On-load lifting device

Abstract

The invention belongs to the technical field of power line operation and maintenance operation equipment, and discloses an on-load lifting device. The on-load lifting device comprises a rope; a housing; the driving assembly is installed on the machine shell, the driving assembly comprises a driving source and a driving wheel, the driving source can drive the driving wheel to rotate, and a rope winding groove allowing a rope to be wound is formed in the driving wheel; the two guide wheel assemblies are arranged on the upper side and the lower side of the driving wheel respectively, each guide wheel assembly comprises a guide wheel base, a guide wheel and an insertion tongue, the guide wheel bases are connected with the machine shell, the guide wheels are rotatably installed on the guide wheel bases, rope penetrating spaces are formed between the guide wheels and the guide wheel bases, the insertion tongues are connected with the guide wheel bases, the insertion tongues and the guide wheels are located on the two sides of the rope penetrating spaces respectively, and the insertion tongues are inserted into the rope winding grooves. The rope is prevented from being clamped and wound between the driving wheel and the guide wheel, so that the on-load lifting device cannot ascend and descend, the stability of up-down movement of the on-load lifting device is guaranteed, and the safety of tower climbing operation and the operation efficiency of power line operation and maintenance are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power line operation and maintenance equipment, and in particular to a load-carrying lifting device. Background Art

[0002] With the increasing scale of power transmission, the workload of power line operation and maintenance is increasing year by year. In the field of power line operation and maintenance, tower climbing and high-altitude operations have become a pain point in daily power operation and maintenance due to their high labor intensity and physical exertion. At present, the commonly used load-carrying lifting devices for large iron towers above 150 meters are shaft elevators, construction elevators, and iron tower climbing machines, which are too expensive, have large installation volumes, poor portability, are difficult to maintain, and have low cost-performance ratio.

[0003] The rope-type load-carrying lifting device is a relatively low-cost and relatively portable load-carrying lifting device, which includes a wheel train assembly and a rope, wherein the wheel train assembly includes a driving wheel, a first guide wheel and a second guide wheel, and the rope is wound around the first guide wheel, the driving wheel and the second guide wheel in sequence. When the driving wheel rotates, it drives the entire wheel train assembly and the load connected to the wheel train assembly to move along the rope through friction with the rope, so as to assist the operator to carry heavy objects to climb the tower. In the prior art, due to the large friction between the rope and the driving wheel, the rope may not be separated from the driving wheel in time, and may be sandwiched and entangled between the driving wheel and the guide wheel, thereby causing the inability to lift, which not only brings great safety hazards to the tower climbing operation, but also reduces the efficiency of power line operation and maintenance.

[0004] Therefore, there is an urgent need for a load-carrying lifting device to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a load-carrying lifting device, which can prevent the rope clamp from being entangled between the driving wheel and the guide wheel, ensure the stability of the up and down movement of the load-carrying lifting device, and improve the safety of tower climbing operations and the operating efficiency of power line operation and maintenance.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A load lifting device, comprising:

[0008] rope;

[0009] chassis;

[0010] A driving assembly is mounted on the housing, the driving assembly comprising a driving source and a driving wheel, the driving source can drive the driving wheel to rotate, and the driving wheel is provided with a rope winding groove for winding the rope;

[0011] Two sets of guide wheel assemblies are respectively arranged on the upper and lower sides of the driving wheel. The guide wheel assembly includes a guide wheel seat, a guide wheel and an insertion tongue. The guide wheel seat is connected to the casing. The guide wheel is rotatably mounted on the guide wheel seat and a rope threading space is formed between the guide wheel seat and the guide wheel. The insertion tongue is connected to the guide wheel seat and is located on both sides of the rope threading space with the guide wheel respectively. The insertion tongue is inserted into the rope winding groove.

[0012] Preferably, the distance between one end of the inserting tongue extending into the rope winding groove and the bottom surface of the rope winding groove is less than or equal to half of the diameter of the rope.

[0013] Preferably, the rope threading space above the driving wheel, the center of the driving wheel and the rope threading space below the driving wheel are arranged in a vertical direction.

[0014] Preferably, the two guide wheels are tangent to the driving wheel.

[0015] Preferably, the guide wheel assembly further comprises:

[0016] A rotating shaft is mounted on the housing, and the guide wheel seat is rotatably matched with the rotating shaft so that the guide wheel can approach or move away from the driving wheel;

[0017] The locking piece can penetrate the guide wheel seat and be connected to the housing to lock the guide wheel seat at a position where the guide wheel is close to the driving wheel.

