Lifting mechanism and moving tool with same

Abstract

The utility model relates to a lifting mechanism and a moving tool. The lifting mechanism comprises a first support, a second support and a hinge component connected between the first support and the second support. The hinge component comprises a torsion spring, a limiting piece, a locking piece, a first support of at least partial structure and a second support of at least partial structure, the torsion spring comprises a first torsion arm and a second torsion arm, the limiting piece sequentially penetrates through the second support, the torsion spring and the first support, and under locking and fixing of the locking piece, the first support and the second support are connected in a hinged mode; the first support is provided with a first blocking face abutting against the first torsion arm, and the second support is provided with a second blocking face abutting against the second torsion arm. The first torsion arm and the second torsion arm are always kept in an elastic deformation state, in the process, the first blocking face is used for providing first abutting force for the first torsion arm to prevent the first torsion arm from restoring to the natural extending state, and the second blocking face is used for providing second abutting force for the second torsion arm to prevent the second torsion arm from restoring to the natural extending state.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mobile tools, in particular to a lifting mechanism and a mobile tool with the same. BACKGROUND

[0002] Automatic driving is a popular field in recent years. With the formulation and implementation of relevant national policies, the automatic driving technology develops rapidly in the field of environmental sanitation. More and more mobile tools are tested on the road. The cleaning mechanism of the mobile tool, such as the water suction scraper assembly, the rolling brush assembly and the disc brush assembly, needs to be lowered in the working state and maintain a certain ground pressure. After the work is completed, it is raised to ensure the passability of the vehicle, which is more suitable for the field of automatic driving.

[0003] The cleaning module of the existing mobile tool, such as the water suction scraper assembly, the rolling brush assembly and the disc brush assembly, is generally matched with a lifting mechanism in application. When the scrubber or the scrubber vehicle is working, the height can be adjusted through the lifting mechanism arranged on the cleaning module, so that the cleaning module can adapt to different ground environments and prevent the cleaning module from being scratched, thereby reducing the service life of the cleaning module.

[0004] The existing lifting mechanism is usually a parallel linkage or a linear bearing mechanism, which maintains the ground pressure by using compression springs or tension springs. The overall space occupation is large, and there are many structural parts, resulting in large assembly tolerance. Furthermore, the existing lifting mechanism has high requirements for the service life of the spring or the tension spring, and the cost is high. CONTENT OF THE UTILITY MODEL

[0005] The present application provides a lifting mechanism and a mobile tool with the same to solve the technical problems of the existing lifting mechanism, such as more and more complex structural parts, resulting in large assembly tolerance, and high requirements for the service life of the spring or the tension spring, and high cost.

[0006] The lifting mechanism provided by the present application comprises a first support, a second support and a hinge member connected between the first support and the second support. The hinge member comprises a torsional spring, a limiting piece, a locking piece, at least part of the structure of the first support and at least part of the structure of the second support. The torsional spring comprises a first torsional arm and a second torsional arm. The limiting piece passes through the second support, the torsional spring and the first support in sequence, and is locked and fixed by the locking piece, so that the first support and the second support are hingedly connected. The first support has a first blocking surface abutting against the first torsional arm, and the second support has a second blocking surface abutting against the second torsional arm. The first torsional arm and the second torsional arm always maintain an elastic deformation state. In the process, the first blocking surface provides a first abutting force for the first torsional arm to block the first torsional arm from returning to a natural extended state, and the second blocking surface provides a second abutting force for the second torsional arm to block the second torsional arm from returning to a natural extended state.

[0007] The first support includes a first assembly space surrounded by a first vertical plate, a second vertical plate and a third vertical plate, the first vertical plate and the third vertical plate are oppositely arranged and connected to the two sides of the second vertical plate respectively, the second support includes a second assembly space surrounded by a fourth vertical plate, a fifth vertical plate and a sixth vertical plate, the fourth vertical plate and the sixth vertical plate are oppositely arranged and connected to the two sides of the fifth vertical plate respectively, the first assembly space and the second assembly space are arranged in an overlapping manner, the third vertical plate and the fourth vertical plate are oppositely arranged, and the third vertical plate and the fourth vertical plate both have a through hole for mounting the limiting piece.

[0008] The first blocking surface is formed on the second vertical plate, and the second blocking surface is formed on the fifth vertical plate.

[0009] During the approaching movement of the second support towards the first support, the top surface of the sixth vertical plate extending out of the second vertical plate can abut against the side edge of the third vertical plate, so as to limit the minimum angle between the second support and the first support.

