulley yoke; a thrust device is arranged in the position opposite to the first touch surface; a tension device is connected onto the second touch surface; the overload protection device further comprises a first limit switch and a second limit switch which can control the winch to stop operating; and the first limit switch is mounted on the side of the first touch surface, and the second limit switch is mounted on the side of the second touch surface. The overload protection device disclosed by the invention is simple in structure and can be started in time to stop winch operation under the jamming condition in the ascending or descending process of the wall plastering machine, and accordingly, the machine is effectively protected.
Description
Technical field
The present invention relates to the overload protection arrangement of plastering machine, especially a kind of overload protection arrangement.
Background technology
Plastering machine substitutes manually to spreading cement mortar on body of wall has the advantages such as efficiency is high, time saving and energy saving less manpower.
At present, plastering machine that construction is used is provided with one group of upright track, and one group of such upright track track normally parallel to each other by 2 and vertical setting forms, and is called left track and right track.The head of plastering a wall is done elevating movement along upright track, thereby realizes plastering and top-down calendering function from bottom to top.
In existing plastering machine, as plastering machine is first, by wire rope, be connected with hoist engine, realize the head of plastering a wall and along upright track, make the function of elevating movement.If notice of authorization number is disclosed a kind of plastering machine in the patent document of CN2531027Y, it is comprised of track, hoist engine, plastering machine three parts, and track is comprised of upper and lower traverse rod and vertical rail; Hoist engine is connected with plastering machine by wire rope; Defeated mud band is housed on plastering machine fuselage, deposits mud plate, mud throwing, trowel.This plastering machine is used while being suitable for plastering a wall surface construction, can improve work efficiency, reduce labor intensity.
If the surface of wall out-of-flatness that powder is smeared, plastering machine is in lifting process, and patter may be touched the projection on body of wall and cannot follow plastering machine and continue to do elevating movement.Now, if plastering machine still keeps rising or declines, the load meeting of plastering machine increases fast, may meet with because patter scrapes projection by force and damage the situation that body of wall or patter fracture.For fear of occurring above-mentioned two situations, load protector is generally also installed on plastering machine.This load protector is comprised of current sensing means and power cutoff mechanism.When there is any of above-mentioned two situations, the load of plastering machine all can increase fast, and now, the electric current of plastering machine also can increase.When the electric current that plastering machine detected when current sensing means surpasses setting value, power cutoff mechanism will start, cut off the power supply of plastering machine, the head that makes to plaster a wall forfeiture power, thus protect patter and body of wall.
Yet the operating current that plastering machine detected from current sensing means exceeds setting value, to power cutoff mechanism, cut off the power supply of plastering machine, this process need regular hour, cannot respond in time.During this section, the head of plastering a wall still can keep rising or declining, and patter still can be squeezed and be fractureed.And this load protector only can detect the situation that in patter uphill process, plastering machine load increases, the situation that in patter decline process, plastering machine load increases cannot detect.
For this reason, need a kind of new load protector.
Summary of the invention
The object of the present invention is to provide a kind of when patter meets with obstruction in process of rising or falling, thereby can respond in time protection machine overload protection arrangement.
To achieve these goals, the present invention adopts following technical scheme:
An overload protection arrangement, comprises hoist engine and plastering machine, and hoist engine carries out transmission by wire rope to plastering machine; Also comprise a swingable pulley yoke of relative hoist engine place frame; On described pulley yoke, be provided with for changing the pulley of described lineoutofservice signal pull direction; On pulley yoke, be also provided with the first touching face and the second touching face; The contraposition of the first touching face institute has installed thrust device; On the second touching face, be connected with puller system; Also comprise and can control the first limit switch and the second limit switch that hoist engine shuts down; The first limit switch is placed in the first touching face one side, and the second limit switch is placed in the second touching face one side.
Operating principle of the present invention is as follows:
1) plaster a wall head when being parked in the end and hoist engine and not starting: under the effect of puller system, pulley yoke is parked in the position of depressing the second limit switch.
2) in normal rope traction plastering machine uphill process: the pulling force that is changed the wire rope of direction can produce a metastable lateral thrust to pulley yoke, this lateral thrust is towards the first limit switch, and is greater than the pulling force of puller system.Due to lateral thrust and puller system pulling force can not overcome the tripping force of thrust device with joint efforts, so pulley yoke will be pressed on thrust device, be between the first limit switch and the second limit switch, but can not deflect to the position that presses the first limit switch.
