CN107997705A - Double ratchet wheels swing type is from drying of mop - Google Patents

Abstract

The invention provides a double-ratchet swinging self-wringing mop, comprising: a mop rod, and a mop rod pawl is arranged at the middle and lower part of the mop rod; a rotating sleeve assembly, which is sleeved on the bottom of the mop rod and Sliding up and down along the mop rod, the rotating sleeve assembly includes a rotating cylinder sleeved on the mop rod and an outer sleeve sleeved on the rotating cylinder. There are several claws on the bottom of the rotating cylinder, and an outer sleeve is provided on the inner wall of the outer sleeve. The ratchet, the outer ratchet of the rotary drum is arranged on the rotary drum, the pawl of the outer sleeve and the outer ratchet of the rotary drum are constantly meshed, and the inner ratchet of the rotary drum is arranged on the inner wall of the rotary drum and above the outer ratchet of the rotary drum; the mop head, the bottom of the mop head It is fixed at the bottom of the mop rod, and the top of the mop head is provided with a button hole and arranged on the rotary cylinder, and is fixed by claws so that the top of the mop head and the rotary cylinder rotate synchronously. The present invention can realize the function of avoiding getting hands in cold water and dirty water, automatically and easily wringing out the mop, and is suitable for places such as families, hotels, offices and the like.

Description

Double Ratchet Oscillating Self-Wringing Mop

technical field

The invention relates to the technical field of non-wet hand wringing of a cotton cloth (thread) mop head, in particular to a double-ratchet swing type labor-saving self-wringing mop.

Background technique

At present, there are many kinds of mops on the market. The traditional cotton strip (thread) mop has the strongest applicability and is the most widely used. However, after cleaning the cotton strip (thread), most of them need to be wrung out with the mop head in hand. The hands of the user are easily eroded by dirty water. In winter, when the hot water supply is inconvenient, using cold water to wash the mop is more harmful to the hands. Some spin-drying mops use the auxiliary wringer device to dehydrate the mop, which can avoid the suffering of dirty water and cold water wet hands, but the structure of the spin-drying bucket is relatively complicated, the cost is high, and dirty water will splash around when spinning, causing secondary damage. In addition, due to the complex structure of the drying barrel, it is not easy to clean, which will cause bacteria to grow in the barrel.

The existing cotton (thread) mop self-wringing mop structure mainly has a rotary wringing type. One end of the mop head is fixed on the mop rod, and the other end is fixed on a structure that can rotate relative to the mop rod. During operation, one hand holds the mop rod , holding the relative rotation structure with one hand, and turning the mop rod or the relative rotation structure by hand to realize the wringing of the mop head.

Although the automatic drying mop that needs an auxiliary wringing device can avoid the pain of dirty hands and cold water, the structure of the drying bucket is relatively complicated, the cost is high, and dirty water will splash around when drying, causing secondary pollution , due to the complex structure of the drying barrel, it is not easy to clean, which will cause bacteria to grow in the barrel.

Self-wringing mops generally require more and more force in the later stage of the wringing process, otherwise the relative rotation cannot be realized, and the mop cannot be screwed to an appropriate dryness as required; some self-wringing mops also have complex structures and high costs. shortcoming.

Chinese patent CN 201710233871.1 discloses a labor-saving water-twisting mop, including a mop rod. The one-way locking teeth are equipped with a center wheel under the one-way locking teeth, and a number of planetary gears are set on the inner side of the bottom of the handle sleeve. connection, the bottom end of the mop rod is provided with a fixing frame. This patent realizes the function of increasing torque through planetary gear reduction, but the structure of the reduction mechanism is complicated, the installation is difficult, and the cost is high.

Chinese patent CN 200920200625.7 discloses a manually twisted water mop, including a rod, which is connected with a handle, a rod head, a protective glove, and a handle. On the fixing part, the other end of the mop is fixed on the twisting water body, the twisting water body is matched with the grip handle, and the rod is also connected with an elastic buckle and a rotating body. There are ratchets on the inner surface of the rotating body, pawls on the outer surface of the elastic buckle, and the pawls for the elastic buckle cooperate with the ratchets on the rotating body. Two spring buckles and a rotating body matched with it are added to the rod, and the ratchet can only rotate along the forward direction of the ratchet, so that the rotating body can only rotate in one direction, so as to achieve the function of rotating and positioning to lock the mop. This patent adds a spring buckle and a rotating body so that the rotating body can only rotate in one direction to achieve the effect of rotating and positioning to lock the mop, but there is no booster device and no labor-saving effect.

