Electromagnetic trundle device and system

Abstract

The utility model provides an electromagnetic trundle device and system.The electromagnetic trundle device comprises a support supporting part, a trundle body and a fixing shaft, the lower end of the support supporting part is a support containing part with an n-shaped outline, and the two ends of the fixing shaft are fixedly connected with the left side and the right side of the support containing part respectively; an electromagnetic coil part and a wheel body are arranged in the middle area of the fixed shaft, the electromagnetic coil part and the wheel body are arranged at an interval, a magnetic conductive material is arranged on the surface of one side, opposite to the electromagnetic coil part, of the wheel body, and locking and unlocking of rotation of the wheel body are achieved by controlling power-on or power-off of the electromagnetic coil part. The device can be applied to a trolley or equipment provided with a plurality of trundles and assembled into a system, efficient and accurate control can be achieved, and the reliability of brake control is improved.

Description

Technical Field

[0001] This application relates to an electromagnetic caster device and system, particularly suitable for trolleys or equipment equipped with multiple casters. Background Technology

[0002] Existing technologies offer various caster systems, including those with and without brakes. Casters with brakes typically employ mechanical structures, such as controlling a mechanical switch to prevent the wheel from rotating. For most scenarios, this type of mechanically braked caster is sufficient. However, for trolleys or equipment with multiple casters, the disadvantages of mechanically braked casters become more apparent. The need for individual control of each caster makes operation inconvenient and prevents rapid and accurate unified control. Even with a unified mechanical switch, the overall system of mechanically braked casters usually requires a large size or volume, resulting in a complex and cumbersome structure. This disadvantage is particularly pronounced in medical trolleys. Considering that medical trolleys are typically used in operating room environments, their size should be minimized to provide more space for surgical equipment or surgeons. Furthermore, the braking function of trolleys in surgical environments demands higher standards, requiring faster and more precise braking control. Utility Model Content

[0003] This application is a solution proposed to address the aforementioned technical problems. This application proposes an electromagnetic caster device, including a support bracket, a wheel body, and a fixed shaft. The lower end of the support bracket is a bracket receiving portion with a "U"-shaped profile. The two ends of the fixed shaft are respectively fixedly connected to the left and right sides of the bracket receiving portion. The device is characterized in that an electromagnetic coil portion is provided in the middle region of the fixed shaft, and a wheel body is spaced apart from the electromagnetic coil portion. The surface of the wheel body opposite to the electromagnetic coil portion is provided with a magnetically conductive material. By controlling the energization or de-energization of the electromagnetic coil portion, the rotation of the wheel body can be locked and unlocked.

[0004] Preferably, the wheel body includes a left wheel body and a right wheel body, the magnetic conductive material is respectively disposed on the right side surface of the left wheel body and the left side surface of the right wheel body, and the electromagnetic coil is disposed between the left wheel body and the right wheel body.

[0005] Preferably, a spacer is provided between the electromagnetic coil and the wheel body, the spacer being used to provide a physical spatial distance between the wheel body and the electromagnetic coil.

[0006] Preferably, the electromagnetic coil section is fixedly installed to the fixed shaft by means of a flat key.

[0007] As preferred, a bottom plate is further included, and a support shaft assembly is further arranged between the support plate and the support plate, so that the support plate and the wheel body are rotatable relative to the bottom plate as a whole.

[0008] As preferred, the support shaft assembly comprises a second fixed shaft, a rotating disc part and a locking part, the second fixed shaft is arranged to extend downward from the bottom surface of the bottom plate, the rotating disc part is sleeved on the second fixed shaft and fixedly connected with the support plate, and the second fixed shaft passes through the top shell of the support plate and is locked by the locking part.

[0009] As preferred, the bottom surface of the bottom plate is provided with a magnetic conductive material, and the rotating disc part is provided with an electromagnetic coil.

[0010] As preferred, the rotating disc part and the second fixed shaft are connected through a thrust bearing, and the locking part is a locking nut.

[0011] The application further provides an electromagnetic caster system, comprising a trolley and a plurality of electromagnetic caster devices as described above installed at the bottom of the trolley, and the electromagnetic coil part of each electromagnetic caster device is connected to a switch device.

[0012] As preferred, the rotation start-stop control of the wheel body relative to the support plate and the rotation start-stop control of the wheel body and the support plate relative to the trolley are independent of each other.

