阅读说明：本技术 一种动、定滑轮转换的滑轮组 (Pulley block with movable pulley and fixed pulley converted ) 是由 沈墅 王鹏 李河 于 2020-05-09 设计创作，主要内容包括：本发明属于起重机械用滑轮组技术领域,具体的说是一种动、定滑轮转换的滑轮组,包括控制器、操作电机、定滑轮架和动滑轮架；所述控制器用于控制操作电机工作；所述操作电机用于控制缆绳；所述定滑轮架下端两侧对称设置有所述定滑轮,所述动滑轮架两侧对称设置有动滑轮,所述定滑轮架下端面中部固定设置有圆筒,所述圆筒内壁圆周均匀开设有收缩槽,每个所述收缩槽内均嵌入设置有卡块,所述固定销表面开设有均匀布置的第一限位槽；所述第一限位槽倒梯形设计；所述固定销表面开设有均匀布置的第二限位槽；所述第二限位槽倾斜设计；本发明动在滑轮转换成定滑轮使用时,无需人力将定滑轮与动滑轮拆卸或安装,且拆卸安装快捷方便。(The invention belongs to the technical field of pulley blocks for hoisting machinery, and particularly relates to a pulley block for conversion of a movable pulley and a fixed pulley, which comprises a controller, an operation motor, a fixed pulley frame and a movable pulley frame; the controller is used for controlling the operation motor to work; the operation motor is used for controlling the cable; the fixed pulleys are symmetrically arranged on two sides of the lower end of the fixed pulley frame, the movable pulleys are symmetrically arranged on two sides of the movable pulley frame, a cylinder is fixedly arranged in the middle of the lower end face of the fixed pulley frame, contraction grooves are uniformly formed in the circumference of the inner wall of the cylinder, a fixture block is embedded into each contraction groove, and first limit grooves which are uniformly distributed are formed in the surface of the fixed pin; the first limiting groove is in an inverted trapezoidal design; the surface of the fixing pin is provided with second limit grooves which are uniformly distributed; the second limiting groove is designed in an inclined mode; when the movable pulley is converted into the fixed pulley for use, the fixed pulley and the movable pulley do not need to be disassembled or assembled manually, and the disassembly and the assembly are quick and convenient.)

1. A pulley block for conversion between a movable pulley and a fixed pulley comprises a controller, an operation motor, a fixed pulley frame (2) and a movable pulley frame (9); the controller is used for controlling the operation motor to work; the operation motor is used for controlling the cable; fixed pulley yoke (2) lower extreme bilateral symmetry is provided with fixed pulley (3), movable pulley yoke (9) bilateral symmetry is provided with movable pulley (7), fixed pulley yoke (2) up end bilateral symmetry is provided with fixed plate (1), terminal surface middle part is provided with lifting hook, its characterized in that under movable pulley yoke (9): a cylinder (5) is fixedly arranged in the middle of the lower end face of the fixed pulley frame (2), a cylinder opening is formed in the lower end face of the cylinder (5), contraction grooves (10) are uniformly formed in the circumference of the inner wall of the cylinder (5), a clamping block (12) is embedded into each contraction groove (10), the contraction grooves (10) are in clearance fit with the corresponding clamping blocks (12), a reset spring (11) is fixedly arranged on the inner bottom wall of each contraction groove (10), the reset spring (11) is fixedly connected with the clamping blocks (12), and a fixing pin (13) is fixedly arranged on the lower end face of the cylinder (5) corresponding to the upper end face of the movable pulley frame (9); the surface of the fixing pin (13) is provided with first limit grooves (21) which are uniformly distributed; the first limiting groove (21) is designed in an inverted trapezoid shape; the surface of the fixing pin (13) is provided with second limit grooves (22) which are uniformly distributed; the second limit groove (22) is designed in an inclined mode; the number of the first limiting grooves (21), the number of the second limiting grooves (22) and the number of the contraction grooves (10) are equal; the second limiting groove (22) is positioned below the first limiting groove (21), the upper end of the first limiting groove (21) extends to the upper end of the fixing pin (13), and the lower end of the first limiting groove (21) is communicated with the upper end of the corresponding second limiting groove (22); a clamping groove (14) is formed in the outer side surface of the fixing pin (13) between every two adjacent second limiting grooves (22); the inner wall of the cylinder (5) is fixedly connected with rubber rods (23) which are uniformly arranged; the rubber rods (23) are arranged in one-to-one correspondence with the first limiting grooves (21), and the rubber rods (23) are matched with the first limiting grooves (21); the fixture block (12) is in a semicircular table shape design, and the upper surface of the fixture block (12) is a plane; the clamping groove (14) is matched with the clamping block (12).

