Cylinder pulley winch

Abstract

The cylinder pulley winch includes a boom assembly, a winch body is installed inside the boom assembly, and a driving cylinder is installed outside the boom; the winch body includes a first mounting plate, a telescopic cylinder, a second mounting plate and two sets of pulley mechanisms, the first mounting plate is connected to one end of the telescopic cylinder, the second mounting plate is connected to the other end of the telescopic cylinder, the first mounting plate is fixed to the boom assembly, and the two sets of pulley mechanisms are symmetrically arranged on the left and right sides of the winch body. The positive effect of the present invention is that it has the advantage of avoiding overweight lifting, because its lifting power is provided by the hydraulic system, therefore, when lifting goods of unknown weight, even if the weight of the goods exceeds the load capacity of the hydraulic system, the hydraulic system will automatically release pressure and discharge oil, and the electric winch motor will not be burned out when the crane is overloaded.

Description

Technical Field

[0001] The invention relates to the technical field of cranes, in particular to an oil cylinder pulley winch. Background Art

[0002] The winches equipped on various existing cranes are mostly composed of drums, wire ropes, motors, brake mechanisms, reducers, and rope guides. They have a complex structure, all parts are concentrated together, and are large in size and occupy a large space, making them difficult to install on small and medium-sized cranes. Moreover, they use electromagnetic brakes or locking brakes, which are prone to brake pad wear that affects the braking effect and endangers the lives of on-site workers. Summary of the invention

[0003] To solve the above problems, the purpose of the present invention is to provide a cylinder pulley winch, which omits the drum, motor, reducer, brake mechanism and rope arranger and other mechanisms, has a simple structure, small size, and easy maintenance, and can solve the problems existing in the prior art.

[0004] The technical solution adopted by the present invention to solve the technical problem is as follows: the cylinder pulley winch described in the present invention comprises a boom assembly, a winch body is installed inside the boom assembly, and a driving cylinder is installed outside the boom; the winch body comprises a first mounting plate, a telescopic cylinder, a second mounting plate and two sets of pulley block mechanisms, the first mounting plate is connected to one end of the telescopic cylinder, the second mounting plate is connected to the other end of the telescopic cylinder, the first mounting plate is fixed to the boom assembly, and the two sets of pulley block mechanisms are symmetrically arranged on the left and right sides of the winch body;

[0005] Each pulley assembly mechanism includes a first front wheel assembly and a first rear wheel assembly, the first front wheel assembly is installed on one side of the second mounting plate, and the first rear wheel assembly is installed on one side of the first mounting plate, the first rear wheel assembly has one more wheel than the first front wheel assembly, a wire rope is wound between the first rear wheel assembly and the first front wheel assembly, and the distribution pattern of the wire rope between the first rear wheel assembly and the first front wheel assembly is as follows: the free end of the wire rope first bypasses the first wheel of the first rear wheel assembly, then bypasses the first wheel of the first front wheel assembly forward, then bypasses the second wheel of the first rear wheel assembly backward, then bypasses the second wheel of the first front wheel assembly forward, and then bypasses the third wheel of the first rear wheel assembly backward, and the winding is repeated in this way. Finally, the free end of the wire rope successively bypasses the last wheel of the first front wheel assembly and the last wheel of the first rear wheel assembly, and then extends out from the front end of the boom assembly; the first wheel of the first front wheel assembly and the first rear wheel assembly are both the innermost wheels, and the last wheel is both the outermost wheel, and the wheels in the same group are arranged in sequence from the first wheel to the last wheel;

[0006] There are one or two steel wire ropes. If there is one steel wire rope, the middle part of the steel wire rope is fixed to the second mounting plate by a fastening device, and its two free ends are respectively wound in two groups of pulley block mechanisms according to the above-mentioned steel wire rope distribution law, and finally the two free ends extend out from the front end of the boom assembly; if there are two steel wire ropes, the fixed end of each steel wire rope is fixed to one side of the second mounting plate by a fastening device, and its free end is wound in a corresponding group of pulley block mechanisms according to the above-mentioned steel wire rope distribution law, and finally extends out from the front end of the boom assembly.

[0007] The arrangement direction of the steel wire rope between the wheels of the first rear wheel group is from the innermost wheel to the outermost wheel; the arrangement direction of the steel wire rope between the wheels of the first front wheel group is from the innermost wheel to the outermost wheel, and the free end of the steel wire rope finally passes around the outermost wheel of the first rear wheel group and extends forward outside the boom assembly.

[0008] Each group of pulley mechanisms further includes a second rear wheel group and a second front wheel group, the second rear wheel group is mounted on the first mounting plate, the second front wheel group is mounted on the second mounting plate, the second rear wheel group and the second front wheel group are located between the first rear wheel group and the first front wheel group; the diameter of the second rear wheel group is smaller than the diameter of the first rear wheel group, the diameter of the second front wheel group is smaller than the diameter of the first front wheel group; the second rear wheel group and the second front wheel group have the same number of wheels;

[0009] The distribution pattern of the wire rope is two winding stages of the first wheel group and the second wheel group. In the first winding stage: the free end of the wire rope first bypasses the first wheel of the second rear wheel group, then bypasses the first wheel of the second front wheel group forward, and then bypasses the second wheel of the second rear wheel group backward, then bypasses the second wheel of the second front wheel group forward, and then bypasses the third wheel of the second rear wheel group backward, and so on. The winding is cyclical. After bypassing the last wheel of the second front wheel group, the free end of the wire rope goes backward to the first wheel of the first rear wheel group, and the second winding stage begins. The distribution pattern of the second winding stage is the same as the distribution pattern of the wire rope between the first rear wheel group and the first front wheel group. Finally, after the wire rope bypasses the last wheel of the first rear wheel group, its free end extends from the front end of the boom assembly; the first wheel of the second rear wheel group and the second front wheel group are both the outermost wheels, and the last wheel is both the innermost wheel, and the first wheel and the last wheel of the same group are arranged in sequence.