[0013] The above-mentioned scheme provided by the application can at least solve the following technical problems: the electromagnetic coil can generate a magnetic field when energized, thereby realizing the locking of the wheel body, and the locking can be released when the electromagnetic coil is de-energized, the response speed is fast, and the controllability of the rotation of the wheel body is improved by controlling the magnetic field strength. The electromagnetic caster device has no mechanical wear, has a long service life, is highly reliable, and can adapt to various harsh environments.

[0014] In further improvements, the wheel body and the support plate are connected through a bearing, and the wheel body can rotate around the support plate; the support plate can freely rotate around the central axis of the magnetic conductive bottom plate, thereby realizing the rotation freedom of the wheel body in different directions. By adopting the above design, another dimension movement direction (i.e. the overall rotation movement of the wheel body) of the caster is provided, which ensures that the wheel body can be precisely and simultaneously controlled in any state of free rotation, thereby meeting more scene requirements.

[0015] In a further improved embodiment, the electromagnetic coils of the plurality of electromagnetic caster devices are connected to the same switch device, forming an electromagnetic caster system, and the user controls the energization or de-energization of the coils by operating the switch device, thereby achieving the synchronous locking and unlocking of the plurality of casters. With the above design, the locking and unlocking of the wheel bodies can be achieved by the electromagnetic coils and the magnetic conductors without the need for complex mechanical structures, thus the structure is simple, compact, easy to install and use. The electromagnetic coils of the plurality of electromagnetic caster devices can be connected to the same switch device, thereby achieving the synchronous locking and unlocking of the plurality of casters, ensuring that the trolley can achieve emergency stop and be stable enough to ensure the high performance and stability of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0017] Figure 1 A front view structural schematic diagram of an electromagnetic caster device according to an embodiment of the application.

[0018] Figure 2 A front view structural schematic diagram of an electromagnetic caster device according to an embodiment of the application.

[0019] Figure 3 A front view structural schematic diagram of an electromagnetic caster device according to an embodiment of the application.

[0020] Figure 4 A front view structural schematic diagram of an electromagnetic caster device according to an embodiment of the application.

[0021] Figure 5 A front view structural schematic diagram of an electromagnetic caster device according to an embodiment of the application.

[0022] BRIEF DESCRIPTION OF DRAWINGS: 1 - base plate; 2 - bracket, 20 - bracket support part, 20a - bracket joint part, 20b - bracket containing part; 21 - first joint part; 3 - wheel body, 3a - left wheel body, 3b - right wheel body, 31 - bearing, 32 - spacing part, 33 - magnetic conductor; 4 - fixed shaft, 41 - second joint part; 5 - electromagnetic coil part; 91 - magnetic conductive base plate; 93 - wheel body; 920 - bracket support part, 921 - locking device, 923 - bearing part, 924 - fixed shaft, 922 - top housing, 925 - rotating disc part. DETAILED DESCRIPTION

[0023] For the purposes of the present application, the technical solutions and advantages will be clearer, below will be combined with the specific embodiments of the present application and the corresponding drawings to clearly and completely describe the technical solutions of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor belong to the scope of protection of the present application.

[0024] As shown in Figures 1-3 An electromagnetic caster device according to an embodiment provided by the present application includes a bottom plate 1, a bracket 2, a wheel body 3, and a fixed shaft 4. The bottom plate 1 is used to fix it at the bottom of the equipment or trolley or similar components, it should be understood that the bottom plate 1 can also be part of the shell of the equipment or trolley, or can be fixed at the bottom of the shell of the equipment or trolley as a separate component. The bracket 2 is installed on the bottom plate 1, and can be movably connected or fixedly connected with the bottom plate 1. When the bracket 2 is fixedly connected with the bottom plate 1, the two can be integrally formed. When the bracket 2 is movably connected with the bottom plate 1, a support shaft assembly can be arranged to connect between the bottom plate 1 and the bracket 2, and the bracket 2 can be relatively rotatable with the bottom plate 1 through the arrangement of the support shaft assembly, so as to drive the wheel body to be rotatable relative to the bottom plate 1, thereby increasing the freedom degree of rotation in one direction.

[0025] As shown in Figure 2 The bracket 2 includes a bracket support part 20, and a bracket engaging part 20a fixedly connected with the bottom plate 1 is arranged at the upper end of the bracket support part 20. The lower end of the bracket support part 20 is a bracket containing part 20b, and the bracket containing part 20b has a “L” shaped profile to provide a mounting space for the wheel body 3.

