WO2018050083A1

WO2018050083A1 - Crankshaft automatic reset device with speed reduction or speed control function

Info

Publication number: WO2018050083A1
Application number: PCT/CN2017/101664
Authority: WO
Inventors: 叶任平
Original assignee: 上海品贵国际贸易有限公司
Priority date: 2016-09-19
Filing date: 2017-09-13
Publication date: 2018-03-22
Also published as: TWI665374B; CN106978951A; TW201814130A; CN106978951B

Abstract

Disclosed is a crankshaft automatic reset device with a speed reduction or speed control function, comprising a base (1), wherein the base (1) is internally provided with: a crankshaft (11); a propelling element (20) fixed on the crankshaft (11), with the propelling element (20) having a pushing trajectory; a sliding member (4), which has a function of receiving the pushing trajectory of the propelling element (20) so as to have a tendency to slide from a first position towards a second position along a displacement path; a reset device (3), which has a function of returning the sliding member (4) from the second position back to the first position; and at least a first traction portion (410) arranged on the sliding member (4); and same is provided with a propelling portion (510), at least one propelling stroke conversion element (60) coupled between the first traction portion (410) and the propelling portion (510), such that the amount of displacement of the propelling portion (510) with respect to the first traction portion (410) is amplified; and the propelling portion (510) is provided with a damping device (12), the damping device (12) being used for providing a resistance when the sliding member (4) is returned from the second position back to the first position, and having an emergency braking function. The speed of the automatic reset of the crankshaft (11) can be precisely adjusted by means of a height adjustment device (125) arranged on an inner side face having friction with the damping device (12).

Description

Automatic axle return device with deceleration or speed control

Technical field

Embodiments of the present invention relate to the field of mechanical control technologies, and in particular, to a crankshaft automatic homing device having a deceleration or speed control function.

Background technique

This section introduces the reader to the background art that may be associated with various aspects of the present invention, and is believed to provide the reader with useful background information to assist the reader in understanding the various aspects of the present invention. Therefore, it is to be understood that the description of this section is for the above purposes and is not an admission of the prior art.

At present, a door closer installed at the top of the door piece or a floor spring installed at the bottom of the door piece is mostly provided with a shaft that can be connected to the door piece in the base, and an oil that can control the rotation speed of the shaft. The pressing mechanism can interlock the hydraulic mechanism when the shaft rotates with the opening of the door, so that the hydraulic mechanism accumulates the preliminary pressure. When the door piece is released, the preparatory pressure of the hydraulic mechanism can resist the reversal rotation of the crankshaft, and the door piece is returned to the closed position as the shaft rotates slowly.

The hydraulic mechanism is generally provided with an adjustment valve capable of adjusting the opening amount of the oil return passage of the hydraulic oil inside the hydraulic mechanism, thereby adjusting the flow rate of the hydraulic oil to adjust the accumulation of the hydraulic oil to form the preliminary pressure. In turn, it is possible to control the speed at which the door is automatically reset.

However, the maximum angle at which the door piece is opened is between about 90 and an angle of approximately 180 degrees, so that the stroke of the shaft that can drive the shaft is not long, and the hydraulic mechanism must have a short stroke on the shaft. In the case where the hydraulic oil is accumulated enough to resist the re-rotation of the crankshaft, even if the adjustment valve of the hydraulic mechanism is slightly adjusted, the preparatory pressure accumulated by the hydraulic mechanism is greatly changed, resulting in difficulty in precision. The preparatory pressure is adjusted so that the door piece is prone to a situation in which the closing speed is too slow or too fast.

At present, the ground spring or door closer on the market has high pressure operation inside. If it is not strictly controlled by quality, it is easy to have oil leakage. After using for a period of time, its high pressure is also easy to damage the oil seal and oil leakage, affecting the service life. .

Summary of the invention

The technical problem to be solved by the embodiment of the present invention is how to control the problem that the door closing speed is too slow or too fast.

In view of the deficiencies in the prior art, the present invention provides a crankshaft automatic homing device having a deceleration or speed control function, including a base, and the base is provided with:

a crankshaft, a push member fixed to the crankshaft, the pusher member having a push trajectory;

a sliding member that receives the pushing trajectory of the pushing member and has a tendency to slide from the first position toward the second position along a displacement path;

a resetting device for providing the slider with a function of returning from the second position to the first position;

At least a first traction portion is disposed on the sliding member;

The utility model has a pushing portion and at least one pushing stroke conversion element coupled between the first traction portion and the pushing portion to enlarge the displacement amount of the pushing portion relative to the first traction portion, and also reduce the damping according to the gear ratio The resistance pressure required by the device;

The pushing portion is provided with a damping device for providing resistance when the slider is restored from the second position to the first position.

