CN211419419U - Pulley meets and hinders protection device - Google Patents
Pulley meets and hinders protection device Download PDFInfo
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- CN211419419U CN211419419U CN201921886799.3U CN201921886799U CN211419419U CN 211419419 U CN211419419 U CN 211419419U CN 201921886799 U CN201921886799 U CN 201921886799U CN 211419419 U CN211419419 U CN 211419419U
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- pulley
- protection device
- switch
- torsional spring
- pulley shaft
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Abstract
The utility model relates to a pulley mechanism technical field discloses a pulley meets and hinders protection device, including installing support, pulley, loose pulley axle, switch and torsional spring, pulley mounting is on the loose pulley axle, and the loose pulley axle can set up on the installing support with reciprocating, and the torsional spring butt is between installing support and loose pulley axle, and the torsional spring has the elastic force that makes the loose pulley axle reset upwards to make the loose pulley axle produce triggering signal with switch looks butt when upwards resetting. The pulley is when receiving normal decurrent pulling force for the pulley axial is pushed down, can not take place looks butt with the switch, and the pulley can normal use. When the pulley is blocked, downward tension disappears, the torsion spring drives the pulley to reset in the axial direction by the elastic force when the torsion spring is restored to the free state, and a trigger signal is generated by the torsion spring and the switch in a butting way, so that the pulley stops rotating continuously, the pulley mechanism is protected, and certain safety guarantee is also provided for users.
Description
Technical Field
The utility model relates to a pulley mechanism technical field especially relates to a pulley meets and hinders protection device.
Background
The electric clothes hanger needs to drive the airing rod assembly to ascend or descend by a certain height through the pulley mechanism in the using process, but in the using process, the phenomenon of hindered descending often occurs, generally, people or objects touch the airing rod assembly, so that the airing rod assembly cannot descend continuously, the transmission part inside the electric clothes hanger is easily damaged, the service life of the clothes hanger is shortened, and the user is easily injured.
At present, pulley mechanisms of clothes drying machines on the market basically have a resistance protection function, namely, when the clothes drying machines rise or fall, the clothes drying machines break power when encountering obstacles, so that the functions of protecting users and preventing a motor from jumping wires are achieved. The core part of the resistance-encountering protection function is a resistance-encountering switch which has an electronic type and a mechanical type, and some mechanical resistance-encountering devices have more complex structures and generally higher production cost.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: how to realize the resistance-encountering protection function of the pulley mechanism through a simpler and more compact structural design.
In order to solve the technical problem, the utility model provides a pulley meets and hinders protection device, including installing support, pulley shaft, switch and torsional spring, the switch install in on the installing support, the pulley install in on the pulley shaft, the pulley shaft can set up with reciprocating on the installing support, the torsional spring butt in the installing support with between the pulley shaft, the torsional spring has the messenger the elastic force that the pulley shaft upwards resets, so that the pulley shaft when upwards resetting with switch looks butt produces triggering signal.
Preferably, the mounting bracket is provided with two fixing plates which are arranged oppositely, the fixing plates are provided with waist-shaped holes with lengths arranged along the vertical direction, the pulley shafts are mounted on the two waist-shaped holes, and the pulleys are located between the two fixing plates.
Preferably, the two ends of the pulley shaft are provided with sliding blocks, the two ends of the pulley shaft are provided with annular clamping grooves, and the sliding blocks are fixed on the fixing plate through elastic check rings by the annular clamping grooves.
Preferably, a first boss abutting against the kidney-shaped hole is arranged on one side of the sliding block, and a second boss abutting against the torsion spring is arranged on the other side of the sliding block.
Preferably, the first boss is rectangular, and the second boss is cylindrical.
Preferably, the pulley shaft is provided with an anti-rotation plane which is abutted to the sliding block.
As the preferred scheme, still including being used for the installation the mounting panel of torsional spring, the mounting panel is equipped with and is used for fixing the lug of the spring body of torsional spring, the first connecting rod of torsional spring with mounting panel fixed connection, the second connecting rod of torsional spring is located on the slider.
