Rope protection device and lifting appliance

Abstract

The utility model discloses a rope protection device and a sling in the rope protection field, the device comprises a limit seat and a rolling limit mechanism, the limit seat is provided with a wire outlet hole for a rope to pass through, the rolling limit mechanism comprises a plurality of limit pipes, the limit pipes are rotatably installed on the limit seat, and a limit structure is defined by the plurality of limit pipes. The rope sequentially penetrates through the rope outlet hole and the limiting structure, so that the rope and the periphery of the rope outlet hole are kept in a non-contact state; in the moving process of the rope, the rope makes contact with at least one limiting pipe and drives the limiting pipes to rotate, and rolling friction is formed. Movement of the rope can be restrained, and therefore the effect of preventing the rope from being abraded is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of rope protection, in particular to a rope protection device and a sling. Background Art

[0002] In engineering practice, when starting a sling to load and unload an I-spool wrapped with steel wire, the rope of the sling (usually a steel wire rope) plays a load-bearing role, which is related to the safety of the sling.

[0003] The existing technology has shortcomings: the spreader wire rope and the black nylon stopper at the spreader outlet are subject to wear. Initially, a copper sleeve was added to the nylon sleeve, but after a period of use, the copper sleeve also began to wear. Due to the wear and tear between the wire rope, the black nylon stopper, and the copper sleeve, the wire rope is prone to breakage. If a break is not discovered in time, there is a risk of the wire rope breaking and the spool falling when the spreader is started to load or unload the spool, causing injuries to employees. Utility Model Content

[0004] The utility model aims to provide a rope protection device and a sling, which can prevent the rope from being worn hard by restricting the range of movement of the rope.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present utility model is as follows:

[0006] In a first aspect, the utility model provides a rope protection device comprising:

[0007] A limit seat and a rolling limit mechanism, wherein the limit seat is provided with a wire outlet hole for the rope to pass through, and the rolling limit mechanism includes a plurality of limit tubes, which are rotatably mounted on the limit seat, and the plurality of limit tubes form a limit structure, and the rope passes through the wire outlet hole and the limit structure in sequence to keep the rope in a non-contact state with the periphery of the wire outlet hole; during the movement of the rope, the rope contacts at least one limit tube, driving the limit tube to rotate, thereby forming rolling friction.

[0008] The rope coming out through the limiting structure is limited by the limiting structure, avoiding hard friction between the rope and the outlet hole. When the rope is dragged by the staff, it will drive the limiting tube in the rolling limiting mechanism to rotate, converting sliding friction into rolling friction, which significantly reduces friction.

[0009] In combination with the first aspect, optionally, the limiting structure is a well-shaped structure, and the multiple limiting tubes are staggered to form the well-shaped structure.

[0010] The limiting structure formed by the plurality of limiting tubes can have various shapes. When the limiting structure is in a crisscross pattern, the plurality of limiting tubes are staggered in various combinations to form a crisscross pattern, which can restrict the forward, backward, left, and right movement of a rope passing through the limiting structure, thereby maintaining a non-contact state between the rope and the periphery of the outlet hole.

[0011] In combination with the first aspect, optionally, the device further includes a limiting tube connector, the limiting tube connector including a limiting shaft and a bearing, the limiting shaft is mounted on the limiting seat, and the limiting tube is rotatably mounted on the limiting shaft through the bearing.

[0012] In order to make the rotation of the limiting tube smoother, a bearing may be used to support the limiting tube and guide the rotation of the limiting tube.

[0013] In combination with the first aspect, optionally, at least two bearings are provided, a spacer sleeve is provided between two adjacent bearings, and the spacer sleeve is sleeved on the limiting shaft.

[0014] In combination with the first aspect, optionally, two bearings are provided, the axial section of the tube hole of the limiting tube is I-shaped, the I-shaped corners at both ends of the tube hole are bearing supports, and the bearing supports are in contact with the end face of the bearing outer ring.