The damper device includes a rotating shaft disposed on the pushing device, and the rotating shaft is provided with a one-way wheel;

The direction of the rotation path of the one-way wheel is the same as the direction in which the second position is slid toward the first position.

The one-way wheel further includes a one-way bearing, and the one-way bearing is sleeved on the rotating shaft.

The damper device rubs against at least one inner side of the base or a bottom surface of the top cover to create a resistance.

Optionally, at least one set of height adjusting devices is disposed on the inner side surface of the friction device or the bottom surface of the top cover, and the height adjusting device adjusts the friction between the damping device and the inner side surface, To achieve speed control.

Optionally, the height adjustment device further includes a screw post fixed on the top cover and a screw cap matched with the screw post, and further includes a height adjusting portion, the screw cap fixing the height adjusting portion.

Optionally, the height adjustment device further includes a limit device for controlling the height of the height adjustment device, and the limit device reserves a space of a predetermined height for the height adjustment device to change the height.

Optionally, the height adjustment device is a plurality of groups, and the plurality of groups of height adjustment devices can control the homing speed of the crankshaft at different angles.

Optionally, the path of movement of the damper device is provided with a groove for eliminating or reducing the resistance.

Optionally, the damping device is configured to provide the same resistance or the same as the thrust of the pushing portion when the sliding plate is restored to the first position when the sliding member is restored to the first position to achieve an emergency. brake.

Optionally, the push stroke conversion element is configured to reduce the resistance pressure required by the damping device according to the gear ratio.

a second rack is disposed on the push stroke conversion element; wherein

The damping device is disposed on the second rack.

The second rack extends along the displacement path.

The first traction portion includes a first rack, and the first rack extends along the displacement path.

It can be seen from the above technical solution that the automatic shaft homing device with the deceleration or speed control function provided by the invention provides damping on the pushing portion for providing resistance when the sliding member is restored from the second position to the first position. The device structure is used to achieve the purpose of reducing the automatic homing speed of the above-mentioned automatic homing device of the crankshaft; the height adjustment device provided on the inner side surface rubbed with the damper device can adjust the displacement of the second rack per second to a small extent, thereby precision Adjust the speed at which the axis automatically homing. In the above prior art, the adjustment valve of the hydraulic mechanism is slightly adjusted, and the preliminary pressure accumulated by the hydraulic mechanism is greatly changed, which makes it difficult to precisely adjust the preliminary pressure, and the door piece is likely to be closed slowly. Or too fast, and the lack of oil and its impact on its service life. In addition, the present invention also has a new function that is not available in the prior art: emergency braking, which is not an improvement of the prior art; in the process of resetting the door, after the door is reset, the thrust of the pushing portion and the static friction of the damping device The resistance is the same or equivalent. At this time, if the door is reset, the door will stop or slowly reset, so that the user who is inconvenient to move or needs to monitor can pass slowly.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly made. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic exploded perspective view of an automatic homing device for a crankshaft having a deceleration function according to an embodiment of the present invention;

2a is a schematic top plan view of an automatic homing device for a crankshaft having a deceleration function according to an embodiment of the present invention;

2b is a schematic top plan view of an automatic homing device for a crankshaft having a deceleration function according to an embodiment of the present invention;

3 is a schematic longitudinal cross-sectional view of a crankshaft automatic homing device with a deceleration function according to an embodiment of the present invention;

4 is a schematic longitudinal cross-sectional view of a crankshaft automatic homing device with a deceleration function according to another embodiment of the present invention;

5 is a schematic cross-sectional view of a main portion of an automatic homing device for a crankshaft having a deceleration function according to another embodiment of the present invention;

6 is a schematic structural view of a damping device of a crankshaft automatic homing device with a deceleration or speed control function according to another embodiment of the present invention;

Figure 7 is a schematic cross-sectional view of the damper device of Figure 6 of the present invention;

FIG. 8 is a schematic diagram of a damping device of a crankshaft automatic homing device with a deceleration function according to an embodiment of the present invention; FIG.