[0018] Preferably, the cross section of the rope winding groove is trapezoidal or V-shaped.

[0019] Preferably, the rope winding groove comprises a first side wall and a second side wall which are arranged opposite to each other, and a friction adjusting member is protruded from both the first side wall and the second side wall.

[0020] Preferably, a plurality of the friction adjustment members are evenly distributed along the circumferential direction on the first side wall, a plurality of the friction adjustment members are evenly distributed along the circumferential direction on the second side wall, and the friction adjustment members on the first side wall and the friction adjustment members on the second side wall are arranged alternately.

[0021] Preferably, the belt-loaded lifting device further comprises a pressure wheel assembly, which is mounted on the casing, and the pressure wheel assembly can be close to or away from the driving wheel, and the pressure wheel assembly is configured to press the rope into the rope winding groove.

[0022] Preferably, the load-carrying lifting device also includes a counterweight block, one end of the rope is fixed, and the other end is successively wound around the guide wheel located above the driving wheel, the driving wheel, and the guide wheel located below the driving wheel and then connected to the counterweight block.

[0023] Beneficial effects:

[0024] The present invention provides a load-carrying lifting device. When in use, the upper end of the rope is fixed, and the lower end is sequentially inserted into the rope threading space of the guide wheel assembly arranged on the upper side of the driving wheel, the rope winding groove arranged around the driving wheel, and the rope threading space of the guide wheel assembly arranged on the lower side of the driving wheel. When the driving source drives the driving wheel to rotate, under the action of friction, the driving assembly, the guide wheel assembly and the casing move along the rope as a whole. Since the inserting tongue extends into the rope winding groove on the side away from the driving wheel around which the rope is wound, the rope can be prevented from sticking to the driving wheel due to excessive friction when moving from the driving wheel to the rope threading space, thereby preventing the rope from being clamped and entangled between the driving wheel and the guide wheel, which causes the load-carrying lifting device to be unable to rise and fall, thereby ensuring the stability of the overall up and down movement of the load-carrying lifting device, and improving the safety of tower climbing operations and the operating efficiency of power line operation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of a load-carrying lifting device provided in an embodiment of the present invention;

[0026] Figure 2 is a schematic diagram of a guide wheel assembly provided in an embodiment of the present invention;

[0027] Figure 3 is a schematic diagram of the force condition of a gear train provided by an embodiment of the present invention;

[0028] Figure 4 is a first schematic diagram of a driving wheel provided in an embodiment of the present invention;

[0029] Figure 5 is a second schematic diagram of a driving wheel provided in an embodiment of the present invention;

[0030] Figure 6 is a schematic diagram of a pressure wheel assembly provided in an embodiment of the present invention;

[0031] Figure 7 is an exploded view of a pressure wheel assembly provided in an embodiment of the present invention;

[0032] Figure 8 is a first schematic diagram of the force condition of the driving wheel provided by an embodiment of the present invention;

[0033] Fig. 9 This is a second schematic diagram of the force condition of the driving wheel provided in an embodiment of the present invention.

[0034] In the figure:

[0035] 1. Tower foot nails; 2. Lifting rings; 3. Ropes; 4. Counterweights;

[0036] 5. Casing; 51. Installation room;

[0037] 6. Guide wheel assembly; 61. Guide wheel; 62. Guide wheel shaft; 63. Guide wheel seat; 64. Insert tongue; 65. Locking piece; 66. Rotating shaft; 67. Circlip; 68. Guide wheel groove; 69. Rope threading space;

[0038] 631, main body; 632, support part;

[0039] 7. driving assembly; 71. driving wheel; 72. first fastener; 73. driving wheel shaft;

[0040] 711, first cover plate; 7111, first side wall;

[0041] 712, second cover plate; 7121, second side wall; 7122, through hole;

[0042] 713. Rope winding groove; 714. Friction adjustment member;

[0043] 8. Pressure wheel assembly; 81. Rope pressure roller; 82. Roller cover; 83. Sliding bow; 84. Second fastener; 85. Roller shaft; 86. Through hole; 87. Groove. DETAILED DESCRIPTION

