CN111792536A - Stall-protection travelling crane - Google Patents

Abstract

The invention discloses a stall-protected travelling crane which comprises a travelling mechanism, a lifting mechanism, a sliding mechanism and a stall protection mechanism. The running mechanism is arranged on the track and can move along the track; the lifting mechanism is connected with the traveling mechanism and comprises a lifting frame body, a rotary driver and a roller, wherein the rotary driver and the roller are arranged on the lifting frame body; the sliding mechanism is connected with the lifting mechanism and moves along with the movement of the rope body; the stall protection mechanism is connected with the sliding mechanism and wound around the rope body to prevent the moving speed of the rope body from exceeding a preset value. The rope body is wound through the stall protection mechanism after coming out of the roller, then freely descends, and lifts the object. When the rope body ascends or descends in an overspeed manner in the running process, the speed of the rope body is limited, so that the rope body is limited to run within a preset value. Therefore, the device has good safety protection effect, can not be out of control due to motor faults and frequency converter faults, and protects equipment and personal safety.

Description

Stall-protection travelling crane

Technical Field

The invention relates to a hoisting device, in particular to a stall protection crane.

Background

The travelling crane is also called a crown block and is commonly known as a crane by people, is generally arranged at the top of a factory building or a workshop, is supported on a track of a wall, and is driven by a motor to walk and lift back and forth so as to realize the lifting and carrying of objects.

However, the existing travelling crane needs to be driven by a motor to operate. For safety, it is limited to operating within a certain speed, which if exceeded could cause accidental injury. Because the rotating speed of the motor can be changed by factors such as frequency, voltage and the like, when the frequency converter breaks down or is damaged, the rotating speed can be out of control, and a runaway accident can be caused. When the automobile rapidly falls down, transported objects can be damaged by collision, workers are hit by the arrangement, safety accidents are caused, and the automobile, transported objects, workshop equipment and personnel can be injured by rapid rising or falling.

In the prior art, a sensor is used for detecting the rotating speed in some cases, and when the rotating speed is too high, a controller controls the motor to run at a reduced speed, the stability of the technology is not high enough, elements such as the sensor, a circuit and the controller are easy to damage and break down in severe environments with high temperature and high pressure, and locking devices are used in some cases, but the devices can only play the effect when in a power-off state. Therefore, there is a need for a vehicle that effectively prevents speeding.

Disclosure of Invention

In order to solve the above technical problems, an object of the present invention is to provide a traveling crane capable of protecting against abnormal stall.

An embodiment of the present invention provides a stall-protected traveling crane, including:

the walking mechanism is arranged on the track and comprises a walking frame body and walking rollers, and the walking rollers can move along the track;

the lifting mechanism is connected with the walking mechanism and comprises a lifting frame body, a rotary driver and a roller, wherein the rotary driver and the roller are arranged on the lifting frame body;

the sliding mechanism is connected with the lifting mechanism and moves along with the movement of the rope body;

and the stall protection mechanism is connected with the sliding mechanism and wound around the rope body and is used for preventing the moving speed of the rope body from exceeding a preset value.

Optionally, the sliding mechanism includes:

the reciprocating screw rod is rotatably arranged on the lifting frame body, is connected with the roller through a transmission piece and rotates along with the rotation of the roller;

and the sliding piece is matched and connected with the reciprocating lead screw and moves in a reciprocating manner along with the rotation of the reciprocating lead screw, and the stall protection mechanism is connected with the sliding piece.

Optionally, the stall protection mechanism comprises:

the shell is connected with the sliding mechanism and is provided with an accommodating space, and the non-Newtonian fluid is hermetically arranged in the accommodating space;

the speed reducing mechanism comprises a rotating sleeve and a rotating blade arranged on the rotating sleeve;

the roller mechanism comprises a first roller, the first roller is connected with the rotating sleeve, and the rope body is wound around the first roller.

Optionally, the stall protection mechanism further comprises:

and the adjusting mechanism is connected with the speed reducing mechanism and is used for adjusting the fluid resistance received by the rotating blade during rotation.

Optionally, the roller mechanism further includes:

and the second roller is connected with the shell through a second pin shaft, and the rope body is wound around the second roller.

Optionally, the stall protection mechanism further comprises:

and the roller adjusting mechanism is used for adjusting the positions of the second roller and the first roller.

Optionally, the roller adjustment mechanism includes:

a bracket connected with the housing;

and the adjusting screw rod radially penetrates through the support and the second pin shaft, is in threaded connection with the second pin shaft, and moves the second roller when the adjusting screw rod is rotated.

Optionally, the roller adjustment mechanism further includes:

the rope body sliding sleeve is arranged on the support and provided with a rope body hole used for penetrating the rope body, and a round chamfer is arranged at one end, close to the first roller, of the rope body hole.

Optionally, the rotating sleeve has an axial through hole and a radial sliding groove, and the adjusting mechanism includes:

the sliding rod is arranged in the rotating sleeve and is used for axially moving relative to the rotating sleeve;

one end of the connecting rod is hinged with the rotating blade, the other end of the connecting rod is hinged with the sliding rod, and the connecting rod drives the rotating blade to move along the radial direction of the sliding groove when swinging;

one end of the first elastic piece is connected with the rotating sleeve, and the other end of the first elastic piece is connected with the sliding rod and used for providing axial pulling force between the rotating sleeve and the sliding rod;

and the operating piece is connected with the sliding rod and the shell and used for adjusting the axial position of the sliding rod.