FIG. 9 is a schematic diagram of a damping device of a crankshaft automatic homing device with a deceleration function according to another embodiment of the present invention; FIG.

10 is a schematic view showing a mounting position of a damper device of a crankshaft automatic homing device with a deceleration or speed control function according to an embodiment of the present invention;

11 is a cross-sectional view showing the structure of a height adjusting device for a crankshaft automatic homing device having a speed controlling function according to an embodiment of the present invention;

12 is a cross-sectional view showing the structure of a height adjusting device and a limiting device for a crankshaft automatic homing device having a speed controlling function according to an embodiment of the present invention;

13 is a cross-sectional view showing the structure of a height adjusting device for a crankshaft automatic homing device having a speed controlling function according to an embodiment of the present invention;

14 is an exploded perspective view of a height adjusting device and a limiting device of a crankshaft automatic homing device with a speed controlling function according to an embodiment of the present invention;

15 is a cross-sectional view showing the structure of a height adjusting device for a crankshaft automatic homing device having a speed control function according to an embodiment of the present invention;

16 is a schematic cross-sectional view showing the position of a groove for eliminating or reducing the resistance of the damper device of the automatic homing device for a crankshaft having a deceleration or speed control function according to an embodiment of the present invention;

17 is a schematic diagram of an emergency braking principle of an automatic homing device for a crankshaft having a deceleration or speed control function according to an embodiment of the present invention;

18 is a schematic diagram of an emergency braking angle of an automatic homing device for a crankshaft having a deceleration or speed control function according to an embodiment of the present invention;

Figure 19 is a graph showing the frictional force provided by the thrust and damping device of the pusher in the automatic homing device of the crankshaft having the deceleration function according to an embodiment of the present invention;

20 is a graph showing the frictional force provided by the thrust and damping device of the pusher in the automatic homing device of the crankshaft having the speed control function according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

As shown in FIG. 1 to FIG. 5, the present invention provides a shaft automatic returning device for speed control, comprising a base 1 having a shaft 11 and a pushing member fixed on the shaft 11 20, the pushing member 20 has a pushing trajectory; the sliding member 4 receives the pushing trajectory of the pushing member 20, and has a tendency to slide from the first position toward the second position along a displacement path; the resetting device 3, the sliding member 4 providing a function of restoring from the second position to the first position; at least the first traction portion 410 is disposed on the slider 4; and at least one push stroke conversion member 60 coupled between the first traction portion 410 and the pushing portion 510 The displacement amount of the pushing portion 510 relative to the first traction portion 410 is enlarged; the pressure required for the rotation of the mortgage shaft to be rotated is relatively reduced according to the gear ratio after the stroke conversion component 60 is pushed, so that the same load is In the case of the damper device, the resistance pressure required to be provided by the damper device is also relatively reduced; the urging portion 510 is provided with a damper device 12 for providing resistance when the slider is restored from the second position to the first position.

As shown in FIG. 3, FIG. 4, FIG. 6, and FIG. 7, the damper device 12 includes a rotating shaft 121 disposed on the pushing portion 510. The rotating shaft 121 is provided with a one-way wheel 122; the direction of the rotating path of the one-way wheel 122 is second. The direction in which the position slides toward the first position is the same.

As shown in FIG. 3, FIG. 4 and FIG. 7, the one-way wheel 122 further includes a one-way bearing 123, and the one-way bearing 123 is sleeved on the rotating shaft 121. The one-way wheel 122 is preferably a rubber wheel. It will of course be understood that the invention is not limited thereto, and that other unidirectional wheels 122 that may be made of a more functional or durable material may still implement the present invention.

As shown in FIG. 1 to FIG. 5, FIG. 8 and FIG. 9, the base 1 of the axle automatic homing device having the deceleration or speed control function further includes a top cover 10, and the damper device 12 can be rubbed against the bottom surface of the top cover 10. resistance. As shown in FIG. 10, it is of course understood that the damper device 12 can rub against other inner sides of the base 1 as well as to generate friction. As shown in FIG. 10, specifically, for example, the damper device 12 may rub against the bottom surface or the inner side surface of the susceptor 1 to generate a resistance. Of course, it is also possible that the damper device 12 simultaneously rubs against the bottom surface and the inner side surface of the top cover 10 of the susceptor 1 to generate a resistance or damper device 12 while rubbing against the bottom surface and the inner side surface of the susceptor 1 to generate resistance. In summary, the present invention can be achieved by the friction device 12 rubbing against at least one of the inner sides of the base 1 to create resistance.