[0044] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0045] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0047] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0048] The present invention provides a load-carrying lifting device, such as Figure 1-Figure 2 As shown, the loaded lifting device includes a rope 3, a counterweight 4, a housing 5, a driving assembly 7 and a guide wheel assembly 6. The driving assembly 7 is mounted on the housing 5, and the driving assembly 7 includes a driving source and a driving wheel 71. The driving source can drive the driving wheel 71 to rotate, and the driving wheel 71 is provided with a rope winding groove 713 for the rope 3 to be wound around; two groups of guide wheel assemblies 6 are respectively arranged on the upper and lower sides of the driving wheel 71, and the guide wheel assembly 6 includes a guide wheel seat 63, a guide wheel 61 and a plug tongue 64. The guide wheel seat 63 is connected to the housing 5, and the guide wheel 61 is rotatably mounted on the guide wheel seat 63 and forms a rope threading space 69 with the guide wheel seat 63. The plug tongue 64 is connected to the guide wheel seat 63, and is located on both sides of the rope threading space 69 with the guide wheel 61, and the plug tongue 64 is inserted into the rope winding groove 713. The upper end of the rope 3 is fixed, and the lower end passes through the rope winding space 69 located above the driving wheel 71, and is wound in sequence through the guide wheel 61 located above the driving wheel 71, the driving wheel 71, the guide wheel 61 located below the driving wheel 71, and then passes through the rope winding space 69 located below the driving wheel 71, and the end is connected to the counterweight 4. The counterweight 4 is used to tighten the rope 3 to facilitate the up and down movement of the wheel system along the rope 3.

[0049] When the loaded lifting device is working, the driving source drives the driving wheel 71 to rotate. Under the friction between the driving wheel 71 and the rope 3, the driving assembly 7, the guide wheel assembly 6 and the housing 5 move along the rope 3 as a whole, thereby realizing the loaded operation. It can prevent the rope 3 from sticking to the driving wheel 71 due to excessive friction when it moves from the driving wheel 71 to the rope threading space 69, thereby preventing the rope 3 from being clamped and entangled between the driving wheel 71 and the guide wheel 61, causing the loaded lifting device to be unable to rise and fall. The system composed of the driving wheel 71 and the guide wheel 61 arranged on the upper and lower sides of the driving wheel 71 is a wheel train. The way in which the tongue 64 is inserted into the rope winding groove 713 ensures the stability of the overall wheel train moving up and down along the rope 3, thereby improving the safety of tower climbing operations and the efficiency of power line operation and maintenance.

[0050] In this embodiment, the upper end of the rope 3 is connected to the lifting ring 2, and the lifting ring 2 is suspended on the tower foot nail 1, so as to facilitate the installation and removal of the load lifting device. The driving source can be an assembly composed of a motor and a reducer.

[0051] like Figure 1As shown, the housing 5 includes an installation chamber 51, the drive assembly 7 and the guide wheel assembly 6 are arranged in the installation chamber 51, and the top and bottom of the installation chamber 51 are provided with avoidance holes for passing the rope 3. It can be understood that the housing 5 can also include a load chamber (not shown in the figure), which is used to accommodate the load-bearing operator and / or heavy objects.

[0052] like Figure 1-Figure 2 As shown, the guide wheel assembly 6 is mirror-imaged on the upper and lower sides of the driving wheel 71. Specifically, the guide wheel seat 63 includes a main body 631 and two support parts 632. The two support parts 632 are connected to the main body 631 and are arranged opposite to each other in the horizontal direction. The guide wheel assembly 6 also includes a guide wheel shaft 62, and the two ends of the guide wheel shaft 62 are respectively connected to the two support parts 632. In this embodiment, the two ends of the guide wheel shaft 62 are respectively penetrated by the two support parts 632, and the guide wheel assembly 6 also includes a retaining spring 67, which is engaged with the part of the guide wheel shaft 62 that passes through the support parts 632, thereby limiting the guide wheel shaft 62 in the axial direction to prevent the guide wheel shaft 62 from being separated from the guide wheel seat 63. The guide wheel 61 is sleeved on the guide wheel shaft 62 so that the guide wheel 61 can be rotatably mounted on the guide wheel seat 63. The guide wheel 61 is provided with a guide wheel groove 68 for the rope 3 to be wound around, and a rope threading space 69 is formed between the guide wheel groove 68 and the main body 631 to allow the rope 3 to be smoothly wound around the rope winding groove 713 .

