CN203639035U - Lever hoist load limiting device and lever hoist - Google Patents
Lever hoist load limiting device and lever hoist Download PDFInfo
- Publication number
- CN203639035U CN203639035U CN201320815856.5U CN201320815856U CN203639035U CN 203639035 U CN203639035 U CN 203639035U CN 201320815856 U CN201320815856 U CN 201320815856U CN 203639035 U CN203639035 U CN 203639035U
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- CN
- China
- Prior art keywords
- handle
- lever
- lever hoist
- ratchet wheel
- spring
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- Expired - Fee Related
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- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
Abstract
The utility model discloses a lever hoist load limiting device. The lever hoist load limiting device comprises a transmission sleeve, and the transmission sleeve is sequentially sleeved with a first friction plate, a reversing ratchet wheel, a second friction plate, a spring and a load adjusting nut. A wedge-shaped groove is formed in the wall of an inner hole of the reversing ratchet wheel, and a wedge-caulking cylinder is arranged in the wedge-shaped groove. The utility model further discloses a lever hoist. The lever hoist comprises a transmission shaft and a handle, the transmission shaft is sleeved with the transmission sleeve, the handle is arranged on a handle positioning sleeve in a sleeved mode, and a reversing pawl matched with tooth grooves of the reversing ratchet wheel is arranged on the handle. The hoisting weight of the lever hoist is determined by friction force between the reversing ratchet wheel and the friction plates; when the gravity of weights is larger than the friction force, the reversing ratchet wheel and the friction plates slip relative to each other so that the weights cannot be hoisted, and thus the load limiting function is achieved. When the weights are hoisted into the high altitude, the reversing ratchet wheel is pulled reversely, the reversing ratchet wheel and the transmission sleeve are caulked in a wedged mode through the wedge-caulking cylinder, the weights are lowered from the air, and thus the problem that because the reversing ratchet wheel and the friction plates slip relative to each other, the weights cannot be lowered can be avoided, the working reliability is higher, and the safety performance is better.
Description
Technical field
The utility model relates to a kind of weight-lifting equipment, particularly a kind of Lever Blocks.
Background technology
Lever Blocks is a kind of small lifting equipment, is generally used for the weight below lifting 100T, has the characteristics such as volume is little, lightweight, maneuverability due to it, is used widely.
But, because the load-carrying ability of Lever Blocks is limited, if unclear to the estimation of weight weight, by occurring the situation of Lever Blocks overwork, easily there is lifting safety misadventure, therefore need it that load limit protective device is set, to ensure its trouble free service.
But in prior art, most Lever Blocks is load limiter is set, even if small part Lever Blocks is provided with limit for tonnage protection structure, but its limit for tonnage function is also perfect not, as existing load-limiting protector does not have anti-reverse function.When weight is put on behind high-altitude, load limiter declines because wearing and tearing cause load limiter limit for tonnage ability, now oppositely pulls commutation ratchet weight cannot be put down because load limiter skids, and causes operating irregularity.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of lever hoist load limiter and Lever Blocks, to solve existing Lever Blocks in the perfect not problem of performance aspect limit for tonnage protection.
The utility model lever hoist load limiter, comprise drive socket, on described drive socket external cylindrical surface, be provided with annular lip, on described drive socket, also cover has friction lining first, commutation ratchet, friction lining second, spring and carries nut with the tune of drive socket screw thread fit successively, and described spring carries under nut pressure-acting friction lining second, commutation ratchet, friction lining first and annular lip are compressed to laminating at tune;
On the inner hole wall of described commutation ratchet, be provided with at least twice and, along circumferentially uniform webge slot of endoporus, be provided with wedging cylinder in described webge slot, described commutation ratchet, webge slot, wedging cylinder and drive socket form one-way clutch structure.
Further, described spring is disk spring.
Further, between described spring and friction lining second, be provided with pad, described spring and tune carry between nut and are provided with handle locating bush, on described handle locating bush, be provided with and the annular positioning groove of the handle normal-running fit of Lever Blocks, on described handle locating bush, be also provided with pad and adjusting the backing plate carrying between nut and spring.
A kind of Lever Blocks that is provided with lever hoist load limiter of the utility model, comprise transmission shaft and handle, described drive socket be enclosed within on transmission shaft and with transmission shaft heavy keying fit in a circumferential direction, in the annular positioning groove of described taper knob on handle locating bush, on handle, be provided with the commutation ratchet coordinating with the ratchet teeth groove that commutates.
The beneficial effects of the utility model:
1, the utility model lever hoist load limiter and Lever Blocks, its lifting weight is determined by the friction force commutating between ratchet and friction lining, in the time that weight gravity is greater than friction force, between commutation ratchet and friction lining, just skid, thereby cannot sling weight, realize limit for tonnage function, job security is good; And the large I of friction force is adjusted and carried nut adjusting by rotation, easy to adjust, friction lining is changed also and is facilitated simultaneously, is convenient to safeguard.
2, the utility model lever hoist load limiter and Lever Blocks, its one-way clutch structure is being hung on behind high-altitude weight, the anti-commutation ratchet of pulling, the small end that wedging cylinder is just run to webge slot will commutate ratchet and drive socket wedging, can be smoothly by weight from falling in the air, can avoid because of commutation ratchet and friction slip cause cannot be by the problem of weight let-down, functional reliability is higher, safety is better.
