阅读说明：本技术 具备限位功能的自动锁紧释放机构以及锁紧释放操作方法 (Automatic locking and releasing mechanism with limiting function and locking and releasing operation method ) 是由 李宗峰 马越峤 冯振华 张永康 卓志钦 于 2020-05-25 设计创作，主要内容包括：本发明提供一种具备限位功能的自动锁紧释放机构以及锁紧释放操作方法,机构包括：步进电机、丝杠、锁紧导向杆、导向套筒、锁紧端盖和锁紧被动端；所述锁紧被动端的底面为锁紧底面为平面,在所述锁紧被动端的锁紧底面中心开设锥形孔,所述锁紧被动端的锁紧底面通过所述锥形孔,套在位于所述锁紧导向杆的外面；所述锁紧端盖的外周面为与所述锥形孔配合的锥面；所述锁紧被动端用于与隔振对象的底面固定。优点为：本发明提供的具备限位功能的自动锁紧释放机构,构型简单,加工方便,可重复使用,机构运动安全可靠,锁紧力适中,尺寸重量、功耗和占用资源均很小,安装使用便捷灵活,非常适合应于到微重力主动隔振技术中在轨锁紧和释放领域中。(The invention provides an automatic locking and releasing mechanism with a limiting function and a locking and releasing operation method, wherein the mechanism comprises: the locking device comprises a stepping motor, a lead screw, a locking guide rod, a guide sleeve, a locking end cover and a locking passive end; the bottom surface of the locking passive end is a plane, a tapered hole is formed in the center of the locking bottom surface of the locking passive end, and the locking bottom surface of the locking passive end is sleeved outside the locking guide rod through the tapered hole; the outer peripheral surface of the locking end cover is a conical surface matched with the conical hole; and the locking passive end is used for being fixed with the bottom surface of the vibration isolation object. Has the advantages that: the automatic locking and releasing mechanism with the limiting function provided by the invention has the advantages of simple structure, convenience in processing, reusability, safety and reliability in mechanism movement, moderate locking force, small size, weight, power consumption and occupied resources, convenience and flexibility in installation and use, and is very suitable for the field of on-rail locking and releasing in the microgravity active vibration isolation technology.)

1. An automatic locking and releasing mechanism with a limiting function is characterized by comprising: the device comprises a stepping motor (1), a lead screw (2), a locking guide rod (3), a guide sleeve (4), a locking end cover (5) and a locking passive end (6);

the bottom of the stepping motor (1) is fixed on a base (11) of the vibration isolation device; the top of the stepping motor (1) is fixedly provided with the guide sleeve (4), the bottom end of the locking guide rod (3) is slidably arranged in the guide sleeve (4), the top end of the locking guide rod (3) penetrates through the guide sleeve (4) and extends to the upper part of the guide sleeve (4), and the top end of the locking guide rod (3) is fixedly provided with the locking end cover (5); the output end of the stepping motor (1) is provided with the lead screw (2), the lead screw (2) is positioned in the center of the interior of the locking guide rod (3), and the lead screw (2) and the locking guide rod (3) form a lead screw nut pair structure, so that when the stepping motor (1) rotates, the lead screw (2) drives the locking guide rod (3) to move up and down, and the locking end cover (5) is driven to move up and down;

the bottom surface of the locking passive end (6) is a locking bottom surface (6B) which is a plane, a tapered hole (6A) is formed in the center of the locking bottom surface (6B) of the locking passive end (6), the locking bottom surface (6B) of the locking passive end (6) is sleeved outside the locking guide rod (3) through the tapered hole (6A), and meanwhile, the locking bottom surface (6B) of the locking passive end (6) is positioned above the guide sleeve (4) and below the locking end cover (5); the peripheral surface of the locking end cover (5) is a conical surface (5A) matched with the conical hole (6A); the locking passive end (6) is used for being fixed with the bottom surface of the vibration isolation object.

2. The automatic locking and releasing mechanism with limit function according to claim 1 is characterized in that a micro travel switch (7) is fixedly installed outside the guide sleeve (4); the micro travel switch (7) is fixedly arranged outside the guide sleeve (4) through a first screw (8).

3. The automatic locking and releasing mechanism with limiting function according to claim 1 is characterized in that the locking end cover (5) and the top end of the locking guide rod (3) are fixed by a second screw (9).

