Electric wheel side brake for a crane

Abstract

The application provides a kind of electric wheel edge brake for crane, it relates to brake field, the application includes pedestal;Brake arm, it is movably arranged in pedestal;Brake assembly is connected to brake arm, when brake arm is movable relative to pedestal, brake assembly can be driven to contact with running wheel to realize braking;And drive reset mechanism is connected to brake arm, for driving brake arm to rotate relative to pedestal, so that brake assembly contacts or separates from running wheel;Wherein, brake assembly includes movable part, fixed part and locking piece, movable part is movably connected to fixed part;Locking piece is used to lock movable part and fixed part;When locking piece is triggered, movable part and fixed part are unlocked, so that movable part can be movable to running wheel side.The application compared with prior art has improved the braking efficiency of crane, and through gradually reducing speed avoids the equipment damage or operation risk caused by overhasty braking advantage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of brakes, in particular to an electric wheel edge brake for cranes. BACKGROUND

[0002] With the rapid development of domestic economy, portal cranes are widely used in large-scale loading and unloading sites such as railway freight yards, ports and wharfs. These cranes are mainly used for handling long, heavy and bulky goods and containers, and bear important transportation and loading and unloading tasks. However, strong convective weather and instantaneous sudden gales often occur in coastal areas. Such extreme weather conditions pose a serious challenge to the stability of the crane, especially under the action of strong wind force, which can easily cause the overall crane to tip over, resulting in serious safety accidents.

[0003] In order to cope with this risk, the current portal crane generally uses an electric wheel edge brake to prevent the wheel from rolling on the track, thereby improving the braking capacity and resisting the influence of strong wind. This braking system enhances the stability of the crane in bad weather by applying additional braking force, ensuring that the crane does not move or overturn easily under strong wind conditions.

[0004] However, the existing electric wheel edge brake has the problem of complex operation in actual application. In an emergency, the operator may not be able to quickly and accurately brake or release the brake, which to some extent affects the emergency response speed and operation efficiency of the crane. SUMMARY

[0005] In order to solve the problem of being unable to quickly brake or release the brake, the present application provides an electric wheel edge brake for cranes.

[0006] The present application provides an electric wheel edge brake for cranes, which adopts the following technical solution:

[0007] An electric wheel edge brake for cranes is applied to a crane, and the crane includes a walking wheel, comprising:

[0008] a base;

[0009] a brake arm movably arranged on the base;

[0010] a brake assembly connected to the brake arm, when the brake arm moves relative to the base, the brake assembly can be driven to contact the walking wheel to achieve braking; and

[0011] a driving reset mechanism connected to the brake arm, for driving the brake arm to rotate relative to the base, so that the brake assembly contacts or separates from the walking wheel;

[0012] The brake assembly comprises a movable part, a fixed part and a locking member, the movable part is movably connected to the fixed part, and an elastic member is arranged between the movable part and the fixed part to make the movable part always have a movement trend towards the walking wheel side;

[0013] The locking member is used to lock the movable part and the fixed part, when the movable part and the fixed part are locked, the surfaces of the movable part and the fixed part towards the walking wheel side are flush; when the locking member is triggered, the movable part and the fixed part are unlocked, so that the movable part can move towards the walking wheel side.

[0014] Preferably, the movable part is provided with a convex structure at the position for contacting the walking wheel, and the area for contacting the walking wheel is smoothly arranged.

[0015] Preferably, the movable part is provided with a heating structure, which can at least increase the temperature of the position of the movable part for contacting the walking wheel.

[0016] Preferably, the movable part is provided with a heating part, which is at least partially located on the fixed part towards the walking wheel side, and the fixed part is provided with a receiving groove.

[0017] When the fixed part contacts the walking wheel, at least part of the heating part is located between the receiving groove and the walking wheel.

[0018] Preferably, the heating part comprises a first elastic part and a second elastic part, and the first elastic part and the second elastic part are located between the fixed part and the walking wheel.

[0019] When the fixed part contacts the walking wheel, the first elastic part and the second elastic part can be deformed to contact under the pressure of the receiving groove and the walking wheel, the first elastic part is provided with a first electrode, and the second elastic part is provided with a second electrode; when the first elastic part and the second elastic part are deformed to contact, the first electrode and the second electrode are connected, so that the heating part located in the receiving groove generates heat.

[0020] Preferably, the movable part is slidably connected to the fixed part, the movable part is provided with a slot, the locking member comprises a bolt and an electromagnet, and the bolt is slidably arranged on the fixed part.

[0021] When the bolt is located in the slot, the movable part and the fixed part are locked, a reset key is arranged between the bolt and the fixed part, and the reset key can make the bolt move towards the slot side.

