CN210769814U - Limiting mechanism with one-way self-locking function - Google Patents

Abstract

The utility model relates to a stop gear with one-way self-locking function, include: the lock comprises a lock sleeve, a limiting unit and a lock releasing unit, wherein the lock sleeve is provided with a containing groove penetrating through two end faces of the lock sleeve, and the inner circumferential surface of the containing groove is a circumferential surface formed by connecting a tooth surface and a non-tooth surface; the limiting unit comprises two tooth blocks and an elastic piece positioned between the two tooth blocks, the tooth blocks are rotatably arranged in the accommodating groove, and the elastic piece has the potential energy for driving each tooth block to enable the tooth part of each tooth block to be close to the inner circumferential surface of the accommodating groove; the limiting blocks of the unlocking unit are positioned in the accommodating groove and respectively limit each tooth block so that each tooth block is separated from the inner circumferential surface of the accommodating groove. The non-tooth surface is arranged in the lock sleeve of the limiting mechanism, and the limiting mechanism can freely move in a certain range at the initial position, so that the limiting mechanism can adapt to the conditions of inconsistent installation state and different initial angles.

Description

Limiting mechanism with one-way self-locking function

Technical Field

The utility model relates to a stop gear, especially a stop gear with one-way self-locking function.

Background

In the mechanical design, a mechanism is needed to drive a member (a combined member or an assembly) to perform unfolding and folding movements, and when the member (the combined member or the assembly) rotates to a certain angle from an initial position, the member (the combined member or the assembly) can stop and keep the member at the certain angle, and the member (the combined member or the assembly) is allowed to rotate to the certain angle again and is folded to the initial state. The component is not stressed in the initial state, and is subjected to a large acting force in one direction in the unfolding state, so that the component is used for the conditions that the installation state is inconsistent and the initial angle is different.

The mechanism capable of satisfying the above-described use condition needs to have the following functions: 1. the self-locking device has a one-way self-locking function at any time when moving to a certain range in the unfolding process; 2. the unlocking one-way self-locking function can be realized after the continuous unfolding; 3. the self-locking device can not have a one-way self-locking function when being retracted to a certain range of the initial position, but has a one-way self-locking function when being unfolded at the position.

The existing ratchet mechanism can meet the requirement of one-way self-locking, but cannot be unlocked or manually unlocked, such as a flywheel, a ratchet wrench and the like. There is a mechanism which can have the function of automatic unlocking, but the self-locking angle is few, and the self-locking condition of any angle is not satisfied, such as the armrest on the seat on the bus.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a stop gear with one-way self-locking function to satisfy the installation status inconsistent, the operational environment that initial angle differed.

In order to achieve the above object, the utility model adopts the following technical scheme: a limiting mechanism with a one-way self-locking function comprises: the lock sleeve is provided with a containing groove penetrating through two end faces of the lock sleeve, and the inner circumferential surface of the containing groove is a circumferential surface formed by connecting a tooth surface and a non-tooth surface; the limiting unit comprises two tooth blocks and an elastic piece positioned between the two tooth blocks, the tooth blocks are rotatably arranged in the accommodating groove and are respectively positioned at two sides of the center of the accommodating groove, each tooth block is provided with a tooth part meshed with the tooth surface, and the elastic piece has potential energy for driving each tooth block to enable the tooth part of each tooth block to be close to the inner circumferential surface of the accommodating groove; and the unlocking unit comprises a limiting plate arranged at one end of the lock sleeve, two limiting blocks are arranged on the limiting plate, and the two limiting blocks are positioned in the accommodating groove and respectively limit each tooth block so as to separate each tooth block from the inner peripheral surface of the accommodating groove.

The lock sleeve comprises a base body and positioning rings arranged at two ends of the base body and extending outwards along the axis of the base body, and the containing grooves are formed in the centers of the base body and the positioning rings.

Two shifting blocks which are symmetrically arranged by taking the axis of the positioning ring as the center are arranged on one end surface of the two positioning rings.

One side of the limiting plate, which is far away from the limiting block, is provided with a stop block, and the stop block and the shifting block are matched to stir the limiting block to rotate along with the lock sleeve.

This stop gear still including set up in the end cover at storage tank both ends, every the end cover is protruding to be equipped with towards the circular crimping portion of this storage tank towards one side middle part of storage tank, crimping portion and the coaxial setting of this end cover, and its center is offered the connecting hole that is used for the connecting piece of erection joint two end covers, the both sides of connecting hole all are provided with the counter bore, and two counter bores all set up at crimping portion.

The elastic piece is sleeved on the outer side of the connecting piece.