[0015] In addition to using a single bearing, two or more bearings can be used to improve the smoothness and stability of the limit tube rotation. In this case, a spacer is required to ensure that the relative distance between the bearings is kept stable.

[0016] The arrangement of the bearing support in the pipe hole can better maintain the relative distance between the two bearings and improve the stability of the rotation of the limit pipe.

[0017] In combination with the first aspect, optionally, a washer is provided between the bearing and the limiting seat, and the washer is sleeved on the limiting shaft to limit the axial displacement of the bearing in the limiting tube.

[0018] In combination with the first aspect, optionally, the washer is a cylindrical boss-shaped structure, and the boss end of the washer abuts against the inner ring end face of the bearing.

[0019] The protruding part of the washer rests against the end face of the inner ring of the bearing, and the base part can ensure a larger contact area with the cavity structure of the limit seat, better disperse the force, so that the washer can better fix the horizontal position of the bearing and improve the stability of the rotation of the limit tube.

[0020] In the second aspect, the utility model provides a sling, comprising a sling shell and a rope, and also comprising a rope protection device according to any one of the first aspects, wherein the limit seat is fixed on the sling shell, one end of the rope is wound around the sling, and the other end passes through the wire outlet hole and the limit structure in sequence and then is connected to the workpiece to be suspended.

[0021] In combination with the second aspect, optionally, a buckle and / or a first mounting hole is provided on the limit seat, which is used to connect the limit seat and the sling housing through the buckle and / or the first mounting hole.

[0022] In combination with the second aspect, optionally, the limiting seat includes an arc-shaped plate adapted to the outer shape of the sling housing, and the buckle and / or the first mounting hole are provided on the arc-shaped plate.

[0023] Beneficial effects:

[0024] Compared with the prior art, the present invention has the following advantages and improvements:

[0025] The utility model adopts a design of a limiting structure formed by a plurality of limiting tubes to restrict the range of movement of the rope and achieve a protective effect of avoiding hard wear of the rope.

[0026] The rope coming out through the limiting structure is limited by the limiting structure, avoiding hard friction between the rope and the outlet hole. When the rope is dragged by the staff, it will drive the limiting tube in the rolling limiting mechanism to rotate, converting sliding friction into rolling friction, which significantly reduces friction.

[0027] By setting bearings and a series of supporting structures, the rotation of the limit tube is made more stable;

[0028] In actual application, different numbers of bearings and different supporting structure combinations can be flexibly selected to improve the smoothness and stability of the limit tube rotation;

[0029] The design of the limit seat enables the rope protection device to better cooperate with the installation of the sling;

[0030] The utility model reduces the wear of the sling rope, prolongs the service life of the sling rope, and improves the safety of the sling.

[0031] The limiting structure, formed by multiple limiting tubes, can take on a variety of shapes. Flexible combinations of the number of limiting tubes, installation orientation, and installation height allow for a more diverse range of limiting structure designs. Coupled with differentiated limiting seat structures, this new rope protection device is adaptable to a wider range of applications. In addition to being applicable to rope protection for slings, the size and shape of the protection device can be adjusted to accommodate rope limiting and protection in various rope pulling scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a structural diagram of an embodiment of the rope protection device of the utility model;

[0033] Figure 2 yes Figure 1 Side cross-sectional diagram;

[0034] Figure 3 This is a side sectional schematic diagram of a limit seat and a mounting plate in accordance with an embodiment of the rope protection device of the present invention;

[0035] Figure 4 This is a front view of a limit seat and a mounting plate in accordance with an embodiment of the rope protection device of the present invention;

[0036] Figure 5 This is a cross-sectional diagram of the installation of a limit tube in one embodiment of the rope protection device of the utility model;

[0037] Figure 6 This is a schematic axial cross-sectional view of a limiting tube in one embodiment of the rope protection device of the present invention;

[0038] Figure 7 This is a schematic axial cross-sectional view of a washer in one embodiment of the rope protection device of the present utility model;

[0039] Description of reference numerals:

[0040] 1-limit seat; 2-limit tube; 3-spacer; 4-bearing; 5-washer; 6-screw; 7-nut; 8-rope; 9-clip; 10-wire outlet hole; 11-first mounting hole; 12-mounting plate; 13-second mounting hole; 101-upper plate; 102-back plate; 103-left plate; 104-right plate; 201-tube hole; 202-bearing support; 501-washer inner hole. DETAILED DESCRIPTION

[0041] The following will be combined with the accompanying drawings of the present invention to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only used to explain the relative positional relationships, movement conditions, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0043] Furthermore, in the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0044] Example 1

[0045] This embodiment introduces a rope protection device, referring to Figure 1 、 Figure 2 The rope protection device includes a limit seat 1 and a rolling limit mechanism. The limit seat 1 is provided with an outlet hole 10 for the rope 8 to pass through. The rolling limit mechanism includes a plurality of limit tubes 2. The limit tubes 2 are rotatably mounted on the limit seat 1, and the plurality of limit tubes 2 form a limit structure. The rope 8 passes through the outlet hole 10 and the limit structure in sequence, so that the rope 8 maintains a non-contact state with the periphery of the outlet hole 10; during the movement of the rope 8, the rope 8 contacts at least one limit tube 2, driving the limit tube 2 to rotate, thereby forming rolling friction.

[0046] The limiting structure can be in various shapes, such as triangle, square, rectangle, polygon, etc. Multiple limiting tubes 2 are not limited to being arranged in a single layer to form a limiting structure for the rope 8 to pass through. Multiple limiting tubes can be staggered in multiple layers to form a limiting structure for the rope 8 to pass through. The position and size of the limiting structure can be selected based on the actual needs of the engineering application, in order to ensure that the rope 8 does not suffer from hard wear during use.

[0047] The rope protection device of this utility model can limit and guide objects passing through the limiting structure, and convert the sliding friction of the object into rolling friction with less friction, reducing the wear and tear caused by the pulling process. The rope protection device of this utility model should not be limited to the implementation scenarios described in the background art. In addition to being used in conjunction with slings to protect the outlet of sling wire ropes, it can also be used to protect ropes in other pulley applications and other situations where limiting or preventing wear is required.

[0048] When the rope protection device of the present invention is used to protect the hard wear of the black limiting nylon block at the outlet of the sling wire rope, the rope protection device of the present invention should be used to replace the original black limiting nylon block, and the installation position of the limiting seat 1 should be reasonably selected, and the setting of the outlet hole 10 of the rope protection device, the size of the limiting structure, and the distance between the limiting structure and the outlet of the original sling wire rope should be comprehensively considered to ensure that when the sling is in use, when the wire rope is dragged in all directions below the sling, the multiple limiting tubes of the rope protection device can roll smoothly and stably without affecting the smoothness of the wire rope being dragged, and the dragged wire rope can avoid contact with the outlet of the original sling wire rope and avoid hard wear with other adjacent structural parts, thereby achieving a rope protection effect.

[0049] Example 2

[0050] Based on the first embodiment, this embodiment introduces a rope protection device that can more specifically implement rope protection, such as Figures 1 to 7 As shown, specifically including the following:

[0051] 1. Specific installation of the limit tube:

[0052] The rope protection device also includes a limit tube connector, which includes a limit shaft and a bearing 4. The limit shaft is installed on the limit seat 1, and the limit tube 2 is rotatably installed on the limit shaft through the bearing 4. Figures 1 to 4 In some embodiments, the limiting tube connector further includes a mounting plate 12, and the mounting plate 12 is connected to the limiting seat 1. Both ends of the limiting shaft are connected to the limiting seat 1, or one end of the limiting shaft is connected to the limiting seat 1 and the other end is connected to the mounting plate 12.

[0053] refer to Figure 1 and Figure 2 In some embodiments, the limiting structure is a tic-tac-toe structure, and the plurality of limiting tubes 2 are staggered to form the tic-tac-toe structure. Two pairs of limiting tubes 2 are provided, and the two pairs of limiting tubes 2 are staggered to form the tic-tac-toe structure.