[0010] The distribution of the wire rope on each wheel of the second rear wheel group and the second front wheel group is arranged from the outermost to the innermost, and the distribution of the wire rope on each wheel of the first rear wheel group and the first front wheel group is arranged in sequence from the innermost wheel to the outermost wheel, and the free end of the wire rope finally extends forward from the outermost wheel of the first rear wheel group outside the boom assembly.

[0011] The fastening device comprises a rope rack, a rope pressing block, an inclined iron and a fastening bolt. A mounting groove matched with the fastening device is also provided at the bottom of the second mounting plate, wherein one end of the mounting groove is a first inclined surface matched with the inclined iron, and the inclined iron is connected to the second mounting plate through the fastening bolt; the rope rack is fixedly installed at the other end of the mounting groove, and a rope pressing block is provided between the rope rack and the inclined iron;

[0012] The rope rack is respectively provided with first through holes matching with the steel wire rope on both sides, and a protrusion is provided at the middle position of the rope rack near one end of the rope pressing block, and a second through hole matching with the steel wire rope is provided on the protrusion, and the second through hole is vertically arranged to the first through hole, and there is a circular arc transition section between the second through hole and the first through hole, and the middle position of the steel wire rope is located in the protrusion; the rope pressing block is provided with a pressing groove matching with the second through hole at one end close to the rope rack, and a groove matching with the protrusion is provided in the middle of the pressing groove, and a second inclined surface matching with the inclined iron is provided at one end of the rope pressing block close to the inclined iron, and the inclined iron can push the rope pressing block to press the rope rack while moving toward the inside of the installation groove, so that the pressing groove on the rope pressing block presses the steel wire rope tightly and fixes it in the second through hole.

[0013] The fastening means is a wedge joint.

[0014] The boom assembly includes a first boom, a second boom that can move along the first boom is installed in cooperation with the first boom, a limiting plate is installed on the upper end of the second boom that extends out of the first boom, and a driving cylinder is hingedly installed between the limiting plate and the first boom; a third boom that can move along the second boom is installed in cooperation with the second boom, and a fourth boom that can move along the third boom is installed in cooperation with the third boom, wherein a first follower device is installed between the second boom and the third boom, the first follower device includes a first pulley fixedly installed in the second boom, a first transmission rope is wound around the first pulley, one end of the first transmission rope is fixedly installed on the first boom, and the other end of the first transmission rope is fixedly installed on the third boom; a second follower device is installed between the third boom and the fourth boom, the second follower device includes a second pulley fixedly installed in the third boom, a second transmission rope is wound around the second pulley, one end of the second transmission rope is fixedly installed on the second boom, and the other end of the second transmission rope is fixedly installed on the fourth boom.

[0015] The rotating shaft of the first rear wheel assembly is hingedly mounted on the boom assembly, a mounting hole matching the rotating shaft is provided on the side wall at the rear end of the boom assembly, and two sets of locking and positioning devices are provided between the telescopic cylinder and the boom assembly;

[0016] Each set of locking and positioning devices includes a cylinder positioning block fixedly mounted on the telescopic cylinder. A reinforcement plate is provided on the boom assembly corresponding to the position of the cylinder positioning block. The inner thread of the reinforcement plate is matched with a pressure block. The pressure block can be rotated to press the cylinder positioning block. A light hole is provided in the pressure block. A bolt is installed in the light hole. A screw hole matching the bolt is provided on the cylinder positioning block. A pressure plate is provided between the end of the bolt and the reinforcement plate. The bolt can be rotated into the cylinder positioning block to fix the telescopic cylinder to the boom assembly.

[0017] A folding arm is also fixedly installed at the front end of the boom assembly, and a first fixed pulley and a second fixed pulley are provided on both sides of the folding arm. The wire rope extending from the inside of the winch body passes around the first fixed pulley and the second fixed pulley and is connected to the hook. The folding arm can be installed at the front end of the fourth boom, which is the frontmost position of the boom assembly.

[0018] The positive effect of the present invention is that the main components of the oil cylinder pulley winch are distributed along the length direction, and its overall shape is slender, which is convenient to be installed inside the boom, and does not occupy additional space outside the boom, so that there is enough space on the crane body to hold the hoisted goods, so that the crane has the dual functions of hoisting and transportation, and is particularly suitable for small and medium-sized cranes. It uses a hydraulic system to achieve braking, does not require a separate braking mechanism, can fundamentally solve the problem that the brake pad is easy to wear and needs to be replaced frequently during use, and can also greatly improve the safety of hoisting operations. Its main components are hydraulic cylinders and pulley blocks, which have a simple structure, low processing and manufacturing costs, and a long service life. It has the advantage of avoiding overweight lifting. Since its lifting power is provided by the hydraulic system, when lifting goods of unknown weight, even if the weight of the goods exceeds the load capacity of the hydraulic system, the hydraulic system will automatically release pressure and discharge oil, and there will be no situation where the motor of the electric winch is burned when the crane is overloaded.