[0053] like Figure 2 As shown, in this embodiment, the tongue 64 is connected to the main body 631 so that the guide wheel 61 and the tongue 64 are respectively located on both sides of the rope threading space 69, and the tongue 64 extends into the rope winding groove 713 on the side away from the driving wheel 71 around which the rope 3 is wound.

[0054] The distance between the end of the tongue 64 extending into the rope winding groove 713 and the bottom surface of the rope winding groove 713 is less than or equal to half the diameter of the rope 3. This arrangement ensures that the tongue 64 can effectively contact the rope 3 and shovel the rope 3 off the driving wheel 71, thereby effectively preventing the rope 3 from sticking to the driving wheel 71 due to excessive friction, and further preventing the rope 3 from being clamped and entangled between the driving wheel 71 and the guide wheel 61.

[0055] like Figure 1 and Figure 3 As shown, the rope threading space 69 of the guide wheel assembly 6 located above the driving wheel 71, the center of the driving wheel 71, and the rope threading space 69 of the guide wheel assembly 6 located below the driving wheel 71 are arranged in the vertical direction. This arrangement ensures that the rope 3 extends in the vertical direction as a whole and passes through the geometric center of the driving wheel 71, so that the load-carrying lifting device is evenly stressed, thereby ensuring the stability of the load-carrying lifting device.

[0056] like Figure 1 and Figure 3As shown, both guide wheels 61 are tangent to the driving wheel 71. With such a configuration, on the basis of ensuring the vertical extension of the rope 3, the wrap angle between the rope 3 and the driving wheel 71 is as large as possible, that is, the contact area between the rope 3 and the driving wheel 71 is increased, thereby increasing the friction force of the rope 3 on the driving wheel 71, which can not only prevent the slippage between the rope 3 and the driving wheel 71, but also help to increase the maximum load of the load-carrying lifting device. In this embodiment, the wrap angle between the rope 3 and the driving wheel 71 is (180°-2α), where α is the angle between the line connecting the center of the guide wheel 61 and the center of the main drive wheel 71 and the vertical direction.

[0057] Based on the above arrangement, the guide wheel 61, the driving wheel 71 and the rope threading space 69 are compactly structured, thereby increasing the difficulty of threading the rope 3. Figure 1 and Figure 2 As shown, the guide wheel assembly 6 also includes a rotating shaft 66 and a locking member 65. The rotating shaft 66 is mounted on the housing 5. The guide wheel seat 63 rotates with the rotating shaft 66 to enable the guide wheel 61 to approach or move away from the driving wheel 71. Of course, the inserting tongue 64 and the rope threading space 69 can move away from the driving wheel 71 together, so that the rope 3 can smoothly pass through the rope threading space 69 and be wound in the rope winding groove 713. The locking member 65 can pass through the guide wheel seat 63 and be connected to the housing 5 to lock the guide wheel seat 63 at a position where the guide wheel 61 is close to the driving wheel 71. When it is necessary to thread the rope, the locking member 65 is removed, and the guide wheel seat 63 is rotated to make the guide wheel 61 and the rope threading space 69 move away from the driving wheel 71 as a whole, so as to prevent the inserting tongue 64 from affecting the rope 3 passing through the rope threading space 69 and winding around the driving wheel 71, so as to facilitate the rope 3 passing through the rope threading space 69 and winding around the driving wheel 71. After the rope is threaded, the tongue 64 is inserted into the rope winding groove 713, and the locking piece 65 is inserted into the guide wheel seat 63 to lock the guide wheel seat 63 so that the structure of the load lifting device is stable during operation.

[0058] In this embodiment, Figure 2 As shown, the first end of the rotating shaft 66 is connected to the housing 5, and the second end passes through the main body 631 of the guide wheel seat 63 and is located on the side of the guide wheel seat 63 away from the housing 5. The second end of the rotating shaft 66 is sleeved with a retaining spring 67, which abuts against the main body 631 to prevent the rotating shaft 66 from detaching from the guide wheel seat 63. The locking member 65 passes through the main body 631 of the guide wheel seat 63 and is connected to the housing 5 so that the guide wheel seat 63 is locked on the housing 5, thereby improving the structural stability of the load lifting device during operation. In some embodiments, the locking member 65 can be a threaded rod, a through hole is provided on the guide wheel seat 63, a blind hole is provided on the housing 5, an internal thread corresponding to the external thread of the threaded rod is provided on the inner wall of the blind hole, the threaded rod passes through the guide wheel seat 63 and is twisted into the blind hole to lock the guide wheel seat 63. In other embodiments, the locking member 65 can also be a latch, and a slot matching the latch is provided on the housing 5. The specific locking method is not limited here.

