CN205170201U - Lift by crane equipment and weight stop device thereof - Google Patents
Lift by crane equipment and weight stop device thereof Download PDFInfo
- Publication number
- CN205170201U CN205170201U CN201520813000.3U CN201520813000U CN205170201U CN 205170201 U CN205170201 U CN 205170201U CN 201520813000 U CN201520813000 U CN 201520813000U CN 205170201 U CN205170201 U CN 205170201U
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- intermediate lever
- elastomeric element
- contact
- lever
- fixed
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Abstract
The utility model discloses a weight stop device, including connecting in the stay cord of weight and the limit switch who is fixed in the bottom plate, limit switch's contact is connected with control circuit's switch, and the switch is normal close break contact, still includes: articulate in the middle lever of bottom plate, the stay cord is connected to the lower extreme of middle lever, the lever touches the elastomeric element of contact in the middle of being used for making when the stay cord is lax, lever in the middle of elastomeric element connects, elastomeric element is lighter than the pulling torque of weight to middle lever to the pulling torque of middle lever. This weight stop device has improved limit switch's application mode, has increased limit switch's life. The utility model also discloses a lift by crane equipment of including above -mentioned weight stop device.
Description
Technical field
The utility model relates to technical field of engineering machinery, particularly a kind of counterweight limit device, and in addition, the utility model also relates to a kind of lifting appliance comprising counterweight limit device.
Background technology
In the industrial production, counterweight limit device is a kind of conventional safety guard, to rush to summit accident and cause weight to fall in order to prevent the lifting appliances such as electric block.
A kind of typical counterweight limit device comprises limit switch, stay cord and weight.The upper end of stay cord is connected on the contact of limit switch, and lower end is connected with weight.Be provided with in limit switch and often open moving together contact, for controlling the break-make of the control loop of hoisting heavy.Lifting appliance in working order under, stay cord is straightened and is in tensioned state under the Action of Gravity Field of weight, now touch stay cord upper end connect contact, make control loop be in normally off, suspension hook and lifting thing be lifted.When suspension hook and lifting thing thereof rise to the end position of setting, suspension hook shell can upwards jack-up weight, and the stay cord tightened becomes lax, and contact resets, and control loop is cut off, and plays the protective effect of the rising limit.
Visible, time in working order, due to the control loop closed will be obtained, limit switch need be touched always, thus the contact of limit switch connects spring, lever etc. can be in strained condition for a long time, the speed of this meeting acceleration spring fatigue damage progress, thus have influence on the service life of limit switch.
In addition, most of electric block can produce and tremble in lifting object process, and can produce interference to weight.When weight is interfered in moving process, limit switch needs to bear the variable load except weight deadweight, very big on the impact in service life of limit switch, affects the reliability of counterweight limit device.
Therefore, how improving the application mode of limit switch, make the longer service life of limit switch, is the current technical issues that need to address of those skilled in the art.
Utility model content
Relative to above-mentioned background technology, the purpose of this utility model is to provide a kind of counterweight limit device, improves the application mode of limit switch, the longer service life of limit switch.Another object of the present utility model is to provide a kind of lifting appliance comprising above-mentioned counterweight limit device.
For achieving the above object, the utility model provides following technical scheme:
A kind of counterweight limit device, comprise the stay cord being connected to weight and the limit switch being fixed on base plate, the described contact of limit switch is connected with the switch of control loop, and described switch is normally closed break contact, also comprises:
Be articulated with the intermediate lever of described base plate, the lower end of described intermediate lever connects described stay cord;
For making described intermediate lever touch the elastomeric element of described contact when described stay cord relaxes, described elastomeric element connects described intermediate lever; Described elastomeric element pulls torque to be less than described weight to pull torque to described intermediate lever to described intermediate lever.
Preferably, the upper end of described intermediate lever is connected by draught line with described contact, and described elastomeric element is for being made the upper end of described intermediate lever away from the described elastomeric element of described contact by selfer power.
Preferably, the first end of described elastomeric element is fixed on the upper end of described intermediate lever, and the second end of described elastomeric element is fixed on described base plate, and is positioned at the side of described intermediate lever away from described contact;
Or the first end of described elastomeric element is fixed on the lower end of described intermediate lever, the second end of described elastomeric element is fixed on described base plate, and is positioned at the side of described intermediate lever near described contact.