[0019] In addition, the driven device installed between the multi-stage booms can ensure that all the booms are fully extended under the drive of a driving cylinder, simplifying the structural setting of the boom. Both sides of the winch inside the boom are equipped with multi-stage wheel sets, on which wire ropes are wound back and forth. Under the premise of the same extension and retraction stroke of the winch cylinder, the wire rope can be controlled to be extended and retracted for a longer distance, thereby greatly improving the application range of the overall device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the installation schematic diagram of the present invention;

[0021] Figure 2 It is a structural diagram of the first scheme of the winch;

[0022] Figure 3 yes Figure 2 A partial enlarged view of the middle VI;

[0023] Figure 4 yes Figure 2 A partial enlarged view of the middle V;

[0024] Figure 5 It is a schematic diagram of the internal section of the boom assembly;

[0025] Figure 6 yes Figure 5 An enlarged view of the BB section view;

[0026] Figure 7 It is a structural schematic diagram of another cut-away method inside the boom assembly;

[0027] Figure 8 This is a schematic diagram of the structure of the second winch scheme. In order to see the distribution of the pulleys clearly, some wire ropes are omitted in the figure;

[0028] Fig. 9 yes Figure 8 A partial enlarged view of middle II;

[0029] Fig.10 Figure 8 A partial enlarged view of middle III;

[0030] Fig.11 It is a structural schematic diagram of a locking and positioning device;

[0031] Fig.12 is a schematic diagram of the three-dimensional structure of the fastening device;

[0032] Fig.13 It is a structural diagram of the rope rack;

[0033] Fig.14 It is a schematic diagram of the structure where the same wire rope is installed on the third pulley;

[0034] Fig.15 It is a schematic diagram of the distribution of steel wire ropes in a pulley assembly mechanism including only a first front wheel assembly (431) and a first rear wheel assembly (411);

[0035] Fig.16 The present invention is a schematic diagram of the distribution of steel wire ropes of a pulley assembly mechanism including a first front wheel assembly (431), a first rear wheel assembly (411), a second rear wheel assembly (412) and a second front wheel assembly (432);

[0036] Fig.17 yes Fig.16 A partial enlarged view of I in the figure, in which the steel wire rope between the first wheel group is omitted in order to clearly highlight the winding method between the second wheel group;

[0037] Fig.18 This is a schematic diagram of the winding of the wire rope on the winch, where Fig.18As shown in B, the pulley assembly mechanism only includes a first front wheel assembly (431) and a first rear wheel assembly (411); Fig.18 As shown in A, the wheel set mechanism includes a first front wheel set (431), a first rear wheel set (411), a second rear wheel set (412) and a second front wheel set (432);

[0038] Fig.19 It is a structural diagram of the coordinated installation of the rope rack, the rope pressing block and the inclined iron;

[0039] Fig. 20 It is a schematic diagram of the structure of the inclined iron;

[0040] Fig.21 It is a structural schematic diagram of the rope pressing block.

[0041] In the figure, 1 vehicle body 2 lifting cylinder 3 arm assembly 31 first arm 32 second arm 33 third arm 34 fourth arm 35 driving cylinder 36 limit plate 321 first pulley 322 first transmission rope 331 second pulley 332 second transmission rope

[0042] 4 winch body 41 first mounting plate 42 telescopic oil cylinder 43 second mounting plate 44 folding arm 45 second fixed pulley 46 wire rope 47 first fixed pulley 431 first front wheel group 411 first rear wheel group 432 second front wheel group 412 second rear wheel group

[0043] 61 rope rack 62 rope pressing block 63 inclined iron 64 fastening bolt 65 mounting groove 66 first inclined surface 67 third pulley 611 first through hole 612 protrusion 613 second through hole 614 arc transition section 621 pressing groove 622 second inclined surface 623 groove

[0044] 71 oil cylinder positioning block 72 reinforcement plate 73 pressure block 74 bolt 75 pressure plate DETAILED DESCRIPTION

[0045] like Figure 5 As shown in FIG. 1 , the cylinder pulley winch of the present invention comprises a boom assembly 3. A winch body 4 is installed inside the boom assembly 3. A driving cylinder 35 is installed outside the boom, and the driving cylinder 35 provides power for the boom extension. The two ends of the driving cylinder 35 are respectively hinged to two different booms of the boom assembly 3. When the present invention is in use, Figure 1 As shown, the boom assembly 3 is hingedly mounted on the vehicle body 1, and a lifting cylinder 2 is installed between the vehicle body 1 and the boom assembly 3. The lifting cylinder 2 can drive the boom assembly 3 to move up and down to complete the lifting of the goods.

[0046] like Figure 8As shown, the winch body 4 includes a first mounting plate 41, a telescopic oil cylinder 42, a second mounting plate 43 and two pulley block mechanisms. The first mounting plate 41 is connected to the cylinder body of the telescopic oil cylinder 42, and the second mounting plate 43 is connected to the piston rod of the telescopic oil cylinder 42. The first mounting plate 41 can be directly fixed to the boom assembly 3 by bolts.

[0047] The two pulley block mechanisms are symmetrically arranged on the left and right sides of the winch body 4. Each pulley block mechanism includes a first front wheel group 431 and a first rear wheel group 411. Fig.10 As shown, the first front wheel set 431 is installed on one side of the second mounting plate 43. Fig. 9 As shown, a first rear wheel set 411 is installed on one side of the first mounting plate 41. The number of wheels of the first rear wheel set 411 is one more than that of the first front wheel set 431.