[0022] The electromagnet is arranged on the fixed part, and when the electromagnet is electrified, the plug pin is moved in a direction away from the plug slot, so that the movable part and the fixed part are unlocked.

[0023] Preferably, the plug pin is provided with a guide slope, and when the fixed part moves towards the walking wheel side, the plug pin can enter the plug slot under the action of the guide slope.

[0024] Preferably, the fixed part is connected to the brake arm through a first hinge shaft, the base is connected with a connecting rod through a second hinge shaft, the end of the connecting rod away from the base is connected with the fixed part through a third hinge shaft, and the base is connected with the brake arm through a fourth hinge shaft.

[0025] The first hinge shaft, the second hinge shaft, the third hinge shaft and the fourth hinge shaft are parallel to each other, and when the brake arm rotates relative to the base, the fixed part moves towards the walking wheel side.

[0026] Preferably, the connecting rod is made of plastic metal material, and the connecting rod can be deformed when the stress exceeds a set value.

[0027] Preferably, the driving reset mechanism comprises a driving motor and an electronic clutch, the driving motor is used to drive the brake arm to rotate, and the electronic clutch is used to lock the output shaft of the driving motor, so that the driving motor cannot drive the brake arm to rotate.

[0028] And / or, the movable part and the fixed part are provided with brake shoes at the positions where the movable part and the fixed part contact the walking wheel.

[0029] And / or, a travel switch is arranged between the brake arm and the base.

[0030] The application has the following advantages and beneficial effects:

[0031] The application has the following advantages and beneficial effects:

[0032] The preliminary braking relies on the close contact between the movable part and the walking wheel to generate friction force, effectively slowing down the rotation speed of the walking wheel. Due to the limited contact force of the elastic member and the movable part, the movable part can only gradually slow down the speed of the walking wheel, thereby avoiding mechanical impact or crane swinging caused by sudden and severe braking. As the fixed part continues to move, the force of the elastic member on the movable part gradually increases, further enhancing the braking effect and ensuring that the speed of the walking wheel gradually decreases to near zero. When the speed of the walking wheel is low or stopped, the fixed part is in full contact with the walking wheel, and the fixed part and the movable part work together to achieve complete braking, ensuring that the walking wheel no longer moves, thereby achieving a smooth and efficient braking effect.

[0033] This design not only improves the braking efficiency of the crane, but also avoids equipment damage or operation risks caused by sudden braking by gradually reducing the speed. In addition, since the speed reduction effect of the movable part on the walking wheel during preliminary braking is limited, it can ensure that the speed of the walking wheel is at a low level or zero when the fixed part is in full contact with the walking wheel, thereby reducing the risk of the crane swinging due to rapid braking and improving safety and stability.

[0034] The heating design provides temperature rise when needed to remove ice and snow layers and enhance the friction between the fixed part and the walking wheel; when heating is not needed, the elastic member deformation energy-saving control system balances braking control and temperature management, avoiding energy waste and ensuring accurate braking. The connecting rod is made of plastic metal material and can deform when the stress exceeds the set value, which is convenient for adjusting the contact surface orientation of the fixed part and the movable part with the walking wheel during maintenance, facilitating repair. This design improves system adaptability and simplifies long-term maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0035] 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, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0036] Figure 1 is the first structural schematic diagram of the embodiment of the present application, mainly showing the protruding structure.

[0037] Figure 2 is the second structural schematic diagram of the embodiment of the present application.

[0038] Figure 3 is the third structural schematic diagram of the embodiment of the present application.

[0039] Figure 4 is the structural schematic diagram of the present brake arm.

[0040] Figure 5 is an exploded schematic view of a brake assembly.

[0041] Figure 6 is a partial sectional view of a brake assembly.

[0042] Figure 7 is Figure 6 is an enlarged structural schematic view of part A in

[0043] is marked as:

[0044] 100, base; 110, fourth hinge shaft; 200, brake arm; 210, first hinge shaft; 220, travel switch; 300, brake assembly; 310, fixed part; 311, accommodating groove; 320, movable part; 321, protruding structure; 322, heating part; 322a, first elastic part; 322b, second elastic part; 323, insertion slot; 330, elastic member; 340, locking member; 341, bolt; 341a, guide slope; 342, electromagnet; 343, reset key; 350, brake shoe; 400, driving reset mechanism; 410, driving motor; 420, electronic clutch; 500, connecting rod; 510, second hinge shaft; 520, third hinge shaft. DETAILED DESCRIPTION

[0045] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0046] The terms "first", "second" and the like in the description and claims of the present application are used to distinguish similar objects, and are not used to describe a particular order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second" and the like are generally of a kind, and are not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally represents that the front and rear associated objects are in an "or" relationship.

