CN116789012A - Rope extension mechanism, extension method thereof and crane - Google Patents

Abstract

The invention discloses a rope extension mechanism, an extension method thereof and a crane, which belong to the technical field of cranes and comprise a basic arm, an extension cylinder, an extension arm pulley, an extension arm rope row, a retraction arm pulley, a retraction arm rope row and a rope row fixing seat; the cylinder rod and the cylinder barrel of the telescopic cylinder are respectively fixed on the basic arm and the second telescopic arm; the first arm extension rope is connected with the first rope row fixing seat and the third section of telescopic arm by bypassing the first arm extension pulley, and the rest arm extension ropes are connected with the corresponding rope row fixing seat and the lower section of telescopic arm of the telescopic arm installed by the corresponding arm extension pulley by bypassing the corresponding arm extension pulley; the first telescopic arm rope is connected with the first rope row fixing seat and the third telescopic arm by bypassing the first telescopic arm pulley, and the rest telescopic arm ropes are connected with the corresponding rope row fixing seat and the lower telescopic arm of the telescopic arm installed by the corresponding telescopic arm pulley by bypassing the corresponding telescopic arm pulley. The invention can realize heavy lifting load and solve the problems of smaller lifting load weight and small application range of the existing rope-type telescopic structure.

Description

Rope extension mechanism, extension method thereof and crane

Technical Field

The invention relates to the technical field of cranes, in particular to a rope extension mechanism, an extension method thereof and a crane.

Background

The main arm telescopic structure of the existing automobile crane mainly has two forms, namely an oil cylinder rope row type structure and a single-cylinder bolt type structure. For the oil cylinder rope row type, because of the winding mode of the steel wire rope, the axial force born by the tail arm is transferred to the secondary tail telescopic arm and the third telescopic arm in a double ratio, for example, the tail telescopic arm bears the axial force of 10 tons, the secondary tail telescopic arm can bear 20 tons, when heavy objects are hung, the rear arm section is stressed greatly, the oil cylinder and the rope row are difficult to bear, the whole weight capable of being hung is small, and the problem of small application range is obvious. For single cylinder bolt type, the telescopic cylinder is driven by a telescopic cylinder, the telescopic cylinder is combined with telescopic arms to be telescopic through a cylinder pin, the telescopic arms to be telescopic are released from fixation with other arms through arm pins, and the telescopic arms are telescopic.

The patent literature discloses a telescopic boom structure, for example, chinese patent application number 200910149146.1 discloses an automobile crane and a multi-section boom telescopic boom device thereof, and the principle is that an oil cylinder is arranged on the inner side of a tail section telescopic boom, a minor tail section telescopic boom is pulled and stretched out by the oil cylinder through a first boom wheel and a first boom cable, a tail section telescopic boom is pulled and stretched out by the minor tail section arm through a second boom wheel and a second boom cable, and other telescopic booms are stretched out in a mode similar to a horizontal bar bolt by an oil cylinder matched boom pin and a cylinder pin. For the horizontal bar bolt type telescopic boom, only the telescopic efficiency of the last telescopic boom and the next last telescopic boom is solved, and the efficiency is not raised and lowered reversely and the problem of complicated operation steps is not improved for the oil cylinder rope type telescopic boom.

For another example, chinese patent application No. 202020653960.9 discloses an automobile crane boom control system, and chinese patent application No. 201420033209.3 discloses an automobile crane boom free telescoping control system. The two patents are all that the information of other sensors such as a long angle sensor or an oil cylinder position sensor is collected through a moment limiter to control the extension length of the telescopic arm of the double-oil cylinder rope-row crane so as to improve the safety and reduce the operation difficulty, but the problem that the whole oil cylinder rope-row crane is small in weight and small in application range is not solved.

In sum, how to solve the problems of smaller lifting weight and small application range of the crane on the basis of ensuring the expansion and contraction efficiency and simple operation steps is a technical problem faced in the field.

Disclosure of Invention

The invention aims to provide a rope extension and retraction mechanism, a retraction method and a crane thereof, which solve the problems in the prior art, and can select whether a certain rope extension and retraction arm fixing seat is fixed with a telescopic arm according to the requirement when the rope extension and retraction mechanism is in heavy load, and when the rope extension and retraction arm is not fixed, the corresponding telescopic arm is not stressed and is not retracted relative to the previous telescopic arm, so that heavy lifting load can be realized, and the problems of small lifting load weight and small application range of the existing rope extension and retraction structure are solved.