[0010] The first support includes a first mounting surface and two first vertical plates connected below the first mounting surface, the second vertical plate is connected between the two first vertical plates, and the third vertical plate includes two third vertical plates, both of which are located outside the first vertical plate and connected to one side of the corresponding second vertical plate.

[0011] The second vertical plate is configured in a bent structure, and the second vertical plate includes a second mounting surface for abutting against the first torsion arm.

[0012] The second vertical plate further includes a third mounting surface located above the second mounting surface, and the third mounting surface is arranged in a spaced manner with the first mounting surface.

[0013] The lifting mechanism further includes a driving member and a connecting support for supporting the driving member, and the connecting support is connected to the first mounting surface and / or the third mounting surface.

[0014] The second support includes the fifth vertical plate, a pair of fourth vertical plates and a pair of sixth vertical plates, the second support further includes a fourth mounting surface located below the fifth vertical plate and connected with the fifth vertical plate to form a stepped plane, and each fourth vertical plate is connected to one side of the stepped plane for facing the first support.

[0015] The lifting mechanism further comprises a chain and a pulley, one end of the chain is connected with the output end of the driving member, the other end of the chain is connected with the fourth mounting surface, and the pulley is used for providing a sliding guide channel for the chain.

[0016] The lifting mechanism further comprises a mounting bracket, the mounting bracket is mounted on the first mounting surface of the first bracket, and the mounting bracket is used for positioning and mounting the pulley at a preset position.

[0017] The lifting mechanism further comprises a connecting member, the connecting member comprises a screw rod, a pin shaft and an adjusting nut, the pin shaft is used for limiting and mounting the head of the screw rod at the output end of the chain, and the adjusting nut is used for limiting and mounting the threaded portion of the screw rod at the fourth mounting surface of the second bracket.

[0018] The first bracket and the second bracket are integrally formed by carbon steel tailor welding, stainless steel plate tailor welding or integral die casting.

[0019] The utility model discloses still provide a kind of mobile tool, it includes the lifting mechanism of preceding, still include cleaning module, the cleaning module is mounted below the second bracket of the lifting mechanism, and the cleaning module includes water absorption spud assembly, roll brush assembly and disc brush assembly.

[0020] The above technical solution provided by the embodiments of the present application has the following advantages compared with the prior art:

[0021] The lifting mechanism and the mobile tool provided by the embodiments of the present application consider that a lifting mechanism with lifting function can be formed by assembling fewer structural members. In the lifting mechanism provided by the present application, the first bracket, the second bracket and the hinged member connected between the first bracket and the second bracket are included. The hinged member includes the torsion spring, the limiting member, the locking member, the first bracket with at least partial structure and the second bracket with at least partial structure. Specifically, the torsion spring includes the first torsion arm and the second torsion arm. The limiting member passes through the second bracket, the torsion spring and the first bracket in sequence, and the first bracket and the second bracket are hingedly connected under the locking and fixing of the locking member. In this way, the torsion torque in the opening and closing movement of the second bracket relative to the first bracket is transmitted by the torsion spring, the space occupation of the horizontal space or the vertical space of the lifting mechanism is not required, and the spring ring of the torsion spring does not need to be stretched or compressed, so that the ground pressure of the scrubber can be balanced. At the same time, the number of structural members for overall assembly is less, and the assembly tolerance can be limited within a controllable range. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments consistent with the present utility model, and together with the specification serve to explain the principles of the present utility model.

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0024] One or more embodiments are exemplarily illustrated by the pictures in the drawings corresponding thereto, which do not constitute a limitation to the embodiments. The elements with the same reference numerals in the drawings represent similar elements, and the drawings do not constitute a proportional limitation unless specifically stated.

[0025] Figure 1 The shaft side structure schematic of the lifting mechanism provided for the embodiments of the present application Figure 1 ;

[0026] Figure 2 The shaft side structure schematic of the lifting mechanism provided for the embodiments of the present application Figure 2 ;

[0027] Figure 3 The front view structure schematic of the lifting mechanism provided for the embodiments of the present application.

[0028] Explanation of reference numerals:

[0029] 10, lifting mechanism; 1, first support; 11, first blocking surface; 11A, first vertical plate; 12A, second vertical plate; 13A, third vertical plate; 1A, first assembly space; 111A, first mounting surface; 121A, second mounting surface; 122A, third mounting surface; 2, second support; 21, second blocking surface; 22, fourth mounting surface; 21A, fourth vertical plate; 22A, fifth vertical plate; 23A, sixth vertical plate; 2A, second assembly space; 3, hinged member; 31, torsion spring; 311, first torsion arm; 312, second torsion arm; 32, limiting member; 33, locking member; 4, driving member; 5, connecting support; 6, chain; 7, pulley; 8, mounting support; 9, connecting member; 91, screw rod; 92, pin shaft; 93, adjusting nut. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the scope of protection of the present application.

