Bidirectional anti-slip clutchable linear actuator and clutch method

Abstract

The present invention belongs to the technical field of electric rocking chairs, and specifically relates to a bidirectional anti-slip detachable linear actuator and a clutch method. The bidirectional anti-slip detachable linear actuator includes: a tapered sleeve, which is sleeved on the screw nut, and a groove that deepens toward the middle of the tapered sleeve is opened on one end wall of the tapered sleeve; a spring seat, which is connected to the end of the tapered sleeve with the groove, so as to push the ball to the deep end of the groove through the clutch spring; an outer tube, which is inserted into the tapered sleeve from the end with the groove to form a clutch channel that narrows toward the spring seat with the groove; an electromagnetic push rod kit, which is sleeved on the tapered sleeve and is suitable for pushing the ball axially toward the narrow end of the clutch channel through the push rod when power is turned on, so as to be stuck between the tapered sleeve and the outer tube. The clutch structure has a strong anti-slip ability against impacts from any direction.

Description

Technical Field

[0001] The invention belongs to the technical field of electric rocking chairs, and particularly relates to a bidirectional anti-slip detachable linear drive and a clutch method. Background Art

[0002] An electric rocking chair is a piece of furniture that soothes infants or makes it easier for them to fall asleep by rocking. Currently, most electric rocking chairs on the market are single-column, such as the electric rocking chair in the patent document with application number CN202020848340.0, in which the frame and the base are connected by a cylindrical transmission assembly. Since the single-column electric rocking chair drives the frame to rotate by a motor to achieve rocking, in order to obtain a large and slow swing amplitude, the cylindrical transmission assembly needs to be connected as close to one end of the frame as possible (if connected to the center of the frame, the swing amplitude will become small and rapid, which is not suitable for soothing). This results in that when switching to manual rocking mode, the force point of the swing when the user is facing the infant will be very close to the center of rotation, and swinging is more laborious. If you want to save effort, you have to go to the back of the electric rocking chair, which cannot be facing the infant. Therefore, the type of rocking chair suitable for switching between electric rocking and manual rocking is still the frame-type rocking chair in the patent document with application number CN201921948905.6. The seat is suspended in the frame, and the seat is rocked by the transmission component when it is rocked by electricity, and the user can easily rock the seat when it is rocked by hand.

[0003] In order to switch between electric and manual cranking, a transmission assembly capable of clutching is required. As a piece of furniture, electric rocking chairs need to control cost and weight, and are more suitable for a simple clutch structure. For example, the patent document with application number CN201120115703.0 uses a spring, roller, and a lever arm to clutch the inner main plate and the outer ring. However, this spring-type clutch structure still has certain defects. For example, the spring pushes the roller against the outer ring along the circumference. When the outer ring is not subjected to unexpected forces, it can clutch normally. However, when used in an electric rocking chair, there is a possibility that the outer ring will be accidentally hit when it extends during electric rocking. For impacts in the opposite direction of the spring extension, its anti-slip ability is strong, but for impacts in the same direction of the spring extension, its anti-slip ability is weak, and transmission failure is easy to occur. Summary of the Invention

[0004] The purpose of the present invention is to provide a bidirectional anti-slipping detachable linear actuator and a clutch method, so as to solve the technical problem that the spring-type clutch can only prevent slipping in one direction.

[0005] In order to solve the above technical problems, the present invention provides a bidirectional anti-slip and clutchable linear drive, comprising: a tapered sleeve, which is sleeved on the screw nut, and a groove deepening toward the middle of the tapered sleeve is opened on one end wall of the tapered sleeve; a spring seat, which is connected to the end of the tapered sleeve with the groove, so as to push the ball to the deep end of the groove through the clutch spring; an outer tube, which is inserted into the tapered sleeve from the end with the groove to form a clutch channel narrowing toward the spring seat with the groove; an electromagnetic push rod kit, which is sleeved on the tapered sleeve and is suitable for pushing the ball axially toward the narrow end of the clutch channel through the push rod when power is turned on, so as to be stuck between the tapered sleeve and the outer tube.

[0006] Furthermore, the screw nut is sleeved on the screw and has a limiting groove.

[0007] Furthermore, the middle portion of the tapered sleeve protrudes to form an outer tube seat; the other end of the spring seat protrudes to form a hand-cranked limit seat.