Preferably, the jointed shaft of described intermediate lever is fixedly connected with described base plate, described elastomeric element is reed, and the first end of described reed is fixed on the upper end of described intermediate lever, and the second end of described reed is fixed on the position away from described contact on described jointed shaft.
Preferably, the jointed shaft of described intermediate lever is fixedly connected with described base plate, described elastomeric element is the reed for making the upper end of described intermediate lever press described contact, the first end of described reed is fixed on the upper end of described intermediate lever, and the second end of described reed is fixed on the position near described contact on described jointed shaft.
Preferably, described contact is roller lever, and the second end of described reed is fixed in the radial direction through hole of described jointed shaft, and the axis extended line of described radial direction through hole is crossing with described roller lever.
Preferably, described base plate is provided with the positive stop for preventing described intermediate lever from excessively rotating, described positive stop is arranged on the direction that described intermediate lever undertakies by described stay cord pulling force or the effect of described elastomeric element restoring force rotating.
A kind of lifting appliance, comprise control setup and counterweight limit device, described counterweight limit device is the counterweight limit device as described in above-mentioned any one.
Counterweight limit device in the utility model uses normally closed break contact, and the contact decreased in limit switch is in the time of strained condition, namely decreases the time that the spring that is connected between contact with normally closed break contact or reed are in strained condition.Further, in conjunction with the setting of intermediate lever and elastomeric element, achieve the indirect control of stay cord to limit switch, when stay cord is tightened, the pull torque of stay cord to intermediate lever is greater than elastomeric element, so contact is free state; When stay cord relaxes, stay cord is to intermediate lever without effect, and elastomeric element makes intermediate lever touch contact by selfer power.In process, the pulling force indirectly-acting of stay cord is on the contact of limit switch.
In original device, often be in the limit switch by triggering conditions, after weight reaches the limit of position, only just can return to the state be not touched, the limit switch in the utility model is then often in the state be not touched, and just can be touched after only having weight to reach the limit of position.The utility model utilizes intermediate lever to achieve the normality that limit switch is not touched and the conversion being subject to triggering conditions, thus improves the application mode of limit switch, and then decreases the replacement frequency of limit switch, cost-saving.
The utility model additionally provide a kind of lifting appliance including above-mentioned counterweight limit device, this service life of equipment is long, and cost is lower.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 provides by the utility model the circuit diagram of the control loop of limit switch inside in the detailed description of the invention of counterweight limit device;
The structural representation that Fig. 2 is the utility model when providing that in the detailed description of the invention one of counterweight limit device, limit switch is not touched;
The structural representation that Fig. 3 is the utility model when providing that in the detailed description of the invention one of counterweight limit device, limit switch is touched;
The structural representation that Fig. 4 is the utility model when providing that in the detailed description of the invention two of counterweight limit device, limit switch is not touched;
The structural representation that Fig. 5 is the utility model when providing that in the detailed description of the invention two of counterweight limit device, limit switch is touched;
The structural representation that Fig. 6 is the utility model when providing that in the detailed description of the invention three of counterweight limit device, limit switch is not touched;
The structural representation that Fig. 7 is the utility model when providing that in the detailed description of the invention three of counterweight limit device, limit switch is touched.
In Fig. 1 to Fig. 7,1 is limit switch, and 2 is base plate, and 3 is contact, and 4 is elastomeric element, and 5 is jointed shaft, and 6 is intermediate lever, and 7 is stay cord, and 8 is weight, and 9 is draught line, and 10 is positive stop, and 11 is normally closed break contact.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Core of the present utility model is to provide a kind of counterweight limit device, and this device improves the application mode of limit switch, increases the service life of counterweight limit device.The utility model additionally provides a kind of lifting appliance comprising above-mentioned counterweight limit device.
Refer to Fig. 1 to Fig. 7, Fig. 1 provides by the utility model the circuit diagram of the control loop of limit switch inside in the detailed description of the invention of counterweight limit device; Fig. 2 to Fig. 7 is the utility model structural representation when providing that in three of counterweight limit device kinds of detailed description of the invention, limit switch is touched or is not touched.
In a kind of detailed description of the invention, counterweight limit device comprises stay cord 7 and limit switch 1, the contact 3 of limit switch 1 is connected with the switch of control loop, this switch is normally closed break contact 11, limit switch 1 is fixed on base plate 2, and base plate 2 is also hinged with intermediate lever 6, and the lower end of stay cord 7 connects weight 8, the upper end of stay cord 7 is connected with the lower end of intermediate lever 6, and intermediate lever 6 is connected with elastomeric element 4.
