Non-contact chain tensioning mechanism and power device

Abstract

The utility model relates to a kind of non-contact chain tensioning mechanism and power device, it is related to mechanical transmission technical field, it includes base body, chain transmission assembly and two magnetic force adjusting assemblies. Chain transmission assembly includes power motor, driving wheel, driven wheel and chain body, power motor is fixed on base body, driving wheel is connected with power motor, driven wheel is rotatably connected with base body, chain body is engaged with driving wheel and driven wheel simultaneously, chain body includes first overhang section and second overhang section between driving wheel and driven wheel. Two magnetic force adjusting assemblies are installed on base body and correspond with first overhang section and second overhang section respectively, and magnetic force adjusting assembly is used to adjust the tension of chain body. It can adjust the tension of chain without directly contacting with chain, without the case that the service life of component is short due to abrasion, cannot provide lasting and stable tensioning effect, long service life, low use cost.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission technology, and more specifically, to a non-contact chain tensioning mechanism and power device. Background Technology In equipment power transmission applications, sprocket drives are a common application. However, the design of chain drives often requires the use of a tensioning mechanism. Existing designs are basically contact-type mechanical mechanisms, which often exacerbate chain wear and shorten the service life of the chain and sprockets.

[0002] The inventors discovered during their research that existing chain tensioning mechanisms have at least the following drawbacks: The tensioning effect is achieved by using a tensioning wheel in conjunction with an elastic mechanism. The tensioning wheel and the chain are always in contact. This contact design often exacerbates the wear of equipment parts, shortens the service life of the chain and sprocket, and cannot ensure a long-lasting and stable tensioning effect after long-term operation. Utility Model Content

[0003] The purpose of this utility model includes, for example, providing a non-contact chain tensioning mechanism and power device, which can adjust the chain tension without directly contacting the chain, avoiding the situation where the service life of the parts is short due to wear and tear, and the inability to provide a long-lasting and stable tensioning effect. It has a long service life and low operating cost.

[0004] The embodiments of this utility model can be implemented as follows: In a first aspect, this utility model provides a non-contact chain tensioning mechanism, comprising: The system comprises a base, a chain drive assembly, and two magnetic adjustment assemblies. The chain drive assembly includes a power motor, a drive wheel, a driven wheel, and a chain body. The power motor is fixed to the base, the drive wheel is connected to the power motor, the driven wheel is rotatably connected to the base, and the chain body meshes with both the drive wheel and the driven wheel. The chain body includes a first suspended section and a second suspended section located between the drive wheel and the driven wheel. Both magnetic force adjustment components are mounted on the base and correspond to the first suspended section and the second suspended section respectively. The magnetic force adjustment components are used to adjust the tension acting on the first suspended section and the second suspended section by changing the magnitude of the magnetic force, thereby adjusting the tension of the chain body.

[0005] In an optional embodiment, the magnetic force adjustment assembly includes an iron core and a coil, the iron core being mounted on the base and the coil being wound around the iron core for connection to a power source.

[0006] In an optional embodiment, the magnetic force adjustment assembly further includes a fixing frame and a mounting frame, the fixing frame being fixed to the base, the mounting frame being detachably connected to the fixing frame, and the iron core being fixed to the mounting frame.

[0007] In an optional embodiment, the fixing frame includes two fixing plates and two limiting plates. The two fixing plates are fixed to the base and arranged at relative intervals. The two limiting plates are respectively connected to the two fixing plates and are located between the two fixing plates. The mounting bracket is snapped between the two fixing plates and the two limiting plates, and the two limiting plates are used to prevent the mounting bracket from detaching from the side of the fixing plates away from the base.

[0008] In an optional embodiment, the magnetic adjustment assembly further includes a movable frame slidably connected to the base in the extending direction of the first suspended section or the second suspended section; the fixed frame is mounted on the movable frame.

[0009] In an optional embodiment, the magnetic adjustment assembly further includes a linear actuator mounted on the base and connected to the movable frame for driving the movable frame to slide relative to the base in the extension direction.

[0010] In an optional embodiment, the linear actuator includes a drive motor, a lead screw, a slider, and a guide rod. The drive motor is mounted on the base, the lead screw is connected to the drive motor, the slider is screwed onto the lead screw, and the slider is connected to the movable frame. The guide rod is fixed on the base, and the extension direction of the guide rod is consistent with the extension direction of the lead screw. The movable frame is slidably connected to the guide rod.

