CN221323022U - Lock nut - Google Patents

Abstract

The utility model discloses a lock nut, which comprises: a housing (1); the two inner circumferential walls are provided with threaded half nuts (2), wherein at least one half nut is provided with a stop block (21) extending outwards; a push button (3) which is slidable relative to the housing, wherein the push button has a push rod (31); when the button is pressed down along the radial direction of the half nuts, the button slides relative to the shell, and the half nuts with the stop blocks are driven to slide relative to the shell, so that the two half nuts are switched from a closed state to an open state; and an elastic member (4) provided between an outer circumferential wall of the half nut having the stopper and an inner side wall of the housing, the elastic member applying an elastic force to the half nut to switch the two half nuts from an open state to a closed state when an external force pressing the button is removed.

Description

Lock nut

Technical Field

The present utility model relates to a fastening device, and more particularly, to a nut.

Background

In the case of power tools, it is often necessary to install or replace accessories, such as drills, cutting or grinding tools, etc., which are adapted to the power tool during use.

The connection between these accessories and the power tool can be achieved by means of connecting fasteners, for example by means of nuts.

However, the problem that exists today is that even with connecting fasteners, such as nuts, the use thereof is still not convenient enough, on the one hand because the screwing of these nuts may require the use of additional tools, such as wrenches, and on the other hand because the replacement or installation of these accessories still takes more time, because the connection of the nuts to the power tool or accessory is achieved, requiring a large number of turns, which objectively reduces the efficiency of the production or work.

There is, of course, also a nut for achieving a relatively quick connection, but which during the quick connection tends to seize in the event of uneven stresses due to the asymmetrical structure.

Disclosure of utility model

One of the objects of the present utility model is to provide a locking nut which is capable of achieving a quick connection with a connected member, such as a spindle of an electric power tool, while being stable in structure and not prone to jamming during the quick connection.

In order to achieve the above object, the present utility model proposes a lock nut including:

A housing;

Two half nuts which can be opened or closed opposite to each other and are arranged in the shell, and threads are arranged on the inner circumferential wall of each half nut; wherein, at least one half nut is provided with a stop block which extends outwards from the outer circumferential wall of the half nut;

A button provided on the housing and slidable with respect to the housing, the button having a push rod protruding toward the stopper; when the button is pressed down along the radial direction of the half nut, the button slides relative to the shell, and drives the push rod to apply force to the stop block so as to enable the half nut with the stop block to slide relative to the shell, so that the two half nuts are switched from a closed state to an open state;

And an elastic member provided between an outer circumferential wall of the half nut having the stopper and an inner side wall of the housing, the elastic member applying an elastic force to the half nut to switch the two half nuts from an open state to a closed state when an external force pressing the button is removed.

Further, in some embodiments:

The two half nuts are symmetrically arranged in the shell by taking the axle center of the shell as a symmetrical center, wherein each half nut is provided with a stop block which extends outwards from the outer circumferential wall of each half nut;

The buttons are arranged in pairs, are symmetrically arranged on the shell by taking the axle center of the shell as a symmetrical center, and can slide relative to the shell, wherein each button is provided with a push rod extending towards the stop block; when the two buttons are relatively pressed down along the radial direction of the half nuts, the two buttons slide along the shell to drive the corresponding push rods to apply force to the corresponding stop blocks so that the two half nuts slide along the shell, and the two half nuts are switched from a closed state to an open state;

The elastic elements are arranged in pairs and symmetrically with the axis of the shell as a symmetrical center, each elastic element is correspondingly arranged between the outer circumferential wall of the corresponding half nut and the inner side wall of the shell, and each elastic element applies elastic force to the corresponding half nut so as to enable the two half nuts to switch from an open state to a closed state when the external force pressing the button is removed.

Further, in some embodiments, one of the two half nuts is configured to be slidable with respect to the housing, the other half nut is fixedly disposed with respect to the housing, and the center of gravity of the lock nut falls in the axial direction thereof.