When stay cord 7 relaxes, elastomeric element 4 can control intermediate lever 6 by the restoring force of self and rotates and touch contact 3 by intermediate lever 6, restoring force refers to that elastomeric element 4 is returned to the elastic force free state process from strained condition, and elastomeric element 4 pairs of intermediate lever 6 pull torque to be less than weight 8 pairs of intermediate lever 6 pull torque, to ensure that the Action of Gravity Field of weight 8 is when the stay cord 7, intermediate lever 6 can be pulled away from original position.Elastomeric element 4 can have all more options, as spring or reed etc.Contact 3 in the application refers to the parts of rear change limit switch 1 on off mode that can be exerted a force by external object that limit switch 1 is arranged.
Wherein, intermediate lever 6 can be connected on base plate 2 by pivot pin, and using pivot pin as jointed shaft 5, certainly, other parts also can be selected as jointed shaft 5, as long as realize hinged object.Elastomeric element 4 one end is fixed on intermediate lever 6, the other end can be fixed on other and relatively-stationary position, contact 3, it should be noted that, the two ends of the application's Elastic parts 4, refer to two ends of elastomeric element 4 in elastic elongation and shrinkage direction.
It should be noted that, due to the intermediate lever 6 used in the utility model, be usually set to the direct rod shape structure that can rotate to vertical state, so the one end claiming intermediate lever 6 to connect stay cord 7 is lower end, the one end not connecting stay cord 7 is upper end.The upper end of the intermediate lever 6 mentioned in literary composition, lower end all represent the orientation relative to jointed shaft 5, do not refer to two attachment points on intermediate lever 6.Certainly, above-mentioned mode intermediate lever 6 being set to straight-bar is only comparatively simple a kind of set-up mode, also other mode can be selected to arrange intermediate lever 6, in other set-up modes, the lower end of intermediate lever 6 all refers to that intermediate lever 6 connects the side of stay cord 7, and the upper end of intermediate lever 6 all refers to that intermediate lever 6 does not connect the side of stay cord 7.
In above-mentioned detailed description of the invention, what arrange in limit switch 1 is normally closed break contact 11, then limit switch 1 in its natural state circuit be closed, when touching the contact 3 of limit switch 1, circuit can be made to disconnect.Between contact 3 and normally closed break contact 11, be provided with the parts such as spring, lever, these spring, levers etc. are arranged on the inside of limit switch 1, and when the on off mode of limit switch 1 changes, the strained condition of above-mentioned spring, lever etc. also changes.
In above-mentioned detailed description of the invention, time in working order, the control loop of limit switch 1 need be in closure state, then the original state that the normally closed break contact 11 in limit switch 1 remains closed, and contact 3 is in original position, and above-mentioned spring, lever etc. are not all by external force; And in ultimate limit state, namely when weight 8 is by jack-up, stay cord 7 relaxes, intermediate lever 6 only acts on by elastomeric element 4, activated contacts 3, the parts such as spring, lever controlling normally closed break contact 11 in limit switch 1 are subject to external force, then normally closed break contact 11 changes into the state of disconnection, and the control loop of limit switch 1 disconnects.
Visible, use normally closed break contact 11, decrease the time of the parts such as the spring of the normally closed break contact 11 of limit switch 1 internal piloting by external force, and then decrease the replacement frequency of limit switch 1, cost-saving.
In working order, weight 8 applies pulling force to stay cord 7, and stay cord 7 is tightened, and the contact 3 of limit switch 1 maintains the original state, and not by external force; Under ultimate limit state, weight 8 is by weight jack-up, stay cord 7 relaxes, and the contact 3 of limit switch 1 is touched by external force, that is, the contact 3 that stay cord 7 applies power and limit switch 1 needs to be applied in the process of power and asynchronous, and in detailed description of the invention provided by the utility model, intermediate lever 6 and elastomeric element 4 achieve the indirect control of weight 8 pairs of limit switches 1.And the pulling force of stay cord 7 connecting weight 8 does not directly act on limit switch 1, then weight 8 is interfered and trembling of producing can not directly act on contact 3 in moving process, thus increases the service life of this equipment, has saved cost.
It should be noted that, above-mentioned mode of operation refers to lifting appliance and promotes object, and state residing time before the end position of lifting thing arrival setting, now stay cord 7 is tensioned state, and ultimate limit state refers to that weight rises to end position jack-up weight 8, state when stay cord 7 relaxes, herein mode of operation, the ultimate limit state implication mentioned of other parts is identical therewith.