Each tooth block is hinged to the containing groove through a supporting shaft, and two ends of the supporting shaft are correspondingly installed in the counter bores.

One side of the tooth block facing the inner circumferential surface of the accommodating groove is provided with a limiting part protruding towards the inner circumferential surface of the accommodating groove, and the limiting part is used for being matched with a limiting block so that a tooth part of the tooth block is not meshed with the tooth surface.

The outside of the lock sleeve is provided with a support rod which extends outwards.

The limiting plate is provided with two waist-shaped holes penetrating through the end face of the limiting plate.

The utility model has the advantages that: the utility model discloses stop gear sets up the non-flank of tooth in the lock sleeve, and this stop gear has the free activity of within a certain range at initial position for this stop gear can be adapted to the condition that mounted state is inconsistent, initial angle is differentiated. The arrangement of the unlocking unit enables the limiting mechanism to have the function of self-unlocking compared with the existing ratchet mechanism; through the setting of flank of tooth section, guaranteed that this stop gear realizes the auto-lock at arbitrary angle within the auto-lock scope, increased convenience and the commonality of using. In addition, the limiting mechanism is provided with the tooth block and the limiting block in the lock sleeve with the tooth surface and the non-tooth surface, so that the limiting mechanism has the functions of one-way self-locking and self-unlocking, and is reasonable in design, exquisite and compact in structure and easy to popularize and implement.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention. In the figure:

fig. 1 is a schematic perspective view of the limiting mechanism of the present invention;

fig. 2 is a schematic view of a three-dimensional exploded structure of the limiting mechanism of the present invention;

fig. 3 is a schematic sectional view of the limiting mechanism in the front view direction;

FIG. 4 is a schematic structural view of the limiting mechanism in a side view;

FIG. 5 is a perspective view of the lock sleeve;

fig. 6 is a perspective view of one of the view angles of the limiting plate;

fig. 7 is a perspective view of another perspective view of the limiting plate.

In the figure: 1. the lock sleeve 11 and the base body 12, 121 and 122 are all limiting rings 13, a shifting block 100, a containing groove 101, a tooth surface 102, a non-tooth surface 111 and the inner circumferential surface of the containing groove;

2. a limiting unit 21, an elastic piece 22, a tooth block 221, a tooth part 222, a mounting part 223, a mounting hole 224, a limiting part 022, a first tooth block 122 and a second tooth block;

3. the support shafts 31 and 33 are shaft heads 32 and support shaft bodies;

4. the unlocking unit 41, the limiting plate 411, the inner block 412, the waist-shaped hole 413, the block 431, the inner side face of the block 432, the outer side face of the block 414, the through hole 415, the convex ring 451, the inner side face of the convex ring 452 and the outer side face of the convex ring;

5. a connecting member;

6. the end cover comprises an end cover 61, a left end cover 62, a right end cover 601, a crimping part 602, a connecting hole 603, a mounting groove 604, a fixing plate 605, an annular containing groove 606, a wall plate 607 of the end cover and an end plate;

8. a support rod.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

Spatially relative terms, such as "above … …," above … …, "" above … …, and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures, and it is to be understood that spatially relative terms are intended to encompass different orientations of use or operation in addition to the orientation of the device as depicted in the figures. For example, if the device in the figures is turned over, it would be described as "under" or "beneath" other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances for describing embodiments of the invention herein.

Example 1: referring to fig. 1, 2 and 3, the present invention provides a first embodiment of a limiting mechanism with one-way self-locking function: the method comprises the following steps: the lock comprises a lock sleeve 1, a limiting unit 2 and a lock releasing unit 4. The limiting mechanism of this embodiment further includes end covers 6 disposed at two ends of the accommodating groove 100, the two end covers 6 are a left end cover 61 and a right end cover 62 respectively, the end covers 6 are used for sealing the accommodating groove 100, it is ensured that components in the accommodating groove 100 do not fall out of the accommodating groove, and the left end cover 61 and the right end cover 62 are connected through a connecting piece 5.