2. The pulley block for changing the movable pulley and the fixed pulley according to claim 1, wherein: the lower surface of the clamping groove (14) is fixedly connected with a rubber layer (24); a cavity (25) is formed in the rubber layer (24); an assisting groove (27) is formed at the bottom of the clamping groove (14); an assisting rod (26) is fixedly connected in the assisting groove (27) through a spring; the assisting rod (26) is connected with the assisting groove (27) in a sliding way; the cavity (25) is communicated with an assisting groove (27).

3. The pulley block for changing the movable pulley and the fixed pulley as claimed in claim 2, wherein: the upper surface of the rubber layer (24) is provided with uniformly distributed lubricating grooves; and a ball is rotatably connected in each lubricating groove.

4. The pulley block for changing the movable pulley and the fixed pulley according to claim 1, wherein: the movable pulley frame is characterized in that connecting frames (15) are fixedly arranged at two ends of the upper surface of the movable pulley frame (9), fixed blocks (8) are fixedly arranged at two ends of each connecting frame (15), a sliding cavity (16) penetrates through the middle of each fixed block (8), a sliding plate (17) is arranged in each sliding cavity (16), a sliding chute is arranged on the inner side wall of each sliding cavity (16), edges of two sides of each sliding plate (17) are embedded into the sliding chute and are in sliding connection with the corresponding sliding cavity (16), a through hole is formed in the middle of each sliding plate (17) and corresponds to a wire groove of the movable pulley (7), a screw rod (18) is arranged at one end of each fixed block (8), each fixed block (8) is connected with the corresponding screw rod (18) in a screwing mode, a shaft sleeve (19) is fixedly arranged on the outer surface of each sliding plate (17), a cylinder (20) is arranged in each shaft sleeve (19), and, the screw (18) penetrates through the shaft sleeve (19) and is fixedly connected with the cylinder (20), the screw (18) is in clearance fit with the shaft sleeve (19), and the diameter of the cylinder (20) is larger than that of the screw (18).

5. The pulley block for changing the movable pulley and the fixed pulley according to claim 1, wherein: the upper end of the outer surface of the movable pulley frame (9) is provided with a buckle (6), and the lower end of the outer surface of the cylinder (5) is provided with a clamping column matched with the buckle (6).

6. The pulley block for changing the movable pulley and the fixed pulley according to claim 1, wherein: the diameter of the fixed pulley (3) is five thirds of the diameter of the movable pulley (7), and the two ends of the fixed pulley (3) and the movable pulley (7) are provided with limit baffles (4).

Technical Field

The invention belongs to the technical field of pulley blocks for hoisting machinery, and particularly relates to a pulley block with a movable pulley and a fixed pulley converted.

Background

The pulley is a small wheel with a groove at the periphery and capable of rotating around a shaft, when the pulley is used, the pulley with the fixed position of the shaft is called a fixed pulley, the pulley with the position of the shaft moving along with a pulled object is called a movable pulley, the fixed pulley can change the direction of force but cannot pull the object in a labor-saving manner, the movable pulley cannot change the direction of force but can pull the object in a labor-saving manner, and the pulley block is combined with the fixed pulley and the movable pulley, so that the direction of the force can be changed, and the object can be pulled in a labor-saving manner.

The existing pulley block has the problems that the fixed pulley and the movable pulley need to be disassembled or assembled when the change multiplying power is changed or the movable pulley is changed into the fixed pulley for use, the process is operated manually, time and labor are wasted, the production efficiency is influenced, meanwhile, the angle of the cable on the fixed pulley and the movable pulley needs to be adjusted manually, time and labor are wasted, and the cable is extremely easy to clamp the fixed pulley and the movable pulley.