Optionally, the operating member includes:

the third shell is provided with an accommodating space, and a first wire drawing hole is formed in the third shell;

the coarse adjustment mechanism comprises a coarse adjustment knob and a coarse adjustment roller connected with the coarse adjustment knob, the coarse adjustment roller is arranged in the third shell and is provided with an accommodating space and a second pull wire hole, the coarse adjustment knob is positioned outside the third shell, and when the coarse adjustment knob is rotated, the coarse adjustment roller is driven to rotate;

the fine adjustment mechanism comprises a fine adjustment knob and a fine adjustment roller connected with the fine adjustment knob, the fine adjustment roller is arranged in the coarse adjustment roller, and the fine adjustment knob is positioned outside the third shell;

and one end of the pull wire penetrates through the first pull wire hole and the second pull wire hole and is connected with the fine adjustment roller, and the other end of the pull wire is connected with the sliding rod.

Optionally, the operating member further includes:

and the clutch mechanism is connected with the coarse adjustment mechanism and the fine adjustment mechanism and is used for connecting or separating the coarse adjustment mechanism and the fine adjustment mechanism.

Optionally, the clutch mechanism includes:

one end of the pressing rod axially penetrates through the fine adjustment mechanism, and the other end of the pressing rod is arranged outside the third shell;

the reset spring is sleeved on the pressing rod and used for providing resilience force after the pressing rod is pressed;

and the second connecting rod is connected with the pressing rod and is used for clamping or separating the rough adjusting roller.

Optionally, the coarse adjustment mechanism further includes:

a first positioning mechanism for defining a rotational position of the coarse wheel.

Optionally, the fine adjustment mechanism further includes:

and the second positioning mechanism is used for limiting the rotating position of the fine adjustment roller.

Optionally, the first positioning mechanism includes:

a plurality of first positioning tooth grooves are arranged along the outer peripheral surface of the rough adjusting roller;

one end of the first clamp spring is clamped with the first positioning tooth groove, and the other end of the first clamp spring is connected with the inner wall of the third shell.

Optionally, the second positioning mechanism includes:

a plurality of second positioning tooth grooves are formed along the peripheral surface of the fine adjustment roller;

and one end of the second clamp spring is clamped with the second positioning tooth groove, and the other end of the second clamp spring is connected with the inner wall of the rough adjusting roller.

Optionally, the operating member further includes:

and the pull wire sleeve is sleeved on the pull wire, one end of the pull wire sleeve is connected with the shell, and the other end of the pull wire sleeve is connected with the third shell.

By using the invention, after the rope body comes out of the roller, the rope body winds through the stall protection mechanism and then freely descends to lift an object. When the rope body ascends or descends in an overspeed manner in the running process, the speed of the rope body is limited, so that the rope body is limited to run within a preset value. The preset value can be manually set, so that a good safety protection effect is achieved, the phenomenon of out of control caused by motor faults and frequency converter faults is avoided, and equipment and personal safety are protected.

When the speed is limited, the rope body is wound on the roller mechanism, and can move up and down when the rope body is lifted, so that the first roller is driven to rotate. The first roller is passively rotated, so that the rotating blade is also passively rotated, and the non-Newtonian fluid is stirred. And non-Newtonian fluid when stirring at low speed, can not have too big resistance, when the stall that breaks down falls or rises, then can stir at high speed, and the resistance increases rapidly, leads to the rotational speed of rotating vane to be compelled to descend, has just also led to the rotational speed of first gyro wheel to descend to ensure safety, can not fallen by high speed and produce the personal injury and death, equipment damage accident.

And the viscosity of the shear thickening fluid can be well adjusted, so that the shear thickening fluid is suitable for rotating speeds in different ranges, such as: the critical shear rate at which shear thickening of a suspension of SiO2 particles in a shear thickening fluid occurs decreases with increasing particle size and increases with increasing particle size distribution. The shear thickening strength of the SiO2 suspension decreases with increasing particle size and decreases with increasing particle size distribution. The particle size and distribution changes the shear thickening effect of the particle suspension primarily by changing the interparticle distance and the effective concentration of the particles.

Therefore, the invention can ensure that the travelling crane runs within the limited speed without overspeed dropping or lifting, and the limited speed can be adjusted by the extending amount of the rotating blade.

And the preset value can be conveniently adjusted on the ground by utilizing the adjusting mechanism and the operating piece.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIGS. 1 and 2 are perspective views of an embodiment of the present invention, showing two different orientations, respectively;

FIG. 3 is a perspective view of the frame with the running mechanism, rollers, rotary drive and part of the lifting frame removed, with the structure of the sliding mechanism highlighted;

FIG. 4 is a left side schematic view of the stall protection mechanism;

FIGS. 5 and 7 are perspective views of FIG. 4, showing two different orientations, and the housing of FIG. 7 with portions cut away to show internal structure;

FIG. 6 is a schematic cross-sectional view taken along line D-D of FIG. 4;

FIG. 8 is a perspective view of the housing with portions of the housing and portions of the swivel sleeve cut away, with emphasis on showing the internal reduction mechanism;

FIG. 9 is a front view of the operating member;

fig. 10 is a schematic view taken along a-a of fig. 9, showing the internal structure.