[0048] like Fig.18 As shown, a steel wire rope 46 is wound between the first rear wheel group 411 and the first front wheel group 431, and the distribution pattern of the steel wire rope 46 between the first rear wheel group 411 and the first front wheel group 431 is as follows: the free end of the steel wire rope 46 first bypasses the first wheel of the first rear wheel group 411, then bypasses the first wheel of the first front wheel group 431 forward, then bypasses the second wheel of the first rear wheel group 411 backward, then bypasses the second wheel of the first front wheel group 431 forward, and then bypasses the third wheel of the first rear wheel group 411 backward, and the winding cycle is repeated. Finally, after bypassing the last wheel of the first rear wheel group 411, the free end of the steel wire rope 46 extends out from the front end of the boom assembly 3. The arrangement direction of the steel wire rope 46 between the wheels of the first rear wheel group 411 is from the innermost wheel to the outermost wheel; the arrangement direction of the steel wire rope 46 between the wheels of the first front wheel group 431 is from the innermost wheel to the outermost wheel, and the free end of the steel wire rope 46 finally passes around the outermost wheel of the first rear wheel group 411 and extends forward outside the boom assembly 3.

[0049] The wire rope distribution example of the pulley block mechanism including only the first front wheel group 431 and the first rear wheel group 411 is as follows: Fig.15 As shown, the first rear wheel group 411 is composed of three pulleys, B1, B2 and B3, and the first front wheel group 431 is composed of two pulleys, F1 and F2, and the distribution pattern of the wire ropes is as follows: the free end of the wire rope 46 extends backward from 43, first bypasses the innermost B1, then bypasses the innermost F1, then bypasses B2, then bypasses F2, and finally bypasses B3, and after bypassing B3, extends forward outside the boom 3.

[0050] The steel wire rope 46 may be one or two. If there is one steel wire rope 46, the middle part of the steel wire rope 46 is fixed to the second mounting plate 43 by a fastening device, and the two free ends are respectively wound in two sets of pulley block mechanisms according to the above-mentioned steel wire rope distribution law, and finally the two free ends extend from the front end of the boom assembly 3. Specifically, in the case of two steel wire ropes 46, the two fixed ends thereof can be respectively connected to the second mounting plate 43 by a wedge joint. If there are two steel wire ropes 46, the fixed end of each steel wire rope 46 is respectively fixed to one side of the second mounting plate 43 by a fastening device, and the free end thereof is wound in a corresponding set of pulley block mechanisms, and finally extends from the front end of the boom assembly 3.

[0051] like Fig.15 As shown, in the axial direction, the steel wire rope 46 is arranged in sequence from the innermost wheel to the outermost wheel of the first rear wheel group 411 and the first front wheel group 431, and the free end of the steel wire rope 46 finally extends forward from the outermost wheel of the first rear wheel group 411 to the outside of the boom assembly 3.

[0052] In order to further increase the telescopic length of the control wire rope 46 and reduce the overall width of the boom assembly 3 while keeping the maximum telescopic length of the telescopic cylinder 42 unchanged, as shown in FIG. Fig.18 As shown in A, each group of pulley mechanisms further includes a second rear wheel group 412 and a second front wheel group 432. Fig. 9 As shown, the second rear wheel set 412 is installed on the first mounting plate 41. Fig.10 As shown, the second front wheel set 432 is installed on the second mounting plate 43. The second rear wheel set 412 and the second front wheel set 432 are located between the first rear wheel set 411 and the first front wheel set 431. The diameter of the second rear wheel set 412 is smaller than the diameter of the first rear wheel set 411, and the diameter of the second front wheel set 432 is smaller than the diameter of the first front wheel set 431.

[0053] When the pulley assembly mechanism is composed of the first front wheel group 431, the first rear wheel group 411, the second rear wheel group 412 and the second front wheel group 432, the distribution pattern of the wire rope 46 is divided into two winding stages of the first wheel group and the second wheel group. The first winding stage: the free end of the wire rope 46 first passes around the first wheel of the second rear wheel group 412, then passes forward around the first wheel of the second front wheel group 432, then passes backward around the second wheel of the second rear wheel group 412, then passes forward around the second wheel of the second front wheel group 432, and then passes backward around the third wheel of the second rear wheel group 412, and the winding cycle is repeated. After passing around the last wheel of the second front wheel group 432, the free end of the wire rope 46 moves backward to the first wheel of the first rear wheel group 411, and the second winding stage begins. The distribution pattern of the second winding stage is the same as the distribution pattern of the wire rope 46 between the first rear wheel group 411 and the first front wheel group 431. Finally, after the wire rope 46 passes around the last wheel of the first rear wheel group 411, its free end extends out from the front end of the boom assembly 3.

[0054] The first wheels of the second rear wheel group 412 and the second front wheel group 432 are both the outermost wheels, and the last wheels are both the innermost wheels. The first wheel and the last wheel of the same group are arranged in sequence.

[0055] The distribution of the wire rope 46 on each wheel of the second rear wheel group 412 and the second front wheel group 432 is arranged from the outermost to the innermost, and the distribution of the wire rope 46 on each wheel of the first rear wheel group 411 and the first front wheel group 431 is arranged in sequence from the innermost wheel to the outermost wheel, and the free end of the wire rope 46 finally extends forward from the outermost wheel of the first rear wheel group 411 to the outside of the boom assembly 3.

[0056] When the pulley assembly mechanism includes a first front wheel assembly 431, a first rear wheel assembly 411, a second rear wheel assembly 412, and a second front wheel assembly 432, the wire rope distribution example is as follows: Fig.16 As shown, the first rear wheel group 411 is composed of three pulleys B1, B2 and B3, the first front wheel group 431 is composed of two pulleys F1 and F2, the second rear wheel group 412 is composed of two pulleys b1 and b2, and the second front wheel group 432 is composed of two pulleys f1 and f2.

