A stop device for a transmission mechanism of an isolated drum of a washing machine

Abstract

The utility model discloses an isolated washing machine inner tube transmission mechanism stop brake device relates to washing machine technical field, including with the transmission mechanism of inner roller transmission connection, transmission mechanism side end is equipped with the limit seat board, the limit seat board is fixed on washing machine main body lateral wall, be provided with stop brake device on the limit seat board, stop brake device includes drive mechanism and multilink swing mechanism, drive mechanism passes through multilink swing mechanism and converts linear drive force into swing action, drives stop brake pole body subassembly and enters drive end of transmission mechanism from side end, to directly lock the power output of transmission mechanism, thereby cut off the torque transmission of inner roller, adopt multilink swing mechanism and convert the linear drive force of cylinder into curve swing movement, through the compound movement of arc swing arm and cylindrical cam and absorbs impact load, reduce the instantaneous stress peak value of cylinder piston rod, prolong the life of cylinder sealing element, avoid air leakage failure.

Description

Technical Field

[0001] This utility model relates to the field of washing machine technology, specifically to a brake stop device for the inner drum transmission mechanism of an isolated washing machine. Background Technology

[0002] A hygienic, isolated washing machine adds a door to the other side of the outer drum of a regular washing machine, forming a double-door structure with one door for loading and another for unloading. This design prevents direct contact between laundry items during loading and unloading, effectively preventing cross-contamination. It is typically used in places requiring high hygiene standards, such as hospitals, pharmaceutical factories, and chemical plants. Currently, existing washing equipment generally uses friction braking, such as disc brakes, expansion brakes, or band brakes, to control the rotation of the impeller and the drum inside the washing machine.

[0003] The prior art CN214613146U discloses an isolated washing machine, including a motor, a belt connected to the power output end of the motor, a pulley connected to the belt, an inner drum connected to the pulley, and a vertical disc brake connected to the pulley. The inner drum is driven to rotate by the pulley and stopped by the disc brake. However, the use of friction braking methods such as disc brakes has the drawbacks of rapid brake pad wear and braking accuracy being greatly affected by the coefficient of friction.

[0004] To address the aforementioned issues, existing technology CN217234186U proposes a frictionless braking system for a dual-door washer-extractor, which achieves braking through a cylinder-driven rigid engagement between the chuck and the chuck slot. While this solves the friction loss problem, the following technical bottlenecks still exist:

[0005] High cylinder load impact: In existing technology, the cylinder directly pulls the caliper to perform linear motion. Under frequent start-stop conditions, the cylinder piston rod needs to withstand instantaneous impact loads, which can easily lead to fatigue damage of the seals, causing air leakage and seriously affecting the life of the braking system.

[0006] High positioning accuracy is required: The fit between the chuck and the slot requires extremely high coaxiality and positional accuracy. After long-term use, mechanical deformation or vibration can easily lead to fit deviation, causing braking delay or jamming, which affects the safety of the equipment.

[0007] Insufficient structural redundancy: The linear cylinder drive mode lacks a torque buffering mechanism, and the braking components lack multi-stage limit design. Under abnormal loads, structural deformation or displacement may occur, leading to braking failure. Utility Model Content

[0008] To address the aforementioned issues, this invention provides a braking device for the inner drum transmission mechanism of a hygienic washing machine that can directly act on the drive end, has a torque buffering function, and is highly reliable, thereby improving the braking performance and durability of the hygienic washing machine.

[0009] To address the aforementioned problems, this utility model provides a brake-stopping device for the inner drum transmission mechanism of an isolated washing machine. The device includes a transmission mechanism connected to the inner drum transmission. A limiting seat plate is provided on the side end of the transmission mechanism and is fixed to the side wall of the washing machine body. A brake-stopping device is provided on the limiting seat plate. This device includes a drive mechanism and a multi-link swing mechanism. The drive mechanism converts linear driving force into swing motion through the multi-link swing mechanism, driving the brake-stopping rod assembly to extend from the side end into the drive end of the transmission mechanism to directly lock the power output of the transmission mechanism, thereby cutting off the torque transmission of the inner drum. The brake-stopping device directly acts on the driven wheel of the transmission mechanism, synchronously locking the drive end of the transmission chain at the moment the motor stops. This avoids the belt slippage problem caused by the continuous torque output of the driven wheel in existing technologies, significantly extending the service life of the transmission belt.