[0059] like Figure 4 As shown, the driving wheel 71 includes a first cover plate 711 and a second cover plate 712 that are symmetrically arranged. The first cover plate 711 and the second cover plate 712 are connected along the axial direction to form a rope winding groove 713, and the rope 3 can be wound in the rope winding groove 713. The driving wheel 71 is connected to the housing 5 through a driving wheel shaft 73, and the driving wheel shaft 73 is connected to the output end of the driving source. The driving source can drive the driving wheel shaft 73 to rotate, thereby driving the driving wheel 71 to rotate. Specifically, the driving assembly 7 also includes a first fastener 72. A plurality of through holes 7122 are provided on the driving wheel 71. The first fastener 72 penetrates the through holes 7122 and is connected to the flange portion of the driving wheel shaft 73. When the driving wheel shaft 73 rotates, the driving wheel 71 is driven to rotate, so that the wheel train moves along the rope 3.

[0060] like Figure 5 As shown, the cross section of the rope winding groove 713 is trapezoidal or V-shaped. Such a configuration can make the rope 3 closely attached to the side wall of the rope winding groove 713, increase the friction between the rope 3 and the rope winding groove 713, and prevent the rope 3 from slipping with the driving wheel 71. In this embodiment, the cross section of the rope winding groove 713 is trapezoidal, so that the rope 3 is in contact with the side wall of the rope winding groove 713, thereby increasing the degree of friction.

[0061] like Figure 4 and Figure 5 As shown, the rope winding groove 713 includes a first side wall 7111 and a second side wall 7121 that are arranged opposite to each other, and a friction adjusting member 714 is convexly provided on the first side wall 7111 and the second side wall 7121. The friction adjusting member 714 not only increases the contact area between the rope 3 and the rope winding groove 713, but also can squeeze the rope 3, thereby increasing the overall friction between the rope 3 and the entire driving wheel 71, and ensuring that the rope 3 and the driving wheel 71 do not slip.

[0062] like Figure 5 As shown, a plurality of friction adjusting members 714 are evenly distributed along the circumference on the first side wall 7111, and a plurality of friction adjusting members 714 are evenly distributed along the circumference on the second side wall 7121, and the friction adjusting members 714 on the first side wall 7111 and the friction adjusting members 714 on the second side wall 7121 are arranged alternately. This ensures that the rope 3 is tightly combined with the rope winding groove 713, the friction force is large enough, and the rope 3 and the driving wheel 71 do not slip.

[0063] Optionally, the cross-section of the friction adjusting member 714 may be trapezoidal, rectangular, etc. In this embodiment, the cross-section of the friction adjusting member 714 is rectangular, so that the contact area between the rope 3 and the friction adjusting member 714 is maximized. Other types of friction adjusting members 714 are not specifically limited here.

[0064] Optionally, the friction adjustment member 714 may be made of a rubber material, a powder metallurgy material, an asbestos-based material, a paper-based material, etc., which is not specifically limited herein.

[0065] like Figure 1 , Figure 6 and Figure 7 As shown, the loaded lifting device further includes a pressure wheel assembly 8, which is mounted on the housing 5. The pressure wheel assembly 8 can be close to or away from the driving wheel 71, and the pressure wheel assembly 8 is configured to press the rope 3 into the rope winding groove 713. During the process of arranging the rope 3, the pressure wheel assembly 8 can be translated as a whole and away from the driving wheel 71, so as to facilitate the rope 3 to pass through the rope winding groove 713; after the rope threading work is completed, the pressure wheel assembly 8 is translated as a whole and close to the driving wheel 71, contacts the rope 3, and presses the rope 3 into the rope winding groove 713 to prevent the rope 3 from escaping from the rope winding groove 713.

[0066] like Figure 6-Figure 7 As shown, a slide seat (not shown) is provided on the housing 5, and the pressing wheel assembly 8 includes a rope pressing roller 81, a sliding bow 83 and a roller shaft 85. The sliding bow 83 can slide on the slide seat, and one end of the roller shaft 85 is provided with the rope pressing roller 81 and is connected to the sliding bow 83, so that the rope pressing roller 81 is rotatably mounted on the sliding bow 83. When the sliding bow 83 slides along the slide seat, the rope pressing roller 81 can be inserted into the rope winding groove 713 and press the rope 3 to prevent the rope 3 from escaping from the rope winding groove 713. Of course, the pressing force of the rope pressing roller 81 on the rope 3 cannot be too large to avoid the rope 3 from getting stuck. When installing or removing the rope 3, the sliding bow 83 is made to slide in the opposite direction relative to the slide seat to make the rope pressing roller 81 away from the rope winding groove 713.