4. The automatic locking and releasing mechanism with limiting function according to claim 1 is characterized in that the stepping motor (1) and the guiding sleeve (4) are fixed by a third screw (10).

5. The automatic locking and releasing mechanism with limit function according to claim 1, wherein the tapered hole (6A) is a tapered hole with gradually reduced diameter from top to bottom; the outer peripheral surface of the locking end cover (5) is the outer peripheral surface with the diameter gradually reduced from top to bottom.

6. A lock release operation method of an automatic lock release mechanism with a limit function according to any one of claims 1 to 5, comprising the steps of:

step 1, after an automatic locking and releasing mechanism with a limiting function is assembled, fixing the bottom of a stepping motor (1) with a base (11) of an vibration isolation device, and fixing a locking passive end (6) with the bottom surface of a vibration isolation object;

step 2, when the locking and releasing mechanism needs to be in a locking state, the stepping motor (1) is controlled, the stepping motor (1) drives the locking end cover (5) to move downwards until the locking end cover moves to a locking action stroke, namely the locking and releasing mechanism is considered to be locked in place, the stepping motor (1) stops rotating, and a locking task is completed; in the locking process, when the stepping motor (1) drives the locking end cover (5) to move downwards, the locking end cover (5) and the locking driven end (6) are in a taper hole matching relationship, so that the locking end cover (5) pushes the locking driven end (6) to move downwards, when the locking is in place, the locking bottom surface (6B) of the locking driven end (6) is clamped between the locking end cover (5) and the top plane of the guide sleeve (4), and meanwhile, due to the taper hole matching relationship of the locking end cover (5) and the locking driven end (6), the locking driven end (6) is clamped and fixed at a geometric center position, and the locking limiting effect on the locking driven end (6) is realized;

step 3, when the locking and releasing mechanism needs to be in an unlocking state, the stepping motor (1) is reversely controlled, so that the stepping motor (1) drives the locking end cover (5) to move upwards, and the locking end cover (5) is further far away from the locking bottom surface (6B) of the locking passive end (6) until the locking end cover moves to an unlocking action stroke; the stepping motor (1) stops rotating, and the unlocking task is completed; at this moment, the spatial distance between the plane of the top of the guide sleeve (4) and the bottom surface of the locking end cover (5) is the distance of the vertical movement up and down of the locking bottom surface (6B) of the locking passive end (6), in addition, because the locking bottom surface (6B) of the locking passive end (6) is sleeved outside the locking guide rod (3), the vertical movement of the locking bottom surface (6B) of the locking passive end (6) is limited and restricted by the locking guide rod (3), namely: the locking bottom surface (6B) of the locking passive end (6) can move in the vertical direction in a constraint space formed by the locking guide rod (3) and the main locking end cover (5) of the guide sleeve (4), and has a certain vertical movement range, so that the vibration isolation object has a certain floating movement space; the locking end cover (5) realizes the top limiting function.

7. The locking and releasing operation method of an automatic locking and releasing mechanism with a limiting function according to claim 6, characterized in that after sudden power failure occurs, the micro travel switch (7) is used as the basis for judging the locking in-place action, namely: when the trigger instruction of the micro travel switch (7) is detected, the locking and releasing mechanism is considered to be locked in place.

Technical Field

The invention belongs to the technical field of mechanical engineering, and particularly relates to an automatic locking and releasing mechanism with a limiting function and a locking and releasing operation method.

Background

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides an automatic locking and releasing mechanism with a limiting function and a locking and releasing operation method, which can effectively solve the problems.

The technical scheme adopted by the invention is as follows:

the invention provides an automatic locking and releasing mechanism with a limiting function, which comprises: the device comprises a stepping motor (1), a lead screw (2), a locking guide rod (3), a guide sleeve (4), a locking end cover (5) and a locking passive end (6);

the bottom of the stepping motor (1) is fixed on a base (11) of the vibration isolation device; the top of the stepping motor (1) is fixedly provided with the guide sleeve (4), the bottom end of the locking guide rod (3) is slidably arranged in the guide sleeve (4), the top end of the locking guide rod (3) penetrates through the guide sleeve (4) and extends to the upper part of the guide sleeve (4), and the top end of the locking guide rod (3) is fixedly provided with the locking end cover (5); the output end of the stepping motor (1) is provided with the lead screw (2), the lead screw (2) is positioned in the center of the interior of the locking guide rod (3), and the lead screw (2) and the locking guide rod (3) form a lead screw nut pair structure, so that when the stepping motor (1) rotates, the lead screw (2) drives the locking guide rod (3) to move up and down, and the locking end cover (5) is driven to move up and down;