[0031] The disclosure below provides many different embodiments or examples for implementing various configurations of the present application. For the sake of simplicity, the description below refers to specific examples in order to provide a thorough understanding of the present application. It will be apparent, however, that the description includes only a few examples and is not intended to limit the present application. Furthermore, the present application can be used in various examples without departing from the scope thereof. In the following description, like or similar components of the examples have the same reference numerals. The use of the same reference numerals in different examples indicates similar or like components in the different examples.

[0032] For the sake of description, spatial relative terms can be used herein to describe the relative position relationship or movement of one element or feature with respect to another element or feature as shown in the drawings, such as "internal", "external", "inner side", "outer side", "under", "below", "upper", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is flipped over or the posture is changed or the movement state is changed, the directional indications will also change accordingly, for example: the element described as "under" or "below" another element or feature will be oriented as "above" or "above" another element or feature. Therefore, the example term "below" can include both the upper and lower positions. The device can be additionally oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein are interpreted accordingly.

[0033] The lifting mechanism provided by the embodiments of the present application can be applied to a mobile tool.

[0034] Illustratively, the mobile tool can be all devices with the ability to move, including vehicles with automatic driving or intelligent driving (including passenger vehicles (such as cars, buses, minibuses, etc.), cargo vehicles (such as ordinary trucks, vans, drop trailers, enclosed trucks, tank trucks, flatbed trucks, container trucks, self-unloading trucks, special structure trucks), special vehicles (such as logistics distribution vehicles, automated guided vehicles AGV, patrol vehicles, cranes, cranes, excavators, bulldozers, shovels, road rollers, loaders, off-road engineering vehicles, armored engineering vehicles, sewage treatment vehicles, sanitation vehicles, dust suction vehicles, washing vehicles, watering vehicles, sweeping robots, food delivery robots, shopping guide robots, lawn mowers, golf carts, etc.), entertainment vehicles (such as entertainment vehicles, amusement park automatic driving devices, balance cars, etc.), rescue vehicles (such as fire engines, ambulances, power repair vehicles, engineering rescue vehicles, etc.) and robots (such as sweeping robots, food delivery robots, etc.) and the like.

[0035] The following is a further description of the lifting mechanism applied to an automatic driving washing vehicle.

[0036] The automatic driving scrubber is a new type of cleaning equipment that combines advanced automatic driving technology and professional scrubbing function. It is usually equipped with various sensors such as laser radar, camera, and millimeter wave radar, which can accurately perceive the surrounding environment, realize autonomous path planning and obstacle avoidance, and perform efficient cleaning operations on various indoor and outdoor grounds such as shopping malls, factories, schools, and streets according to the preset route without human operation. The scrubbing system of the automatic driving scrubber includes high-performance brush discs and powerful water absorption devices, which can quickly remove dust, stains, and garbage on the ground, and has the advantages of high cleaning efficiency, good effect, labor cost saving, and labor intensity reduction, etc., and is an important equipment for promoting the intelligent development of the cleaning industry.

[0037] In order to adapt to different ground conditions, match different cleaning tasks, protect equipment and ground during cleaning, and facilitate maintenance and replacement of parts, a lifting mechanism is provided on the automatic driving scrubber.

[0038] The existing lifting mechanisms generally include two types:

[0039] One of them is a parallel link mechanism, which generally consists of four links, two pairs of which are arranged in parallel. When a power source (such as a motor-driven crank rod) rotates one of the links, the other links will move accordingly. Due to the structural characteristics of the parallel link mechanism, the cleaning component mounting rack and other components connected thereto will make a relatively stable linear lifting motion, thereby realizing the lifting and lowering of the cleaning components of the scrubber. After the cleaning components of the scrubber are lowered to contact the ground, if the ground is uneven or other conditions cause the cleaning components to be subjected to an upward force, the parallel link mechanism will transmit this force to the compression spring or tension spring connected thereto. The compression spring is compressed or the tension spring is stretched, and the spring generates a reverse elastic force, which will always have a pressure on the cleaning components to maintain the pressure on the ground.

[0040] The other one is a linear bearing mechanism, which mainly consists of a guide shaft, a steel ball retainer, an outer shell, balls, and sealing washers. When an external force (such as a motor through a transmission device) acts on the component connected to the linear bearing, the balls will roll between the guide shaft and the outer shell. Due to the high precision straightness of the guide shaft and the rolling characteristics of the balls, the cleaning components connected thereto can make precise linear lifting motion along the guide shaft. When the cleaning components of the scrubber are lowered to the ground, if the ground conditions cause the cleaning components to be subjected to an upward impact or displacement trend, the linear bearing mechanism will transmit this force to the compression spring or tension spring. The compression spring is compressed or the tension spring is stretched, and the spring generates an elastic force, which is transmitted to the cleaning components through the connection structure of the linear bearing, so that the cleaning components maintain the contact pressure with the ground to adapt to different ground conditions and ensure the cleaning effect.