In order to achieve the above object, the present invention provides the following solutions:

the invention provides a rope extension mechanism which comprises a basic arm, at least two sections of extension arms, an extension cylinder, an extension arm pulley, an extension arm rope row, a retraction arm pulley, a retraction arm rope row and a rope row fixing seat, wherein the extension arm, the extension cylinder, the extension arm pulley, the extension arm rope row, the retraction arm rope row and the rope row fixing seat are sleeved in the basic arm in sequence;

the cylinder rod of the telescopic cylinder is fixed on the basic arm, and the cylinder barrel of the telescopic cylinder is fixed on the second section of telescopic arm; the cylinder barrel and the telescopic arms except the basic arm, the second telescopic arm and the last telescopic arm are respectively provided with an arm extending pulley; the telescopic arms except the basic arm and the tail telescopic arm are respectively provided with one telescopic arm pulley; the rope row fixing seats are correspondingly arranged on the telescopic arms except the tail telescopic arm and the minor tail telescopic arm and are used for fixing the connecting ends of the connected arm extension rope row and the arm retraction rope row;

the first arm extending rope is wound around the first arm extending pulley, one end of the first arm extending rope is connected with the first rope row fixing seat, the other end of the first arm extending rope is connected with the third section of telescopic arm, the rest of the arm extending rope rows are wound around the corresponding arm extending pulleys, one end of the first arm extending rope is connected with the corresponding rope row fixing seat, and the other end of the first arm extending rope is connected with the lower section of telescopic arm of the telescopic arm installed on the corresponding arm extending pulley;

the first arm-shrinking rope is arranged around the first arm-shrinking pulley, one end of the first arm-shrinking rope is connected with the first rope-arranging fixing seat, the other end of the first arm-shrinking rope is connected with the third section of telescopic arm, the rest of the arm-shrinking rope is arranged around the corresponding arm-shrinking pulley, one end of the first arm-shrinking rope is connected with the corresponding rope-arranging fixing seat, and the other end of the first arm-shrinking rope is connected with the lower section of telescopic arm of the telescopic arm installed by the corresponding arm-shrinking pulley.

Preferably, the rope row fixing seat is provided with a pin hole, the telescopic arm is provided with a pin seat, a bolt is slidably arranged on the pin seat, the bolt is connected with a driving structure, the bolt is driven by the driving structure to slide on the pin seat, and the bolt can be inserted into the pin hole to fix the rope row fixing seat.

Preferably, the driving structure adopts an electric push rod, a body of the electric push rod is fixed on the telescopic arm, and a telescopic rod of the electric push rod is connected with the bolt.

Preferably, two limit switches are integrated in the electric push rod, and the two limit switches are used for detecting the opening position and the closing position of the bolt.

The invention provides a telescopic method of the rope extension mechanism, when the first rope extension fixing seat is not fixed on the basic arm, the second telescopic arm extends out at the speed of the cylinder barrel when the cylinder barrel of the telescopic cylinder extends out, the first telescopic arm rope extends to follow, the third telescopic arm does not exert the telescopic arm pulling force, the third telescopic arm does not extend and retract relative to the second telescopic arm, and the telescopic arms of the following sections cannot obtain the telescopic arm pulling force, so that the telescopic mechanism is of a two-section telescopic structure.

Preferably, when the first rope row fixing seat is fixed on the basic arm, the second rope row fixing seat is not fixed on the second section of telescopic arm, when the cylinder barrel stretches out, the second section of telescopic arm stretches out at the speed of the cylinder barrel, the third section of telescopic arm stretches out at twice the speed of the cylinder barrel through the first rope row of telescopic arms, the second rope row of telescopic arms follows, no telescopic arm tension is applied to the fourth section of telescopic arm, the fourth section of telescopic arm does not stretch relative to the third section of telescopic arm, and all subsequent sections of telescopic arms cannot obtain the telescopic arm tension, so that the telescopic arm is of a three-section telescopic structure.

Preferably, when the first rope fixing seat is fixed on the basic arm, the second rope fixing seat is fixed on the second section of telescopic arm, when the third rope fixing seat is not fixed on the third section of telescopic arm, the second section of telescopic arm stretches out at the speed of the cylinder barrel when the cylinder barrel stretches out, the third section of telescopic arm stretches out at the speed twice as high as the cylinder barrel through the first rope row of telescopic arms, the fourth section of telescopic arm stretches out at the speed three times as high as the cylinder barrel through the second rope row of telescopic arms, the third rope row of telescopic arms follows, no telescopic arm tension is applied to the fifth section of telescopic arm, the fifth section of telescopic arm does not stretch relative to the fourth section of telescopic arm, and all subsequent sections of telescopic arms cannot obtain the telescopic arm tension, so that the telescopic arm is of a four-section telescopic structure.