Further, in some embodiments, the resilient element comprises a spring.

Further, in some embodiments, the lock nut further comprises: a locking cover axially held in the housing and rotatable about its own axis relative to the housing, the locking cover being sleeved on the peripheries of the half nuts provided in pairs; when the locking cover rotates to a locking station around the axis of the locking cover, the first inner wall part of the locking cover abuts against the outer circumferential wall of the half nut so as to lock the half nut in the closed state; when the locking cover rotates around the axis to the unlocking station, a gap is reserved between the second inner wall part of the locking cover and the outer circumferential wall of the half nut, so that the half nuts arranged in pairs can be opened relatively.

Still further, in some embodiments, the inner wall of the locking cap has a reduced profile, wherein the first inner wall portion is configured as a small radius portion of the profile and the second inner wall portion is configured as a large radius portion of the profile.

Further, in some embodiments, the locking cap has an axially protruding grip.

Still further, in some embodiments, the outer wall of the hand-held portion is provided with corrugations.

Further, in some embodiments, a limit groove is provided on an inner wall of the housing, and the locking cover is axially held in the housing by a limit washer correspondingly provided in the limit groove.

Still further, in some embodiments, the limit washer is coupled to the locking cap to be capable of rotating in synchronization with the locking cap.

Further, in some embodiments, a first sliding groove is provided on the housing, and the button is provided in the first sliding groove so as to be capable of sliding along the first sliding groove relative to the housing.

Further, in some embodiments, a second sliding groove is formed on an inner side wall of the housing, and an end of the stopper is disposed in the second sliding groove so as to be capable of sliding along the second sliding groove relative to the housing.

When the locking nut is used, the relative opening of the two half nuts can be realized rapidly through one action of pressing the button, and the two half nuts can be reset to a relatively closed state rapidly based on the elasticity of the elastic element when the button is released, so that the two half nuts are clamped on a part to be connected, such as a rotating shaft of an electric tool machine, and the connection is realized by rotating the nuts for a plurality of times, and the connection efficiency is greatly improved.

In addition, in some preferred embodiments, the locking nut of the present utility model has a symmetrical structure, so that the force is more uniform and stable, and the locking nut is not easy to be blocked, so that the locking nut of the present utility model is suitable for a connected piece rotating at a high speed, such as a rotating shaft of a power tool rotating at a high speed.

Drawings

Fig. 1 shows a schematic perspective view of a back view of a lock nut according to an embodiment of the utility model.

Fig. 2 shows a top view of a lock nut according to the utility model in an embodiment.

Fig. 3 shows a cross-sectional view at H-H in fig. 2.

Fig. 4 shows a back view of the locking cap of the locking nut of the present utility model in one embodiment.

Fig. 5 shows the locking nut of the present utility model in an embodiment with the locking cap in an unlocked position.

Fig. 6 shows the locking nut of the present utility model in one embodiment with the locking cap in a locked position.

Fig. 7 shows a front view of the locking cap of the locking nut of the present utility model in one embodiment.

Fig. 8 exemplarily shows a state in which the lock nut according to the present utility model is mounted on a connected member.

Detailed Description

The locking nut according to the utility model will be further explained and illustrated in the drawings and in the specific examples, which, however, do not constitute a undue limitation on the technical solutions of the utility model.

During the use of the electric power tool, it is often necessary to install or replace accessories, such as drills, cutting tools, grinding tools, which are adapted to the electric power tool. The connection between these accessories and the power tool is often made by means of nuts.

The problem that exists at present is that the screwing of these nuts usually requires the use of additional tools and that it takes more time to replace or install the drill bit, the tool, since the connection of the nut to the power tool or the accessory requires a large number of rotations, which affects the efficiency of the production or work.