[0057] The wire rope distribution law is divided into the first winding stage and the second winding stage:

[0058] First winding stage: the free end of the steel wire rope 46 extends backward from the second mounting plate 43, first around the outermost b1, then around the outermost f1, then around b2, then around f2 and extending toward B1.

[0059] The second winding stage: the wire rope from f2 first goes around the innermost B1, then around the innermost F1, then around B2, then around F2, and finally around B3, and after going around B3, it extends forward outside the boom 3.

[0060] hair Fig. 9 and Fig.10 As shown, corresponding to the position of the wheel group, a guard frame 8 is provided on the mounting plate to prevent the wire rope 46 from falling off. The number of wheels of the first front wheel group 431 is at least one, and the number of wheels of the first rear wheel group 411 is at least two. Fig. 9 and 10 As shown, the first front wheel group 431 has three wheels, the first rear wheel group 411 has four wheels, and the ratio of the moving distance of the telescopic cylinder 42 to the telescopic distance of the wire rope 46 is related to the number of wheels. When the moving distance of the telescopic cylinder 42 is the same, the more wheels there are, the longer the telescopic distance of the wire rope 46. The arrangement of the winch body 4 inside the boom assembly 3 can minimize the telescopic distance of the telescopic cylinder 42 while ensuring that the telescopic length of the wire rope 46 is sufficient, and can also reduce the length setting of the entire boom assembly 3.

[0061] In order to accurately install the hoist body 4 in the boom assembly 3 and avoid shaking when lifting goods, Fig.11 As shown, the rotating shaft of the first rear wheel assembly 411 is hingedly mounted on the boom assembly 3, and a mounting hole matching the rotating shaft is provided on the side wall of the boom assembly 3. Two sets of locking and positioning devices are also provided between the telescopic oil cylinder 42 and the boom assembly 3. Each set of locking and positioning devices includes a cylinder positioning block 71 fixedly mounted on the telescopic oil cylinder 42, and a reinforcing plate 72 is provided on the boom assembly 3 corresponding to the position of the cylinder positioning block 71. The reinforcing plate 72 is provided with a pressing block 73 in the inner thread, and the pressing block 73 can be rotated to press the cylinder positioning block 71. A light hole is provided in the pressing block 73, and a bolt 74 is installed in the light hole. A screw hole matching the bolt 74 is provided on the cylinder positioning block 71, and a pressing plate 75 is provided between the end of the bolt 74 and the reinforcing plate 72. The bolt 74 can be rotated into the cylinder positioning block 71 to fix the telescopic oil cylinder 42 to the boom assembly 3.

[0062] During installation, first extend the winch body 4 into the boom assembly 3, so that the rotating shaft of the first rear wheel group 411 is hinged on the first boom 31 of the boom assembly 3, and then screw the pressure blocks 73 into the reinforcement plates 72 on both sides of the boom assembly 3, so that the pressure blocks 73 on both sides press the cylinder positioning block 71, and adjust the positions of the pressure blocks 73 on both sides so that the telescopic cylinder 42 is located in the middle position of the boom assembly 3. At this time, one person is required to adjust at the back and one person is required to check whether it has been adjusted at the front. After the adjustment is completed, screw the bolt 74 into the light hole of the pressure block 73 and the screw hole of the cylinder positioning block 71 to position the pressure block 73 and complete the fixation between the telescopic cylinder 42 and the boom assembly 3. The overall installation operation is easy to implement and the positioning is accurate, which can ensure that the overall winch body 4 will not shake when lifting goods. The top of the pressure block 73 is provided with an inner hexagon to facilitate manual screwing of the pressure block 73 into the reinforcement plate 72.

[0063] In order to ensure that the steel wire rope 46 wound on each wheel group does not affect each other, the wheel diameters of the second front wheel group 432 and the second rear wheel group 412 are smaller than the wheel diameters of the first front wheel group 431 and the first rear wheel group 411. A second front wheel group 432 and a second rear wheel group 412 with the same number of wheels as the first front wheel group 431 are added. Under the premise that the telescopic cylinder 42 moves the same distance, the telescopic distance of the steel wire rope 46 is doubled. Fig.18As shown, the steel wire rope 46 is wound around the second rear wheel group 412, the second front wheel group 432, the first rear wheel group 411 and the first front wheel group 431 in sequence, and then wound back to the first rear wheel group 411, and then extended out of the boom assembly 3 to pass through the first fixed pulley 47 and the second fixed pulley 45, and then connected to the hook 5. The steel wire rope 46 is first wound between the second rear wheel group 412 and the second front wheel group 432, and then wound around the first wheel group after winding the number of wheels on the second wheel group. The winding sequence between the second rear wheel group 412 and the second front wheel group 432 is from the outside to the inside, and the winding sequence between the first front wheel group 431 and the first rear wheel group 411 is from the inside to the outside, so that the steel wire rope 46 wound out of the first rear wheel group 411 can be extended out of the boom assembly 3 from the outside of the wheel group, so as to avoid the occurrence of entanglement and obstruction between each section of the steel wire rope 46. When there are only the first front wheel group 431 and the first rear wheel group 411 on the winch body 4, the winding order of the wire rope 46 on the first front wheel group 431 and the first rear wheel group 411 is from inside to outside, so that the wire rope 46 wound by the first rear wheel group 411 extends out of the boom assembly 3 from the outside of the wheel group.

[0064] To facilitate manufacturing and installation, the steel wire rope 46 of the pulley block mechanisms on both sides is one, and the middle part of the steel wire rope 46 is fixed to the bottom of the second mounting plate 43 by a fastening device. The two sections of the steel wire rope 46 located at the pulley block mechanisms on both sides are equal in length and are both connected to the hook 5.