3) while running into card machine in rope traction plastering machine uphill process: as the projection on body of wall causes machine stuck, plastering machine cannot continue to rise.Now, the pulling force of wire rope can increase moment, and described lateral thrust also can increase thereupon.When lateral thrust overcomes the pulling force of puller system and the tripping force of thrust device; pulley yoke will deflect and press the first limit switch; now the first limit switch will directly cut off the power supply of hoist engine; or the signal that output makes hoist engine stop operating as signal generation apparatus; force hoist engine to quit work, thereby realize the object of protection hoist engine and the head of plastering a wall.
4) in normal rope traction plastering machine decline process: the pulling force that is changed the wire rope of direction can produce a metastable lateral thrust to pulley yoke equally, this lateral thrust is towards the first limit switch, and is greater than the pulling force of puller system.Due to lateral thrust and puller system pulling force can not overcome the tripping force of thrust device with joint efforts, so pulley yoke will be pressed on thrust device, be between the first limit switch and the second limit switch, but can not deflect to the position that presses the first limit switch.
5) while running into card machine in rope traction plastering machine decline process: when plastering machine cannot continue to decline, now, because hoist engine still keeps running, it is lax that wire rope will become, and lateral thrust before this will disappear.Pulley yoke will deflect and press the second limit switch to puller system direction under the effect of puller system.Now the second limit switch will directly cut off the power supply of hoist engine, or the signal that output makes hoist engine stop operating as signal generation apparatus, forces hoist engine to quit work, thereby realizes the object of protection hoist engine and the head of plastering a wall.
It should be noted that hoist engine is rotating type, it is provided with the contactor of two interlockings, the rotating correspondence of hoist engine plaster a wall vertical motion and the down maneuver of head.The first limit switch is for controlling stopping of the head vertical motion of plastering a wall, and the second limit switch is for controlling stopping of the head down maneuver of plastering a wall.
In addition, the head of plastering a wall declines again after being raised to top, hoist engine can need to experience a stopped process during this time, but this stopped process wire rope is the weight of still bearing the head of plastering a wall, so in this stopped process, pulley yoke is to keep being between the first limit switch and the second limit switch, and can not press the first limit switch or the second limit switch.
As known from the above, the tripping force of thrust device has determined the startup opportunity of overload protection function.And once after starting, the thrust of thrust device is a constant force preferably, but not the device that the thrust of cylinder, common spring one class can change with deformation state.Preferred scheme is, thrust device is air spring or other is for providing the mechanism of constant force.
While running into card machine situation due to plastering machine, the patter on plastering machine can bear larger load.Can overload protection arrangement start in time can determine that can machine intact.For this reason, preferably, the first limit switch and the second limit switch are microswitch type travel switches.
When plastering machine runs into card machine situation in decline process, can puller system pull pulley yoke to move and determined that can machine intact toward the second limit switch in time.For this reason, preferably, puller system is selected extension spring.
Overload protection arrangement disclosed by the invention, simple in structure, no matter plastering machine runs into card machine situation in process of rising or falling, can start in time, hoist engine is shut down, thereby effectively protect machine.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of plastering machine structure in the embodiment of the present invention 1;
Fig. 2 is the partial enlarged drawing of A in Fig. 1;
Fig. 3 is plastering machine structural representation when hoist engine does not start in the embodiment of the present invention 1;
Fig. 4 is the partial enlarged drawing of A in Fig. 3;
Fig. 5 is schematic diagram during the first stroke switch in the embodiment of the present invention 1;
Fig. 6 is schematic diagram when the second travel switch is worked in the embodiment of the present invention 1;
Fig. 7 is the schematic diagram of plastering machine mechanism in the embodiment of the present invention 2;
Fig. 8 is the schematic diagram of overload protection arrangement in the embodiment of the present invention 2.
Description of reference numerals: 1-hoist engine; 2-plastering machine; 3-wire rope; 4-pulley yoke; 5-pulley; 6-the first touching face; 7-the second touching face; 8-air spring; 9-the first travel switch; 10-the second travel switch; 11-extension spring; 12-gripper shoe; 13-bearing pin; 14-hoist engine frame
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
Embodiment 1:
Overload protection arrangement as shown in Figure 1, 2, comprises hoist engine 1 and plastering machine 2.Hoist engine 1 carries out transmission by 3 pairs of plastering machines of wire rope 2.Overload protection arrangement is arranged in hoist engine frame 14.Hoist engine 1 is rotating type, and it is provided with the contactor of two interlockings.Vertical motion and the down maneuver of the corresponding plastering machine 2 of rotating of hoist engine 1.
Pulley yoke 4 is hinged in hoist engine frame 14 by bearing pin 13, and hoist engine frame 14 swings relatively.