the bottom surface of the locking passive end (6) is a locking bottom surface (6B) which is a plane, a tapered hole (6A) is formed in the center of the locking bottom surface (6B) of the locking passive end (6), the locking bottom surface (6B) of the locking passive end (6) is sleeved outside the locking guide rod (3) through the tapered hole (6A), and meanwhile, the locking bottom surface (6B) of the locking passive end (6) is positioned above the guide sleeve (4) and below the locking end cover (5); the peripheral surface of the locking end cover (5) is a conical surface (5A) matched with the conical hole (6A); the locking passive end (6) is used for being fixed with the bottom surface of the vibration isolation object.

Preferably, a micro travel switch (7) is fixedly arranged outside the guide sleeve (4); the micro travel switch (7) is fixedly arranged outside the guide sleeve (4) through a first screw (8).

Preferably, the locking end cover (5) and the top end of the locking guide rod (3) are fixed through a second screw (9).

Preferably, the stepping motor (1) and the guide sleeve (4) are fixed through a third screw (10).

Preferably, the tapered hole (6A) is a tapered hole with gradually reduced hole diameter from top to bottom; the outer peripheral surface of the locking end cover (5) is the outer peripheral surface with the diameter gradually reduced from top to bottom.

The invention also provides a locking and releasing operation method of the automatic locking and releasing mechanism with the limiting function, which comprises the following steps:

step 1, after an automatic locking and releasing mechanism with a limiting function is assembled, fixing the bottom of a stepping motor (1) with a base (11) of an vibration isolation device, and fixing a locking passive end (6) with the bottom surface of a vibration isolation object;

step 2, when the locking and releasing mechanism needs to be in a locking state, the stepping motor (1) is controlled, the stepping motor (1) drives the locking end cover (5) to move downwards until the locking end cover moves to a locking action stroke, namely the locking and releasing mechanism is considered to be locked in place, the stepping motor (1) stops rotating, and a locking task is completed; in the locking process, when the stepping motor (1) drives the locking end cover (5) to move downwards, the locking end cover (5) and the locking driven end (6) are in a taper hole matching relationship, so that the locking end cover (5) pushes the locking driven end (6) to move downwards, when the locking is in place, the locking bottom surface (6B) of the locking driven end (6) is clamped between the locking end cover (5) and the top plane of the guide sleeve (4), and meanwhile, due to the taper hole matching relationship of the locking end cover (5) and the locking driven end (6), the locking driven end (6) is clamped and fixed at a geometric center position, and the locking limiting effect on the locking driven end (6) is realized;

step 3, when the locking and releasing mechanism needs to be in an unlocking state, the stepping motor (1) is reversely controlled, so that the stepping motor (1) drives the locking end cover (5) to move upwards, and the locking end cover (5) is further far away from the locking bottom surface (6B) of the locking passive end (6) until the locking end cover moves to an unlocking action stroke; the stepping motor (1) stops rotating, and the unlocking task is completed; at this moment, the spatial distance between the plane of the top of the guide sleeve (4) and the bottom surface of the locking end cover (5) is the distance of the vertical movement up and down of the locking bottom surface (6B) of the locking passive end (6), in addition, because the locking bottom surface (6B) of the locking passive end (6) is sleeved outside the locking guide rod (3), the vertical movement of the locking bottom surface (6B) of the locking passive end (6) is limited and restricted by the locking guide rod (3), namely: the locking bottom surface (6B) of the locking passive end (6) can move in the vertical direction in a constraint space formed by the locking guide rod (3) and the main locking end cover (5) of the guide sleeve (4), and has a certain vertical movement range, so that the vibration isolation object has a certain floating movement space; the locking end cover (5) realizes the top limiting function.

Preferably, after sudden power failure occurs, the micro travel switch (7) is used as a basis for judging the locking in-place action, namely: when the trigger instruction of the micro travel switch (7) is detected, the locking and releasing mechanism is considered to be locked in place.