To sum up, designing a self-wringing mop with a simple structure, easy cleaning, no need for an auxiliary wringing device, and low cost is the wish of every family and professional cleaners.

Contents of the invention

Aiming at the defect that the self-wringing mop of the current technology is more laborious to wring, the present invention provides a double-ratchet swinging self-wringing mop, which can wring the mop with a small force, and at the same time, the mop does not need to be touched by hand during the whole process. The mop can be wrung out easily. The specific plan is as follows:

A double ratchet oscillating self-wringing mop comprising:

A mop rod, and a mop rod ratchet is arranged at the middle and lower part of the mop rod;

Rotating sleeve assembly, the rotating sleeve assembly is sleeved on the bottom of the mop rod and can slide up and down along the mop rod, the rotating sleeve assembly includes a rotary cylinder sleeved on the mop rod and a sleeve On the outer sleeve on the rotary drum, the bottom of the rotary drum is provided with several claws, the inner wall of the outer sleeve is provided with outer sleeve ratchets, and the outer wall of the rotary drum is provided with an outer ratchet of the rotary drum. The ratchet of the outer sleeve is constantly engaged with the outer ratchet of the rotary drum, and the inner ratchet of the rotary drum is arranged on the inner wall of the rotary drum and above the outer ratchet of the rotary drum;

A mop head, the bottom of the mop head is fixed on the bottom end of the mop rod, the top of the mop head is provided with a button hole and is arranged on the rotary drum, and is fixed by the claw so that the top of the mop head is in contact with the mop rod. The rotary cylinder rotates synchronously;

When the rotating sleeve assembly is slid up to a certain position on the mop rod, the inner ratchet of the rotary drum engages with the ratchet of the mop rod, and the outer sleeve ratchet moves the outer ratchet of the rotary drum to drive the The swivel drum rotates relative to the mop rod.

Further, the inner wall of the outer sleeve is fixed with a rivet to fix the pawl of the outer sleeve, the outer wall is fixed with a first handle seat by a rivet, and the outer wall of the outer sleeve is provided with a card slot above the first handle seat, A toggle handle is connected to the first handle seat through its own pin shaft;

When working without wringing, turn the toggle handle to snap into the card slot, and position it parallel to the mop rod.

When wringing out the work, turn the toggle handle to get out of the draw-in slot, so that the torque applied to the rotary cylinder is increased.

Further, the upper part of the mop rod is provided with a second handle seat, and the second handle seat is inserted with a mop rod handle, and the mop rod handle includes a pin inserted in the second handle seat and a pin hinged on the pin shaft. A grip handle at the outer end, the grip handle can rotate up and down around the fixing pin.

Further, the bottom of the rotary drum is provided with an outwardly extending disk, the diameter of which is larger than the diameter of the hole on the top of the mop head, and several claws are provided on the outer edge of the disk.

Further, a lock ring is provided at the button hole on the top of the mop head, and a toothed lock bar with an adjustable button hole size is arranged in the lock ring, and the lock bar is tightened to lock the top of the mop head Fastened to the bottom of the turret.

Further, a section of thread is provided on the top of the rotary cylinder, and nuts are arranged on the thread, and a retaining ring is provided on the outer wall of the rotary cylinder below the thread, and the outer sleeve sleeved on the rotary cylinder is limited to the Between the nut and the retaining ring.

Further, the bottom of the mop head is provided with an internal thread assembly, the bottom of the mop rod is provided with an external thread assembly, and the external thread assembly is installed on the internal thread assembly to fix the bottom of the mop head on the the bottom of the mop rod.

Further, the outer ratchet of the rotary cylinder is embedded in a concave position in the middle of the outer wall of the rotary cylinder, and is positioned by a rivet, so that the ratchet of the outer sleeve is constantly meshed with the outer ratchet of the rotary cylinder.

Further, a plastic ring is provided at the middle and lower part of the mop rod, and a tongue-shaped pawl of the mop rod is provided on both sides of the plastic ring.

Further, each claw is a claw arranged at the bottom of the rotary drum and extending outward.