Pulley yoke 4 is provided with the first touching face 6 and the second touching face 7.One side of the first touching face 6 is provided with air spring 8 and the first travel switch 9; A side that is connected with extension spring 11, the second touching faces 7 on the second touching face 7 is also provided with the second travel switch 10.Air spring 8 and extension spring 11 are installed in hoist engine frame 14, and the first travel switch 9 and the second travel switch 10 electrically connect with hoist engine 1.The first travel switch 9 is for controlling stopping of plastering machine 2 vertical motions, and the second travel switch 10 is for controlling stopping of plastering machine 2 down maneuvers.In the present embodiment 1, the first travel switch 9 and the second travel switch 10 are all microswitch type travel switches.
Pulley 5 is also installed on pulley yoke 4.Pulley 5 is pressed on wire rope 3 by extension spring 11.Now, the pulling force of wire rope 3 can cause a metastable lateral force to pulley 5.
As shown in Figure 3,4, when plastering machine 2 is parked in the end and hoist engine 1 and does not start, under the effect of extension spring 11, pulley yoke 4 is pressed on the second travel switch 10.
For uphill process:
In normal work, wire rope 3 traction plastering machines 2 rise, and the pulling force that is changed the wire rope 3 of direction can produce a metastable lateral thrust to pulley 5, and this lateral thrust is equal to or greater than the pulling force of extension spring 11.Lateral thrust at wire rope 3 equals in the pulling force situation of extension spring 11, and pulley yoke 4 keeps motionless, and the relative position of pulley 5 and wire rope 3 is constant; Lateral thrust at wire rope 3 is greater than in the pulling force situation of extension spring 11, pulley yoke 4 has to the trend of air spring 8 direction deflections, but now, the difference of the pulling force of the lateral thrust that wire rope 3 produces and extension spring 11 is still less than the tripping force of air spring 8, pulley yoke 4 can not deflect to the position that presses the first travel switch 9, and plastering machine 2 keeps normal and rises.
When occurring unexpected situation, as the projection on body of wall causes machine stuck, plastering machine 2 cannot continue to rise, and now, as shown in Figure 5, the pulling force of wire rope 3 can increase moment, and its lateral force also can increase thereupon.When lateral force is greater than the tripping force sum of pulling force that extension spring 11 provides and air spring 8, pulley yoke 4 is communicated with pulleys 5 and deflects and press the first travel switch 9, and hoist engine 1 is shut down, thereby realizes the object of protection hoist engine and the head of plastering a wall.
For decline process:
In normal work, wire rope 3 traction plastering machines 2 decline, and the pulling force that is changed the wire rope 3 of direction can produce a metastable lateral thrust to pulley 5 equally, and this lateral thrust is equal to or greater than the pulling force of extension spring 11 equally.Lateral thrust at wire rope 3 equals in the pulling force situation of extension spring 11, and pulley yoke 4 keeps motionless, and the relative position of pulley 5 and wire rope 3 is constant; Lateral thrust at wire rope 3 is greater than in the pulling force situation of extension spring 11, pulley yoke 4 has to the trend of air spring 8 direction deflections, but now, the difference of the pulling force of the lateral thrust that wire rope 3 produces and extension spring 11 is still less than the tripping force of air spring 8, pulley yoke 4 can not deflect to the position that presses the first travel switch 9, and plastering machine 2 keeps normal and rises.
And the projection of working as on body of wall causes machine stuck, when plastering machine 2 cannot continue to decline, now, as shown in Figure 6, because hoist engine 1 still keeps running, wire rope 3 will become to relax the lateral thrust of 3 pairs of pulley yokes 4 of wire rope is disappeared, wire rope 3 and pulley 5 disengagings.Pulley yoke 4 is communicated with pulley 5 and can under the effect of extension spring 11, the direction toward extension spring 11 deflects and press the second travel switch 10; now the second travel switch 10 will directly cut off the power supply of hoist engine 1; or the signal that output makes hoist engine 1 stop operating as signal generation apparatus; force hoist engine 1 to quit work, thereby realize the object of protection hoist engine and the head of plastering a wall.
In actual use, plastering machine can constantly repeat to rise to the action declining again behind top, hoist engine can need to experience a stopped process during this time, but this stopped process wire rope is the weight of still bearing plastering machine, so in this stopped process, pulley yoke is to keep being between the first limit switch and the second limit switch, and can not press the first travel switch or the second travel switch.
Embodiment 2:
Identical with embodiment 1 of the structure of the overload protection arrangement of the present embodiment 2, the present embodiment 2 is with the difference of embodiment 1, and as shown in Figure 7,8, hoist engine 1 is directly fixedly connected with plastering machine 2, and wire rope is relative with portal frame top fixing.Now, overload protection arrangement is directly installed on plastering machine 2.
Extension supporting plate 12 in the frame of plastering machine 2, extension spring 11 is connected in gripper shoe 12.Pulley yoke 4 is hinged on by bearing pin 13 in the frame of plastering machine 2, and plastering machine 2 swings relatively.
