CN215666784U - Limiting mechanism and crane boom - Google Patents
Limiting mechanism and crane boom Download PDFInfo
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- CN215666784U CN215666784U CN202122018365.5U CN202122018365U CN215666784U CN 215666784 U CN215666784 U CN 215666784U CN 202122018365 U CN202122018365 U CN 202122018365U CN 215666784 U CN215666784 U CN 215666784U
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Abstract
The application provides a limiting mechanism and a crane boom, wherein the limiting mechanism comprises a base, a small pulley shaft component, a large pulley shaft component, a transmission part and a trigger mechanism, the small pulley shaft component is connected with the base, and the small pulley shaft component and a screw rod in the crane boom synchronously rotate in the same direction and at the same speed; the large belt pulley shaft assembly is connected with the base; the transmission part is respectively connected with the small pulley shaft assembly and the large pulley shaft assembly, and the small pulley shaft assembly drives the large pulley shaft assembly to rotate through the transmission part; the trigger mechanism is connected with the base, and the large belt pulley shaft assembly is used for exciting the trigger mechanism so as to stop the rotation of the screw rod in the crane arm. The limiting mechanism protects the trigger mechanism and avoids being exposed to a severe working environment.
Description
Technical Field
The application relates to the technical field of cargo booms, in particular to a limiting mechanism and a cargo boom.
Background
A boom stretching and limiting mode of screw and nut transmission generally adopts a non-contact limiting sensor, the non-contact limiting sensor is arranged at the fixed end of a boom, and a limit position stop block is arranged on the fixed point of an extending end. When the non-contact limit sensor approaches the limit position stop block, the control circuit is cut off, and the crane arm stops running. However, the non-contact limit sensor is exposed in a severe working environment, and the condition of failure is easy to occur, so that the crane arm is damaged.
Content of application
The application aims to provide a limiting mechanism and a crane boom so as to reduce the risk of the working environment of a trigger mechanism.
In order to achieve the above purpose, the present application provides the following technical solutions: a limiting mechanism comprises a base, a small pulley shaft assembly, a large pulley shaft assembly, a transmission part and a trigger mechanism, wherein the small pulley shaft assembly is connected with the base, and the small pulley shaft assembly and a screw rod in a crane boom synchronously rotate in the same direction and at the same speed; the large belt pulley shaft assembly is connected with the base; the transmission part is respectively connected with the small pulley shaft assembly and the large pulley shaft assembly, and the small pulley shaft assembly drives the large pulley shaft assembly to rotate through the transmission part; the trigger mechanism is connected with the base, and the large belt pulley shaft assembly is used for exciting the trigger mechanism so as to stop the rotation of the screw rod in the crane arm.
Optionally, the small pulley shaft assembly comprises a first bearing, a small pulley shaft, a first flat key and a small pulley, the first bearing is arranged on the base, the small pulley shaft penetrates through the first bearing, the small pulley shaft and a screw rod in the crane boom synchronously rotate in the same direction and at the same speed, the small pulley penetrates through the small pulley shaft, one side of the first flat key is arranged on the small pulley shaft, the other side of the first flat key is arranged on the small pulley, and the transmission member is connected with the small pulley.
Optionally, the large pulley shaft assembly comprises a second bearing, a large pulley shaft, a second flat key and a large pulley, the second bearing is arranged on the base, the large pulley shaft penetrates through the second bearing, the large pulley shaft penetrates through the large pulley, one side of the second flat key is arranged on the large pulley shaft, the other side of the second flat key is arranged on the large pulley, and the transmission member is connected with the large pulley.
Optionally, the large belt pulley shaft assembly further comprises a screw rod, a third flat key, a nut, a sliding block and a guide rail, the screw rod is inserted into the large belt pulley shaft, one side of the third flat key is arranged on the large belt pulley shaft, the other side of the third flat key is arranged on the screw rod, the nut is in threaded connection with the screw rod, the sliding block is connected with the nut, the guide rail is arranged on the base, and the sliding block is in sliding connection with the guide rail.
Optionally, the large belt pulley shaft assembly further comprises a first set screw, the sliding block and the nut are coaxially and rotatably connected, and the first set screw penetrates through the sliding block and abuts against the nut.
