Electric wheel edge brake for crane

Abstract

The invention provides an electric wheel edge brake for a crane, and relates to the field of brakes. The brake arm is movably arranged on the base; the braking assembly is connected to the braking arm, and when the braking arm moves relative to the base, the braking assembly can be driven to make contact with the walking wheels so as to achieve braking; the driving reset mechanism is connected to the brake arm and used for driving the brake arm to rotate relative to the base so that the brake assembly can make contact with or be separated from the walking wheel. Wherein the brake assembly comprises a movable part, a fixed part and a locking piece, and the movable part is movably connected to the fixed part; the locking piece is used for locking the movable part and the fixed part; and when the locking piece is triggered, the movable part and the fixed part are separated from locking, so that the movable part can move towards the side of the walking wheel. Compared with the prior art, the method has the advantages that the braking efficiency of the crane is improved, and equipment damage or operation risk caused by over-emergency braking is avoided through gradual speed reduction.

Description

Technical Field

[0001] The invention relates to the technical field of brakes, and in particular to an electric wheel brake for a crane. Background Art

[0002] With the rapid development of the domestic economy, gantry cranes are widely used in large loading and unloading sites such as railway freight yards, ports, and docks. These cranes are mainly used to carry long, bulky goods and containers, and undertake important transportation and loading and unloading tasks. However, strong convective weather and sudden strong winds often occur in coastal areas. Such extreme weather conditions will bring severe challenges to the stability of cranes, especially under the action of strong winds, which can easily cause the crane to tip over as a whole, leading to serious safety accidents.

[0003] To address this risk, current gantry cranes generally use electric wheel brakes to prevent the wheels from rolling on the track, thereby improving braking capacity and resisting the impact of strong winds. This braking system enhances the stability of the crane in bad weather by applying additional braking force, ensuring that the crane is less likely to move or overturn in windy conditions.

[0004] However, the existing electric wheel brakes have the problem of complicated operation in practical applications. In an emergency, the operator may not be able to brake or release the brake quickly and accurately, which affects the emergency response speed and operating efficiency of the crane to a certain extent. Summary of the invention

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

[0006] The present application provides an electric wheel brake for a crane, which adopts the following technical solution: An electric wheel brake for a crane is applied to a crane, wherein the crane comprises a traveling wheel, including: Pedestal; A brake arm, movably disposed on the base; a brake assembly connected to the brake arm, wherein when the brake arm moves relative to the base, the brake assembly can be driven to contact the travel wheel to achieve braking; and 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 disengages from the travel wheel; Wherein, 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 for making the movable part always have a tendency to move toward the walking wheel side; The locking piece is used to lock the movable part with the fixed part. When the movable part and the fixed part are locked, the surfaces of the movable part and the fixed part facing the walking wheel side are flush. When the locking piece is triggered, the movable part and the fixed part are unlocked so that the movable part can move toward the walking wheel side.

[0007] Preferably, a protruding structure is provided at a location where the movable portion contacts the traveling wheel, and the protruding structure is provided to smoothly provide a region in contact with the traveling wheel.

[0008] Preferably, the movable part is provided with a heating structure, and the heating structure can at least increase the temperature of the contact point between the movable part and the running wheel.

[0009] Preferably, the movable part is provided with a heating part, the heating part is at least partially located on the side of the fixed part facing the walking wheel, and the fixed part is provided with a receiving groove; When the fixing portion is in contact with the traveling wheel, at least a portion of the heating portion is located between the accommodating groove and the traveling wheel.

[0010] 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 fixing part and the walking wheel; When the fixing part contacts the running wheel, the first elastic part and the second elastic part can be deformed and contacted under the pressure of the accommodating groove and the running wheel, and 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 and contacted, the first electrode and the second electrode are connected to make the heating part located in the accommodating groove generate heat.

