CN107022874B - Clutch control method for washing machine and speed reduction clutch - Google Patents
Clutch control method for washing machine and speed reduction clutch Download PDFInfo
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- CN107022874B CN107022874B CN201610071498.XA CN201610071498A CN107022874B CN 107022874 B CN107022874 B CN 107022874B CN 201610071498 A CN201610071498 A CN 201610071498A CN 107022874 B CN107022874 B CN 107022874B
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- pawl
- ratchet wheel
- clutch
- washing machine
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/30—Driving arrangements
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
The invention provides a washing machine clutch control method and a speed reduction clutch, wherein the washing machine comprises a clutch mechanism, the clutch mechanism comprises a clutch holding spring, an upper ratchet wheel, a lower ratchet wheel, a first pawl and a second pawl, the rotating direction of the clutch holding spring is the same after the lower ratchet wheel is installed, the rotating direction of the clutch holding spring is opposite to that of the upper ratchet wheel after the upper ratchet wheel is installed, the first pawl is clamped with the lower ratchet wheel, when the second pawl is clamped with the upper ratchet wheel, the clutch holding spring is released to realize washing, the first pawl is separated from the lower ratchet wheel, and when the second pawl is separated from the upper ratchet wheel, the clutch holding spring is tightened to realize dehydration; the clutch control method comprises the following steps: the washing machine executes a washing/rinsing program, and controls the first pawl to be engaged with the lower ratchet wheel before the second pawl is engaged with the upper ratchet wheel. The clutch control method of the washing machine combines the working process of the washing machine and the action relation of the clutch mechanism, so that the clutch mechanism is more stable.
Description
Technical Field
The invention relates to the technical field of washing machines, in particular to a washing machine clutch control method and a speed reduction clutch.
Background
The clutch structure belongs to the core part of the decelerating clutch of the washing machine, and the mutual conversion of the washing machine from the washing state to the dehydrating state without stopping the machine mainly depends on the clutch mechanism. The clutch mechanism comprises a pawl arm, a brake arm, a ratchet wheel and a pawl. Generally, a clutch structure of a single pawl and a ratchet wheel is adopted, a pawl arm is tightly connected with the pawl, the pawl is in transmission connection with the ratchet wheel, and the ratchet wheel is in transmission connection with a clutch spring.
One end of a clutch holding spring of the clutch structure of the single pawl and the ratchet wheel is provided with 2 rings of tight rings, and the other end of the clutch holding spring is provided with a radial wire end which is embedded in a radial groove of the ratchet wheel. When washing, the pawl on the pawl arm blocks the ratchet wheel, the clutch holding spring is loosened, and when dewatering, the pawl on the pawl arm is separated from the ratchet wheel, and the clutch holding spring holds the brake wheel cover and the torque transmission shaft sleeve tightly. The clutch structure is suitable for a clutch with a one-way bearing, if the clutch does not have the one-way bearing, during washing, due to the following rotation of the inner barrel, in order to ensure that the pawl can effectively clamp the ratchet wheel and ensure the loosening state of the clutch holding spring, a more effective clutch structure is required.
The clutch structure adopting the double ratchet wheel pawls is a method for effectively solving the problem that the inner barrel follow-up phenomenon causes damage to the clutch structure when a one-way bearing is not adopted. In the existing clutch structure of the double-ratchet pawl, two pawls are generally simultaneously clamped and separated, so that no problem is caused when the washing machine normally works, but if the action of the clutch structure is not completely finished, the motor starts to work, and the clutch mechanism can be damaged.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
In order to solve the above problems, a first aspect of the present invention is to provide a clutch control method for a washing machine, which specifically adopts the following technical solution:
a washing machine clutch control method comprises a clutch mechanism, wherein the clutch mechanism comprises a clutch holding spring, an upper ratchet wheel, a lower ratchet wheel, a first pawl and a second pawl, the rotation direction of the lower ratchet wheel is the same as that of the clutch holding spring after installation, the rotation direction of the upper ratchet wheel is opposite to that of the clutch holding spring after installation, the first pawl is clamped with the lower ratchet wheel, when the second pawl is clamped with the upper ratchet wheel, the clutch holding spring is released to realize washing, the first pawl is separated from the lower ratchet wheel, and when the second pawl is separated from the upper ratchet wheel, the clutch holding spring is tightened to realize dehydration; the clutch control method comprises the following steps:
the washing machine executes a washing/rinsing program, and controls the first pawl to be engaged with the lower ratchet wheel before the second pawl is engaged with the upper ratchet wheel.
Further, the washing machine performs a washing/rinsing process, and the second pawl starts to engage with the upper ratchet wheel when the depth of the first pawl entering the teeth of the lower ratchet wheel exceeds 1/5 of the depth of the teeth, preferably 1/3 of the depth of the teeth.
Further, the clutch control method further comprises the following steps:
the washing machine executes a dehydration program, and controls the second pawl to start to separate from the upper ratchet wheel before the first pawl starts to separate from the lower ratchet wheel.
Further, the washing machine performs a dehydration process, and when the second pawl is more than 0.5mm away from the top of the upper ratchet wheel, the first pawl starts to separate from the lower ratchet wheel.