The automatic locking and releasing mechanism with the limiting function and the locking and releasing operation method provided by the invention have the following advantages that:

the automatic locking and releasing mechanism with the limiting function provided by the invention has the advantages of simple structure, convenience in processing, reusability, safety and reliability in mechanism movement, moderate locking force, small size, weight, power consumption and occupied resources, convenience and flexibility in installation and use, and is very suitable for the field of on-rail locking and releasing in the microgravity active vibration isolation technology.

Drawings

FIG. 1 is a front view of the automatic lock and release mechanism provided by the present invention;

FIG. 2 is a top view of the automatic lock and release mechanism provided by the present invention;

FIG. 3 is a cross-sectional view of the automatic lock and release mechanism provided by the present invention in a locked state;

FIG. 4 is a cross-sectional view of the automatic lock and release mechanism provided by the present invention in an unlocked state;

FIG. 5 is a perspective view of the automatic lock and release mechanism provided by the present invention;

FIG. 6 is a perspective view of the automatic locking release mechanism of the present invention with the locking passive end hidden;

FIG. 7 is a perspective view of the automatic locking release mechanism of the present invention with the locking passive end and guide sleeve hidden;

FIG. 8 is a perspective view of a locking passive end provided by the present invention;

fig. 9 is a view of a usage scenario of the automatic locking and releasing mechanism provided by the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention provides an automatic locking and releasing mechanism with a limiting function, which can solve the problem of repeated locking and releasing between a space microgravity active vibration isolation technology vibration isolation object and a vibration isolation device on a rail, and can ensure that the automatic moving space of the vibration isolation object is limited within a limited range after releasing, thereby preventing the phenomenon that closed-loop vibration isolation control is invalid because the vibration isolation object is separated from a working area of an electromagnetic actuator.

Referring to the drawings, the present invention provides an automatic locking and releasing mechanism with a limit function, referring to fig. 1 to 8, including: the locking device comprises a stepping motor 1, a lead screw 2, a locking guide rod 3, a guide sleeve 4, a locking end cover 5 and a locking passive end 6;

and the stepping motor with the built-in encoder judges the locking action stroke and the unlocking action stroke according to the encoder parameters. The bottom of the stepping motor 1 is fixed on the base 11 of the vibration isolation device; a guide sleeve 4 is fixedly mounted at the top of the stepping motor 1, for example, the stepping motor 1 and the guide sleeve 4 are fixed by a third screw 10, the third screw is a hexagon socket cap screw, the bottom end of the locking guide rod 3 is slidably arranged in the guide sleeve 4, the top end of the locking guide rod 3 passes through the guide sleeve 4 and extends to the upper side of the guide sleeve 4, and a locking end cover 5 is fixedly mounted at the top end of the locking guide rod 3; for example, for assembly convenience, the locking end cover 5 and the top end of the locking guide rod 3 are fixed by a second screw 9, and the second screw 9 is a hexagon socket countersunk head screw.

The output end of the stepping motor 1 is provided with a lead screw 2, the lead screw 2 can be a trapezoidal lead screw, the lead screw 2 is positioned in the center of the interior of the locking guide rod 3, and the lead screw 2 and the locking guide rod 3 form a lead screw nut pair structure, so that when the stepping motor 1 rotates, the locking guide rod 3 is driven to move up and down through the lead screw 2, and the locking end cover 5 is driven to move up and down;

the bottom surface of the locking passive end 6 is a plane with a locking bottom surface 6B, and a tapered hole 6A is formed in the center of the locking bottom surface 6B of the locking passive end 6, for example, the tapered hole 6A is a tapered hole with a gradually reduced aperture from top to bottom; the outer peripheral surface of the locking end cover 5 is an outer peripheral surface with a diameter gradually reduced from top to bottom. The locking bottom surface 6B of the locking passive end 6 is sleeved outside the locking guide rod 3 through the tapered hole 6A, and meanwhile, the locking bottom surface 6B of the locking passive end 6 is positioned above the guide sleeve 4 and below the locking end cover 5; the peripheral surface of the locking end cover 5 is a conical surface 5A matched with the conical hole 6A; the locking passive end 6 is used for fixing with the bottom surface of the vibration isolation object.