[0065] like Fig.12 As shown, the fastening device includes a rope rack 61, a rope pressing block 62, an inclined iron 63 and a fastening bolt 64. A mounting groove 65 matching the fastening device is also provided at the bottom of the second mounting plate 43, wherein one end of the mounting groove 65 is a first inclined surface 66 matching the inclined iron 63, and the inclined iron 63 is mounted in cooperation with the first inclined surface 66 through the fastening bolt 64. The rope rack 61 is fixedly installed at the other end of the mounting groove 65, and a rope pressing block 62 is provided between the rope rack 61 and the inclined iron 63. Fig.13As shown, first through holes 611 cooperating with the steel wire rope 46 are provided on both sides of the rope rack 61, a protrusion 612 is provided at the middle position of the rope rack 61 near one end of the rope pressing block 62, a second through hole 613 cooperating with the steel wire rope 46 is provided on the protrusion 612, the second through hole 613 is vertically arranged with the first through hole 611, a circular arc transition section 614 is between the second through hole 613 and the first through hole 611, and the middle position of the steel wire rope 46 is located in the protrusion 612. A pressing groove 621 cooperating with the second through hole 613 is provided at one end of the rope pressing block 62 close to the rope rack 61, and a groove 623 cooperating with the protrusion 612 is provided between the pressing grooves 621. A second inclined surface 622 cooperating with the inclined iron 63 is provided at one end of the rope pressing block 62 close to the inclined iron 63. When the fastening bolt 64 is rotated to press the inclined iron 63, the inclined iron 63 moving into the mounting groove 65 can push the rope pressing block 62 to move and press the rope rack 61, so that the pressing groove 621 on the rope pressing block 62 presses and fixes the steel wire rope 46 in the second through hole 613, thereby completing the fixation of the steel wire rope 46 and the second mounting plate 43.

[0066] Under the premise that the wire rope 46 of the pulley block mechanism on both sides is the same, if the cylinder pulley winch stops at a fixed position to lift the row of goods, when the goods are far away from the cylinder pulley winch, it is necessary to lengthen the wire rope 46 and move the hook 5 to the position of the goods. However, when lifting the goods, the wire ropes 46 on both sides are in an inclined state and the forces they receive are unbalanced. After long-term use, the installation strength of the wire ropes 46 on both sides will be seriously affected, and even fall off. In order to avoid the above situation, Fig.14 As shown, a horizontally arranged third pulley 67 is installed at the bottom of the second mounting plate 43, and the steel wire rope 46 is wound around the third pulley 67. When the steel wire rope 46 is in an inclined state to lift the cargo, since the steel wire ropes 46 on both sides are the same and can rotate with the third pulley 67, the steel wire ropes 46 on both sides can always be of equal length and bear the same tension.

[0067] In order to simplify the driving structure of the boom assembly 3, a single oil cylinder can be used to achieve synchronous extension and retraction of multiple booms, such as Figure 5 As shown, the boom assembly 3 includes a first boom 31, a second boom 32 is installed inside the first boom 31 and can move along the first boom 31, a limit plate 36 is installed on the upper end of the second boom 32 extending out of the first boom 31, and a driving cylinder 35 is installed between the limit plate 36 and the first boom 31. The cylinder body of the driving cylinder 35 is hinged to the first boom 31, and its piston rod is hinged to the limit plate 36. When the driving cylinder 35 is extended or retracted, it can synchronously drive the second boom 32 to move telescopically relative to the first boom 31.

[0068] like Figure 5As shown, a third arm 33 is installed inside the second arm 32 and can move along the second arm 32, and a fourth arm 34 is installed inside the third arm 33 and can move along the third arm 34. The fourth arm 34 extends out of the third arm 33. A first driven device is installed between the second arm 32 and the third arm 33. Figure 5 and Figure 6 As shown, the first driven device includes a first pulley 321 fixedly mounted inside the second boom 32, a first transmission rope 322 is wound around the first pulley 321, one end of the first transmission rope 322 is fixedly mounted on the first boom 31, and the other end of the first transmission rope 322 is fixedly mounted on the third boom 33.

[0069] like Figure 6 and Figure 7 As shown, a second driven device is installed between the third boom 33 and the fourth boom 34, and the second driven device includes a second pulley 331 fixedly installed inside the third boom 33, and a second transmission rope 332 is wound around the second pulley 331, one end of the second transmission rope 332 is fixedly installed on the second boom 32, and the other end of the second transmission rope 332 is fixedly installed on the fourth boom 34.

[0070] Analyze the action linkage relationship of the first driven device between the second arm 32 and the third arm 33: when the driving cylinder 35 pushes the second arm 32 to extend relative to the first arm 31, the first arm 31 is fixed and motionless. Since the first pulley 321 is fixedly mounted on the second arm 32, the first pulley 321 also extends and moves relative to the first arm 31. One end of the first transmission rope 322 wound on the first pulley 321 is fixedly mounted on the first arm 31 and cannot move, and the other end is fixedly mounted on the third arm 33. Since the overall length of the first transmission rope 322 remains unchanged, when the first pulley 321 extends relative to the first arm 31, it will drive the third arm 33 to extend relative to the second arm 32.

