CN102774608A - Electric roller - Google Patents
Electric roller Download PDFInfo
- Publication number
- CN102774608A CN102774608A CN2011101219493A CN201110121949A CN102774608A CN 102774608 A CN102774608 A CN 102774608A CN 2011101219493 A CN2011101219493 A CN 2011101219493A CN 201110121949 A CN201110121949 A CN 201110121949A CN 102774608 A CN102774608 A CN 102774608A
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- CN
- China
- Prior art keywords
- ratchet
- ratchets
- holdback
- overcoat
- motorized pulleys
- Prior art date
- 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 electric roller which comprises a backstop. The backstop comprises a ratchet wheel and an outer sleeve, wherein the ratchet wheel is fixed relative to a spindle; the outer sleeve is coated outside the ratchet wheel and is fixed relative to the roller; a plurality of ratchets are distributed on the outer periphery of the ratchet wheel; balls are arranged between the adjacent ratchets; the balls are contacted and matched with the inner wall of the outer sleeve; the ratchets are of a landing shape; and the ratchets are in surface contact with the inner wall of the outer sleeve. According to the electric roller disclosed by the invention, the backstop arranged inside the electric roller has simple structure and long service life, and not only can be used for preventing the roller from reversely rotating, but also is convenient to maintain.
Description
Technical field
The present invention relates to a kind of device for transporting objects, relate in particular to a kind of motorized pulleys that are used for belt conveyer or lifting means.
Background technology
Motorized pulleys are widely used in departments such as mine, metallurgy, chemical industry, coal, building materials, electric power, grain and communications and transportation as the power of equipment such as belt transporter and lifting.Installation form has electric machine built-in, external and portable.When convey materials, use holdback through regular meeting in order to prevent that motorized pulleys from reversing with respect to motor shaft.
For example disclose a kind of motorized pulleys, had high speed shaft and cylinder extend neck, between high speed shaft and the cylinder extend neck ratchet holdback has been set with backstop in Chinese utility model 200720043254.7.Referring to Fig. 1; This holdback is by the ratchet 4 that is fixed on the main shaft 2, and is wrapped in ratchet 4 exterior overcoats 1 and constitutes, and overcoat 1 is fixed with respect to cylinder; Overcoat 1 is hinged with the non-return pin 6 that can swing; Under the qualification of non-return pin 6, only allow overcoat 1 to be rotated in the forward with respect to main shaft 2, but the stress that mono-non-return pin 6 receives is bigger, fatiguability is impaired.
Ratchet is roughly the pinnacle in addition, and ratchet is the edge, top on pinnacle with contacting of outer casing inner wall, is the line contact, and the intensity of ratchet receives certain influence.
Summary of the invention
The invention provides a kind of motorized pulleys, its inside has been installed simple in structure, and intensity is good, the holdback of long service life, can prevent the counter-rotating of cylinder.
A kind of motorized pulleys comprise holdback, and described holdback comprises the ratchet that relative main shaft is fixing; And be wrapped in the exterior overcoat fixing of ratchet with respect to cylinder; The excircle of described ratchet is distributed with some ratchets, is provided with ball between the adjacent ratchet, the ball cooperation that contacts with the inwall of overcoat; Described ratchet is a trapezoidal shape, contacts for face between ratchet and the outer casing inner wall.
Prior art can be adopted in the installation site of the holdback in the motorized pulleys of the present invention; Focus on having made non-return pin of the prior art into ball; When cylinder drives mantle reversal; Ball edge and its contacted ratchet inclined-plane gradually with tensioner between overcoat and the ratchet, make the overcoat can't be with respect to the main shaft contrarotation.
The excircle of described ratchet is evenly distributed with 6～16 ratchets.Suitable ratchet quantity can be dispersed in expanding force each position of ratchet uniformly.
As preferably, the excircle of described ratchet is evenly distributed with 6～10 ratchets.
The ratchet intensity of trapezoidal shape is high, is out of shape in the time of can avoiding receiving the ball extruding.
Motorized pulleys of the present invention, its inner holdback of installing is simple in structure, and long service life not only can prevent the counter-rotating of cylinder but also easy to maintenance.
Description of drawings
Fig. 1 is the structural representation of the holdback of motorized pulleys in the prior art;
Fig. 2 is the structural representation of holdback in the motorized pulleys of the present invention.
The specific embodiment
Referring to Fig. 2, in the motorized pulleys of the present invention holdback is installed, be holdback owing to improve, therefore omit other parts.
Holdback comprises the ratchet 4 that relative main shaft 2 is fixing, and is wrapped in the ratchet 4 exterior overcoats 1 fixing with respect to cylinder, and the excircle of ratchet 4 is distributed with some ratchets, is provided with ball 3 between the adjacent ratchet, ball 3 cooperation that contacts with the inwall of overcoat 1.
In the present embodiment; The excircle of ratchet 4 is evenly distributed with 8 ratchets; (for example ratchet 4 is motionless among the figure when cylinder drives overcoat 1 with respect to ratchet 4 counter-rotatings; Overcoat 1 left-hand revolution), the drive lower edge of ball 3 its external sleeve 1 inwall and its contacted ratchet inclined-plane gradually with tensioner between overcoat 1 and the ratchet 4, make the overcoat 1 can't be with respect to main shaft 2 contrarotations.
Ratchet is roughly trapezoidal shape in addition, and the contact site of ratchet and overcoat 1 inwall is the end face 5 of trapezoidal shape, is face contact, not only can strengthen the intensity of ratchet, is out of shape when avoiding receiving the ball extruding, guarantees to prevent the effect of reversing.Holdback in the motorized pulleys of the present invention is simple in structure, and intensity is good, long service life.
Claims (3)
1. motorized pulleys comprise holdback, and described holdback comprises the ratchet that relative main shaft is fixing; And be wrapped in the exterior overcoat fixing of ratchet with respect to cylinder; It is characterized in that the excircle of described ratchet is distributed with some ratchets, be provided with ball between the adjacent ratchet; The ball cooperation that contacts with the inwall of overcoat, described ratchet is a trapezoidal shape.
2. motorized pulleys as claimed in claim 1 is characterized in that, the excircle of described ratchet is evenly distributed with 6～16 ratchets.
3. motorized pulleys as claimed in claim 2 is characterized in that, the excircle of described ratchet is evenly distributed with 6～10 ratchets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101219493A CN102774608A (en) | 2011-05-12 | 2011-05-12 | Electric roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101219493A CN102774608A (en) | 2011-05-12 | 2011-05-12 | Electric roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102774608A true CN102774608A (en) | 2012-11-14 |
Family
ID=47119759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101219493A Pending CN102774608A (en) | 2011-05-12 | 2011-05-12 | Electric roller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102774608A (en) |
-
2011
- 2011-05-12 CN CN2011101219493A patent/CN102774608A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121114 |