CN201330133Y - Lever hoist load limiter - Google Patents
Lever hoist load limiter Download PDFInfo
- Publication number
- CN201330133Y CN201330133Y CNU2009201120842U CN200920112084U CN201330133Y CN 201330133 Y CN201330133 Y CN 201330133Y CN U2009201120842 U CNU2009201120842 U CN U2009201120842U CN 200920112084 U CN200920112084 U CN 200920112084U CN 201330133 Y CN201330133 Y CN 201330133Y
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- CN
- China
- Prior art keywords
- stop
- nut
- spring
- limit
- tonnage
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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.)
- Expired - Lifetime
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- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
Abstract
This utility model discloses a lever hoist load limiter, including a stop nut, with which a load limit piece I, a reversing ratchet wheel, a load limit piece II, a spring and an adjusting nut are sleeved in order, where the reversing ratchet wheel and the spring are sleeved with the stop nut; one end of the spring is against the load limit piece II, while the other end of the spring is against with adjusting nut; the screw thread of the adjusting nut is connected with the screw thread of the stop nut; the central hole of the reversing ratchet wheel is a ratchet wheel hole; the stop nut is provide with at least one radial counter bore with a stop spring and stop pin inside on the circumference of the reversing ratchet wheel, where the stop pin is against the wall of the central hole of the reversing ratchet wheel, to thereby form a uni-directional overrunning clutch structure; the load limit II is sleeved with the stop nut in a movable manner in a fixed axial direction of a circumferential direction. This technical solution is advanced with stable load limit, little wave range, and is provided with anti-reversing means, which makes the load limiter skip to limit load when lifting heavy objects with overload, and guarantee descending the heavy objects in safe.
Description
Technical field
The utility model belongs to small-sized elevator machinery field, particularly relates to a kind of Lever Blocks load limiter.
Background technology
Lever Blocks is a kind of small-sized hand crane tool, is mainly used in the operation such as fastening of lifting, traction and the member of weight, and range of use is wide, and the domestic and international market demand is big.When Lever Blocks used in reality, sometimes because of the inaccurate overload that occurs of the weight of heavy estimation of hoisting is used, in case serious overload then may cause the safety misadventure generation, therefore, in order to ensure safe in utilization, Lever Blocks often required to install load limitation device.
At present, the load limiter of domestic Lever Blocks exists following two problems usually:
(1) limit for tonnage value instability, fluctuation range is big: the stability of limit for tonnage value is an important performance indexes of Lever Blocks load limiter.The too small weight that may make Lever Blocks not promote rated load of limit for tonnage value excessively potential safety hazard may occur again, and therefore, the fluctuation range of limit for tonnage value should be not excessive, otherwise can influence the use of Lever Blocks.
(2) no reverse-rotation preventing function: the Lever Blocks of band load limiter in actual use, when upgrading a weight, owing to overload causes load limiter to skid, will put down weight this moment, need the counter-rotating load limiter, if the limit for tonnage cucurbit does not have reverse-rotation preventing function, load limiter just might also skid when counter-rotating, thereby fail to lay down weight, influence is used.
Summary of the invention
In order to solve above-mentioned technical matters, the purpose of this utility model provides a kind of Lever Blocks load limiter, this load limiter not only limit for tonnage is stable, fluctuation range is little, and design has anti-reverse mechanism, the limit for tonnage of just skidding that overloads makes when load limiter can be guaranteed to promote weight in case can guarantee to fall safely weight again.
To achieve the above object, the utility model has adopted following technical scheme:
A kind of Lever Blocks load limiter, comprise the stop-off nut that is threaded on the Lever Blocks major axis, be arranged with limit for tonnage sheet first on the stop-off nut successively, the commutation ratchet, limit for tonnage sheet second, spring and adjustment nut, described commutation ratchet and spring sky are enclosed within on the stop-off nut, described spring one end and limit for tonnage sheet second offset, the described spring other end and adjustment nut offset, described adjustment nut is threaded on the screw thread of stop-off nut, the centre hole of described commutation ratchet is the ratchet hole, described stop-off nut is provided with at least one radially counterbore on the circumference of sky cover commutation ratchet, radially be provided with stop spring and stop pin in the counterbore, thereby the center hole wall of described stop pin and commutation ratchet offsets and constitutes the mono-directional overrun clutch structure, and described limit for tonnage sheet second is socketed on the stop-off nut to mode movably with circumferential anchor shaft.