[0010] Preferably, the transmission mechanism includes a motor, the transmission shaft of which is connected to the driving wheel via a coupling, the driving wheel is connected to the driven wheel via a belt, a rotating shaft is movably sleeved on the inner end of the driven wheel, the end of the rotating shaft away from the driven wheel passes through a bearing seat and an opening on the side wall of the washing machine body and is connected to the inner drum, the bearing seat is fixedly mounted on a flange, the flange is fixedly mounted on the side wall of the washing machine body, and the brake rod assembly acts on the driven wheel to achieve braking.

[0011] Preferably, one end of the drive mechanism is movably hinged to the multi-link swing mechanism, and the end of the multi-link swing mechanism away from the drive mechanism is movably hinged to the brake stop rod assembly. The drive mechanism drives the multi-link swing mechanism to swing, causing the brake stop rod assembly to extend and retract, thereby pressing against the driven wheel. The extension and retraction braking of the brake stop rod assembly is achieved through the compound motion of the multi-link swing mechanism. The transmission method of the multi-link swing mechanism driven by a cylinder is used to convert linear thrust into arc swing motion. The lever principle of the linkage mechanism is used to amplify the braking torque. At the same time, the curve characteristics of the swing path buffer the rigid impact at the moment of braking contact, reducing the wear of the mechanism.

[0012] Preferably, the driving mechanism is a pneumatic drive assembly, including a drive telescopic cylinder and a piston rod connected to it in transmission. The front end of the drive telescopic cylinder is provided with a cylinder plate, and the piston rod is sleeved on the cylinder plate. The cylinder plate is fixedly connected to a limiting seat plate. The front end of the piston rod passes through the limiting hole of a U-shaped limiting clamp and is fixedly connected by bolts. The U-shaped limiting clamp is clamped on the multi-link swing mechanism and is movably hinged to it. The structure of the U-shaped limiting clamp and the bolt fixation disperses the axial stress of the piston rod, avoiding the stress concentration problem at the cylinder joint in the traditional chuck structure. The rigid connection between the cylinder plate and the limiting seat plate enhances the vibration resistance of the cylinder body and prevents the installation position from loosening due to high-frequency start and stop.

[0013] Preferably, the multi-link swing mechanism includes an arc-shaped swing arm link. One end of the arc-shaped swing arm link is movably hinged to a U-shaped limiting clamp. The arc-shaped connection of the middle section of the arc-shaped swing arm link is sleeved on a cylindrical cam. The end of the arc-shaped swing arm link away from the U-shaped limiting clamp is movably hinged to a rotating swing arm. The other end of the rotating swing arm is movably hinged to a brake stop rod assembly. The cooperation between the arc-shaped swing arm link and the cylindrical cam forms a dual-axis swing trajectory. During braking, the braking torque is smoothly applied through the gradual contact pressure of the cam surface, reducing impact damage to the driven wheel and suppressing the mechanism's rebound vibration.

[0014] Preferably, the brake stop rod assembly includes a concave hinge rod, which is movably hinged to the rotating swing arm. The other end of the concave hinge rod away from the rotating swing arm is fixedly connected to a brake stop rod. The front end of the brake stop rod has a helical engagement structure. The helical engagement structure adopts a helical protrusion structure, which generates a radial force when it contacts the driven wheel, forcing the brake stop rod to tightly engage with the rim of the driven wheel. Compared with the traditional flat chuck, the frictional resistance is greatly improved, effectively preventing brake slippage.

[0015] Preferably, a limiting block is fixedly provided on the upper side of the limiting seat plate. The limiting block is located at the lower end of the brake rod assembly to prevent the limiting block from playing a limiting role, thereby limiting the excessive displacement of the brake rod and ensuring consistent braking stroke.

[0016] Compared with the prior art, the present invention achieves the following beneficial technical effects:

[0017] This invention employs a multi-link swing mechanism to convert the linear driving force of the cylinder into a curved swing motion. The combined motion of the arc-shaped swing arm and the cylindrical cam absorbs the impact load, reduces the instantaneous stress peak of the cylinder piston rod, extends the life of the cylinder seals, and avoids air leakage.