[0011] Preferably, the movable part is slidably connected to the fixed part, the movable part is provided with a slot, the locking member comprises a latch and an electromagnet, and the latch is slidably arranged on the fixed part; When the latch is located in the slot, the movable part and the fixed part are locked, and a reset key is provided between the latch and the fixed part, and the reset key can move the latch toward the slot side; The electromagnet is arranged on the fixed part. When the electromagnet is energized, the latch can be moved in a direction away from the slot, so that the movable part and the fixed part are unlocked.

[0012] Preferably, the latch is provided with a guiding slope, and when the fixing portion moves toward the walking wheel side, the latch can enter the slot under the action of the guiding slope.

[0013] Preferably, the fixing part is connected to the brake arm via a first hinge shaft, the base is connected to a connecting rod via a second hinge shaft, the connecting rod is connected to the fixing part via a third hinge shaft at an end away from the base, and the base is connected to the brake arm via a fourth hinge shaft; The first hinge axis, the second hinge axis, the third hinge axis and the fourth hinge axis are parallel to each other, and when the brake arm rotates relative to the base, the fixing portion faces the walking wheel side.

[0014] Preferably, the connecting rod is made of a plastic metal material, and the connecting rod can be deformed when the force applied to the connecting rod exceeds a set value.

[0015] Preferably, the drive reset mechanism comprises a drive motor and an electronic clutch, wherein the drive motor is used to drive the brake arm to rotate, and the electronic clutch is used to lock the output shaft of the drive motor so that the drive motor cannot drive the brake arm to rotate; And / or, the movable part and the fixed part are provided with brake shoes at the contact points with the running wheels; And / or, a travel switch is arranged between the brake arm and the base.

[0016] The present invention has the following advantages and beneficial effects: The present application makes the braking process more efficient and controllable by configuring the brake assembly to include a fixed portion and a movable portion that can move relative to the fixed portion. When braking needs to be initiated, the locking member and the drive reset mechanism are triggered, and the drive reset mechanism begins to gradually drive the brake arm to rotate, thereby causing the fixed portion and the movable portion to move toward the running wheel side. At the same time, under the action of the elastic member, the movable portion is unlocked relative to the fixed portion, and quickly approaches the running wheel and contacts the running wheel. At this time, the elastic member causes the movable portion to be in close contact with the running wheel, thereby achieving a preliminary braking effect.

[0017] Initial braking relies on the close contact between the movable part and the travel wheel to generate friction, which effectively slows down the rotation speed of the travel wheel. Due to the limited contact force between the elastic part and the movable part, the movable part can only gradually slow down the speed of the travel wheel, thereby avoiding mechanical shock or crane swing caused by sudden and severe braking. As the fixed part continues to move, the force of the elastic part on the movable part gradually increases, further enhancing the braking effect and ensuring that the speed of the travel wheel gradually drops to near zero. When the speed of the travel wheel is low or stopped, the fixed part is in full contact with the travel wheel, and complete braking is achieved through the synergy of the fixed part and the movable part, ensuring that the travel wheel no longer moves, thereby achieving a smooth and efficient braking effect.

[0018] This design not only improves the braking efficiency of the crane, but also avoids equipment damage or operational risks caused by excessive braking by gradually decelerating. In addition, since the deceleration effect of the movable part on the running wheel during initial braking is limited, it can ensure that when the fixed part fully contacts the running wheel, the speed of the running wheel is at a low level or zero, thereby reducing the risk of large swings of the crane due to rapid braking and improving safety and stability.

[0019] The heating design provides temperature rise when needed, removes the ice and snow layer, and enhances the friction between the fixed part and the running wheel; when heating is not needed, the elastic deformation energy-saving control system is used to balance the braking control and temperature management, avoid energy waste and ensure precise braking. The connecting rod is made of plastic metal material, which can be deformed when the force exceeds the set value, so that the direction of the contact surface between the fixed part and the movable part and the running wheel can be adjusted during maintenance, which is convenient for repair. This design improves the adaptability of the system and simplifies long-term maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a first structural schematic diagram of an embodiment of the present application, mainly showing the protruding structure.