As preferably, above-mentioned limit for tonnage sheet second comprises that a laminar substrate and one deck are fixed in the friction lining on the substrate, the centre hole of described substrate for be located at stop-off nut on the cubic groove cubic hole of matching, described spring and substrate offset, described friction lining contacts with the ratchet that commutates.Make things convenient for processing and manufacturing like this, have reliability preferably simultaneously, substrate and friction lining preferably adopt and are adhesively fixed.
As preferably, radially counterbore and cubic groove position are 45 ° on the above-mentioned stop-off nut.
As preferably, above-mentioned spring is a disk spring.
As preferably, above-mentioned limit for tonnage sheet first is the friction lining that high-abrasive material is made.
The utility model is compared with domestic existing Lever Blocks load limiter owing to adopted above technical scheme, and the Lever Blocks load limiter of our development and Design has following two big characteristics:
(1) limit for tonnage value stabilization, fluctuation range is little.Because limit for tonnage sheet second adopts integral form, and be shaped with stop-off nut and connect circumferentially fixingly, the location is reliable, and the limit for tonnage face that skids is stablized, so limit for tonnage is reliable and stable.
(2) design have anti-reverse mechanism (mono-directional overrun clutch structure), this device can guarantee load limiter when promoting weight in case overload just can be skidded limit for tonnage, the while can guarantee to put down safely and reliably weight again.Anti-reverse mechanism is made up of ratchet hole, stop pin, stop spring on the commutation ratchet; the ratchet of not only can guaranteeing to commutate can only positive dirction rotate; reversing sense is motionless, and can avoid anti-reverse effect instability that the mono-directional overrun clutch structure of ratchet form exists, stuckly easily can't discharge, defective such as processing and manufacturing cost height.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the A-A section-drawing of Fig. 1.
Fig. 3 is an axonometric drawing of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present utility model is made a detailed explanation.
Embodiment 1:
Lever Blocks load limiter as shown in Figure 1-Figure 3 is made up of stop-off nut 1, limit for tonnage sheet first 2, commutation ratchet 3, limit cut-parts second 4, disk spring 5, adjustment nut 6, stop pin 7, stop spring 8, assembly relation between them is: limit for tonnage sheet first 2 and commutation ratchet 3 skies are enclosed within on the stop-off nut 1, and the centre hole of commutation ratchet 3 is ratchet hole 3a; Stop pin 7 and stop spring 8 are contained in the radially counterbore 1a of stop-off nut 1, and radially head on commutation ratchet 3, and 7 of stop pins allow commutation ratchet 3 just changeing, and stop its counter-rotating; Limit for tonnage sheet second 4 is contained on the cubic groove 1b of stop-off nut 1 by cubic hole 4a, makes limit for tonnage sheet second 4 to move axially and can not rotate; Disk spring 5 skies are enclosed within on the stop-off nut 1, are supporting limit for tonnage sheet second 4; Adjustment nut 6 is screwed on the screw thread 1c of stop-off nut 1; Handwheel 9 matches by the groove 3b on flange 9a and the commutation ratchet 3.
In the present embodiment, described limit for tonnage sheet second 4 comprises that a laminar substrate and one deck are fixed in the friction lining on the substrate, the centre hole of described substrate for be located at stop-off nut 1 on the cubic hole 4a that matches of cubic groove 1b, described spring 5 offsets with substrate, described friction lining contacts with the ratchet 3 that commutates; Radially counterbore 1a and cubic groove 1b position are 45 ° on the described stop-off nut 10; The friction lining that described limit for tonnage sheet first 2 is made for high-abrasive material, certainly as preferred version, limit for tonnage sheet first 2 also can adopt with the same structure of limit for tonnage sheet second 4 and be socketed on the stop-off nut to mode movably with circumferential anchor shaft, perhaps directly be adhesively fixed on stop-off nut or the commutation ratchet, can further guarantee the limit for tonnage value stabilization like this, dwindle fluctuation range.