[0071] Similarly, the second driven device between the third boom 33 and the fourth boom 34 is analyzed. Since the third boom 33 extends relative to the second boom 32, the second pulley 331 fixedly mounted on the third boom 33 also extends and moves relative to the second boom 32. One end of the second transmission rope 332 wound around the second pulley 331 is fixedly mounted on the second boom 32, and the other end is fixedly mounted on the fourth boom 34. Since the overall length of the second transmission rope 332 remains unchanged, when the second pulley 331 extends relative to the second boom 32, it will drive the fourth boom 34 to extend relative to the third boom 33. That is, when the driving cylinder 35 pushes the second boom 32 to extend from the first boom 31, the third boom 33 can extend from the second boom 32 synchronously, and the fourth boom 34 can extend from the third boom 33 synchronously. One cylinder can push the multi-stage boom to extend and retract.

[0072] The second mounting plate 43 inside the boom assembly 3 can move within the boom assembly 3. Figure 5 and Figure 7 As shown, a folding arm 44 is also fixedly installed at the front end of the boom assembly 3, and a first fixed pulley 47 and a second fixed pulley 45 are provided on both sides of the folding arm 44. A wire rope 46 extending from the inside of the winch body 4 passes around the first fixed pulley 47 and the second fixed pulley 45 and then is connected to the hook 5, wherein the folding arm 44 can be installed at the front end of the fourth boom 34, that is, the front end position of the boom assembly 3.

[0073] The technical solution of the present invention is not limited to the scope of the embodiments described in the present invention. The technical contents not described in detail in the present invention are all well-known technologies.

Claims

1. A cylinder pulley winch, comprising a boom assembly (3), characterized in that: A winch body (4) is installed inside the boom assembly (3), and a driving cylinder (35) is installed outside the boom; the winch body (4) comprises a first mounting plate (41), a telescopic cylinder (42), a second mounting plate (43) and two sets of pulley block mechanisms, the first mounting plate (41) is connected to one end of the telescopic cylinder (42), the second mounting plate (43) is connected to the other end of the telescopic cylinder (42), the first mounting plate (41) is fixed to the boom assembly (3), and the two sets of pulley block mechanisms are symmetrically arranged on the left and right sides of the winch body (4); the first mounting plate (41) is directly fixed to the boom assembly (3) by bolts; Each pulley assembly mechanism comprises a first front wheel assembly (431) and a first rear wheel assembly (411); the first front wheel assembly (431) is mounted on one side of the second mounting plate (43); the first rear wheel assembly (411) is mounted on one side of the first mounting plate (41); the number of wheels of the first rear wheel assembly (411) is one more than that of the first front wheel assembly (431); a steel wire rope (46) is wound between the first rear wheel assembly (411) and the first front wheel assembly (431); and the steel wire rope distribution pattern between the first rear wheel assembly (411) and the first front wheel assembly (431) is as follows: the free end of the steel wire rope (46) first passes around the first wheel of the first rear wheel assembly (411), and then passes forward around the first front wheel assembly (431). The wire rope (46) is wound around the first wheel of the first rear wheel group (411), then goes around the second wheel of the first front wheel group (431), then goes around the third wheel of the first rear wheel group (411), and the winding cycle is repeated. Finally, the free end of the wire rope (46) goes around the last wheel of the first front wheel group (431) and the last wheel of the first rear wheel group (411) in sequence, and then extends out from the front end of the boom assembly (3); the first wheel of the first front wheel group (431) and the first rear wheel group (411) are both the innermost wheels, and the last wheel is both the outermost wheel, and the wheels of the same group are arranged in sequence from the first wheel to the last wheel; The steel wire rope (46) is one or two. If there is one steel wire rope (46), the middle part of the steel wire rope (46) is fixed to the second mounting plate (43) by a fastening device, and the two free ends are respectively wound in two groups of pulley block mechanisms according to the above-mentioned steel wire rope distribution law, and finally the two free ends extend from the front end of the boom assembly (3); if there are two steel wire ropes (46), the fixed end of each steel wire rope (46) is fixed to one side of the second mounting plate (43) by a fastening device, and the free ends are respectively wound in a corresponding group of pulley block mechanisms according to the above-mentioned steel wire rope distribution law, and finally the two free ends extend from the front end of the boom assembly (3). The front end of the arm assembly (3) extends out; the fastening device comprises a rope rack (61), a rope pressing block (62), an inclined iron (63) and a fastening bolt (64); a mounting groove (65) matching with the fastening device is also provided at the bottom of the second mounting plate (43); one end of the mounting groove (65) is a first inclined surface (66) matching with the inclined iron (63); the inclined iron (63) is connected to the second mounting plate (43) via the fastening bolt (64); the rope rack (61) is fixedly installed at the other end of the mounting groove (65); a rope pressing block (62) is provided between the rope rack (61) and the inclined iron (63); The rope rack (61) has first through holes (611) on both sides thereof, each of which is matched with the steel wire rope (46). A convex block (612) is provided at a middle position of the rope rack (61) near one end of the rope pressing block (62). A second through hole (613) is provided on the convex block (612), which is matched with the steel wire rope (46). The second through hole (613) is arranged perpendicular to the first through hole (611). There is an arc transition section (614) between the second through hole (613) and the first through hole (611). The middle position of the steel wire rope (46) is located inside the convex block (612). The rope pressing block (62) A pressing groove (621) matching with the second through hole (613) is provided at one end close to the rope rack (61), a groove (623) matching with the protrusion (612) is provided in the middle of the pressing groove (621), and a second inclined surface (622) matching with the inclined iron (63) is provided at one end of the rope pressing block (62) close to the inclined iron (63). When the inclined iron (63) moves into the installation groove (65), it can push the rope pressing block (62) to press the rope rack (61), thereby causing the pressing groove (621) on the rope pressing block (62) to press and fix the steel wire rope (46) in the second through hole (613).