Based on this, the present utility model provides in one embodiment a lock nut comprising: a housing serving as a bracket for the entire lock nut; two half nuts capable of being opened or closed opposite to each other, which are all arranged in the shell, wherein the inner circumferential wall of each half nut is provided with threads; and wherein at least one of the nut halves is provided with a stop extending outwardly from its outer circumferential wall. The shell is also provided with a button which can slide relative to the shell and is provided with a push rod extending towards the stop block; when the button is pressed down along the radial direction of the half nuts, the button slides relative to the shell, and the push rod is driven to apply force to the stop block, so that the half nut with the stop block slides relative to the shell, and the two half nuts are switched from a closed state to an open state. Further, an elastic member is provided between the outer circumferential wall of the half nut having the stopper and the inner side wall of the housing, the elastic member applying an elastic force to the half nut to switch the two half nuts from the opened state to the closed state when an external force pressing the button is removed.

When the locking nut is used, the relative opening of the two half nuts can be realized rapidly through one action of pressing the button, and the two half nuts can be reset to a relatively closed state rapidly based on the elasticity of the elastic element when the button is loosened, so that the two half nuts are clamped on a part to be connected, such as a rotating shaft of an electric tool, and the connection is realized by rotating the nuts for a plurality of times, and the connection efficiency is greatly improved.

In some more preferred embodiments, in order to further improve the convenience of use and the stability of stress of the locking nut, the locking nut is designed to have a symmetrical structure, so that the locking nut is stressed more uniformly and stably, and is not easy to be blocked.

Fig. 1 shows a schematic perspective view of a back view of a lock nut according to the utility model in a preferred embodiment.

As shown in fig. 1, in some embodiments, the lock nut comprises a substantially cylindrical housing 1; the half nuts 2 arranged in pairs are symmetrically arranged in the housing 1 with the axis of the housing 1 as a symmetrical center, wherein each half nut 2 is provided with a stop 21 extending outwards from its outer circumferential wall, and the inner circumferential wall of each half nut 2 is provided with a thread S for connection with a connected piece, such as a spindle of a power tool. As shown in fig. 1, it is preferable for each half nut to have at least two outwardly projecting stops 21 to achieve a more uniform force.

With continued reference to fig. 1, the lock nut further includes paired buttons 3 which are symmetrically disposed on the housing 1 with the axis of the housing 1 as a symmetry center and are capable of sliding with respect to the housing 1.

In some more specific embodiments, a first sliding groove is provided on the bottom inner end surface of the housing 1, and the button 3 is correspondingly provided in the first sliding groove, so that it can slide along the first sliding groove relative to the housing 1. In the view shown in fig. 1, the first runner is hidden from view by the button 3, since the button 3 is already disposed within the first runner.

With continued reference to fig. 1, each push button 3 has a push rod 31 projecting towards the stop 21 of the half-nut 2, when the push button 3 is depressed in the radial direction of the half-nut 2, the push button 3 slides with respect to the housing 1, driving the push rod 31 to exert a force on the stop 21 to push the half-nut 2 also to slide with respect to the housing 1, so as to switch the two half-nuts 2 from the closed condition to the open condition shown in fig. 1. In this state, the lock nut in the open state can be put over the connected member.

In some more specific embodiments, a second runner (not shown) may be provided on the inside wall of the housing 1, into which the end of the stop 21 of the half-nut 2 may extend to be able to slide along the second runner with respect to the housing, so as to provide a guide for the sliding of the half-nut 2 with respect to the housing.

Of course, in other more specific embodiments, a second runner may be provided on the bottom inner end surface of the housing, and a guide bar or pin may be provided on the half nut such that the guide bar or pin slides along the second runner to provide a guide for sliding the half nut 2 relative to the housing.

With continued reference to fig. 1, the locking nut further includes elastic elements 4 disposed in pairs symmetrically about the axis of the housing 1, and each elastic element 4 is disposed correspondingly between the outer circumferential wall of the half nut 2 corresponding thereto and the inner side wall of the housing 1, the elastic elements 4 applying an elastic force against an external force depressing the button to the half nut 2, such that, upon removal of the external force depressing the button, the elastic force switches (or returns) the half nuts disposed in pairs from the open state to the closed state.