Optionally, the nut is provided with an annular groove coaxial with the screw rod, and the first set screw is inserted into the annular groove.
Optionally, the large pulley shaft assembly further comprises a fine adjustment screw, the fine adjustment screw is in threaded connection with the sliding block, the fine adjustment screw is used for moving in the axial direction of the lead screw, and the fine adjustment screw is used for activating the trigger mechanism.
Optionally, the large pulley shaft assembly further includes a second set screw, and the second set screw penetrates through the sliding block and abuts against the fine adjustment screw.
Optionally, the limiting mechanism further comprises a mounting screw, the base is provided with a waist-shaped hole perpendicular to the large belt pulley shaft assembly, and the mounting screw penetrates through the trigger mechanism to be matched with the waist-shaped hole.
In order to achieve the above purpose, the present application provides the following technical solutions: a cargo boom comprises a speed reducer, a bidirectional flange, a screw rod and any one of the limiting mechanisms, wherein the bidirectional flange is connected with the speed reducer, and small belt wheel shaft assemblies of the screw rod and the limiting mechanism are respectively connected with the bidirectional flange.
Compared with the prior art, the beneficial effects of this application are as follows:
the trigger mechanism is arranged in the limiting mechanism and faces towards the large belt wheel shaft assembly, the large belt wheel shaft assembly is connected with the small belt wheel shaft assembly through the transmission piece, the small belt wheel shaft assembly is connected with the screw rod of the cargo boom to rotate, and after the trigger mechanism is excited, the screw rod of the cargo boom stops rotating, so that the limiting effect is achieved, and in the process, the trigger mechanism does not need to be exposed in a severe working environment and the phenomenon of mistaken touch does not occur. In addition, the small belt wheel shaft assembly drives the large belt wheel shaft assembly to rotate, so that labor is saved in rotation, the large belt wheel shaft assembly rotates more slowly, and the trigger precision of a trigger mechanism is improved.
Drawings
FIG. 1 is a schematic bottom view of a spacing mechanism provided herein;
FIG. 2 is a schematic cross-sectional view taken along the line A-A of FIG. 1 provided herein;
fig. 3 is a side schematic view of a spacing mechanism provided herein.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1 to 3, fig. 1 is a bottom view of a limiting mechanism 100 provided in the present application, fig. 2 is a cross-sectional view in a direction of a-a in fig. 1 provided in the present application, and fig. 3 is a side view of the limiting mechanism 100 provided in the present application.
The application protects a cargo boom, this cargo boom includes speed reducer, two-way flange, screw rod and stop gear 100, and two-way flange is connected with the speed reducer, and the little band pulley axle subassembly 20 of screw rod and stop gear 100 is connected with two-way flange respectively. The limiting mechanism 100 can synchronously rotate with the screw in the same direction and at the same speed, namely the limiting mechanism 100 synchronously rotates with the screw of the crane arm, after the screw rotates for a preset number of revolutions, the limiting mechanism 100 also rotates for the preset number of revolutions, and the trigger mechanism 60 is activated, the trigger mechanism 60 closes the running passage of the screw, the screw stops rotating, and therefore the operation of the screw is effectively limited.
The spacing mechanism 100 includes a base 10, a small pulley shaft assembly 20, a large pulley shaft assembly 30, a transmission 50, and a trigger mechanism 60. The base 10 is a basic framework of the limiting mechanism 100, and may be an independent component or formed by assembling a plurality of components. The small pulley shaft assembly 20 and the large pulley shaft assembly 30 are both wheel train mechanisms, the small pulley shaft assembly 20 is connected with the base 10, the small pulley shaft assembly 20 is connected with a speed reducer through a bidirectional flange, and the small pulley shaft assembly 20 and a screw rod in a crane boom synchronously rotate in the same direction and at the same speed; the large pulley shaft assembly 30 is connected with the base 10; the transmission member 50 is respectively connected with the small pulley shaft assembly 20 and the large pulley shaft assembly 30, the small pulley shaft assembly 20 drives the large pulley shaft assembly 30 to rotate through the transmission member 50, the diameter of a wheel train mechanism of the small pulley shaft assembly 20 is smaller than that of a wheel train mechanism of the large pulley shaft assembly 30, so that the rotating speed of the large pulley shaft assembly 30 is smaller than that of the small pulley shaft assembly 20, and the small pulley shaft assembly 20 can drive the large pulley shaft assembly 30 to slowly rotate in a labor-saving manner so as to improve the movement precision of the large pulley shaft assembly 30; the trigger mechanism 60 is connected to the base 10, and the large pulley shaft assembly 30 will activate the trigger mechanism 60 during slow rotation, and the trigger mechanism 60 will close the screw passage to stop the rotation of the screw in the boom.