[0067] Optionally, the slide seat and the slide bow 83 can be connected by a guide rail slider structure, and the slide bow 83 can be locked in position by a locking workpiece at two positions close to the driving wheel 71 or away from the driving wheel 71. Specifically, the guide rail is installed on the slide seat, the slider is slidably connected to the guide rail, and a through hole 86 is provided at the end of the slide bow 83 away from the driving wheel 71, and the fastener can penetrate the through hole 86 and connect with the slider. When it is necessary to thread the rope 3, the pressure wheel assembly 8 slides along the guide rail away from the driving wheel 71 and is locked. When the threading of the rope 3 is completed, the pressure wheel assembly 8 is unlocked, and the pressure wheel assembly 8 slides along the guide rail close to the driving wheel 71 to a suitable position to press the rope 3 and lock it, which ensures the stability of the structure of the load lifting device while facilitating the threading of the rope.

[0068] In this embodiment, Figure 6 and Figure 7 As shown, a groove 87 is provided on the slide bow 83, and part of the rope pressing roller 81 is located in the groove 87. The pressure roller assembly 8 also includes a roller cover 82, which is covered in the groove 87, and a roller shaft 85 passes through the rope pressing roller 81, and one end is connected to the roller cover 82, and the other end is connected to the slide bow 83. The cross-sectional area of ​​the roller cover 82 is larger than the cross-sectional area of ​​the groove 87, and is fixed to the slide bow 83 by a second fastener 84, so as to prevent the rope pressing roller 81 from being separated from the slide bow 83, thereby improving the stability of the overall structure of the pressure roller assembly 8.

[0069] In this embodiment, the roller cover 82 and the sliding bow 83 are both provided with an arc surface concentric with the driving wheel 71 at one end thereof facing the driving wheel 71, and the arc surface is used to prevent the pressure wheel assembly 8 from interfering with the driving wheel 71. When the pressure wheel assembly 8 presses the rope 3, the arc surface maintains a certain gap with the driving wheel 71, and the gap is smaller than the diameter of the rope 3, so as to prevent the rope 3 from being separated from the rope winding groove 713, thereby improving the reliability of the operation of the load lifting device.

[0070] In this embodiment, two rope pressing rollers 81 are provided, and correspondingly, two grooves 87 are provided on the roller cover 82 and the slide bow 83, so as to control the movement path of the rope 3 to a greater extent and prevent the rope 3 from being separated from the rope winding groove 713 during the operation of the load lifting device. In other embodiments, one, three, four, etc. rope pressing rollers 81 can be provided, and correspondingly, the number of the roller cover 82 and the groove 87 is consistent with the number of the rope pressing rollers 81.

[0071] In this embodiment, four second fasteners 84 are provided on each roller cover 82, that is, eight second fasteners 84 are provided on the pressing wheel assembly 8 to achieve structural stability of the pressing wheel assembly 8. Optionally, two, three, five, etc. second fasteners 84 can be provided, as long as the structural stability of the pressing wheel assembly 8 can be achieved.

[0072] In summary, the operation process of using the load lifting device is roughly as follows:

[0073] (1) Fix one end of the rope 3 to the tower foot nail 1;

[0074] (2) Rotate the guide wheel seat 63 located above the driving wheel 71 so that the guide wheel 61 and the rope threading space 69 on the guide wheel seat 63 are away from the driving wheel 71, and the rope 3 passes through the rope threading space 69 and winds around the guide wheel 61. Rotate the guide wheel seat 63 to reset so that the guide wheel 61 is tangent to the driving wheel 71, and the insert tongue 64 extends into the rope winding groove 713;

[0075] (3) Operate the pressure wheel assembly 8 and move away from the driving wheel 71, the rope 3 is wound around the driving wheel 71, and the pressure wheel assembly 8 is operated to reset;

[0076] (4) Rotate the guide wheel seat 63 located below the driving wheel 71 so that the guide wheel 61 and the rope threading space 69 on the guide wheel seat 63 are away from the driving wheel 71, and the rope 3 passes through the rope threading space 69 and winds around the guide wheel 61. Rotate the guide wheel seat 63 to reset so that the guide wheel 61 is tangent to the driving wheel 71, and the insert tongue 64 extends into the rope winding groove 713;

[0077] (5) Carrying people and / or heavy objects on the housing 5;

[0078] (6) Turn on the driving source to drive the driving wheel 71 to rotate. Under the action of the friction between the driving wheel 71 and the rope 3, the driving assembly 7, the guide wheel assembly 6 and the housing 5 move along the rope 3 as a whole.