The second invention of the invention aims to provide a washing machine speed reduction clutch, in particular, the following technical scheme is adopted:
a washing machine deceleration clutch, the said clutch mechanism includes holding the spring, upper ratchet, lower ratchet and pawl arm from the clutch, upper ratchet and lower ratchet are fitted over and linked with both ends of holding the spring from the clutch separately, set up first pawl and second pawl on the pawl arm, the first pawl corresponds to the lower ratchet, the second pawl corresponds to the upper ratchet; the first pawl is clamped with the lower ratchet wheel, when the second pawl is clamped with the upper ratchet wheel, the clutch holding spring is loosened to realize washing, the first pawl is separated from the lower ratchet wheel, and when the second pawl is separated from the upper ratchet wheel, the clutch holding spring is tightened to realize dehydration; the relative angle between the first pawl and the second pawl satisfies: the washing machine executes a washing/rinsing program, and the first pawl and the lower ratchet wheel start to be clamped before the second pawl and the upper ratchet wheel start to be clamped; the washing machine executes a dehydration program, and the second pawl starts to separate from the upper ratchet wheel before the first pawl starts to separate from the lower ratchet wheel.
Furthermore, the first pawl is provided with a first action surface which is abutted against the lower ratchet wheel during clamping, and the second pawl is provided with a second action surface which is abutted against the upper ratchet wheel during clamping; the included angle between the first acting surface and the second acting surface is 135-165 degrees.
Further, the pawl arm comprises a connecting portion and an arm body, the connecting portion is fixedly mounted on the rotating shaft and rotates along with the rotating shaft, a first pawl is arranged at the end portion of the free end of the arm body, and a second pawl is arranged in the middle of the arm body.
Further, the first pawl is fixedly arranged on the arm body, and the second pawl is of an elastic structure or can move relative to the arm body.
Furthermore, the second pawl can be rotatably arranged on the arm body, and the rotating direction of the second pawl is opposite to the rotating direction of the upper ratchet wheel during dehydration.
Further, the device also comprises a speed reducing gear train and a shell; the speed reducing gear train is arranged in the shell, and a bearing seat is arranged at one end of the shell, which is close to the upper ratchet wheel; the pawl arm is further provided with a positioning mechanism, the surface of the outer ring of the bearing seat is a positioning surface of the positioning mechanism, and the pawl arm can be limited to further move when the positioning mechanism is in contact with the surface of the outer ring of the bearing seat.
The invention relates to a washing machine clutch control method, which is characterized in that a first pawl and a lower ratchet wheel are controlled to start to be engaged before a second pawl and an upper ratchet wheel start to be engaged when washing/rinsing, so that the first pawl and the lower ratchet wheel are combined firstly, the lower ratchet wheel is installed and then has the same rotating direction with a clutch holding spring, at the moment, the clutch holding spring is partially opened when the lower ratchet wheel rotates, and at the moment, if a motor is started, washing/rinsing can be realized without damaging a clutch.
In a similar way, when dewatering, the second pawl and the last ratchet separate earlier, and the separation and reunion spring is still in the open mode, and if this moment when the motor starts, the separation and reunion spring can not follow the pivot rotation, even first pawl does not separate with lower ratchet, also can not take place "beat the tooth" phenomenon, can not construct the damage to the separation and reunion machine.
Therefore, the clutch control method of the washing machine combines the working process of the washing machine and the action relation of the clutch mechanism, so that the clutch mechanism is more stable.
The arrangement of the first pawl and the second pawl of the washing machine speed reduction clutch can meet the requirement that the first pawl enters before exits in the rotation process of the pawl arm, and the integral stability of the clutch mechanism is ensured.
Drawings
FIG. 1 is a schematic view of a deceleration clutch of a washing machine according to the present invention;
FIG. 2 is a partial cross-sectional view of the speed reduction clutch of the washing machine of the present invention;
FIG. 3 is a front view of the pawl arm of the present invention;
FIG. 4 is a left side view of the ratchet arm of the present invention;
FIG. 5 is a rear view of the pawl arm of the present invention;
FIG. 6 is a right side view of the ratchet arm of the present invention;
FIG. 7 is a cross-sectional view taken along line B-B of FIG. 6 in accordance with the present invention;
FIG. 8 is a sectional view of a speed reduction clutch of the washing machine according to the present invention;
FIG. 9 is an exploded view of a clutch mechanism of the washing machine of the present invention;
FIG. 10 is a schematic view showing the structure of a braking band of a decelerating clutch of a washing machine according to the present invention.
Reference numbers in the drawings illustrate: 100-belt pulley 200-pawl arm 201-connecting arm 202-first pawl 203-second pawl 204-mounting shaft 205-positioning block 206-connecting part 207-arm 208-fixing hole 209-second positioning mechanism 210-positioning part 211-fixing nut 212-washer 213-reset spring 300-housing 301-bearing seat 400-brake arm 401-first connecting shaft 402-second connecting shaft 500-rotating shaft 600-resetting mechanism 700-upper end cover 800-water seal 900-output shaft sleeve 1000-output shaft 1101-lower ratchet 1102-upper ratchet 1200-clutch holding spring 1300-torque transmission shaft sleeve 1400-input shaft 1500-brake wheel cover 1600-bearing 1700-brake wheel 1800-brake belt 1801-1802-first belt bending 1803-first mounting hole 1804-reinforcing rib 1805-first welding spot 1806-second welding spot 1807-third welding spot 1808-second bending part 1809-second mounting hole 1810-fifth welding spot 1811-sixth welding spot 1812-fourth welding spot.