[0054] refer to Figure 3 and Figure 4 The limit seat 1 can select a cavity structure with openings in the front and bottom. Two groups of second mounting holes 13 are respectively provided on the back and left and right sides of the limit seat 1. The mounting plate 12 is installed in front of the limit seat 1. The mounting plate 12 is provided with second mounting holes 13 corresponding to the back of the limit seat 1. The second mounting holes 13 on the left and right sides are correspondingly arranged and staggered in height with the second mounting holes 13 on the back. Each group of second mounting holes 13 contains several.

[0055] refer to Figures 1 to 4Specifically, the limiting shaft cooperates with the second mounting holes 13 on the left and right sides of the limiting seat 1 to fix the installation height of the limiting tube 2 located between the left and right sides of the limiting seat 1; the limiting shaft cooperates with the second mounting holes 13 on the back side of the limiting seat 1 and the mounting plate 12 to fix the installation height of the limiting tube 2 located between the back side of the limiting seat 1 and the mounting plate 12.

[0056] Combine Figures 1 to 4 The rope protection device has two groups of second mounting holes 13 on the left and right sides, each group has one second mounting hole 13; the two groups of second mounting holes 13 on the back and the mounting plate 12, each group also has one second mounting hole 13; the upper and lower layers of limiting tubes 2 of the rope protection device are staggered to form a well-shaped structure. When in use, the rope 8 first passes between the two limiting tubes 2 installed between the back and the mounting plate 12, and then passes between the two limiting tubes 2 installed between the left and right sides. These four limiting tubes are staggered to form a well-shaped structure when viewed from above. When the rope 8 passing through the rope protection device is subjected to the dragging force from the front and left of the staff below, the rope 8 will be constrained from the front, back, left and right by the four limiting tubes 2. During the process of the rope 8 being dragged, each limiting tube 2 will be forced to rotate, thereby reducing the hard wear on the rope 8.

[0057] During specific use, the rope 8 can also first pass between the two limiting tubes 2 installed on the left and right sides, and then pass between the two limiting tubes 2 installed between the back and the mounting plate 12. These four limiting tubes are still staggered to form a well-shaped structure when viewed from above, so that the forward, backward, left and right movements of the rope 8 will be constrained by the limiting tubes 2.

[0058] Figures 1 to 4 The rope protection device has four limiting tubes 2 that are layered and staggered to form a tic-tac-toe structure. The four limiting tubes 2 constrain the rope 8. In specific applications, the number of second mounting holes 13 in each group can be increased according to actual needs, and the installation direction of each layer of limiting tubes 2 can be flexibly designed to form a tic-tac-toe structure.

[0059] Combine Figure 1 、 Figure 2 、 Figure 3 and Figure 5 As shown, the limiting shaft includes a limiting shaft connecting member, which can be a screw 6. The limiting shaft connecting member is a nut 7 that matches the screw. The threaded end of the screw 6 sequentially passes through the second mounting hole 13 on one side of the limiting seat 1, the tube hole 201, and the second mounting hole 13 on the other side, and is threadedly connected with the nut 7 to fix the installation height of the limiting tube 2. The nut 7 can be a self-locking nut.

[0060] In a specific embodiment, referring to Figure 3 and Figure 4The limit seat 1 includes an upper plate 101, a back plate 102, a left side plate 103 and a right side plate 104. The edges of the upper plate 101, the back plate 102, the left side plate 103 and the right side plate 104 are connected and fixed to form a cavity structure with openings on the front and bottom. Figure 1 and Figure 2 The upper plate 101 is provided with an outlet hole 10 for the rope 8. After the rope 8 passes through the well-shaped structure formed by the limiting tube 2, the rope 8 can avoid hard wear during the process of being dragged by the tension in the front, back, left and right directions.