[0018] The spiral engagement structure at the front end of the brake rod of this utility model forms a spiral engagement with the rim of the driven wheel, which automatically compensates for positional deviation at the moment of contact, reduces the dependence on assembly precision, and enhances the anti-slip capability of the brake contact surface.

[0019] The limiting block on the limiting seat plate of this utility model forms a double mechanical limit with the cylindrical cam, which prevents the brake rod from shifting under abnormal vibration, and ensures the repeatability and long-term stability of the braking action. Attached Figure Description

[0020] Fig. 1 This is a schematic diagram of the anti-braking device of the inner drum transmission mechanism of the isolated washing machine of this utility model.

[0021] Fig. 2 This is a structural schematic diagram of the brake stop device of the inner drum transmission mechanism of the isolated washing machine of this utility model from another perspective.

[0022] Fig. 3 This is a structural diagram of the cylinder drive mechanism, the multi-link swing mechanism, and the brake lever assembly.

[0023] In the diagram: 1-Transmission mechanism, 101-Motor, 102-Driving wheel, 103-Belt, 104-Driven wheel, 105-Shaft, 106-Bearing seat, 107-Flange, 2-Limiting seat plate, 201-Limiting block, 3-Brake stop device, 31-Drive mechanism, 310-Drive telescopic cylinder, 311-Piston rod, 312-Cylinder plate, 313-U-shaped limiting clamp, 314-Bolt, 32-Multi-link swing mechanism, 320-Arc-shaped swing arm connecting rod, 321-Cylindrical cam, 322-Rotating swing arm, 33-Brake stop rod assembly, 331-Concave hinge seat rod, 332-Brake stop rod body, 333-Helical interlocking structure. Detailed Implementation

[0024] The following description, in conjunction with the accompanying drawings, further illustrates a specific embodiment of this utility model. It should be noted that the structure, dimensions, and installation methods of the components in the following embodiments are merely illustrative, and the specific forms adopted can be appropriately adjusted according to actual needs, but still fall within the protection scope of this utility model.

[0025] See Figs. 1-3 As shown, this embodiment provides a brake stop device for the inner drum transmission mechanism of an isolated washing machine, including a transmission mechanism 1 connected to the inner drum transmission. The transmission mechanism 1 has a limiting seat plate 2 on its side end, which is fixed to the side wall of the washing machine body. A brake stop device 3 is provided on the limiting seat plate 2. The brake stop device 3 includes a drive mechanism 31 and a multi-link swing mechanism 32. The drive mechanism 31 converts the linear driving force into a swinging motion through the multi-link swing mechanism 32, driving the brake stop rod assembly 33 to extend from the side end into the drive end of the transmission mechanism 1 to directly lock the power output of the transmission mechanism, thereby cutting off the torque transmission of the inner drum. The brake stop device acts directly on the driven wheel of the transmission mechanism, synchronously locking the drive end of the transmission chain at the moment the motor stops, avoiding the belt slippage problem caused by the continuous output torque of the driven wheel in the prior art, and significantly extending the service life of the transmission belt.

[0026] The transmission mechanism 1 includes a motor 101. The transmission shaft of the motor 101 is connected to the driving wheel 102 via a coupling. The driving wheel 102 drives the driven wheel 104 via a belt 103. The driven wheel 104 is connected to the inner drum via a rotating shaft 105. The rotating shaft 105 passes through a bearing seat 106 and an opening in the side wall of the washing machine. The bearing seat 106 is fixed to a flange 107, which is bolted to the side wall of the washing machine body. The brake lever assembly 33 acts on the driven wheel 104 to achieve braking.

[0027] One end of the drive mechanism 31 is movably hinged to the multi-link swing mechanism 32, and the end of the multi-link swing mechanism 32 away from the drive mechanism 31 is movably hinged to the brake stop rod assembly 33. The drive mechanism 31 drives the multi-link swing mechanism 32 to swing, thereby causing the brake stop rod assembly 33 to extend and retract, thus pressing against the driven wheel 104. The extension and retraction braking of the brake stop rod assembly 33 is achieved through the compound motion of the multi-link swing mechanism 32. The transmission method of the multi-link swing mechanism driven by the cylinder is adopted to convert the linear thrust into the arc swing action. The lever principle of the linkage mechanism is used to amplify the braking torque. At the same time, the curve characteristics of the swing path buffer the rigid impact at the moment of braking contact and reduce the wear of the mechanism.