[0022] Figure 2 It is a second structural diagram of an embodiment of the present application.

[0023] Figure 3 This is a third structural diagram of an embodiment of the present application.

[0024] Figure 4 It is a structural schematic diagram of this brake arm.

[0025] Figure 5 is an exploded view of the brake assembly.

[0026] Figure 6 It is a partial cross-sectional view of the brake assembly.

[0027] Figure 7 yes Figure 6 Schematic diagram of the enlarged structure of part A in the middle.

[0028] The markings in the figure are: 100, base; 110, fourth hinge axis; 200, brake arm; 210, first hinge axis; 220, travel switch; 300, brake assembly; 310, fixing portion; 311, accommodating groove; 320, movable portion; 321, protruding structure; 322, heating portion; 322a, first elastic portion; 322b, second elastic portion; 323, slot; 330, elastic member; 340, locking member; 341, latch; 341a, guiding slope; 342, electromagnet; 343, reset button; 350, brake shoe; 400, drive reset mechanism; 410, drive motor; 420, electronic clutch; 500, connecting rod; 510, second hinge axis; 520, third hinge axis. DETAILED DESCRIPTION

[0029] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0030] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0031] The embodiment of the present application provides an electric wheel brake for a crane, which is suitable for a crane, especially a gantry crane. The gantry crane includes a traveling wheel, and the brake of the present invention is installed on the gantry crane and is used to decelerate and brake the traveling wheel.

[0032] 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.

[0033] 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 driving 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 driving reset mechanism 400 drives the brake arm 200 to rotate, the brake assembly 300 can be moved closer to or away from the running wheel. In this way, the brake assembly 300 can be in contact with or separated from the running wheel, thereby achieving braking or releasing the braking of the running wheel.

[0034] It should be noted that the driving reset mechanism 400 can adopt existing technical solutions such as hydraulic and electric, which are all helpful to achieve the relative rotation of the brake arm 200. In this process, when the brake assembly 300 contacts the running wheel, it can play a role of deceleration and braking. When the brake assembly 300 is separated from the running wheel, the braking effect can be avoided, ensuring the flexibility and safety of the crane operation.

[0035] 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 provided between the movable portion 320 and the fixed portion 310 to enable the movable portion 320 to always have a tendency to move toward the running wheel side. The elastic member 330 is beneficial to improving the response speed and adaptive ability of the brake assembly 300, ensuring that when braking is required, the movable portion 320 can quickly approach the running wheel and contact it.

[0036] The locking member 340 is used to lock the movable part 320 with the fixed part 310. When the movable part 320 and the fixed part 310 are locked, the surfaces of the movable part 320 and the fixed part 310 facing the running wheel 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 running wheel, the surfaces of the movable part 320 and the fixed part 310 facing the running wheel are just flush. At this time, the position between the movable part 320 and the fixed part 310 is the same as the relative position when locked, so as to facilitate relocking. At the same time, after the movable part 320 and the fixed part 310 are locked when they are both in contact with the running wheel, the movable part 320 and the fixed part 310 can be locked and separated together with the running wheel when they are separated from the running wheel, so as to achieve the effect of quickly unlocking the running wheel. This design can achieve the effect of quickly locking when the running wheel needs to be locked, and achieve the effect of quickly unlocking when the running wheel needs to be unlocked.

[0037] It is understandable that, in this embodiment, the surface of the running wheel in contact with the movable portion 320 and the fixed portion 310 is a plane. Therefore, when both the movable portion 320 and the fixed portion 310 are in contact with the running wheel, the surfaces of the movable portion 320 and the fixed portion 310 facing the running wheel are exactly flush. The reason for this design is that by ensuring that the movable portion 320 and the fixed portion 310 have the same contact surface when contacting the running wheel, the relative positions between the two can be ensured to remain consistent, thereby facilitating the re-locking of the locking member 340.

