阅读说明：本技术 一种旋转阻尼器 (Rotary damper ) 是由 蔡燕辉 张妮龙 于 2020-06-11 设计创作，主要内容包括：本发明涉及一种旋转阻尼器,包括壳体、转轴、活塞及一芯轴盖,其中,所述的壳体与芯轴盖固定连接构成一端密闭一端开放的内部空间,所述的活塞可移动但不可转动地设于芯轴盖内侧的内部空间内,所述的转轴一端自开放端伸出壳体之外,一端内置于所述的内部空间内,并与所述的活塞螺旋连接,同时又与所述的活塞构成凸轮结构,所述的活塞将所述的内部空间分割为靠近芯轴盖的第一空间,及靠近转轴的第二空间,所述的转轴与壳体内壁之间设密封件,所述的活塞与壳体内壁之间设单向阀,所述的内部空间填充阻尼油。本发明结构紧凑简洁,装配工艺更简单。(The invention relates to a rotary damper, which comprises a shell, a rotating shaft, a piston and a mandrel cover, wherein the shell and the mandrel cover are fixedly connected to form an inner space with one closed end and one open end, the piston is movably but unrotatably arranged in the inner space at the inner side of the mandrel cover, one end of the rotating shaft extends out of the shell from the open end, the other end of the rotating shaft is arranged in the inner space and is spirally connected with the piston, meanwhile, the rotating shaft and the piston form a cam structure, the piston divides the inner space into a first space close to the mandrel cover and a second space close to the rotating shaft, a sealing element is arranged between the rotating shaft and the inner wall of the shell, a one-way valve is arranged between the piston and the inner wall of the shell, and damping oil is filled in the inner space. The invention has compact and simple structure and simpler assembly process.)

1. The utility model provides a rotary damper, its characterized in that includes casing, pivot, piston and dabber lid, wherein, casing and dabber lid fixed connection constitute the open inner space of the airtight one end of one end, the piston can move but locate in the inboard inner space of dabber lid non-rotatably, pivot one end stretch out outside the casing from open end, place in the inner space in one end, and with piston screwed connection, simultaneously again with the piston constitute cam structure, the piston will inner space split into the first space that is close to the dabber lid, and the second space that is close to the pivot, pivot and shells inner wall between establish the sealing member, piston and shells inner wall between establish the check valve, inner space fill damping oil.

2. A rotary damper according to claim 1, wherein said housing is circular.

3. A rotary damper according to claim 1, wherein said cam structure is formed between the surfaces of the shaft opposite the piston.

4. A rotary damper according to claim 1, wherein a screw is provided in the center of said shaft, one end of the center of said piston being in threaded engagement with said screw and the other end being in locked engagement with said spindle cover.

5. A rotary damper according to claim 4, wherein a screw post is provided centrally at the end opposite to the rotary shaft of the piston, the screw post is screw-coupled to the screw, a rotation stop hole post is formed at the end opposite to the screw post of the piston, and a slide guide rod fitted to the rotation stop hole post is formed inside the spindle cap.

6. A rotary damper according to claim 5, wherein the cam formation formed between the shaft and the piston has a clearance angle α, the helical post and the screw form a clearance angle β, and β > α.

7. A rotary damper as claimed in claim 6, wherein said slide guide rod is provided with a first oil passing groove and a second oil passing groove, an oil passing hole communicating with said rotation stop hole column is formed outside said piston spiral column, and said first oil passing groove and said second oil passing groove and said oil passing hole respectively form a first oil drainage passage and a second oil drainage passage.

8. A rotary damper according to claim 6, wherein the outer surface of the piston is formed with an annular groove slightly smaller than the inner diameter of the check valve, the annular groove includes an upper annular surface, a middle cylindrical surface and a lower annular surface, the distance between the upper annular surface and the lower annular surface is slightly larger than the upper and lower heights of the check valve, the lower annular surface is formed with oil passing holes uniformly distributed, and the gap between the check valve and the annular groove and the oil passing holes can jointly constitute a third oil drainage passage.

9. A rotary damper according to claim 8, wherein the outer surface of the piston has axially distributed grooves.

10. A rotary damper according to claim 1, wherein said housing open end forms a drop-off prevention flange, said housing is injection molded, and said housing and said spindle cover are ultrasonically welded.

Technical Field

The invention relates to the field of bathrooms, in particular to a rotary damper arranged on a toilet cover plate.

Background

The existing rotary damper not only meets the requirement of stable automatic production and can realize precise control, but also considers that the structure and the process of the product are not too complex, the cost is easy to be accepted by customers, and the invention is specially made in order to meet the requirements of operators and customers at the same time.