[0008] Furthermore, the exposed end of the lead screw nut protrudes to form an electromagnetic kit seat; the electromagnetic push rod kit includes: a coil seat body, which is sleeved on the tapered sleeve between the outer tube seat and the electromagnetic kit seat, and is provided with a push rod through hole and an armature spring accommodating hole; an armature, which is sleeved on the tapered sleeve between the coil seat body and the electromagnetic kit seat; an armature spring, which is arranged in the armature spring accommodating hole; a push rod, which is clamped in the armature and extends into the groove through the push rod through hole; a coil, which is wound on the coil seat body and is suitable for causing the armature to overcome the elastic force of the armature spring and move toward the coil seat body when power is applied, so as to drive the push rod to push the ball axially toward the narrow end of the clutch channel.

[0009] On the other hand, the present invention also provides a bidirectional anti-disengagement method, comprising: the bidirectional anti-disengagement detachable linear drive as described above; energizing the electromagnetic push rod kit mounted on the tapered sleeve, and pushing the ball axially toward the narrow end of the clutch channel through the push rod, so that the ball is stuck between the tapered sleeve and the outer tube.

[0010] The beneficial effect of the present invention is that the present invention improves the spring-type clutch structure, and a narrowed clutch channel can be formed with the outer tube through the groove on the tapered sleeve. After the electromagnetic push rod kit is energized, the ball can be pushed axially to the narrow end of the clutch channel through the push rod, and is clamped between the tapered sleeve and the outer tube, so that the two are engaged. The screw nut can drive the outer tube to reciprocate, and then the electric rocking chair seat frame connected to the outer tube can be reciprocated to achieve electric rocking. Moreover, since the ball is axially clamped into the narrow end of the clutch channel, as long as the impact force does not exceed the suction force of the electromagnetic push rod kit, the tapered sleeve and the outer tube can be prevented from being disengaged in any direction of impact to the outer tube. Therefore, the clutch structure has a strong anti-detachment ability against impact in any direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the prior art descriptions. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Figure 1 This is a cross-sectional view of the bidirectional anti-slip detachable linear actuator of the present invention. Figure 1 ;

[0013] Figure 2 This is an exploded view of the bidirectional anti-slip detachable linear actuator of the present invention;

[0014] Figure 3 This is a cross-sectional view of the bidirectional anti-slip detachable linear actuator of the present invention. Figure 2 ;

[0015] Figure 4 This is a cross-sectional view of the bidirectional anti-slip detachable linear actuator of the present invention. Figure 3 ;

[0016] In the picture:

[0017] Tapered sleeve 100, groove 110, outer tube seat 120;

[0018] Screw nut 200, limiting groove 210, electromagnetic kit seat 220;

[0019] Spring seat 300, clutch spring 310, hand-crank limit seat 320;

[0020] Ball 400;

[0021] Outer tube 500;

[0022] clutch channel 600;

[0023] Electromagnetic ejector assembly 700, ejector 710, coil base 720, ejector through hole 721, armature spring receiving hole 722, armature 730, armature spring 740, coil 750;

[0024] Screw 800. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments that can be realized by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Example

[0027] like Figure 1 and Figure 2 As shown, the present invention provides a bidirectional anti-slip and clutchable linear actuator, comprising: a tapered sleeve 100, which is sleeved on a lead screw nut 200, and a groove 110 is formed on one end wall of the tapered sleeve 100, which deepens toward the middle of the tapered sleeve 100; a spring seat 300, which is connected to the end of the tapered sleeve 100 with the groove 110, so as to push the ball 400 to the deep end of the groove 110 through the clutch spring 310; an outer tube 500, which is inserted into the tapered sleeve 100 from the end with the groove 110, so as to form a clutch channel 600 narrowing toward the spring seat 300 with the groove 110; an electromagnetic push rod kit 700, which is sleeved on the tapered sleeve 100 and is suitable for pushing the ball 400 axially toward the narrow end of the clutch channel 600 through the push rod 710 when power is applied, so as to be clamped between the tapered sleeve 100 and the outer tube 500. In this embodiment, the spring seat 300 and the tapered sleeve 100 can be connected by bolts, and the tapered sleeve 100 is threadedly matched with the screw nut 200.