Referring to fig. 2 and 5, the lock sleeve 1 has a receiving groove 100 penetrating through two end faces thereof, and an inner circumferential surface 111 of the receiving groove 100 is a circumferential surface formed by connecting a tooth surface 101 and a non-tooth surface 102; the lock sleeve comprises a base body 11 and positioning rings 12 which are arranged at two ends of the base body 11 and extend outwards along the axis L1 of the base body 11, the base body 11 is annular, and the centers of the base body 11 and the positioning rings 12 are provided with accommodating grooves 100, namely the hollow parts of the base body 11 and the positioning rings 12 are the accommodating grooves 100. The inner circumferential surface 100 of the accommodating groove 100 is designed to be a non-tooth surface 102 around the circumferential surface formed by the axis L1 thereof, so that the limiting mechanism of the embodiment has a certain angle and no one-way self-locking function in the state of the initial retraction position, and is used for mounting and using different products. The outside of the lock sleeve 1 is provided with a support rod 8 extending outwards, specifically, the outside of the base body 1 is provided with the support rod 8, and the support rod 8 is used for being directly connected or indirectly connected with a component (a combined piece or an assembly) needing to be supported, limiting and self-locking the component, so that the component keeps a certain angle.

As shown in fig. 5, the lock sleeve 1 includes a base 11, and a positioning ring 121 and a positioning ring 122 disposed at both ends of the base 11 and extending outward along an axis L1 thereof, and the base 11, the positioning ring 121, and the positioning ring 122 are disposed with the receiving groove 100 at the center thereof.

The limiting unit 2 comprises two tooth blocks 22 and an elastic member 21 located between the two tooth blocks 22, each tooth block 22 is rotatably disposed in the accommodating groove 100 and located on two sides of the center of the accommodating groove 100, each tooth block 22 has a tooth portion 221 engaged with the tooth surface 101, and the elastic member 21 has potential energy for driving each tooth block 22 so that the tooth portion 221 of each tooth block 22 is constantly (always) close to the inner circumferential surface 11 of the accommodating groove 100. The elastic member 21 may be a spring or other elastic member capable of driving the tooth block 22

One end of the tooth block 22 away from the tooth part 221 has a mounting part 222, the mounting part 222 has a mounting hole 223, and the mounting hole 223 penetrates both end faces of the mounting part. The tooth block 22 is disposed in the receiving groove 100 through the supporting shaft 3, and a side of the tooth block 22 facing the inner circumferential surface 111 of the receiving groove 100 has a limiting portion 224 protruding toward the inner circumferential surface 111 of the receiving groove 100, and preferably, a working surface of the limiting portion 224 is a plane. The back shaft 3 is the step axle, including cylindrical back shaft body 32 and set up in cylindrical spindle nose 31 and 33 at back shaft body 32 both ends, and back shaft body 32 is located mounting hole 223, and tooth piece 22 encircles back shaft 3 swing under the drive of lock sleeve 1. The limiting block 411 is located between the inner circumferential surface 111 of the receiving groove 100 and the tooth block, and the limiting portion 224 is used for cooperating with the limiting block to make the tooth portion 221 of the tooth block 22 not engage with the tooth surface 102, at this time, the limiting mechanism does not have a one-way self-locking function. Referring to fig. 3 and 5, the two tooth blocks 22 are divided into a first tooth 022 and a second tooth block 122, the first tooth 022 and the second tooth block 122 are symmetrically arranged with an axis L1 as an axis, the inner circumferential surface 111 of the corresponding accommodating groove 100 is composed of two sections of tooth surfaces 101 with equal length and two sections of non-tooth surfaces 102 with equal length, the tooth surface sections 101 and the non-tooth surface sections 102 are alternately connected to form the inner circumferential surface 111, and the teeth 221 of the first tooth 022 and the second tooth block 122 are respectively meshed with the corresponding tooth surfaces 101.