2. The cylinder pulley winch according to claim 1, characterized in that: The arrangement direction of the steel wire rope (46) between the wheels of the first rear wheel group (411) is from the innermost wheel to the outermost wheel; the arrangement direction of the steel wire rope (46) between the wheels of the first front wheel group (431) is from the innermost wheel to the outermost wheel, and the free end of the steel wire rope (46) finally passes around the outermost wheel of the first rear wheel group (411) and extends forward outside the boom assembly (3).

3. The cylinder pulley winch according to claim 1, characterized in that: Each group of pulley mechanisms further comprises a second rear wheel group (412) and a second front wheel group (432); the second rear wheel group (412) is mounted on the first mounting plate (41), the second front wheel group (432) is mounted on the second mounting plate (43), the second rear wheel group (412) and the second front wheel group (432) are located between the first rear wheel group (411) and the first front wheel group (431); the diameter of the second rear wheel group (412) is smaller than the diameter of the first rear wheel group (411), and the diameter of the second front wheel group (432) is smaller than the diameter of the first front wheel group (431); the second rear wheel group (412) and the second front wheel group (432) have the same number of wheels; The distribution pattern of the steel wire rope (46) is two winding stages, namely the first wheel group and the second wheel group. In the first winding stage, the free end of the steel wire rope (46) first passes around the first wheel of the second rear wheel group (412), then passes around the first wheel of the second front wheel group (432), then passes around the second wheel of the second rear wheel group (412), then passes around the second wheel of the second front wheel group (432), then passes around the third wheel of the second rear wheel group (412), and the winding cycle is repeated until the free end of the steel wire rope (46) passes around the last wheel of the second front wheel group (432). The wire rope (46) is wound backward to the first wheel of the first rear wheel group (411) and the second winding stage begins. The distribution pattern of the second winding stage is the same as the distribution pattern of the wire rope (46) between the first rear wheel group (411) and the first front wheel group (431). Finally, after the wire rope (46) passes around the last wheel of the first rear wheel group (411), its free end extends out from the front end of the boom assembly (3). The first wheel of the second rear wheel group (412) and the second front wheel group (432) are both the outermost wheels, and the last wheel is both the innermost wheel. The first wheel and the last wheel of the same group are arranged in sequence.

4. The cylinder pulley winch according to claim 3, characterized in that: The steel wire rope (46) is distributed on each wheel of the second rear wheel group (412) and the second front wheel group (432) in an arrangement from the outermost side to the innermost side, and the steel wire rope (46) is distributed on each wheel of the first rear wheel group (411) and the first front wheel group (431) in an arrangement from the innermost side to the outermost side, and the free end of the steel wire rope (46) finally extends forward from the outermost side of the first rear wheel group (411) to the outside of the boom assembly (3).

5. The cylinder pulley winch according to claim 1, characterized in that: The boom assembly (3) comprises a first boom (31), a second boom (32) being mounted inside the first boom (31) and being movable along the first boom, a limit plate (36) being mounted on the upper end of the second boom (32) extending out of the first boom (31), a driving cylinder (35) being hingedly mounted between the limit plate (36) and the first boom (31); a third boom (33) being mounted inside the second boom (32) and being movable along the first boom, a fourth boom (34) being mounted inside the third boom (33) and being movable along the first boom, wherein a first follower device is mounted between the second boom (32) and the third boom (33), the first follower device comprising a first A pulley (321), a first transmission rope (322) wound around the first pulley (321), one end of the first transmission rope (322) fixedly mounted on the first suspension arm (31), and the other end of the first transmission rope (322) fixedly mounted on the third suspension arm (33); a second driven device is installed between the third suspension arm (33) and the fourth suspension arm (34), the second driven device comprises a second pulley (331) fixedly mounted inside the third suspension arm (33), a second transmission rope (332) wound around the second pulley (331), one end of the second transmission rope (332) fixedly mounted on the second suspension arm (32), and the other end of the second transmission rope (332) fixedly mounted on the fourth suspension arm (34).

6. The cylinder pulley winch according to claim 1, characterized in that: The rotating shaft of the first rear wheel assembly (411) is hingedly mounted on the boom assembly (3); a mounting hole matching the rotating shaft is provided on the side wall at the rear end of the boom assembly (3); and two sets of locking and positioning devices are provided between the telescopic oil cylinder (42) and the boom assembly (3); Each set of locking and positioning devices comprises a cylinder positioning block (71) fixedly mounted on the telescopic cylinder (42); a reinforcing plate (72) is provided on the boom assembly (3) corresponding to the position of the cylinder positioning block (71); a pressing block (73) is matched with the inner thread of the reinforcing plate (72); the pressing block (73) can be rotated to press the cylinder positioning block (71); a light hole is provided in the pressing block (73); a bolt (74) is installed in the light hole; a screw hole matched with the bolt (74) is provided on the cylinder positioning block (71); a pressing plate (75) is provided between the end of the bolt (74) and the reinforcing plate (72); the bolt (74) can be rotated into the cylinder positioning block (71) to fix the telescopic cylinder (42) and the boom assembly (3).

7. The cylinder pulley winch according to claim 6, characterized in that: A folding arm (44) is fixedly mounted at the front end of the boom assembly (3), and a first fixed pulley (47) and a second fixed pulley (45) are arranged on both sides of the folding arm (44). A steel wire rope (46) extending from the inside of the winch body (4) passes around the first fixed pulley (47) and the second fixed pulley (45) and is connected to the hook (5), wherein the folding arm (44) is mounted at the front end of the fourth boom (34).

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