Lifting belt length adjusting device

Abstract

The invention relates to the field of lifting belts, and particularly discloses a lifting belt length adjusting device which comprises two symmetrically-arranged supports, a winding assembly used for winding a lifting belt is rotationally arranged between the two supports, a detachable shaft sleeve is fixed between the two supports, and each support comprises a shell and frame rods fixedly arranged on the periphery of the shell and symmetrically arranged. A fixed wheel is in spline connection with the interior of the shell, a one-way wheel is rotationally connected into the fixed wheel, the lifting belt penetrates through the position between the two belt winding shafts, the two belt winding shafts are rotated, the lifting belt is wound to the peripheries of the two belt winding shafts, and therefore the length of the lifting belt is shortened; the length of the hoisting belt can be kept fixed in the hoisting process after the hoisting belt is wound on the two belt winding shafts, the two shaft sleeves are arranged, the shaft sleeves can abut against the hoisting belt in the hoisting process of the hoisting belt, and therefore the situation that the hoisting device is turned over due to traction of the hoisting belt is avoided.

Description

Technical Field

[0001] The present invention relates to the field of lifting slings, and specifically to a device for adjusting the length of a lifting sling. Background Art

[0002] Lifting slings are generally made of high-strength polyester filaments, and have multiple advantages such as high strength, wear resistance, oxidation resistance, and ultraviolet resistance. They are mainly used for lifting operations. The length of traditional lifting slings is generally not adjustable. When the length of the lifting sling is too long during the lifting process, the operator needs to spend more time and effort to adjust the position and length of the lifting sling, increasing the complexity of the lifting operation and making the lifting process more difficult. If the lifting sling is shortened by tying a knot, the knot of the lifting sling becomes too firm due to pulling, making it inconvenient to untie the knot of the lifting sling and affecting subsequent lifting operations. Summary of the Invention

[0003] The purpose of the present invention is to provide a device for adjusting the length of a lifting sling to overcome the above-mentioned defects in the prior art.

[0004] According to a device for adjusting the length of a lifting sling of the present invention, it includes two symmetrically arranged brackets. A winding assembly for winding the lifting sling is rotatably arranged between the two brackets. A detachable bushing is fixed between the two brackets. The bracket includes a housing and rod-shaped members symmetrically fixed on the outer periphery of the housing. A fixed wheel is slidably connected inside the housing. A one-way wheel is rotatably connected inside the fixed wheel. A plurality of circumferentially evenly distributed one-way grooves are formed on the outer periphery of the one-way wheel. A plurality of one-way limit pins that abut against the bottom walls of the one-way grooves are slidably connected inside the fixed wheel, so that the one-way wheel and the fixed wheel can only rotate in one direction. The winding assembly includes two winding shafts symmetrically arranged with the axis of the one-way wheel as the center. Both ends of the winding shaft are rotatably connected with connecting members. A central shaft that coincides with the axis of the one-way wheel is fixed on the connecting member. The central shaft is fixed at the center of the one-way wheel.

[0005] Through the above technical solution, the lifting sling passes through between the two winding shafts. By rotating the two winding shafts, the lifting sling is wound around the outer peripheries of the two winding shafts, thereby shortening the length of the lifting sling. The one-way wheel and the fixed wheel can only rotate in one direction, ensuring that after the two winding shafts wind the lifting sling, the length of the lifting sling can be kept fixed during the lifting process. The setting of the two bushings enables the bushings to abut against the lifting sling during the lifting of the lifting sling, thereby preventing the present invention from flipping due to the pulling of the lifting sling.

[0006] Preferably, a cavity recessed toward the take-up shaft is formed on the end face of the housing away from the take-up shaft. A plurality of spline grooves evenly distributed circumferentially with the cavity axis as the center are formed on the side wall of the cavity. A plurality of splines evenly distributed circumferentially with the fixed wheel axis as the center are fixed on the outer periphery of the fixed wheel. The fixed wheel is connected to the cavity through the sliding fit of the splines and the spline grooves.

[0007] Through the above technical solution, when the splines are inserted into the spline grooves, the fixed wheel is fixedly connected to the housing, and the fixed wheel rotates with the housing. When the splines are disengaged from the spline grooves, the fixed wheel is disengaged from the housing, and then the fixed wheel and the housing can rotate relative to each other, so as to facilitate the reverse rotation of the take-up shaft, so that the lifting belt can be reversed and loosened from the two take-up shafts.