In counterweight limit device, draught line 9 can also be connected with between contact 3 and intermediate lever 6, specifically can be connected to the upper end of intermediate lever 6, that is, the upper end of intermediate lever 6 can control contact 3 by the pulling force of draught line 9, and the elastomeric elements such as reed 4 can make the upper end of intermediate lever 6 under elastic-restoring force effect away from contact 3.
Particularly, the first end of elastomeric element 4 can be fixed on the upper end of intermediate lever 6, the second end of elastomeric element 4 is fixed on base plate 2, and is positioned at the side of intermediate lever 6 away from contact 3.
It should be noted that, intermediate lever 6 mentioned in this article refers to away from the side of contact 3, this object and contact 3 lay respectively at the both sides of intermediate lever 6, and intermediate lever 6 refers to the same side that this object and contact 3 lay respectively at intermediate lever 6 near the side of contact 3.
Refer to Fig. 2 and Fig. 3, in a kind of detailed description of the invention of the present utility model, choose the intermediate lever 6 of direct rod shape, limit switch 1 specifically can adopt LX19-111 type limit switch, and the contact 3 on LX19-111 type limit switch is roller lever.Elastomeric element 4 can select spring, certainly, also can select other elastomeric element 4.On a base plate 2, limit switch 1 can be fixed on right side, and when making roller lever be in original state, be vertical state when not namely being touched, the fixed end of roller lever, in below, is touched when roller lever swings left.Intermediate lever 6 can be placed in roller lever left side and near roller lever place.Particularly, the jointed shaft 5 of fixing intermediate lever 6 and the fixed end general horizontal of roller lever can be made.The first end of spring is fixed on the upper end of intermediate lever 6, and the second end is fixed on the base plate 2 on the left of intermediate lever 6, and the lower end of intermediate lever 6 connects stay cord 7, is connected with draught line 9 between the upper end of intermediate lever 6 and roller lever.
When the Action of Gravity Field that stay cord 7 is subject to weight 8 is in tight state, due to spring to intermediate lever 6 pull torque to be less than weight 8 pairs of intermediate lever 6 pull torque, intermediate lever 6 is pulled to vertical state, and intermediate lever 6 does not act on roller lever; When stay cord 7 relaxes, under the restoring force of spring, the upper end of intermediate lever 6 is pulled by spring conter clockwise, and intermediate lever 6 pulls roller lever by draught line 9 and roller lever is swung left, and LX19-111 type limit switch is touched.
Or, the fixed form of above-mentioned spring can be, the first end of spring is fixed on the lower end of intermediate lever 6, second end of spring is fixed on base plate 2, and be positioned at the side of intermediate lever 6 near contact 3, such as, the second end of spring can be fixed on base plate 2, and between roller lever and intermediate lever 6.
In each embodiment above-mentioned provided by the utility model, the elastomeric element 4 specifically can also chosen is reed, concrete set-up mode is as follows, jointed shaft 5 is fixedly installed on a base plate 2, be fixedly connected with for non-rotatable, the first end of reed is fixed on the upper end of intermediate lever 6, second end of reed is fixed on the side away from contact 3 on jointed shaft 5, such as, choose pivot pin as jointed shaft 5, pivot pin is fixed on a base plate 2, radial direction through hole can be provided with on pivot pin, this radial direction through hole tilts relative to roller lever, as, the upper end open of radial direction through hole can be made to be positioned at the left side of the vertical axis of symmetry of pivot pin, second end of reed is inserted in this radial direction through hole and fixes, and the end of reed second end is positioned at the lower end of radial direction through hole, then during reed free state, the upper end of intermediate lever 6 is positioned at the left side of the vertical axis of symmetry of pivot pin, that is, the restoring force of reed can make intermediate lever 6 drive draught line 9 and pull roller lever to swing left.
For the LX19-111 type limit switch selected in each embodiment above-mentioned, set-up mode on a base plate 2, also can for limit switch 1 being fixed on right side, and be vertical state when not being touched when making roller lever be in original state, the fixed end of roller lever, in below, is touched when roller lever swings to the right, now, draught line 9 can not being set between intermediate lever 6 and roller lever, touching contact 3 by pressing roller lever.Specifically refer to Fig. 4 and Fig. 5.Elastomeric element 4 specifically can select reed, the first end of reed is fixed on the upper end of intermediate lever 6, second end of reed is fixed on base plate 2, and be positioned at the position of intermediate lever 6 near contact 3, as being arranged on the base plate 2 between intermediate lever 6 and roller lever, under the restoring force of reed, intermediate lever 6 clickwise, and roller lever can be pressed.