Detailed Description
The clutch control method and the speed reduction clutch of the washing machine according to the present invention will be described in detail with reference to the accompanying drawings:
a washing machine clutch control method comprises a clutch mechanism, wherein the clutch mechanism comprises a clutch holding spring, an upper ratchet wheel, a lower ratchet wheel, a first pawl and a second pawl, the rotation direction of the lower ratchet wheel is the same as that of the clutch holding spring after installation, the rotation direction of the upper ratchet wheel is opposite to that of the clutch holding spring after installation, the first pawl is clamped with the lower ratchet wheel, the clutch holding spring is loosened when the second pawl is clamped with the upper ratchet wheel, washing is realized, the first pawl is separated from the lower ratchet wheel, and the clutch holding spring is tightened when the second pawl is separated from the upper ratchet wheel, so that dehydration is realized; the clutch control method comprises the following steps:
the washing machine executes a washing/rinsing program, and controls the first pawl to be engaged with the lower ratchet wheel before the second pawl is engaged with the upper ratchet wheel.
The invention relates to a washing machine clutch control method, which controls a first pawl to be engaged with a lower ratchet wheel before a second pawl is engaged with an upper ratchet wheel during washing/rinsing, so that the first pawl and the lower ratchet wheel are combined firstly, the lower ratchet wheel is installed and then has the same rotating direction with a clutch holding spring, the clutch holding spring is partially opened when the lower ratchet wheel rotates, and washing/rinsing can be realized without damaging a clutch machine if a motor is started.
Furthermore, the washing machine executes a washing/rinsing program, and when the depth of the first pawl entering the teeth of the lower ratchet wheel exceeds 1/5 of the tooth depth, the second pawl and the upper ratchet wheel start to be clamped. Preferably, when the depth of the first pawl entering the teeth of the lower ratchet wheel exceeds 1/3 of the tooth depth, the second pawl and the upper ratchet wheel start to be clamped. Therefore, the first pawl can be guaranteed to complete clamping before the second pawl, when the first pawl completes clamping, washing/rinsing can be achieved even if the motor is started, and the clutch machine cannot be damaged.
The washing machine clutch control method of the invention also comprises the following steps: the washing machine executes a dehydration program, and controls the second pawl to start to separate from the upper ratchet wheel before the first pawl and the lower ratchet wheel start to separate.
Similarly, the second pawl and the upper ratchet wheel are separated firstly, the clutch holding spring is still in an open state, at the moment, if the motor is started, the clutch holding spring cannot rotate along with the rotating shaft, and even if the first pawl is not separated from the lower ratchet wheel, the tooth beating phenomenon cannot occur, and the clutch machine cannot be damaged.
Further, the washing machine performs a dehydration process, and when the second pawl is spaced apart from the top of the upper ratchet by more than 0.5mm, the first pawl starts to be separated from the lower ratchet. Therefore, the second pawl can be ensured to be separated before the first pawl, and when the second pawl is separated, even if the first pawl is not separated completely, the clutch can not be damaged if the motor is started.
Therefore, the clutch control method of the washing machine combines the working process of the washing machine and the action relation of the clutch mechanism, so that the clutch mechanism is more stable.
As shown in fig. 8 and 9, the present invention also provides a decelerating clutch for a washing machine, wherein the clutch mechanism includes a clutch holding spring 1200, an upper ratchet wheel 1102, a lower ratchet wheel 1101 and a pawl arm 200, the upper ratchet wheel 1102 and the lower ratchet wheel 1101 are respectively sleeved at two ends of the clutch holding spring 1200 and are linked with the same, the pawl arm 200 is provided with a first pawl 202 and a second pawl 203, the first pawl 202 corresponds to the lower ratchet wheel 1101, and the second pawl 203 corresponds to the upper ratchet wheel 1102; the first pawl 202 is clamped with the lower ratchet 1101, when the second pawl 203 is clamped with the upper ratchet 1102, the clutch holding spring 1200 is loosened to realize washing, the first pawl 202 is separated from the lower ratchet 1101, and when the second pawl 203 is separated from the upper ratchet 1102, the clutch holding spring 1200 is tightened to realize dehydration; the relative angle between the first pawl 202 and the second pawl 203 satisfies: the washing machine executes a washing/rinsing program, and the first pawl 202 and the lower ratchet wheel 1101 start to be clamped before the second pawl 203 and the upper ratchet wheel 1102 start to be clamped; the washing machine performs a spin-drying process in which the second pawl 203 starts to disengage from the upper ratchet 1102 before the first pawl 202 starts to disengage from the lower ratchet 1101.
The speed reduction clutch of the washing machine of the invention, by setting the proper angle of the first pawl 202 and the second pawl 203, makes: during washing/rinsing, the first pawl 202 and the lower ratchet 1101 are controlled to be engaged before the second pawl 203 and the upper ratchet 1102 are controlled to be engaged, so that the first pawl 202 and the lower ratchet 1101 are combined firstly, the lower ratchet 1101 is installed and then is the same as the rotating direction of the clutch holding spring 1200, at the moment, the clutch holding spring 1200 is partially opened when the lower ratchet 1101 rotates, and at the moment, if the motor is started, washing/rinsing can be realized without damaging the clutch; similarly, when dewatering, the second pawl 203 is separated from the upper ratchet 1102 first, the clutch holding spring is still in an open state, and at the moment, if the motor is started, the clutch machine cannot be damaged.
In order to realize the sequential engagement of the first pawl 202 and the second pawl 203 on the pawl arm 200, the first pawl 202 has a first acting surface which abuts against the lower ratchet 1101 when engaged, and the second pawl 203 has a second acting surface which abuts against the upper ratchet 1102 when engaged; the included angle between the first acting surface and the second acting surface is 135-165 degrees.
