Clutch device and washing machine

Abstract

This utility model provides a clutch device and a washing machine, belonging to the field of electrical technology. It includes a drive unit with a ratchet connected to it; a brake arm capable of rotating around an axis, with a pushing part on the brake arm; a pawl with a connecting part fixedly mounted thereon, the connecting part being mounted on the brake arm and rotatably connected to it, and the pushing part abutting against the connecting part; and an elastic reset part connected to the connecting part. The advantage is that this device achieves clutch switching through mechanical linkage, eliminating the need for additional fasteners, effectively reducing the number of parts, and improving the overall compactness and space utilization of the structure.

Description

Technical Field

[0001] This utility model belongs to the field of electrical technology and relates to a clutch device and a washing machine. Background Technology

[0002] In the transmission systems of existing household appliances such as washing machines, the clutch mechanism is a key component for switching between washing and spin-drying functions, and its structural design directly affects the equipment's working efficiency, operational stability, and service life. Traditional clutch mechanisms typically include components such as a housing, ratchet, pawl, brake arm, and return spring, controlling the engagement and disengagement of power transmission through the engagement or disengagement of the pawl and ratchet. However, existing clutch mechanisms still have many shortcomings in their structural design.

[0003] For example, in some traditional clutch mechanisms, the pawl is fixed to the housing by an independent pin, requiring multiple fasteners such as nuts and snap rings for installation. This not only results in a large number of parts and complex assembly, but also occupies a large space and affects the overall compactness of the structure. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a clutch device with a compact structure and high space utilization.

[0005] The objective of this utility model can be achieved through the following technical solution: a clutch device, comprising:

[0006] A drive unit, on which a ratchet is drivenly connected;

[0007] A brake arm capable of rotating about an axis, wherein a pushing part is provided on the brake arm;

[0008] A pawl is fixedly provided with a connecting part, which is disposed on the brake arm and rotatably connected to the brake arm. The pushing part is in contact with the connecting part.

[0009] An elastic reset part is connected to the connecting part;

[0010] In the first working state, the pawl is engaged with the ratchet;

[0011] In the second working state, the brake arm rotates and the connecting part is driven to rotate by the pushing part, the pawl is disengaged from the ratchet, and the elastic reset part is compressed and stored.

[0012] In one of the aforementioned clutch devices, the pushing part includes a pushing screw, which is screwed and fixed to the brake arm.

[0013] In the aforementioned clutch device, the connecting part is provided with an abutting part. In the first working state, the abutting part abuts against the housing of the driving part; in the second working state, the abutting part separates from the housing.

[0014] In the aforementioned clutch device, the elastic reset part includes a reset torsion spring, the connecting part and the brake arm are rotatably connected by a rotating shaft, the reset torsion spring is sleeved on the rotating shaft, one of the pins of the reset torsion spring abuts against the connecting part, and the other pin of the reset torsion spring is connected to the housing of the drive part.

[0015] In one of the aforementioned clutch devices, a connecting hook is integrally provided on the connecting part, and one of the pins of the reset torsion spring is engaged in the connecting hook.

[0016] In one of the aforementioned clutch devices, the connecting part includes an arc-shaped connecting bar, the inner arc surface of which points towards the center of the ratchet, and the pawl is integrally disposed at the end of the connecting bar.

[0017] In one of the above-mentioned clutch devices, along the rotation direction of the pawl, the brake arm is disposed on the side of the housing of the driver, and the connecting bar is located on the side of the pawl, and a bent bar is integrally provided on the connecting bar and rotatably connected to the brake arm.

[0018] In one of the aforementioned clutch devices, two reinforcing strips are fixedly provided at intervals on the outer side of the connecting strip.

[0019] In one of the aforementioned clutch devices, a reinforcing groove is provided on one end face of the bending strip.

[0020] A washing machine includes the aforementioned clutch device.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows: In the first working state, the pawl and the ratchet driven by the drive unit remain engaged, so that the ratchet can only rotate in the first direction; when switching to the second working state, the brake arm rotates around the axis, and the push part on it pushes the connecting part, causing the pawl to rotate and disengage from the ratchet. At this time, the ratchet can achieve forward and reverse rotation, and at the same time, it drives the elastic reset part to compress and store energy, providing power support for subsequent automatic reset. This device realizes the switching of clutch function through mechanical linkage, without the need for additional fasteners, effectively reducing the number of parts and improving the compactness and space utilization of the overall structure. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the clutch mechanism;

[0023] Figure 2 yes Figure 1 A plan view;

[0024] Figure 3 yes Figure 1 A three-dimensional structural diagram of the connecting part.

