A guide and traction mechanism for rope-rail type lifting equipment

Abstract

A guide and traction mechanism for a rope-rail type lifting device comprises a base plate, a hook-shaped guide block, a clamping mechanism and an active traction wheel. A through hole is provided in the center of the base plate, and the active traction wheel is provided at the through hole. Clamping mechanisms are provided on both sides of the active traction wheel, and the clamping mechanisms on both sides are mirror-symmetrical about the center of the active traction wheel. Hook-shaped guide blocks are provided on the outsides of the two clamping mechanisms. The two hook-shaped guide blocks are mirror-symmetrical about the center of the active traction wheel. The active traction wheel is composed of two wheels with mirror-symmetrical inner surfaces, and a rope groove is formed between the two wheels. The active traction wheel of the present invention has higher load capacity and efficiency; it can ensure that the posture of the equipment does not deflect when it runs along the rope, thereby meeting the requirements of multiple devices working in series along the same rope; the clamping mechanism of the present invention can limit the connecting rod to a dead point position; ensure that the contact and separation process of the mechanism with the rope is consistent when it runs along the rope; the rope is easy and fast to install.

Description

Technical Field

[0001] The invention belongs to the technical field of special lifting equipment, and in particular relates to a guide and traction mechanism for rope-rail type lifting equipment. Background Art

[0002] Rope-track lifting equipment (also known as rope climbing / line robot, climbing robot, rope climbing hoist, etc. in other patents) is a special lifting equipment, mainly used for the transportation of personnel and materials in narrow, deep, and outdoor environments, such as rescue climbing and escape from urban high-rise fires, mine rescue, field exploration and rescue, etc., which can reduce the corresponding manpower and time consumption.

[0003] Existing related technologies can be basically divided into four categories according to their working principles: rope lifting similar to a winch (CN102530760A); lifting relying on the friction between a wheeled mechanism and a rope (CN101049898, CN102913579A, CN102188796A, US7513334, US7261278); bionic mechanisms, such as gripper mechanisms (CN106564068A); and relying on meshing force (US6412602).

[0004] Most existing rope-track hoists use various forms of friction wheels as their actuators, relying on the friction between the wheel and the rope for lifting. However, existing friction wheel mechanisms generally suffer from low load capacity, low lifting efficiency, complex structures, large size and weight, and low reliability of the rope detachment link, which affects the overall performance of rope-track hoists.

[0005] Furthermore, existing technologies are primarily designed for use with a single rope-track hoist on a vertically suspended rope. They fail to adequately consider scenarios where multiple rope-track hoists operate in tandem on the same rope, or on horizontally or tilted ropes. Operating in such situations can result in mid-air posture changes, reduced efficiency, and even dangerous situations.

[0006] The existing friction wheel mechanism, taking an invention patent from 2012 (patent name: Friction device for rope transmission, patent number: CN102913579A, inventors: Li Jing; Yuan Boyin; Xu Bin) as an example, has the following main shortcomings: the unit arc load capacity of the active friction wheel is limited, and the rope needs to be wound multiple times to provide a certain load capacity, which leads to an increase in the volume of the mechanism; the friction transmission lifting mechanism inevitably causes the rope to elastically slide relative to the friction wheel, resulting in low efficiency; the overall design of the friction mechanism mainly considers the situation where a single rope-rail lifting equipment runs along a vertical rope, and the near-ground end is limited only by a clamping wheel relying on spring force. When multiple machines work in series or the rope runs along an inclined or horizontal direction, the tension of the end rope increases significantly, which may cause the rope to detach from the friction mechanism and cause danger; the rope has poor reciprocity of movement in the contact part with the mechanism, and the reliability is low when running in the reverse direction. Summary of the Invention

[0007] In response to the problems existing in the above-mentioned prior art, the present invention aims to provide a guiding and traction mechanism for rope-rail type lifting equipment, and provide a guiding and traction device with high load capacity, high efficiency and small size, which can be used for rope-rail type lifting equipment and can meet the posture maintenance and reliability requirements when multiple rope-rail type lifting equipment work in series on the same rope and the equipment runs along horizontal and inclined ropes.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A guide and traction mechanism for a rope-rail type lifting device comprises a base plate, a hook-shaped guide block, a clamping mechanism and an active traction wheel. The base plate is a foundation for the active traction wheel, the hook-shaped guide block and the clamping mechanism to be installed.