As shown in fig. 3, 4 and 5, the pawl arm 200 includes a connecting portion 206 and an arm body 207, the connecting portion 206 is fixedly mounted on the rotating shaft 500 and rotates together with the rotating shaft, a first pawl 202 is disposed at a free end of the arm body 207, and a second pawl 203 is disposed at a middle of the arm body. The connecting portion 206 of the present invention has a fixing hole 208 for fixing the rotating shaft 500.
In a preferred embodiment of the present invention, the first pawl 202 is fixedly disposed on the arm 200, and the second pawl 203 is of a resilient structure or is movable relative to the arm.
In order to ensure the molding effect of the mold and control the depth of the pawl cut into the ratchet wheel, the elastic claw and the fixed claw are designed to be matched. The two pawls are ensured to cut into 1/3-3/4, preferably 1/2-3/4, of the ratchet wheel in the initial state, and when the traction motor opens the brake arm 400 in the dehydration state, the two pawls need to disengage the ratchet wheel, and when the brake arm 400 opens the rated stroke, the distance between the pawls and the ratchet wheel needs to be disengaged is more than or equal to 1.5mm, preferably more than or equal to 2mm.
The first pawl 202 is fixedly arranged, and the second pawl 203 is rotatably arranged; the pawl arm 200 is provided with a second positioning mechanism, and the second positioning mechanism is arranged close to the second pawl 203 and used for limiting the rotation angle of the second pawl. The second positioning mechanism limits the second pawl 203 to rotate only in one direction, ensuring the overall stability of the clutch mechanism.
The second pawl 203 is rotatably installed on the installation shaft 204, the installation shaft 204 and the arm body 207 are integrally formed, the installation shaft 204 is sleeved with a return spring 213, one end of the return spring 213 is abutted against the arm body 207, and the other end of the return spring is abutted against the second pawl 203, so that the second pawl 203 is reset to ensure normal clamping.
Specifically, a reinforcing rib structure extends from one side of the pawl arm 200 close to the bearing seat 301, and a positioning surface is arranged on the reinforcing rib structure close to the second pawl 203.
As shown in fig. 1, 2, 8 and 9, in the washing state, the brake arm 400 is in the initial state, the first pawl 202 on the pawl arm 200 is engaged with the lower ratchet 1101, the second pawl 203 is engaged with the upper ratchet 1102, the clutch spring 1200 is pushed to release the brake wheel cover 1500 and the torque transmission shaft sleeve 1300, the motor drives the input shaft 1400 to rotate the output shaft 1000 through the speed reduction of the speed reduction gear train, so as to realize the washing/rinsing effect; in the dehydration state, the traction motor pulls the brake arm 400 open, the pawl arm 200 is opened correspondingly, the second pawl 203 is separated from the upper ratchet wheel 1102, the first pawl 202 is separated from the lower ratchet wheel 1101, the clutch holding spring 1200 holds the brake wheel cover 1500 and the torque transmission shaft sleeve 1300 tightly, and meanwhile, the brake belt 1800 releases the brake wheel 1700, so that the output shaft 1000 and the output shaft sleeve 900 are integrated into a whole to realize dehydration in high-speed unidirectional rotation.
Example one
As shown in fig. 1, a decelerating clutch of a washing machine includes a decelerating gear train, a housing 300 and a clutch mechanism; the clutch mechanism adopts a ratchet wheel and pawl clutch mode and comprises a ratchet wheel and a pawl arm 200, wherein the pawl arm 200 is provided with a pawl which is used for being clamped/separated with the ratchet wheel to realize washing/dehydration; the speed reducing gear train is arranged in a shell 300, and a bearing seat 301 is arranged at one end, close to the ratchet wheel, of the shell 300; the pawl arm 200 is further provided with a positioning mechanism, the outer ring surface of the bearing seat 301 is a positioning surface of the positioning mechanism, and when the positioning mechanism is in contact with the outer ring surface of the bearing seat 301, the pawl arm 200 can be limited to further move.
In the speed reduction clutch of the embodiment, the pawl arm 200 is provided with the positioning mechanism, the positioning mechanism takes the outer ring surface of the bearing seat 301 at the end part of the shell 300 of the speed reduction gear train as a positioning surface, and the bearing seat 301 has higher processing precision requirement, so that the positioning mechanism is more convenient to design under the condition that the parameters of the bearing seat 301 are determined, the pawl arm 200 can be effectively positioned, the deviation of the pawl on the pawl arm 200 in the process of opening and resetting the pawl arm 200 is avoided, and the clutch effect of the clutch is ensured.
The positioning mode of the ratchet arm 200 of the invention is suitable for the existing washing machine speed reduction clutch adopting a ratchet-pawl clutch mode, and comprises a single ratchet pawl type and a double ratchet pawl type. The following description will be made by taking a clutch mechanism of a double ratchet pawl type as an example, but the present embodiment is not limited to this clutch mechanism of a double ratchet pawl type.