Disclosure of Invention

The invention aims to provide a rotary damper which is compact in structure and simpler in assembly process.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the utility model provides a rotary damper, includes casing, pivot, piston and a dabber lid, wherein, casing and dabber lid fixed connection constitute the open inner space of the airtight one end of one end, the piston can move but in the inboard inner space of dabber lid is located to the nonrotatable, pivot one end stretch out outside the casing from open end, place in one end in the inner space in, and with piston screwed connection, simultaneously again with the piston constitute the cam structure, the piston will inner space divide into the first space that is close to the dabber lid, and the second space that is close to the pivot, pivot and shells inner wall between establish the sealing member, piston and shells inner wall between establish the check valve, inner space fill damping oil.

By adopting the scheme, when the rotating shaft rotates clockwise (or anticlockwise), because the rotating shaft and the piston form a cam structure, and because the piston can be movably but non-rotatably arranged in the inner space, the rotating shaft and the piston interact with each other, so that the piston moves towards one side of the mandrel cover, at the moment, fluid in the first space flows towards the second space, the one-way valve is closed, and the damping is larger; when the rotating shaft rotates, the rotating shaft is in spiral connection with the piston, the piston moves towards one side of the rotating shaft, at the moment, fluid in the second space flows towards the first space, the one-way valve is opened, and damping is small. The damper with the structure has a simple and compact structure and a simpler assembly process. And secondly, the precision of the cam structure is easy to realize, and the precision required by the thread in the structure is low, so that compared with the similar products, the cam structure has low part precision requirement and is easy to open the die. Again, this configuration has less space requirements and is easier to miniaturize.

Preferably, the housing is circular. The damper with the structure has the advantages of less welding process requirement and higher production efficiency for oil injection.

Preferably, the cam structure is formed between surfaces of the rotary shaft opposite to the piston.

Preferably, the center of the rotating shaft is provided with a screw, one end of the center of the piston is in spiral fit with the screw, and the other end of the center of the piston is in rotation stopping fit with the mandrel cover.

Preferably, a screw column is arranged in the center of the end, opposite to the rotating shaft, of the piston, the screw column is in screw connection with the screw, a rotation stopping hole column is formed at the end, opposite to the screw column, of the piston, and a slide guide rod matched with the rotation stopping hole column is formed on the inner side of the mandrel cover. The rotating shaft with the structure is a main stressed part, and the large torque is realized easily by replacing metal materials due to simple structural characteristics.

The cam structure formed between the rotating shaft and the piston is provided with a section of hollow rotating angle alpha, a section of hollow rotating angle beta is formed between the spiral column and the screw rod, and beta is larger than alpha. When the rotating shaft moves in the idle rotation angle, the damping of the damper is negligible because the damping oil does not exchange flows in the first space and the second space.

Preferably, the sliding guide rod is provided with a first oil passing groove and a second oil passing groove, an oil passing hole communicated with the rotation stopping hole column is formed outside the piston spiral column, and the first oil passing groove and the second oil passing groove and the oil passing hole respectively form a first oil drainage channel and a second oil drainage channel. Here, the first oil drainage channel and the second oil drainage channel are both configured to accelerate the flow speed of the damping oil between the first space and the second space, and the response time of the damper can be further influenced.

Preferably, the outer surface of the piston forms an annular groove slightly smaller than the inner diameter of the check valve, the annular groove comprises an upper annular surface, a middle cylindrical surface and a lower annular surface, the distance between the upper annular surface and the lower annular surface is slightly larger than the vertical height of the check valve, the lower annular surface is provided with oil passing holes which are uniformly distributed, and a gap between the check valve and the annular groove and the oil passing holes can jointly form a third oil drainage channel. The third oil drainage passage can accelerate the flow speed of the damping oil between the first space and the second space, and the response time of the damper can be further influenced.

Preferably, the outer surface of the piston has axially distributed grooves. Where the groove may communicate with the third oil drainage passage.

Preferably, the open end port of the shell forms an anti-drop flange, the shell is formed by injection molding, and the shell and the mandrel cover are welded by ultrasonic waves. The damper cavity of such structure is compact, easy oiling, and the difficult bubble that forms can promote the yields of product.

Drawings

Fig. 1 is an exploded view of the overall structure of the present invention.

Fig. 2 is a perspective view of the rotating shaft of the present invention.

FIG. 3 is a sectional view of the rotating shaft of the present invention.