Preferably, the fixing plate is disposed at a front side of the mounting bracket, the mounting plate is disposed at a back side of the mounting bracket, and the second link abuts against the slider through a through hole.
Preferably, the sliding block is provided with a pressure lever, and when the pulley shaft is reset upwards, the pressure lever is abutted against a shifting sheet of the switch to generate a trigger signal.
Preferably, the switch is a microswitch.
The embodiment of the utility model provides a pulley meets and hinders protection device compares with prior art, and its beneficial effect lies in:
the embodiment of the utility model provides a pulley is when receiving normal decurrent pulling force, through the pulley shaft is confronted the elasticity of torsional spring makes the pulley shaft pushes down, can not with switching on and shutting down takes place looks butt, the pulley can normal use. When the pulley mechanism is blocked, downward pulling force disappears, the torsion spring drives the pulley to reset in the axial direction by the elastic force when the torsion spring is restored to the free state, and the torsion spring is abutted against the switch to generate a trigger signal, so that the pulley stops rotating continuously, the pulley mechanism is protected, certain safety guarantee is also provided for a user, the torsion spring is utilized to realize the blocking protection function of the pulley mechanism, and the pulley mechanism has the advantages of compact structure, stability, reliability and the like.
Drawings
Fig. 1 is a schematic perspective view of a pulley obstacle protector according to a preferred embodiment of the present invention.
Fig. 2 is another schematic perspective view of the pulley block protector according to the preferred embodiment of the present invention.
Fig. 3 is a schematic structural view of a mounting bracket in the pulley encounter protection device according to the preferred embodiment of the present invention.
Fig. 4 is a schematic structural view of a pulley shaft in the pulley encounter protection device according to the preferred embodiment of the present invention.
Fig. 5 is a schematic structural view of a slider in the pulley encounter protection device according to the preferred embodiment of the present invention.
Fig. 6 is a schematic structural view of a switch in the pulley encounter protection device according to the preferred embodiment of the present invention.
In the figure: 10. mounting a bracket; 11. a fixing plate; 12. a kidney-shaped hole; 20. a pulley; 30. a pulley shaft; 31. an annular neck; 32. an anti-rotation plane; 40. a switch; 41. a shifting sheet; 50. a torsion spring; 60. a slider; 61. a first boss; 62. a second boss; 63. a pressure lever; 70. a circlip; 80. mounting a plate; 81. and (4) a bump.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the terms "connected," "connected," and "fixed" used in the present invention should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral body; the connection can be mechanical connection or welding connection; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
As shown in fig. 1 to 6, the preferred embodiment of the present invention provides a pulley resistance-encountering protection device, including a mounting bracket 10, a pulley 20, a pulley shaft 30, a switch 40 and a torsion spring 50, wherein the switch 40 is mounted on the mounting bracket 10, the pulley 20 is mounted on the pulley shaft 30, the pulley shaft 30 is movably disposed on the mounting bracket 10, the torsion spring 50 abuts against the mounting bracket 10 and between the pulley shafts 30, and the torsion spring 50 has an elastic force for restoring the pulley shaft 30 upward, so that the pulley shaft 30 abuts against the switch 40 to generate a trigger signal when restoring upward.
Based on the pulley resistance-encountering protection device with the technical characteristics, when the pulley 20 is under normal downward tension, the pulley shaft 30 resists the elasticity of the torsion spring 50, so that the pulley shaft 30 is pressed downward and cannot abut against the switch 40, and the pulley 20 can be normally used. When the downward pulling force disappears when the pulley is blocked, the elasticity of the torsion spring 50 when the pulley is restored to the free state drives the pulley shaft 30 to reset upwards and generate a trigger signal in contact with the switch 40, so that the pulley 20 stops rotating continuously, the pulley mechanism is protected, certain safety guarantee is provided for users, the torsion spring 50 is used for realizing the resistance protection function of the pulley mechanism, and the pulley mechanism has the advantages of compact structure, stability, reliability and the like.