[0079] Since the actual effective pulling force of the load-carrying lifting device is equal to the actual deadweight of the device plus the gravity of the load, reducing the actual deadweight of the device will reduce the load of the device, thereby improving the load-carrying capacity of the device. The effective radius of the driving wheel 71 determines the overall dimensions of the entire device, and thus determines the actual deadweight of the entire device. Therefore, reducing the effective radius of the driving wheel 71 within a certain range can reduce the actual deadweight of the entire device, thereby improving the utilization rate of the device.

[0080] like Figure 3 , Figure 8 and Fig. 9 As shown, in this embodiment, the parameter design of the gear train is roughly as follows:

[0081] (1) The belt load is G1, the device weight is G2, and the theoretical effective pulling force of the entire device is F'. The theoretical effective pulling force F' is equal to the sum of the belt load G1 and the device weight G2, that is, F' = G1 + G2. The required traction speed is v, and the mechanical efficiency is η. The driving source power P can be calculated according to the formula P = F'v / η;

[0082] (2) According to the formula T=9550P / n and the calculated driving source power P, the driving source torque T and the driving source rated speed n can be matched;

[0083] (3) The radius of the driving wheel 71 is R. Based on the driving source torque T being greater than or equal to the traction torque G1R and the driving source rated speed n being greater than or equal to 60v / R, the range of the theoretical effective radius R of the driving wheel 71 can be obtained. The actual effective radius R of the driving wheel 71 selects the minimum value within the range of the theoretical effective radius R. Then, based on the actual effective radius R of the driving wheel 71, the overall device structure and the actual device weight G2 are designed, and the actual effective pulling force F0 of the device is calculated. The actual effective pulling force F0 is equal to the sum of the belt load G1 and the actual device deadweight G2.

[0084] (4) The number of friction adjustment members 714 is denoted as N, and the height of the friction adjustment members 714 protruding from the surface of the rope winding groove 713 is denoted as s; a functional relationship between the friction force f of the driving wheel 71 and the gravity G3 of the counterweight 4 is established as follows:

[0085] F t =2G3cosα

[0086]

[0087]

[0088] FN3 =2G3sinβ

[0089]

[0090] f=μF N1 +F N2 +F N3

[0091] in,

[0092] like Figure 3 As shown, r is the effective radius of the guide wheel 61;

[0093] Ft is the equivalent pressure exerted by the rope 3 on the driving wheel 71;

[0094] α is the angle between the line connecting the center of the guide wheel 61 and the center of the main drive wheel 71 and the vertical direction;

[0095] like Figure 8 As shown, FN1 is the positive pressure on the first side wall 7111 of the trapezoidal rope winding groove 713 decomposed by Ft;

[0096] FN2 is the positive pressure on the second side wall 7121 of the trapezoidal roping groove 713 decomposed from Ft;

[0097] FN3 is the positive pressure exerted on the friction adjusting member 714 by the traction force of the rope 3 under the influence of the protruding height s of the friction adjusting member 714;

[0098] like Fig. 9 As shown, β is the angle between the traction direction of the rope 3 and the vertical axis under the influence of the protruding height s of the friction adjusting member 714;

[0099] L is the arc length of the fan-shaped area of ​​the friction adjustment member 714 within the distribution circle of the rope 3;

[0100] θ is the opening angle of the trapezoidal rope winding groove 713 .

[0101] (5) The design variable factors for the friction force f of the driving wheel 71 are obtained as follows:

[0102] f=F(μ,α,β,θ,s,N)G3

[0103] By correcting the parameters and the deadweight G3 of the counterweight 4, the friction force f of the driving wheel 71 and the actual effective pulling force F0 are balanced, and the relationship f≥F0 is satisfied.