[0028] The present invention can form a narrowed clutch channel 600 with the outer tube 500 through the groove 110 on the tapered sleeve 100. After the electromagnetic push rod kit 700 is energized, the push rod 710 can push the ball 400 axially toward the narrow end of the clutch channel 600 and clamp it between the tapered sleeve 100 and the outer tube 500, so that the two are engaged. The screw nut 200 can drive the outer tube 500 to reciprocate, thereby causing the electric rocking chair seat frame connected to the outer tube 500 to reciprocate, thereby realizing electric rocking. Moreover, since the ball 400 is axially clamped into the narrow end of the clutch channel 600, as long as the impact force does not exceed the suction force of the electromagnetic push rod kit 700, the tapered sleeve 100 and the outer tube 500 will not be disengaged when the outer tube 500 is impacted in any direction. Therefore, this clutch structure has a strong anti-detachment ability against impacts in any direction.

[0029] like Figure 1 As shown, the screw nut 200 is sleeved on the screw 800 and has a limiting groove 210. The limiting groove 210 of the screw nut 200 is used to connect with a constraint such as a straight rod. After the screw 800 is driven by the motor, the screw nut 200 constrained thereon can make corresponding forward and backward movements according to the rotation direction of the screw 800. The tapered sleeve 100 sleeved on the screw nut 200 and the outer tube 500 engaged with the tapered sleeve 100 can move synchronously with it, thereby achieving the clutch of the linear reciprocating motion and also ensuring strong anti-slip ability against impacts from any direction as mentioned above.

[0030] like Figure 2 and Figure 3As shown, the middle part of the tapered sleeve 100 protrudes to form an outer tube seat 120; the other end of the spring seat 300 protrudes to form a hand-cranked limit seat 320. This linear actuator is suitable for horizontal or vertical installation on the base, and can achieve reciprocating motion of the electric rocking chair seat frame through the outer tube 500. Figure 3 When it is necessary to switch to the manual cranking mode, the motor can first control the rotation of the screw rod 800 to move the screw nut 200 to the end of the screw rod 800 ( Figure 3 100 , and the outer tube 500 is in a state of engagement and is inserted into the screw rod 800 . After that, the electromagnetic push rod kit 700 is powered off, the push rod 710 is retracted, and the ball 400 is reset to the deep part of the groove 110 . Since the gap between the outer tube 500 and the tapered sleeve 100 in the deep part of the groove 110 becomes larger, the ball 400 will not be stuck by the outer tube 500 and the tapered sleeve 100 . Therefore, the outer tube 500 is disengaged from the tapered sleeve 100 and the hand-cranking mode can be entered. When hand-cranking, the hand-cranking limit seat 320 can limit and guide the outer tube 500 to ensure that the outer tube 500 can still make a linear motion when hand-cranking, so that the user can make a more stable swing and soothe the infant. In this embodiment, the hand-crank limiter 320 is annular in shape, with a diameter slightly smaller than the inner diameter of the outer tube 500, to facilitate sliding of the outer tube 500 during manual cranking. It should be noted that the length of the hand-crank limiter 320 can be adjusted according to the specifications of the electric rocking chair, and the length in the figure is for reference only. The outer tube seat 120 prevents the outer tube 500 from colliding with the electromagnetic push rod assembly 700.

[0031] like Figure 2 and Figure 3 As shown, the exposed end of the lead screw nut 200 protrudes to form an electromagnetic kit seat 220; the electromagnetic ejector kit 700 may include: a coil seat body 720, which is sleeved on the tapered sleeve 100 between the outer tube seat 120 and the electromagnetic kit seat 220, and has an ejector through hole 721 and an armature spring accommodating hole 722; an armature 730, which is sleeved on the tapered sleeve 100 between the coil seat body 720 and the electromagnetic kit seat 220; Figure 4 The armature spring 740 is disposed in the armature spring receiving hole 722; the push rod 710 is engaged with the armature 730 and extends into the groove 110 through the push rod through hole 721; the coil 750 is wound around the coil base 720 and is adapted to enable the armature 730 to overcome the elastic force of the armature spring 740 and move toward the coil base 720 when power is applied, thereby driving the push rod 710 to push the ball 400 axially toward the narrow end of the clutch channel 600. Figure 2 In this embodiment, four push rod through holes 721 and four armature spring accommodating holes 722 are evenly arranged along the circumference of the coil base body 720, and a corresponding number of push rods 710, grooves 110, clutch springs 310, and balls 400 are provided.