[0008] Preferably, a circular through cavity communicating with the cavity is formed on the end face of the housing close to the take-up shaft. The diameter of the circular through cavity is smaller than the diameter of the fixed wheel and larger than the length of the connecting piece.

[0009] Through the above technical solution, the bottom wall of the circular through cavity blocks the fixed wheel to ensure that the fixed wheel is stably installed in the cavity.

[0010] Preferably, a wheel groove recessed toward the take-up shaft is formed on the end face of the fixed wheel away from the take-up shaft. The one-way wheel is rotatably connected in the wheel groove, and the connecting piece penetrates through the bottom wall of the wheel groove.

[0011] Through the above technical solution, the bottom wall of the wheel groove blocks the one-way wheel to ensure that the one-way wheel is stably installed in the wheel groove.

[0012] Preferably, a plurality of spring cavities evenly distributed circumferentially with the wheel groove axis as the center and communicating with the wheel groove are formed in the side wall of the wheel groove. The one-way limit pin is slidably connected in the spring cavity. A spring is fixed between the one-way limit pin and the bottom wall of the spring cavity. The bottom wall of the one-way groove consists of a limiting surface and a pushing surface in a "V" shape. When the one-way limit pin abuts against the bottom wall of the one-way groove, the limiting surface is parallel to the sliding direction of the one-way limit pin, and the pushing surface is perpendicular to the sliding direction of the one-way limit pin.

[0013] Through the above technical solution, when the rotation direction of the one-way wheel is the same as the direction in which the limiting surface is away from the one-way limit pin, the one-way wheel and the fixed wheel rotate relative to each other. When the rotation direction of the one-way wheel is the same as the direction in which the limiting surface is close to the one-way limit pin, due to the blocking of the one-way limit pin, the one-way wheel and the fixed wheel cannot rotate relative to each other.

[0014] Preferably, a plurality of threaded holes are formed on the side surface of the fixed wheel away from the tape winding shaft, a cover plate is arranged on the side of the fixed wheel away from the tape winding shaft, through holes penetrating through its thickness are formed on the cover plate, the threaded holes correspond to the through holes on the cover plate one by one, fixing bolts are threadedly connected in the threaded holes, and the cover plate and the fixed wheel are detachably fixed through the threaded connection between the fixing bolts and the threaded holes.

[0015] Through the above technical solution, the setting of the cover plate further restricts the one-way wheel in the wheel groove.

[0016] Preferably, a screw rod is arranged through the shaft sleeve, round holes are formed at the ends of the support rods, the two screw rods respectively penetrate through the two round holes on the corresponding sides, the end of the shaft sleeve abuts against the two adjacent support rods, a limiting plate is fixed at one end of the screw rod, the limiting plate abuts against the side surface of the support rod away from the shaft sleeve, and a nut is threadedly connected to the other end of the shaft sleeve, and the nut abuts against the other side surface of the support rod away from the shaft sleeve.

[0017] Through the above technical solution, the setting of the shaft sleeve can be used to support the two brackets, and the limiting plate and the nut cooperate to clamp the two brackets, so as to ensure that the distance between the two brackets is fixed.

[0018] Preferably, a baffle is arranged on the side of the support rod away from the tape winding shaft, two reinforcing ribs which are symmetric up and down and arranged along the length direction of the support rod are fixed between the support rod and the baffle, and a cover is fitted at one end of the cavity away from the tape winding shaft.

[0019] Through the above technical solution, the setting of the reinforcing ribs and the baffle can effectively increase the bending resistance of the support rod.

[0020] The beneficial effects of the present invention are as follows: The lifting belt passes through between the two tape winding shafts, and the two tape winding shafts are rotated so that the lifting belt is wound around the outer peripheries of the two tape winding shafts, thereby shortening the length of the lifting belt. The one-way wheel and the fixed wheel can only rotate in one direction, ensuring that after the two tape winding shafts wind the lifting belt, the length of the lifting belt can be kept fixed during the lifting process. The setting of the two shaft sleeves enables the shaft sleeves to abut against the lifting belt during the lifting of the lifting belt, thereby preventing the present invention from flipping due to the pulling of the lifting belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural view of the present invention; Figure 2 is an exploded view of the present invention; Figure 3 is a schematic structural view of the one-way wheel and the fixed wheel of the present invention; Figure 4 is a connection schematic view of the one-way wheel and the fixed wheel of the present invention; Figure 5 is the present inventionFigure 4 Enlarged schematic view of part A.