[0047] The embodiment of the present application provides an electric wheel edge brake for a crane, which is suitable for a crane, especially a gantry crane. The gantry crane comprises a walking wheel, and the brake of the present application is installed on the gantry crane and used for reducing and braking the walking wheel.

[0048] Specifically, refer to Figure 1 、 Figure 2 The brake comprises a base 100, a brake arm 200, a brake assembly 300 and a drive reset mechanism 400. The base 100 can be installed on a crane, and the installation method can be a detachable installation or a fixed method such as welding.

[0049] In some embodiments, the brake arm 200 is rotatably connected to the base 100. The brake assembly 300 is connected to the brake arm 200, and the drive reset mechanism 400 is connected to the brake arm 200 and can drive the brake arm 200 to rotate relative to the base 100. When the drive reset mechanism 400 drives the brake arm 200 to rotate, the brake assembly 300 can be moved closer to or away from the travel wheel. In this way, the brake assembly 300 can be brought into contact with or separated from the travel wheel, thereby braking or releasing the travel wheel.

[0050] It should be noted that the drive reset mechanism 400 can utilize existing technologies, such as hydraulic or electric, which all facilitate relative rotation of the brake arm 200. During this process, when the brake assembly 300 contacts the running wheels, it can decelerate and brake. When the brake assembly 300 is separated from the running wheels, braking is eliminated, ensuring the flexibility and safety of crane operation.

[0051] In some embodiments, reference Figure 2 、 Figure 3 The brake assembly 300 includes a movable portion 320, a fixed portion 310, and a locking member 340. The movable portion 320 is movably connected to the fixed portion 310. An elastic member 330 is disposed between the movable portion 320 and the fixed portion 310 to ensure that the movable portion 320 always has a tendency to move toward the travel wheel. The elastic member 330 helps improve the response speed and adaptability of the brake assembly 300, ensuring that the movable portion 320 can quickly approach and contact the travel wheel when braking is required.

[0052] The locking member 340 is used to lock the movable part 320 and the fixed part 310, and when the movable part 320 and the fixed part 310 are locked, the surfaces of the movable part 320 and the fixed part 310 towards the walking wheel side are flush. The reason for this design is that when the movable part 320 and the fixed part 310 are both in contact with the walking wheel, the surfaces of the movable part 320 and the fixed part 310 towards the walking wheel side are exactly flush, at this time, the relative position between the movable part 320 and the fixed part 310 is the same as that when locked, thereby facilitating relocking. At the same time, after being locked when the movable part 320 and the fixed part 310 are both in contact with the walking wheel, the movable part 320 and the fixed part 310 can be locked and separated together with the walking wheel when they are separated from the walking wheel, thereby achieving the effect of quickly unlocking the walking wheel. This design can achieve the effect of quick locking when the walking wheel needs to be locked, and achieve the effect of quick unlocking when the walking wheel needs to be unlocked.

[0053] It can be understood that in the embodiment, the surfaces of the walking wheel in contact with the movable part 320 and the fixed part 310 are flat. Therefore, when the movable part 320 and the fixed part 310 are both in contact with the walking wheel, the surfaces of the movable part 320 and the fixed part 310 towards the walking wheel side are exactly flush. The reason for this design is that by ensuring that the movable part 320 and the fixed part 310 have the same contact surface when they contact the walking wheel, the relative position between them can be ensured to remain consistent, thereby facilitating the relocking of the locking member 340.

[0054] Specifically, when the movable part 320 and the fixed part 310 are both in contact with the walking wheel, due to the flush contact surfaces of the two, their relative position is the same as that in the initial locked state, which helps to quickly and accurately restore the locking, thereby achieving an efficient braking function. This design ensures the coordinated work of the movable part 320 and the fixed part 310, and improves the stability and reliability of the entire braking process, especially in the case of quick recovery of locking or unlocking, it can avoid the operation delay or inaccuracy caused by inconsistent position.

[0055] When the movable part 320 is in contact with the walking wheel, the fixed part 310 moves towards the walking wheel side, which can gradually compress the elastic member 330, thereby storing elastic potential energy. The next time braking is needed, the elastic member 330 can quickly drive the movable part 320 to contact the walking wheel, improve the braking response speed, enhance the braking accuracy, and ensure the stability and safety of the braking process. Exemplarily, the elastic member 330 can be a spring.

[0056] When the locking member 340 is triggered, the movable part 320 is disengaged from the fixed part 310, so that the movable part 320 can move towards the walking wheel. At this time, the movable part 320 will quickly approach the walking wheel and contact the walking wheel, achieving a preliminary braking effect. In addition, in some special areas, the walking wheel may be covered with ice. By allowing the movable part 320 to quickly impact the walking wheel, the ice layer on the surface of the walking wheel can be broken, thereby helping to reduce or remove the ice at the contact point between the fixed part 310 and the walking wheel, improving the friction between the fixed part 310 and the walking wheel, and thus improving the braking effect on the walking wheel, avoiding the situation that the walking wheel cannot be braked when there is ice.