[0032] In this embodiment, a bidirectional anti-disengagement method is also provided, including: the bidirectional anti-disengagement detachable linear drive as described above; energizing the electromagnetic push rod kit 700 mounted on the tapered sleeve 100, and pushing the ball 400 axially toward the narrow end of the clutch channel 600 through the push rod 710, so that the ball 400 is stuck between the tapered sleeve 100 and the outer tube 500.

[0033] The bidirectional anti-disengagement method is described above and will not be repeated here.

[0034] The present invention improves the spring-type clutch structure. The groove on the tapered sleeve can form a narrowed clutch channel with the outer tube. After the electromagnetic push rod kit is energized, the ball can be pushed axially to the narrow end of the clutch channel through the push rod, and is clamped between the tapered sleeve and the outer tube, so that the two are engaged. The screw nut can drive the outer tube to reciprocate, and then the electric rocking chair seat frame connected to the outer tube can be reciprocated to achieve electric rocking. Moreover, since the ball is axially clamped into the narrow end of the clutch channel, as long as the impact force does not exceed the suction force of the electromagnetic push rod kit, the tapered sleeve and the outer tube can be prevented from being disengaged in any direction of impact to the outer tube. Therefore, the clutch structure has a strong anti-detachment ability against impacts in any direction.

[0035] In the embodiments provided herein, it should be understood that the disclosed systems and devices may be implemented in other ways. The embodiments described above are merely illustrative. For example, the division of the mechanism described is merely a logical functional division, and actual implementation may employ other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not implemented.

[0036] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0037] With the above-described preferred embodiments of the present invention as a guide, those skilled in the art will readily be able to make various changes and modifications without departing from the technical spirit of the present invention. The technical scope of the present invention is not limited to the contents of the specification but must be determined in accordance with the scope of the claims.

Claims

1. A bidirectional anti-disengagement and detachable linear actuator, characterized in that: include: A tapered sleeve (100) is sleeved on the screw nut (200), and a groove (110) is formed on one end wall of the tapered sleeve (100) and deepens toward the middle of the tapered sleeve (100); A spring seat (300) is connected to one end of the tapered sleeve (100) having a groove (110) so as to push the ball (400) to the depth of the groove (110) through a clutch spring (310); An outer tube (500) is inserted into the tapered sleeve (100) from one end having the groove (110) to form a clutch channel (600) narrowing toward the spring seat (300) with the groove (110); an electromagnetic push rod assembly (700) which is sleeved on the tapered sleeve (100) and is adapted to push the ball (400) axially toward the narrow end of the clutch channel (600) via the push rod (710) when power is supplied, so as to be clamped between the tapered sleeve (100) and the outer tube (500); The middle portion of the tapered sleeve (100) protrudes to form an outer tube seat (120); The exposed end of the screw nut (200) protrudes to form an electromagnetic kit seat (220); The electromagnetic ejector kit (700) comprises: A coil seat body (720) is sleeved on the tapered sleeve (100) between the outer tube seat (120) and the electromagnetic kit seat (220), and is provided with a push rod through hole (721) and an armature spring receiving hole (722); An armature (730) is sleeved on a tapered sleeve (100) between the coil seat body (720) and the electromagnetic assembly seat (220); an armature spring (740) disposed in the armature spring receiving hole (722); A push rod (710) is engaged in the armature (730) and extends into the groove (110) through the push rod through hole (721); The coil (750) is wound on the coil base (720) and is adapted to enable the armature (730) to overcome the elastic force of the armature spring (740) and move toward the coil base (720) when power is supplied, thereby driving the push rod (710) to push the ball (400) axially toward the narrow end of the clutch channel (600).

2. The bidirectional anti-disengagement and detachable linear actuator according to claim 1, characterized in that: The screw nut (200) is sleeved on the screw (800) and has a limiting slot (210).

3. The bidirectional anti-disengagement and detachable linear actuator according to claim 2, characterized in that: The other end of the spring seat (300) protrudes to form a hand-cranked limiting seat (320).

4. A two-way anti-disengagement method, characterized in that: include: The bidirectional anti-slip detachable linear actuator according to any one of claims 1 to 3; The electromagnetic push rod assembly (700) sleeved on the tapered sleeve (100) is energized, and the ball (400) is pushed axially toward the narrow end of the clutch channel (600) via the push rod (710), so that the ball (400) is clamped between the tapered sleeve (100) and the outer tube (500).

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