The invention also provides a crane, which comprises a crane body and a controller, wherein the crane body is provided with the rope extension mechanism, the controller is electrically connected with the electric push rod by applying the extension method, and the controller is used for controlling extension and retraction of the electric push rod and feeding back the position information of the bolt.

Preferably, the lithium battery pack is electrically connected with the electric push rod and the controller, and the lithium battery pack is integrated with a solar panel, a charge capacity indicator lamp and a battery overcharge protection module.

Preferably, the remote controller sends a command of the moment limiter to the corresponding controller in an electromagnetic wave mode, and feeds back the position information of the bolt to the moment limiter.

Compared with the prior art, the invention has the following technical effects:

(1) According to the invention, the boom rope is fixed or loosened through the rope fixing seat, when the boom rope is in heavy load, whether a certain rope fixing seat is fixed with the telescopic boom or not can be selected according to the requirement, and when the boom rope is not fixed, the corresponding telescopic boom is not stressed, and does not stretch relative to the previous stage telescopic boom, so that heavy lifting can be realized, and the problems of smaller lifting weight and small application range of the existing rope type telescopic structure are solved;

(2) According to the invention, whether the corresponding arm extending rope rows are fixed or not can be controlled by controlling the fixing of the different rope row fixing seats, and when the corresponding arm extending rope rows are fixed, the corresponding telescopic arms are stressed and telescopic relative to the previous-stage telescopic arms, so that the quick telescopic operation can be realized according to the needs, and the telescopic efficiency of the telescopic arms is improved;

(3) The invention is provided with the moment limiter, the telescopic state of each telescopic arm is finally controlled by the moment limiter, and each electric push rod feeds back the position information to the moment limiter again, so that closed loop inspection is formed, corresponding to a corresponding operation limiting mode, and the safety problem caused by operator error is solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a diagram of a prior art rope arrangement;

FIG. 2 is a schematic illustration of the construction of the present invention;

FIG. 3 is a schematic view of a rope retractor mechanism of the present invention;

FIG. 4 is a schematic view of the rope fixing seat of the invention in a state of not fixing the arm extension rope;

FIG. 5 is a schematic view of the state of the rope fixing seat for fixing the arm extension rope of the invention;

FIG. 6 is an enlarged schematic view of the structure of FIG. 5A;

FIG. 7 is a schematic view of the telescopic arm of the rope retractor of the invention in an unextended state;

FIG. 8 is a schematic view of the second telescopic arm of FIG. 7 after extension;

FIG. 9 is a schematic view of the second and third telescoping arms of FIG. 7 after extension;

FIG. 10 is a schematic view of the second through fourth telescopic arms of FIG. 7 after extension;

FIG. 11 is a schematic view of the second through fifth telescoping arms of FIG. 7 after extension;

FIG. 12 is a schematic view of the second to final telescoping arm of FIG. 7 after extension;

FIG. 13 is a schematic view of a crane construction according to the present invention;

FIG. 14 is a flowchart of the operation of the automatic control system of the present invention;

FIG. 15 is a schematic view of an electric putter in accordance with the present invention;

fig. 16 is a schematic view of a lithium battery pack according to the present invention;

1, a rope extension mechanism; 2. an electric push rod; 3. a plug pin; 4. a controller; 5. a lithium battery pack; 6. a remote controller; 7. a torque limiter; 10. a telescoping arm; 16. a telescopic cylinder; 17. arm extension rope rows; 18. arm shrinking rope rows; 19. a rope fixing seat;

101. a base arm; 102. a second telescopic arm; 103. a third telescopic arm; 104. a fourth telescopic arm; 105. a fifth telescopic arm; 106. a penultimate telescopic arm; 107. a tail telescopic arm;

111. a first boom line; 112. a first boom sheave; 113. a first arm retraction pulley; 114. the first arm-shrinking rope row; 115. the first rope row fixing seat;

121. the second arm stretching rope row; 122. a second boom sheave; 123. a second arm retraction pulley; 124. the second arm-shrinking rope row; 125. the second rope row fixing seat;

131. a third arm extension rope row; 132. a third boom sheave; 133. a third arm retraction pulley; 134. a third arm-retracting rope row; 135. a third rope row fixing seat;