[0057] Through this design, the contact between the movable part 320 and the walking wheel can achieve braking more quickly and effectively, and after the lock is released, the movable part 320 can adaptively adjust the contact force through the action of the elastic member 330, avoiding excessive braking or producing a jarring braking effect. This structure helps to improve braking accuracy, reduce impact on the crane, and ensure smoothness and safety of operation.

[0058] According to an optional embodiment, referring to Figure 1 , Figure 4 , the movable part 320 is provided with a protruding structure 321 at the contact point with the walking wheel, and the area where the protruding structure 321 contacts the walking wheel is smoothly arranged. The protruding structure 321 is used to reduce the contact area between the ice layer and the walking wheel when it contacts the walking wheel, thereby increasing the pressure at the contact point and promoting the breaking of the ice layer. This design enables the movable part 320 to more effectively break the ice layer when there is an ice layer on the surface of the walking wheel, ensuring that the subsequent braking effect is not affected by the ice layer.

[0059] At the same time, the area where the protruding structure 321 contacts the walking wheel is smoothly arranged, which helps to avoid damage to the surface of the walking wheel when the protruding structure 321 slides on the walking wheel. Through this design, the braking effect of the movable part 320 when it contacts the walking wheel can be improved, and the surface of the walking wheel can be effectively protected, prolonging its service life. This structure is particularly important in cold environments, as it ensures that the braking system of the crane can still operate stably and efficiently even in icy conditions.

[0060] According to an optional embodiment, the movable part 320 is provided with a heating structure (not shown in the figure), which can at least increase the temperature of the contact point between the movable part 320 and the walking wheel. Through the heating structure, the temperature of the movable part 320 can be effectively increased, thereby removing or reducing the ice layer at the contact area between the walking wheel and the movable part 320. This can ensure that the contact area between the movable part 320 and the walking wheel is within an appropriate temperature range in cold environments, thereby improving the braking effect.

[0061] Specifically, the heating structure prevents the reduced friction in the contact area between the movable portion 320 and the running wheels due to low temperatures in cold regions, which could affect braking performance. The heating structure maintains the temperature in the contact area within a reasonable range, ensuring sufficient friction for stable braking. This design helps improve braking performance in low-temperature conditions, ensuring reliable operation of the crane in various environments and avoiding the risk of poor braking due to ice or low temperatures.

[0062] It is understandable that the heating structure not only helps to eliminate icing, but also improves the working efficiency of the entire braking system in cold areas and enhances braking accuracy, thereby ensuring the smoothness and safety of crane operation.

[0063] According to an alternative embodiment, referring to Figure 3 、 Figure 4 The movable portion 320 is provided with a heating portion 322, which is at least partially located on the side of the fixed portion 310 facing the travel wheel. The fixed portion 310 is provided with a receiving groove 311. When the fixed portion 310 is in contact with the travel wheel, at least a portion of the heating portion 322 is located between the receiving groove 311 and the travel wheel. The heating portion 322 can increase the temperature of the fixed portion 310, thereby effectively increasing the contact temperature between the fixed portion 310 and the travel wheel, thereby enhancing the braking effect between the two.

[0064] Specifically, the heating unit 322 increases the temperature of the fixing unit 310, thereby improving the friction between the fixing unit 310 and the running wheel. In cold environments, the low temperature in the contact area between the fixing unit 310 and the running wheel may lead to insufficient friction, thus affecting braking effectiveness. The heating unit 322 ensures that the temperature of the contact area remains within a reasonable range, increasing friction and thus improving braking efficiency.

[0065] This design not only ensures a suitable contact temperature between the movable portion 320 and the travel wheel, but also raises the temperature of the fixed portion 310 to a certain extent, further optimizing the braking performance between the fixed portion 310 and the travel wheel. This structure is particularly suitable for use in low-temperature environments, ensuring the stability and reliability of the crane's braking system in cold weather.

[0066] According to an alternative embodiment, referring to Figure 5 、 Figure 6The heating part 322 includes a first elastic part 322a and a second elastic part 322b, which are located between the fixed part 310 and the walking wheel. When the fixed part 310 is in contact with the walking wheel, the first elastic part 322a and the second elastic part 322b can be deformed in contact under the pressure of the accommodating groove 311 and the walking wheel. The first elastic part 322a is provided with a first electrode, and the second elastic part 322b is provided with a second electrode; when the first elastic part 322a and the second elastic part 322b are deformed in contact, the first electrode and the second electrode are connected, so that the heating part 322 located in the accommodating groove 311 generates heat. This design enables the first elastic part 322a and the second elastic part 322b to act as a switch of the circuit when they are in contact. When they are deformed, the first electrode and the second electrode are connected, thereby starting the heating function of the heating part 322, thereby increasing the temperature of the contact area between the fixed part 310 and the walking wheel.