As shown in fig. 1, in some embodiments, the elastic element 4 may comprise a coil spring.

In other embodiments, the resilient element may also be a reed, a tension spring, or other deformation as would occur to one of skill in the art.

In this way, after the locking nut is sleeved on the connected piece, the button is loosened, the half nuts arranged in pairs are rapidly switched from the open state to the closed state under the action of the elastic element, so that the two half nuts are clamped on the connected piece, and the rapid connection is realized.

Of course, in other embodiments, only one of the two half nuts may be designed to be slidable relative to the housing, while the other half nut is fixedly arranged relative to the housing. In this case, it is possible to use only one half nut with push rod pushing the one half nut slidable with respect to the housing, and also to provide only the elastic element between this half nut and the housing. The locking nut in this embodiment also enables a quick relative opening of the two half-nuts by the action of pressing the push button and a quick return to the relatively closed state upon release of the push button, based on the elasticity of the elastic element, so as to clamp the two half-nuts quickly on the parts to which they are to be connected. However, this embodiment is less comfortable to operate and less uniform in stress than the embodiment described above with a symmetrical structure, so that to further ensure that the structure is less prone to seizing, lubrication may be added between the moving elements, for example between the housing and the moving nut halves, so that the stress during operation is more uniform. In addition, when one of the two half nuts is designed to slide with respect to the housing and the other half nut is fixedly disposed with respect to the housing, the whole lock nut is not symmetrical in structure, but the center of gravity of the lock nut can be made to fall in the axial direction thereof by adjusting the weight distribution of each element, so that unnecessary vibration of the lock nut at the time of quick operation is suppressed.

In addition, in order to enable a more secure and reliable connection of the locking nut to the connected piece, in other preferred embodiments of the utility model, the locking nut may further comprise a locking cap.

Fig. 2 shows a top view of a lock nut according to the utility model in an embodiment. Fig. 3 shows a cross-sectional view at H-H in fig. 2.

As shown in fig. 2 and 3, the locking cap 5 is axially held in the housing 1 by a limit washer 6 and is rotatable about its own axis relative to the housing 1. The locking cover 5 is sleeved on the periphery of the half nuts 2 which are arranged in pairs.

The inner wall of the locking cap 5 has a profile line of varying diameter so that the distance between different positions on the inner wall thereof and the outer circumferential wall of the half nut is different. In the unlocking position, the locking cap is turned about its own axis to a position in which the distance between the second inner wall portion and the outer circumferential wall of the half nut is large, so that the two half nuts can be opened relatively. In the locking station, the locking cap is turned about its own axis to a position in which the first inner wall portion abuts against the outer circumferential wall of the half nuts, so that the two half nuts are locked against relative opening.

Fig. 4 shows a back view of the locking cap of the locking nut of the present utility model in one embodiment.

As shown in fig. 4, in this embodiment, the outline of the diameter change of the inner wall 51 of the locking cap 5 is in the shape of an annular race track. Wherein the first inner wall portion 511 is configured as a small radius portion of the annular racetrack profile (which small radius means that its distance from the axis of the half nut is small) and the second inner wall portion 512 is configured as a large radius portion of the annular racetrack profile (which large radius means that its distance from the axis of the half nut is large).

Fig. 5 shows the locking nut of the present utility model in an embodiment with the locking cap in an unlocked position.

In this way, as shown in fig. 5, in the unlocking station, there is a gap G between the second inner wall portion 512 of the locking cap and the outer circumferential wall of the half-nut 2, so that the two half-nuts 2 can be opened relatively.

Fig. 6 shows the locking nut of the present utility model in one embodiment with the locking cap in a locked position.

As shown in fig. 6, in the locking station, the first inner wall portion 511 of the locking cap abuts against the outer circumferential wall of the half nut, thereby locking the half nut in the closed state. In this way, when the two half nuts are clamped on the connected piece, the locking cap 5 is rotated, which can lock the locking nut on the connected piece.

