CN107021427B - Rope follow-up feedback structure, method and application thereof - Google Patents
Rope follow-up feedback structure, method and application thereof Download PDFInfo
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- CN107021427B CN107021427B CN201610433824.7A CN201610433824A CN107021427B CN 107021427 B CN107021427 B CN 107021427B CN 201610433824 A CN201610433824 A CN 201610433824A CN 107021427 B CN107021427 B CN 107021427B
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- contact
- rope
- ring spring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
- B66D1/40—Control devices
- B66D1/48—Control devices automatic
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- Mechanical Engineering (AREA)
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Abstract
The invention relates to a rope follow-up feedback structure, a method and application thereof. The rope follow-up feedback structure comprises a rope, a rope connecting column, a connector, a force application block, an outer ring spring, an inner ring spring, a first contact, a second contact and a third contact; the rope connecting column is tightly fixed with the rope outwards in a mode of being separately penetrated and tightened, and a force application block, a first contact, a second contact and a third contact are sequentially arranged from inside to outside, wherein the rope connecting column, the force application block and the first contact are mutually fixed, the inner ring spring is positioned between the bottom end of the rope connecting column and the third contact, and the third contact is supported and fixed through the inner ring spring; the second contact is fixed with the connector; the outer ring spring is positioned between the bottom end of the rope connecting post and the second contact. The invention can be used as a winding and unwinding control component of a power rope, a communication rope, a protection steel rope or a follow-up rope.
Description
Technical Field
The invention relates to a feedback structure for rope follow-up.
Background
The existing equipment at present always finishes the control of a rope winding and unwinding mechanism by measuring the tensioning force of the rope relative to the fixed equipment and the moving equipment and controlling the tensioning force, thereby completing the functional requirement of rope follow-up. But such a structure has some problems.
If the moving machine is in a vertical movement state, the tension sensor is arranged on the moving machine, so that the structure of the moving machine is relatively large, miniaturization cannot be achieved, and the tension sensor is more difficult to combine with the connector. If mounted on a take-up and pay-off fixture, the weight of the long rope itself can interfere considerably with the measurement of tension during long vertical movements. Thus, accurate measurement of tension is achieved, and there are a number of problems with the implementation in long-distance vertical motion machines. Other limit sensors, mechanical sensors and the like have the problems that the installation volume cannot be controlled, and the tensile force or the tension force cannot be accurately measured. Therefore, a set of rope follow-up feedback mechanism and structure capable of being applied to long-distance vertical movement machinery and solving the rope follow-up problem are needed to be developed.
More importantly, there is currently no ready-made connector that can perform both the follower system function as well as the rigid contact function. Therefore, the function of the follow-up system is ensured, and the rope can be in rigid contact and reliable connection with the connector under the condition of being stressed.
In summary, the prior art has the following problems:
1. the feedback signal for control cannot be accurately measured (inaccurate measurement of tension, pulling force or uncertainty of judgment threshold);
2. the existing tension sensor or tension sensor has relatively large measuring structure and cannot be combined with a connector structure;
3. the existing limiting device is large in size and cannot be combined with a connector structure;
4. the mechanical detection is adopted, so that the data acquisition and processing process is often existed, and the structure of the circuit is relatively complex;
5. the connector body can not be contacted with the connector body rigidly after exceeding a threshold tension while the follow-up function provided by the micro displacement is guaranteed, and the connection is guaranteed to be reliable.
Disclosure of Invention
The invention aims to utilize the tiny displacement generated by a rope in the relative motion process as a judging signal source and the switching value as a direct output result of a feedback mechanism.
The specific technical scheme of the invention is as follows:
the rope follow-up feedback structure comprises a rope, a rope connecting column, a connector, a force application block, an outer ring spring, an inner ring spring, a first contact, a second contact and a third contact; the rope connecting column is tightly fixed with the rope outwards in a mode of being separately penetrated and tightened, and a force application block, a first contact, a second contact and a third contact are sequentially arranged from inside to outside, wherein the rope connecting column, the force application block and the first contact are mutually fixed, the inner ring spring is positioned between the bottom end of the rope connecting column and the third contact, and the third contact is supported and fixed through the inner ring spring; the second contact is fixed with the connector; the outer ring spring is positioned between the bottom end of the rope connecting post and the second contact.