[0010] A through hole is provided at the center of the base plate, and the active traction wheel is arranged at the through hole position.

[0011] The clamping mechanism includes a first clamping mechanism and a second clamping mechanism, which are respectively arranged on both sides of the active traction wheel. The structures of the first clamping mechanism and the second clamping mechanism are mirror-symmetrical about the center of the active traction wheel.

[0012] The hook-shaped guide block includes a hook-shaped guide block 1 and a hook-shaped guide block 2, which are respectively arranged on the outside of the clamping mechanism 1 and the clamping mechanism 2. The structures of the hook-shaped guide block 1 and the hook-shaped guide block 2 are mirror-symmetrical about the center of the active traction wheel.

[0013] The substrate is provided with two groups of groove structures, and the shapes of the two groups of grooves are mirror-symmetrical about the central plane.

[0014] The active traction wheel is composed of two wheel discs whose inner surfaces are mirror-symmetrical, and a rope groove is formed between the two wheel discs.

[0015] An inner hole is provided at the center of the wheel disc, and the inner hole of the wheel disc of the active traction wheel has a keyway structure.

[0016] The clamping mechanism consists of a first hinge shaft, a first connecting rod, a second hinge shaft, a third hinge shaft, a clamping wheel, a second connecting rod, a limiting slider and a spring.

[0017] One end of the connecting rod 1 is hinged to the base plate through the hinge shaft 1, the other end of the connecting rod 1 is connected to the connecting rod 2 through the hinge shaft 2, and the other end of the connecting rod 2 is connected to the pressure wheel through the hinge shaft 3.

[0018] Furthermore, the connecting rod 1 and the connecting rod 2 enter the dead point position when the angle between the two connecting rods is 180 degrees, and the maintenance of the connecting rod 1 and the connecting rod 2 at the dead point position depends on the blocking of the limit slider.

[0019] Furthermore, one end of the hook-shaped guide block 1 and the hook-shaped guide block 2 has a hook-shaped feature, and this part has an inclination, which corresponds to the angle of the rope groove of the active traction wheel and is generally 1° to 2° smaller than the latter.

[0020] Furthermore, the side of the hook-shaped guide block 1 and the hook-shaped guide block 2 that contacts the rope is the inner side, and the inner contour line is an arc at one end of the hook portion. The arc radius is generally 1 / 4 to 1 / 2 of the radius of the active traction wheel. After installation, the arc is tangent to the rope groove of the active traction wheel.

[0021] Furthermore, the outer diameter of the pressure wheel is generally 4 to 8 mm smaller than the arc radius of the hook top end of the inner contour line of the hook-shaped guide block, and the outer surface of the pressure wheel has fine lines to increase the surface contact force between it and the rope.

[0022] Furthermore, the inner contour of the hook-shaped guide block has a groove structure, and the inner groove of the hook-shaped guide block is in the shape of a semicircle with a diameter of 10±2 mm.

[0023] Furthermore, the other end of the inner contour line of the hook-shaped guide block one and the hook-shaped guide block two is a straight line segment or a curve, the extension line of the tangent of the straight line or curve at this end passes through the center of the traction wheel, and the extension lines of the end of the hook-shaped guide block one and the hook-shaped guide block two are on the same straight line.

[0024] Furthermore, the surfaces of the two wheels of the active traction wheel are evenly arranged with a number of regular ridge structures, the ridge height is 2mm to 5mm, the ridge height can be constant or variable along the radial direction, the number of ridges is 12 to 20, and the ridge center lines are radially distributed.

[0025] Furthermore, the two wheel discs of the active traction wheel are connected by a plurality of bolts.