[0025] In the figure, 100 is the drive unit; 101 is the ratchet; 102 is the housing; 200 is the brake arm; 201 is the pushing part; 202 is the abutting part; 300 is the pawl; 301 is the connecting part; 302 is the elastic reset part; 303 is the connecting hook; 304 is the connecting bar; 305 is the bending bar; 306 is the reinforcing bar; and 307 is the reinforcing groove. Detailed Implementation

[0026] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] like Figures 1-3 As shown, a clutch device includes:

[0029] Drive unit 100, on which a ratchet 101 is driven;

[0030] A brake arm 200 capable of rotating around an axis, and a pusher 201 is provided on the brake arm 200;

[0031] A pawl 300 is fixedly provided with a connecting part 301. The connecting part 301 is provided on the brake arm 200 and is rotatably connected to the brake arm 200. The pushing part 201 is in contact with the connecting part 301.

[0032] The elastic reset part 302 is connected to the connecting part 301;

[0033] In the first working state, the pawl 300 is engaged with the ratchet 101;

[0034] In the second working state, the brake arm 200 rotates and the pusher 201 pushes the connecting part 301 to rotate, the pawl 300 disengages from the ratchet 101, and the elastic reset part 302 is compressed and stores energy.

[0035] In this embodiment, in the first working state, the pawl 300 is engaged with the ratchet 101 driven by the drive unit 100, so that the ratchet 101 can only rotate in the first direction. When switching to the second working state, the brake arm 200 rotates around its axis, and the pusher 201 on it pushes the connecting part 301, causing the pawl 300 to rotate and disengage from the ratchet 101. At this time, the ratchet 101 can achieve forward and reverse rotation, and at the same time, it drives the elastic reset part 302 to compress and store energy, providing power support for subsequent automatic reset. This device realizes the switching of clutch function through mechanical linkage, without the need for additional fasteners, effectively reducing the number of parts and improving the compactness and space utilization of the overall structure.

[0036] Specifically, the pushing part 201 includes a pushing screw, which is screwed to the brake arm 200. The head of the screw abuts against the connecting part 301 of the pawl 300. By rotating and adjusting the pushing screw, the initial contact position of the connecting part 301 can be precisely controlled, thereby adjusting the engagement depth and disengagement stroke between the pawl 300 and the ratchet 101. This ensures stable and reliable transmission engagement and allows for precise rotation of the connecting part 301 when the brake arm 200 is activated, enabling rapid disengagement of the pawl 300 from the ratchet 101.

[0037] Further specified, the connecting part 301 is provided with an abutting part 202. In the first working state, the abutting part 202 abuts against the housing 102 of the driving part 100; in the second working state, the abutting part 202 is separated from the housing 102.

[0038] In this embodiment, in the first working state, the abutment portion 202 abuts against the housing 102 of the drive portion 100, ensuring that the pawl 300 and the ratchet 101 maintain an appropriate engagement depth. This ensures effective and stable power transmission while avoiding excessive wear or damage due to excessive engagement. When switching to the second working state, the brake arm 200 rotates, and the push screw pushes the connecting portion 301, causing the abutment portion 202 to separate from the housing 102. At this time, the pawl 300 rotates and disengages from the ratchet 101, and the elastic reset portion 302 is compressed and stores energy.

[0039] Specifically, the elastic reset part 302 includes a reset torsion spring. The connecting part 301 and the brake arm 200 are rotatably connected through a rotating shaft. The reset torsion spring is sleeved on the rotating shaft, and one of its pins abuts against the connecting part 301. The other pin of the reset torsion spring is connected to the housing 102 of the drive part 100.

[0040] In a further preferred embodiment, a connecting hook 303 is integrally provided on the connecting part 301, and one of the pins of the reset torsion spring is locked in the connecting hook 303.

[0041] Specifically, the connecting part 301 and the brake arm 200 are rotatably connected via a rotating shaft, and the return torsion spring is fitted onto this rotating shaft, ensuring that the return torsion spring can act around the same axis. One pin of the return torsion spring abuts against the connecting part 301, and the other pin is connected to the housing 102 of the drive part 100. This arrangement allows the return torsion spring to be compressed and store energy when the brake arm 200 rotates and causes the pawl 300 to disengage from the ratchet 101; once the external force on the brake arm 200 disappears, the return torsion spring can quickly release energy, pushing the connecting part 301 to rotate in the opposite direction, causing the pawl 300 to re-engage with the ratchet 101.

[0042] Furthermore, one of the pins of the reset torsion spring is locked inside the connecting hook 303, which enhances the connection stability between the reset torsion spring and the connecting part 301, reduces the risk of the pin falling off, and also facilitates installation and adjustment.