Along with rising or the decline of plastering machine 2, overload protection arrangement is all followed plastering machine 2 motions, and the relative position of pulley 5 and wire rope 3 remains unchanged.When occurring unexpected situation, as the projection on body of wall causes machine stuck, plastering machine 2 cannot continue to rise or decline, now, overload protection arrangement action, its course of action is consistent with embodiment 1, and hoist engine 1 shuts down, and realizes the function of protection machine.
Overload protection arrangement disclosed by the invention, simple in structure, no matter plastering machine runs into card machine situation in process of rising or falling, can start in time, hoist engine is shut down, thereby effectively protect machine.
Above-listed detailed description is for the illustrating of the feasible embodiment of the present invention, and this embodiment is not in order to limit the scope of the claims of the present invention, and the equivalence that every the present invention of disengaging has done is implemented or change, all should be included within the scope of patent right of the present invention.
Claims (4)
1. an overload protection arrangement, comprises hoist engine and plastering machine, and hoist engine carries out transmission by wire rope to plastering machine, it is characterized in that: also comprise a swingable pulley yoke of relative hoist engine place frame; On described pulley yoke, be provided with for changing the pulley of described lineoutofservice signal pull direction; On described pulley yoke, be also provided with the first touching face and the second touching face; The contraposition of the first touching face institute has installed thrust device; On the second touching face, be connected with puller system; Also comprise and can control the first limit switch and the second limit switch that hoist engine shuts down; Described the first limit switch is placed in the first touching face one side, and described the second limit switch is placed in the second touching face one side.
2. a kind of overload protection arrangement according to claim 1, is characterized in that: described thrust device is air spring or other is for providing the mechanism of constant force.
3. a kind of overload protection arrangement according to claim 1, is characterized in that: described the first limit switch and the second limit switch are microswitch type travel switches.
4. a kind of overload protection arrangement according to claim 1, is characterized in that: described puller system is extension spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410344764.2A CN104074342B (en) | 2014-07-18 | 2014-07-18 | A kind of overload protection arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410344764.2A CN104074342B (en) | 2014-07-18 | 2014-07-18 | A kind of overload protection arrangement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104074342A true CN104074342A (en) | 2014-10-01 |
| CN104074342B CN104074342B (en) | 2016-06-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410344764.2A Expired - Fee Related CN104074342B (en) | 2014-07-18 | 2014-07-18 | A kind of overload protection arrangement |
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| Country | Link |
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| CN (1) | CN104074342B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5368429A (en) * | 1991-04-29 | 1994-11-29 | Young; Roland O. | Panel lifting apparatus |
| CN2506728Y (en) * | 2001-10-18 | 2002-08-21 | 商其山 | Automatic plastering machine |
| CN200949309Y (en) * | 2006-09-19 | 2007-09-19 | 杨云山 | Wall plastering machine base device |
| CN202214965U (en) * | 2011-07-18 | 2012-05-09 | 黄仕安 | Complete electric mechanical whitewashing equipment |
| CN203640243U (en) * | 2013-12-16 | 2014-06-11 | 邱忠 | Automatic wall whitewashing and flattening machine |
| CN204040418U (en) * | 2014-07-18 | 2014-12-24 | 王建虎 | A kind of overload protection arrangement |
-
2014
- 2014-07-18 CN CN201410344764.2A patent/CN104074342B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5368429A (en) * | 1991-04-29 | 1994-11-29 | Young; Roland O. | Panel lifting apparatus |
| CN2506728Y (en) * | 2001-10-18 | 2002-08-21 | 商其山 | Automatic plastering machine |
| CN200949309Y (en) * | 2006-09-19 | 2007-09-19 | 杨云山 | Wall plastering machine base device |
| CN202214965U (en) * | 2011-07-18 | 2012-05-09 | 黄仕安 | Complete electric mechanical whitewashing equipment |
| CN203640243U (en) * | 2013-12-16 | 2014-06-11 | 邱忠 | Automatic wall whitewashing and flattening machine |
| CN204040418U (en) * | 2014-07-18 | 2014-12-24 | 王建虎 | A kind of overload protection arrangement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104074342B (en) | 2016-06-01 |
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Effective date of registration: 20151120 Address after: 528200, Shengli South Road, Nanhai Industrial Zone, Nanhai District, Guangdong, Foshan Applicant after: FOSHAN TUPO MACHINERY MANUFACTURING CO., LTD. Address before: 528200 breakthrough machinery company, Shengli South Road, Ping Industrial Park, Nanhai District, Foshan, Guangdong 1, China Applicant before: Wang Jianhu |
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Granted publication date: 20160601 Termination date: 20190718 |