[0026] Furthermore, the contour lines on both sides of the cross-sectional shape of the wheel disc ridge of the active traction wheel are involutes, and the top end of the cross-sectional shape of the ridge is chamfered.

[0027] Furthermore, the diameter of the rope groove of the active traction wheel is generally 30 mm to 90 mm.

[0028] Furthermore, the outer diameter of the traction wheel is generally 50 mm to 120 mm.

[0029] Furthermore, the groove on the substrate consists of two straight grooves and one arc groove, and the arc of the arc groove of the groove on the substrate is π / 3.

[0030] Furthermore, the ends of the hinge axis 2 and the hinge axis 3 can slide along the grooves on the substrate, and the limit slider can slide in the straight line section of the groove of the substrate. Under the elastic force of the spring, the limit slider will be embedded in the arc section of the substrate groove, and the upper surface of the limit slider has a structure that is convenient for people to apply force and press.

[0031] Furthermore, threaded holes for installing hooks are left at the bottom and one side of the base plate, and the centers of the two threaded holes pass through the center of gravity of the entire rope-rail lifting device.

[0032] Furthermore, the inner surface of a single wheel is a conical surface with a cone angle of 15±5°, and the rope groove opening angle of the active traction wheel formed by the single wheel is 30±10°.

[0033] Furthermore, the number of the bolts is 3 to 6.

[0034] Furthermore, after overall assembly, the inner contour lines of the hook-shaped guide block 1 and the hook-shaped guide block 2 are straight line segments or curves at the ends away from the hook tops, and the extension lines of the tangents of the end straight lines or curves are collinear and pass through the center of the active traction wheel.

[0035] The beneficial effects of the present invention are:

[0036] (1) The active traction wheel provided by the present invention has higher load capacity and efficiency;

[0037] (2) The guide mechanism provided by the present invention can guide the two ends of the rope to a straight line passing through the symmetric center of the active traction wheel, ensuring that the device can maintain its posture without deflection when running along the rope, thereby meeting the requirements of multiple devices working serially along the same rope;

[0038] (3) The clamping mechanism of the present invention is composed of a clamping wheel and a connecting rod mechanism with a dead point position. When the connecting rod is at the dead point position, the clamping wheel will clamp the rope, and the limit slider is pushed into the arc slide groove under the action of the spring, limiting the connecting rod to remain at the dead point position;

[0039] (4) The rope groove patterns of the active traction wheel of the present invention are mirror-symmetrical, and the guide mechanism is composed of two sets of hook-shaped guide blocks that are identical or have identical working surfaces. After assembly, the two hook-shaped guide blocks are mirror-symmetrical relative to the active traction wheel. This distribution ensures that the contact and separation processes of the mechanism with the rope are completely consistent when running in the forward and reverse directions of the rope.

[0040] (5) The rope of the present invention is more convenient and quick to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the structure of the present invention;

[0042] Figure 2 This is the composition diagram of the pressing mechanism;

[0043] Figure 3 The position relationship of the guiding traction mechanism, i.e. the schematic diagram of the rope direction;

[0044] Figure 4 It is a structural diagram of the clamping mechanism in the released state.

[0045] Figure markings: 1-base plate, 2-hook-shaped guide block one, 3-clamping mechanism one, 3-1-articulated shaft one, 3-2-connecting rod one, 3-3-articulated shaft two, 3-4-articulated shaft three, 3-5-pressing wheel, 3-6-connecting rod two, 3-7-limiting slider, 3-8-spring, 4-active traction wheel, 5-clamping mechanism two, 6-hook-shaped guide block two. DETAILED DESCRIPTION

[0046] For ease of understanding, the technical solution of the present invention is further described in detail below with reference to the accompanying drawings and through embodiments:

[0047] like Figure 1-Figure 4 As shown, a guide and traction mechanism for a rope-rail type lifting device includes a base plate 1, a hook-shaped guide block 2, a clamping mechanism 3, an active traction wheel 4, a clamping mechanism 5 and a hook-shaped guide block 6.