[0028] The drive mechanism 31 is a pneumatic drive assembly, including a drive telescopic cylinder 310 and a piston rod 311 connected to it in transmission. The front end of the drive telescopic cylinder 310 is provided with a cylinder plate 312, and the piston rod 311 is sleeved on the cylinder plate 312. The cylinder plate 312 is fixedly connected to the limiting seat plate 2. The front end of the piston rod 311 passes through the limiting hole of the U-shaped limiting clamp 313 and is fixedly connected by bolts 314. The U-shaped limiting clamp 313 is clamped on the multi-link swing mechanism 32 and is movably hinged to it. The structure of the U-shaped limiting clamp and the bolt fixation disperses the axial stress of the piston rod and avoids the stress concentration problem at the cylinder joint in the traditional chuck structure. The rigid connection between the cylinder plate and the limiting seat plate enhances the vibration resistance of the cylinder body and prevents the installation position from loosening due to high-frequency start and stop.

[0029] The multi-link swing mechanism 32 includes an arc-shaped swing arm link 320. One end of the arc-shaped swing arm link 320 is movably hinged to a U-shaped limiting clamp 313. The arc-shaped connection of the middle section of the arc-shaped swing arm link 320 is sleeved on a cylindrical cam 321. The end of the arc-shaped swing arm link 320 away from the U-shaped limiting clamp 313 is movably hinged to a rotating swing arm 322. The other end of the rotating swing arm 322 is movably hinged to a brake stop rod assembly 33. The cooperation between the arc-shaped swing arm link and the cylindrical cam forms a dual-axis swing trajectory. During braking, the braking torque is smoothly loaded through the gradual contact pressure of the cam surface, reducing impact damage to the driven wheel and suppressing the rebound vibration of the mechanism.

[0030] A limiting block 201 is fixedly provided on the upper side of the limiting seat plate 2. The limiting block 201 is located at the lower end of the brake rod assembly 33 to prevent the limiting block from playing a limiting role, restrict the excessive displacement of the brake rod, and ensure the consistency of the braking stroke.

[0031] The brake stop rod assembly 33 includes a concave hinge seat rod 331, which is movably hinged to the rotating swing arm 322. The other end of the concave hinge seat rod 331 away from the rotating swing arm 322 is fixedly connected to the brake stop rod 332. The front end of the brake stop rod 332 is provided with a helical engagement structure 333. The helical engagement structure adopts a helical protrusion structure, which generates a radial component force when contacting the driven wheel, forcing the brake stop rod to tightly engage with the rim of the driven wheel. Compared with the traditional flat chuck, the frictional resistance is greatly improved, effectively preventing brake slippage.

[0032] To facilitate understanding of the above technical solutions of this utility model, the following detailed description of the above technical solutions of this utility model is provided through specific usage methods.

[0033] The specific work process is as follows:

[0034] When the inner roller needs to be stopped or isolated, the piston rod 311 at the front end of the drive telescopic cylinder 310 of the drive mechanism 31 of the drive brake device 3 extends forward; the piston rod 311 drives the arc-shaped swing arm connecting rod 320 of the multi-link swing mechanism 32 to swing around the curved surface of the cylindrical cam 321 through the U-shaped limit clamp 313. The swing of the arc-shaped swing arm connecting rod 320 is transmitted to the brake rod assembly 33 through the rotating swing arm 322, driving the brake rod 332 to extend into the driven wheel 104. The spiral engagement structure 333 at the front end of the brake rod 332 contacts the rim of the driven wheel 104. The radial component force generated by the spiral protrusion forces the rod to tightly engage with the rim, cutting off the torque transmission. During braking, the composite multi-link mechanism smoothly applies the impact force to achieve torque buffering; after braking, the piston rod 311 of the drive telescopic cylinder 310 retracts, driving the multi-link swing mechanism 32 to move in the opposite direction, the brake stop rod 332 disengages from the driven wheel 104, and the device returns to its initial state.