[0011] In an optional embodiment, the magnetic force adjustment assembly further includes a pressure sensor mounted on the mounting bracket and in contact with the mounting bracket to acquire the pressure applied by the mounting bracket to the mounting bracket.

[0012] In an optional embodiment, the non-contact chain tensioning mechanism further includes a controller that is communicatively connected to both the pressure sensor and the two magnetic adjustment components.

[0013] Secondly, this utility model provides a power device, the power device comprising: The non-contact chain tensioning mechanism described in any of the foregoing embodiments.

[0014] The beneficial effects of this utility model embodiment include, for example: In summary, the non-contact chain tensioning mechanism provided in this embodiment utilizes a magnetic adjustment component on each side of the chain body. These two components correspond to the first and second suspended sections of the chain body. When energized, the magnetic adjustment components generate magnetic force, which attracts the chain body. By adjusting the current, the magnetic force is adjusted, thus regulating the tension exerted on the chain body. A stronger magnetic force results in greater tension and a tighter chain; conversely, a weaker magnetic force results in less tension and a looser chain. Since the magnetic adjustment components change the chain tension by adjusting the magnetic force, and the adjustment is non-contact, there is no wear or contact, resulting in a long service life. The tension can be adjusted in real-time by regulating the power supply, offering flexible and convenient control and a wide range of applications. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the non-contact chain tensioning mechanism in this embodiment; Figure 2 for Figure 1 A magnified schematic diagram of a portion of the image; Figure 3 This is a schematic diagram of the linear expansion joint in this embodiment.

[0017] icon: 100-Base; 200-Chain drive assembly; 210-Power motor; 220-Driving wheel; 230-Driven wheel; 240-Chain body; 241-First suspended section; 242-Second suspended section; 300-Magnetic adjustment assembly; 310-Iron core; 320-Coil; 330-Fixing frame; 331-Fixing plate; 332-Limiting plate; 333-Clamping space; 340-Mounting frame; 350-Moving frame; 360-Linear driver; 361-Drive motor; 362-Lead screw; 363-Slider; 364-Guide rod; 370-Pressure sensor; 400-Controller. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0023] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0024] Please refer to Figure 1This embodiment provides a non-contact chain tensioning mechanism, which includes a base 100, a chain drive assembly 200, and two magnetic adjustment assemblies 300. The chain drive assembly 200 includes a power motor 210, a drive wheel 220, a driven wheel 230, and a chain body 240. The power motor 210 is fixed on the base 100, the drive wheel 220 is connected to the power motor 210, and the driven wheel 230 is rotatably connected to the base 100. The chain body 240 simultaneously meshes with both the drive wheel 220 and the driven wheel 230. The chain body 240 includes a first suspended section 241 and a second suspended section 242 located between the drive wheel 220 and the driven wheel 230. Both magnetic force adjustment components 300 are mounted on the base 100 and correspond to the first suspended section 241 and the second suspended section 242 respectively. The magnetic force adjustment components 300 are used to adjust the tension acting on the first suspended section 241 and the second suspended section 242 by changing the magnitude of the magnetic force, thereby adjusting the tension of the chain body 240.

[0025] As described above, the working principle of the non-contact chain tensioning mechanism provided in this embodiment is as follows: By setting a magnetic adjustment component 300 on each side of the chain body 240, the two magnetic adjustment components 300 correspond to the first suspended section 241 and the second suspended section 242 of the chain body 240. When the magnetic adjustment component 300 is energized, it generates a magnetic force, which attracts the chain body 240. By adjusting the current, the magnitude of the magnetic force can be adjusted, thereby adjusting the tension of the chain body 240 exerted by the magnetic adjustment component 300. The greater the magnetic force, the greater the tension, and the tighter the chain body 240; conversely, the smaller the magnetic force, the smaller the tension, and the looser the chain body 240. Since the magnetic adjustment components 300 can change the tension of the chain body 240 by adjusting the magnitude of the magnetic force, and the two are adjusted in a non-contact manner, there is no mutual contact wear, resulting in a long service life. By adjusting the power in real time, the tension can be adjusted, making the control flexible and convenient, and the application range wide.

[0026] Meanwhile, since magnetic adjustment components 300 are respectively set on both sides of the chain body 240, the two magnetic adjustment components 300 work together to adjust the tension of the chain body 240, avoiding the situation where only one side of the tension will cause one-sided wear on the drive wheel 220 and the driven wheel 230. The chain body 240 is subjected to more balanced force, with less wear and a longer service life.