[0061] The shape of the limit seat 1 is not unique, except Figure 3 and Figure 4 The limiting seat 1 structure can also be a hollow cylindrical structure with openings on the front and bottom.

[0062] 2. Specific limit tube rotation supporting components

[0063] refer to Figure 5 In order to make the limiting tube 2 rotate more smoothly, the limiting tube 2 is rotatably connected to the limiting shaft through a bearing 4. Specifically, the bearing 4 can be equipped with a washer 5 to achieve smooth rotation of the limiting tube 2.

[0064] The rope protection device can be equipped with a bearing 4 and two washers 5. The bearing 4 and the washer 5 are sleeved on the outer periphery of the limiting shaft. The bearing 4 supports the limiting tube 2 and guides the limiting tube 2 to rotate. A washer 5 is arranged between the bearing 4 and the limiting seat 1 and between the bearing 4 and the mounting plate 12. The washer 5 is used to limit the axial displacement of the bearing 4 in the limiting tube 2.

[0065] The rope protection device can also be in the form of multiple bearings 4. In this case, spacers 3 need to be installed between the bearings 4 to ensure a stable relative distance between the bearings 4.

[0066] Figure 5 As shown, it is in the form of two bearings 4, two washers 5 and a spacer sleeve 3. The bearings 4, washers 5 and spacer sleeve 3 are arranged on the outer periphery of the limiting shaft. A spacer sleeve 3 is provided between the two bearings 4. Washers 5 are provided between the bearings 4 and the limiting seat 1 and between the bearings 4 and the mounting plate 12. The spacer sleeve 3 cooperates with the washer 5 to limit the axial displacement of the bearing 4 in the limiting tube 2, thereby improving the rotation stability of the limiting tube 2.

[0067] In order to better fix the relative positions of the bearings 4 and limit the axial displacement of the bearings 4 , the positioning of the bearings 4 can also be achieved by designing the shape of the tube hole 201 .

[0068] refer to Figure 6 As shown, the axial section of the tube hole 201 is I-shaped, and the I-shaped corners at both ends of the tube hole 201 are bearing supports 202, and the bearing supports 202 are in contact with the end face of the outer ring of the bearing 4.

[0069] In order to better fix the position of the bearing 4 , it can also be achieved by designing the shape of the washer 5 .

[0070] refer to Figure 7 As shown, the washer 5 is a cylindrical boss-shaped structure including a washer inner hole 501 , and the boss end of the washer 5 abuts against the end face of the inner ring of the bearing 4 .

[0071] The boss end of the washer 5 rests against the inner ring end face of the bearing 4 , and the base portion can ensure a larger contact area with the cavity structure of the limit seat 1 , better disperse the force, and enable the washer 5 to better limit the axial displacement of the bearing 4 .

[0072] The cooperation between the washer 5, the spacer sleeve 3 and the bearing support 202 firmly controls the axial displacement of the bearing 4, thereby making the rotation of the limiting tube 2 more stable.

[0073] In one embodiment, the limiting tube 2 is made of Cr12 material, the spacer 3 and the washer 5 are made of Q235 material, the bearing 4 is a 626 bearing, the screw 6 is an M6*80 screw, and the nut 7 is an M6 self-locking nut.

[0074] Example 3

[0075] This embodiment introduces a sling, including a sling shell and a rope 8, and also includes any one of the rope protection devices introduced in implementation one or two. The limit seat 1 is fixed on the sling shell, one end of the rope 8 is wound around the sling, and the other end passes through the wire outlet hole 10 and the limiting structure in sequence and is connected to the suspended workpiece.

[0076] The limit seat is provided with a buckle 9 and / or a first mounting hole 11, which is used to fix the limit seat 1 to the sling housing through the buckle 9 and / or the first mounting hole 11. Figures 1 to 4 As shown, in a specific embodiment, a buckle 9 and a first mounting hole 11 are provided on the upper end surface of the upper plate 101 .