Disclosure of Invention

The pulley block comprises a fixed pulley, a movable pulley.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a pulley block capable of converting a movable pulley and a fixed pulley, which comprises a controller, an operation motor, a fixed pulley frame and a movable pulley frame; the controller is used for controlling the operation motor to work; the operation motor is used for controlling the cable; the fixed pulleys are symmetrically arranged on two sides of the lower end of the fixed pulley frame, the movable pulleys are symmetrically arranged on two sides of the movable pulley frame, fixed plates are symmetrically arranged on two sides of the upper end face of the fixed pulley frame, a lifting hook is arranged in the middle of the lower end face of the movable pulley frame, a cylinder is fixedly arranged in the middle of the lower end face of the fixed pulley frame, a cylinder opening is arranged on the lower end face of the cylinder, contraction grooves are uniformly formed in the circumference of the inner wall of the cylinder, a fixture block is embedded into each contraction groove, the contraction grooves are in clearance fit with the corresponding fixture blocks, a reset spring is fixedly arranged on the inner wall of each contraction groove, the reset springs are fixedly connected with the fixture blocks, and a fixed pin is fixedly arranged on the lower end face; the surface of the fixing pin is provided with first limit grooves which are uniformly distributed; the first limiting groove is in an inverted trapezoidal design; the surface of the fixing pin is provided with second limit grooves which are uniformly distributed; the second limiting groove is designed in an inclined mode; the number of the first limiting grooves, the number of the second limiting grooves and the number of the contraction grooves are equal; the second limiting groove is positioned below the first limiting groove, the upper end of the first limiting groove extends to the upper end of the fixing pin, and the lower end of the first limiting groove is communicated with the upper end of the corresponding second limiting groove; a clamping groove is formed in the outer side surface of the fixing pin between every two adjacent second limiting grooves; the inner wall of the cylinder is fixedly connected with rubber rods which are uniformly distributed; the rubber rods and the first limiting grooves are arranged in a one-to-one correspondence manner, and the rubber rods are matched with the first limiting grooves; the fixture block is in a semicircular truncated cone shape, and the upper surface of the fixture block is a plane; the clamping groove is matched with the clamping block; when the fixed pulley is required to be fixed and the fixed pulley is started and used, the operating motor drives the movable pulley frame to move upwards through the cable, so that the fixed pin is embedded into the cylinder, the rubber rod is drawn into the corresponding first limiting groove and drawn into the second limiting groove through the first limiting groove in the embedding process, the fixed pin rotates and slides in the cylinder through the inclined design of the second limiting groove, the fixed pin contacts with the clamping block and extrudes the clamping block into the contraction groove, the fixed pin rotates and rotates back and forth in the cylinder due to the cable swinging and matching of the second limiting groove and the soft elastic arrangement of the rubber rod, when the fixed pin rises to the same horizontal plane as the clamping block, the clamping block aligns with the clamping groove in the swinging process, the clamping block is ejected into the clamping groove under the action of the reset spring, so that the fixed pin is limited and fixed, and the movable pulley frame and the movable pulley have larger mass, make fixed pin and drum fastening connection, convenient and fast, the material resources of using manpower sparingly, elasticity through the rubber pole can effectively cushion the fixed pin simultaneously, prevent that the fixed pin from rocking the in-process striking drum, thereby effectively improve the life of fixed pin and drum, reduce the degree of wear, simultaneously through the semicircular table shape design of fixture block, in the draw-in groove of the fixed pin in the fixture block of being convenient for more smooth the inserting of shaking, and through the semicircular table shape design of fixture block, be convenient for upwards lift the pulley yoke back through the hawser, compress the fixture block to shrink inslot portion once more, then rotate and move the pulley yoke and can relieve the locking.

Preferably, the lower surface of the clamping groove is fixedly connected with a rubber layer; a cavity is formed in the rubber layer; an assisting groove is formed at the bottom of the clamping groove; an assisting rod is fixedly connected in the assisting groove through a spring; the assisting rod is connected with the assisting groove in a sliding manner; the cavity is communicated with the assisting groove; the during operation, upwards mention when moving the pulley yoke through the hawser and compress the fixture block to shrink inslot portion in-process once more, extrude the rubber layer, thereby extrude the cavity, make the gaseous entering of cavity in assist the inslot, promote to correspond and assist pole roll-off and assist the groove, thereby promote fixture block roll-off draw-in groove through assisting the pole, the setting on cooperation rubber layer, reduce the frictional force of fixture block and draw-in groove, thereby reduce the degree of wear of fixture block and draw-in groove, improve the life of fixture block and draw-in groove, behind the fixture block roll-off draw-in groove, make under the spring action and assist the pole to roll-in again and.