A height adjusting device 125 is disposed on the inner side surface of the damper device rubbed against the top cover 10 as shown in FIGS. 11 to 14, and the height adjusting device 125 adjusts the frictional force between the damper device 12 and the inner side surface. The height adjustment device 125 can be set to one or more groups according to actual needs. Multiple sets of height adjustment devices 125 can control the homing speed of the crankshaft at different angles.

Specifically, as shown in FIG. 11 to FIG. 14, the height adjusting device 125 further includes a screw post 128 fixed on the top cover 10 and a screw cap 129 matched with the screw post, and further includes a height adjusting portion 130, and the screw cap 129 is fixed. Adjusting the pressure between the height adjusting portion 130 and the damper device by rotating the screw post 128 on the height adjusting portion, thereby adjusting the damper device Set the friction generated.

As shown in Figures 12 and 14, the height adjustment device further includes a limit device 126 that controls the height of the height adjustment device. The limiting device 126 reserves a space of a predetermined height for the height adjusting device 125 to change the height.

As shown in FIGS. 3 to 5, 8, and 9, in order to ensure normal operation in the final stage of the door closing, it is necessary to eliminate or reduce the friction provided by the damping device 12. In the present invention, the groove 100 for eliminating or reducing the resistance is provided on the path in which the damper device 12 moves. The width of the groove is greater than the width of the one-way wheel 122. The groove is provided with a predetermined length, which can be set according to actual conditions. As shown in FIG. 8 and FIG. 9, when the damper device is moved back into the groove 100, the friction between the unidirectional wheel 122 and the inner side surface is eliminated or reduced, thereby eliminating or reducing the friction provided by the damper device 12. the goal of.

As shown in FIG. 1, FIG. 4, FIG. 8, and FIG. 9, the pushing portion 510 extends and acts on the second rack 52 on the push stroke converting member; wherein the damping device 12 is disposed on the pushing portion 510 or the second rack 52. The restoring element is preferably an elastic element 3. In a more specific embodiment, the push element 20 comprises a set of cams 2 disposed on the crankshaft 11 such that the cam 2 rotates coaxially with the crankshaft 11 and utilizes the cam 2 The edge forms a pushing trajectory 103 of the push slider 4, so that the slider 4 can be slidably disposed between the cam 2 and the elastic member 3 along the displacement path 104; the slider 4 is slidably disposed on at least the sliding track member 70, the sliding track The component 70 can be a slide bar, a sliding seat or a pulley. The sliding member 4 is further provided with a guiding member 7 at least in series with the elastic member 3. The guiding member 7 is disposed between the cam 2 and the elastic member 3 and is guided. The piece 7 extends along the displacement path 104, and the slider 4 is slidably disposed on the guiding member 7. The first traction portion 410 includes a first rack 41 disposed on the slider 4, and the first rack 41 extends along the displacement path 104 along the displacement path 104 to extend the push portion 510 to act on the push stroke conversion member 60. The two racks 52 extend the second rack 52 along the displacement path 104.

As shown in FIGS. 1 to 5, the cam 2 is rotatable with the crankshaft 11, and drives the slider 4 along the push trajectory 103 to move toward the elastic member 3 to drive the first rack 41 via the gear set 6. Two racks 52.

As shown in FIGS. 1 to 5, the elastic member 3 is capable of elastically driving the slider 4 to move in the direction of the cam 2 to drive the push portion 510 backward with the first rack 41 via the gear set 6 and the second rack 52. In detail, the cam 2 drives the damper 12 forwardly via the first rack 41, the gear set 6 and the second rack 52 of the slider 4; the first rack 41 of the elastic member 3 via the slider 4 The gear set 6 and the second rack 52 drive the damping device 12 back in the opposite direction.

When the damper device 12 is driven to move forward, the one-way wheel rolls on the inner side surface due to the action of the one-way bearing, and there is no friction; but when the damper device receives the drive to reset backward, the one-way bearing will not be at this time. Rolling, the one-way wheel will not roll with the bottom or inner side, so friction with the bottom or inner side creates resistance.