Fig. 7 shows a front view of the locking cap of the locking nut of the present utility model in one embodiment.

As shown in fig. 7, in some embodiments, the locking cap 5 has an axially protruding grip 52, and when the locking cap 5 is to be rotated, the grip 52 can be held by hand to apply force. Therefore, in order to further improve the comfort of use, increase the friction force for the purpose of saving labor, the outer wall of the hand-held portion 52 may be provided with the corrugations 521.

In addition, fig. 7 (with the stop washer removed to enable the stop groove 11 to be more clearly shown) also shows the stop groove 11 for use with the stop washer 6, the stop washer 6 being disposed within the stop groove 11 for axially retaining the locking cap 5 within the housing 1.

With continued reference to fig. 2, in some embodiments, the stop washer 6 may be coupled to the locking cap at its end by engagement of a hole 61 with a raised pin on the locking cap, in such a way that the stop washer may also rotate synchronously within the stop slot as the locking cap rotates about its own axis.

Fig. 8 exemplarily shows a state in which the lock nut according to the present utility model is mounted on a connected member.

As shown in fig. 8, for example, when the angle grinder 100 needs to be replaced, the locking nut 300 needs to be removed first, at this time, the locking cover 5 is turned first so that it is in the unlocking position, then the button 3 is pressed, the two half nuts 2 are opened relatively to each other, the locking nut 300 is quickly removed from the rotating shaft of the electric angle grinder 100, then the angle grinder 200 to be replaced is removed, a new angle grinder is replaced on the rotating shaft of the electric angle grinder 100, then the button 3 is pressed again so that the two half nuts 2 are opened relatively to each other, the two half nuts are sleeved on the rear end of the angle grinder 200 on the rotating shaft of the electric angle grinder 100, the button 3 is released, the two half nuts 2 are reset to the closed state under the action of the elastic member 4, so that the two half nuts are clamped on the rotating shaft of the electric angle grinder 100, then the locking cover is turned so that it is turned to the locking position, and thus the locking nut 300 is firmly locked on the rotating shaft of the electric angle grinder 100.

Therefore, when the locking nut is used, the relative opening of the two half nuts can be realized rapidly through one action of pressing the button, and when the button is loosened, the two half nuts are closed relatively under the action of the elastic element, so that the two half nuts are clamped on a part to be connected, such as a rotating shaft of an electric tool machine, rapidly, and the connecting efficiency is greatly improved.

In addition, the locking nut has a symmetrical structure, so that the locking nut is more uniformly and stably stressed, can be easily locked and released, is not easy to be blocked, and can enable the two half nuts to be flexibly attached to the rotating shaft in a follow-up manner based on the elasticity of the elastic element when the rotating shaft rotates at a high speed, so that the locking nut is particularly suitable for a connected piece rotating at a high speed, such as the rotating shaft of an electric tool machine rotating at a high speed.

It should be noted that the prior art in the protection scope of the present utility model is not limited to the embodiments given in the present utility model document, and all the prior art that does not contradict the scheme of the present utility model, including but not limited to the prior patent document, the prior publication, the prior disclosure, etc. can be included in the protection scope of the present utility model.

In addition, the combination of the features described in the present application is not limited to the combination described in the claims or the combination described in the embodiments, and all the features described in the present application may be freely combined or combined in any manner unless contradiction occurs between them.

It should also be noted that the above-recited embodiments are merely specific examples of the present utility model. It is apparent that the present utility model is not limited to the above embodiments, and similar changes or modifications will be apparent to those skilled in the art from the present disclosure, and it is intended to be within the scope of the present utility model.