The principle of work of Lever Blocks load limiter is: when promoting weight, pull handle 12 with hand, commutation ratchet 13 on the handle 12 heads on the commutating tooth 3c on the commutation ratchet 3, driving commutation ratchet 3 rotates, because commutation ratchet 3 is tightly clamped by limit for tonnage sheet first 2 and limit for tonnage sheet second 4 under the effect of disk spring 5 elastic forces, therefore commutation ratchet 3 drives stop-off nut 1 rotation under the effect of friction force, thereby drives major axis 11, promotes weight.Commutation ratchet 3 is only relevant with the elastic force of disk spring 5 by the size of the power that limit for tonnage sheet first, second clamps, and finishes in case adjustment nut 6 is adjusted, and this gripping power is determined thereupon.When promoting weight greater than the limit for tonnage amount of load limiter, commutation ratchet 3 will skid, thereby limits load.When oppositely pulling handle 12 with hand, handle 12 heads on the commutating tooth 3c of commutation on the ratchet 3 by commutation ratchet 13, reverse drive commutation ratchet 3 rotates, because stop pin 7 stops 3 counter-rotatings of commutation ratchet, make commutation ratchet 3 drive stop-off nut 1 counter-rotating by stop pin 7, thereby make the absent-mindedness of cucurbit drg, fall weight.
Claims (5)
1. Lever Blocks load limiter, comprise the stop-off nut (1) that is threaded on the Lever Blocks major axis (11), be arranged with limit for tonnage sheet first (2) on the stop-off nut (1) successively, commutation ratchet (3), limit for tonnage sheet second (4), spring (5) and adjustment nut (6), described commutation ratchet (3) and spring (5) sky are enclosed within on the stop-off nut (1), described spring (5) one ends and limit for tonnage sheet second (4) offset, described spring (5) other end and adjustment nut (6) offset, described adjustment nut (6) is threaded on the screw thread (1c) of stop-off nut (1), it is characterized in that, the centre hole of described commutation ratchet (3) is ratchet hole (3a), described stop-off nut (1) is provided with at least one radially counterbore (1a) on the circumference of sky cover commutation ratchet (3), radially be provided with stop spring (8) and stop pin (7) in the counterbore (1a), described stop pin (7) with commutation ratchet (3) thus the center hole wall offset and constitute the mono-directional overrun clutch structure, described limit for tonnage sheet second (4) is socketed on the stop-off nut (1) to mode movably with circumferential anchor shaft.
2. a kind of Lever Blocks load limiter according to claim 1, it is characterized in that, described limit for tonnage sheet second (4) comprises that a laminar substrate and one deck are fixed in the friction lining on the substrate, the centre hole of described substrate for be located at stop-off nut (1) on cubic groove (1b) the cubic hole (4a) of matching, described spring (5) offsets with substrate, and described friction lining contacts with commutation ratchet (3).
3. a kind of Lever Blocks load limiter according to claim 2 is characterized in that, radially counterbore (1a) and cubic groove (1b) position are 45 ° on the described stop-off nut (10).
4. according to claim 1 or 2 or 3 described a kind of Lever Blocks load limiters, it is characterized in that described spring (5) is a disk spring.
5. according to claim 1 or 2 or 3 described a kind of Lever Blocks load limiters, it is characterized in that the friction lining that described limit for tonnage sheet first (2) is made for high-abrasive material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201120842U CN201330133Y (en) | 2009-01-05 | 2009-01-05 | Lever hoist load limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201120842U CN201330133Y (en) | 2009-01-05 | 2009-01-05 | Lever hoist load limiter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201330133Y true CN201330133Y (en) | 2009-10-21 |
Family
ID=41223507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009201120842U Expired - Lifetime CN201330133Y (en) | 2009-01-05 | 2009-01-05 | Lever hoist load limiter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201330133Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105035992A (en) * | 2015-09-01 | 2015-11-11 | 浙江冠林机械有限公司 | Spanner device of lever block |
| CN106678193A (en) * | 2016-12-16 | 2017-05-17 | 柯迈(杭州)起重机械有限公司 | Novel loading limiting clutch |
-
2009
- 2009-01-05 CN CNU2009201120842U patent/CN201330133Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105035992A (en) * | 2015-09-01 | 2015-11-11 | 浙江冠林机械有限公司 | Spanner device of lever block |
| CN106678193A (en) * | 2016-12-16 | 2017-05-17 | 柯迈(杭州)起重机械有限公司 | Novel loading limiting clutch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091021 |