[0077] The limiting seat 1 comprises an arc-shaped plate adapted to the outer shape of the sling housing, and the buckle 9 and / or the first mounting hole 11 are arranged on the arc-shaped plate. Figures 1 to 4 As shown, in a specific embodiment, the upper plate 101 is a curved plate with one end fixedly connected to the back plate 102 and the other end extending to fit the sling shell. In a specific embodiment, when the limit seat 1 is a hollow cylindrical structure, the upper surface of the cylindrical structure is a curved plate that fits the curvature of the sling.

[0078] Any one of the rope protection devices described in Implementation 1 or 2 is installed at the line outlet of the sling of this embodiment, serving as the line outlet limiter and protection device of the sling of this embodiment, thereby reducing the wear of the sling rope (usually a steel wire rope), improving the safety of the sling, and extending the service life of the sling rope.

[0079] The utility model can also design the upper plate 101 into other shapes that fit the outer shell of the sling or fit the shape of the outer shell of a sling of other shapes according to the needs of actual applications, and can be used in other occasions where rope protection is required.

[0080] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the invention and the claims, which are all within the protection of the present invention.

Claims

1. A rope protection device, characterized in that: The invention comprises a limiting seat (1) and a rolling limiting mechanism, wherein the limiting seat (1) is provided with an outlet hole (10) for the rope (8) to pass through, and the rolling limiting mechanism comprises a plurality of limiting tubes (2), the limiting tubes (2) are rotatably mounted on the limiting seat (1), and the plurality of limiting tubes (2) form a limiting structure, and the rope passes through the outlet hole (10) and the limiting structure in sequence, so that the rope (8) maintains a non-contact state with the periphery of the outlet hole (10); during the movement of the rope (8), the rope (8) contacts at least one limiting tube (2), driving the limiting tube (2) to rotate, thereby forming rolling friction.

2. The rope protection device according to claim 1, characterized in that The limiting structure is a well-shaped structure, and the plurality of limiting tubes (2) are staggered to form the well-shaped structure.

3. The rope protection device according to claim 1, characterized in that It also includes a limiting tube connector, which includes a limiting shaft and a bearing (4). The limiting shaft is installed on the limiting seat (1), and the limiting tube (2) is rotatably installed on the limiting shaft through the bearing (4).

4. The rope protection device according to claim 3, characterized in that At least two bearings (4) are provided, and a spacer sleeve (3) is provided between two adjacent bearings (4), and the spacer sleeve (3) is sleeved on the limiting shaft.

5. The rope protection device according to claim 3, characterized in that Two bearings (4) are provided, the tube hole (201) of the limiting tube has an I-shaped axial section, the I-shaped corners at both ends of the tube hole (201) are bearing supports (202), and the bearing supports (202) are in contact with the end face of the outer ring of the bearing (4).

6. The rope protection device according to claim 4 or 5, characterized in that: A washer (5) is provided between the bearing (4) and the limiting seat (1), and the washer (5) is sleeved on the limiting shaft and is used to limit the axial displacement of the bearing (4) on the limiting shaft.

7. The rope protection device according to claim 6, characterized in that The washer (5) is a cylindrical boss-shaped structure, and the boss end of the washer (5) abuts against the inner ring end face of the bearing (4).

8. A sling comprising a sling housing and a rope (8), characterized in that: It also includes the rope protection device according to any one of claims 1 to 7, wherein the limit seat (1) is connected to the sling housing, one end of the rope (8) is wound inside the sling, and the other end passes through the wire outlet hole (10) and the limit structure in sequence and is connected to the suspended workpiece.

9. The spreader according to claim 8, characterized in that: The limit seat (1) is provided with a buckle (9) and / or a first mounting hole (11), which is used to connect the limit seat (1) to the sling housing through the buckle (9) and / or the first mounting hole (11).

10. The spreader according to claim 9, characterized in that: The limiting seat (1) comprises an arc-shaped plate adapted to the outer shape of the sling housing, and the buckle (9) and / or the first mounting hole (11) are arranged on the arc-shaped plate.

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