The unlocking unit 3 includes a limiting plate 41 disposed at one end of the lock sleeve 1, two limiting blocks 411 are disposed on the limiting plate 41, and the two limiting blocks 411 are disposed in the accommodating groove 100 to limit each tooth block 22 respectively so that each tooth block 22 is separated from the inner circumferential surface 111 of the accommodating groove 100, and the one-way self-locking function is lost. In this embodiment, the diameter of the position-limiting plate 41 is slightly smaller than the diameter of the accommodating groove 100, the position-limiting plate 41 is disposed in the accommodating groove 100 and located at one end of the accommodating groove 100, and the position-limiting plate 41 is located at one side of the tooth block 22. As shown in fig. 5 and 6, a protruding ring 415 extending to the end cover 6 is disposed on one side of the limiting plate 41 departing from the limiting block 411, two stoppers 413 are disposed on the protruding ring 415, each stopper 413 extends in a direction away from an axis of the limiting plate 41, an inner side surface 431 of each stopper 413 and an inner side surface 451 of each protruding ring 415 are located on the same circumferential surface, an outer side surface 432 of each stopper 413 exceeds an outer side surface 452 of each protruding ring 415, an outer side surface of each stopper 413 is a circular ring surface, the limiting plate 41 is disposed on an end surface of the lock sleeve 1 through the stopper 413 and is located in the accommodating groove 100, each limiting block 411 and each stopper 413 are staggered, and an extending surface of each stopper 413 in a direction towards the limiting. Referring to fig. 3, the limiting block 411 is disposed in the accommodating groove 100, when the stopper 413 is driven by the shifting block 13 to rotate along with the lock sleeve 1, the limiting block 411 contacts with the limiting portion 224, and the tooth portion 221 of the tooth block 22 is separated from the inner circumferential surface 111 of the accommodating groove 100 under the squeezing action of the limiting block 411 by the tooth block 22. In the initial state of the lock sleeve 1 without force, the shifting block 13 can contact the stop 413. The center of the limiting plate 41 is provided with a through hole 414 for passing through the connecting piece 5, waist-shaped holes 412 are symmetrically distributed on two sides of the through hole 414, the waist-shaped holes 412 penetrate through two end faces of the limiting plate 41, and the support shaft 3 penetrates through the waist-shaped holes 412, so that the rotation angle of the limiting plate 41 is controlled, and the failure of the limiting mechanism caused by the overlarge rotation angle of the lock sleeve 1 is avoided. The two waist-shaped holes 412 are both arc-shaped and are arranged coaxially with the limiting plate, and the width of the waist-shaped hole 412 is slightly larger than the diameter of the supporting shaft body 32, so that the supporting shaft 3 is ensured not to influence the rotation of the limiting plate 41.

Referring to fig. 2, the end cap 6 includes an end plate 607 and a wall plate 606 extending to the receiving groove 100 along an edge of the end plate 607, a circular crimping portion 601 protruding toward the receiving groove 100 is disposed at a middle portion of one side of each end cap 6 facing the receiving groove 100, the crimping portion 601 is disposed coaxially with the end cap 6, the wall plate 607 is higher than the crimping portion 601, an annular receiving groove 605 is formed between an inner surface of the wall plate 606 and the crimping portion 601, a connecting hole 602 for installing a connecting member 5 connecting two end caps 6 is disposed at a center of the crimping portion 601, the connecting hole 602 penetrates through the crimping portion, and is a counterbore, one side of the counterbore is disposed at a side away from the receiving groove 100, the connecting hole 602 may be a light hole or a. Referring to fig. 4, when the right end cap 62 is assembled to the lock sleeve 1, the press-connection portion 601 extends into the receiving groove 100 and contacts with one side of the tooth block 22, the positioning ring 122 is located in the annular receiving groove 605, and the width of the positioning ring 122 is equal to or slightly smaller than the depth of the annular receiving groove 605. At this time, the positioning ring 121, the stopper 413 and the dial 13 are located in the annular groove 605 of the left end cover 61. The preferred, the thickness of dog 413 and the height of shifting block 13 equal, so design, dog 413 top surface and shifting block 13 top surface are located the coplanar, and holding tank 605 diapire can support to press on dog 413 and shifting block 13 top surface, has guaranteed that limiting plate 41 can not produce in the course of the work and has rocked. Preferably, the height of the positioning ring 122 is equal to the sum of the height of the positioning ring 124 and the height of the shifting block 13, so that the left and right end covers 61, 62 can have the same structure and size, and are convenient to process.

Mounting grooves 603 are provided at both sides of the coupling hole 602, and both the mounting grooves 603 are provided at the crimping portion 601. The mounting groove 603 is a blind hole and is used for mounting the spindle nose 33 and the spindle nose 31 of the support shaft, specifically, the spindle nose 33 is arranged in the mounting hole 603 of the right end cover 62, the spindle nose 31 is arranged in the mounting hole 603 of the left end cover 61, the step surfaces at two ends of the support shaft body 32 abut against the corresponding crimping parts 601, the length of the support shaft body 32 is equal to or slightly greater than the distance H1 between the two crimping parts 601, and by adopting the design, the end cover 6 is prevented from pressing the lock sleeve 1, and the lock sleeve 1 is ensured to rotate under the driving of external force.

In this embodiment, a fixing plate 604 is disposed on one side of each end cover 6 away from the receiving groove 100, and the fixing plate 604 is used for connecting with other members or fixing the limiting mechanism of the present invention on other members. The shape, thickness and specific position of the fixing plate 604 are determined according to the use conditions.