[0022] In the figure: 10. Housing; 101. Cavity; 102. Spline groove; 103. Circular through cavity; 11. Rod; 12. Cover; 13. Reinforcing rib; 14. Baffle; 20. Tape winding shaft; 21. Connector; 22. Central shaft; 30. Bush; 31. Limiting plate; 32. Nut; 33. Screw; 40. Fixed wheel; 401. Wheel groove; 402. Threaded hole; 403. Spline; 404. Spring cavity; 41. One-way wheel; 411. One-way groove; 4111. Limiting surface; 4112. Pushing surface; 42. Cover plate; 43. Fixed bolt; 44. One-way limiting pin; 45. Spring. Specific embodiments

[0023] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the attached Figure 1 shown orientation or positional relationship, and are only for the convenience of simplifying the description of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0024] In order to make the purpose and advantages of the present invention clearer, the present invention will be specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection specifically claimed by the present invention. As used herein, the terms "upper and lower" and "left and right" are not limited to their strict geometric definitions, but include tolerances for machining or human errors that are reasonable and inconsistent. The specific features of the hoisting belt length adjusting device will be described in detail below: An embodiment of the present invention: Refer to Figures 1-5, the present invention provides a device for adjusting the length of a lifting belt, which includes two symmetrically arranged brackets. A winding assembly for winding the lifting belt is rotatably arranged between the two brackets. A detachable bushing 30 is fixed between the two brackets. The bracket includes a housing 10 and rod-shaped members 11 symmetrically fixed on the outer periphery of the housing 10. A fixed wheel 40 is slidably connected inside the housing 10. A one-way wheel 41 is rotatably connected inside the fixed wheel 40. A plurality of circumferentially uniformly distributed one-way grooves 411 are formed on the outer periphery of the one-way wheel 41. A plurality of one-way limit pins 44 that abut against the bottom walls of the one-way grooves 411 are slidably connected inside the fixed wheel 40, so that the one-way wheel 41 and the fixed wheel 40 can only rotate in one direction. The winding assembly includes two winding shafts 20 symmetrically arranged with the axis of the one-way wheel 41 as the center. Both ends of the winding shaft 20 are rotatably connected with connecting members 21. A central shaft 22 that coincides with the axis of the one-way wheel 41 is fixed on the connecting member 21. The central shaft 22 is fixed at the center of the circle of the one-way wheel 41.

[0025] Refer to Figure 2 , Figure 3 , a cavity 101 that is recessed towards the winding shaft 20 is formed on the end face of the housing 10 away from the winding shaft 20. A plurality of spline grooves 102 that are circumferentially uniformly distributed with the axis of the cavity 101 as the center are formed on the side wall of the cavity 101. The length of the spline groove 102 in the axial direction of the housing 10 is half of the depth of the cavity 101. A plurality of splines 403 that are circumferentially uniformly distributed with the axis of the fixed wheel 40 as the center are fixed on the outer periphery of the fixed wheel 40. The fixed wheel 40 and the cavity 101 are connected by the sliding fit of the splines 403 and the spline grooves 102.

[0026] Refer to Figure 2 , a circular through cavity 103 that communicates with the cavity 101 is formed on the end face of the housing 10 close to the winding shaft 20. The diameter of the circular through cavity 103 is smaller than the diameter of the fixed wheel 40 and larger than the length of the connecting member 21.

[0027] Refer to Figure 2 , Figure 3 , a wheel groove 401 that is recessed towards the winding shaft 20 is formed on the end face of the fixed wheel 40 away from the winding shaft 20. The one-way wheel 41 is rotatably connected inside the wheel groove 401. The connecting member 21 penetrates through the bottom wall of the wheel groove 401.