Or, jointed shaft 5 is fixedly installed, near the side of contact 3 on the jointed shaft 5 making the second end of reed be arranged on intermediate lever 6, if choose pivot pin as jointed shaft 5, pivot pin is provided with radial direction through hole, the axis extended line of radial direction through hole can be made crossing with roller lever, namely, this radial direction through hole tilts relative to roller lever, as, the upper end open of radial direction through hole can be made to be positioned at the right side of the vertical axis of symmetry of pivot pin, the second end of reed is made to be inserted in this radial direction through hole and to fix, and the end of reed second end is positioned at the lower end of radial direction through hole, then during reed free state, the upper end of intermediate lever 6 is positioned at the right side of the vertical axis of symmetry of pivot pin, that is, the restoring force of reed can make intermediate lever 6 clickwise and press roller lever.
Certainly, limit switch 1 to be not limited in each embodiment above-mentioned use LX19-111 type limit switch, other limit switch 1 can also be used.It is vertical state that intermediate lever 6 is also not limited to when stay cord 7 is tight, and other modes realized by lever principle also should be belonged in protection domain of the present utility model.
Refer to Fig. 6 and Fig. 7, in a kind of concrete embodiment, LX3-11H type limit switch can be selected, this limit switch 1 mode of touching is the pull bar pulling limit switch 1, LX3-11H type limit switch is arranged on a base plate 2, and make pull bar be vertical direction, and shake-up mode is for pull pull bar downwards, intermediate lever 6 is arranged on the below of pull bar, between pull bar and the upper end of intermediate lever 6, be connected with draught line 9, the lower end of intermediate lever 6 connects stay cord 7, now, the upper end of intermediate lever 6 is positioned at the left side of jointed shaft 5, and lower end is positioned at the right side of jointed shaft 5.Spring can be chosen as elastomeric element 4, the first end of spring is connected to the lower end of intermediate lever 6, second end of spring is fixed on base plate 2, and be positioned at the side of intermediate lever 6 near contact 3, namely the second end of spring is fixed on the top of intermediate lever 6, particularly, the right side of limit switch 1 can be positioned at, under the restoring force of spring, spring pulls the lower end upward movement of intermediate lever 6, and the upper end of intermediate lever 6 pulls pull bar downwards by draught line 9.
Preferably, intermediate lever 6 can be made to be pulled to close to level attitude under the restoring force of spring.Further, can be undertaken by weight 8 Action of Gravity Field or the effect of elastomeric element 4 restoring force the direction that rotates is provided with positive stop 10 by intermediate lever 6 on a base plate 2, as, can positive stop 10 be arranged on the below base plate 2 of above-described embodiment intermediate lever 6, specifically can be positioned at immediately below spring attachment point.
For another example, the first end of above-mentioned spring can be connected to the upper end of intermediate lever 6, second end of spring is fixed on base plate 2, and be positioned at the side of intermediate lever 6 away from contact 3, namely the second end of spring is fixed on the below of intermediate lever 6, particularly, immediately below the pull bar that can be positioned at limit switch 1.
Or, above-mentioned elastomeric element 4 can be set to reed, select pivot pin as jointed shaft 5, the first end of reed is fixed on the lower end of intermediate lever 6, second end of reed is fixed in radial direction through hole set on pivot pin, pivot pin maintains static, and radial direction through hole tilts relative to the vertical axis of symmetry of pivot pin and upper end open is positioned at the right side of the vertical axis of symmetry of pivot pin, and the end of the second end of reed is positioned at the lower end of radial direction through hole.The draught line 9 that the restoring force of reed can drive intermediate lever 6 upper end to connect moves downward, and touches limit switch 1.
In addition, the shape of the intermediate lever 6 in each embodiment above-mentioned is not limited to be direct rod shape.The positive stop 10 mentioned can be arranged in each embodiment above-mentioned, for preventing intermediate lever 6 from excessively rotating, is specifically arranged on direction that intermediate lever 6 undertakies by stay cord 7 pulling force or the effect of elastomeric element 4 restoring force rotating.
Except the counterweight limit device that each embodiment above-mentioned provides, the utility model also provides a kind of lifting appliance comprising counterweight limit device disclosed in above-described embodiment, and this lifting appliance long service life, antijamming capability is good.The structure of other each several parts of this lifting appliance please refer to prior art, repeats no more herein.