[0067] This design of the heating part 322 can significantly improve the working efficiency of the brake in cold environments, especially in the case of ice or snow on the surface of the walking wheel. The increase in temperature can effectively remove the ice or snow layer, thereby enhancing the friction between the fixed part 310 and the walking wheel and improving the braking effect. At the same time, the heating effect of the heating part 322 can also keep the temperature of the contact area between the fixed part 310 and the walking wheel within a reasonable range, avoiding the decrease of friction caused by low temperature, thereby ensuring the stability and reliability of the braking effect.

[0068] In some application scenarios, especially to avoid the speed of the walking wheel being too fast, it is necessary to accurately control the moving speed of the walking wheel. In this case, only the movable part 320 can be in contact with the walking wheel, while the fixed part 310 maintains a certain distance from the walking wheel. By adjusting the distance between the fixed part 310 and the walking wheel, the compression amount of the elastic member 330 can be controlled, thereby changing the friction between the movable part 320 and the walking wheel. In this way, appropriate resistance can be provided for the walking wheel by controlling the friction without the fixed part 310 contacting the walking wheel, thereby helping to smoothly control the speed of the walking wheel.

[0069] When the fixed part 310 is not in contact with the walking wheel, the fixed part 310 does not need to brake the walking wheel, so it does not need to heat the fixed part 310. In this case, the first elastic part 322a and the second elastic part 322b will not be subjected to the extrusion force between the fixed part 310 and the walking wheel, so they will not be deformed. Without deformation, the first electrode and the second electrode will not be in contact, and the current will not flow, so the heating function will not be triggered. Through this design, energy waste is avoided in the case of not needing heating, thereby effectively saving energy consumption and improving the energy efficiency of the overall system.

[0070] In summary, this heating design not only provides effective temperature rise when heating is needed to remove the ice and snow layer that may exist, thereby improving the friction between the fixed part 310 and the walking wheel, but also effectively saves energy by controlling the system working state through the deformation of the elastic member 330 when heating is not needed. In this way, the system can achieve a good balance between efficient braking control and temperature management, avoid unnecessary energy waste, and at the same time provide precise braking effect and operation control.

[0071] It can be understood that an electric heating pipe is arranged in the movable part 320 and the heating part 322. The working principle of the electric heating pipe is to generate heat by passing electric current through a conductor with high resistance. Specifically, when electric current passes through the conductor, the electric energy is converted into heat energy due to the high resistance of the conductor, thereby raising the temperature of the heating part 322. Through this heating structure, temperature regulation of the movable part 320 and the fixed part 310 can be achieved, especially in cold environments, to ensure that the temperature of the movable part 320 and the fixed part 310 can be maintained within a suitable range, thereby effectively improving the braking performance.

[0072] It can be understood that the first elastic part 322a and the second elastic part 322b are made of metal material, which has good elasticity and durability. Its main function is to adapt to the extrusion force by elastic deformation when it is extruded by the fixed part 310 and the walking wheel, and quickly restore to its original state after the extrusion is removed. This design can ensure stable working state during long-term use, avoiding material fatigue or damage caused by frequent deformation. Through the design of elastic deformation, the first elastic part 322a and the second elastic part 322b can effectively cooperate with the braking system to provide appropriate pressure and response, while saving energy and prolonging the service life of the equipment.

[0073] According to an optional embodiment, referring to Figure 5 , Figure 7 The movable part 320 is slidingly connected to the fixed part 310, the movable part 320 is provided with a slot 323, the locking member 340 includes a bolt 341 and an electromagnet 342, and the bolt 341 is slidingly arranged in the fixed part 310. By entering and exiting the slot 323 through the bolt 341, the locking and unlocking between the movable part 320 and the fixed part 310 can be achieved.

[0074] When the latch 341 is located in the slot 323, the movable portion 320 and the fixed portion 310 are locked. A reset button 343 is provided between the latch 341 and the fixed portion 310. The reset button 343 can move the latch 341 toward the slot 323. Specifically, the reset button 343 functions to constantly force the latch 341 toward the slot 323, ensuring that the latch 341 aligns with and enters the slot 323, thereby locking the movable portion 320 and the fixed portion 310. Exemplarily, the reset button 343 is a spring.