Detailed Description

The following detailed description of the present invention is given for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the present description is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

It is to be understood that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in the generic and descriptive sense only and not for purposes of limitation, as the term is used in the generic and descriptive sense, and not for purposes of limitation, unless otherwise specified or implied, and the specific reference to a device or element is intended to be a reference to a particular element, structure, or component. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 10, the present embodiment provides a stall-protected traveling crane, which includes:

the traveling mechanism 100 is arranged on the track and comprises a traveling frame body 110 and a traveling roller 120, and the traveling roller 120 can move along the track;

the lifting mechanism 200 is connected with the walking mechanism 100 and comprises a lifting frame body 210, a rotary driver 220 arranged on the lifting frame body 210 and a roller 230, wherein a rope body 600 is wound on the roller 230;

a sliding mechanism 500 connected to the lifting mechanism 200 and moving along with the movement of the rope 600;

the stall protection mechanism 300 is connected with the sliding mechanism 500 and wound around the rope body 600, and is used for preventing the moving speed of the rope body 600 from exceeding a preset value.

As shown in fig. 1-2, the walking rollers 120 are used to cooperate with the track, and the motor drives the walking rollers 120 to rotate, so as to move the traveling crane. The track is installed in the wall higher position in factory building, workshop, and the track can be fixed, also can remove, and this belongs to driving prior art, and this no longer gives details here. When the walking frame body 110 is long, the second walking roller 130 may be provided to enhance stability.

The drum 230 is rotated by the rotary driver 220, thereby achieving the ascent and descent of the rope body 600. The sliding mechanism 500 can move back and forth along the axial direction of the roller 230, and when the rope 600 ascends or descends, the rope 600 winds back and forth on the roller 230, so that the rope 600 can be orderly wound on the roller 230 by using the sliding mechanism.

After the rope 600 comes out of the roller 230, it goes around the stall protection mechanism 300 and then freely descends, and when the rope 600 goes up or down at an excessive speed during operation, the speed of the rope 600 is limited, so that the rope 600 is limited to operate within a preset value. The preset value can be manually set, so that a good safety protection effect is achieved, the phenomenon of out of control caused by motor faults and frequency converter faults is avoided, and equipment and personal safety are protected.

The sliding mechanism 500 may adopt a structure as shown in fig. 3, and includes:

the reciprocating screw 520 is rotatably arranged on the lifting frame body 210, is connected with the roller 230 through a transmission piece 530, and rotates along with the rotation of the roller 230;

and a slider 540 which is connected with the reciprocating lead screw 520 in a matching way and moves back and forth along with the rotation of the reciprocating lead screw 520, wherein the stall protection mechanism 300 is connected with the slider 540.

The transmission member 530 may be implemented by a pulley, a gear or a sprocket, the roller 230 drives the reciprocating screw 520 to rotate synchronously, a nut engaged with the reciprocating screw 520 is disposed in the sliding member 540, and when the reciprocating screw 520 rotates unidirectionally, the sliding member 540 is driven to move back and forth along the length direction of the reciprocating screw 520. The structure of the reciprocating screw 520 belongs to the prior art and is not described in detail herein. To achieve better sliding, two guide rods 510 may be provided, respectively located at both sides of the reciprocating screw 520, the guide rods 510 passing through the sliding member 540, and both ends connected to the lifting frame body 210 for supporting the guide rods 510.

As a further preference of the present embodiment, the stall protection mechanism 300 may adopt a structure as shown in fig. 4 to 10, which includes:

a housing 310 connected to the sliding mechanism 500 and having an accommodating space in which a non-newtonian fluid is hermetically disposed;

the speed reducing mechanism 330 comprises a rotating sleeve 331 and a rotating blade 334 arranged on the rotating sleeve 331;

the roller mechanism 350 includes a first roller 351, the first roller 351 is connected to the rotating sleeve 331, and the rope 600 is wound around the first roller 351.

As shown in fig. 6, the housing 310 may include a first housing 311 and a second housing 312 that are relatively detachable, so that the production and assembly are convenient, and the housing 310 may have a cylindrical shape. Within the housing 310. The non-Newtonian fluid is sealed, and the non-Newtonian fluid refers to a fluid which does not meet the Newtonian viscosity experiment law, namely the fluid with non-linear relation between the shear stress and the shear strain rate. In the present embodiment, it is preferable to use a shear thickening fluid, in which colloidal particles are generally in a densely packed state and are a pasty liquid, and water as a dispersion medium fills gaps between the densely arranged particles. When the applied stress is small and the flow is slow, the viscous resistance exhibited by the colloidal paste is small due to the sliding and flowing action of water. If the ion is stirred with force, the ions in the dense arrangement are disturbed at a stroke to form a porous loose arrangement structure. At this time, since the original water content can no longer fill the gaps between the particles, there is no sliding action of the water layer between the particles, and the viscous resistance increases abruptly, and even the flow property is lost. Because the particles become loosely aligned under strong shear, the apparent volume increases.