[0041] In summary, in the two kinds of automatic driving lifting mechanisms in the prior art, the parallel linkage mechanism and the linear bearing mechanism have many components, resulting in large assembly tolerance; and the parallel linkage mechanism and the linear bearing mechanism in the prior art occupy a large height space, and cannot install a tensile rope; according to the force analysis, the compression spring or the tension spring needs to change in the length direction to balance the ground pressure, and the service life of the compression spring or the tension spring is required to be long and high.

[0042] To alleviate the above problems, the application provides a lifting mechanism and an automatic driving floor cleaning vehicle, which does not need to use a compression spring or a tension spring or a linkage mechanism and a linear bearing mechanism with many components, can balance the ground pressure, and has fewer components and significantly reduced assembly tolerance.

[0043] Reference Figures 1-3 The embodiment of the application provides a lifting mechanism 10, which comprises a first support 1, a second support 2 and a hinged member 3 connected between the first support 1 and the second support 2; it should be noted that under the action of the hinged member 3, the first support 1 and the second support 2 can rotate within a preset angle range with the hinged point as the center; for example, the hinged point can be one, two or more, and the scheme of the lifting mechanism 10 of the application will be further described below with the hinged point having two as an example.

[0044] The hinged member 3 of the application can be composed of a single structure or can be formed by assembling a plurality of components, and the hinged member 3 will be described in detail below with the example that the hinged member 3 comprises a plurality of components.

[0045] Specifically, the hinged member 3 of the embodiment of the application comprises a torsion spring 31, a limiting member 32, a locking member 33, a first support 1 with at least part of the structure and a second support 2 with at least part of the structure, wherein the torsion spring 31 comprises a first torsion arm 311 and a second torsion arm 312, and the limiting member 32 passes through the second support 2, the torsion spring 31 and the first support 1 in sequence. It should be noted that the torsion spring 31 here refers to the coil of the torsion spring 31. Under the locking and fixing of the locking member 33, that is, the locking member 33 can be used to lock the torsion spring 31 between the first support 1 and the second support 2, so that the first support 1 and the second support 2 are hingedly connected; in this way, the first support 1 and the second support 2 can rotate with the hinged point as the center.

[0046] Exemplarily, the limiting member 32 can be any one of a shoulder bolt, a limiting pin, a circlip, a positioning key or a set screw, or the limiting member 32 can also be a graphite copper sleeve, a pin shaft 92 or the like; the locking member 33 can be any one of a lock nut, a spring washer, a combination of a slotted nut and a split pin, a stop washer, a series of steel wires, a double self-locking washer and a threaded locking glue, which can not only ensure the strength but also provide the rotation function. The torsion spring 31 can be made of spring steel or stainless steel wire, and different wire diameters can also meet different requirements of the ground pressure.

[0047] Considering the installation state of the torsion spring 31 between the first support 1 and the second support 2, the first support 1 of the embodiment has a first blocking surface 11 abutting against the first torsion arm 311, and the second support 2 has a second blocking surface 21 abutting against the second torsion arm 312; the first torsion arm 311 and the second torsion arm 312 always maintain an elastic deformation state, and in the process, the first blocking surface 11 is used to provide a first abutting force for the first torsion arm 311 to block the first torsion arm 311 from restoring to a natural extended state, and the second blocking surface 21 is used to provide a second abutting force for the second torsion arm 312 to block the second torsion arm 312 from restoring to a natural extended state.

[0048] It should be noted that the first torsion arm 311 and the second torsion arm 312 of the embodiment always maintain an elastic deformation state. Exemplarily, when the torsion spring 31 is in a non-deformation state, the first torsion arm 311 and the second torsion arm 312 are in a natural extended state relative to the torsion spring 31. Exemplarily, when the first torsion arm 311 and the second torsion arm 312 are in the natural extended state, the included angle α between the first torsion arm 311 and the second torsion arm 312 can be set according to the actual application requirements. Exemplarily, the angle α can be 180° or any angle β less than 180°. In this way, in the lifting mechanism 10 of the application, the included angle α between the first torsion arm 311 and the second torsion arm 312 is set to be an angle less than β, so that the first abutting force between the first blocking surface 11 and the first torsion arm 311 and the second abutting force between the second blocking surface 21 and the second torsion arm 312 are formed, that is, the first torsion arm 311 and the second torsion arm 312 always maintain an elastic deformation state. The first abutting force and the second abutting force can be set according to actual needs.