Fig. 4 is a first perspective view of the piston of the present invention.

Fig. 5 is a second perspective view of the piston of the present invention.

Fig. 6 is a three-dimensional structure diagram of the piston of the present invention.

Fig. 7 is a sectional structure of the piston of the present invention.

Fig. 8 is a perspective view of the mandrel cap of the present invention.

Fig. 9 is a perspective view of the housing of the present invention.

Fig. 10 is a sectional view showing the structure of the casing of the present invention.

Fig. 11 is a perspective view of the check valve of the present invention.

Fig. 12 is a longitudinal cross-sectional view of a first operating state of the present invention.

Fig. 13 is a state diagram of the product of the invention corresponding to fig. 12.

Fig. 14 is a transverse cross-sectional view of a first operating state of the present invention.

Fig. 15 is a longitudinal sectional view of a second operating state of the present invention.

Fig. 16 is a state diagram of the product of the invention corresponding to fig. 15.

Fig. 17 is a transverse cross-sectional view of a second operational state of the present invention.

Fig. 18 is a longitudinal sectional view of a third operating state of the present invention.

Fig. 19 is a longitudinal cross-sectional view of a fourth operating state of the present invention.

Fig. 20 is a longitudinal sectional view of a fifth operating state of the present invention.

Fig. 21 is a schematic view of the spindle of the present invention as a detachable member.

Detailed Description

The technical solution and the advantages of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 11, a rotary damper includes a housing 1, a rotary shaft 2, a piston 3, and a spindle cover 4.

Wherein, the shell 1 and the mandrel cover 4 are fixedly connected to form an inner space with one closed end and one open end, and the piston 3 is movably but non-rotatably arranged in the inner space of the mandrel cover 4.

One end of the rotating shaft 2 extends out of the shell 1 from the open end, and the other end is arranged in the inner space and is in spiral connection with the piston 3, and simultaneously forms a cam structure with the piston 3. Specifically, a cam structure is formed between the surfaces of the rotating shaft 2 opposite to the piston 3, the cam surface formed on the rotating shaft 2 is referred to as an upper cam 20, the cam formed on the piston 3 is referred to as a lower cam 30, and the upper cam 20 and the lower cam 30 form a free-running clearance K1 after being tightly fitted, which corresponds to a free-running angle a. The center of the rotating shaft 2 is provided with a screw 21.

The center of the opposite end of the piston 3 and the rotating shaft 2 is provided with a spiral column 31, one end of the center of the piston 3 is spirally matched with the screw 21 through the spiral column 31, the spiral column 31 and the screw 21 form an idle rotation gap K2 corresponding to an idle rotation angle beta, wherein beta is larger than alpha, and the other end of the idle rotation gap K2 forms a rotation stopping hole column 32. The inner side of the spindle cover 4 is formed with a slide guiding rod 41 which is fitted with the rotation stop hole column 32. The piston 3 divides the inner space into a first space A close to the mandrel cover 4 and a second space B close to the rotating shaft 2, a sealing element 5 is arranged between the rotating shaft 2 and the inner wall of the shell 1, and a one-way valve 6 is arranged between the piston 3 and the inner wall of the shell 1. The aforementioned inner space is filled with damping oil.

This attenuator of structure, pivot 2 are main atress spare, because structural feature is simple, and is easy through changing the metal material, realizes big moment of torsion, as shown in fig. 21, adopts the metal material with 2 shaft body parts 22 of pivot, and screw rod 21 adopts injection moulding, then pegs graft mutually through interference fit with screw rod 21 and shaft body part 22, has both satisfied 2 intensity of pivot and precision demands, has also satisfied cost control's demand simultaneously.

In a preferred embodiment, the housing 1 is circular, the open end of the housing 1 forms a retaining flange 11, and the housing 1 is injection molded and ultrasonically welded to the mandrel cover 4. It should be noted that the welding method may be other methods, such as spin welding, laser welding, etc., and the specific process method is not limited. The spindle cover 4 is fitted to the housing 1, and the slide guide rod 41 is slidably fitted to the piston 3, and has a D-shaped cross section, where the slide guide rod 41 may have any other non-circular cross-sectional shape, such as a polygon, a star, etc. The damper cavity with the structure has the advantages of compact structure, simpler welding characteristics, cylindrical shape, easy oil injection, difficult bubble generation and capability of improving the yield of products.