[0038] Specifically, when both the movable part 320 and the fixed part 310 are in contact with the running wheel, since the contact surfaces of the two are flush, their relative positions are the same as the initial locking state, which helps to quickly and accurately restore the lock, thereby achieving an efficient braking function. This design ensures the coordinated work of the movable part 320 and the fixed part 310, improves the stability and reliability of the entire braking process, and especially in the case of needing to quickly restore the lock or release the lock, it can avoid operation delays or inaccuracies caused by inconsistent positions.

[0039] When the movable part 320 contacts the running wheel, the fixed part 310 moves toward the running wheel, which can gradually compress the elastic part 330, thereby storing elastic potential energy. When braking is required next time, the elastic part 330 can quickly drive the movable part 320 to contact the running wheel, thereby improving the braking response speed, enhancing the braking accuracy, and ensuring the stability and safety of the braking process. For example, the elastic part 330 can be a spring.

[0040] When the locking member 340 is triggered, the movable portion 320 is unlocked from the fixed portion 310, so that the movable portion 320 can move toward the running wheel side. At this time, the movable portion 320 will quickly approach the running wheel and contact the running wheel to achieve a preliminary braking effect. In addition, in some special areas, the running wheel may be frozen. By allowing the movable portion 320 to quickly hit the running wheel, the ice layer on the surface of the running wheel can be destroyed, which helps to reduce or remove the ice at the contact point between the fixed portion 310 and the running wheel, and increase the friction between the fixed portion 310 and the running wheel, thereby improving the braking effect on the running wheel and avoiding the situation where braking cannot be performed when there is ice.

[0041] Through this design, the contact between the movable part 320 and the running wheel can achieve braking more quickly and effectively. At the same time, after unlocking, the movable part 320 can adaptively adjust the contact force through the action of the elastic member 330 to avoid excessive braking or abrupt braking effects. This structure helps to improve braking accuracy, reduce the impact on the crane, and ensure the stability and safety of operation.

[0042] According to an alternative embodiment, referring to Figure 1 , Figure 4The movable part 320 is provided with a protruding structure 321 at the contact point with the running wheel, and the protruding structure 321 is used to smoothly set the area in contact with the running wheel. The protruding structure 321 is used to reduce the contact area with the ice layer when contacting the running wheel, thereby increasing the pressure at the contact part 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 ice on the surface of the running wheel, ensuring that the subsequent braking effect is not affected by the ice layer.

[0043] At the same time, the raised structure 321 is used to smoothly set the area in contact with the running wheel, which helps to prevent the raised structure 321 from damaging the running wheel surface when sliding with the running wheel. Through this design, the braking effect when the movable part 320 contacts the running wheel can be improved, and the running wheel surface can be effectively protected to extend its service life. This structure is particularly important in cold environments, and can ensure that the crane's braking system can still operate stably and efficiently even in icy conditions.

[0044] According to an optional embodiment, the movable part 320 is provided with a heating structure (not shown in the figure), and the heating structure can at least increase the temperature of the contact area between the movable part 320 and the running wheel. The heating structure can effectively increase the temperature of the movable part 320, thereby removing or reducing the ice layer in the contact area between the running wheel and the movable part 320. This can ensure that the contact area between the movable part 320 and the running wheel is within a suitable temperature range in a cold environment, thereby improving the braking effect.

[0045] Specifically, the heating structure can prevent the friction in the contact area caused by low temperature from decreasing when the movable part 320 contacts the running wheel in cold areas, thereby affecting the braking effect. The heating structure keeps the temperature of the contact area within a reasonable range, ensuring sufficient friction to achieve a stable braking effect. This design helps to improve the braking performance under low temperature conditions, ensure the reliable operation of the crane in different environments, and avoid the risk of poor braking due to ice or low temperature.

[0046] It can be understood 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.