The utility model discloses a working process: the supporting rod 8 is rotated, the supporting rod 8 drives the lock sleeve 1 to rotate, and when the tooth block 22 is at the section of the non-tooth surface 101, the limiting mechanism does not have a one-way self-locking function; the lock sleeve 1 continues to rotate until the tooth surface has a one-way self-locking function; the lock sleeve 1 continues to rotate, the shifting block 13 on the lock sleeve shifts the stop 413 of the limit plate 41, so that the limit plate 41 is driven to rotate, the limit block 411 rotates along with the limit plate 41 in the accommodating groove 100, the limit block is pressed on the limit part 224, the tooth part 221 of the tooth block 22 is separated from the inner circumferential surface 111, and the limit mechanism does not have a one-way self-locking function at this time. The lock sleeve 1 can no longer rotate due to the kidney-shaped hole 413.

The lock sleeve 1 is defined as being not stressed (i.e. when the support rod 8 is horizontal) as an initial position, in this embodiment, the initial position is a free movement space of 30 degrees, at this time, the limiting mechanism does not have a one-way self-locking function, the support rod 8 has a self-locking function at any angle in the process of moving to 20 degrees to 125 degrees, when the support rod rotates 132 degrees, the one-way self-locking function is lost, because the waist-shaped hole 412 is arranged, the maximum rotation angle of the support rod is 150 degrees, the position is retracted to the initial position, when the support rod moves to 10 degrees, the lock sleeve 1 shifts the limiting plate 41 to drive the limiting block 411 to press against the limiting part 224 of the tooth block 22, so that the tooth part 221 is separated from the inner circumferential surface 111, at this time, the limiting mechanism does not have a one-way self.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a stop gear with one-way self-locking function which characterized in that includes:

the lock sleeve is provided with a containing groove penetrating through two end faces of the lock sleeve, and the inner circumferential surface of the containing groove is a circumferential surface formed by connecting a tooth surface and a non-tooth surface;

the limiting unit comprises two tooth blocks and an elastic piece positioned between the two tooth blocks, the tooth blocks are rotatably arranged in the accommodating groove and are respectively positioned at two sides of the center of the accommodating groove, each tooth block is provided with a tooth part meshed with the tooth surface, and the elastic piece has potential energy for driving each tooth block to enable the tooth part of each tooth block to be close to the inner circumferential surface of the accommodating groove; and

and the unlocking unit comprises a limiting plate arranged at one end of the lock sleeve, two limiting blocks are arranged on the limiting plate, and the two limiting blocks are positioned in the accommodating groove and respectively limit each tooth block to enable each tooth block to be separated from the inner peripheral surface of the accommodating groove.

2. The spacing mechanism with the one-way self-locking function as claimed in claim 1, wherein the lock sleeve comprises a base body and positioning rings arranged at two ends of the base body and extending outwards along the axis of the base body, and the receiving groove is arranged at the centers of the base body and the positioning rings.

3. The limiting mechanism with the one-way self-locking function according to claim 2, wherein two shifting blocks symmetrically arranged by taking the axis of the positioning ring as the center are arranged on one end surface of the two positioning rings.

4. The limiting mechanism with the one-way self-locking function according to claim 3, wherein a stopper is arranged on one side of the limiting plate away from the limiting block, and the stopper and the shifting block are matched to shift the limiting block to rotate along with the lock sleeve.

5. The limiting mechanism with the one-way self-locking function according to claim 1 or 2, further comprising end caps disposed at two ends of the receiving groove, wherein a circular crimping portion protruding toward the receiving groove is disposed at a middle portion of one side of each end cap, the crimping portion is disposed coaxially with the end caps, a connecting hole for installing a connecting piece connecting the two end caps is disposed at a center of the crimping portion, counterbores are disposed at two sides of the connecting hole, and the two counterbores are disposed at the crimping portion.

6. The limiting mechanism with the one-way self-locking function according to claim 5, wherein the elastic member is sleeved outside the connecting member.

7. The limiting mechanism with the one-way self-locking function according to claim 5, wherein each tooth block is hinged to the accommodating groove through a supporting shaft, and two ends of the supporting shaft are correspondingly installed in the counter bores.

8. The spacing mechanism with one-way self-locking function as claimed in claim 1, wherein the side of the tooth block facing the inner circumferential surface of the receiving groove has a spacing portion protruding toward the inner circumferential surface of the receiving groove, the spacing portion is used for cooperating with a spacing block to make the tooth portion of the tooth block not engage with the tooth surface.

9. The limiting mechanism with the one-way self-locking function according to claim 1, wherein a support rod extending outwards is arranged outside the lock sleeve.

10. The limiting mechanism with the one-way self-locking function according to claim 1 or 4, wherein the limiting plate is provided with two kidney-shaped holes penetrating through the end surface of the limiting plate.

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