[0075] Reference Figure 5 、 Figure 7 Electromagnet 342 is disposed in fixed portion 310. When energized, electromagnet 342 causes latch 341 to move away from slot 323, thereby unlocking movable portion 320 and fixed portion 310. When energized, electromagnet 342 generates a strong magnetic field, which in turn drives latch 341 away from slot 323, unlocking movable portion 320 and fixed portion 310. The strong magnetic force generated by electromagnet 342 exerts a strong attraction on latch 341, overcoming the elastic force of reset button 343 and causing latch 341 to disengage from slot 323, thereby unlocking movable portion 320 and fixed portion 310.

[0076] The advantage of this design is that the electronic control function of electromagnet 342 can quickly and reliably complete the locking and unlocking operations, avoiding the wear and operational complexity associated with traditional mechanical locking member 340. In addition, the reset button 343 provides an additional safeguard, ensuring that the latch 341 automatically returns to its original position and locks in the event of a power outage, thereby increasing system reliability.

[0077] It is understood that when the electromagnet 342 drives the latch 341 to move, a significant force is required because the movement of the latch 341 must overcome the elastic force of the reset button 343 and any friction. To this end, the electromagnet 342 provides a momentary high voltage, generating a strong magnetic field and a strong magnetic force. This overcomes these resistances and drives the latch 341 away from the slot 323. This strong magnetic force effectively overcomes the elastic restoring force of the reset button 343, ensuring that the latch 341 can quickly disengage from the slot 323, thereby releasing the lock between the movable portion 320 and the fixed portion 310.

[0078] In addition, in order to ensure that the latch 341 can smoothly complete the movement and receive sufficient force, mechanical principles such as the lever principle can be used in the design to further optimize the driving process of the latch 341. Through the lever principle, the magnetic force of the electromagnet 342 can be amplified through the lever device, so that the latch 341 can obtain sufficient moving force under the smaller pushing force of the electromagnet 342. This design helps to improve the efficiency of the unlocking operation, reduce the power consumption of the electromagnet 342, and ensure the stability and reliability of the system.

[0079] In this way, the electromagnet 342 can provide sufficient power to release the locking of the fixed part 310 and the movable part 320, achieve fast and reliable operation, and improve the response speed and accuracy of the overall braking system.

[0080] According to an optional embodiment, referring to Figure 5 , Figure 7 The latch 341 is provided with a guide slope 341a, and when the fixed part 310 moves towards the walking wheel, the latch 341 can enter the slot 323 under the action of the guide slope 341a. Through the design of the guide slope 341a, the latch 341 can smoothly enter the slot 323 when the fixed part 310 moves. This not only helps to improve the accuracy of the locking process, but also effectively avoids the failure of locking due to the relative movement between the fixed part 310 and the movable part 320. When the surfaces of the fixed part 310 and the movable part 320 in contact with the walking wheel are flush, the latch 341 is aligned with the slot 323 and enters the slot 323 under the action of the reset key 343, thereby achieving reliable locking.

[0081] Specifically, after the fixed part 310 and the movable part 320 are unlocked, the fixed part 310 will gradually approach the walking wheel, and the surface of the fixed part 310 towards the walking wheel side will gradually approach the surface of the movable part 320 in contact with the walking wheel. When the fixed part 310 contacts the walking wheel, the surfaces of the fixed part 310 and the movable part 320 in contact with the walking wheel will be flush, at which time the guide slope 341a causes the latch 341 to retract and align with the slot 323. When the surfaces of the fixed part 310 and the movable part 320 in contact with the walking wheel are flush, the latch 341 is aligned with the slot 323, and under the action of the reset key 343, the latch 341 smoothly enters the slot 323, completing the locking of the fixed part 310 and the movable part 320.

[0082] This design ensures that when the brake is released, the fixed part 310 and the movable part 320 can smoothly move away from the walking wheel and quickly release the brake without unnecessary delay or friction, improving the response speed of the system. At the same time, since the movable part 320 and the fixed part 310 are effectively locked together, the system can quickly recover to the predetermined working state during the next braking, enhancing the continuity and stability of the braking.

[0083] According to an optional embodiment, referring to Figure 1 , Figure 2 , the fixed part 310 is connected to the brake arm 200 through the first hinge shaft 210, the base 100 is connected with the connecting rod 500 through the second hinge shaft 510, the end of the connecting rod 500 away from the base 100 is connected with the fixed part 310 through the third hinge shaft 520, and the base 100 is connected with the brake arm 200 through the fourth hinge shaft 110.