The rope connecting column connected with the rope is used for directly transmitting the tiny displacement quantity generated by the rope in the traction or following process to the feedback mechanism, and simultaneously, the force application block and the contact point are driven to move; the contact conducts correspondingly along with the movement of the rope connecting post after the rope starts the rope connecting post, so that the switching value signal is converted; the force application block is in rigid contact with the connector when the force of the rope for driving the rope connecting column exceeds a threshold value determined by the spring, so that the rope and the connector are converted into a rigid connection state;
the rope is divided into several strands, each passing through separate elongated holes in the connecting post.
The invention also provides a feedback method of the rope follow-up feedback structure, which comprises the following steps:
when the rope is in a redundant loose state, the outer ring spring and the inner ring spring are in the longest state, the outer ring spring has certain pre-pressure, and the inner ring spring is completely loose. In the state, the first contact is communicated with the second contact, the second contact is disconnected with the third contact, and the force application block is separated from the connector.
When the rope is in a normal tensioning state, the outer ring springs are compressed in the first step, and the inner ring springs are in an original length state and are completely loosened. In the state, the first contact is disconnected with the second contact, the second contact is disconnected with the third contact, and the force application block is separated from the connector.
When the rope is in an overstretched state, the outer ring spring is compressed by the second step, and the inner ring spring is compressed by the first step. In the state, the first contact is disconnected with the second contact, the second contact is communicated with the third contact, and the force application block is separated from the connector.
When the rope is in a large-force-value actuation state, the outer ring spring is pressed by the third step, and the inner ring spring is pressed by the second step. In the state, the first contact is disconnected with the second contact, the second contact is conducted with the third contact, and the force application block is in full rigid contact with the connector.
The invention also provides the application of the rope follow-up feedback structure as a power rope, a communication rope, a protection steel rope or a follow-up rope winding and unwinding control component.
The rope follow-up feedback mechanism is a winding and unwinding control component for a power rope, a communication rope, a protection steel rope or other follow-up ropes when the mechanical equipment is in the motion process. The main principle is that the small displacement of the rope fixing position caused by the telescopic change is converted into a switching value signal through the electric signal conversion on the detection equipment, so that the control of the winding and unwinding structure is realized. Finally, the purpose is that the motion of the winding and unwinding mechanism can be matched with the motion process of the motion machinery, and the tensioning condition of the follow-up rope is controlled.
As a result of such feedback mechanism implementations, they are often installed at the connection of the rope to the moving part, i.e.: the connector position, therefore, according to its feedback mechanism and the relative characteristic of connector position, has designed the rope follow-up feedback structure that can reliably accomplish the feedback, also can satisfy the installation requirement of connector position simultaneously.
Meanwhile, connectors often require a tight connection with the rope portion itself, i.e.: under the condition of a certain tensile force, the rope is not pulled out of the connector as a whole, and the structure of the connector is not damaged. The magnitude of this force can be much greater than the threshold value of the control and even lead to damage to the sensing structure. A protection structure of two springs is provided in the structure. Ensuring that the cable is in rigid contact with the connector in the second position in the event that a control threshold is exceeded, ensuring full rigid contact of the cable with the connector.
Drawings
Fig. 1 is a cross-sectional view of the mechanical structure of the rope follow-up feedback sensing mechanism.
Detailed Description
In a specific configuration, the cord follows the feedback sensing mechanism as shown in FIG. 1.
The main function of the rope connecting post connected with the rope is to directly transfer the tiny displacement generated by the rope in the traction or following process to the relevant feedback mechanism inside the connector, and simultaneously, the force application block and the contact are actuated to complete the relevant functions. The function of the contact is mainly to conduct correspondingly according to arrangement after the rope drives the rope connecting post to move along with the rope connecting post, so as to finish the function of switching value signal conversion. The function of the force application block is that when the force of the rope to actuate the rope connecting column exceeds the threshold value determined by the spring, the force application block can be in rigid contact with the connector, so that the rope can be converted into a rigid connection state with the connector, and the connection between the rope and the connector is ensured to be reliable under the traction of a large force value.