[0035] Through the above structure, this utility model effectively solves the technical bottlenecks such as large impact from direct cylinder thrust, rapid wear of friction elements, high dependence on braking accuracy, and insufficient structural redundancy, and greatly improves the reliability and durability of the braking device.

[0036] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and 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. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0037] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the present invention.

Claims

1. A brake device for the inner drum transmission mechanism of an isolated washing machine, comprising a transmission mechanism (1) connected to the inner drum transmission, characterized in that, The transmission mechanism (1) has a limiting seat plate (2) on its side end. The limiting seat plate (2) is fixed on the side wall of the washing machine body. The limiting seat plate (2) is provided with a brake stop device (3). The brake stop device (3) includes a drive mechanism (31) and a multi-link swing mechanism (32). The drive mechanism (31) converts the linear driving force into a swinging motion through the multi-link swing mechanism (32). The brake stop rod assembly (33) is driven to extend from the side end into the drive end of the transmission mechanism (1) to directly lock the power output of the transmission mechanism, thereby cutting off the torque transmission of the inner drum. One end of the drive mechanism (31) is movably hinged to the multi-link swing mechanism (32), and the end of the multi-link swing mechanism (32) away from the drive mechanism (31) is movably hinged to the brake rod assembly (33). The drive mechanism (31) drives the multi-link swing mechanism (32) to swing, thereby causing the brake rod assembly (33) to extend and retract, thus blocking the driven wheel (104). The extension and retraction braking of the brake rod assembly (33) is achieved through the compound motion of the multi-link swing mechanism (32). The drive mechanism (31) is a pneumatic drive assembly, including a drive telescopic cylinder (310) and a piston rod (311) connected to it in transmission. The front end of the drive telescopic cylinder (310) is provided with a cylinder plate (312). The piston rod (311) is sleeved on the cylinder plate (312). The cylinder plate (312) is fixedly connected to the limiting seat plate (2). The front end of the piston rod (311) passes through the limiting hole of the U-shaped limiting clamp (313) and is fixedly connected by bolts (314). The U-shaped limiting clamp (313) is clamped on the multi-link swing mechanism (32) and is movably hinged to it. The multi-link swing mechanism (32) includes an arc-shaped swing arm link (320). One end of the arc-shaped swing arm link (320) is movably hinged to a U-shaped limiting clamp (313). The arc-shaped connection of the middle section of the arc-shaped swing arm link (320) is sleeved on a cylindrical cam (321). The end of the arc-shaped swing arm link (320) away from the U-shaped limiting clamp (313) is movably hinged to a rotating swing arm (322). The other end of the rotating swing arm (322) is movably hinged to a brake rod assembly (33).

2. The brake device for the transmission mechanism of the inner drum of the isolated washing machine according to claim 1, characterized in that, The transmission mechanism (1) includes a motor (101), the transmission shaft of the motor (101) is connected to the drive wheel (102) via a coupling, the drive wheel (102) is connected to the driven wheel (104) via a belt (103), the driven wheel (104) is movably sleeved with a rotating shaft (105) at the inner end, the end of the rotating shaft (105) away from the driven wheel (104) passes through the bearing seat (106) and the opening on the side wall of the washing machine body and is connected to the inner drum. The bearing seat (106) is fixedly mounted on the flange (107), the flange (107) is fixed on the side wall of the washing machine body, and the brake rod assembly (33) acts on the driven wheel (104) to achieve braking.

3. The brake device for the transmission mechanism of the inner drum of the isolated washing machine according to claim 1, characterized in that, The brake stop rod assembly (33) includes a concave hinge seat rod (331), which is movably hinged to the rotating swing arm (322). The other end of the concave hinge seat rod (331) away from the rotating swing arm (322) is fixedly connected to a brake stop rod (332). The front end of the brake stop rod (332) is provided with a helical engagement structure (333) for forming an anti-slip lock with the driven wheel (104).

4. The brake device for the transmission mechanism of the inner drum of the isolated washing machine according to claim 2 or 3, characterized in that, The upper side of the limiting seat plate (2) is fixedly provided with a limiting block (201), and the limiting block (201) is located at the lower end of the brake rod assembly (33).

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