[0084] The first hinge shaft 210, the second hinge shaft 510, the third hinge shaft 520 and the fourth hinge shaft 110 are parallel to each other. When the brake arm 200 rotates relative to the base 100, the fixed part 310 faces the walking wheel side. Through the parallel first hinge shaft 210, the second hinge shaft 510, the third hinge shaft 520 and the fourth hinge shaft 110, the connecting line of the four hinge shafts can form a quadrilateral or parallelogram structure. When the brake arm 200 rotates, the contact surface of the fixed part 310 and the movable part 320 always faces the walking wheel, so that it can be ensured that the fixed part 310 and the movable part 320 can always contact the walking wheel during braking, avoiding the situation that effective braking cannot be performed due to misalignment. Therefore, this structure is beneficial to ensure the accuracy and stability of the braking process.

[0085] According to an optional embodiment, the connecting rod 500 is made of plastic metal material, and the connecting rod 500 can deform when the stress exceeds a set value. Before and after the fixed part 310 and the movable part 320 contact the walking wheel, a certain impact force is received, which can cause the fixed part 310 and the movable part 320 to rotate relative to the brake arm 200 to a certain extent. The plasticity of the connecting rod 500 enables it to deform when stressed, thereby adapting to a certain rotation and keeping the surface of the fixed part 310 and the movable part 320 contacting the walking wheel always facing the walking wheel. This design helps to provide higher flexibility during braking and ensures that the contact surface is always accurately aligned with the walking wheel, thereby achieving effective braking.

[0086] At the same time, the plastic metal material of the connecting rod 500 also brings advantages in maintenance. Since it can deform when the stress exceeds a set value, the orientation of the contact surface of the fixed part 310 and the movable part 320 with the walking wheel can be adjusted as needed during subsequent maintenance, facilitating the repair of the contact surface. This adjustable design further enhances the adaptability of the system and the convenience of long-term use and maintenance.

[0087] According to an optional embodiment, referring to Figure 2 , Figure 3The driving reset mechanism 400 includes a driving motor 410 and an electronic clutch 420. The driving motor 410 is used to drive the rotation of the brake arm 200, and the electronic clutch 420 is used to lock the output shaft of the driving motor 410, so that the driving motor 410 cannot drive the rotation of the brake arm 200. When the brake arm 200 needs to be locked, the electronic clutch 420 can be locked by controlling the current flow or other mechanisms to prevent the driving motor 410 from continuing to drive the rotation of the brake arm 200, ensuring that the system remains stationary when further rotation is not required. Conversely, when it is necessary to unlock and reset, the electronic clutch 420 can be unlocked to enable the driving motor 410 to resume operation and continue to drive the rotation of the brake arm 200. With this design, the reset mechanism can efficiently and accurately control the interaction between the driving motor 410 and the brake arm 200, improving the response speed and stability of the entire braking system.

[0088] According to an optional embodiment, the movable part 320 and the fixed part 310 are provided with brake shoes 350 at the contact with the walking wheels. The provision of brake shoes 350 can effectively improve the braking efficiency and enhance the friction between the movable part 320, the fixed part 310 and the walking wheels. During braking, the friction between the brake shoes 350 and the walking wheels can quickly reduce the rotational speed of the walking wheels, thereby achieving a fast and smooth braking effect. The design of the brake shoes 350 can also improve the wear resistance of the system, reduce the wear caused by direct contact with metal parts, and prolong the service life of the braking system. According to different requirements, the brake shoes 350 can also be made of different materials to meet the braking requirements in different working environments. In this embodiment, the brake shoes 350 are made of metal.

[0089] It can be understood that the accommodation groove 311 extends to the brake shoe 350, that is, a part of the accommodation groove 311 is located on the brake shoe 350, and a part of the accommodation groove 311 is located on the fixed part 310. For example, the protruding structure 321 is located on the brake shoe 350 on the movable part 320.

[0090] According to an optional embodiment, with reference to Figure 3 、 Figure 4 A travel switch 220 is provided between the brake arm 200 and the base 100. The travel switch 220 is used to monitor the rotation angle of the brake arm 200 and sends a signal when the brake arm 200 reaches a set position. This can effectively control the working state of the braking system and ensure that the braking system operates within a specific working range. When the brake arm 200 reaches the predetermined position, the travel switch 220 can control other parts of the system (such as the reset mechanism, electromagnet 342, etc.) through electrical signals to achieve precise control and operation. The provision of the travel switch 220 can increase the safety of the system, prevent misoperation or system failure caused by improper position of the brake arm 200, and also contribute to the automation and intelligent control of the system.