In the present invention, one end of the mop head is fixed on the lower end of the mop rod, which cannot rotate freely, and the other end of the mop head is fixed on the lower end of the rotary cylinder which is set on the mop rod and can rotate freely; A pair of ratchet and pawl mechanisms with opposite linkage directions are arranged between the sleeves, which can convert the reciprocating swing of the sleeve into the one-way rotation of the rotary cylinder; the upper end of the mop head rotates with the rotary cylinder, and the lower end is fixed, so as to realize wringing The function of the mop head. The sleeve and the mop rod are respectively equipped with handles, which can increase the torque applied to the mop by the operator and realize the labor-saving function. You don't need to touch the mop head during the whole process, and you can easily wring the mop dry.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the descriptions of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only of the present invention. For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

Fig. 1 is the assembly diagram of a kind of double ratchet swing type self-wringing dry mop provided by the present invention;

Fig. 2 is the schematic diagram of rotating sleeve assembly;

Figure 3 shows a schematic diagram of the engagement of the outer sleeve pawl with the outer ratchet of the rotary drum;

Fig. 4 is a schematic diagram of a rotary drum without the outer ratchet of the rotary drum;

Fig. 5 shows the schematic diagram of the ratchet in the rotary drum in the rotary drum;

Figure 6 shows a schematic view of the tongue-shaped mop rod pawl on the mop rod;

Fig. 7 is a schematic diagram of the outer cylinder.

Detailed ways

In the following description, numerous specific details are given in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without one or more of these details. In other examples, some technical features known in the art are not described in order to avoid confusion with the present invention.

In order to thoroughly understand the present invention, detailed steps and detailed structures will be provided in the following description, so as to illustrate the technical solution of the present invention. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments besides these detailed descriptions.

The invention provides a double ratchet labor-saving self-wringing mop. Through two pairs of ratchet and pawl mechanisms that are not linked at the same time, one pair is constantly meshing, the other pair is only meshing during wringing work, and a pair of handles can easily wring the mop. , to avoid the pain of laborers' hands being eroded by dirty water and cold water, to achieve the purpose of simple structure, easy cleaning and cost reduction.

The present invention provides a double-ratchet swing type self-wringing mop, comprising:

A mop rod 7, and a mop rod pawl 6 is arranged at the lower part of the mop rod 7;

The rotating sleeve assembly is set on the bottom of the mop rod 7 and can slide up and down along the mop rod 7. The rotating sleeve assembly includes a rotating cylinder 1 sleeved on the mop rod 7 and a rotating cylinder sleeved on the rotating cylinder 1. Outer sleeve3. There is a gap between the rotary drum 1 and the mop rod 7, so that the rotary drum 1 can move along the mop rod 7 in the axial direction. Several claws 16 are provided at the bottom of the rotary drum 1, and the inner wall of the outer sleeve 3 is provided with outer sleeve pawls 13. , the outer wall of the rotary drum 1 is provided with a rotary drum outer ratchet 12, the outer sleeve pawl 13 is in constant mesh with the rotary drum outer ratchet 12, and the rotary drum inner ratchet 17 is arranged on the inner wall of the rotary drum 1 above the rotary drum outer ratchet 12;

The mop head 11, the bottom of the mop head 11 is fixed on the bottom of the mop rod 7, the top of the mop head 11 is provided with a button hole and arranged on the rotary drum 1, and fixed by the claw 16 so that the top of the mop head 11 and the rotary drum 1 rotate synchronously ;

When the rotating sleeve assembly is slid upwards to a certain position on the mop rod 7, the ratchet 17 in the rotating cylinder is engaged with the mop rod ratchet 6. Then we apply force to the pawl 13 of the outer sleeve to move the outer ratchet 12 of the rotary drum to drive the rotary drum 1 and the outer sleeve 3 to rotate synchronously. At the same time, the mop rod 7 remains stationary so that the rotary drum 1 is relatively Rod 7 also rotates.

During wringing work, the mop rod ratchet 6 is engaged with the ratchet 17 teeth in the rotary drum, and the ratchet 17 in the rotary drum slides relative to the mop rod ratchet 6 . Because the rotary drum outer ratchet 12 on the outside of the middle part of the rotary drum 1 is in constant engagement with the outer sleeve ratchet 13, during wringing work, the outer sleeve ratchet 13 drives the rotary drum outer ratchet 12 to rotate synchronously. The present invention can realize the function of avoiding getting hands in cold water and dirty water, automatically and easily wringing out the mop, and is suitable for places such as families, hotels, offices and the like.