As shown in fig. 8, 9 and 2, the clutch mechanism includes a clutch holding spring 1200, an upper ratchet 1102, a lower ratchet 1101 and a pawl arm 200, the upper ratchet 1102 and the lower ratchet 1101 are respectively sleeved at two ends of the clutch holding spring 1200 and are linked with the same, the pawl arm 200 is provided with a first pawl 202 and a second pawl 203, the first pawl 202 corresponds to the lower ratchet 1101, and the second pawl 203 corresponds to the upper ratchet 1102; the first pawl 202 is clamped with the lower ratchet 1101, when the second pawl 203 is clamped with the upper ratchet 1102, the clutch holding spring 1200 is loosened to realize washing, the first pawl 202 is separated from the lower ratchet 1101, and when the second pawl 203 is separated from the upper ratchet 1102, the clutch holding spring 1200 is tightened to realize dehydration; the positioning mechanism is used for limiting the further movement of the pawl arm 200 after the first pawl 202 is clamped with the lower ratchet 1101 and the second pawl 203 is clamped with the upper ratchet 1102.
The speed reduction clutch of the embodiment adopts a double-ratchet wheel and pawl clutch mode, after the first pawl 202 is clamped with the lower ratchet wheel 1101 and the second pawl 203 is clamped with the upper ratchet wheel 1102, the positioning mechanism is in contact with the outer ring surface of the bearing seat 301, further movement of the pawl arm 200 is limited, on one hand, stability of clamping the first pawl 202 with the lower ratchet wheel 1101 and clamping the second pawl 203 with the upper ratchet wheel 1102 can be ensured, and on the other hand, extrusion damage to ratchet teeth or pawls due to further movement of the pawl arm 200 can be avoided.
Therefore, as shown in fig. 3, 4 and 5, the pawl arm 200 includes a connecting portion 206 and an arm body 207, the connecting portion 206 is fixedly mounted on the rotating shaft 500 and rotates together with the rotating shaft, the free end of the arm body 207 is provided with the first pawl 202, the middle of the arm body is provided with the second pawl 203, and the positioning mechanism is arranged between the first pawl 202 and the second pawl 203.
In the present embodiment, the positioning mechanism is disposed between the first pawl 202 and the second pawl 203, which is determined by the position relationship after the ratchet pawls are engaged, because the first pawl 202 engages the lower ratchet 1101 and the second pawl 203 engages the upper ratchet 1102, the part between the first pawl 202 and the second pawl 203 on the pawl arm 200 is concentric with the two ratchets, and the distance between the part and the edge of the ratchets is shortest, and because the ratchets are disposed coaxially with the bearing seat 301, the distance between the part between the first pawl 202 and the second pawl 203 on the pawl arm 200 and the bearing seat 301 is also shortest. Therefore, the positioning mechanism is arranged between the first pawl 202 and the second pawl 203, and is more easily contacted with the outer ring surface of the bearing seat 301, so that the positioning is realized.
The connecting portion 206 of this embodiment has a fixing hole 208 for fixing and installing the rotating shaft 500.
Specifically, the positioning mechanism comprises a connecting arm 201 and a positioning block 205, the connecting arm 201 is integrally formed with an arm body 207 of the pawl arm 200, the connecting arm 201 is arranged on one side, close to the shell 300, of the arm body 207 of the pawl arm 200, the positioning block 205 is arranged at one end, extending towards the shell 300, of the connecting arm 201, and the positioning block 205 is arranged to protrude out of the inner side surface of the connecting arm 201; the positioning block 205 has a positioning surface contacting with the outer ring surface of the bearing seat. The speed reduction clutch of the washing machine of the embodiment only protrudes to the housing 300 to realize the contact positioning with the bearing seat 301, so that the material of the ratchet arm 200 can be saved, and the cost is reduced.
Further, the connecting arm 201 is formed by extending a protruding plane from the inner side wall of the arm body of the ratchet arm 200 toward one side of the housing, and a plurality of reinforcing ribs are arranged on the upper surface of the protruding plane and connect the free end of the protruding plane and the outer side wall of the arm body of the ratchet arm. Therefore, on the basis of ensuring the integral strength of the positioning mechanism, the material is reduced, and the manufacturing cost is reduced.
Furthermore, the positioning mechanism further comprises an elastic cushion pad, and the elastic cushion pad is arranged on the positioning surface of the positioning block. Because the positioning mechanism is when fixing a position, the locating piece has certain speed impact on the outer lane surface of bearing frame usually, therefore, at the instant of location contact, receive the reverse impulsive force on the outer lane surface of bearing frame great, very easily lead to the locating piece to break. According to the invention, the elastic cushion pad can effectively reduce the impact force on the surface of the outer ring of the bearing seat when the positioning mechanism is positioned, and the fracture between the positioning block and the connecting arm is avoided, so that the positioning effectiveness is ensured, and the service life of the positioning mechanism is prolonged.
Further, the positioning block 205 has an arc surface, and the arc surface can be attached to the outer ring surface of the bearing seat 301. Therefore, the tightness of the fit between the positioning block 205 of the positioning mechanism and the outer ring surface of the bearing seat 301 can be ensured, and the positioning stability can be ensured.
Furthermore, the central angle corresponding to the arc surface of the positioning block 205 is 20 to 40 degrees, so that the area of the positioning surface of the positioning block 205 is ensured, and the positioning stability is ensured.
Still further, the width of the positioning block 205 is 1/3 to 2/3, preferably 1/2 to 2/3, of the width of the outer ring of the bearing seat 301, so as to further ensure the size of the positioning surface area of the positioning block 205 and ensure the positioning stability.
As a preferred implementation manner of this embodiment, when the positioning mechanism contacts with the outer ring surface of the bearing seat 301, the depth of the pawl penetrating into the teeth of the ratchet wheel is as follows: the tooth height of the 1/3 ratchet wheel is 3/4 ratchet wheel. Therefore, on one hand, the tooth depth at least 1/3 of the ratchet wheel can ensure the effectiveness and stability of clamping, on the other hand, the tooth depth less than 3/4 of the ratchet wheel can ensure the smooth separation of the pawl and the ratchet wheel, and simultaneously, the serious damage of the tooth due to extrusion between the pawl and the ratchet wheel is avoided, and the service life is ensured.