As shown in fig. 3, in this embodiment, the mounting bracket 10 is provided with two fixing plates 11 disposed oppositely, the fixing plates 11 are provided with waist-shaped holes 12 whose lengths are set along the vertical direction, the pulley shaft 30 is mounted on the two waist-shaped holes 12, the pulley 20 is located between the two fixing plates 11, two ends of the pulley shaft 30 are correspondingly mounted on the two fixing plates 11, and the fixing plates 11 limit the pulley 20, so that the pulley 20 rolls between the two fixing plates 11.
As shown in fig. 4 and 5, in this embodiment, two ends of the pulley shaft 30 are provided with sliding blocks 60, two ends of the pulley shaft 30 are provided with annular clamping grooves 31, the annular clamping grooves 31 fix the sliding blocks 60 on the fixing plate 11 through elastic retaining rings 70, specifically, the sliding blocks 60 pass through the sliding blocks 60 and are clamped into the annular clamping grooves 31 through the elastic retaining rings 70, so that the sliding blocks 60 are fixed on the outer side of the fixing plate 11.
In this embodiment, one side of the slider 60 is provided with a first boss 61 abutting against the kidney-shaped hole 12, the other side of the slider 60 is provided with a second boss 62 abutting against the torsion spring 50, wherein the first boss 61 is rectangular, the width of the first boss 61 is slightly smaller than the width of the kidney-shaped hole 12, the first boss 61 can move up and down along the kidney-shaped hole 12 to prevent the slider 60 from rotating, and the second boss 62 is cylindrical, and the outer wall of the second boss is used for abutting against the torsion spring 50.
Further, the pulley shaft 30 is provided with an anti-rotation plane 32 abutting against the slider 60, and after the pulley shaft 30 passes through the slider 60, the pulley shaft 30 is abutted against the slider 60 through the anti-rotation plane 32, so that the pulley shaft 30 can prevent free rotation relative to the fixed plate 11.
Combine fig. 2 to show, in this embodiment, still including being used for the installation the mounting panel 80 of torsional spring 50, mounting panel 80 is equipped with and is used for fixing the lug 81 of the spring body of torsional spring 50, torsional spring 50's first connecting rod with mounting panel 80 fixed connection, torsional spring 50's second connecting rod is located on the slider 60, through the lug 81 is right the spring body of torsional spring 50 plays the installation effect, guarantees the first connecting rod of torsional spring 50 with produce the elastic force under the relative movement's the condition takes place for the second connecting rod of torsional spring 50, and act on the slider 60, wherein, torsional spring 50 can be according to the standard component torsional spring 50 of corresponding model is selected for use to the pulling force size that pulley 20 bore, low in production cost and maintenance convenience.
Further, the fixing plate 11 is disposed at the front side of the mounting bracket 10, the mounting plate 80 is fixed at the back side of the mounting bracket 10 through a bolt, and the second connecting rod is abutted to the sliding block 60 through a through hole, so that the mounting space is saved, and the overall structure is more compact.
As shown in fig. 6, in this embodiment, the sliding block 60 is provided with a pressing rod 63, when the pulley shaft 30 is reset upward, the pressing rod 63 abuts against the toggle piece 41 of the switch 40 to generate a trigger signal, and the pressing rod 63 is located outside the second boss 62 to limit the torsion spring 50, so as to prevent the torsion spring 50 from separating from the second boss 62.
In this embodiment, the switch 40 is a micro switch, and the micro switch is mounted on the mounting bracket 10 through a bolt, and has the advantages of small contact distance, short action stroke, small pressing force, rapid on-off and the like.
In addition, when triggering the switch 40, the transmission signal is given to the controller, and the controller can control the driving mechanism to drive the pulley shaft 30 to rotate reversely and rise a certain distance or make the pulley shaft 30 or the pulley 20 stop rotating, start an alarm, etc., and the utility model discloses do not limit this.