In an optional embodiment of the present invention, the inner wall of the outer sleeve 3 is fixed with the outer sleeve pawl 13 by rivets, the outer wall is fixed with the first handle base 2 by the rivets, and the outer wall of the outer sleeve 3 is located above the first handle base 2 A card slot 9 is provided, and a toggle handle is connected to the first handle seat 2 through its own pin shaft;

During non-wringing work, turn the toggle handle 10 so that the toggle handle snaps into the draw-in groove 9 on the top of the outer sleeve 3 when it is not in use and is fixed, and is positioned parallel to the mop bar 7 . Wherein, the card slot 9 is fixed on the outer wall of the outer sleeve 3 by rivets.

When wringing out the work, turn the toggle handle to disengage from the draw-in groove 9, so that the torque applied to the rotary drum 1 is increased.

In an optional embodiment of the present invention, above the mop rod ratchet 6, a second handle base 4 is arranged on the mop rod 7 and fixed to the mop rod 7 by rivets, and the second handle base 4 is inserted with a mop rod handle 5. The mop rod handle 5 includes a pin shaft inserted in the second handle seat 4 and a grip handle hinged at the outer end of the pin shaft. The grip handle can rotate up and down centered on the fixed pin and form any angle with the mop rod 7. The handle is swung to a suitable position in the plane of the mop bar 7, and the moment applied thereon is increased.

Through the upper handle (mop handle 5) provided on the mop rod 7, and the toggle handle 10 provided at the middle part of the outer wall of the outer sleeve 3, the torque applied by the operating hand to it can be increased by the two handles.

When the toggle handle swings counterclockwise, the outer ratchet 12 of the rotary drum is pushed by the sleeve pawl 13, and the inner ratchet 17 of the rotary drum slides relative to the mop rod pawl 6, so that the mop is twisted into a spiral shape to realize the dehydration function; When the cylinder 3 swings back clockwise, the sleeve ratchet 13 slides over the tooth back of the external ratchet 12 of the rotary cylinder, and the internal ratchet 17 of the rotary cylinder and the mop rod pawl 6 are neither linked nor relatively slipped; The lower shaft shoulder of the rotary cylinder 1 is axially positioned with the upper nut 8 .

In the non-wringing working state, the mop rod handle 5 is in the axial parallel position with the mop rod 7; the toggle handle 10 is inserted into the slot 9 upwards, parallel to the mop rod 7; the rotary drum 1 is separated from the ratchet 6, and the rotary drum 1 is lowered To the lower end of the mop bar 7, the mop is unfolded to the ground, and the work of mopping the floor can be carried out.

When the mop needs to be cleaned and wrung out, put the mop into an ordinary bucket, lift it up and down and squeeze the mop head to clean; then lift the rotating cylinder 1 upward along the mop rod 7 axially, driving the outer sleeve 3 upward together, and the inside of the rotating cylinder The 17 teeth of the ratchet mesh with the pawl 6 of the mop rod; pull out the lower toggle handle 10 from the slot 9, the cleaner holds the upper handle 5 with one hand, and the lower toggle handle 10 with the other hand, and swings it counterclockwise. Toggle the handle 10, the outer ratchet 12 of the rotary cylinder is linked with the pawl 13 of the outer sleeve, and the inner teeth of the rotary cylinder 1 and the pawl 6 of the mop lever slide relative to each other, thereby driving the upper end of the mop head to rotate counterclockwise, twisting the mop into a spiral shape , to play a role in dehydration; when the toggle handle 10 is rotated to a certain angle and it is inconvenient for the operator to continue to function, turn the toggle handle 10 clockwise, and at the same time drive the outer sleeve 3 to swing back clockwise, and the outer sleeve pawl 13 Sliding over the outer ratchet teeth of the rotary drum, the rotary drum remains stationary, while the mop lever pawl 6 is engaged by the 17 teeth of the internal ratchet wheel of the rotary drum and is still relative to the rotary drum 1, and the outer sleeve 3 rotates with the lower handle 10 to the point where the operator does not move. It is convenient to continue to rotate; repeat the above actions until the mop is wrung to a suitable degree of dryness and wetness. Afterwards, the rotating cylinder 1 is pushed downwards, so that the ratchet wheel 17 in the rotating cylinder disengages from the engagement with the mop rod ratchet 6, and the mopping work can be continued.