As shown in fig. 6, the first pawl 202 of the present embodiment is fixedly disposed, and the second pawl 203 is rotatably disposed; the pawl arm 200 is provided with a second positioning mechanism 209, and the second positioning mechanism 209 is arranged near the second pawl 203 and used for limiting the rotation angle of the second pawl 203. The second detent mechanism 209 limits the second pawl 203 to rotate in only one direction, ensuring overall stability of the clutch mechanism. Correspondingly, the second pawl 203 is provided with a positioning part 210 which is matched with the second positioning mechanism 209.
As shown in fig. 7, the second pawl 203 is rotatably mounted on a mounting shaft 204, one end of the mounting shaft 204 is fixed to the arm 207, and the other end of the mounting shaft 204 is mounted with a fixing nut 211 to limit the axial movement of the second pawl 203. The mounting shaft 204 or the pawl arm 200 is sleeved with a return spring 213, one end of the return spring 213 is abutted against the arm 207, and the other end of the return spring is abutted against the second pawl 203, so that the second pawl 203 is reset to ensure normal clamping. Specifically, a reinforcing rib structure extends from one side of the pawl arm 200 close to the bearing seat 301, and a positioning surface is arranged on the reinforcing rib structure close to the second pawl 203.
The pawl arm 200 of this embodiment is located on the outer lane surface of the bearing frame 301 of casing 300, because the bearing frame 301 is the tensile processing of precision, excircle size precision is higher, and the locating surface is in two pawl intermediate positions, can guarantee effectively that the pawl arm 200 can fix a position well, avoids two pawl positions on the pawl arm 200 to open and reset the in-process at the pawl arm 200 and produce the skew to ensure the separation and reunion effect of clutch.
Example two
As shown in fig. 3, the positioning surface of the positioning mechanism of the ratchet arm 200 of the present embodiment has a height L1 of 13mm from the bottom plane of the fixing hole 208 of the ratchet arm 200. As shown in fig. 4, the positioning surface of the positioning mechanism of the pawl arm 200 is an arc surface centered at a position 57mm below the center line H1 of the fixing hole 208 of the pawl arm 200, the arc radius R1 is 20.8mm, the included angle α between both sides is 27.6 °, and is symmetrical around the perpendicular line at a position 57mm below the center line H1 of the fixing hole 208 of the pawl arm 200, the linear distance H2 between both sides is 11.4mm, and the thickness L2 is 5mm.
EXAMPLE III
As shown in fig. 10, the braking band of the decelerating clutch of the washing machine includes a band body 1801, the band body 1801 is a flat strip structure, at least one end of the band body 1801 is installed on the braking arm 400, one end of the band body 1801 connected with the braking arm 400 is provided with a bending part bent in a reverse direction, a mounting hole is formed between the bending part and the band body, and a free end of the bending part and the band body are welded into an integral structure.
In the braking band of the decelerating clutch of the washing machine, the connection end of the band body 1801 and the braking arm 400 is changed from the existing riveting mode to welding, the arrangement of riveting holes does not need to be considered, the connection length of the end part of the band body 1801 can be shortened to a certain extent, the length of the reinforcing rib 1804 on the band body can be lengthened, the bending deformation is avoided when the braking band is subjected to roll forming, and the tension of the braking band is ensured when the braking arm 400 opens the braking band to be disengaged from the braking wheel.
When the riveting mode is adopted, the connection tightness can be ensured only if the opening position and the size of the riveting hole have certain requirements, so that the connection length is relatively large when the riveting mode is adopted. This embodiment changes it into the welding, through with kink and area body 1801 heating, reheat welding pressfitting makes it connect as an organic wholely, has avoided the riveting hole, and connection length is shorter.
In addition, the welding mode is simpler and is easier to realize.
Further, at least three welding points are arranged between the bending part and the belt body 1801. On one hand, the connection strength can be ensured, and on the other hand, the process difficulty can be reduced.
The width of the belt body at the mounting hole is narrowed, the free end of the bending part is the same as the width of the belt body, three welding spots are arranged between the bending part and the belt body, the two welding spots are arranged at the same positions of the bending part and the width of the belt body and symmetrically arranged on two sides of the central line of the belt body, and the other welding spot is arranged at the narrowed position of the width of the belt body. The purpose of narrowing the strap 1801 at the mounting hole is to mount the brake strap on the brake arm 400, thereby saving the mounting space.
The brake band of this embodiment is applicable to a deceleration clutch of a washing machine having one end fixed to housing 300 and the other end connected to brake arm 400, and also applicable to a deceleration clutch of a washing machine having both ends connected to brake arm 400, respectively.
As shown in fig. 8, 9 and 10, the braking belt of the speed reduction clutch for the washing machine is suitable for the speed reduction clutch of the washing machine, two ends of the belt body 1801 are respectively installed on the braking arm 400, two ends of the belt body are respectively provided with a bending part which is bent reversely, a mounting hole is respectively formed between the bending part at the two ends and the belt body, and a free end of the bending part at the two ends and the belt body are welded into an integral structure.