[0028] Refer to Figures 3-5, a plurality of spring cavities 404 are formed in the side wall of the wheel groove 401, which are circumferentially and uniformly distributed around the axis of the wheel groove 401 and communicate with the wheel groove 401. The one-way limit pin 44 is slidably connected in the spring cavity 404, and a spring 45 is fixed between the one-way limit pin 44 and the bottom wall of the spring cavity 404. The bottom wall of the one-way groove 411 is composed of a limiting surface 4111 and a pushing surface 4112 to form a "V" shape. When the one-way limit pin 44 abuts against the bottom wall of the one-way groove 411, the limiting surface 4111 is parallel to the sliding direction of the one-way limit pin 44, and the pushing surface 4112 is perpendicular to the sliding direction of the one-way limit pin 44.

[0029] Referring to Figure 3 , a plurality of threaded holes 402 are formed in the side surface of the fixed wheel 40 away from the winding shaft 20. A cover plate 42 is arranged on the side of the fixed wheel 40 away from the winding shaft 20. Through holes penetrating along its thickness are formed in the cover plate 42. The threaded holes 402 correspond to the through holes in the cover plate 42 one by one. Fixing bolts 43 are threadedly connected in the threaded holes 402. The cover plate 42 and the fixed wheel 40 are detachably fixed by the threaded connection between the fixing bolts 43 and the threaded holes 402.

[0030] Referring to Figure 2 , a screw rod 33 is arranged through the sleeve 30. Round holes are formed at the ends of the support rods 11. The two screw rods 33 respectively penetrate through the two round holes on the corresponding sides. The end of the sleeve 30 abuts against the two adjacent support rods 11. A limiting plate 31 is fixed at one end of the screw rod 33. The limiting plate 31 abuts against the side surface of the support rod 11 away from the sleeve 30. A nut 32 is threadedly connected to the other end of the sleeve 30. The nut 32 abuts against the other side surface of the support rod 11 away from the sleeve 30.

[0031] Referring to Figure 2 , a baffle 14 is arranged on the side of the support rod 11 away from the winding shaft 20. Two reinforcing ribs 13 which are symmetric up and down and arranged along the length direction of the support rod 11 are fixed between the support rod 11 and the baffle 14. A cover 12 is fitted at one end of the cavity 101 away from the winding shaft 20.

[0032] When the present invention is in use, the lifting belt is passed through the two winding shafts 20, and at the same time, it is ensured that the two sleeves 30 are respectively located on both sides of the lifting belt.

[0033] When it is necessary to shorten the length of the lifting belt, the two winding shafts 20 are rotated so that the lifting belt is wound around the two winding shafts 20, thereby shortening the length of the lifting belt.

[0034] Then, when the shortened lifting belt is used for lifting, during the pulling process of the lifting belt, a tendency of the present invention to turn over is generated. Since the sleeve 30 abuts against the lifting belt, the present invention and the lifting belt remain relatively stationary.

[0035] After the hoisting operation is completed, rotate the nut 32 to remove the nut 32 from the screw rod 33, and then remove the screw rod 33 from the bushing 30, so as to facilitate the removal of the bushing 30 from between the two brackets. At this time, the two brackets can be pressed towards the direction close to the winding shaft 20, so that the spline 403 disengages from the spline groove 102, which enables the fixed wheel 40 and the housing 10 to rotate relative to each other. At this time, pull the hoisting belts on both sides of the winding shaft 20 with both hands, and the winding shaft 20 will reverse under the pull of the hoisting belts until the two winding shafts 20 are disengaged from the winding state of the hoisting belts, so as to facilitate the separation of the present invention from the hoisting belts.

[0036] Those skilled in the art can clearly understand that various modifications to the above embodiments can be made without departing from the general spirit and concept of the present invention. All of them fall within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims appended hereto.

Claims

1. A lifting belt length adjustment device, characterized in that: The invention comprises two symmetrically arranged brackets, a winding assembly for winding a lifting belt is rotatably arranged between the two brackets, a detachable shaft sleeve (30) is fixed between the two brackets, the bracket comprises a shell (10) and a frame rod (11) fixedly arranged on the outer periphery of the shell (10) and symmetrically arranged, a fixed wheel (40) is slidably connected inside the shell (10), a one-way wheel (41) is rotatably connected inside the fixed wheel (40), a plurality of one-way grooves (411) uniformly distributed in the circumferential direction are opened on the outer periphery of the one-way wheel (41), and the A plurality of one-way limiting pins (44) are slidably connected in the fixed wheel (40) and abut against the bottom wall of the one-way groove (411), so that the one-way wheel (41) and the fixed wheel (40) can only rotate in one direction. The winding assembly comprises two tape winding shafts (20) symmetrically arranged with the axis of the one-way wheel (41) as the center. Both ends of the tape winding shafts (20) are rotatably connected to connecting members (21). A central shaft (22) coinciding with the axis of the one-way wheel (41) is fixed on the connecting member (21). The central shaft (22) is fixed at the center of the one-way wheel (41).