If there is no height adjustment device between the damping device 12 and the inner side surface of the top cover or the inner side surface of the base, it can be used as a speed reduction device without the frictional force; if the inner side or base of the damping device 12 and the top cover A height adjusting device is arranged between the inner side surfaces, and the amount of compression between the bottom surface or the inner side surface of the top cover and the one-way wheel can be adjusted by the height adjusting device, thereby changing the pressure, and finally changing the friction force generated by the damping device 12, and setting different heights will correspond The different friction forces cause the damping device 12 to have a different rearward reset speed to make the device a speed control device.

The end face of the slider 4 is pivotally mounted with a roller 42 that can press the cam 2 of the push member 20 to reduce the friction between the slider 4 and the cam 2, so that the cam 2 and the slider 4 can be smoothly transmitted to each other. The cam 2 of the pushing member 20 is provided with a recess 21 for the roller 42 of the slider 4 to be pushed against, and a projection 22 for driving the slider 4 to move outward in the direction of the elastic member 3.

As shown in FIG. 2a, the crankshaft 11 can be set as the shaft or the shaft of the door closer, the floor spring or the sky spring by the above-mentioned component composition, and the door closer, the floor spring or the sky spring can be mounted on the top of the door piece or bottom. The elastic body 3 is capable of elastically driving the slider 4 to be displaced to the first position 101 in a normal state, so that the roller 42 of the slider 4 is pushed against the recess 21 of the cam 2. As shown in FIG. 2b, when the door piece is opened, the cam 2 and the crankshaft 11 can rotate the door piece, and the convex portion 22 of the cam 2 drives the sliding member 4 along the pushing trajectory 103 to move toward the elastic member 3, and Displace the slider 4 to the second position 102, so that the slider 4 compresses the elastic member 3, so that the elastic member 3 accumulates the elastic force; meanwhile, the first rack 41 moves toward the elastic member 3 along with the sliding member 4, so that the first tooth The strip 41 drives the second rack 52 via the gear set 6, thereby driving the one-way wheel 122 of the damper device 12 to roll forward without friction.

As shown in FIGS. 1 to 5, when the door piece is released, the elastic member 3 immediately releases the compressive elastic force, and the elastic driving slider 4 moves toward the cam 2, and the slider 4 is displaced to the first position 101, and the first The rack 41 moves in the direction of the cam 2 with the slider 4, so that the first rack 41 drives the second rack 52 via the gear set 6, thereby driving the one-way wheel 122 of the damper device 12 back with a frictional backward. Reset. The reset speed of the one-way wheel 122 is limited due to the effect of the frictional force. Therefore, the second rack 52 slowly moves with the one-way wheel 122, so that the second rack 52 slowly drives the first rack 41 via the gear set 6, so that the slider 4 slowly pushes against the cam along with the first rack 41. 2 and the shaft 11 is rotationally reset, forcing the door to return to the closed position as the shaft 11 is slowly rotated.

According to the above, the short-distance rotation stroke of the crankshaft 11 can be converted into the long-distance linear displacement stroke of the second rack 52 through the first rack 41 and the gear set 6, and the height adjustment can be set on the inner side surface rubbed against the damper device. In the case of the device, the long-distance linear displacement stroke of the second rack 52 and the one-way wheel 122 is obviously easier to adjust the displacement by the height adjusting device than the short-distance rotation stroke of the adjusting shaft 11; therefore, When the speed of the automatic return of the door piece is adjusted, the friction force of the one-way wheel 122 and the inner side surface can be directly controlled by the height adjusting device 122, and the displacement of the second rack 52 per second can be adjusted to a small extent, thereby finely adjusting the machine. The speed at which the axis 11 is automatically homed.

The automatic shaft homing device with the deceleration or speed control function provided by the invention can be used for a door closer, a floor spring or a sky spring, and the door closer, the floor spring or the sky spring can be mounted on the door piece. After the deceleration function is achieved by the structure, the invention still needs to achieve the purpose of speed control by components such as a cylinder or a cylinder, a piston, a flow adjustment device and the like. However, after the speed control function is achieved by the structure, the components such as the oil cylinder, the cylinder, the piston, the flow adjustment device, and the like can be omitted, thereby effectively reducing the length of the automatic axis homing device and reducing the automatic axis. The volume of the homing device also reduces manufacturing costs to a considerable extent.

