CN111128579A

CN111128579A - Self-locking switch and core drill

Info

Publication number: CN111128579A
Application number: CN202010017804.8A
Authority: CN
Inventors: 王友红; 曾宜; 李武雄
Original assignee: Hunan Weiping Technology Development Co ltd
Current assignee: Hunan Weiping Technology Development Co ltd
Priority date: 2020-01-08
Filing date: 2020-01-08
Publication date: 2020-05-08

Abstract

The invention provides a self-locking switch and a core drill, wherein the core drill is provided with the self-locking switch, the self-locking switch comprises an operating handle and a locking piece, the middle part of the operating handle is rotatably arranged, a working end is formed at one end, and an operating end is formed at the other end, the locking piece is positioned on a movement path of the working end and can move parallel to a rotating shaft of the operating handle, so that the locking piece is used for moving to the movement path of the working end along the direction parallel to the rotating shaft of the operating handle when the working end rotates to pass through the position of the locking piece, so as to limit the return of the working end, and a buckling structure is arranged between the operating handle and the locking piece, so that the locking piece is buckled and fixed with the operating handle. The core drill locking device can realize the state locking of the operating handle, has simple structure and reasonable design, does not lose efficacy due to the vibration of the core drill because the operating handle and the locking piece are locked with each other, and has stable and reliable work and strong practicability.

Description

Self-locking switch and core drill

Technical Field

The invention relates to the technical field of core drills, in particular to a self-locking switch and a core drill.

Background

The hydraulic core drill is widely applied to construction working conditions of emergency rescue, disaster relief, municipal construction, railways, roads, bridges and the like, is mainly used for drilling cement concrete products and reinforced concrete, and has the characteristics of high drilling efficiency, deep cutting and the like. When drilling, an operating handle (also called a trigger) of the hydraulic core drill needs to be pressed, and one end of the operating handle is enabled to prop against the valve rod through rotation of the operating handle to control the conduction of the oil circuit. However, in actual work, drilling of hole sites needs to be continued for a certain time, so that a worker usually needs to continuously press an operating handle to maintain the core drill, the working strength is high, and the design is not scientific and reasonable enough.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, on one hand, the invention provides a self-locking switch, which comprises an operating handle and a locking piece, wherein the middle part of the operating handle is rotatably arranged, a working end is formed at one end, an operating end is formed at the other end, the locking piece is positioned on a moving path of the working end and can move parallel to a rotating shaft of the operating handle, so that when the working end rotates to pass through the position of the locking piece, the locking piece moves to the moving path of the working end along the direction parallel to the rotating shaft of the operating handle to limit the return of the working end, and a buckling structure is arranged between the operating handle and the locking piece and is buckled and fixed with the operating handle when the locking piece moves to a return path of the working end.

According to the embodiment of the invention, at least the following technical effects are achieved:

adopt this self-locking switch, can control the work end through the operation end that rotates operating handle and carry out corresponding opening and stop, when the work end rotates suitable angle, promote the retaining member again and be located the rear of work end, can prevent operating handle reverse rotation to both can avoid the emergence of retaining member inefficacy problem through lock structure relatively fixed, and the practicality is strong.

According to some embodiments of the invention, a reset member is connected to the retaining member and is configured to maintain the retaining member in a normal state out of the path of movement of the working end.

According to some embodiments of the invention, the locking structure comprises a locking convex position arranged on the locking member and a locking concave position correspondingly arranged on the operating handle, and the locking member can be clamped into the locking concave position through the locking convex position to overcome the acting force of the resetting member.

On the other hand, the invention provides a core drill, which comprises a core drill main body, wherein the core drill main body is provided with a valve body, a valve rod and a handle, the valve rod is used for controlling the on-off of an oil circuit of the valve body, the handle is provided with an operating handle, a rotating shaft of the operating handle is positioned in the middle, a working end is formed at one end of the rotating shaft, an operating end is formed at the other end of the rotating shaft, the working end is abutted against the valve rod, the valve rod can be pushed to move to control the conduction of the oil circuit of the valve body when the operating end rotates under stress, a locking piece is arranged on a rotating path corresponding to the working end on the handle, the locking piece can move parallel to the rotating shaft of the operating handle so as to be moved to a moving path of the working end to limit the return of the working end when the working end rotates to pass through the position, the locking piece is used for being buckled and fixed with the operating handle when the locking piece moves to a return path of the working end.

this core drill can control the work end through the operating end that rotates operating handle and promote the valve rod, starts the work of core drill, because the valve rod has the automatic re-setting function, moves to the rear of work end through the retaining member, can prevent effectively that operating handle from being promoted by the valve rod and reseing, and then keeps the core drill to be in operating condition, need not the workman and continuously presses operating handle, reduces intensity of labour, and the practicality is strong.

According to some embodiments of the present invention, the handle is provided with a mounting hole, the locking member is inserted into the mounting hole, and one end of the locking member near the working end is provided with a first head portion, and the other end of the locking member is provided with a second head portion, the first head portion and the second head portion are both larger than the mounting hole in size, and the reset member is provided as a spring and sleeved on the locking member and located between the handle and the second head portion.

According to some embodiments of the invention, one end of the first head part close to the second head part is provided with a positioning surface, an angle formed between the positioning surface and the locking member is less than or equal to 90 °, and the operating handle is provided with an inclined surface matched with the positioning surface.

According to some embodiments of the present invention, the locking member is integrally formed with the first head, the locking member is screwed to the second head, and an end of the handle close to the second head is recessed to form a receiving cavity, the second head has a contour size matched with the receiving cavity, and the spring is located in the receiving cavity.