The rotating sleeve 331 of the reduction mechanism 330 is rotatably disposed in the housing 310, and rotates relative to the housing 310, and the rotating sleeve 331 may be entirely disposed in the housing 310 or a part thereof may extend out of the housing 310. The number of the rotating blades 334 may be one or more, and is set according to the requirement, and four radially uniform distribution is preferred.

The roller mechanism 350 is disposed outside the housing 310, and includes a first roller 351 and a rope 600, where the rope 600 may be a steel wire rope, or a flexible rope made of other materials, such as a nylon rope, and may be specifically selected according to a supported weight. The rope 600 may be wound around the first roller 351 one or more times, and after being wound around the first roller 351, one end of the rope is wound around the roller 230, and the other end of the rope hangs down freely to hook and hang an object. The first roller 351 is connected with the rotating sleeve 331, and when the first roller 351 rotates, the rotating sleeve 331 is driven to rotate, and the rotating blade 334 is also driven to rotate, so that the non-Newtonian fluid is stirred, and the resistance is generated.

The use method and the working principle of the embodiment are as follows:

when speed is limited, the rope 600 is wound on the roller mechanism 350, and when the rope 600 is lifted, the rope moves up and down, so that the first roller 351 is driven to rotate. The first wheel 351 is passively rotated, causing the rotor 334 to also passively rotate, stirring the non-Newtonian fluid. And non-Newtonian fluid when stirring at low speed, can not have too big resistance, when the stall that breaks down appears falls or rises, then can stir at high speed, and the resistance increases rapidly, leads to the rotational speed of rotating vane 334 to be compelled to descend, has just also led to the rotational speed of first gyro wheel 351 to descend to ensure safety, can not be fallen by high speed and produce the personal injury and death, equipment damage accident.

And the viscosity of the shear thickening fluid can be well adjusted, so that the shear thickening fluid is suitable for rotating speeds in different ranges, such as: the critical shear rate at which shear thickening of a suspension of SiO2 particles in a shear thickening fluid occurs decreases with increasing particle size and increases with increasing particle size distribution. The shear thickening strength of the SiO2 suspension decreases with increasing particle size and decreases with increasing particle size distribution. The particle size and distribution changes the shear thickening effect of the particle suspension primarily by changing the interparticle distance and the effective concentration of the particles.

It can be seen that the present invention ensures that the vehicle can operate within a limited speed without overspeeding, dropping or lifting, and that the limited speed can be adjusted by the amount of extension of the rotating blade 334.

As shown in fig. 6, in order to limit the axial position of the rotating sleeve 331 in the housing 310, the speed reducing mechanism 330 may further include:

a first axial limiting mechanism 335 coaxially arranged between the rotating sleeve 331 and the outer wall of the shell 310;

the second axial limiting mechanism 336 is coaxially disposed between the rotating sleeve 331 and the inner wall of the housing 310.

Referring to fig. 6, the rotating sleeve 331 penetrates the housing 310 at the end of the roller mechanism 350, and the first axial limiting mechanism 335 and the second axial limiting mechanism 336 are respectively disposed at the inner side and the outer side of the housing 310, and are all coaxially disposed on the rotating sleeve 331, so as to respectively limit the left direction and the right direction of the rotating sleeve 331. The rotating sleeve 331 is divided into a small section and a large section, the small section penetrates through the shell 310, the large section is used for connecting the rotating blade 334, a step is formed between the small section and the large section, and the second axial limiting mechanism 336 is just in contact with the step and is arranged between the large section and the inner wall of the shell 310.

The first axial limiting mechanism 335 and the second axial limiting mechanism 336 may be implemented by using a thrust bearing, or implemented by using other rolling elements and rolling grooves. Such as rolling bodies, between the major segments and the inner wall of the housing 310.

Through the arrangement, the axial direction of the rotating sleeve 331 is completely limited, so that the rotating sleeve 331 only can rotate relative to the shell 310 and cannot axially move, and the rotating sleeve 331 is prevented from moving randomly when the rotating sleeve is used.

As a further preferred feature of the present embodiment, in order to adjust the speed limit of the rope 600, i.e. to adjust the fluid resistance to which the rotating blade 334 rotates, the stall protection mechanism 300 may further include an adjusting mechanism 340 connected to the decelerating mechanism 330 for adjusting the fluid resistance to which the rotating blade 334 rotates.

Referring to fig. 6, one of the configurations of the adjustment mechanism 340 is illustrated:

the rotating sleeve 331 has an axial through hole and a radial sliding slot, and the rotating blade 334 is disposed in the sliding slot and can move radially with the sliding slot. The adjustment mechanism 340 includes:

the sliding rod 341 is arranged in the rotating sleeve 331 and is used for moving axially relative to the rotating sleeve 331;

one end of the connecting rod 333 is hinged with the rotating blade 334, the other end of the connecting rod 333 is hinged with the sliding rod 341, and when the connecting rod 333 swings, the rotating blade 334 is driven to move along the radial direction of the sliding chute;

one end of the first elastic piece 347 is connected with the rotating sleeve 331, and the other end of the first elastic piece 347 is connected with the sliding rod 341 and is used for providing axial tension between the rotating sleeve 331 and the sliding rod 341;

the operating member 400 connects the sliding rod 341 with the housing 310, and is used for adjusting the axial position of the sliding rod 341.