[0049] The first support 1 and the second support 2 of the embodiment are connected together by two coaxial shoulder bolts and lock nuts, and the first support 1 and the second support 2 can rotate around the shoulder bolts, and a torsion spring 31 is sleeved on each of the two shoulder bolts, and by limiting the installation angle of the torsion spring 31, different ground pressures can be achieved.

[0050] The lifting mechanism 10 provided in the embodiment of the present application is assembled by using less structural members to realize the lifting function. The lifting mechanism 10 provided in the present application comprises a first support 1, a second support 2 and a hinged member 3 connected between the first support 1 and the second support 2. The hinged member 3 comprises a torsion spring 31, a limiting member 32, a locking member 33, the first support 1 and the second support 2. Specifically, the torsion spring 31 comprises a first torsion arm 311 and a second torsion arm 312. The limiting member 32 passes through the second support 2, the torsion spring 31 and the first support 1 in sequence and is locked and fixed by the locking member 33, so that the first support 1 and the second support 2 are hingedly connected. In this way, the torsion spring 31 is used to transmit the torque in the opening and closing movement of the second support 2 relative to the first support 1, so that the balance of the ground pressure of the scrubber can be realized without occupying the horizontal or vertical space of the lifting mechanism 10 and without stretching or compressing the spring ring of the torsion spring 31. Meanwhile, the overall assembly structural members are less and the assembly tolerance can be limited within a controllable range.

[0051] Considering the specific structural scheme of the first support 1 and the second support 2, the first support 1 comprises a first assembly space 1A surrounded by a first vertical plate 11A, a second vertical plate 12A and a third vertical plate 13A. The first vertical plate 11A and the third vertical plate 13A are oppositely arranged and connected to the two sides of the second vertical plate 12A, respectively. The second support 2 comprises a second assembly space 2A surrounded by a fourth vertical plate 21A, a fifth vertical plate 22A and a sixth vertical plate 23A. The fourth vertical plate 21A and the sixth vertical plate 23A are oppositely arranged and connected to the two sides of the fifth vertical plate 22A, respectively. The first assembly space 1A and the second assembly space 2A are arranged in an overlapping manner. The third vertical plate 13A and the fourth vertical plate 21A are oppositely arranged and have through holes for mounting the limiting member 32 on the third vertical plate 13A and the fourth vertical plate 21A. The first blocking surface 11 is formed on the second vertical plate 12A and the second blocking surface 21 is formed on the fifth vertical plate 22A.

[0052] In this way, the torsion spring 31 can be mounted in the first assembly space 1A and the second assembly space 2A. Then, the torsion spring 31 is stably limited in the first assembly space 1A and the second assembly space 2A by the limiting member 32 and the locking member 33. The torsion spring 31 is the pivot for transmitting the force of the hinged rotation between the first support 1 and the second support 2. It does not need to be stretched or compressed in the first assembly space 1A and the second assembly space 2A, that is, it does not need to reserve a horizontal or vertical stretching space in the lifting mechanism 10. The service life of the torsion spring 31 is higher, which can improve the service life of the lifting mechanism 10.

[0053] In the process of rotation between the first support 1 and the second support 2 relative to the hinge point, no interference problem occurs. In the lifting mechanism 10 of the present application, in the process of close moving of the second support 2 towards the first support 1, the top surface of the sixth vertical plate 23A extending from the second vertical plate 12A can abut against the side edge of the third vertical plate 13A, for limiting the minimum angle between the second support 2 and the first support 1.

[0054] Exemplarily, the overall structure of the first support 1 and the second support 2 can be obtained through an integral molding process, and through the abutment relationship between the sixth vertical plate 23A and the side edge of the third vertical plate 13A, the minimum angle of a obtained by the relative rotation between the first support 1 and the second support 2 can be limited, so as to prevent the interference and collision between the first support 1 and the second support 2.

[0055] Considering the specific structure of the first support 1, in the lifting mechanism 10 of the present application, the first support 1 comprises a first mounting surface 111A and two first vertical plates 11A connected below the first mounting surface 111A, the second vertical plate 12A is connected between the two first vertical plates 11A, and the third vertical plate 13A comprises two, both of which are located outside the first vertical plate 11A and connected with one side of the corresponding second vertical plate 12A; the second vertical plate 12A is configured as a bent structure, and comprises a second mounting surface 121A for abutting against the first torsion arm 311; in addition, the second vertical plate 12A further comprises a third mounting surface 122A located above the second mounting surface 121A, and the third mounting surface 122A is arranged in a spaced manner with the first mounting surface 111A; the lifting mechanism 10 further comprises a driving member 4 and a connecting support 5 for supporting the driving member 4, and the connecting support 5 is connected to the first mounting surface 111A and / or the third mounting surface 122A.