[0026] The fixed shaft 4 is a longitudinally extending long shaft, and the two ends of the long shaft are fixedly connected with the left and right sides of the containing part 20 of the “L” shaped profile of the bracket 2 through a first engaging part 21. Figure 3 The left and right directions of the section shown in the middle are the left and right sides. The first engaging part 21 is used to provide fixed connection between the bracket 2 and the fixed shaft 4, and the fixing mode can be bolt, welding or key connection, as long as it can prevent the fixed shaft 4 from being offset when subjected to external force, so as to ensure that there is no displacement or looseness between the fixed shaft 4 and the bracket 2 during operation of the caster device.

[0027] The wheel body 3 includes a left wheel body 3a and a right wheel body 3b, and the left wheel body 3a and the right wheel body 3b are the same shape. Figure 3The cross sections of the left wheel body 3a and the right wheel body 3b in the direction perpendicular to the paper surface shown in FIG. 1 are circular, and are arranged close to the left and right side end surfaces of the support 2, preferably symmetrically. The wheel body 3 is connected to the fixed shaft 4 through the bearings 31 arranged on the left and right sides, so that the wheel body 3 is carried by the fixed shaft 4 and can rotate around the fixed shaft 4, ensuring smooth rotation of the wheel body 3.

[0028] To realize the electromagnetic brake control function, a magnetically permeable body 33 is arranged on the opposite side surface of the left wheel body 3a and the right wheel body 3b (as shown in FIG. 1, the right side surface of the left wheel body 3a and the left side surface of the right wheel body 3b). Figure 3 The magnetically permeable body 33 can be fixed between the wheel body 3 and the fixed shaft 4 by means of adhesion, bolts, welding or keying, and the magnetically permeable body 33 is preferably a sheet material. In the case where the process can be realized, the magnetically permeable body 33 can be integrally formed with the wheel body, i.e. the opposite side surfaces of the left wheel body 3a and the right wheel body 3b are made of magnetically permeable material, which is also in line with the concept of the present application.

[0029] An electromagnetic coil part 5 is arranged in the middle region of the fixed shaft 4, i.e. between the left wheel body 3a and the right wheel body 3b. The electromagnetic coil part 5 is fixedly connected to the fixed shaft 4 through a second joint part 41, which can be preferably a flat key. The simple insertion of the flat key can realize the fixed installation of the two parts, which is simple to assemble and can effectively transmit torque while preventing axial movement, thereby ensuring the stability of the position of the electromagnetic coil part 5.

[0030] A spacing part 32 is further arranged between the electromagnetic coil part 5 and the magnetically permeable body 33. The spacing part 32 is used to provide a physical space between the magnetically permeable body 33 and the electromagnetic coil part 5. The spacing part 32 can be, for example, a spacing pad. Figure 3 The thickness of the spacing part 32 in the cross-sectional direction shown in FIG. 1 is, for example, between 0.5 mm and 1 mm, thereby providing a gap between the electromagnetic coil part 5 and the magnetically permeable body 33 with a size comparable to the thickness of the spacing part 32. In the case of power failure, the wheel body 3 can rotate freely without friction by arranging the spacing part 32.

[0031] The electromagnetic coil part 5 can be connected to a power supply wire (not shown). The arrangement of the wire is based on the principle of not interfering with the rotation of the wheel body. In some embodiments, the fixed shaft 4 and the support 2 can be provided with a hollow channel to provide space for the wire. The wire is connected to a switch device, and the user can control the power-on or power-off of the electromagnetic coil part by operating the switch device.

[0032] When the electromagnetic coil part is energized, the magnetic field generated by the current passing through the electromagnetic coil part 5 interacts with the magnetic conductor 33, generating magnetic lines of force. The magnetic lines of force tightly attract the magnetic conductor 33 and the electromagnetic coil part 5 together. Since the magnetic conductor 33 is fixed on the surface of the opposite sides of the left wheel body 3a and the right wheel body 3b, the left wheel body 3a and the right wheel body 3b cannot freely rotate under the action of the magnetic lines of force. This design makes the wheel body 3 easily locked in the energized state.

[0033] When the current of the electromagnetic coil part 5 is disconnected, the magnetic field disappears immediately, and the magnetic force between the magnetic conductor 33 and the electromagnetic coil part 5 also disappears. At this time, the wheel body 3 is no longer bound by the magnetic force and can freely rotate.