[0048] The base plate 1 is the base on which the active traction wheel 4, the hook-shaped guide block 1 2, the hook-shaped guide block 2 6, the clamping mechanism 1 3 and the clamping mechanism 2 5 are installed.

[0049] A through hole is provided at the center of the base plate 1 to facilitate the assembly and connection between the power or transmission device and the active traction wheel 4.

[0050] The active traction wheel 4 is arranged at the through hole position. The pressing mechanism 1 3 and the pressing mechanism 2 5 are respectively arranged on both sides of the active traction wheel 4.

[0051] The hook-shaped guide block 1 2 and the hook-shaped guide block 2 6 are located on the outside of the pressing mechanism 1 3 and the pressing mechanism 2 5 respectively.

[0052] The substrate 1 has two groups of groove structures, and the shapes of the two groups of grooves are mirror-symmetrical about the central plane.

[0053] Each group of grooves consists of two straight grooves and one arc groove, and the arc of the arc groove is π / 3.

[0054] Threaded holes for mounting hooks are provided at the bottom and left side of the base plate 1 , and the centers of the two threaded holes pass through the center of gravity of the entire rope-rail lifting device.

[0055] The active traction sheave 4 is composed of two discs with mirror-symmetrical inner surfaces. The inner surface of a single disc is a conical surface with a cone angle of 15±5°, 15° in this example. The rope groove opening angle of the active traction sheave composed of the two discs is 30±10°, 30° in this example.

[0056] The rope groove diameter of the active traction wheel 4 is generally 30 mm to 90 mm, and is 35 mm in this example. The outer diameter of the traction wheel is generally 50 mm to 120 mm, and is 72 mm in this example.

[0057] The surfaces of the two wheels of the active traction wheel 4 are evenly arranged with a number of regular ridge structures. The ridge height is 2mm to 5mm, and the ridge height can be constant or variable along the radial direction. In this example, the ridge height is 2.5 to 3.5mm. The number of ridges is 12 to 20, and is 12 in this example. The center lines of the ridges are distributed radially.

[0058] The contour lines on both sides of the cross-sectional shape of the wheel disc ridge of the active traction wheel 4 are involutes (a simplified version can be an isosceles acute triangle or an isosceles trapezoid), and the top of the cross-sectional shape of the ridge is chamfered.

[0059] The two wheel discs of the active traction wheel 4 are connected by a plurality of bolts. The number of the bolts is 3 to 6, and 4 in this example.

[0060] The inner hole of the wheel disc of the active traction wheel 4 has a keyway structure for connecting with the power transmission device and is installed at the center hole position of the base plate 1.

[0061] The structures of the hook-shaped guide block 1 2 and the hook-shaped guide block 2 6 are mirror-symmetrical about the center of the active traction wheel.

[0062] One end of the hook-shaped guide block 1 2 and the hook-shaped guide block 2 6 has a hook-shaped feature, and after assembly, one end of the hook portion will extend into the groove of the active traction wheel 4. This portion has an inclination, which corresponds to the angle of the rope groove of the active traction wheel 4 and is generally 1° to 2° smaller than the latter.

[0063] The side of the hook-shaped guide block 1 2 and the hook-shaped guide block 2 6 that contacts the rope is the inner side, and the inner contour line is an arc at one end of the hook. The arc radius is generally 1 / 4 to 1 / 2 of the radius of the active traction wheel 4. After installation, the arc is tangent to the rope groove of the active traction wheel 4.

[0064] The inner contours of the hook-shaped guide block 1 2 and the hook-shaped guide block 2 6 have a groove structure, and the groove shape is a semicircle with a diameter of 10±2 mm.

[0065] The other end of the inner contour line of the hook-shaped guide block 1 2 and the hook-shaped guide block 2 6 is a straight line segment or a curve, the extension line of the tangent of the straight line or curve at this end passes through the center of the traction wheel, and the extension lines of the end of the hook-shaped guide block 1 2 and the hook-shaped guide block 2 6 are on the same straight line.