[0056] Exemplarily, the driving member 4 can be any one of a push rod motor, a hydraulic cylinder, an electro-hydraulic push rod, an air cylinder, or an air spring strut. Exemplarily, the driving member 4 is a push rod motor, also known as an electric push rod or a linear push rod, which is an electric drive device for converting the rotary motion of a motor into the linear reciprocating motion of a push rod. The motor serves as a power source to provide rotary power for the push rod motor, and common motors include DC motors and AC motors. The transmission mechanism is composed of gears, screws, nuts, etc. The rotary motion of the motor is transmitted to the screw after being decelerated by the gear, and the screw cooperates with the nut to convert the rotary motion into the linear motion of the nut. The nut is connected with the push rod to drive the push rod to move linearly. The push rod, as a component directly executing linear motion, is usually made of metal material and has certain strength and rigidity, and can be connected with an external load to realize pushing and pulling actions. The control device controls the forward and reverse rotation and speed of the motor, and thus controls the extension, retraction, speed, and position of the push rod. Exemplarily, the push rod motor can also be configured with a limit switch to prevent the push rod from exceeding the limit position.

[0057] When the motor of the push rod motor is powered on, the motor starts to rotate, and the output shaft of the motor drives the gear transmission mechanism to operate. After multi-stage gear deceleration, the speed is reduced and the torque is increased, and then the screw is transmitted. The screw rotates in the nut, and since the nut is fixedly connected with the push rod and can only move linearly on the screw, the rotary motion of the screw is converted into the linear motion of the push rod, realizing the extension or retraction action of the push rod, thereby pushing or pulling the object connected therewith to move linearly.

[0058] Considering the specific structural composition of the second support 2, in the lifting mechanism 10 of the embodiment, the second support 2 includes a fifth vertical plate 22A, a pair of fourth vertical plates 21A, and a pair of sixth vertical plates 23A. The second support 2 further includes a fourth mounting surface 22, which is located below the fifth vertical plate 22A and connected with the fifth vertical plate 22A to form a stepped plane. Each fourth vertical plate 21A is connected to one side of the stepped plane facing the first support 1.

[0059] In this way, the pair of fourth vertical plates 21A and the pair of sixth vertical plates 23A can facilitate the formation of two hinge points between the first support 1 and the second support 2, making the rotating action between the two more stable. In addition, the fourth mounting surface 22 is located below the fifth vertical plate 22A and connected with the fifth vertical plate 22A to form a stepped plane, which can further reduce the occupied space of the second support 2.

[0060] Considering the actual application scenarios of the lifting mechanism 10, various situations may be encountered. In the lifting mechanism 10 of the present application, a chain 6 and a pulley 7 are further included. One end of the chain 6 is connected to the output end of the driving member 4, and the other end of the chain 6 is connected to the fourth mounting surface 22. The pulley 7 is used to provide a sliding guide channel for the chain 6.

[0061] For example, the chain 6 can be used to realize power transmission and synchronous motion. The chain 6 can transmit power from a driving device (such as a motor) to components that need to be lifted, i.e., the second support 2 and the cleaning module mounted below the second support 2, such as a roller brush support or a brush head. At the same time, it ensures that multiple components remain synchronized during lifting to avoid stuttering, tilting, or damage caused by desynchronization. For example, a scrubber with multiple sections of lifting columns, the chain 6 connects each section of the column so that they can be extended or retracted synchronously.

[0062] For example, the chain 6 can be used for precise positioning and height adjustment. By controlling the transmission length and number of turns of the chain 6, the lifting height of the brush head or other components of the scrubber can be accurately adjusted to adapt to different cleaning scenarios and ground conditions. For example, when encountering low furniture or obstacles, the brush head height can be precisely lowered for cleaning; when cleaning ordinary ground, the brush head can be adjusted to the appropriate height to ensure cleaning effectiveness and efficiency.

[0063] For example, the chain 6 can enhance structural stability. The chain 6 has certain strength and toughness, which can support and tighten the lifting mechanism 10, enhancing the stability and reliability of the entire lifting mechanism 10. It prevents components from shaking, deviating, or falling during lifting, ensuring the safety and stability of the scrubber during operation.

[0064] For example, the chain 6 can be used for buffering and shock absorption. During lifting, the chain 6 can absorb and disperse part of the impact force and vibration generated by the lifting action, reducing damage to other components of the scrubber, reducing noise and wear, and prolonging the service life of the scrubber.