The first elastic member 347 may be implemented by a tension spring, one end of which is connected to the rotating sleeve 331 and the other end of which is connected to the sliding rod 341, or a protruding ring 346 is provided on the sliding rod 341 and the other end of the first elastic member 347 is connected to the protruding ring 346. When the speed limit is not needed, the first elastic member 347 is subjected to a pretension force, that is, the sliding rod 341 is moved to an end away from the roller mechanism 350, so that the connecting rod 333 swings, thereby retracting the rotating vane 334 into the rotating sleeve 331 fully or partially, and maintaining the position of the sliding rod 341 by means of the operating member 400. At the moment, the rope body 600 does not bear any resistance when in work, the rotating speed is the fastest, and the running speed of the rope body 600 is the fastest.

The limiting screw 148 can be arranged in the rotating sleeve 331, and the limiting screw 148 is arranged in the rotating sleeve 331, is in threaded fit with the axial through hole of the rotating sleeve 331, and is used for abutting against the axial moving position of the sliding rod 341, namely limiting the extension of the rotating blade 334.

The operating element 400 may be configured as shown in fig. 6, and includes:

a third housing 410 having an accommodating space, wherein the third housing 410 is provided with a first wire hole;

a coarse adjustment mechanism 420, including a coarse adjustment knob 421 and a coarse adjustment roller 422 connected to the coarse adjustment knob 421, where the coarse adjustment roller 422 is disposed in the third casing 410 and has a receiving space and a second wire drawing hole, the coarse adjustment knob 421 is located outside the third casing 410, and when the coarse adjustment knob 421 is rotated, the coarse adjustment roller 422 is driven to rotate;

a fine adjustment mechanism 430, including a fine adjustment knob 431 and a fine adjustment roller 432 connected to the fine adjustment knob 431, wherein the fine adjustment roller 432 is disposed in the coarse adjustment roller 422, and the fine adjustment knob 431 is disposed outside the third housing 410;

one end of the pull wire 451 penetrates through the first pull wire hole and the second pull wire hole and is connected with the fine tuning roller 432, and the other end is connected with the sliding rod 341.

Referring to fig. 10, wherein the third housing 410 may be mounted on a device, or on a wall; the speed limiting device can be held by hand, is convenient to move freely, and is convenient to operate on the ground and adjust the speed limiting value.

The pulling wire 451 may be a wire body that can be pulled and wound by a steel wire, a nylon rope, or the like. The outer periphery of the pulling wire 451 may be sleeved with a pulling wire sleeve 452 to clamp the pulling wire 451, as shown in fig. 6 and 10, one end of the pulling wire sleeve 452 is connected with the housing 310, and the other end is connected with the third housing 410. The pull sleeve 452 may be omitted if the pull wire 451 is in a straightened out stressed state. For example, when the housing 310 and the third housing 410 are fixed relative to each other and the pulling wire 451 is in a force state, the pulling wire 451 can be moved by operating the coarse adjustment mechanism 420 or the fine adjustment mechanism 430.

A gap is formed between the rough adjusting roller 422 and the inner wall of the third housing 410, the rough adjusting roller 422 is preferably cylindrical and hollow, the pull wire 451 may be wound around the rough adjusting roller 422 for one or more turns, and a groove may be formed on the outer circumferential surface of the rough adjusting roller 422 to prevent the pull wire 451 from being separated from the rough adjusting roller 422 due to an accident after being wound around the rough adjusting roller 422. When the rough adjusting knob 421 is rotated, the pulling line 451 winds around the rough adjusting roller 422, and since the rough adjusting roller 422 has a larger outer circumference, the function of rough adjusting the pulling line 451 can be achieved by a minute rotation.

The fine adjustment roller 432 and the rough adjustment roller 422 have a gap therebetween, the fine adjustment roller 432 is preferably cylindrical, the pull wire 451 may be wound around the fine adjustment roller 432 for one or more turns, and a groove may be formed on the outer circumferential surface of the fine adjustment roller 432 to prevent the pull wire 451 from being accidentally separated from the fine adjustment roller 432 after being wound around the fine adjustment roller 432. When the fine adjustment knob 431 is rotated, the pulling wire 451 is wound around the fine adjustment roller 432, and since the fine adjustment roller 432 has a smaller outer circumference, the fine adjustment of the pulling wire 451 is achieved by rotating the fine adjustment knob 431.

Wherein, coarse adjustment knob 421 can be sleeved on the periphery of fine adjustment knob 431, and the axial length of coarse adjustment knob 421 is smaller than the axial length of fine adjustment knob 431, so as to realize independent adjustment and save space.