In the embodiment, the trigger mechanism 60 is arranged inside the limit mechanism 100 and faces the large pulley shaft assembly 30, the large pulley shaft assembly 30 is connected with the small pulley shaft assembly 20 through the transmission member 50, the small pulley shaft assembly 20 is connected with the screw rod of the boom to synchronize the rotation of the screw rod, and after the trigger mechanism 60 is activated, the screw rod of the boom stops rotating so as to play a limit role, and in the process, the trigger mechanism 60 is not exposed in a severe working environment, and the phenomenon of mistaken touch does not occur. In addition, the small pulley shaft assembly 20 drives the large pulley shaft assembly 30 to rotate, so that the rotation is more labor-saving, and the large pulley shaft assembly 30 rotates more slowly, so that the triggering precision of the triggering mechanism 60 is improved.
The number of the trigger mechanisms 60 can be at least two, at least two trigger mechanisms 60 can be arranged at two opposite ends of the large pulley shaft assembly 30, and the at least two trigger mechanisms 60 are matched with each other to limit the position, so that the screw operation of the crane boom is controlled within the installation range. After the screw rotates forward for a certain number of revolutions, the trigger mechanism 60 at one end of the large pulley shaft assembly 30 is activated, the screw stops rotating forward, and then after the screw rotates backward for a certain number of revolutions, the trigger mechanism 60 at the other end of the large pulley shaft assembly 30 is activated, and the screw stops rotating backward.
The structure of the small pulley shaft assembly 20 and the large pulley shaft assembly 30 will be explained in detail below.
The small pulley shaft assembly 20 comprises a first bearing 21, a small pulley shaft 22, a first flat key 23 and a small pulley 24, wherein the first bearing 21 is arranged on the base 10, the small pulley shaft 22 penetrates through the first bearing 21, the small pulley shaft 22 and a screw rod in a lifting arm synchronously rotate in the same direction and at the same speed, the small pulley 24 penetrates through the small pulley shaft 22, one side of the first flat key 23 is arranged on the small pulley shaft 22, the other side of the first flat key is arranged on the small pulley 24, and the transmission piece 50 is connected with the small pulley 24. The small pulley shaft 22 drives the first flat key 23 to rotate, the first flat key 23 drives the small pulley 24 to rotate, and the small pulley 24 drives the transmission member 50 to rotate, so that motion transmission is realized.
The large pulley shaft assembly 30 comprises a second bearing 31, a large pulley shaft 32, a second flat key 33 and a large pulley 34, the second bearing 31 is arranged on the base 10, the large pulley shaft 32 penetrates through the second bearing 31, the large pulley 34 penetrates through the large pulley shaft 32, one side of the second flat key 33 is arranged on the large pulley shaft 32, the other side of the second flat key is arranged on the large pulley 34, and the transmission piece 50 is connected with the large pulley 34. The transmission member 50 drives the large belt wheel 34 to rotate, the large belt wheel 34 drives the second flat key 33 to rotate, the second flat key 33 drives the large belt wheel shaft 32 to rotate, and the large belt wheel shaft 32 can be used for activating the trigger mechanism 60. The small pulley 24 and the large pulley 34 are present during the above structural description, wherein "large" and "small" mean that the diameter of the small pulley 24 is smaller than that of the large pulley 34 in particular.