As a preferred embodiment, referring to fig. 12 to 17, the sliding guide rod 41 is provided with a first oil passing groove 411 and a second oil passing groove 412 (the number of the oil passing grooves may be increased as required, but is not limited to two), an oil passing hole 320 communicated with the rotation stopping hole column 32 is formed outside the spiral column 31 of the piston 3, the first oil passing groove 411 and the oil passing hole 320 form a first oil drainage channel L1, and the second oil passing groove 412 and the oil passing hole 320 form a second oil drainage channel L2, where the first oil drainage channel L1 and the second oil drainage channel L2 may both be configured to increase the flow speed of the damping oil between the first space a and the second space B, which may further affect the response time of the damper.

Referring to fig. 19, the outer surface of the piston 3 has axially distributed recesses 3021, an annular groove 300 slightly smaller than the inner diameter of the check valve 6 is radially formed, the annular groove 300 includes an upper annular surface 301, a middle annular surface 302 and a lower annular surface 303, the distance between the upper annular surface 301 and the lower annular surface 303 is slightly larger than the upper and lower heights of the check valve, oil passing holes 3030 are uniformly distributed on the lower annular surface 303, and a gap between the check valve 6 and the annular groove 300 and the oil passing holes 3030 may jointly form a third oil drainage passage L3. Here, the third oil drainage passage L3 communicates with the groove 3021, which can increase the flow speed of the damping oil between the first space a and the second space B, and can further affect the response time of the damper.

When the above-mentioned rotary damper is applied to the toilet lid, as shown in fig. 12 to 20, in the initial state (corresponding to the fully opened state of the toilet lid), there is no engagement between the rotary shaft 2 and the cam structure formed by the piston 3, i.e. there is a gap between the upper cam 20 and the lower cam 30, when the rotary shaft 2 is rotated clockwise by an angle a, the cam structure is engaged, i.e. the upper cam 20 and the lower cam 30 are in close fit, at this time, the spiral column 31 and the screw rod 21 are not engaged, during this process, the rotary shaft 2 only rotates relatively to the piston 3, but does not move relatively in the axial direction, and at this time, the damping is negligible. The rotating shaft 2 continues to rotate, the upper cam 20 and the lower cam 30 are separated up and down under the action of the cam structure, the piston 3 moves towards one end of the mandrel cover 4 relative to the rotating shaft 2, mud oil is prevented from flowing from a high-pressure cavity (namely, a first space A) to a low-pressure cavity (namely, a second space B) mainly through the first oil through groove 411, the second oil through groove 412 and the oil hole 320, the one-way valve is closed (namely, the one-way valve 6 is attached to the upper ring surface 301 of the annular groove 300), at the moment, the damping is small, and the toilet cover plate is closed downwards quickly; in the second half, as shown in fig. 18, the mud-blocking oil mainly flows from the high-pressure chamber (i.e., the first space a) to the low-pressure chamber (i.e., the second space B) through the first oil passing groove 411 and the oil passing hole 320, the check valve is closed, the opening between the upper cam 20 and the lower cam 30 is maximized, the damping is large, and the toilet lid is closed downward at a slow speed until the toilet lid is completely closed.

As shown in fig. 19, when the rotating shaft 2 is rotated in the reverse direction, after the rotating angle β, the spiral column 31 and the screw 21 are engaged in the reverse direction, in the process, the damping is negligible (corresponding to the state when the cover plate is just opened), the rotating shaft 2 is rotated continuously, the spiral column 31 and the screw 21 are rotated in the reverse direction in a matching manner, so that the piston 3 approaches to the rotating shaft 2, the mud-blocking oil flows from the high-pressure chamber (i.e., the first space a) to the low-pressure chamber (i.e., the second space B) through the first oil drainage channel L1, meanwhile, the check valve 6 is opened (i.e., the check valve 6 abuts against the lower annular surface 302 of the annular groove 300), the damping oil flows from the high-pressure chamber (i.e., the first space a) to the low-pressure chamber (i.e., the second space B); in the second half, the mud-blocking oil flows from the high-pressure cavity (namely the first space a) to the low-pressure cavity (namely the second space B) through the first oil drainage channel L1, the second oil drainage channel L2 and the third oil drainage channel L3 at the same time, the damping is minimum at the moment, and the cover plate can be opened rapidly until the initial state is returned (the cover plate is completely opened).

The damper with the structure has a compact structure and a simpler assembly process. And secondly, the precision of the cam structure is easy to realize, and the precision required by the thread in the structure is low, so that compared with the similar products, the cam structure has low part precision requirement and is easy to open the die. Again, this configuration has less space requirements and is easier to miniaturize.

The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications and equivalents made on the basis of the technical idea of the present invention fall within the protection scope of the present invention.