As shown in Fig. 17, in addition, if the door is reset (holding the door for a few seconds by hand) after the door is reset (the door is reset to 50° to 40°), the elastic device is at this time. The thrust transmitted to the push portion is the same as or equivalent to the static friction resistance provided by the damper. If the two forces are the same, release the door and the door will stop resetting because the two forces cancel each other out. If the thrust is slightly larger than the static friction resistance provided by the damper, release the door and the door will slowly reset. Therefore, the automatic shaft homing device with the deceleration or speed control function provided by the invention realizes emergency braking. As shown in FIG. 17 to FIG. 18, specifically, when the door piece 110 is opened from 0° to 90°, the distance of the one-way wheel of the damper device rolling forward is X, and the thrust of the pushing portion is Y, damping. The friction provided by the device is W. When the door piece is reset from 90° to 0°, the thrust Y of the push portion decreases with different angles, but the friction force provided by the damper device is fixed until the one-way wheel has not entered the groove. As shown in Fig. 18 to Fig. 19, when the door piece is reset to 45°, the one-way wheel is also moved by X/2 with friction; at this time, the thrust of the pushing portion is about 0.6Y, and the pushing portion is The thrust provided by the thrust and the damping device is roughly equivalent, that is, 0.6Y≈W; at this time, the thrust of the pushing portion and the frictional force provided by the damping device cancel each other, and after the door piece is released, the door piece stops resetting or slowly resets. Emergency braking can be achieved at this time. Specifically, the present invention can be applied to a user who is inconvenient or in need of monitoring (for example, an elderly person, a child, or a disabled person), and a guardian or other enthusiastic person can use this function to facilitate the slow passage of the assisted person after the emergency stop of the door piece. After the passage is completed, simply pull the door open to 75° to 85° (the same as the opening angle of the door piece in normal use). At this time, the elastic device accumulates the thrust again, and then releases the door piece to resume normal operation. The automatic axis homing device of the deceleration or speed control function will be reset again.

The above data are theoretical values. In actual use, the user can stop the door piece at around 45° (50° to 40°), and the emergency brake function can also be realized. In addition, the door piece does not necessarily need to be completely stopped. Slow reset is required to achieve slow speed. In the present invention, the length and depth of the groove and the frictional force of the one-way wheel can be set according to actual needs.

In summary, the present invention provides a crankshaft automatic homing device with a deceleration or speed control function, by providing a damper device on the push portion that can be used to provide resistance when the slider is restored from the second position to the first position. The structure is used to achieve the purpose of reducing the automatic homing speed of the automatic homing device of the above-mentioned shaft; the height adjustment device provided on the inner side surface rubbed with the damper device can adjust the displacement amount of the second rack per second to be finely adjusted, thereby finely adjusting The speed at which the crankshaft automatically homing. In the above prior art, the adjustment valve of the hydraulic mechanism is slightly adjusted, and the preliminary pressure accumulated by the hydraulic mechanism is greatly changed, which makes it difficult to precisely adjust the preliminary pressure, and the door piece is likely to be closed slowly. Or too fast, and the lack of oil and its impact on its service life. In addition, the present invention also has a new function that is not available in the prior art: emergency braking, which is not an improvement of the prior art; in the process of resetting the door, after the door is reset, the thrust of the pushing portion and the static friction of the damping device The resistance is the same or equivalent. At this time, if the door is reset, the door will stop or slowly reset, so that the user who is inconvenient to move or needs to monitor can pass slowly.

It should be noted that, in this context, relational terms such as first and second are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply such entities or operations. There is any such actual relationship or order between them. Furthermore, the term "comprises" or "comprises" or "comprises" or any other variations thereof is intended to encompass a non-exclusive inclusion, such that a process, method, article, or device that comprises a plurality of elements includes not only those elements but also Other elements, or elements that are inherent to such a process, method, item, or device. An element that is defined by the phrase "comprising a ..." does not exclude the presence of additional equivalent elements in the process, method, item, or device that comprises the element. The orientation or positional relationship of the terms "upper", "lower" and the like is based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present invention. The description and the simplification of the present invention are not intended to be construed as a limitation or limitation. Unless specifically stated and limited, the terms "mounted," "connected," and "connected" are used in a broad sense, and may be, for example, a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, It can also be an electrical connection; it can be directly connected, or it can be connected indirectly through an intermediate medium, which can be the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In the description of the invention, numerous specific details are illustrated. However, it is understood that the embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of the description. Similarly, the various features of the invention are sometimes grouped together into a single embodiment in the above description of the exemplary embodiments of the invention in order to the , diagram, or description of it. However, the method disclosed is not to be interpreted as reflecting the intention that the claimed invention requires more features than those recited in the claims. Rather, as the following claims reflect, inventive aspects lie in less than all features of the single embodiments disclosed herein. Therefore, the claims following the specific embodiments are hereby explicitly incorporated into the embodiments, and each of the claims as a separate embodiment of the invention. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention is not limited to any single aspect, nor to any single embodiment, nor to any combination and/or permutation of these aspects and/or embodiments. Moreover, each aspect and/or embodiment of the invention may be used alone or in combination with one or more other aspects and/or embodiments thereof.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. The scope is intended to be included within the scope of the claims and the description of the invention.