The use method and the working principle of the embodiment are as follows:

one end of the pull wire 451 is connected with the sliding rod 341, and the other end thereof is connected with the fine tuning roller 432 after penetrating through the first pull wire hole and the second pull wire hole. When the pulling wire 451 needs to be adjusted to a large extent, the coarse adjustment knob 421 can be directly rotated to drive the coarse adjustment roller 422 to rotate, so that the pulling wire 451 winds the periphery of the coarse adjustment roller 422, and the coarse adjustment knob 421 can be rotated to a required position. Similarly, when the pulling wire 451 needs to be finely adjusted, the fine adjustment knob 431 may be slowly rotated to drive the fine adjustment roller 432 to rotate, so that the pulling wire 451 is wound around the outer circumference of the fine adjustment roller 432, and the fine adjustment knob 431 is rotated to a desired position.

It can be seen that in the present embodiment, the moving position of the sliding rod 341 can be adjusted, so as to adjust the resistance and change the speed limit value. The coarse adjustment mechanism 420 can realize large-amplitude adjustment by small-amplitude rotation, so that the adjustment time is saved, and the efficiency is improved; when accurate micro-adjustment is needed, the micro-adjustment mechanism 430 can be rotated greatly to realize small-amplitude adjustment, so that the micro-adjustment mechanism is suitable for occasions needing accurate adjustment, accurate control is easy to achieve, and accurate adjustment effect is guaranteed.

As a further preferable aspect of the present embodiment, the operation element 400 may further include:

and a clutch mechanism 440 connecting the coarse adjustment mechanism 420 and the fine adjustment mechanism 430, for coupling or decoupling the coarse adjustment mechanism 420 and the fine adjustment mechanism 430.

Sometimes, the coarse adjustment mechanism 420 and the fine adjustment mechanism 430 need to rotate synchronously, and only the coarse adjustment mechanism 420 works. Sometimes asynchronous rotation is required, and the coarse adjustment mechanism 420 and the fine adjustment mechanism 430 can work independently and can be realized through the clutch mechanism 440.

Among them, the clutch mechanism 440 may adopt a structure as shown in fig. 10, which includes:

a pressing rod 441 having one end axially penetrating through the fine adjustment mechanism 430 and the other end disposed outside the third housing 410;

a return spring 442, which is sleeved on the pressing rod 441 and is used for providing a resilient force after the pressing rod 441 is pressed;

the second link 443 is connected to the pressing rod 441 and used to engage with and disengage from the rough adjustment roller 422.

The pressing rod 441 is movable only in the axial direction and is not rotatable relative to the fine adjustment mechanism 430.

As shown in fig. 10, a plurality of grooves are formed on an end surface of the rough adjusting roller 422 to catch an end portion of the second link 443. Second link 443 may have a length equal to the cross-sectional diameter of rough adjustment roller 422 or slightly larger than the cross-sectional diameter of rough adjustment roller 422 to facilitate engagement and disengagement of rough adjustment roller 422. .

As a further preference of this embodiment, coarse adjustment mechanism 420 may further include a first positioning mechanism 423 for defining a rotational position of coarse adjustment roller 422.

Since the coarse adjustment knob 421 is forced to return by the pulling force of the wire 451 wound around the coarse adjustment roller 422 when the coarse adjustment knob 421 is rotated, so that the user needs to constantly maintain the rotation state and exert effort, in order to overcome the pulling force, a first positioning mechanism 423 may be provided.

The first positioning mechanism 423 may adopt a structure as shown in fig. 10, and includes:

a plurality of first positioning tooth grooves are formed along the outer circumferential surface of the rough adjusting roller 422;

one end of the first snap spring is clamped with the first positioning tooth groove, and the other end of the first snap spring is connected with the inner wall of the third shell 410.

As shown in fig. 10, first positioning tooth grooves are uniformly arranged on the outer peripheral surface of the rough adjusting roller 422, the first positioning tooth grooves are matched with a first snap spring, and the other end of the first snap spring can be fixedly connected with the inner wall of the third housing 410. When the rough adjusting roller 422 is rotated, the first clamp spring moves from one first positioning tooth groove to the next first positioning tooth groove after overcoming the resistance, and after the rough adjusting roller 422 is released, the first clamp spring is limited in the current first positioning tooth groove, so that the rotation position of the rough adjusting roller 422 is limited. The rough adjustment roller 422 may be fixed in a position without the user constantly maintaining the rotation state.

Similarly, the fine adjustment mechanism 430 may further include a second positioning mechanism 433 for defining the rotational position of the fine adjustment roller 432.

Since the fine adjustment knob 431 is forced to return by the pulling force of the wire 451 wound around the fine adjustment roller 432 when the fine adjustment knob 431 is rotated, so that the user needs to take effort to constantly maintain the rotated state, a second positioning mechanism 433 may be provided in order to overcome the pulling force.

The second positioning mechanism 433 may adopt a structure as shown in fig. 10, and includes:

a plurality of second positioning tooth grooves are formed along the outer circumferential surface of the fine adjustment roller 432;

one end of the second clamp spring is clamped with the second positioning tooth groove, and the other end of the second clamp spring is connected with the inner wall of the rough adjusting roller 422.