In this specification sheets, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
Above lifting appliance provided by the utility model and counterweight limit device thereof are described in detail.Apply specific case herein to set forth principle of the present utility model and embodiment, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping.Should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also carry out some improvement and modification to the utility model, these improve and modify and also fall in the protection domain of the utility model claim.
Claims (8)
1. a counterweight limit device, comprise the stay cord (7) being connected to weight (8) and the limit switch (1) being fixed on base plate (2), the contact (3) of described limit switch (1) is connected with the switch of control loop, it is characterized in that, described switch is normally closed break contact (11), also comprises:
Be articulated with the intermediate lever (6) of described base plate (2), the lower end of described intermediate lever (6) connects described stay cord (7);
For making described intermediate lever (6) touch the elastomeric element (4) of described contact (3) when described stay cord (7) is lax, described elastomeric element (4) connects described intermediate lever (6); Described elastomeric element (4) pulls torque to be less than described weight (8) to pull torque to described intermediate lever (6) to described intermediate lever (6).
2. counterweight limit device according to claim 1, it is characterized in that, the upper end of described intermediate lever (6) is connected by draught line (9) with described contact (3), and described elastomeric element (4) is for being made the upper end of described intermediate lever (6) away from the described elastomeric element (4) of described contact (3) by selfer power.
3. counterweight limit device according to claim 2, it is characterized in that, the first end of described elastomeric element (4) is fixed on the upper end of described intermediate lever (6), second end of described elastomeric element (4) is fixed on described base plate (2), and is positioned at the side of described intermediate lever (6) away from described contact (3);
Or the first end of described elastomeric element (4) is fixed on the lower end of described intermediate lever (6), second end of described elastomeric element (4) is fixed on described base plate (2), and is positioned at the side of described intermediate lever (6) near described contact (3).
4. counterweight limit device according to claim 2, it is characterized in that, the jointed shaft (5) of described intermediate lever (6) is fixedly connected with described base plate (2), described elastomeric element (4) is reed, the first end of described reed is fixed on the upper end of described intermediate lever (6), and the second end of described reed is fixed on the position away from described contact (3) on described jointed shaft (5).
5. counterweight limit device according to claim 1, it is characterized in that, the jointed shaft (5) of described intermediate lever (6) is fixedly connected with described base plate (2), described elastomeric element (4) is the reed for making the upper end of described intermediate lever (6) press described contact (3), the first end of described reed is fixed on the upper end of described intermediate lever (6), and the second end of described reed is fixed on the upper position near described contact (3) of described jointed shaft (5).
6. counterweight limit device according to claim 5, it is characterized in that, described contact (3) is roller lever, and the second end of described reed is fixed in the radial direction through hole of described jointed shaft (5), and the axis extended line of described radial direction through hole is crossing with described roller lever.
7. the counterweight limit device according to claim 1 to 6 any one, it is characterized in that, described base plate (2) is provided with the positive stop (10) for preventing described intermediate lever (6) from excessively rotating, described positive stop (10) is arranged on the direction that described intermediate lever (6) undertakies by described stay cord (7) pulling force or described elastomeric element (4) restoring force effect rotating.
8. a lifting appliance, comprises control setup and counterweight limit device, it is characterized in that, described counterweight limit device is the counterweight limit device described in any one of claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520813000.3U CN205170201U (en) | 2015-10-16 | 2015-10-16 | Lift by crane equipment and weight stop device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520813000.3U CN205170201U (en) | 2015-10-16 | 2015-10-16 | Lift by crane equipment and weight stop device thereof |
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| Publication Number | Publication Date |
|---|---|
| CN205170201U true CN205170201U (en) | 2016-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520813000.3U Withdrawn - After Issue CN205170201U (en) | 2015-10-16 | 2015-10-16 | Lift by crane equipment and weight stop device thereof |
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| CN (1) | CN205170201U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105174063A (en) * | 2015-10-16 | 2015-12-23 | 安徽华菱汽车有限公司 | Hoisting equipment and heavy hammer position limiting device of hoisting equipment |
-
2015
- 2015-10-16 CN CN201520813000.3U patent/CN205170201U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105174063A (en) * | 2015-10-16 | 2015-12-23 | 安徽华菱汽车有限公司 | Hoisting equipment and heavy hammer position limiting device of hoisting equipment |
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