[0104] like Figure 3As shown, reasonable design of matching parameters related to the driving wheel 71 and the load capacity, such as the effective radius R of the driving wheel 71, the angle θ of the trapezoidal rope groove 713, the protruding height s of the friction adjustment member 714 and the number N of the friction adjustment members 714, can increase the friction reliability between the wheel train and the rope 3 and prevent slippage between the wheel train and the rope 3.

[0105] like Figure 8-Figure 9 As shown, under the condition of equivalent positive pressure Ft of the rope 3, due to the existence of the friction adjustment member 714, Ft is equivalent to radial force and circumferential force. Both radial force and circumferential force will exert positive pressure Ft on the side wall surface of the trapezoidal rope winding groove 713 to increase the friction between the rope 3 and the driving wheel 71, thereby preventing slippage between the wheel system and the rope 3.

[0106] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A load lifting device, characterized in that: include: Rope (3); Housing (5); a driving assembly (7) mounted on the housing (5), the driving assembly (7) comprising a driving source and a driving wheel (71), the driving source being capable of driving the driving wheel (71) to rotate, the driving wheel (71) being provided with a rope winding groove (713) for winding the rope (3); Two groups of guide wheel assemblies (6) are respectively arranged on the upper and lower sides of the driving wheel (71), the guide wheel assembly (6) comprises a guide wheel seat (63), a guide wheel (61) and an insertion tongue (64), the guide wheel seat (63) is connected to the housing (5), the guide wheel (61) is rotatably mounted on the guide wheel seat (63) and a rope threading space (69) is formed between the guide wheel seat (63) and the guide wheel seat (63), the insertion tongue (64) is connected to the guide wheel seat (63), and is respectively located on both sides of the rope threading space (69) with the guide wheel (61), and the insertion tongue (64) is inserted into the rope winding groove (713).

2. The belt-load lifting device according to claim 1, characterized in that: The distance between one end of the inserting tongue (64) extending into the rope winding groove (713) and the bottom surface of the rope winding groove (713) is less than or equal to half the diameter of the rope (3).

3. The belt-load lifting device according to claim 1, characterized in that: The rope threading space (69) located above the driving wheel (71), the center of the driving wheel (71), and the rope threading space (69) located below the driving wheel (71) are arranged in a vertical direction.

4. The belt-load lifting device according to claim 3, characterized in that: The two guide wheels (61) are both tangent to the driving wheel (71).

5. The belt-load lifting device according to claim 1, characterized in that: The guide wheel assembly (6) further comprises: A rotating shaft (66) is mounted on the housing (5), and the guide wheel seat (63) is rotatably matched with the rotating shaft (66) so that the guide wheel (61) can be close to or away from the driving wheel (71); A locking member (65) can penetrate the guide wheel seat (63) and be connected to the housing (5) so as to lock the guide wheel seat (63) at a position where the guide wheel (61) is close to the driving wheel (71).

6. The belt-load lifting device according to any one of claims 1 to 5, characterized in that: The cross section of the rope winding groove (713) is trapezoidal or V-shaped.

7. The belt-load lifting device according to claim 6, characterized in that: The rope winding groove (713) comprises a first side wall (7111) and a second side wall (7121) which are arranged opposite to each other, and a friction adjustment member (714) is protruded from each of the first side wall (7111) and the second side wall (7121).

8. The belt-load lifting device according to claim 7, characterized in that: A plurality of the friction adjustment members (714) are evenly distributed along the circumferential direction on the first side wall (7111), and a plurality of the friction adjustment members (714) are evenly distributed along the circumferential direction on the second side wall (7121). The friction adjustment members (714) on the first side wall (7111) and the friction adjustment members (714) on the second side wall (7121) are arranged alternately.

9. The belt-load lifting device according to any one of claims 1 to 5, characterized in that: The belt-loaded lifting device also includes a pressure wheel assembly (8), which is mounted on the housing (5). The pressure wheel assembly (8) can be moved close to or away from the driving wheel (71), and the pressure wheel assembly (8) is configured to press the rope (3) into the rope winding groove (713).

10. The belt-load lifting device according to any one of claims 1 to 5, characterized in that: The load-carrying lifting device also includes a counterweight (4); one end of the rope (3) is fixed, and the other end is wound around the guide wheel (61) located above the driving wheel (71), the driving wheel (71), the guide wheel (61) located below the driving wheel (71) in sequence, and then connected to the counterweight (4).

Images