Preferably, the upper surface of the rubber layer is provided with uniformly arranged lubricating grooves; a ball is rotatably connected in each lubricating groove; the during operation, when the fixture block extrudees the rubber layer, can effectively reduce the frictional force between fixture block and the rubber layer through the ball, make things convenient for the fixture block roll-off draw-in groove, can effectively improve the fixture block through the ball simultaneously to the extrusion degree of cavity, improve the dynamics that helps the pole to promote the fixture block, further make things convenient for the fixture block roll-off draw-in groove.

Preferably, the two ends of the upper surface of the movable pulley frame are fixedly provided with connecting frames, the two ends of each connecting frame are fixedly provided with fixed blocks, the middle parts of the fixed blocks are provided with sliding cavities in a penetrating manner, sliding plates are arranged in the sliding cavities, and the inner side wall of the sliding cavity is provided with a sliding chute, the edges of the two sides of the sliding plate are embedded into the sliding chute and are connected with the sliding cavity in a sliding way, the middle part of the sliding plate is provided with a through hole which corresponds to the wire groove of the movable pulley, and one end of the fixed block is provided with a screw rod, the fixed block is connected with the screw rod in a screwing way, the outer surface of the sliding plate is fixedly provided with a shaft sleeve, a cylinder is arranged in the shaft sleeve, the shaft sleeve is in clearance fit with the cylinder, the screw penetrates through the shaft sleeve and is fixedly connected with the cylinder, the screw is in clearance fit with the shaft sleeve, and the diameter of the cylinder is larger than that of the screw; when the cable guide device works, when the entering angle or the extending angle of the cable on the movable pulley needs to be changed, the screw rod is operated by rotating clockwise or anticlockwise, so that the sliding plate slides up and down, the position of the sliding plate is changed, the entering angle or the extending angle of the cable wound on the movable pulley is further changed, the cable between the movable pulley below and the fixed pulley above is enabled to be in safe transition, and the cable is prevented from being separated from the pulley groove.

Preferably, the upper end of the outer surface of the movable pulley frame is provided with a buckle, and the lower end of the outer surface of the cylinder is provided with a clamping column matched with the buckle; during operation, after the clamping block is clamped into the clamping groove, the clamping column is manually clamped by the clamping block, the movable pulley frame and the cylinder are prevented from being unlocked due to misoperation, and the safety of equipment is improved.

Preferably, the diameter of the fixed pulley is five thirds of that of the movable pulley, and two ends of the fixed pulley and two ends of the movable pulley are provided with limit baffles; when the lifting device works, the diameter of the fixed pulley is larger than that of the movable pulley, so that the fixed pulley is not interfered by the movable pulley below when being lifted.

The invention has the following beneficial effects:

1. according to the pulley block with the conversion function of the movable pulley and the fixed pulley, the rubber rod is arranged in the corresponding first limiting groove in a sliding mode, the rubber rod is arranged in the second limiting groove in a sliding mode, the fixing pin rotates and slides in the cylinder through the inclined design of the second limiting groove, the fixing pin is made to contact with the clamping block and extrude the clamping block into the shrinkage groove, the cable rope can shake to match the second limiting groove to enable the fixing pin to rotate and the soft elastic arrangement of the rubber rod, the fixing pin can rotate back and forth in the cylinder, when the fixing pin rises to the level of the clamping groove and the clamping block, the clamping block can be aligned with the clamping groove in the shaking process, the clamping block is bounced into the clamping groove under the action of the reset spring, and the fixing pin is limited and fixed.

2. According to the pulley block with the conversion of the movable pulley and the fixed pulley, the fixed pin can be effectively buffered through the elasticity of the rubber rod, and the fixed pin is prevented from impacting the cylinder in the shaking process, so that the service lives of the fixed pin and the cylinder are effectively prolonged, and the abrasion degree is reduced.

3. According to the pulley block with the conversion between the movable pulley and the fixed pulley, due to the semicircular design of the clamping block, the clamping block can be conveniently and smoothly inserted into the clamping groove of the fixed pin during shaking, and due to the semicircular design of the clamping block, after the pulley frame is started by lifting the cable rope upwards, the clamping block is compressed into the shrinkage groove again, and then the movable pulley frame is rotated to release locking.