A micro travel switch 7 is fixedly arranged outside the guide sleeve 4; the micro travel switch 7 is fixedly installed outside the guide sleeve 4 by a first screw 8, for example, the first screw 8 is an M2 socket head cap screw, and a through hole is fixedly installed outside the guide sleeve.

Therefore, the invention adopts the working principle that the stepping motor 1 drives 1 the lead screw 2 to directly drive, realizes the up-and-down movement of the locking guide rod 3 in the guide sleeve 4, the end part of the locking guide rod 3 is fixed with the locking end cover 5, and when the locking guide rod 3 moves to the bottom surface of the guide sleeve, the locking driven end 6 is locked and limited; when the locking guide rod 3 moves to be close to the top surface of the guide sleeve, the locking mechanism is unlocked in place, and the locking end cover 5 plays a role in top limiting.

The invention also provides a locking and releasing operation method of the automatic locking and releasing mechanism with the limiting function, which comprises the following steps:

step 1, after an automatic locking and releasing mechanism with a limiting function is assembled, fixing the bottom of a stepping motor 1 and a base 11 of an vibration isolation device, and fixing a locking passive end 6 and the bottom surface of a vibration isolation object; referring to fig. 9, for its usage scenario,

step 2, when the locking and releasing mechanism needs to be in a locking state, the stepping motor 1 is controlled, the stepping motor 1 drives the locking end cover 5 to move downwards until the locking end cover moves to a locking action stroke, namely the locking and releasing mechanism is considered to be locked in place, the stepping motor 1 stops rotating, and a locking task is completed; in the locking process, when the stepping motor 1 drives the locking end cover 5 to move downwards, the locking end cover 5 and the locking passive end 6 are in a taper hole matching relationship, so that the locking end cover 5 pushes the locking passive end 6 to move downwards, when the locking is in place, the locking bottom surface 6B of the locking passive end 6 is clamped between the locking end cover 5 and the top plane of the guide sleeve 4, and meanwhile, due to the taper hole matching relationship between the locking end cover 5 and the locking passive end 6, the locking passive end 6 is clamped and fixed at a geometric center position, so that the locking limiting effect on the locking passive end 6 is realized;

step 3, when the locking and releasing mechanism needs to be in an unlocking state, the stepping motor 1 is reversely controlled, so that the stepping motor 1 drives the locking end cover 5 to move upwards, and the locking end cover 5 is further away from the locking bottom surface 6B of the locking passive end 6 until the locking end cover moves to an unlocking action stroke; the step motor 1 stops rotating, and the unlocking task is completed; at this moment, the spatial distance between the top plane of the guide sleeve 4 and the bottom surface of the locking end cover 5 is the distance of the locking bottom surface 6B of the locking passive end 6, which can vertically move up and down, and in addition, because the locking bottom surface 6B of the locking passive end 6 is sleeved outside the locking guide rod 3, the locking guide rod 3 performs limit constraint on the vertical movement of the locking bottom surface 6B of the locking passive end 6, namely: the locking bottom surface 6B of the locking passive end 6 can move in the vertical direction in the constraint space formed by the locking guide rod 3 and the main locking end cover 5 of the guide sleeve 4, and has a certain vertical movement range, so that the vibration isolation object has a certain floating movement space, and the movement range can be designed to be +/-10 mm under the normal condition. (ii) a The locking end cap 5 achieves a top limiting effect.

When sudden power failure occurs, the stepping motor cannot judge the position of the stepping motor, and the micro travel switch 7 is used as a locking in-place action interpretation basis from the aspect of reliability, namely: when the trigger command of the micro travel switch 7 is detected, the locking and releasing mechanism is considered to be locked in place.

The invention provides an automatic locking and releasing mechanism with a limiting function, aiming at moving objects which need a certain degree of freedom of movement when unlocked and are restricted to be immobile when locked, such as a magnetic suspension active vibration isolation device in a spacecraft.

The automatic locking and releasing mechanism with the limiting function provided by the invention has the advantages of simple structure, convenience in processing, reusability, safety and reliability in mechanism movement, moderate locking force, small size, weight, power consumption and occupied resources, convenience and flexibility in installation and use, and is very suitable for the field of on-rail locking and releasing in the microgravity active vibration isolation technology.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements should also be considered within the scope of the present invention.