As shown in fig. 10, second positioning tooth grooves are uniformly arranged on the outer peripheral surface of the fine adjustment roller 432, the second positioning tooth grooves are matched with a second snap spring, and the other end of the second snap spring can be fixedly connected with the inner wall of the coarse adjustment roller 422. When the fine adjustment roller 432 is rotated, the second clamp spring moves from one second positioning tooth groove to the next second positioning tooth groove after overcoming the resistance, and after the fine adjustment roller 432 is loosened, the second clamp spring is limited in the current second positioning tooth groove, so that the rotation position of the fine adjustment roller 432 is limited. The fine adjustment roller 432 can be fixed in a certain position without the user constantly keeping the rotation state.

As a further preferred feature of the present embodiment, in order to ensure that the rope 600 is smooth and will not separate from the first roller 351 during the movement of the rope 600, the roller mechanism 350 may further include a second roller 352 connected to the housing 310 via a second pin 353, and the rope 600 is wound around the second roller 352.

The number of the second rollers 352 may be one, or two, preferably two, which are disposed in an up-down symmetrical manner, as shown in fig. 4, the second pin 353 is connected to the housing 310 and is fixed with respect to the housing 310, and the second rollers 352 are passively rotated by the rope 600.

The stall protection mechanism 300 may further include a roller adjustment mechanism 360 for adjusting the positions of the second roller 352 and the first roller 351.

Referring to fig. 6, a specific structure of one of the roller adjustment mechanisms 360 is shown, which includes:

a holder 361 connected with the housing 310;

an adjusting screw 362 radially penetrates the bracket 361 and the second pin 353, and is threadedly coupled to the second pin 353 to move the second roller 352 when the adjusting screw 362 is rotated.

As shown in fig. 6, the adjusting screw 362 passes through the second pin 353, and is in threaded fit with the second pin 353, the adjusting screw 362 and the bracket 361 are in smooth fit and rotate relatively, when the adjusting screw 362 is rotated, the adjusting screw 362 does not move up and down, but only rotates, so that the second pin 353 is driven to move up and down, the relative distance between the second roller 352 and the first roller 351 is adjusted, and through distance adjustment, the second roller 352 can be close to the first roller 351, and the rope 600 is compressed, so that the rope 600 is prevented from slipping.

Further, the rope sliding sleeve 363 can be further included, the rope sliding sleeve 363 is arranged on the support 361 and provided with a rope hole used for penetrating the rope 600, and one end, close to the first roller 351, of the rope hole is provided with a round chamfer. As shown in fig. 6, since the sliding sleeve 363 is relatively stationary, it can play a good guiding role to prevent the rope 600 from derailing and separating from the second roller 352 and the first roller 351 during the moving process.

Wherein, in order to strengthen the deceleration effect, still can be equipped with friction ring 313 at the inner wall of casing 310, when rotating vane 334 stretches out, can rely on the outside border of rotating vane 334, rub this friction ring 313 to further strengthen the deceleration effect, frictional elasticity can be adjusted through stop screw 148, when stop screw 148 was more outwards removed, rotating vane 334 then stretched out more, and is that the friction is more severe.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. It should be noted that there are no specific structures but a few objective structures due to the limited character expressions, and that those skilled in the art may make various improvements, decorations or changes without departing from the principle of the invention or may combine the above technical features in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.

Claims (17)

1. A stall-protected vehicle, comprising:

the walking mechanism (100) is arranged on the track and comprises a walking frame body (110) and walking rollers (120), and the walking rollers (120) can move along the track;

the lifting mechanism (200) is connected with the walking mechanism (100) and comprises a lifting frame body (210), a rotary driver (220) and a roller (230), wherein the rotary driver (220) and the roller (230) are arranged on the lifting frame body (210), and a rope body (600) is wound on the roller (230);

a sliding mechanism (500) connected to the lifting mechanism (200) and moving along with the movement of the rope body (600);

the stall protection mechanism (300) is connected with the sliding mechanism (500) and wound around the rope body (600) and used for preventing the moving speed of the rope body (600) from exceeding a preset value.

2. A stall-protected travelling crane according to claim 1, wherein the sliding mechanism (500) comprises:

the reciprocating screw rod (520) is rotatably arranged on the lifting frame body (210), is connected with the roller (230) through a transmission piece (530), and rotates along with the rotation of the roller (230);

the sliding piece (540) is connected with the reciprocating lead screw (520) in a matched mode and moves back and forth along with the rotation of the reciprocating lead screw (520), and the stall protection mechanism (300) is connected with the sliding piece (540).

3. A stall-protected travelling crane according to claim 1 or 2, wherein the stall-protection mechanism (300) comprises:

a housing (310) connected to the sliding mechanism (500) and having an accommodating space in which a non-Newtonian fluid is sealingly disposed;

the speed reducing mechanism (330) comprises a rotating sleeve (331) and a rotating blade (334) arranged on the rotating sleeve (331);

the roller mechanism (350) comprises a first roller (351), the first roller (351) is connected with the rotary sleeve (331), and the rope body (600) is wound through the first roller (351).

4. The stall-protected row vehicle of claim 3, wherein the stall protection mechanism (300) further comprises:

and the adjusting mechanism (340) is connected with the speed reducing mechanism (330) and is used for adjusting the fluid resistance received when the rotating blade (334) rotates.