Mainly the following cases:
(1) The rope is in a redundant loose state, namely the rope tension force F=0, and the contact 6 is in contact conduction with the contact 7;
(2) The rope is in a reasonable tensioning state, namely the rope tension F is smaller than the outer ring spring threshold value, and the first contact 6 and the third contact 8 are not in contact conduction with the second contact 7;
(3) The rope is in an overstretched state, i.e. the rope tension F is greater than the outer ring spring threshold, and the third contact 8 is in contact conduction with the second contact 7.
By analysing these three cases it is possible to clearly obtain the following of the rope to the connector, i.e. the feedback mechanism of the rope follower system has been formed. The paying-off mechanism can be controlled under different conduction conditions of two different pairs of contacts, the paying-off mechanism is controlled to take up wires in a redundant loose state, the paying-off operation is executed when the paying-off mechanism enters an excessive tensioning state, and the paying-off operation is not executed in a reasonable tensioning state.
During this notification, the movement of the cable tie-post and the cable relative to the connector itself is small, negligible for the movement of the entire system. The control feedback system is therefore of considerable reliability.
1. The complete fixation of the rope relative to the pull block is completed by adopting a mode of' split threading and tightening
The connection of the rope to the rope connection post is the key to the overall system. Since the control signal itself is determined by a small displacement of the cable relative to the connector, the moving transmission medium is the cable attachment post. If the rope is not reliably connected with the rope connecting column, displacement transmission is problematic, and the accuracy of control feedback is directly affected.
Meanwhile, the operation angle of the control feedback mechanism needs to be tightly connected, and the absolute fixation of the rope and the rope connecting column is ensured from the angle of stable connection of the rope and the connector, so that the tight connection can be ensured under the condition of large-force actuation. The relative connection is thus made in particular by means of "split-wearing tightens".
The specific operation is as follows: the rope is divided into several strands, which are passed through separate elongated holes in the rope connection post, respectively. After the separation passes, a reweaving cinch is performed at the end of the elongated aperture. The tight combination of the rope and the rope connecting column is ensured, and the pulling force of the rope on the rope connecting column can be equally divided by a plurality of ropes. In this case, the maximum tension of the rope on the rope connection post depends on the rigidity of the rope connection post, and only if the elongated hole 1 of the rope connection post 2 is broken directly, or if the rope breaks, the connection can be separated, and the force is sufficient to ensure the reliability of the relative connection.
2. The tension of the rope to the moving machine is controlled by a spring, a natural threshold value is formed, and whether the rope is in a feedback mode or enters a high-force value mode is controlled
As mentioned above, with respect to the follow-up control of the rope, mainly two state control modes are adopted. The feedback mode is that under the mode of reasonable tensioning force, the rope connecting column is actuated to drive the contact to be opened and closed to generate a feedback signal; under the condition of large force value actuation, namely under the condition of mechanical failure and under the condition of overlarge actuation force at the joint, the rope is ensured not to be pulled out to generate irreversible damage.
The following is an example of fig. 1, in which case analysis is performed:
(1) The ropes being in a redundant slack state
The outer ring spring 5 and the inner ring spring 4 are in the longest state, (the outer ring spring has a certain precompression, and the inner ring spring is completely relaxed). In the state, the first contact 6 is conducted with the second contact 7, the second contact 7 is disconnected with the third contact 8, and the force application block 3 is separated from the connector 9.
(2) The rope being in a reasonably tensioned state
The outer ring springs are compressed in the first step, and the inner ring springs are in an original length state and are fully relaxed. In the state, the first contact 6 is disconnected from the second contact 7, the second contact 7 is disconnected from the third contact 8, and the force application block is separated from the connector.