[0047] According to an alternative embodiment, referring to Figure 3 , Figure 4The movable part 320 is provided with a heating part 322, and the heating part 322 is at least partially located on the side of the fixed part 310 facing the running wheel, and the fixed part 310 is provided with a receiving groove 311. When the fixed part 310 is in contact with the running wheel, at least part of the heating part 322 is located between the receiving groove 311 and the running wheel. The heating part 322 can increase the temperature of the fixed part 310, thereby effectively increasing the contact temperature between the fixed part 310 and the running wheel, thereby enhancing the braking effect between the two.

[0048] Specifically, the function of the heating part 322 is to improve the friction performance of the contact surface between the fixing part 310 and the running wheel by increasing the temperature of the fixing part 310. In a cold environment, the contact area between the fixing part 310 and the running wheel may have insufficient friction due to the low temperature, thereby affecting the braking effect. Through the heating effect of the heating part 322, it is possible to ensure that the temperature of the contact area is within a reasonable range, increase the friction, and thus improve the braking efficiency.

[0049] Through this design, the heating part 322 can not only ensure that the contact surface temperature between the movable part 320 and the running wheel is appropriate, but also can increase the temperature of the fixed part 310 to a certain extent, further optimizing the braking performance between the fixed part 310 and the running wheel. This structure is particularly suitable for applications in low temperature environments, ensuring the stability and reliability of the crane braking system in cold weather.

[0050] According to an alternative embodiment, referring to Figure 5 , Figure 6 , the heating part 322 includes a first elastic part 322a and a second elastic part 322b, and the first elastic part 322a and the second elastic part 322b are located between the fixed part 310 and the running wheel. When the fixed part 310 contacts the running wheel, the first elastic part 322a and the second elastic part 322b can be deformed and contacted under the pressure of the accommodating groove 311 and the running wheel, and 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 and contacted, the first electrode and the second electrode are connected to make the heating part 322 located in the accommodating groove 311 heat up. This design enables the first elastic part 322a and the second elastic part 322b to act as switches of the circuit when 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 running wheel.

[0051] The design of the heating part 322 can significantly improve the working efficiency of the brake in a cold environment, especially when ice or snow accumulates on the surface of the running wheel. The increase in temperature can effectively remove the ice or snow layer, thereby enhancing the friction between the fixing part 310 and the running 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 fixing part 310 and the running wheel within a reasonable range, avoiding the decrease in friction caused by low temperature, thereby ensuring the stability and reliability of the braking effect.

[0052] In some application scenarios, especially in order to avoid the running wheel from moving too fast, it is necessary to accurately control the moving speed of the running wheel. In this case, only the movable part 320 can be in contact with the running wheel, while the fixed part 310 maintains a certain distance from the running wheel. By adjusting the distance between the fixed part 310 and the running wheel, the compression amount of the elastic member 330 can be controlled, thereby changing the friction between the movable part 320 and the running wheel. In this way, when the fixed part 310 is not in contact with the running wheel, appropriate resistance can be provided to the running wheel by controlling the friction, thereby helping to smoothly control the speed of the running wheel.

[0053] When the fixing portion 310 is not in contact with the running wheel, the fixing portion 310 does not need to brake the running wheel, so there is no need to heat the fixing portion 310. In this case, the first elastic portion 322a and the second elastic portion 322b will not be subjected to the squeezing force between the fixing portion 310 and the running wheel, so they will not be deformed. When there is no deformation, there will be no contact between the first electrode and the second electrode, and the current cannot flow, and the heating function will not be triggered. Through this design, energy waste is avoided when heating is not required, thereby effectively saving energy consumption and improving the energy efficiency of the overall system.

[0054] In summary, this heating design can not only provide effective temperature rise when heating is needed, remove the possible ice and snow layer, thereby increasing the friction between the fixing part 310 and the running wheel, but also effectively save energy by controlling the working state of the system through the deformation of the elastic part 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 provide precise braking effect and operation control.