[0027] The following embodiments illustrate the details of the non-contact chain tensioning mechanism of this application by way of example.

[0028] Please refer to Figures 1-3In this embodiment, the optional non-contact chain tensioning mechanism includes a base 100, a chain drive assembly 200, a magnetic adjustment assembly 300, and a controller 400. The chain drive assembly 200 is mounted on the base 100. Two magnetic adjustment assemblies 300 are also mounted on the base 100, located on opposite sides of the chain drive assembly 200. These two magnetic adjustment assemblies work together to adjust the tension of the chain drive assembly 200. The controller 400 is communicatively connected to both magnetic adjustment assemblies 300 and can independently adjust the working state of each assembly, i.e., adjust the magnetic force, thereby adjusting the tension of the chain drive assembly 200.

[0029] Please refer to Figure 1 Optionally, the chain drive assembly 200 includes a power motor 210, a drive pulley 220, a driven pulley 230, and a chain body 240. The power motor 210 is fixed to the base 100, and the output shaft of the power motor 210 is horizontally arranged. The drive pulley 220 is fixedly connected to the output shaft of the power motor 210 via a key or spline, etc., and the driven pulley 230 is rotatably connected to the base 100. The drive pulley 220 and the driven pulley 230 are arranged at intervals in the horizontal direction. The chain body 240 meshes with both the drive pulley 220 and the driven pulley 230. The chain body 240 includes a first suspended section 241 and a second suspended section 242 located between the drive pulley 220 and the driven pulley 230, with the first suspended section 241 located above the second suspended section 242. The power motor 210 is electrically connected to the power source. After the power motor 210 is started, it can drive the drive wheel 220 to rotate, thereby driving the chain body 240 to rotate. The driven wheel 230 can passively rotate under the drive of the chain body 240.

[0030] It should be understood that in other embodiments, the driving wheel 220 and the driven wheel 230 may also be arranged vertically at intervals. Alternatively, in some embodiments, the output shaft of the power motor 210 may also extend vertically.

[0031] In addition, the motor 210 can be connected to AC power or a power battery via a power cord.

[0032] It is worth noting that the chain body 240 is made of metal and can approach the iron core 310 when the iron core 310 is magnetic.

[0033] Please refer to Figure 1 In this embodiment, optionally, the two magnetic force adjustment components 300 can be configured to have identical structures, which facilitates manufacturing and reduces costs. To avoid repetition and redundancy, this embodiment describes the detailed structure of one magnetic force adjustment component 300.

[0034] Please refer to Figure 1 and Figure 2 For example, the magnetic force adjustment assembly 300 includes an iron core 310, a coil 320, a fixed frame 330, a mounting frame 340, a movable frame 350, a linear actuator 360, and a pressure sensor 370. The iron core 310 is mounted on the mounting frame 340, and the coil 320 is wound around the iron core 310. Both ends of the coil 320 can be electrically connected to the positive and negative terminals of a power source, such as AC power or a battery. The fixed frame 330 is mounted on the movable frame 350, and the mounting frame 340 is mounted on the fixed frame 330. The movable frame 350 is slidably connected to the base 100 along the length of either the first suspended section 241 or the second suspended section 242. The linear actuator 360 is mounted on the base 100, and its telescopic end is connected to the movable frame 350, enabling the linear actuator 360 to slide relative to the base 100. The pressure sensor 370 can detect the pressure exerted by the mounting frame 340 on the fixed frame 330. Meanwhile, the controller 400 can adjust the current flowing through the coil 320. The controller 400 is also connected to the linear actuator 360 and the pressure sensor 370 via wireless network or data cable, etc. The controller 400 can adjust the motion state of the linear actuator 360 and also acquire the pressure data acquired by the pressure sensor 370.

[0035] Optionally, the fixing frame 330 includes two fixing plates 331 and two limiting plates 332. Both fixing plates 331 can be L-shaped and can be fixed to the movable frame 350 by bolts or the like. The two fixing plates 331 are arranged at intervals relative to each other in the extending direction of the second suspended section 242. The two limiting plates 332 are respectively fixedly connected to the two fixing plates 331 and are located between the two fixing plates 331. In other words, the two fixing plates 331 have inner side surfaces that are close to each other, and the limiting plates 332 are fixed to these inner side surfaces. The two limiting plates 332 are arranged at intervals relative to each other. Thus, the two fixing plates 331 and the two limiting plates 332 cooperate to define the clamping space 333. The mounting bracket 340 can be inserted into the clamping space 333. The width of the mounting bracket 340 is greater than the distance between the two limiting plates 332. When the mounting bracket 340 moves away from the moving frame 350, it will be blocked by the limiting plates 332. The mounting bracket 340 will not leave the clamping space 333 in the direction away from the moving frame 350, thus ensuring a stable position and providing stable tension to the chain body 240. Furthermore, the mounting bracket 340 can be inserted into or removed from the clamping space 333 by plugging and unplugging, making it easy to install and remove.