Brief description of the drawings
Fig. 1 be lever hoist load limiter exploded perspective constructional drawing;
The semi-sictional view constructional drawing of Fig. 2 Lever Blocks;
Fig. 3 is the cutaway view of one-way clutch structure.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is further described.
As shown in the figure, the present embodiment lever hoist load limiter, comprise drive socket 1, on the external cylindrical surface of described drive socket 1, be provided with annular lip 101, on described drive socket 1, also cover has friction lining first 2, commutation ratchet 3, friction lining second 4, spring 5 and carries nut 6 with the tune of drive socket 1 screw thread fit successively, and described spring 5 carries under nut 6 pressure-actings friction lining second 4, commutation ratchet 3, friction lining first 2 and annular lip 101 are compressed to laminating at tune;
On the inner hole wall of described commutation ratchet 3, be provided with three roads along circumferentially uniform webge slot 7 of endoporus, in described webge slot 7, be provided with wedging cylinder 8, described commutation ratchet 3, webge slot 7, wedging cylinder 8 and drive socket 1 form one-way clutch structure.
The present embodiment lever hoist load limiter, its lifting weight is determined by the friction force commutating between ratchet 3 and friction lining.When lifting, in the time that weight gravity is greater than friction force, skids, thereby cannot sling weight between commutation ratchet 3 and friction lining, realize limit for tonnage function, job security is good; And the large I of friction force adjusts a year nut 6 to regulate by rotation, easy to adjust, friction lining is changed also and is facilitated simultaneously, is convenient to safeguard.
In lifting process, when weight is being hung on behind high-altitude, the anti-commutation ratchet 3 of pulling, wedging cylinder 8 in its one-way clutch structure is just run to the small end of webge slot 7, thereby will commutate ratchet 3 and drive socket 1 wedging, smoothly by weight from falling in the air, can avoid because of commutation ratchet 3 and friction slip cause cannot be by the problem of weight let-down, functional reliability is higher, and safety is better.
As the improvement to the present embodiment, described spring 5 is disk spring, and disk spring rigidity is large, adopts disk spring can reduce the volume of load limiter and Lever Blocks.
As the improvement to the present embodiment, between described spring 5 and friction lining second 4, be provided with pad 9, described spring 5 and tune carry between nut 6 and are provided with handle locating bush 10, on described handle locating bush 10, be provided with and the annular positioning groove 12 of handle 11 normal-running fiies of Lever Blocks, on described handle locating bush 10, be also provided with pad and adjusting the backing plate carrying between nut 6 and spring 5.Can make spring along circumferentially stressed more even by the backing plate on pad 9 and handle locating bush 10, can avoid spring 5 to damage friction lining second 4 simultaneously.
The present embodiment is provided with the Lever Blocks of lever hoist load limiter, comprise transmission shaft 13 and handle 11, described drive socket 1 be enclosed within on transmission shaft 13 and with transmission shaft 13 heavy keying fit in a circumferential direction, described handle 11 is enclosed within the annular positioning groove 12 on handle locating bush 10, is provided with the commutation ratchet 14 coordinating with ratchet 3 teeth groove that commutate on handle 11.The present embodiment Lever Blocks, because it has had the lever hoist load limiter in aforementioned, makes its limit for tonnage defencive function more perfect, and job security, reliability are higher.
Finally explanation is, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (4)
1. a lever hoist load limiter, it is characterized in that: comprise drive socket, on described drive socket external cylindrical surface, be provided with annular lip, on described drive socket, also cover has friction lining first, commutation ratchet, friction lining second, spring and carries nut with the tune of drive socket screw thread fit successively, and described spring carries under nut pressure-acting friction lining second, commutation ratchet, friction lining first and annular lip are compressed to laminating at tune;
On the inner hole wall of described commutation ratchet, be provided with at least twice and, along circumferentially uniform webge slot of endoporus, be provided with wedging cylinder in described webge slot, described commutation ratchet, webge slot, wedging cylinder and drive socket form one-way clutch structure.
2. lever hoist load limiter according to claim 1 and Lever Blocks, is characterized in that: described spring is disk spring.
3. lever hoist load limiter according to claim 1 and Lever Blocks, it is characterized in that: between described spring and friction lining second, be provided with pad, described spring and tune carry between nut and are provided with handle locating bush, on described handle locating bush, be provided with and the annular positioning groove of the handle normal-running fit of Lever Blocks, on described handle locating bush, be also provided with pad and adjusting the backing plate carrying between nut and spring.
4. one kind is provided with the Lever Blocks of arbitrary described lever hoist load limiter in claim 1-3, it is characterized in that: comprise transmission shaft and handle, described drive socket be enclosed within on transmission shaft and with transmission shaft heavy keying fit in a circumferential direction, in the annular positioning groove of described taper knob on handle locating bush, on handle, be provided with the commutation ratchet coordinating with the ratchet teeth groove that commutates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320815856.5U CN203639035U (en) | 2013-12-11 | 2013-12-11 | Lever hoist load limiting device and lever hoist |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320815856.5U CN203639035U (en) | 2013-12-11 | 2013-12-11 | Lever hoist load limiting device and lever hoist |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203639035U true CN203639035U (en) | 2014-06-11 |
Family
ID=50870298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320815856.5U Expired - Fee Related CN203639035U (en) | 2013-12-11 | 2013-12-11 | Lever hoist load limiting device and lever hoist |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203639035U (en) |
-
2013
- 2013-12-11 CN CN201320815856.5U patent/CN203639035U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140611 Termination date: 20171211 |