[0034] In the transformed embodiment, the wheel body 3 can not be divided into the left wheel body 3a and the right wheel body 3b, and only one wheel body can be provided. In the transformed embodiment, the wheel body 3 and the electromagnetic coil part 5 are spaced apart, and a magnetic conductive material is provided on the side of the wheel body 3 close to the electromagnetic coil 5. In the case of energizing the electromagnetic coil part 5, the magnetic field attraction force between the electromagnetic coil part 5 and the magnetic conductive material of the wheel body 3 makes it easy to control the start and stop of the rotational movement of the wheel body 3 relative to the support. Compared with the scheme of providing the left wheel body and the right wheel body, this transformed embodiment can provide a more compact structure.

[0035] According to the embodiments provided in the present application, by reasonably arranging the positions of the electromagnetic coil part 5, the wheel body, and the magnetic conductor, the electromagnetic force control caster brake function is realized with a simple structure, the structure is compact, the assembly is easy, and the brake control is convenient.

[0036] On the basis of the foregoing embodiments, the present application also provides another electromagnetic control brake structure for the dimensional movement of the caster, as shown in Figure 4 Compared with embodiment 1, the part of the wheel body 3 in the support accommodating part 20b for realizing the movement and brake function can be selected as the same structure as that of embodiment 1, which will not be described here, and only the differences will be described. Different from embodiment 1, the support supporting part 20 is increased with a structure for realizing another dimensional movement and electromagnetic brake function of the caster, which will be described in detail below.

[0037] As shown in Figure 4 The bottom plate 91 is provided with a support shaft assembly at the bottom, which provides joint installation and rotational support between the bottom of the bottom plate 91 and the support supporting part 920, so that the support supporting part 920 and the wheel body 93 accommodated therein can rotate as a whole relative to the bottom plate 91.

[0038] The support shaft assembly comprises a fixed shaft 924, a bearing part 923, a rotating disc part 925, and a locking part 921. The fixed shaft 924 extends downward from the bottom surface of the bottom plate 91. The bearing part 923 is sleeved on the fixed shaft 924. The rotating disc part 925 is sleeved on the bearing part 923 and is fixedly connected with the support support part 920. The fixed shaft 924 passes through the top shell 922 of the support support part 920 and is locked by the locking part 921, such as a nut or the like.

[0039] The rotating disc part 925 sleeved on the outer periphery of the bearing part 923 can freely rotate around the fixed shaft 924, thereby driving the wheel body 93 connected below to rotate relative to the bottom plate 91 and the fixed shaft 924, and realizing the rotation of the wheel body 93 in another direction.

[0040] In this embodiment, the bottom plate 91 arranged at the bottom of the device or trolley is a magnetically conductive bottom plate. The magnetically conductive material can be selected as the same material as that of the magnet 33. The magnetically conductive bottom plate 91 can be made of a magnetically conductive material as a whole, or only the bottom region thereof can be made of a magnetically conductive material. The rotating disc part 925 is also arranged as an electromagnetic coil part. The rotating disc part 925 can be arranged as an electromagnetic coil element as a whole, or the rotating disc part 925 includes a shell and an electromagnetic coil element arranged inside the shell. Regardless of which case, since the electromagnetic coil element is arranged, the rotating disc part 925 is also an electromagnetic coil part in this embodiment. When energized, the magnetic field generated by the electromagnetic coil part interacts with the magnetically conductive bottom plate 91, generates magnetic lines of force, and causes the magnetically conductive bottom plate 91 and the rotating disc part 92 to be tightly attracted together, thereby locking the rotation movement of the support part around the shaft and further locking the overall rotation of the wheel body. When the current is disconnected, the magnetic field disappears, and the magnetic force also disappears. The rotation of the rotating disc part 92 is restored to be free, and the wheel body 93 can rotate immediately, thereby realizing the unlocking of the overall rotation of the wheel body.

[0041] Preferably, the bearing part 923 is a thrust bearing, which can withstand forces from different directions, thereby ensuring the stability and durability of the entire structure. The magnetically conductive bottom plate is tightly connected with the support support part by the locking nut. The design of the locking nut makes the entire connected part more firm and less likely to loosen, thereby ensuring the stability and reliability of the device during operation.