[0043] Specifically, the connecting part 301 includes an arc-shaped connecting strip 304, the inner arc surface of which points towards the center of the ratchet 101, and a pawl 300 integrally disposed at the end of the connecting strip 304. This arc-shaped design allows the connecting strip 304 to better fit the contour shape of the ratchet 101, ensuring that the pawl 300 maintains a good contact angle and engagement depth with the ratchet 101 during engagement. Furthermore, the arc-shaped structure of the connecting strip 304 helps optimize the movement trajectory of the pawl 300 under the drive of the brake arm 200, making it smoother when disengaging from or engaging the ratchet 101, reducing the risk of jamming or misalignment. The pawl 300 and the connecting strip 304 are an integral structure, which not only enhances the overall strength but also avoids the loosening problems that may exist in traditional split connections.

[0044] Furthermore, along the rotation direction of the pawl 300, the brake arm 200 is located on the side of the drive housing 102, while the connecting bar 304 is located on the side of the pawl 300, and a bent bar 305 is integrally provided on the connecting bar 304 to be rotatably connected to the brake arm 200.

[0045] In this embodiment, by placing the brake arm 200 on the side of the drive housing 102 and positioning the connecting bar 304 on the side of the pawl 300, the limited space can be utilized more effectively, making the entire clutch device more compact. This helps reduce the overall size of the device and provides more space for other components or functions. Furthermore, the integral molding design of the connecting bar 304 and the bending bar 305 enhances the overall rigidity and strength of the structure.

[0046] Preferably, two reinforcing strips 306 are fixedly provided at intervals on the outer side of the connecting strip 304. The reinforcing strips 306 are integrally formed with the connecting strip 304. Since the connecting strip 304 needs to withstand the pushing force from the brake arm 200 and the restoring force from the return torsion spring during operation, its stress situation is relatively complex. Providing two reinforcing strips 306 on the outer side can effectively improve the overall rigidity of the connecting strip 304, prevent it from bending or deforming during stress, thereby improving its load-bearing capacity and service life.

[0047] More preferably, a reinforcing groove 307 is provided on one end face of the bending strip 305. As a key component in the rotatable connection between the connecting strip 304 and the brake arm 200, the bending strip 305 bears significant forces during clutch engagement / disengagement. By providing the reinforcing groove 307 on its end face, the bending and shear resistance of this component can be effectively improved, preventing deformation or breakage due to concentrated stress, thereby extending its service life.

[0048] A washing machine includes the aforementioned clutch device.

[0049] It should be noted that in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly defined. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0050] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0051] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A clutch device, characterized in that, include: A drive unit, on which a ratchet is drivenly connected; A brake arm capable of rotating about an axis, wherein a pushing part is provided on the brake arm; A pawl is fixedly provided with a connecting part, which is disposed on the brake arm and rotatably connected to the brake arm. The pushing part is in contact with the connecting part. An elastic reset part is connected to the connecting part; In the first working state, the pawl is engaged with the ratchet; In the second working state, the brake arm rotates and the connecting part is driven to rotate by the pushing part, the pawl is disengaged from the ratchet, and the elastic reset part is compressed and stored.

2. The clutch device according to claim 1, characterized in that, The pushing part includes a pushing screw, which is screwed and fixed to the brake arm.

3. A clutch device according to claim 1, characterized in that, The connecting part is provided with an abutting part. In the first working state, the abutting part abuts against the housing of the driving part; in the second working state, the abutting part separates from the housing.

4. A clutch device according to claim 1, characterized in that, The elastic reset part includes a reset torsion spring. The connecting part and the brake arm are rotatably connected by a rotating shaft. The reset torsion spring is sleeved on the rotating shaft, and one of its pins abuts against the connecting part. The other pin of the reset torsion spring is connected to the housing of the drive part.

5. A clutch device according to claim 4, characterized in that, A connecting hook is integrally provided on the connecting part, and one of the pins of the reset torsion spring is locked in the connecting hook.

6. A clutch device according to claim 1, characterized in that, The connecting part includes an arc-shaped connecting strip, the inner arc surface of which points towards the center of the ratchet, and the pawl is integrally disposed at the end of the connecting strip.

7. A clutch device according to claim 6, characterized in that, Along the rotation direction of the pawl, the brake arm is disposed on the side of the housing of the drive unit, and the connecting bar is located on the side of the pawl. A bent bar is integrally provided on the connecting bar and is rotatably connected to the brake arm.

8. A clutch device according to claim 6, characterized in that, Two reinforcing strips are fixedly provided at intervals on the outer side of the connecting strip.

9. A clutch device according to claim 7, characterized in that, A reinforcing groove is provided on one end face of the bent strip.

10. A washing machine, characterized in that, Includes the clutch device as described in any one of claims 1-9 above.

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