[0055] It is understandable that electric heating tubes are provided in the movable part 320 and the heating part 322. The working principle of the electric heating tube is to achieve heat by passing current through a conductor with a large resistance. Specifically, when the electric heating tube passes current through the conductor, due to the large resistance of the conductor, the electrical energy is converted into thermal energy, thereby causing the temperature of the heating part 322 to rise. Through this heating structure, the temperature of the movable part 320 and the fixed part 310 can be controlled, especially in a cold environment, 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.

[0056] It is understandable that the first elastic part 322a and the second elastic part 322b are made of metal and have good elasticity and durability. Its main function is to adapt to the extrusion force through elastic deformation when squeezed by the fixed part 310 and the running wheel, and quickly return to its original state after the extrusion is released. This design can ensure that the working state is stable during long-term use, and avoid 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, provide appropriate pressure and response, and save energy and extend the service life of the equipment.

[0057] According to an alternative embodiment, referring to Figure 5 , Figure 7 The movable part 320 is slidably connected to the fixed part 310, and the movable part 320 is provided with a slot 323. The locking member 340 includes a latch 341 and an electromagnet 342, and the latch 341 is slidably arranged on the fixed part 310. By the latch 341 entering and exiting the slot 323, the movable part 320 and the fixed part 310 can be locked and unlocked.

[0058] When the latch 341 is located in the slot 323, the movable part 320 and the fixed part 310 are locked, and a reset button 343 is provided between the latch 341 and the fixed part 310, and the reset button 343 can move the latch 341 toward the slot 323. Specifically, the reset button 343 is used to cause the latch 341 to always have a movement tendency toward the slot 323, ensuring that the latch 341 can be aligned with the slot 323 and enter the slot 323, thereby achieving the locking of the movable part 320 and the fixed part 310. Exemplarily, the reset button 343 is a spring.

[0059] Reference Figure 5 , Figure 7The electromagnet 342 is disposed on the fixed part 310. When the electromagnet 342 is energized, the latch 341 can be moved away from the slot 323, so that the movable part 320 and the fixed part 310 are unlocked. When the electromagnet 342 is energized, it can generate a strong magnetic field, thereby driving the latch 341 to move away from the slot 323, so that the movable part 320 and the fixed part 310 are unlocked. The strong magnetism generated by the electromagnet 342 can exert a strong attraction on the latch 341, overcome the elastic force of the reset button 343, and make the latch 341 disengage from the slot 323, thereby achieving the unlocking of the fixed part 310 and the movable part 320.

[0060] The advantage of this design is that the locking and unlocking operations can be completed quickly and reliably by utilizing the electric control function of the electromagnet 342, thereby avoiding the wear and operation complexity that may be caused by the traditional mechanical locking member 340. In addition, the reset button 343 provides an additional guarantee to ensure that the latch 341 can automatically return to its original position and lock when there is no power supply, thereby increasing the reliability of the system.

[0061] It is understandable that when the electromagnet 342 drives the latch 341 to move, a relatively large driving force is required because the movement of the latch 341 needs to overcome the elastic force of the reset button 343 and possible friction. To this end, the electromagnet 342 generates a relatively strong magnetic field by providing an instantaneous high voltage, thereby achieving a relatively large magnetic force, overcoming these resistances, and driving the latch 341 to move in a direction away from the slot 323. This relatively strong magnetic force can effectively overcome 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.

[0062] In addition, in order to ensure that the latch 341 can move smoothly and receive sufficient force, the design can use mechanical principles such as the lever principle to further optimize the driving process of the latch 341. Through the lever principle, the magnetic force of the electromagnet 342 can be amplified by the lever device, so that the latch 341 can obtain sufficient moving force under the smaller driving 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.

[0063] In this way, the electromagnet 342 can provide sufficient power to unlock the fixed portion 310 and the movable portion 320, achieving fast and reliable operation, and improving the response speed and accuracy of the overall braking system.