[0066] The clamping mechanism 1 3 and the clamping mechanism 2 5 are both composed of an articulated shaft 1 3-1, a connecting rod 1 3-2, an articulated shaft 2 3-3, an articulated shaft 3 3-4, a clamping wheel 3-5, a connecting rod 2 3-6, a limiting slider 3-7 and a spring 3-8.

[0067] The structures of the clamping mechanism 1 3 and the clamping mechanism 2 5 are mirror-symmetrical.

[0068] One end of the connecting rod 1 3-2 is hinged to the base plate 1 through the hinge shaft 1 3-1, the other end of the connecting rod 1 3-2 is connected to the connecting rod 2 3-6 through the hinge shaft 2 3-3, and the other end of the connecting rod 2 3-6 is connected to the pressure wheel 3-5 through the hinge shaft 3 3-4.

[0069] The outer diameter of the pressure wheel 3-5 is generally 4 to 8 mm smaller than the arc radius of the inner contour line of the hook top end of the hook-shaped guide block 1 2 or the hook-shaped guide block 2 6. The outer surface of the pressure wheel 3-5 has fine lines to increase the surface contact force between it and the rope.

[0070] The ends of the second hinge shaft 3 - 3 and the third hinge shaft 3 - 4 can slide along the sliding groove on the base plate 1 .

[0071] The limit slider 3-7 can slide in the straight section of the slide groove of the substrate 1. Under the elastic force of the spring 3-8, the limit slider 3-7 will be embedded in the arc section of the slide groove of the substrate 1. The upper surface of the limit slider 3-7 has a structure that is convenient for manual pressure.

[0072] The connecting rod 1 3-2 and the connecting rod 2 3-6 enter the dead point position when the angle between the two connecting rods is 180 degrees. The maintenance of the connecting rod 1 3-2 and the connecting rod 2 3-6 at the dead point position depends on the blocking of the limit slider 3-7. At the dead point position, the tension wheel presses the rope into the groove of the arc hook.

[0073] After overall assembly, the inner contour lines of the hook-shaped guide block 1 2 and the hook-shaped guide block 2 6 are straight line segments or curves at the end away from the hook top, and the extension lines of the tangents of the end straight line or curve are collinear and pass through the center of the active traction wheel 4.

[0074] The clamping mechanism 1 3 and the clamping mechanism 2 5 together with the hook-shaped guide block 1 2 and the hook-shaped guide block 2 6 ensure the contact angle between the rope and the active traction wheel 4 ( Figure 3The arc of θ) is not less than π, so as to ensure sufficient contact force to drive the load movement.

[0075] The operation process of rope installation: first release the clamping mechanism 1 3, overcome the elastic force of the spring 3-8 and press the limit slider 3-7 completely into the straight groove of the base plate 1; push the hinge shaft 2 3-3 to make the connecting rod 1 3-2 and the connecting rod 2 3-6 out of the dead point position; the connecting rod 2 3-6 drives the clamping wheel 3-5 to move along the slide groove of the base plate 1 away from the active traction wheel 4, thereby releasing the space required for rope installation.

[0076] Similar operations can release the clamping mechanism 2 5;

[0077] The rope 7 is installed in the track formed by the inner grooves of the hook-shaped guide block 1 2 and the hook-shaped guide block 2 6 and the rope groove of the active traction wheel 4, and the rope 7 is combed to make it fit the track; the hinge shaft 2 3-3 is pushed so that the pressure wheel 3-5 presses the rope 7, and the connecting rod 1 3-2 and the connecting rod 2 3-6 return to the dead point position. The limit slider 3-7 is embedded in the arc groove of the base plate 1 under the action of the spring 3-8, thereby limiting the connecting rod 1 3-2 and the connecting rod 2 3-6 at the dead point position;

[0078] Similar operations can restore the clamping mechanism 2 5.

[0079] Mechanism operation process: The active traction sheave 4 rotates under the drive of the power device or transmission mechanism, relying on the special ridge structure of its own rope groove to bite the rope 7 and make it rotate accordingly, thereby causing the rope track type hoisting equipment using this device as an actuator to move along the rope 7. During operation, the hook-shaped guide block 12 at the rope inlet end guides the rope 7 smoothly into the groove of the active traction sheave 4, and the hook-shaped guide block 26 at the rope outlet end smoothly scrapes the rope 7 out of the groove of the active traction sheave 4 and guides it out of the rope track type hoisting equipment.