Further, one end of the tape body is a first bending portion 1802, and is correspondingly provided with a first mounting hole 1803; the other end is a second bending part 1808, which is correspondingly provided with a second mounting hole 1809; the first mounting hole 1803 is mounted at the distal end of the brake arm 400, and the length of the first bent portion 1802 is longer than that of the second bent portion 1808. The present embodiment sets the length of the first bend 1802 and the length of the second bend 1808 different according to the structural characteristics of the brake band mounted on the brake arm 400 for easy connection. Further, since the first mounting hole 1803 is mounted at the distal end of the brake arm 400, the first bent portion 1802 has a length longer than that of the second bent portion 1808.
Specifically, the first mounting hole 1803 is mounted on the first coupling shaft 401, and the second mounting hole 1809 is mounted on the second coupling, 402, the second coupling, 402 being disposed inside the first coupling shaft 401.
Specifically, a first welding point 1805, a second welding point 1806, and a third welding point 1807 are disposed between the first bending portion 1802 and the tape body 1801, and the first welding point 1805 is disposed near the first mounting hole 1803; a fourth welding point 1812, a fifth welding point 1810 and a sixth welding point 1811 are arranged between the second bending part 1808 and the tape body 1801, and the fourth welding point 1812 is arranged close to the second mounting hole 1809; the distance between the first welding point 1805 and the first mounting hole 1803 is equal to the distance between the fourth welding point 1812 and the second mounting hole 1809. Thus, the connection fastening degree near the installation hole is ensured.
Further, the distance between the second welding point 1806 and the third welding point 1807 is equal to the distance between the fifth welding point 1810 and the sixth welding point 1811. Thus, the connection fastening degree of the end of the bent part is ensured.
Specifically, the diameter of the welding point between the bending part and the belt body is not less than 4mm. Thus, the strength of the welding is ensured.
As a preferred embodiment of this embodiment, the belt body is provided with a reinforcing rib 1804, the reinforcing rib 1804 is disposed along the central line of the belt body, and the length of the reinforcing rib 1804 is not less than 85% of the length of the belt body. The brake band of the embodiment adopts a welding mode, so that the length of the joint is shortened, the length of the reinforcing ribs 1804 can be lengthened as much as possible, bending deformation is avoided when the brake band is subjected to roll forming, and the tension of the brake band is ensured when the brake arm 400 is opened and the brake band is separated from the brake wheel.
The brake band of the embodiment is welded, compared with riveting connection, the space is saved, the length of the reinforcing rib 1804 of the brake band can be correspondingly lengthened, so that the rigidity of the brake band is guaranteed, bending deformation is avoided when the brake band is subjected to roll forming, and the tension of the brake band is guaranteed when the brake arm is opened and the brake band is separated from the brake wheel.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (11)
1. A washing machine clutch control method comprises a clutch mechanism, wherein the clutch mechanism comprises a clutch holding spring, an upper ratchet wheel, a lower ratchet wheel, a first pawl and a second pawl, the rotation direction of the lower ratchet wheel is the same as that of the clutch holding spring after installation, the rotation direction of the upper ratchet wheel is opposite to that of the clutch holding spring after installation, the first pawl is clamped with the lower ratchet wheel, the clutch holding spring is loosened when the second pawl is clamped with the upper ratchet wheel, washing is realized, the first pawl is separated from the lower ratchet wheel, and the clutch holding spring is tightened when the second pawl is separated from the upper ratchet wheel, so that dehydration is realized; the clutch control method is characterized by comprising the following steps:
the washing machine executes a washing/rinsing program, and controls the first pawl to be clamped with the lower ratchet wheel before the second pawl is clamped with the upper ratchet wheel;
the clutch mechanism also comprises a pawl arm which comprises an arm body,
the first pawl is arranged at the end part of the free end of the arm body, and the second pawl is arranged in the middle of the arm body;
the first pawl is fixedly arranged on the arm body, and the second pawl can move relative to the arm body;
a second positioning mechanism is arranged on the pawl arm,
the second positioning mechanism is arranged close to the second pawl and limits the rotating direction and the rotating angle of the second pawl;
the clutch mechanism also comprises a return spring,
one end of the reset spring is abutted against the arm body, and the other end of the reset spring is abutted against the second pawl.
2. The clutching control method of the washing machine as claimed in claim 1, wherein the washing machine performs a washing/rinsing process, and when the depth of the first pawl entering the teeth of the lower ratchet wheel exceeds 1/5 of the depth of the teeth, the second pawl starts to engage with the upper ratchet wheel.
3. The clutch control method of claim 2, wherein the second pawl starts to engage with the upper ratchet wheel when the tooth depth exceeds 1/3.
4. A clutch control method of a washing machine according to any one of claims 1 to 3, further comprising:
the washing machine executes a dehydration program, and controls the second pawl to start to separate from the upper ratchet wheel before the first pawl starts to separate from the lower ratchet wheel.
5. The clutching control method of a washing machine as claimed in claim 4, wherein the washing machine performs a spin-drying process, and the first pawl starts to disengage from the lower ratchet wheel when the second pawl is more than 0.5mm away from the top of the upper ratchet wheel.