The inner ratchet 17 processed on the upper part of the inner wall of the rotary drum engages with the mop rod pawl 6, so that the rotary drum 1 is positioned on the mop rod 7, and the mop is wrung out through one-way relative sliding movement.

In an optional embodiment of the present invention, the bottom of the rotary cylinder 1 is provided with an outwardly extending disk 21, the diameter of which is larger than the diameter of the button hole at the top of the mop head 11, and several claws are arranged on the outer edge of the disk 21. 16. The claw 16 structure under the rotary drum 1 can prevent the mop head 11 from being taken off from the rotary drum 1 or idling. Optionally, the rotating drum 1 is made of plastic, and the lower end has a claw-shaped protrusion, which not only can limit the position of the upper end of the mop along the direction of the mop rod 7, but also allow the upper end of the mop to rotate with the rotating drum 1 .

In an optional embodiment of the present invention, a lock ring is provided at the button hole on the top of the mop head 11 to fix the mop head, and a lock bar with an adjustable button hole size is arranged inside the lock ring, and an asymmetric ring is provided on one side of the lock bar. Saw-shaped teeth, one end is processed with a keyhole, the non-keyhole end is inserted into the keyhole, the toothed side of the lock bar faces inward, and the protruding end is pulled to tighten the buttonhole on the upper end of the mop. The assembly of the mop rod 7 (the assembled mop rod 7 and the rotating sleeve assembly) is drilled into the mop slit and passes through the mop button hole on the upper part of the mop head 11. , pull the lock bar, tighten the lock ring, the upper end of the mop head 11 can not move or rotate relative to the rotary cylinder 1, and the mop can work.

In an optional embodiment of the present invention, a thread 14 is provided on the top of the rotating cylinder 1, and a nut 8 is arranged on the thread, and a retaining ring 15 is arranged on the outer wall of the rotating cylinder 1 below the thread, and the The outer sleeve 3 is confined between the nut 8 and the retaining ring 15 . The position of the lower end of the outer sleeve 3 is limited by the retaining ring 15 of the rotary cylinder 1;

In an optional embodiment of the present invention, the mop rod 7 is made of a hollow metal tube, the bottom of the mop head 11 is provided with an internal thread assembly 19, and the bottom of the mop rod 7 is provided with an external thread assembly 18, and the internal thread assembly 19 is installed on the external thread Assembly 18, to fix the bottom of the mop head 11 on the bottom of the mop rod 7.

In an optional embodiment of the present invention, the outer ratchet 12 of the rotary drum is embedded in the recessed position 20 in the middle of the outer wall of the rotary drum 1 and positioned radially by rivets so that the pawl 13 of the outer sleeve and the outer ratchet 12 of the rotary drum are constantly meshed. The outer sleeve is set outside the rotary drum 1, the lower end is positioned by the shaft shoulder of the rotary drum 1, and the upper end is positioned by the nut 8 tightened on the upper part of the rotary drum 1; the outer ratchet 12 of the rotary drum and the pawl fixed on the outer sleeve 3 During constant meshing and wringing operation, the outer ratchet wheel 12 of the rotary cylinder is driven by the pawl 13 of the outer sleeve to rotate counterclockwise. The ratchet 12 slides, repeatedly swings the toggle handle 10, and performs the wringing operation.

In an optional embodiment of the present invention, a plastic ring is arranged on the lower part of the mop rod 7 and is fixed by a rivet, and a tongue-shaped mop rod pawl 6 is respectively arranged on both sides of the plastic ring, and the tongue-shaped mop The rod ratchet 6 engages with the ratchet 17 in the rotary drum to realize synchronous rotation with the mop rod and the rotary drum, as shown in FIG. 6 .

In an optional embodiment of the present invention, each claw 16 is a claw provided at the bottom of the rotary drum 1 and extending outward.

It should be noted that the clockwise and counterclockwise mentioned above is only an optional implementation mode. In practical applications, we can assemble the corresponding ratchet direction in the rotating sleeve assembly according to people's preferences, so as to realize counterclockwise Wring the mop clockwise or wring the mop clockwise, so I won't go into details here.