Claims

1. A guide and traction mechanism for a rope-rail type lifting device, comprising a base plate, a hook-shaped guide block, a clamping mechanism, and an active traction wheel, wherein a through hole is provided at the center of the base plate, and the active traction wheel is disposed at the position of the through hole; The clamping mechanism includes a first clamping mechanism and a second clamping mechanism, wherein the first clamping mechanism and the second clamping mechanism are respectively arranged on both sides of the active traction wheel, and the structures of the first clamping mechanism and the second clamping mechanism are mirror-symmetrical about the center of the active traction wheel; The hook-shaped guide block includes a hook-shaped guide block 1 and a hook-shaped guide block 2, wherein the hook-shaped guide block 1 and the hook-shaped guide block 2 are respectively arranged on the outside of the clamping mechanism 1 and the clamping mechanism 2, and the structures of the hook-shaped guide block 1 and the hook-shaped guide block 2 are mirror-symmetrical about the center of the active traction wheel; The substrate has two groups of groove structures, and the shapes of the two groups of grooves are mirror-symmetrical about the central plane; The active traction wheel is composed of two wheels with mirror-symmetrical inner surfaces, a rope groove is formed between the two wheels, an inner hole is provided at the center of the wheel, and the inner hole of the wheel of the active traction wheel has a keyway structure; The cam is connected to the base by a hinged joint, and the other end of the hinge is connected to the base by a hinged joint. The limit slider can slide in the straight section of the slide groove of the base plate. Under the elastic force of the spring, the limit slider will be embedded in the arc section of the slide groove of the base plate. The upper surface of the limit slider has a structure that is convenient for manual pressure application. When the angle between the two connecting rods is 180 degrees, the connecting rods 1 and 2 enter the dead point position. The maintenance of the dead point position of the connecting rods 1 and 2 depends on the blocking of the limit slider. At the dead point position, the pressure wheel presses the rope tightly into the groove of the arc hook. Each set of grooves consists of two straight grooves and one arc groove. The arc of the arc groove is π / 3. After the overall assembly, the inner contour lines of the hook-shaped guide block 1 and the hook-shaped guide block 2 are straight segments at the ends away from the hook top, and the extension lines of the straight segments are collinear and pass through the center of the active traction wheel; The first and second clamping mechanisms, together with the first and second hook-shaped guide blocks, ensure that the arc of the contact angle between the rope and the active traction wheel is not less than π, thereby ensuring sufficient contact force to drive the load movement; First, release the clamping mechanism 1 to overcome the elastic force of the spring and press the limit slider completely into the straight groove of the base plate; push the second part of the hinge shaft to make the connecting rod 1 and the connecting rod 2 move out of the dead point position; the connecting rod 2 drives the clamping wheel to move along the base plate slot away from the active traction wheel, thereby releasing the space required for rope installation.

2. The guide and traction mechanism for a rope-rail type lifting device according to claim 1, characterized in that: The outer diameter of the pressure wheel is 4 to 8 mm smaller than the arc radius of the hook top end of the inner contour line of the hook-shaped guide block, and the outer surface of the pressure wheel has fine lines.

3. The guide and traction mechanism for a rope-rail type lifting device according to claim 2, characterized in that: The two wheel discs of the active traction wheel are connected by a plurality of bolts.

4. The guide and traction mechanism for a rope-rail type lifting device according to claim 3, characterized in that: Threaded holes for installing hooks are left at the bottom and one side of the base plate, and the centers of the two threaded holes pass through the center of gravity of the entire rope-rail lifting device.

5. The guide and traction mechanism for a rope-rail type lifting device according to claim 4, characterized in that: The inner surface of a single wheel is a conical surface with a cone angle of 15±5°, and the rope groove opening angle of the active traction wheel composed of the single wheel is 30±10°.

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