The large pulley shaft assembly 30 further comprises a screw 35, a third flat key 36, a nut 37, a slider 38 and a guide rail 39, the screw 35 is inserted into the large pulley shaft 32, one side of the third flat key 36 is arranged on the large pulley shaft 32, the other side of the third flat key is arranged on the screw 35, the nut 37 is in threaded connection with the screw 35, the slider 38 is connected with the nut 37, the guide rail 39 is arranged on the base 10, and the slider 38 is in sliding connection with the guide rail 39. The large pulley shaft 32 drives the third flat key 36 to rotate, the third flat key 36 drives the screw rod 35 to rotate, the nut 37 is in threaded connection with the screw rod 35, the threaded rack of the screw rod 35 pushes the nut 37 to advance, the nut 37 drives the sliding block 38 to move along the extending direction of the guide rail 39, and the sliding block 38 can be used for exciting the trigger mechanism 60.
The large pulley shaft assembly 30 further comprises a first set screw 41, the sliding block 38 and the nut 37 are coaxially and rotatably connected, the sliding block 38 can rotate relative to the nut 37 by any angle to adjust the posture of the sliding block 38 to be aligned with the trigger mechanism 60, and the first set screw 41 penetrates through the sliding block 38 and abuts against the nut 37 to relatively fix the sliding block 38 and the nut 37 together.
The nut 37 is provided with an annular groove coaxial with the screw rod 35, and the first set screw 41 is inserted into the annular groove. When the position of the sliding block 38 needs to be adjusted, the first set screw 41 is screwed out for a part of distance, and the first set screw 41 does not abut against the nut 37 but is inserted into the annular groove, at this time, the sliding block 38 rotates relative to the nut 37, and the first set screw 41 is inserted into the annular groove to play the role of limiting and guiding.
The large pulley shaft assembly 30 further comprises a fine adjustment screw 42, the fine adjustment screw 42 is in threaded connection with the sliding block 38, the fine adjustment screw 42 is used for moving along the axial direction of the screw rod 35, and the fine adjustment screw 42 is used for activating the trigger mechanism 60. During the rotation, the fine adjustment screw 42 can be advanced and retracted relative to the slide 38 in the axial direction of the spindle 35, so that the distance of the fine adjustment screw 42 relative to the trigger organ 60 is changed.
The large pulley shaft assembly 30 further comprises a second set screw 43, and the second set screw 43 penetrates through the sliding block 38 and abuts against the fine adjustment screw 42, so that the second set screw 43 is prevented from shaking in the working process.
The limiting mechanism 100 further comprises a mounting screw 44, the base 10 is provided with a kidney-shaped hole perpendicular to the pulley shaft assembly 30, specifically, perpendicular to the screw rod 35, and the mounting screw 44 penetrates through the trigger mechanism 60 to be matched with the kidney-shaped hole. After the trigger mechanism 60 can move along the extending direction of the kidney-shaped hole to adjust its position, the mounting screw 44 fixes the trigger mechanism 60 on the base 10.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the application, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A spacing mechanism (100), characterized in that said spacing mechanism (100) comprises:
a base (10);
the small pulley shaft assembly (20) is connected with the base (10), and the small pulley shaft assembly (20) and a screw rod in a crane boom synchronously rotate in the same direction and at the same speed;
a large pulley shaft assembly (30) connected to the base (10);
the transmission piece (50) is respectively connected with the small belt wheel shaft assembly (20) and the large belt wheel shaft assembly (30), and the small belt wheel shaft assembly (20) drives the large belt wheel shaft assembly (30) to rotate through the transmission piece (50);
the trigger mechanism (60) is connected with the base (10), and the large belt wheel shaft assembly (30) is used for activating the trigger mechanism (60) so as to stop the rotation of the screw rod in the lifting arm.
2. The limiting mechanism (100) according to claim 1, wherein the small pulley shaft assembly (20) comprises a first bearing (21), a small pulley shaft (22), a first flat key (23) and a small pulley (24), the first bearing (21) is arranged on the base (10), the small pulley shaft (22) penetrates through the first bearing (21), the small pulley shaft (22) and a screw rod in a crane boom rotate synchronously at a constant speed in the same direction, the small pulley (24) penetrates through the small pulley shaft (22), one side of the first flat key (23) is arranged on the small pulley shaft (22), the other side of the first flat key is arranged on the small pulley (24), and the transmission member (50) is connected with the small pulley (24).