4. According to the pulley block with the conversion of the movable pulley and the fixed pulley, the position of the sliding plate is changed by operating the screw rod, so that the entering angle or the extending angle of the cable wound on the movable pulley is changed, the cable between the movable pulley positioned below and the fixed pulley positioned above is convenient to transition safely, and the cable is prevented from being separated from the pulley groove.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a front view of the present invention;

FIG. 2 is a schematic view of the construction of the connection of the cylinder to the retainer pin;

FIG. 3 is a top view of the position of the fixed block on the movable pulley carriage;

FIG. 4 is an enlarged view of a portion of FIG. 2 at A;

FIG. 5 is an enlarged view of a portion of FIG. 3 at B;

fig. 6 is a perspective view of the latch;

FIG. 7 is a partial cross-sectional view of the retaining pin;

in the figure: fixed plate 1, fixed pulley frame 2, fixed pulley 3, limit baffle 4, drum 5, buckle 6, movable pulley 7, fixed block 8, movable pulley frame 9, shrink groove 10, reset spring 11, fixture block 12, fixed pin 13, draw-in groove 14, link 15, smooth chamber 16, slide 17, screw rod 18, axle sleeve 19, cylinder 20, first spacing groove 21, second spacing groove 22, rubber pole 23, rubber layer 24, cavity 25, help pole 26, help groove 27.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 7, the pulley block for changing the movable pulley and the fixed pulley comprises a controller, an operation motor, a fixed pulley frame 2 and a movable pulley frame 9; the controller is used for controlling the operation motor to work; the operation motor is used for controlling the cable; the fixed pulleys 3 are symmetrically arranged on two sides of the lower end of the fixed pulley frame 2, the movable pulleys 7 are symmetrically arranged on two sides of the movable pulley frame 9, the fixed plates 1 are symmetrically arranged on two sides of the upper end face of the fixed pulley frame 2, the lifting hook is arranged in the middle of the lower end face of the movable pulley frame 9, the cylinder 5 is fixedly arranged in the middle of the lower end face of the fixed pulley frame 2, the lower end face of the cylinder 5 is provided with a cylinder opening, the circumference of the inner wall of the cylinder 5 is uniformly provided with contraction grooves 10, each contraction groove 10 is embedded with a fixture block 12, the contraction grooves 10 are in clearance fit with the corresponding fixture blocks 12, the inner wall of each contraction groove 10 is fixedly provided with a reset spring 11, the reset springs 11 are fixedly connected with the fixture blocks 12, and the lower end face of the cylinder 5 is fixedly provided with; the surface of the fixing pin 13 is provided with first limit grooves 21 which are uniformly distributed; the first limiting groove 21 is designed in an inverted trapezoid shape; the surface of the fixing pin 13 is provided with second limit grooves 22 which are uniformly distributed; the second limiting groove 22 is designed in an inclined manner; the number of the first limiting grooves 21, the number of the second limiting grooves 22 and the number of the contraction grooves 10 are equal; the second limiting groove 22 is positioned below the first limiting groove 21, the upper end of the first limiting groove 21 extends to the upper end of the fixing pin 13, and the lower end of the first limiting groove 21 is communicated with the upper end of the corresponding second limiting groove 22; a clamping groove 14 is formed between every two adjacent second limiting grooves 22 on the outer side surface of the fixing pin 13; the inner wall of the cylinder 5 is fixedly connected with rubber rods 23 which are uniformly distributed; the rubber rods 23 are arranged in one-to-one correspondence with the first limiting grooves 21, and the rubber rods 23 are matched with the first limiting grooves 21; the fixture block 12 is in a semi-circular truncated cone shape, and the upper surface of the fixture block 12 is a plane; the clamping groove 14 is matched with the clamping block 12; when the device works, when the movable pulley 7 needs to be fixed and the fixed pulley 3 is started and used, the operation motor drives the movable pulley frame 9 to move upwards through the cable, so that the fixed pin 13 is embedded into the cylinder 5, the rubber rod 23 is scratched into the corresponding first limiting groove 21 in the embedding process and is scratched into the second limiting groove 22 through the first limiting groove 21, the fixed pin 13 rotates and slides in the cylinder 5 through the inclined design of the second limiting groove 22, the fixed pin 13 contacts the fixture block 12 and extrudes the fixture block 12 into the contraction groove 10, as the cable shakes and cooperates with the second limiting groove 22 to enable the fixed pin 13 to rotate and the soft elastic arrangement of the rubber rod 23, the fixed pin 13 rotates back and forth in the cylinder 5, when the fixed pin 13 rises to the same horizontal plane as the fixture block 14, the fixture block 12 aligns with the fixture groove 14 in the shaking process, the fixture block 12 is popped into the fixture groove 14 under the action of the reset spring 11, make fixed pin 13 spacing and fixed, and movable pulley frame 9 and movable pulley 7 itself have a great quality, make fixed pin 13 and drum 5 fastening connection, convenient and fast, the material resources of using manpower sparingly, simultaneously can effectively cushion fixed pin 13 through the elasticity of rubber pole 23, prevent that fixed pin 13 from rocking the in-process striking drum 5, thereby effectively improve the life of fixed pin 13 and drum 5, reduce the degree of wear, simultaneously through the semicircular platform shape design of fixture block 12, be convenient for fixture block 12 more smooth insert in shaking in the draw-in groove 14 of fixed pin 13, and through the semicircular platform shape design of fixture block 12, be convenient for upwards mention movable pulley frame 9 back through the hawser, compress fixture block 12 inside shrink groove 10 once more, then it can relieve the locking to rotate movable pulley frame 9.