Claims (10)

1. A lock nut, comprising:

A housing (1);

Two half nuts (2) which can be opened or closed relative to each other and are arranged in the shell (1), and the inner circumferential wall of each half nut is provided with threads; wherein, at least one half nut is provided with a stop block (21) which extends outwards from the outer circumferential wall of the half nut;

A push button (3) provided on the housing (1) and slidable with respect to the housing (1), the push button (3) having a push rod (31) protruding toward the stopper (21); wherein when the button (3) is pressed down along the radial direction of the half-nuts, the button (3) slides relative to the shell (1) to drive the push rod (31) to apply force to the stop block (21) so as to enable the half-nuts (2) with the stop block to slide relative to the shell (1) and enable the two half-nuts to be switched from a closed state to an open state;

And an elastic member (4) provided between an outer circumferential wall of the half nut having the stopper and an inner side wall of the housing, the elastic member (4) applying an elastic force to the half nut (2) to switch the two half nuts (2) from an open state to a closed state when an external force pressing the button is removed.

2. The lock nut as claimed in claim 1, wherein:

The two half nuts (2) are symmetrically arranged in the shell (1) by taking the axle center of the shell (1) as the symmetrical center, wherein each half nut (2) is provided with a stop block (21) which extends outwards from the outer circumferential wall of each half nut;

The buttons (3) are arranged in pairs, are symmetrically arranged on the shell (1) by taking the axle center of the shell (1) as a symmetry center, and can slide relative to the shell (1), wherein each button (3) is provided with a push rod (31) extending towards the stop block (21); when the two buttons (3) are pressed relatively along the radial direction of the half nuts, the two buttons (3) slide along the shell (1) to drive the corresponding push rods (31) to apply force to the corresponding stop blocks (21), so that the two half nuts (2) slide along the shell (1), and the two half nuts are switched from a closed state to an open state;

The elastic elements (4) are arranged in pairs and symmetrically with the axis of the shell (1) as a symmetrical center, each elastic element (4) is correspondingly arranged between the outer circumferential wall of the corresponding half nut and the inner side wall of the shell, and each elastic element (4) applies elastic force to the corresponding half nut (2) so as to enable the two half nuts (2) to be switched from an open state to a closed state when the external force pressing the button is removed.

3. The lock nut as claimed in claim 1 or 2, further comprising: a locking cover (5) which is axially held in the housing (1) and can rotate relative to the housing around the axis of the locking cover, wherein the locking cover (5) is sleeved on the periphery of the two half nuts (2); when the locking cap (5) is turned about its axis to a locking position, a first inner wall portion (511) of the locking cap abuts against an outer circumferential wall of the half nut to lock the half nut in the closed state; when the locking cap (5) is rotated about its axis to the unlocking position, a gap is provided between the second inner wall portion (512) of the locking cap and the outer circumferential wall of the half nuts, so that the paired half nuts (2) can be opened relatively.

4. A locking nut as claimed in claim 3, characterized in that the inner wall (51) of the locking cap has a reducing contour, wherein the first inner wall portion (511) is configured as a small radius portion of the contour and the second inner wall portion (512) is configured as a large radius portion of the contour.

5. A lock nut as claimed in claim 3, characterized in that the lock cap (5) has an axially projecting hand-held portion (52).

6. The locking nut as claimed in claim 5, characterized in that the outer wall of the hand-held part (52) is provided with corrugations (521).

7. A locking nut as claimed in claim 3, characterized in that the inner wall of the housing (1) is provided with a limit groove (11), the locking cap (5) being held axially in the housing (1) by means of a limit washer (6) correspondingly provided in the limit groove (11).

8. A locking nut as claimed in claim 7, characterized in that the limit washer (6) is connected to the locking cap (5) so as to be able to rotate synchronously with the locking cap.

9. The lock nut as claimed in claim 1 or 2, characterized in that the housing (1) is provided with a first slide groove, the push button (3) being arranged in the first slide groove so as to be slidable along the first slide groove relative to the housing; and/or the inner side wall of the shell (1) is provided with a second chute, and the end part of the stop block (21) is arranged in the second chute so as to be capable of sliding relative to the shell along the second chute.

10. A locking nut as claimed in claim 1, characterized in that one of the two half-nuts is configured to slide relative to the housing (1) and the other half-nut is fixedly arranged relative to the housing, the centre of gravity of the locking nut lying in the direction of its axis.