[0036] It should be noted that the fixing plate 331 and the limiting plate 332 can be set as an integrated structure, which has high structural strength and long service life.

[0037] Optionally, the pressure sensor 370 can be installed between the mounting bracket 340 and the limiting plate 332. There can be multiple pressure sensors 370. By calculating the average value of multiple pressure sensors 370, the pressure between the mounting bracket 340 and the fixing bracket 330 can be obtained, which can reduce the error of the detection result.

[0038] Please refer to Figure 3 Optionally, the linear actuator 360 includes a drive motor 361, a lead screw 362, a slider 363, and a guide rod 364. The drive motor 361 is mounted on the base 100, the lead screw 362 is connected to the drive motor 361, the slider 363 is screwed onto the lead screw 362, and the slider 363 is connected to the movable frame 350. Both ends of the guide rod 364 are fixed to the base 100, the extension direction of the guide rod 364 is consistent with the extension direction of the lead screw 362, and the movable frame 350 is slidably connected to the guide rod 364. After the drive motor 361 is powered on and started, it can drive the lead screw 362 to rotate. Since the slider 363 is fixedly connected to the moving frame 350 and the guide rod 364 is connected to the moving frame 350, the moving frame 350 will not rotate with the lead screw 362. At the same time, the slider 363 will not rotate with the lead screw 362, so that the slider 363 can drive the moving frame 350 to slide back and forth in the axial direction of the lead screw 362, thereby adjusting the position of the moving frame 350, thereby adjusting the position of the iron core 310, and finally adjusting the position of the iron core 310 attracting the chain body 240, which is flexible in use.

[0039] It should be understood that the end of the lead screw 362 away from the drive motor 361 can be connected to the base 100 through a bearing. Both ends of the lead screw 362 are supported, resulting in high stability.

[0040] In addition, there can be two guide rods 364, which are distributed on both sides of the lead screw 362 and arranged symmetrically.

[0041] The working principle of the non-contact chain tensioning mechanism provided in this embodiment is as follows: For ease of description, the two magnetic adjustment components 300 are a lower adjustment component and an upper adjustment component, respectively. The lower adjustment component is installed below the second suspended section 242, and the upper adjustment component is installed above the first suspended section 241. When the lower and upper adjustment components are energized, the iron core 310 generates magnetic force. The lower adjustment component can pull the second suspended section 242 downward, and the upper adjustment component can pull the first suspended section 241 upward. Due to the interaction of forces, the iron core 310 will also experience a reverse pulling force, which can be detected by the corresponding pressure sensor 370. The force value detected by the pressure sensor 370 can be transmitted to the controller 400. The controller 400 can independently adjust the current of the two magnetic adjustment components 300 based on their respective force values, thereby adjusting the magnetic force of the iron core 310 and ultimately adjusting the tension of the chain body 240.

[0042] It should be understood that the current magnitudes of the upper and lower adjustment components are independently controlled. Furthermore, when the upper adjustment component applies tension, it needs to overcome the gravity of the first suspended section 241, while the gravity of the second suspended section 242 is in the same direction as the tension applied by the lower adjustment component. Therefore, in actual operation, the current flowing through the lower adjustment component is less than the current flowing through the upper adjustment component. Clearly, the specific control of the two magnetic adjustment components 300 can be reasonably adjusted according to the tension of the chain body 240, which will not be described in detail in this embodiment.

[0043] Meanwhile, due to the design of the sliding frame, the position of the iron core 310 between the driving wheel 220 and the driven wheel 230 can be adjusted, thereby adjusting the position of the iron core 310 relative to the first suspended section 241 or the second suspended section 242, changing the position where the chain body 240 is attracted, and making the tension control of the chain body 240 more flexible.