As an embodiment of the present invention, a rubber layer 24 is fixedly connected to the lower surface of the card slot 14; a cavity 25 is formed in the rubber layer 24; an assisting groove 27 is formed at the bottom of the clamping groove 14; an assisting rod 26 is fixedly connected in the assisting groove 27 through a spring; the assisting rod 26 is connected with the assisting groove 27 in a sliding mode; the cavity 25 is communicated with an assisting groove 27; during operation, upwards mention movable pulley yoke 9 through the hawser and compress fixture block 12 to the inside in-process of shrink groove 10 once more, extrusion rubber layer 24, thereby extrude cavity 25, make the interior gas of cavity 25 get into and assist in the groove 27, promote to correspond and assist the groove 27 is assisted in the roll-off of pole 26, thereby promote fixture block 12 roll-off draw-in groove 14 through assisting pole 26, the setting of cooperation rubber layer 24, reduce the frictional force of fixture block 12 and draw-in groove 14, thereby reduce the degree of wear of fixture block 12 and draw-in groove 14, improve the life of fixture block 12 and draw-in groove 14, after fixture block 12 roll-off draw-in groove 14, make under the spring action and assist in pole 26 roll-off again and assist in the groove.

As an embodiment of the present invention, the upper surface of the rubber layer 24 is provided with lubrication grooves which are uniformly arranged; a ball is rotatably connected in each lubricating groove; during operation, when fixture block 12 extrudees rubber layer 24, can effectively reduce the frictional force between fixture block 12 and the rubber layer 24 through the ball, make things convenient for fixture block 12 roll-off draw-in groove 14, can effectively improve the extrusion degree of fixture block 12 to cavity 25 through the ball simultaneously, improve the dynamics that helps pole 26 to promote fixture block 12, further make things convenient for fixture block 12 roll-off draw-in groove 14.

As an embodiment of the present invention, two ends of the upper surface of the movable pulley frame 9 are fixedly provided with a connecting frame 15, two ends of the connecting frame 15 are fixedly provided with a fixed block 8, the middle part of the fixed block 8 is provided with a sliding cavity 16 in a penetrating manner, the sliding cavity 16 is provided with a sliding plate 17, the inner side wall of the sliding cavity 16 is provided with a sliding chute, two side edges of the sliding plate 17 are embedded into the sliding chute and are slidably connected with the sliding cavity 16, the middle part of the sliding plate 17 is provided with a through hole, the through hole corresponds to a wire casing of the movable pulley 7, one end of the fixed block 8 is provided with a screw rod 18, the fixed block 8 is rotatably connected with the screw rod 18, the outer surface of the sliding plate 17 is fixedly provided with a shaft sleeve 19, a cylinder 20 is arranged in the shaft sleeve 19, the shaft sleeve 19 is in clearance fit with the cylinder 20, and, the screw 18 is in clearance fit with the shaft sleeve 19, and the diameter of the cylinder 20 is larger than that of the screw 18; when the cable guide device works, when the entering angle or the extending angle of the cable on the movable pulley 7 needs to be changed, the screw 18 is operated by rotating clockwise or anticlockwise, so that the sliding plate 17 slides up and down, the position of the sliding plate 17 is changed, the entering angle or the extending angle of the cable wound on the movable pulley 7 is further changed, the cable between the movable pulley 7 positioned below and the fixed pulley 3 positioned above is conveniently in safe transition, and the cable is prevented from being separated from a pulley groove.