2. A lifting belt length adjustment device according to claim 1, characterized in that: A cavity (101) is provided on an end surface of one side of the housing (10) away from the tape reel shaft (20) and is recessed in a direction close to the tape reel shaft (20); a plurality of spline grooves (102) are provided on a side wall of the cavity (101) and are evenly distributed in a circumferential direction with the axis of the cavity (101) as the center; a plurality of splines (403) are fixedly provided on the outer circumference of the fixed wheel (40) and are evenly distributed in a circumferential direction with the axis of the fixed wheel (40) as the center; the fixed wheel (40) and the cavity (101) are connected by sliding fit between the splines (403) and the spline grooves (102).

3. A lifting belt length adjustment device according to claim 2, characterized in that: A circular through cavity (103) communicating with the cavity (101) is formed on one end surface of the housing (10) close to the tape reel shaft (20); the diameter of the circular through cavity (103) is smaller than the diameter of the fixed wheel (40) and larger than the length of the connecting piece (21).

4. A lifting belt length adjustment device according to claim 1, characterized in that: A wheel groove (401) is formed on the end surface of the fixed wheel (40) away from the tape reel shaft (20), the wheel groove (401) being recessed in a direction close to the tape reel shaft (20); the one-way wheel (41) is rotatably connected in the wheel groove (401); and the connecting member (21) passes through the bottom wall of the wheel groove (401).

5. A lifting belt length adjustment device according to claim 4, characterized in that: A plurality of spring cavities (404) are provided in the side wall of the wheel groove (401), which are evenly distributed circumferentially around the axis of the wheel groove (401) and communicated with the wheel groove (401); the one-way stop pin (44) is slidably connected in the spring cavity (404); a spring (45) is fixed between the one-way stop pin (44) and the bottom wall of the spring cavity (404); the bottom wall of the one-way groove (411) is formed into a "V" shape by a stop surface (4111) and a push surface (4112); when the one-way stop pin (44) abuts against the bottom wall of the one-way groove (411), the stop surface (4111) is parallel to the sliding direction of the one-way stop pin (44), and the push surface (4112) is perpendicular to the sliding direction of the one-way stop pin (44).

6. A lifting belt length adjustment device according to claim 5, characterized in that: A plurality of threaded holes (402) are provided on a side of the fixing wheel (40) away from the tape reel shaft (20); a cover plate (42) is provided on the side of the fixing wheel (40) away from the tape reel shaft (20); a through hole is provided on the cover plate (42) penetrating along the thickness thereof; the threaded holes (402) correspond to the through holes on the cover plate (42) in a one-to-one manner; a fixing bolt (43) is connected to the inner thread of the threaded hole (402); and the cover plate (42) and the fixing wheel (40) are detachably fixed by means of the threaded connection between the fixing bolt (43) and the threaded hole (402).

7. A lifting belt length adjustment device according to claim 1, characterized in that: A screw rod (33) is provided through the shaft sleeve (30), and circular holes are provided at the ends of the frame rod (11). The two screw rods (33) respectively pass through the two circular holes on the corresponding sides, and the ends of the shaft sleeve (30) abut against two adjacent frame rods (11). A limiting plate (31) is fixed to one end of the screw rod (33), and the limiting plate (31) abuts against a side surface of the frame rod (11) away from the shaft sleeve (30). A nut (32) is threadedly connected to the other end of the shaft sleeve (30), and the nut (32) abuts against the other side surface of the frame rod (11) away from the shaft sleeve (30).

8. A lifting belt length adjustment device according to claim 2, characterized in that: A baffle (14) is provided on the side of the frame rod (11) away from the tape reel (20), two reinforcing ribs (13) are fixedly provided between the frame rod (11) and the baffle (14) and are symmetrical in the vertical direction and arranged along the length direction of the frame rod (11), and a cover (12) is embedded in one end of the cavity (101) away from the tape reel (20).

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