[0044] It should be understood that in some embodiments, the sliding frame can be omitted, the fixing frame 330 is directly fixedly connected to the base 100, and the position of the iron core 310 relative to the chain body 240 is relatively fixed, without adjustment, and a stable tensioning effect can also be provided by magnetic force.

[0045] The non-contact chain tensioning mechanism provided in this embodiment does not directly contact the chain body 240 when adjusting the tension of the chain body 240, making it less prone to wear, with a long service life, and providing a stable tensioning effect.

[0046] This embodiment also provides a power device, including the non-contact chain tensioning mechanism of the above embodiment, which has the advantages of long service life and the ability to provide stable and lasting tensioning effect.

[0047] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A non-contact chain tensioning mechanism, characterized in that, include: The system comprises a base (100), a chain drive assembly (200), and two magnetic adjustment assemblies (300). The chain drive assembly (200) includes a power motor (210), a drive wheel (220), a driven wheel (230), and a chain body (240). The power motor (210) is fixed on the base (100). The drive wheel (220) is connected to the power motor (210). The driven wheel (230) is rotatably connected to the base (100). The chain body (240) meshes with both the drive wheel (220) and the driven wheel (230). The chain body (240) includes a first suspended section (241) and a second suspended section (242) located between the drive wheel (220) and the driven wheel (230). Both magnetic force adjustment components (300) are mounted on the base (100) and correspond to the first suspended section (241) and the second suspended section (242) respectively. The magnetic force adjustment components (300) are used to adjust the tension of the chain body (240) by changing the magnitude of the magnetic force acting on the first suspended section (241) and the second suspended section (242).

2. The non-contact chain tensioning mechanism according to claim 1, characterized in that: The magnetic force adjustment assembly (300) includes an iron core (310) and a coil (320). The iron core (310) is mounted on the base (100), and the coil (320) is wound around the iron core (310). The coil (320) is used to connect to a power source.

3. The non-contact chain tensioning mechanism according to claim 2, characterized in that: The magnetic force adjustment assembly (300) further includes a fixing frame (330) and a mounting frame (340). The fixing frame (330) is fixed on the base (100), and the mounting frame (340) is detachably connected to the fixing frame (330). The iron core (310) is fixed on the mounting frame (340).

4. The non-contact chain tensioning mechanism according to claim 3, characterized in that: The fixing frame (330) includes two fixing plates (331) and two limiting plates (332). The two fixing plates (331) are fixed on the base (100) and arranged at intervals. The two limiting plates (332) are respectively connected to the two fixing plates (331) and are located between the two fixing plates (331). The mounting frame (340) is snapped between the two fixing plates (331) and the two limiting plates (332). The two limiting plates (332) are used to prevent the mounting frame (340) from detaching from the side of the fixing plate (331) away from the base (100).

5. The non-contact chain tensioning mechanism according to claim 3, characterized in that: The magnetic adjustment assembly (300) further includes a movable frame (350) which is slidably connected to the base (100) in the extension direction of the first suspended section (241) or the second suspended section (242); the fixed frame (330) is mounted on the movable frame (350).

6. The non-contact chain tensioning mechanism according to claim 5, characterized in that: The magnetic adjustment assembly (300) further includes a linear actuator (360) mounted on the base (100) and connected to the movable frame (350) for driving the movable frame (350) to slide relative to the base (100) in the extension direction.

7. The non-contact chain tensioning mechanism according to claim 6, characterized in that: The linear actuator (360) includes a drive motor (361), a lead screw (362), a slider (363), and a guide rod (364). The drive motor (361) is mounted on the base (100). The lead screw (362) is connected to the drive motor (361). The slider (363) is screwed onto the lead screw (362) and is connected to the movable frame (350). The guide rod (364) is fixed on the base (100). The extension direction of the guide rod (364) is consistent with the extension direction of the lead screw (362). The movable frame (350) is slidably connected to the guide rod (364).

8. The non-contact chain tensioning mechanism according to any one of claims 3-7, characterized in that: The magnetic force adjustment assembly (300) also includes a pressure sensor (370) mounted on the fixture (330) and in contact with the mounting bracket (340) to obtain the pressure applied by the mounting bracket (340) to the fixture (330).

9. The non-contact chain tensioning mechanism according to claim 8, characterized in that: The non-contact chain tensioning mechanism also includes a controller (400), which is communicatively connected to both the pressure sensor (370) and the two magnetic adjustment components (300).

10. A power unit, characterized in that, The power unit includes: The non-contact chain tensioning mechanism according to any one of claims 1-9.

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