141. a fourth arm-extending rope row; 142. a fourth boom sheave; 143. a fourth arm retraction pulley; 144. fourth arm-shrinking rope row; 145. a fourth rope row fixing seat;

151. a fifth boom line; 152. a fifth boom sheave; 153. a fifth telescopic arm pulley; 154. fifth arm shrinking rope rows; 155. a fifth rope row fixing seat;

161. a cylinder rod; 162. a cylinder;

21. a first limit switch; 22. a second limit switch;

51. a solar panel; 52. a charging port; 53. and connecting wires.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The invention aims to provide a rope extension and retraction mechanism, a retraction method and a crane thereof, which are used for solving the problems in the prior art, and the rope extension and retraction mechanism can be used for fixing or loosening an arm extension rope row through a rope extension fixing seat, so that when a heavy load is carried out, whether a certain rope extension fixing seat is fixed with a telescopic arm or not can be selected according to the requirement, and when the rope extension rope row is not fixed, the corresponding telescopic arm is not stressed, and is not retracted relative to a previous stage telescopic arm, so that heavy lifting load can be realized, and the problems of small lifting load weight and small application range of the traditional rope extension and retraction structure are solved.

In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.

As shown in fig. 2 to 12, the present invention provides a rope extension mechanism 1, which comprises a basic arm 101, at least two telescopic arms 10 sleeved in the basic arm 101 in sequence, a structure (a basic arm 101, a second telescopic arm 102, a minor-last telescopic arm 106 and a final-last telescopic arm 107) comprising four telescopic arms 10 is shown in fig. 2, a structure (a basic arm 101, a second telescopic arm 102, a third telescopic arm 103, a fourth telescopic arm 104, a fifth telescopic arm 105, a minor-last telescopic arm 106 and a final-last telescopic arm 107) comprising seven telescopic arms 10 is shown in fig. 3, and a telescopic cylinder 16, an arm extension pulley, an arm extension rope row 17, an arm extension rope row 18 and a rope row fixing seat 19 are further included.

The telescopic cylinder 16 includes a cylinder tube 162 and a cylinder rod 161, the cylinder tube 162 and the cylinder rod 161 can relatively move in a telescopic manner, and the telescopic cylinder 16 can take the form of a cylinder or an oil cylinder, etc., and takes compressed gas, hydraulic oil, etc. as a driving medium. The cylinder rod 161 is fixed to the base arm 101, the cylinder tube 162 is fixed to the second telescopic arm 102, and the axial direction of the telescopic cylinder 16 is the same as the telescopic direction of the telescopic arm 10, so that the second telescopic arm 102 can be directly driven to perform telescopic operation with respect to the base arm 101 when the telescopic cylinder 16 performs telescopic operation. One arm extending pulley is mounted on each of the cylinder 162 and the other telescopic arms 10 except the base arm 101, the second telescopic arm 102 and the final telescopic arm 107, specifically, the cylinder 162 is mounted with a first arm extending pulley 112, the third telescopic arm 103 is mounted with a second arm extending pulley 122, the fourth telescopic arm 104 is mounted with a third arm extending pulley 132, the fifth telescopic arm 105 is mounted with a fourth arm extending pulley 142, and the next final telescopic arm 106 is mounted with a fifth arm extending pulley 152. The telescopic arms 10 except the basic arm 101 and the final telescopic arm 107 are respectively provided with an arm retracting pulley, specifically, the second telescopic arm 102 is provided with a first arm retracting pulley 113, the third telescopic arm 103 is provided with a second arm retracting pulley 123, the fourth telescopic arm 104 is provided with a third arm retracting pulley 133, the fifth telescopic arm 105 is provided with a fourth arm retracting pulley 143, and the minor-end telescopic arm 106 is provided with a fifth arm retracting pulley 153. The telescopic arms 10 except the last telescopic arm 107 and the next telescopic arm 106 are correspondingly provided with a rope row fixing seat 19, the rope row fixing seat 19 is used for fixing the connecting ends of the connected arm extension rope row 17 and the arm retraction rope row 18, and the rope row fixing seat 19 can be clamped and fixed, spliced and fixed or clamped and fixed and the like. When the telescopic boom is arranged, the first rope row fixing seat 115 is arranged on the basic boom 101, the second rope row fixing seat 125 is arranged on the second telescopic boom 102, the third rope row fixing seat 135 is arranged on the third telescopic boom 103, the fourth rope row fixing seat 145 is arranged on the fourth telescopic boom 104, and the fifth rope row fixing seat 155 is arranged on the fifth telescopic boom 105.