3. The limiting mechanism (100) according to claim 1, wherein the large belt pulley shaft assembly (30) comprises a second bearing (31), a large belt pulley shaft (32), a second flat key (33) and a large belt pulley (34), the second bearing (31) is arranged on the base (10), the large belt pulley shaft (32) penetrates through the second bearing (31), the large belt pulley (34) penetrates through the large belt pulley shaft (32), one side of the second flat key (33) is arranged on the large belt pulley shaft (32), the other side of the second flat key is arranged on the large belt pulley (34), and the transmission member (50) is connected with the large belt pulley (34).
4. The limiting mechanism (100) according to claim 3, wherein the large pulley shaft assembly (30) further comprises a lead screw (35), a third flat key (36), a nut (37), a sliding block (38) and a guide rail (39), the lead screw (35) is inserted into the large pulley shaft (32), one side of the third flat key (36) is arranged on the large pulley shaft (32), the other side of the third flat key is arranged on the lead screw (35), the nut (37) is in threaded connection with the lead screw (35), the sliding block (38) is connected with the nut (37), the guide rail (39) is arranged on the base (10), and the sliding block (38) is in sliding connection with the guide rail (39).
5. The limiting mechanism (100) according to claim 4, wherein the large pulley shaft assembly (30) further comprises a first set screw (41), the sliding block (38) and the nut (37) are coaxially and rotatably connected, and the first set screw (41) penetrates through the sliding block (38) and abuts against the nut (37).
6. The spacing mechanism (100) according to claim 5, characterized in that said nut (37) has an annular groove coaxial with said screw (35), said first set screw (41) being inserted in said annular groove.
7. The spacing mechanism (100) according to claim 4, characterized in that said large pulley shaft assembly (30) further comprises a fine adjustment screw (42), said fine adjustment screw (42) being in threaded connection with said slider (38), said fine adjustment screw (42) being intended to move in the axial direction of said screw (35), said fine adjustment screw (42) being intended to activate said trigger mechanism (60).
8. The limiting mechanism (100) according to claim 7, wherein the large pulley shaft assembly (30) further comprises a second set screw (43), and the second set screw (43) penetrates through the sliding block (38) and abuts against the fine adjustment screw (42).
9. The limiting mechanism (100) according to claim 1, wherein the limiting mechanism (100) further comprises a mounting screw (44), the base (10) is provided with a kidney-shaped hole perpendicular to the large pulley shaft assembly (30), and the mounting screw (44) penetrates through the trigger mechanism (60) to be matched with the kidney-shaped hole.
10. A boom, characterized in that the boom comprises a speed reducer, a bi-directional flange, a screw and a limiting mechanism (100) according to any one of claims 1 to 9, the bi-directional flange is connected with the speed reducer, and the screw and a small pulley shaft assembly (20) of the limiting mechanism (100) are respectively connected with the bi-directional flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122018365.5U CN215666784U (en) | 2021-08-25 | 2021-08-25 | Limiting mechanism and crane boom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122018365.5U CN215666784U (en) | 2021-08-25 | 2021-08-25 | Limiting mechanism and crane boom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215666784U true CN215666784U (en) | 2022-01-28 |
Family
ID=79955867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122018365.5U Active CN215666784U (en) | 2021-08-25 | 2021-08-25 | Limiting mechanism and crane boom |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215666784U (en) |
-
2021
- 2021-08-25 CN CN202122018365.5U patent/CN215666784U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220624 Address after: 410000 16th floor, friendship consulting building, No. 339, Xinglian Road, Xiufeng street, Kaifu District, Changsha City, Hunan Province Patentee after: HUNAN TIANJIAN OCEAN ENGINEERING EQUIPMENT Co.,Ltd. Patentee after: Institute of acoustics, Chinese Academy of Sciences Address before: 410000 16th floor, friendship consulting building, No. 339, Xinglian Road, Xiufeng street, Kaifu District, Changsha City, Hunan Province Patentee before: HUNAN TIANJIAN OCEAN ENGINEERING EQUIPMENT Co.,Ltd. |
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| TR01 | Transfer of patent right |