[0064] According to an alternative embodiment, referring to Figure 5 , Figure 7, the latch 341 is provided with a guiding slope 341a, and when the fixed part 310 moves toward the running wheel side, the latch 341 can enter the slot 323 under the action of the guiding slope 341a. Through the design of the guiding 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 locking failure caused by 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 that contact the running wheel are flush, the latch 341 is aligned with the slot 323, and enters the slot 323 under the action of the reset button 343, thereby achieving reliable locking.

[0065] Specifically, after the fixed portion 310 and the movable portion 320 are unlocked, the fixed portion 310 will gradually approach the running wheel, and the surface of the fixed portion 310 facing the running wheel will gradually approach the surface of the movable portion 320 in contact with the running wheel. When the fixed portion 310 is in contact with the running wheel, the surfaces of the fixed portion 310 and the movable portion 320 in contact with the running wheel will be flush, and at this time, the guiding inclined surface 341a causes the latch 341 to retract and align with the slot 323. When the surfaces of the fixed portion 310 and the movable portion 320 in contact with the running wheel are flush, the latch 341 is exactly aligned with the slot 323, and under the action of the reset button 343, the latch 341 smoothly enters the slot 323, completing the locking of the fixed portion 310 and the movable portion 320.

[0066] This design ensures that when the brake is released, the fixed part 310 and the movable part 320 can smoothly move away from the running wheel and quickly release the brake without unnecessary delay or friction, thereby 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 return to the predetermined working state more quickly when braking next time, thereby enhancing the continuity and stability of the braking.

[0067] According to an alternative embodiment, referring to Figure 1 , Figure 2 The fixing part 310 is connected to the brake arm 200 through the first hinge shaft 210, the base 100 is connected to the connecting rod 500 through the second hinge shaft 510, the end of the connecting rod 500 away from the base 100 is connected to the fixing part 310 through the third hinge shaft 520, and the base 100 and the brake arm 200 are connected through the fourth hinge shaft 110.

[0068] 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. When the brake arm 200 rotates relative to the base 100, the fixed portion 310 faces the running wheel side. Through the first hinge axis 210, the second hinge axis 510, the third hinge axis 520 and the fourth hinge axis 110 that are parallel to each other, the connecting lines of these four hinge axes can form a quadrilateral or parallelogram structure. When the brake arm 200 rotates, the contact surface of the fixed portion 310 and the movable portion 320 always faces the running wheel, so that it can be ensured that during braking, the fixed portion 310 and the movable portion 320 can always contact the running wheel, avoiding the situation where effective braking cannot be performed due to misalignment. Therefore, this structure is beneficial to ensure the accuracy and stability of the braking process.

[0069] According to an optional embodiment, the connecting rod 500 is made of a plastic metal material, and the connecting rod 500 can be deformed when the force exceeds a set value. Before and after the fixed portion 310 and the movable portion 320 contact the running wheel, they are subjected to a certain impact force, which may cause the fixed portion 310 and the movable portion 320 to rotate to a certain extent relative to the brake arm 200. The plasticity of the connecting rod 500 enables it to deform when subjected to force, thereby adapting to a certain rotation, and keeping the surfaces of the fixed portion 310 and the movable portion 320 in contact with the running wheel always facing the running wheel. This design helps to provide higher flexibility during braking, ensuring that the contact surface is always accurately aligned with the running wheel, thereby achieving effective braking.

[0070] At the same time, the plastic metal material of the connecting rod 500 also brings advantages in terms of maintenance. Since it can be deformed when the force exceeds the set value, the direction of the contact surface between the fixed part 310 and the movable part 320 and the running wheel can be adjusted as needed in subsequent maintenance, which facilitates the repair of the contact surface. This adjustable design further enhances the adaptability of the system and the convenience of maintenance in long-term use.