[0042] In this embodiment, not only the rotating movement of the wheel body 93 relative to the support support part 920 can be electromagnetically controlled to start and stop in the manner shown in the embodiment, but also the rotating movement of the wheel body 93 and the support support part 920 as a whole relative to the trolley can be electromagnetically controlled to start and stop, so that the similar universal wheel structure can be electromagnetically controlled to realize comprehensive start and stop control. Preferably, the rotating start and stop control of the wheel body 93 relative to the support support part 920 is independent of the rotating start and stop control of the wheel body 93 and the support support part 920 as a whole relative to the trolley.

[0043] AsFigure 5 As shown, the application also provides an electromagnetic caster system, which includes four electromagnetic caster devices, the four electromagnetic caster devices are installed on the bottom of a surgical trolley, the wires connected to the electromagnetic coil parts of the four electromagnetic caster devices are connected to the same switch device, in this way, the user only needs to operate one switch to realize the simultaneous energization / disenengization of the electromagnetic coil parts of the four electromagnetic caster devices, so as to realize the synchronization of the on / off of the four electromagnetic caster devices, and ensure that the trolley using the electromagnetic caster system can realize fast and stable synchronous emergency braking. It should be understood that although four electromagnetic caster devices, one trolley and one switch device are shown here, in fact, it is not limited to this, and can be multiple electromagnetic caster devices, multiple trolleys or multiple switch devices, to realize different scene applications and caster device motion start / stop control requirements.

[0044] According to the embodiments of the application, efficient and accurate brake control of the caster device of the trolley and the trolley including multiple caster devices can be realized with a simple structure and low cost, which is especially suitable for use in small operating environment and high control precision requirement scenarios.

[0045] It should be noted that the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusion, so that processes, methods, articles or devices including a series of elements not only include those elements, but also include other elements not explicitly listed, or further include elements inherent in such processes, methods, articles or devices. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article or device including the element.

[0046] The above only describes the embodiments of the application and is not intended to limit the application. Those skilled in the art can make various modifications and changes to the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the scope of the claims of the application.

Claims

1. An electromagnetic caster device, comprising a support bracket, a wheel body, and a fixed shaft, wherein the lower end of the support bracket is a bracket receiving portion with a "U"-shaped profile, and the two ends of the fixed shaft are respectively fixedly connected to the left and right sides of the bracket receiving portion, characterized in that, The fixed shaft has an electromagnetic coil in the middle area and a wheel spaced apart from the electromagnetic coil. The surface of the wheel opposite to the electromagnetic coil is provided with a magnetic material. The wheel can be locked and unlocked by controlling the energization or de-energization of the electromagnetic coil.

2. The electromagnetic caster device according to claim 1, characterized in that, The wheel body includes a left wheel body and a right wheel body. The magnetic conductive material is respectively disposed on the right side surface of the left wheel body and the left side surface of the right wheel body. The electromagnetic coil part is disposed between the left wheel body and the right wheel body.

3. The electromagnetic caster device according to claim 1, characterized in that, A spacer is provided between the electromagnetic coil and the wheel body, the spacer being used to provide a physical spatial distance between the wheel body and the electromagnetic coil.

4. The electromagnetic caster device according to claim 1, characterized in that, The electromagnetic coil is fixedly installed to the fixed shaft by means of a flat key.

5. The electromagnetic caster device according to claim 1, characterized in that, It also includes a base plate, and a support shaft assembly is provided between the base plate and the bracket support part, so that the bracket support part and the wheel body can rotate relative to the base plate.

6. The electromagnetic caster device according to claim 5, characterized in that, The support shaft assembly includes: a second fixed shaft, a turntable portion, and a locking portion. The second fixed shaft extends downward from the bottom surface of the base plate. The turntable portion is sleeved on the second fixed shaft and fixedly connected to the bracket support portion. The second fixed shaft passes through the top outer shell of the bracket support portion and is locked and fixed by the locking portion.

7. The electromagnetic caster device according to claim 6, characterized in that, The bottom surface of the base plate is provided with a magnetic material, and the turntable is provided with an electromagnetic coil.

8. The electromagnetic caster device according to claim 6, characterized in that, The turntable and the second fixed shaft are connected by a thrust bearing, and the locking part is a locking nut.

9. An electromagnetic caster system, characterized in that, The device includes a trolley and a plurality of electromagnetic caster devices as described in any one of claims 1-8, all of which are mounted on the bottom of the trolley and have their electromagnetic coils connected to a switching device.

10. The electromagnetic caster system according to claim 9, characterized in that, The start-stop control of the rotation of the electromagnetic caster wheel relative to the support bracket is independent of the start-stop control of the rotation of the wheel and the support bracket as a whole relative to the trolley.

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