The first arm extension rope 111 passes around the first arm extension pulley 112, one end of the first arm extension rope is connected with the first rope fixing seat 115, and the other end of the first arm extension rope is connected with the third telescopic arm 103. The other arm extension rope rows 17 bypass the corresponding arm extension pulleys, one ends of the arm extension rope rows are connected with the corresponding rope row fixing seats 19, and the other ends of the arm extension rope rows are connected with the lower section telescopic arms 10 of the telescopic arms 10 installed on the corresponding arm extension pulleys. Specifically, the second boom rope 121 bypasses the second boom pulley 122, one end is connected with the second rope fixing seat 125, and the other end is connected with the fourth telescopic boom 104; the third arm extension rope 131 bypasses the third arm extension pulley 132, one end of the third arm extension rope is connected with the third rope row fixing seat 135, and the other end of the third arm extension rope is connected with the fifth section of telescopic arm 105; the fourth arm extension rope 141 bypasses the fourth arm extension pulley 142, one end of the fourth arm extension rope 141 is connected with the fourth rope extension fixing seat 145, and the other end of the fourth arm extension rope 141 is connected with the minor-end telescopic boom 106; the fifth boom rope 151 passes around the fifth boom pulley 152, one end of which is connected with the fifth rope fixing seat 155, and the other end of which is connected with the final telescopic arm 107.

The first telescopic arm rope 114 bypasses the first telescopic arm pulley 113, one end of the first telescopic arm rope is connected with the first rope row fixing seat 115, and the other end of the first telescopic arm rope is connected with the third telescopic arm 103. The rest arm-retracting rope rows 18 bypass the corresponding arm-retracting pulleys, one ends of the arm-retracting rope rows are connected with the corresponding rope row fixing seats 19, and the other ends of the arm-retracting rope rows are connected with the lower section telescopic arms 10 of the telescopic arms 10 installed on the corresponding arm-retracting pulleys. Specifically, the second telescopic arm rope 124 bypasses the second telescopic arm pulley 123, one end of the second telescopic arm rope is connected with the second rope row fixing seat 125, and the other end of the second telescopic arm rope is connected with the fourth telescopic arm 104; the third telescopic arm rope 134 bypasses the third telescopic arm pulley 133, one end of the third telescopic arm rope is connected with the third rope row fixing seat 135, and the other end of the third telescopic arm rope is connected with the fifth telescopic arm 105; the fourth telescopic arm rope row 144 bypasses the fourth telescopic arm pulley 143, one end of the fourth telescopic arm rope row is connected with the fourth rope row fixing seat 145, and the other end of the fourth telescopic arm rope row is connected with the minor-end telescopic arm 106; the fifth telescopic arm rope 154 is wound around the fifth telescopic arm pulley 153, one end of the fifth telescopic arm rope is connected with the fifth rope row fixing seat 155, and the other end of the fifth telescopic arm is connected with the tail telescopic arm 107.

In order to better explain the technical effect which can be achieved by the invention, the prior rope type structure principle and the structure principle of the invention are introduced as follows:

as shown in fig. 1, the principle of the existing rope row structure is that assuming that the suspended load makes the axial force borne by the final telescopic arm 107 be F0, the force F1 of the second boom rope row 121 is equal to about F0, the force F2 of the next final telescopic arm 106 is equal to 2 times F1, F2 is equal to F4, F3 is equal to 2 times F4, and F3 is equal to 4 times F0. With the increase of the number of the sections of the telescopic boom 10, the stress of the rear telescopic boom is huge, so that the telescopic cylinder 16 and the boom rope row 17 are difficult to bear, the whole weight capable of being hoisted is smaller, and the problem of small application range is obvious.

As shown in fig. 2, the structural principle of the present invention is that the hanging object makes the axial force born by the final telescopic arm 107 be f0, the force f1 of the second boom rope row 121 is equal to about 0, the force f4 of the first boom rope row 111 is also equal to about 0, and thus f3 is equal to f0.

F3 and F3 are the thrust of telescopic cylinder 16, if telescopic cylinder 16 is the same, the maximum thrust provided is the same, the maximum weight that can be hoisted when having four telescopic arms 10, F0 is 4 times F0; with five telescopic arms 10, F0 is 8 times F0; with six telescopic arms 10, F0 is 16 times F0. Therefore, by using the rope extension mechanism 1 of the invention, when the rope extension mechanism is in heavy load, whether a certain rope extension fixing seat 19 is fixed with the telescopic arm 10 can be selected according to the requirement, and when the rope extension mechanism is not fixed, the corresponding telescopic arm 10 does not extend and retract relative to the previous stage telescopic arm 10, so that heavy lifting load can be realized, and the problems of small lifting load weight and small application range of the existing rope extension type telescopic structure are solved.