[0071] According to an alternative embodiment, referring to Figure 2 , Figure 3The drive reset mechanism 400 includes a drive motor 410 and an electronic clutch 420. The drive 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 drive motor 410, so that the drive motor 410 cannot drive the brake arm 200 to rotate. When the brake arm 200 needs to be locked, the electronic clutch 420 can lock it by controlling the flow of current or other mechanisms to prevent the drive motor 410 from continuing to drive the brake arm 200 to rotate, ensuring that the system remains stationary when no further rotation is required. Conversely, when it is necessary to unlock and reset, the electronic clutch 420 can be unlocked, so that the drive motor 410 can resume working and continue to drive the brake arm 200 to rotate. Through this design, the reset mechanism can efficiently and accurately control the interaction between the drive motor 410 and the brake arm 200, thereby improving the response speed and stability of the entire braking system.

[0072] According to an optional embodiment, brake shoes 350 are provided at the contact points between the movable part 320 and the fixed part 310 and the running wheel. The provision of the brake shoes 350 can effectively improve the braking efficiency and enhance the friction between the movable part 320, the fixed part 310 and the running wheel. During the braking process, the friction between the brake shoes 350 and the running wheel can quickly reduce the rotation speed of the running wheel, 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 extend 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 under different working environments. In this embodiment, the brake shoes 350 are metal brake shoes 350.

[0073] It is understandable that the receiving groove 311 extends to the brake shoe 350 , that is, a portion of the receiving groove 311 is located on the brake shoe 350 , and a portion of the receiving groove 311 is located on the fixed portion 310 . Exemplarily, the protruding structure 321 is located on the brake shoe 350 on the movable portion 320 .

[0074] According to an alternative embodiment, referring 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 send a signal when the brake arm 200 reaches a set position. This can effectively control the working state of the brake system and ensure that the brake system operates within a specific working range. When the brake arm 200 reaches a predetermined position, the travel switch 220 can control other parts of the system (such as the reset mechanism, the 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.

[0075] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An electric wheel brake for a crane, applied to a crane, wherein the crane includes a traveling wheel, characterized in that: include: Base(100); A brake arm (200) movably disposed on the base (100); A brake assembly (300) connected to the brake arm (200), wherein when the brake arm (200) moves relative to the base (100), the brake assembly (300) can be driven to contact the travel wheel to achieve braking; as well as A driving reset mechanism (400) connected to the brake arm (200) and used for driving 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); 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 part (320) with the fixed part (310); when the movable part (320) and the fixed part (310) are locked, the surfaces of the movable part (320) and the fixed part (310) facing the running wheel side are flush; when the locking member (340) is triggered, the movable part (320) and the fixed part (310) are unlocked, so that the movable part (320) can move toward the running wheel side.

2. The electric wheel brake for a crane according to claim 1, characterized in that: The movable portion (320) is provided with a protruding structure (321) at a location where it is used to contact the running wheel, and the protruding structure (321) is provided to smoothly provide a region where it is used to contact the running wheel.

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

4. An electric wheel brake for a crane according to claim 1 or 3, characterized in that: The movable portion (320) is provided with a heating portion (322), 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 containing groove (311) and the running wheel.

5. The electric wheel brake for a crane according to claim 4, characterized in that: 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) is in contact with 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, and 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 in deform and contact, the first electrode and the second electrode are connected to cause the heating portion (322) located in the accommodating groove (311) to generate heat.

6. The electric wheel brake for a crane according to claim 1, characterized in that: The movable part (320) is slidably connected to the fixed part (310), the movable part (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 part (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), and 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.

7. The electric wheel brake for a crane according to claim 6, 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).

8. 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); an 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.

9. The electric wheel brake for a crane according to claim 8, characterized in that: The connecting rod (500) is made of a plastic metal material, and when the force applied to the connecting rod (500) exceeds a set value, the connecting rod (500) can be deformed.

10. 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, the movable portion (320) and the fixed portion (310) are provided with brake shoes (350) at the locations where they are in contact with the running wheels; And / or, a travel switch (220) is provided between the brake arm (200) and the base (100).

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