Industrial applicability

The crankshaft automatic homing device with the deceleration or speed control function provided by the present invention achieves the above by providing a damper device structure on the pushing portion that can provide a resistance when the slider is restored from the second position to the first position. The automatic homing device of the crankshaft reduces the automatic homing speed; the height adjustment device provided on the inner side surface rubbed with the damper device can adjust the displacement of the second rack per second to a small extent, thereby precisely adjusting the automatic homing of the crankshaft speed. In the above prior art, the adjustment valve of the hydraulic mechanism is slightly adjusted, and the preliminary pressure accumulated by the hydraulic mechanism is greatly changed, which makes it difficult to precisely adjust the preliminary pressure, and the door piece is likely to be closed slowly. Or too fast, and the lack of oil and its impact on its service life. In addition, the present invention also has a new function that is not available in the prior art: emergency braking, which is not an improvement of the prior art; in the process of resetting the door, after the door is reset, the thrust of the pushing portion and the static friction of the damping device The resistance is the same or equivalent. At this time, if the door is reset, the door will stop or slowly reset, so that the user who is inconvenient to move or needs to monitor can pass slowly. It has high economic and social benefits and has industrial applicability. .

Claims

A crankshaft automatic homing device with a deceleration or speed control function, comprising: a base, wherein the base is provided with:

a crankshaft, a push member fixed to the crankshaft, the pusher member having a push trajectory;

a sliding member that receives the pushing trajectory of the pushing member and has a tendency to slide from the first position toward the second position along a displacement path;

a resetting device for providing the slider with a function of returning from the second position to the first position;

At least a first traction portion is disposed on the sliding member;

Having a pushing portion and at least one pushing stroke converting element coupled between the first pulling portion and the pushing portion to enlarge the displacement amount of the pushing portion relative to the first pulling portion;

The pushing portion is provided with a damping device for providing resistance when the slider is restored from the second position to the first position.
The crankshaft automatic homing device according to claim 1, wherein the damper device comprises a rotating shaft disposed on the pushing device, and the rotating shaft is provided with a one-way wheel;

The direction of the rotation path of the one-way wheel is the same as the direction in which the second position is slid toward the first position.
The crankshaft automatic homing device according to claim 2, wherein the one-way wheel further comprises a one-way bearing, and the one-way bearing is sleeved on the rotating shaft.
The crankshaft automatic homing device according to claim 1, wherein

The damper device rubs against at least one inner side of the base or a bottom surface of the top cover to create a resistance.
The automatic shaft homing device according to claim 4, wherein at least one set of height adjusting means is disposed on the inner side surface of the friction device or the bottom surface of the top cover, and the height adjusting device adjusts the Friction between the damper device and the inner side surface to achieve speed control.
The crankshaft automatic homing device according to claim 5, wherein the height adjusting device further comprises a screw post fixed on the top cover and a screw cap matched with the screw post, and further comprising a height adjusting portion The screw cap is fixed to the height adjusting portion.
The automatic shaft homing device according to claim 5, wherein the height adjusting device further comprises a limiting device for controlling the height of the height adjusting device, wherein the limiting device reserves a space of a predetermined height for The height adjustment device changes the height.
The crankshaft automatic homing device according to claim 5, wherein the height adjusting device is a plurality of groups, and the plurality of groups of height adjusting devices can control the homing speed of the crankshaft at different angles.
The crankshaft automatic homing device according to claim 1, wherein the path of movement of the damper device is provided with a groove for eliminating or reducing resistance.
A crankshaft automatic homing device according to any one of claims 1-9, characterized in that

The resistance provided by the damper when the slider is restored from the second position to the first position is the same or equivalent to the thrust of the push portion when the crankshaft is reset to 45° to achieve emergency braking.