As an embodiment of the present invention, a buckle 6 is disposed at the upper end of the outer surface of the movable pulley frame 9, and a clamping column matched with the buckle 6 is disposed at the lower end of the outer surface of the cylinder 5; when the device works, after the clamping block 12 is clamped into the clamping groove 14, the clamping block 6 is manually clamped with the clamping column, the movable pulley frame 9 and the cylinder 5 are prevented from being unlocked due to misoperation, and the safety of the device is improved.

As an embodiment of the present invention, the diameter of the fixed pulley 3 is five thirds of the diameter of the movable pulley 7, and both ends of the fixed pulley 3 and the movable pulley 7 are provided with a limit baffle 4; during operation, the diameter of the fixed pulley 3 is larger than that of the movable pulley 7, so that the fixed pulley 3 is not interfered by the movable pulley 7 below when being lifted.

When the device works, when the movable pulley 7 needs to be fixed and the fixed pulley 3 is started and used, the operation motor drives the movable pulley frame 9 to move upwards through the cable, so that the fixed pin 13 is embedded into the cylinder 5, the rubber rod 23 is scratched into the corresponding first limiting groove 21 in the embedding process and is scratched into the second limiting groove 22 through the first limiting groove 21, the fixed pin 13 rotates and slides in the cylinder 5 through the inclined design of the second limiting groove 22, the fixed pin 13 contacts the fixture block 12 and extrudes the fixture block 12 into the contraction groove 10, as the cable shakes and cooperates with the second limiting groove 22 to enable the fixed pin 13 to rotate and the soft elastic arrangement of the rubber rod 23, the fixed pin 13 rotates back and forth in the cylinder 5, when the fixed pin 13 rises to the same horizontal plane as the fixture block 14, the fixture block 12 aligns with the fixture groove 14 in the shaking process, the fixture block 12 is popped into the fixture groove 14 under the action of the reset spring 11, the fixing pin 13 is limited and fixed, the movable pulley frame 9 and the movable pulley 7 have larger mass, the fixing pin 13 is tightly connected with the cylinder 5, meanwhile, the fixing pin 13 can be effectively buffered through the elasticity of the rubber rod 23, the fixing pin 13 is prevented from impacting the cylinder 5 in the shaking process, the clamping block 12 can be conveniently and smoothly inserted into the clamping groove 14 of the shaking fixing pin 13 through the semicircular table shape design of the clamping block 12, the clamping block 12 can be conveniently compressed into the contraction groove 10 again after the movable pulley frame 9 is lifted upwards through a cable, and then the locking can be released by rotating the movable pulley frame 9; when the pulley frame 9 is lifted upwards through the cable to compress the fixture block 12 into the shrinkage groove 10 again, the rubber layer 24 is extruded, so that the cavity 25 is extruded, gas in the cavity 25 enters the assisting groove 27, the corresponding assisting rod 26 is pushed to slide out of the assisting groove 27, the fixture block 12 is pushed to slide out of the fixture groove 14 through the assisting rod 26, the friction force between the fixture block 12 and the fixture groove 14 is reduced by matching the arrangement of the rubber layer 24, the abrasion degree of the fixture block 12 and the fixture groove 14 is reduced, and after the fixture block 12 slides out of the fixture groove 14, the assisting rod 26 slides into the assisting groove 27 again under the action of the spring; when the entering angle or the extending angle of the cable on the movable pulley 7 needs to be changed, the operating screw 18 is rotated clockwise or anticlockwise to enable the sliding plate 17 to slide up and down, the position of the sliding plate 17 is changed, the entering angle or the extending angle of the cable wound on the movable pulley 7 is further changed, after the clamping block 12 is clamped into the clamping groove 14, the clamping block 6 is manually clamped with the clamping column, the movable pulley frame 9 and the cylinder 5 are prevented from being unlocked due to misoperation, and the safety of equipment is improved.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.