[0065] For example, the chain 6 can be used for overload protection. When the lifting mechanism 10 encounters an overload or excessive resistance, the chain 6 may slip, which can protect the motor and other transmission components from damage to some extent, serving as an overload protection function.

[0066] Considering the installation scheme of the pulley 7 between the first support 1 and the second support 2, the lifting mechanism 10 of the present application further includes a mounting bracket 8. The mounting bracket 8 is mounted to the first mounting surface 111A of the first support 1. The mounting bracket 8 is used to position and install the pulley 7 at a predetermined position.

[0067] It should be noted that the preset position is arranged in the close area along the push rod pushing direction of the push rod motor, or the preset position is the position close to the first support 1 in the opening area between the first support 1 and the second support 2.

[0068] Considering the connection scheme of the chain 6 and the second support 2, the lifting mechanism 10 of the present application further comprises a connecting member 9, the connecting member 9 comprising a screw rod 91, a pin shaft 92 and an adjusting nut 93, the pin shaft 92 being used for limiting and mounting the head of the screw rod 91 to the output end of the chain 6, and the adjusting nut 93 being used for limiting and mounting the threaded part of the screw rod 91 to the fourth mounting surface 22 of the second support 2.

[0069] In summary, considering the lifting mechanism 10 of the present application, there are two hinge points between the first support 1 and the second support 2, that is, two sets of hinge members 3 are arranged, specifically, the two hinge members 3 are connected together through two coaxial shoulder bolts and lock nuts, and can rotate around the shoulder bolts, one torsional spring 31 is sleeved on each of the two shoulder bolts, and different ground pressures can be achieved by limiting the installation angle of the torsional spring 31. Further, the first support 1 and the second support 2 can be made of carbon steel welding, stainless steel plate welding or integral die casting. The rotating connection between the first support 1 and the second support 2 can use shoulder bolts, graphite copper sleeves, pin shafts 92 and other parts, which can not only ensure the strength but also provide the rotation function. The torsional spring 31 in the hinge member 3 can be made of spring steel, stainless steel wire, etc., and different wire diameters can also meet different ground pressure requirements. In addition, the push rod motor is fixed on the first support 1 through the pin shaft 92, the push rod part is connected to the second support 2 through the connecting support 5, the chain 6, the screw rod 91 and the adjusting nut 93, and the chain 6 slides around the pulley 7 fixed on the mounting support 8, so that the chain 6 can smoothly slide during the extension and retraction operation of the push rod motor, the load of the motor is reduced, and the lifting operation of the cleaning module is completed; finally, the lifting mechanism 10 is fixed under the chassis of the scrubber, the second support 2 can fix the cleaning module such as the water suction scraper module, the roller brush module and the disc brush module, the structure is simple, the occupied space is small, the maintenance is convenient, and at the same time, a certain ground pressure can also be maintained under the action of the rebound force of the torsional spring 31.

[0070] The embodiment of the present application also provides a mobile tool, which comprises the aforementioned lifting mechanism 10 and further comprises a cleaning module, the cleaning module being installed below the second support 2 of the lifting mechanism 10, and the cleaning module comprising a water suction scraper assembly, a roller brush assembly and a disc brush assembly, and being capable of achieving all the effects of the aforementioned lifting mechanism 10, which will not be described herein.

[0071] Specifically, the cleaning module such as the water suction scraper assembly, the roller brush assembly and the disc brush assembly of the mobile tool of the embodiment of the present application needs to fall in the working state and maintain a certain ground pressure, and is lifted after the work is completed to ensure the passability of the vehicle, which is more suitable for the automatic driving field.

[0072] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order

[0073] Although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0074] The foregoing is merely illustrative of the principles of the application and various modifications can be made by those skilled in the art without departing from the spirit and scope of the application. The above embodiments are illustrative of the only the preferred embodiments employing the principles of the application. Numerous modifications and adaptations thereof will be apparent to those skilled in the art without departing from the spirit and scope of the application.

Claims

1. A lifting mechanism, characterized in that The lifting mechanism (10) comprises a first support (1), a second support (2) and a hinged member (3) connected between the first support (1) and the second support (2); The hinged member (3) comprises a torsion spring (31), a limiting member (32), a locking member (33), the first support (1) and the second support (2) which are partially structured, the torsion spring (31) comprises a first torsion arm (311) and a second torsion arm (312), the limiting member (32) passes through the second support (2), the torsion spring (31) and the first support (1) in sequence, and the first support (1) and the second support (2) are hingedly connected under the locking and fixing of the locking member (33); The first support (1) has a first blocking surface (11) abutting against the first torsion arm (311), and the second support (2) has a second blocking surface (21) abutting against the second torsion arm (312); the first torsion arm (311) and the second torsion arm (312) always maintain an elastic deformation state, and in the process, the first blocking surface (11) is used to provide a first abutting force for the first torsion arm (311) to block the first torsion arm (311) from returning to a natural extended state, and the second blocking surface (21) is used to provide a second abutting force for the second torsion arm (312) to block the second torsion arm (312) from returning to a natural extended state.