[0091] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An electric wheel brake for a crane, applied to a crane comprising a traveling wheel, characterized in that: include: base(100); A brake arm (200) movably disposed on the base (100); A brake assembly (300) is connected to the brake arm (200), and when the brake arm (200) moves relative to the base (100), it can drive the brake assembly (300) to contact the travel wheel to achieve braking; as well as a driving reset mechanism (400) connected to the brake arm (200) and used to drive the brake arm (200) to rotate relative to the base (100) so as to make the brake assembly (300) contact or disengage with the travel wheel; The brake assembly (300) comprises a movable portion (320), a fixed portion (310), and a locking member (340); the movable portion (320) is movably connected to the fixed portion (310); and an elastic member (330) is provided between the movable portion (320) and the fixed portion (310) for ensuring that the movable portion (320) always has a tendency to move toward the walking wheel side. The locking member (340) is used to lock the movable portion (320) and the fixed portion (310); when the movable portion (320) and the fixed portion (310) are locked, the surfaces of the movable portion (320) and the fixed portion (310) facing the running wheel are flush; when the locking member (340) is triggered, the movable portion (320) and the fixed portion (310) are released from locking, so that the movable portion (320) can move toward the running wheel. The movable portion (320) is provided with a heating portion (322), and the heating portion (322) is at least partially located on the side of the fixed portion (310) facing the travel wheel, and the fixed portion (310) is provided with a receiving groove (311); When the fixing portion (310) is in contact with the running wheel, at least a portion of the heating portion (322) is located between the accommodating groove (311) and the running wheel; The heating portion (322) comprises a first elastic portion (322a) and a second elastic portion (322b), wherein the first elastic portion (322a) and the second elastic portion (322b) are located between the fixing portion (310) and the walking wheel; When the fixing portion (310) contacts the running wheel, the first elastic portion (322a) and the second elastic portion (322b) can deform and contact under the pressure of the accommodating groove (311) and the running wheel, the first elastic portion (322a) is provided with a first electrode, and the second elastic portion (322b) is provided with a second electrode; when the first elastic portion (322a) and the second elastic portion (322b) are deformed and contacted, the first electrode and the second electrode are connected to make the heating portion (322) located in the accommodating groove (311) generate heat.

2. The electric wheel brake for a crane according to claim 1, characterized in that: The movable portion (320) is provided with a raised structure (321) at a location where the movable portion (320) is in contact with the running wheel, and the raised structure (321) is provided so that the area in contact with the running wheel is smooth.

3. The electric wheel brake for a crane according to claim 1, characterized in that: The movable portion (320) is provided with a heating structure, and the heating structure can at least increase the temperature of the contact point between the movable portion (320) and the running wheel.

4. The electric wheel brake for a crane according to claim 1, characterized in that: The movable portion (320) is slidably connected to the fixed portion (310), the movable portion (320) is provided with a slot (323), the locking member (340) comprises a latch (341) and an electromagnet (342), and the latch (341) is slidably arranged on the fixed portion (310); When the latch (341) is located in the slot (323), the movable portion (320) and the fixed portion (310) are locked, and a reset button (343) is provided between the latch (341) and the fixed portion (310), and the reset button (343) can move the latch (341) toward the slot (323); The electromagnet (342) is arranged on the fixed part (310). When the electromagnet (342) is energized, the latch (341) can be moved in a direction away from the slot (323), so that the movable part (320) and the fixed part (310) are unlocked.

5. The electric wheel brake for a crane according to claim 4, characterized in that: The latch (341) is provided with a guiding inclined surface (341a), and when the fixing portion (310) moves toward the walking wheel side, the latch (341) can enter the slot (323) under the action of the guiding inclined surface (341a).

6. The electric wheel brake for a crane according to claim 1, characterized in that: The fixing portion (310) is connected to the brake arm (200) via a first hinge shaft (210), the base (100) is connected to a connecting rod (500) via a second hinge shaft (510), the end of the connecting rod (500) facing away from the base (100) is connected to the fixing portion (310) via a third hinge shaft (520), and the base (100) is connected to the brake arm (200) via a fourth hinge shaft (110); The first hinge axis (210), the second hinge axis (510), the third hinge axis (520) and the fourth hinge axis (110) are parallel to each other, and when the brake arm (200) rotates relative to the base (100), the fixing portion (310) faces the walking wheel side.

7. The electric wheel brake for a crane according to claim 6, characterized in that: The connecting rod (500) is made of a plastic metal material, and the connecting rod (500) can be deformed when the force applied exceeds a set value.

8. The electric wheel brake for a crane according to claim 1, characterized in that: The driving reset mechanism (400) comprises a driving motor (410) and an electronic clutch (420), wherein the driving motor (410) is used to drive the brake arm (200) to rotate, and the electronic clutch (420) is used to lock the output shaft of the driving motor (410) so that the driving motor (410) cannot drive the brake arm (200) to rotate; And / or, brake shoes (350) are provided at the locations where the movable portion (320) and the fixed portion (310) are in contact with the running wheel; And / or, a travel switch (220) is provided between the brake arm (200) and the base (100).

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