As shown in fig. 4 to 6, the rope row fixing seat 19 is provided with a pin seat, the telescopic arm 10 is provided with a pin 3 in a sliding manner, the pin 3 is connected with a driving structure, the pin 3 is driven to slide on the pin seat by the driving structure, the pin 3 can be inserted into the pin hole of the rope row fixing seat 19 to fix the rope row fixing seat 19, and then the arm extension rope row 17 is fixed by the rope row fixing seat 19.

The driving structure may adopt a structure form of a pneumatic cylinder, a cam structure, an electric push rod 2, etc. capable of realizing a reciprocating linear motion, preferably adopts the electric push rod 2, and the body of the electric push rod 2 is fixed on the telescopic arm 10. The electric push rod 2 is composed of a motor, a gear set, a screw rod and the like, the controller 4 enables the motor to rotate positively and negatively by providing current in different directions for the motor of the electric push rod 2, the motor drives the gear set and the screw rod to extend and retract the telescopic rod, and the telescopic rod is mechanically connected with the bolt 3.

Referring to fig. 15, two limit switches, namely a first limit switch 21 and a second limit switch 22, are integrated in the electric push rod 2, the first limit switch 21 is used for detecting the open position of the plug pin 3, and the second limit switch 22 is used for detecting the close position of the plug pin 3.

As shown in fig. 8, the present invention provides a method for expanding and contracting the rope extension mechanism 1 described above, in which when the first rope fixing base 115 is not fixed to the base arm 101, the second telescopic arm 102 is extended at the speed of the cylinder 162 when the cylinder 162 of the telescopic cylinder 16 is extended, the first rope 111 is moved, the third telescopic arm 103 is not subjected to the arm extension force, the third telescopic arm 103 is not expanded and contracted with respect to the second telescopic arm 102, and the subsequent telescopic arms 10 are not subjected to the arm extension force, and thus the second telescopic arm is constructed.

As shown in fig. 9, when the first rope fixing base 115 is fixed to the base arm 101, the second rope fixing base 125 is not fixed to the second telescopic arm 102, the second telescopic arm 102 is extended at the speed of the cylinder 162 when the cylinder 162 is extended, the third telescopic arm 103 is extended at the speed twice as high as the cylinder 162 through the first arm extension rope 111, the second arm extension rope 121 follows, no arm extension tension is applied to the fourth telescopic arm 104, the fourth telescopic arm 104 does not extend and retract relative to the third telescopic arm 103, and the following telescopic arms 10 cannot obtain arm extension tension, and at this time, are of a three-section telescopic structure.

As shown in fig. 10, when the first rope fixing base 115 is fixed to the base arm 101, the second rope fixing base 125 is fixed to the second telescopic arm 102, the third rope fixing base 135 is not fixed to the third telescopic arm 103, the second telescopic arm 102 is extended at the speed of the cylinder 162 when the cylinder 162 is extended, the third telescopic arm 103 is extended at the speed of twice the cylinder 162 through the first rope extension row 111, the fourth telescopic arm 104 is extended at the speed of three times the cylinder 162 through the second rope extension row 121, the third rope extension row 131 is driven, no arm extension tension is applied to the fifth telescopic arm 105, the fifth telescopic arm 105 does not extend and retract relative to the fourth telescopic arm 104, and the following telescopic arms 10 cannot obtain the arm extension tension, and are in this case of a four-section telescopic structure.

Similarly, as shown in fig. 11, when the first rope fixing base 115 is fixed to the base arm 101, the second rope fixing base 125 is fixed to the second telescopic arm 102, the third rope fixing base 135 is fixed to the third telescopic arm 103, the fourth rope fixing base 145 is not fixed to the fourth telescopic arm 104, and the cylinder 162 is extended to form a five-arm telescopic structure. When the first rope fixing seat 115 is fixed on the basic arm 101, the second rope fixing seat 125 is fixed on the second telescopic arm 102, the third rope fixing seat 135 is fixed on the third telescopic arm 103, the fourth rope fixing seat 145 is fixed on the fourth telescopic arm 104, the fifth rope fixing seat 155 is not fixed on the fifth telescopic arm 105, and the cylinder 162 extends out to form a six-arm telescopic structure. As shown in fig. 12, when the first rope fixing base 115 is fixed to the base arm 101, when the second rope fixing base 125 is fixed to the second telescopic arm 102, when the third rope fixing base 135 is fixed to the third telescopic arm 103, the fourth rope fixing base 145 is fixed to the fourth telescopic arm 104, and when the fifth rope fixing base 155 is fixed to the fifth telescopic arm 105, the cylinder 162 is extended, and the structure is a seven-arm telescopic structure.