The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; Under the circumstances of the technical solution of the invention, many possible changes and modifications can be made to the technical solution of the present invention by using the methods and technical contents disclosed above, or be modified into equivalent embodiments with equivalent changes, which does not affect the essence of the present invention . Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention, which do not deviate from the technical solution of the present invention, still fall within the protection scope of the technical solution of the present invention.

Claims (10)

1. A double ratchet swing type self-wringing mop, characterized in that it comprises: A mop rod, and a mop rod ratchet is arranged at the middle and lower part of the mop rod; Rotating sleeve assembly, the rotating sleeve assembly is sleeved on the bottom of the mop rod and can slide up and down along the mop rod, the rotating sleeve assembly includes a rotary cylinder sleeved on the mop rod and a sleeve On the outer sleeve on the rotary drum, the bottom of the rotary drum is provided with several claws, the inner wall of the outer sleeve is provided with outer sleeve ratchets, and the rotary drum is provided with an outer ratchet of the rotary drum. The ratchet of the outer sleeve is constantly engaged with the outer ratchet of the rotary drum, and the inner ratchet of the rotary drum is arranged on the inner wall of the rotary drum and above the outer ratchet of the rotary drum; A mop head, the bottom of the mop head is fixed on the bottom end of the mop rod, the top of the mop head is provided with a button hole and is arranged on the rotary drum, and is fixed by the claw so that the top of the mop head is in contact with the mop rod. The rotary cylinder rotates synchronously; When the rotating sleeve assembly is slid up to a certain position on the mop rod, the inner ratchet of the rotary drum engages with the ratchet of the mop rod, and the outer sleeve ratchet moves the outer ratchet of the rotary drum to drive the The swivel drum rotates relative to the mop rod. 2. The double ratchet swing type self-wringing mop as claimed in claim 1, wherein the inner wall of the outer sleeve is fixed with the ratchet of the outer sleeve by a rivet, and the outer wall is fixed with a first handle seat by a rivet, so The outer wall of the outer sleeve is provided with a card slot above the first handle seat, and a toggle handle is connected to the first handle seat through its own pin shaft; When working without wringing, turn the toggle handle to snap into the card slot, and position it parallel to the mop rod. When wringing out the work, turn the toggle handle to get out of the draw-in slot, so that the torque applied to the rotary cylinder is increased. 3. The double-ratchet swing type self-wringing mop according to claim 1, wherein a second handle seat is arranged on the upper part of the mop rod, and a mop rod handle is inserted into the second handle seat, and the mop rod The handle includes a pin shaft inserted in the second handle seat and a grip handle hinged at the outer end of the pin shaft, and the grip handle can rotate up and down around the fixed pin. 4. The double ratchet swinging self-wringing mop according to claim 1, characterized in that, the bottom of the rotating cylinder is provided with an outwardly extending disk, and the diameter of the disk is larger than that of the button hole on the top of the mop head. diameter, and several claws are arranged on the outer edge of the disc. 5. The double-ratchet swing type self-wringing mop as claimed in claim 1, wherein a lock ring is arranged at the button hole on the top of the mop head, and a lock ring with adjustable button hole size is arranged in the lock ring. A toothed locking bar that is tightened to secure the top of the mop head to the bottom of the drum. 6. The double-ratchet swinging self-wringing mop as claimed in claim 1, wherein a section of thread is arranged on the top of the rotary cylinder, and a nut is arranged on the thread, and on the outer wall of the rotary cylinder below the thread, A retaining ring is provided, and the outer sleeve sleeved on the rotary cylinder is restricted between the nut and the retaining ring. 7. The double-ratchet swinging self-wringing mop according to claim 1, characterized in that, the bottom of the mop head is provided with an internal thread assembly, and the bottom of the mop rod is provided with an external thread assembly, and the external thread assembly is installed on the internally threaded component. 8. The double ratchet oscillating self-wringing mop according to claim 1, characterized in that, the outer ratchet of the rotary cylinder is embedded in a concave position in the middle of the outer wall of the rotary cylinder, and is positioned by a rivet. 9. The double ratchet swing type self-wringing mop according to claim 1, wherein a plastic ring is arranged at the middle and lower part of the mop rod, and a tongue-shaped mop rod is respectively arranged on both sides of the plastic ring. pawl. 10. The double-ratchet oscillating self-wringing mop according to claim 1, wherein each of the claws is a claw arranged at the bottom of the rotary drum and extending outward.