2. The lifting mechanism of claim 1, wherein, The first support (1) comprises a first assembly space (1A) surrounded by a first vertical plate (11A), a second vertical plate (12A) and a third vertical plate (13A), the first vertical plate (11A) and the third vertical plate (13A) are oppositely arranged and respectively connected to two sides of the second vertical plate (12A), the second support (2) comprises a second assembly space (2A) surrounded by a fourth vertical plate (21A), a fifth vertical plate (22A) and a sixth vertical plate (23A), the fourth vertical plate (21A) and the sixth vertical plate (23A) are oppositely arranged and respectively connected to two sides of the fifth vertical plate (22A), the first assembly space (1A) and the second assembly space (2A) are arranged in an overlapping manner, and the third vertical plate (13A) and the fourth vertical plate (21A) are oppositely arranged and each have a via hole for mounting the limiting member (32); The first blocking surface (11) is formed on the second vertical plate (12A), and the second blocking surface (21) is formed on the fifth vertical plate (22A).

3. The lifting mechanism of claim 2, wherein, During the approaching movement of the second support (2) towards the first support (1), a top surface of the sixth vertical plate (23A) extending out of the second vertical plate (12A) can abut against a side edge of the third vertical plate (13A) for limiting the minimum angle between the second support (2) and the first support (1).

4. The lifting mechanism of claim 2, wherein, The first support (1) comprises a first mounting surface (111A) and two first vertical plates (11A) connected below the first mounting surface (111A), the second vertical plate (12A) is connected between the two first vertical plates (11A), and the third vertical plate (13A) comprises two third vertical plates (13A), each of which is located outside the first vertical plate (11A) and connected to one side of the corresponding second vertical plate (12A); The second vertical plate (12A) is configured as a bent structure, and comprises a second mounting surface (121A) for abutting against the first torsion arm (311); The second vertical plate (12A) further comprises a third mounting surface (122A) located above the second mounting surface (121A), and the third mounting surface (122A) is arranged in a spaced manner with the first mounting surface (111A); The lifting mechanism (10) further comprises a driving member (4) and a connecting support (5) for supporting the driving member (4), and the connecting support (5) is connected to the first mounting surface (111A) and / or the third mounting surface (122A).

5. The lifting mechanism of claim 4, wherein, The second support (2) comprises the fifth vertical plate (22A), the pair of fourth vertical plates (21A) and the pair of sixth vertical plates (23A), and further comprises a fourth mounting surface (22) located below the fifth vertical plate (22A) and connected to the fifth vertical plate (22A) to form a stepped surface, and each fourth vertical plate (21A) is connected to one side of the stepped surface for facing the first support (1).

6. The lifting mechanism of claim 5, wherein, The lifting mechanism (10) further comprises a chain (6) and a pulley (7), one end of the chain (6) is connected to the output end of the driving member (4), the other end of the chain (6) is connected to the fourth mounting surface (22), and the pulley (7) is used to provide a sliding guide channel for the chain (6).

7. The lifting mechanism of claim 6, wherein, The lifting mechanism (10) further comprises a mounting support (8) mounted on the first mounting surface (111A) of the first support (1), and the mounting support (8) is used to position and install the pulley (7) at a predetermined position.

8. The lifting mechanism of claim 6, wherein, The lifting mechanism (10) further comprises a connecting member (9) comprising a screw rod (91), a pin shaft (92) and an adjusting nut (93), the pin shaft (92) is used to limit and install the head of the screw rod (91) on the output end of the chain (6), and the adjusting nut (93) is used to limit and install the threaded portion of the screw rod (91) on the fourth mounting surface (22) of the second support (2).

9. The lift mechanism of claim 7, wherein, The first support (1) and the second support (2) are configured as an integral structure formed by carbon steel tailor welding, stainless steel plate tailor welding or integral die casting.

10. A mobile tool, characterized by The lifting mechanism (10) as claimed in any one of claims 1-9, further comprising a cleaning module, the cleaning module being mounted below the second support (2) of the lifting mechanism (10), the cleaning module comprising a water absorption scraper assembly, a rolling brush assembly and a disc brush assembly.

Images