As shown in fig. 13 to 16, the present invention further provides a crane, which comprises a car body and a controller 4, wherein the car body is provided with the rope extension and retraction mechanism 1 as described above, the rope extension and retraction mechanism 1 is extended and retracted by applying the extension and retraction method as described above, the controller 4 is electrically connected with the electric push rod 2, the extension and retraction of the electric push rod 2 is controlled by the controller 4, the electric push rod 2 is connected with the bolt 3, further, the fixed control of the rope fixing seat 19 is realized by the action of the electric push rod 2, and the controller 4 feeds back the position information of the bolt 3 through the extension and retraction state of the electric push rod 2 and the first limit switch 21 and the second limit switch 22.

As shown in fig. 16, the lithium battery pack 5 electrically connected with the electric putter 2 and the controller 4 is included, the power supply to the electric putter 2 and the controller 4 is realized by using the lithium battery pack 5 through a connection wire 53, the lithium battery pack 5 is integrated with a solar panel 51, a charge capacity indicator lamp and a battery overcharge protection module, and a charging port 52 is further provided, so that charging can be performed under the condition of insufficient illumination.

As shown in fig. 14, the remote control device comprises a remote controller 6 and a moment limiter 7, and the electric push rod 2, the plug pin 3, the controller 4, the lithium battery pack 5 and the other telescopic arms 10 except for the last telescopic arm 107 and the next-last telescopic arm 106 are sequentially arranged. The remote control 6 and the moment limiter 7 are installed in the operation room. The remote controller 6 is connected with the controller 4 in a wireless way, and the remote controller 6 can send a command of the moment limiter 7 to the corresponding controller 4 in an electromagnetic wave mode and feed back the position information of the bolt 3 to the moment limiter 7. The moment limiter 7 is used for limiting the crane not to exceed rated design moment, and can be composed of a display, a singlechip calculation control box, an angle sensor, a length sensor, a pressure (pull) sensor and the like. In practical application, because the moment limiter 7 is provided with the single-chip microcomputer calculation control box and the display, a program for controlling the telescopic arm 10 can be written in the moment limiter 7, an operator selects an arm section to be telescopic through a touch screen of the moment limiter 7, the moment limiter 7 controls a relevant I/O port to output a signal to the remote controller 6 according to the written program, and a required telescopic arm section command is issued according to the requirement of the operator, and a lifting performance control program matched with the telescopic arm section command is called. The moment limiter 7 can preset a plurality of arm extending mode options, an operator selects preset working conditions, the control system can automatically perform comprehensive calculation, and the electric push rod 2 drives the bolt 3 to control the working state and the non-working state of the rope extension telescopic mechanism 1, so that an optimal combination mode of telescopic joint arms is realized. The mode can give consideration to efficiency and strength, and solves the problems of small lifting weight and small application range of the rope-type telescopic boom crane.

The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.

Claims (10)

1. The utility model provides a rope arranges telescopic machanism which characterized in that: the telescopic arm comprises a basic arm, at least two sections of telescopic arms, a telescopic cylinder, an arm extending pulley, an arm extending rope row, an arm retracting pulley, an arm retracting rope row and a rope row fixing seat which are sequentially sleeved in the basic arm;

the cylinder rod of the telescopic cylinder is fixed on the basic arm, and the cylinder barrel of the telescopic cylinder is fixed on the second section of telescopic arm; the cylinder barrel and the telescopic arms except the basic arm, the second telescopic arm and the last telescopic arm are respectively provided with an arm extending pulley; the telescopic arms except the basic arm and the tail telescopic arm are respectively provided with one telescopic arm pulley; the rope row fixing seats are correspondingly arranged on the telescopic arms except the tail telescopic arm and the minor tail telescopic arm and are used for fixing the connecting ends of the connected arm extension rope row and the arm retraction rope row;