6. A washing machine deceleration clutch adopting the clutch control method according to any one of claims 1 to 5, wherein the clutch mechanism comprises a clutch holding spring, an upper ratchet wheel, a lower ratchet wheel and a pawl arm, the upper ratchet wheel and the lower ratchet wheel are respectively sleeved at two ends of the clutch holding spring and are linked with the clutch holding spring, a first pawl and a second pawl are arranged on the pawl arm, the first pawl corresponds to the lower ratchet wheel, and the second pawl corresponds to the upper ratchet wheel; the first pawl is clamped with the lower ratchet wheel, when the second pawl is clamped with the upper ratchet wheel, the clutch holding spring is loosened to realize washing, the first pawl is separated from the lower ratchet wheel, and when the second pawl is separated from the upper ratchet wheel, the clutch holding spring is tightened to realize dehydration;
characterized in that the relative angle between the first pawl and the second pawl satisfies: the washing machine executes a washing/rinsing program, and the first pawl and the lower ratchet wheel start to be clamped before the second pawl and the upper ratchet wheel start to be clamped; the washing machine executes a dehydration program, and the second pawl starts to separate from the upper ratchet wheel before the first pawl starts to separate from the lower ratchet wheel.
7. The decelerating clutch for washing machine as claimed in claim 6, wherein the first pawl has a first acting surface abutting against the lower ratchet wheel when engaged, the second pawl has a second acting surface abutting against the upper ratchet wheel when engaged, and an included angle between the first acting surface and the second acting surface is 135 ° to 165 °.
8. A decelerating clutch for a washing machine according to claim 6 or 7, wherein the pawl arm comprises a connecting portion and an arm body, the connecting portion being fixedly mounted on the shaft and rotatable therewith, the arm body having a first pawl at a free end thereof and a second pawl at a central portion thereof.
9. The decelerating clutch for a washing machine as claimed in claim 8, wherein the first pawl is fixedly disposed on the arm, and the second pawl is of a resilient structure or is movable relative to the arm.
10. The decelerating clutch for a washing machine as claimed in claim 9, wherein the second pawl is rotatably provided on the arm, and the second pawl is rotated in a direction opposite to a direction in which the upper ratchet wheel is rotated during spinning.
11. The decelerating clutch for a washing machine according to claim 6 or 7, further comprising a decelerating gear train and a housing; the speed reducing gear train is arranged in the shell, and a bearing seat is arranged at one end of the shell, which is close to the upper ratchet wheel; the pawl arm is further provided with a positioning mechanism, the surface of the outer ring of the bearing seat is a positioning surface of the positioning mechanism, and the pawl arm can be limited to further move when the positioning mechanism is in contact with the surface of the outer ring of the bearing seat.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610071498.XA CN107022874B (en) | 2016-02-01 | 2016-02-01 | Clutch control method for washing machine and speed reduction clutch |
| PCT/CN2017/071905 WO2017133488A1 (en) | 2016-02-01 | 2017-01-20 | Clutch control method and speed reduction clutch for washing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610071498.XA CN107022874B (en) | 2016-02-01 | 2016-02-01 | Clutch control method for washing machine and speed reduction clutch |
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| Publication Number | Publication Date |
|---|---|
| CN107022874A CN107022874A (en) | 2017-08-08 |
| CN107022874B true CN107022874B (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610071498.XA Active CN107022874B (en) | 2016-02-01 | 2016-02-01 | Clutch control method for washing machine and speed reduction clutch |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111118827B (en) * | 2018-10-31 | 2022-10-28 | 无锡小天鹅电器有限公司 | Brake for drum washing machine and drum washing machine |
| CN111336191B (en) * | 2019-11-29 | 2021-10-26 | 无锡小天鹅电器有限公司 | Clutch assembly and washing machine with same |
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| CN2155384Y (en) * | 1993-06-07 | 1994-02-09 | 赖吉洪 | Inner and outer shaft engaging and disengaging gear for fully-automatic washing machine |
| JP2001129290A (en) * | 1999-11-04 | 2001-05-15 | Matsushita Electric Ind Co Ltd | Washing machine |
| CN2579926Y (en) * | 2002-01-22 | 2003-10-15 | 金羚电器有限公司 | Washing machine clutch of screw knob spring clutch structure |
| CN2736399Y (en) * | 2004-09-24 | 2005-10-26 | 肇庆市自动化仪表二厂有限公司 | Engaging and disengaging gear for clutch of fully-automatic biomimetic hand-rubbing type washing machine |
| CN200985442Y (en) * | 2006-03-08 | 2007-12-05 | 肇庆华尔车辆检测设备有限公司 | Holding spring type clutching device |
| CN203768672U (en) * | 2014-03-20 | 2014-08-13 | 浙江三星机电股份有限公司 | Washing machine speed reducing clutch |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6665899B2 (en) * | 2000-09-19 | 2003-12-23 | Samsung Electronics Co., Ltd. | Washing machine and its washing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2155384Y (en) * | 1993-06-07 | 1994-02-09 | 赖吉洪 | Inner and outer shaft engaging and disengaging gear for fully-automatic washing machine |
| JP2001129290A (en) * | 1999-11-04 | 2001-05-15 | Matsushita Electric Ind Co Ltd | Washing machine |
| CN2579926Y (en) * | 2002-01-22 | 2003-10-15 | 金羚电器有限公司 | Washing machine clutch of screw knob spring clutch structure |
| CN2736399Y (en) * | 2004-09-24 | 2005-10-26 | 肇庆市自动化仪表二厂有限公司 | Engaging and disengaging gear for clutch of fully-automatic biomimetic hand-rubbing type washing machine |
| CN200985442Y (en) * | 2006-03-08 | 2007-12-05 | 肇庆华尔车辆检测设备有限公司 | Holding spring type clutching device |
| CN203768672U (en) * | 2014-03-20 | 2014-08-13 | 浙江三星机电股份有限公司 | Washing machine speed reducing clutch |
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| CN107022874A (en) | 2017-08-08 |
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