(3) The rope being in an overstretched state
The outer ring spring is compressed by the second step, and the inner ring spring is compressed by the first step. In the state, the first contact 6 is disconnected from the second contact 7, the second contact 7 is conducted with the third contact 8, and the force application block is separated from the connector.
(4) The rope is in a state of large force value actuation
The outer ring spring is pressed by the third step, and the inner ring spring is pressed by the second step. In the state, the first contact 6 is disconnected from the second contact 7, the second contact 7 is conducted with the third contact 8, and the force application block is in full rigid contact with the connector.
When in the high force actuation state, the contact force between the contacts has reached a maximum value, the remaining force being assumed by the rigid contact between the force application block and the connector. Therefore, the influence on the precise contact structure in the feedback mechanism is reduced, and the reliability of the structure is ensured.
Claims (2)
1. A feedback method of a rope follow-up feedback structure is characterized in that,
the rope follow-up feedback structure comprises a rope, a rope connecting column, a connector, a force application block, an outer ring spring, an inner ring spring, a first contact, a second contact and a third contact; the rope connecting column is tightly fixed with the rope outwards in a mode of being separately penetrated and tightened, and a force application block, a first contact, a second contact and a third contact are sequentially arranged from inside to outside, wherein the rope connecting column, the force application block and the first contact are mutually fixed, the inner ring spring is positioned between the bottom end of the rope connecting column and the third contact, and the third contact is supported and fixed through the inner ring spring; the second contact is fixed with the connector; the outer ring spring is positioned between the bottom end of the rope connecting post and the second contact;
the rope connecting column connected with the rope is used for directly transmitting the tiny displacement quantity generated by the rope in the traction or following process to the feedback mechanism, and simultaneously, the force application block and the contact point are driven to move; the contact conducts correspondingly along with the movement of the rope connecting post after the rope starts the rope connecting post, so that the switching value signal is converted; the force application block is in rigid contact with the connector when the force of the rope for driving the rope connecting column exceeds a threshold value determined by the spring, so that the rope and the connector are converted into a rigid connection state;
the rope is divided into a plurality of strands and respectively passes through independent elongated holes on the connecting column;
the feedback method is as follows:
when the rope is in a redundant relaxation state, the outer ring spring and the inner ring spring are in the longest state, the outer ring spring has certain precompression, and the inner ring spring is completely relaxed; in the state, the first contact is communicated with the second contact, the second contact is disconnected with the third contact, and the force application block is separated from the connector;
when the rope is in a normal tensioning state, the outer ring springs are compressed in the first step, and the inner ring springs are in an original length state and are completely loosened; in the state, the first contact is disconnected with the second contact, the second contact is disconnected with the third contact, and the force application block is separated from the connector;
when the rope is in an overstretched state, the outer ring spring is compressed in the second step, and the inner ring spring is compressed in the first step; in the state, the first contact is disconnected from the second contact, the second contact is communicated with the third contact, and the force application block is separated from the connector; when the rope is in a large-force-value actuation state, the outer ring spring is pressed by the third step, and the inner ring spring is pressed by the second step; in the state, the first contact is disconnected with the second contact, the second contact is conducted with the third contact, and the force application block is in full rigid contact with the connector.
2. Use of the feedback method according to claim 1 as a pay-off and take-up control member for a power cable, a communication cable, a protection cable or a follow-up cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610433824.7A CN107021427B (en) | 2016-06-18 | 2016-06-18 | Rope follow-up feedback structure, method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610433824.7A CN107021427B (en) | 2016-06-18 | 2016-06-18 | Rope follow-up feedback structure, method and application thereof |
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| CN107021427A CN107021427A (en) | 2017-08-08 |
| CN107021427B true CN107021427B (en) | 2023-07-25 |
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| CN201610433824.7A Active CN107021427B (en) | 2016-06-18 | 2016-06-18 | Rope follow-up feedback structure, method and application thereof |
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| CN108478267B (en) * | 2018-02-08 | 2019-12-17 | 中南大学湘雅医院 | Traction device for orthopedics |
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