5. The stall-protected row vehicle of claim 3, wherein the roller mechanism (350) further comprises:

and the second roller (352) is connected with the shell (310) through a second pin shaft (353), and the rope body (600) is wound through the second roller (352).

6. The stall-protected row vehicle of claim 5, wherein the stall protection mechanism (300) further comprises:

and the roller adjusting mechanism (360) is used for adjusting the positions of the second roller (352) and the first roller (351).

7. The stall-protected row vehicle of claim 6, wherein the roller adjustment mechanism (360) comprises:

a bracket (361) connected with the housing (310);

and the adjusting screw (362) radially penetrates through the bracket (361) and the second pin shaft (353) and is in threaded connection with the second pin shaft (353), and the second roller (352) is moved when the adjusting screw (362) is rotated.

8. The stall-protected row vehicle of claim 7, wherein the roller adjustment mechanism (360) further comprises:

the rope body sliding sleeve (363) is arranged on the support (361) and is provided with a rope body hole used for penetrating the rope body (600), and one end, close to the first roller (351), of the rope body hole is provided with a round chamfer.

9. The stall-protected vehicle according to claim 4, wherein the rotating sleeve (331) has an axial through hole and a radial runner, and the adjusting mechanism (340) comprises:

the sliding rod (341) is arranged in the rotating sleeve (331) and is used for axially moving relative to the rotating sleeve (331);

one end of the connecting rod (333) is hinged with the rotating blade (334), the other end of the connecting rod (333) is hinged with the sliding rod (341), and when the connecting rod (333) swings, the rotating blade (334) is driven to move along the radial direction of the sliding chute;

the first elastic piece (347) is connected with the rotating sleeve (331) at one end and connected with the sliding rod (341) at the other end and used for providing axial tension between the rotating sleeve (331) and the sliding rod (341);

and the operating piece (400) is connected with the sliding rod (341) and the shell (310) and is used for adjusting the axial position of the sliding rod (341).

10. The stall-protected row vehicle according to claim 9, wherein the operating member (400) comprises:

the third shell (410) is provided with an accommodating space, and a first wire drawing hole is formed in the third shell (410);

the coarse adjustment mechanism (420) comprises a coarse adjustment knob (421) and a coarse adjustment roller (422) connected with the coarse adjustment knob (421), the coarse adjustment roller (422) is arranged in the third shell (410) and is provided with a containing space and a second wire drawing hole, the coarse adjustment knob (421) is positioned outside the third shell (410), and when the coarse adjustment knob (421) is rotated, the coarse adjustment roller (422) is driven to rotate;

the fine adjustment mechanism (430) comprises a fine adjustment knob (431) and a fine adjustment roller (432) connected with the fine adjustment knob (431), the fine adjustment roller (432) is arranged in the coarse adjustment roller (422), and the fine adjustment knob (431) is positioned outside the third shell (410);

one end of the pull wire (451) penetrates through the first pull wire hole and the second pull wire hole and is connected with the fine adjustment roller (432), and the other end of the pull wire is connected with the sliding rod (341).

11. The stall-protected row vehicle according to claim 10, wherein the operating member (400) further comprises:

and the clutch mechanism (440) is connected with the coarse adjustment mechanism (420) and the fine adjustment mechanism (430) and is used for coupling or separating the coarse adjustment mechanism (420) and the fine adjustment mechanism (430).

12. The stall-protected vehicle of claim 11, wherein the clutch mechanism (440) comprises:

a pressing rod (441), one end of which axially penetrates through the fine adjustment mechanism (430), and the other end of which is arranged outside the third shell (410);

the return spring (442) is sleeved on the pressing rod (441) and used for providing resilience force after the pressing rod (441) is pressed;

and a second link (443) connected to the pressing rod (441) and configured to engage with and disengage from the rough adjustment roller (422).

13. The stall-protected row vehicle of claim 10, wherein the coarse adjustment mechanism (420) further comprises:

a first positioning mechanism (423) for defining a rotational position of the coarse wheel (422).

14. The stall-protected row vehicle of claim 10, wherein the fine-tuning mechanism (430) further comprises:

a second positioning mechanism (433) for defining a rotational position of the fine adjustment roller (432).

15. The stall-protection traveler according to claim 13, wherein the first positioning mechanism (423) comprises:

a plurality of first positioning tooth grooves are arranged along the outer peripheral surface of the rough adjusting roller (422);

and one end of the first clamping spring (423) is clamped with the first positioning tooth groove, and the other end of the first clamping spring is connected with the inner wall of the third shell (410).

16. The stall-protected row vehicle according to claim 14, wherein the second positioning mechanism (433) comprises:

a plurality of second positioning tooth grooves are arranged along the outer peripheral surface of the fine adjustment roller (432);

and one end of the second clamp spring (433) is clamped with the second positioning tooth groove, and the other end of the second clamp spring is connected with the inner wall of the rough adjusting roller (422).

17. The stall-protected row vehicle according to claim 10, wherein the operating member (400) further comprises:

and the pull line sleeve (452) is sleeved on the pull line (451), one end of the pull line sleeve is connected with the shell (310), and the other end of the pull line sleeve is connected with the third shell (410).

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