the first arm extending rope is wound around the first arm extending pulley, one end of the first arm extending rope is connected with the first rope row fixing seat, the other end of the first arm extending rope is connected with the third section of telescopic arm, the rest of the arm extending rope rows are wound around the corresponding arm extending pulleys, one end of the first arm extending rope is connected with the corresponding rope row fixing seat, and the other end of the first arm extending rope is connected with the lower section of telescopic arm of the telescopic arm installed on the corresponding arm extending pulley;

the first arm-shrinking rope is arranged around the first arm-shrinking pulley, one end of the first arm-shrinking rope is connected with the first rope-arranging fixing seat, the other end of the first arm-shrinking rope is connected with the third section of telescopic arm, the rest of the arm-shrinking rope is arranged around the corresponding arm-shrinking pulley, one end of the first arm-shrinking rope is connected with the corresponding rope-arranging fixing seat, and the other end of the first arm-shrinking rope is connected with the lower section of telescopic arm of the telescopic arm installed by the corresponding arm-shrinking pulley.

2. The rope extension mechanism of claim 1, wherein: the rope row fixing seat is provided with a pin hole, the telescopic arm is provided with a pin seat, a bolt is arranged on the pin seat in a sliding mode, the bolt is connected with a driving structure, the bolt is driven by the driving structure to slide on the pin seat, and the bolt can be inserted into the pin hole to fix the rope row fixing seat.

3. The rope extension mechanism of claim 2, wherein: the driving structure adopts an electric push rod, the body of the electric push rod is fixed on the telescopic arm, and the telescopic rod of the electric push rod is connected with the bolt.

4. A rope extension mechanism according to claim 3, wherein: and two limit switches are integrated in the electric push rod and are used for detecting the opening position and the closing position of the bolt.

5. A method of retracting a rope retractor mechanism according to any one of claims 1 to 4 wherein: when the first rope row fixing seat is not fixed on the basic arm, the second section of telescopic arm stretches out at the speed of the cylinder barrel when the cylinder barrel of the telescopic cylinder stretches out, the first arm stretching rope row follows, no arm stretching tension is applied to the third section of telescopic arm, the third section of telescopic arm does not stretch relative to the second section of telescopic arm, and all subsequent sections of telescopic arms cannot obtain the arm stretching tension, so that the telescopic arm is of a two-section telescopic structure.

6. The telescoping method as recited in claim 5, wherein: when the first rope row fixing seat is fixed on the basic arm, the second rope row fixing seat is not fixed on the second section of telescopic arm, when the cylinder barrel stretches out, the second section of telescopic arm stretches out at the speed of the cylinder barrel, the third section of telescopic arm stretches out at twice the speed of the cylinder barrel through the first rope row of telescopic arms, the second rope row of telescopic arms follows, no stretching arm pulling force is applied to the fourth section of telescopic arm, the fourth section of telescopic arm does not stretch relative to the third section of telescopic arm, and all subsequent sections of telescopic arms cannot obtain the stretching arm pulling force, so that the telescopic arm is of a three-section telescopic structure.

7. The telescoping method as recited in claim 6, wherein: when the first rope row fixing seat is fixed on the basic arm, when the second rope row fixing seat is fixed on the second section of telescopic arm, when the third rope row fixing seat is not fixed on the third section of telescopic arm, when the cylinder barrel stretches out, the second section of telescopic arm stretches out at the speed of the cylinder barrel, the third section of telescopic arm stretches out at the speed of the cylinder barrel by the first arm stretching rope row, the fourth section of telescopic arm stretches out at the speed of the cylinder barrel by the second arm stretching rope row, the third arm stretching rope row follows, the arm stretching pulling force is not applied to the fifth section of telescopic arm, the fifth section of telescopic arm does not stretch out and draw back relative to the fourth section of telescopic arm, and the following sections of telescopic arm cannot obtain the arm stretching force, so that the telescopic arm is of a four-section telescopic structure.

8. A crane, characterized in that: the telescopic mechanism comprises a vehicle body and a controller, wherein the rope telescopic mechanism is installed on the vehicle body, the controller is electrically connected with the electric push rod by applying the telescopic method according to any one of claims 5-7, and the controller is used for controlling the electric push rod to stretch and retract and feeding back the position information of the bolt.

9. The crane of claim 8, wherein: the lithium battery pack is electrically connected with the electric push rod and the controller, and the lithium battery pack is integrated with a solar panel, a charge capacity indicator lamp and a battery overcharge protection module.

10. Crane according to claim 9, characterized in that: the remote controller sends a command of the moment limiter to the corresponding controller in an electromagnetic wave mode, and the position information of the bolt is fed back to the moment limiter.