The working principle of the chance-to-block protection device of the embodiment is as follows: the steel wire rope is hung on the pulley 20, and in a normal use state, the steel wire rope is subjected to downward tension to resist the elastic force of the torsion spring 50, so that the pulley 20, the pulley shaft 30 and the sliding block 60 are driven to move downwards, at the moment, the pressing rod 63 cannot abut against the switch 40, and no trigger signal is transmitted to the controller. When the lifting assembly driven by the steel wire rope is blocked, the steel wire rope loosens, the pulling force acting on the pulley 20 disappears, at the moment, the elastic force of the torsion spring 50 drives the sliding block 60 on the pulley shaft 30 to reset upwards, so that the pressing rod 63 and the switch 40 generate butt joint triggering signals to control the pulley 20 to ascend or stop, and the protection effect is achieved.
To sum up, the embodiment of the utility model provides a pulley meets and hinders protection device utilizes through ingenious structural design torsional spring 50's elasticity passes through slider 60 drive micro-gap switch has advantages such as compact structure, dependable performance, wide, simple to operate of being suitable for.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a pulley meets and hinders protection device which characterized in that, includes installing support, pulley shaft, switch and torsional spring, the switch install in on the installing support, the pulley install in on the pulley shaft, the pulley shaft can set up with reciprocating on the installing support, the torsional spring butt in the installing support with between the pulley shaft, the torsional spring has the messenger the pulley shaft elasticity power that upwards resets, so that the pulley shaft when upwards resetting with switch looks butt produces triggering signal.
2. The pulley encounter protection device of claim 1 wherein the mounting bracket has two opposite fixing plates, the fixing plates have waist-shaped holes with lengths arranged along an up-down direction, the pulley shaft is mounted on the two waist-shaped holes, and the pulley is located between the two fixing plates.
3. The pulley encounter-block protection device of claim 2, wherein two ends of the pulley shaft are provided with sliding blocks, two ends of the pulley shaft are provided with annular clamping grooves, and the annular clamping grooves fix the sliding blocks on the fixing plate through elastic retaining rings.
4. The pulley encounter protection device of claim 3, wherein one side of the slider is provided with a first boss abutting against the kidney-shaped hole, and the other side of the slider is provided with a second boss abutting against the torsion spring.
5. The pulley chance protection device of claim 4, wherein the first boss is rectangular and the second boss is cylindrical.
6. The pulley encounter protection device of claim 5 wherein the pulley shaft is provided with an anti-rotation flat surface abutting against the slider.
7. The pulley chance of claim 3 hinders protection device, characterized in that still includes the mounting panel that is used for installing the torsional spring, the mounting panel is equipped with the lug that is used for fixing the spring body of torsional spring, the first connecting rod of torsional spring with mounting panel fixed connection, the second connecting rod of torsional spring is located on the slider.
8. The pulley encounter-block protection device of claim 7, wherein the fixing plate is disposed at a front side of the mounting bracket, the mounting plate is disposed at a back side of the mounting bracket, and the second connecting rod is abutted to the sliding block through a through hole.
9. A pulley encounter-block protection device according to claim 3, wherein the slider is provided with a pressing rod, and when the pulley shaft is reset upwards, the pressing rod is abutted with a poke sheet of the switch to generate a trigger signal.
10. The pulley encounter protection device of any of claims 1-9 wherein the switch is a microswitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921886799.3U CN211419419U (en) | 2019-11-04 | 2019-11-04 | Pulley meets and hinders protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921886799.3U CN211419419U (en) | 2019-11-04 | 2019-11-04 | Pulley meets and hinders protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211419419U true CN211419419U (en) | 2020-09-04 |
Family
ID=72252092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921886799.3U Active CN211419419U (en) | 2019-11-04 | 2019-11-04 | Pulley meets and hinders protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211419419U (en) |
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2019
- 2019-11-04 CN CN201921886799.3U patent/CN211419419U/en active Active
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