According to some embodiments of the invention, an end of the second head portion adjacent to the first head portion is always located in the accommodating cavity.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention is further illustrated with reference to the following figures and examples:

FIG. 1 is a schematic structural view of the self-locking switch;

FIG. 2 is an assembled cross-sectional view of the operating handle and locking member of the core drill;

FIG. 3 is an operational view of the operating handle of the core drill;

fig. 4 is an exploded view of a core drill.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1, an embodiment of the present invention provides a self-locking switch, including an operating handle 100 and a locking member 200, wherein a middle portion of the operating handle 100 is rotatably disposed to form a working end 102 at one end and an operating end 101 at the other end, the locking member 200 is located on a moving path of the working end 102 and is movable parallel to a rotating shaft of the operating handle 100, for moving to the moving path of the working end 102 along a direction parallel to the rotating shaft of the operating handle 100 when the working end 102 rotates past a position of the locking member 200 to limit a return of the working end 102, and a locking structure is disposed between the operating handle 100 and the locking member 200, for being locked and fixed with the operating handle 100 when the locking member 200 moves to a return path of the working end 102.

To improve the convenience of operation, it is preferable that a restoring member for keeping the locker 200 withdrawn from the moving path of the working end 102 in a normal state is attached to the locker 200. This allows automatic reset by the reset member after the locker 200 is separated from the operating handle 100 without a worker manually moving the locker 200 out of the moving path of the working end 102.

In one embodiment, the latching structure includes a latching protrusion disposed on the locking member 200 and a latching recess correspondingly disposed on the operating handle 100, and the locking member 200 can be latched into the latching recess through the latching protrusion to overcome the force of the restoring member.

Obviously, adopt this self-locking switch, can control work end 102 through the operation end 101 of rotating operating handle 100 and carry out corresponding opening and stop, when work end 102 rotated suitable angle, promote retaining member 200 and be located the rear of work end 102 again, can prevent operating handle 100 antiport to both are through lock structure relatively fixed, can avoid the emergence of retaining member 200 inefficacy problem, and the practicality is strong.

Referring to fig. 1 to 4, an embodiment of the present invention provides a core drill, including a core drill body 500, the core drill body 500 is provided with a valve body 502, a valve rod 501 and a handle 400, the valve rod 501 is used for controlling the on-off of an oil path of the valve body 502, the handle 400 is provided with an operating handle 100, a rotating shaft of the operating handle 100 is located in the middle part, a working end 102 is formed at one end, an operating end 101 is formed at the other end, the working end 102 abuts against the valve rod 501, the operating end 101 can push the valve rod 501 to move when being rotated by a force so as to control the conduction of the oil path of the valve body 502, a locking member 200 is arranged on a rotating path corresponding to the working end 102 on the handle 400, the locking member 200 can move parallel to the rotating shaft of the operating handle 100 so as to move to the moving path of the working end 102 when the working end 102 rotates past the position of the locking member 200 to limit the return, for snap-fit securement with operating handle 100 as retaining member 200 moves on its return path to working end 102.

Since the main structure of the core drill (such as the specific structure of the valve body 502, the connection between the valve body 502 and the hydraulic motor, the installation of the drill bit, etc.) is common knowledge and is not the improvement point of the core drill in this embodiment, the structure of this part is not described or not described too much.

Adopt the core drill of above-mentioned structure to control work end 102 through the operation end 101 of rotating operating handle 100 and push valve rod 501, start the work of core drill, because valve rod 501 has the automatic re-setting function, move to the rear of work end 102 through retaining member 200, can prevent effectively that operating handle 100 from being promoted by valve rod 501 and reset, and then keep the core drill to be in operating condition, need not the workman and continuously press operating handle 100, reduce intensity of labour, the practicality is strong.

Preferably, a reset member is coupled to retaining member 200 to maintain retaining member 200 in a normal position out of the path of movement of working end 102. The buckling structure comprises a buckling convex position arranged on the locking member 200 and a buckling concave position correspondingly arranged on the operating handle 100, and the locking member 200 can be clamped into the buckling concave position through the buckling convex position to overcome the acting force of the reset member.

As shown in fig. 2 to 4 in particular, in one embodiment, the handle 400 is of a housing structure and has a mounting portion connected to the core drill body 500 and a ring-shaped holding portion provided on the mounting portion, a cylindrical pin structure is provided in the mounting portion of the handle 400, the operating handle 100 is rotatably mounted on the pin structure, and the operating end 101 extends in the ring-shaped holding portion. The handle 400 is characterized in that a cylindrical accommodating cavity is formed in the side wall of one side of the mounting part of the handle 400 in an inwards concave mode, an axis parallel pin shaft structure of the accommodating cavity is formed in the bottom of the accommodating cavity, a mounting hole matched with the locking part 200 is formed in the bottom of the accommodating cavity, the locking part 200 is a cylinder and penetrates through the mounting hole, a first head 201 is formed at one end of the locking part 200 in the handle 400, a second head 202 is installed at the other end of the locking part, and a reset part is a spring 300 which is sleeved on the locking part 200 and located in the accommodating. The first head 201 is of a flat cylindrical structure, a buckling convex position is formed by the first head 201, and buckling limitation can be realized by directly clamping the side surface of the working end 102 deviating from the second head 202 through the first head 201.

Considering that the axial dimension of the operating handle 100 along the pin structure is generally large, if the first head 201 is directly clamped to the side of the working end 102 to realize the buckling limit, the distance that the locking member 200 needs to move is large, therefore, it is preferable to provide an arc-shaped concave structure at the end of the working end 102 away from the valve rod 501, and a rib plate 103 is formed at a position close to the second head 202 by the arc-shaped concave structure, and the arc-shaped profile of the arc-shaped concave structure is matched with the first head 201. Namely, the buckling concave position is formed by the arc concave structure.

Second head 202 is of such a length that its end adjacent to first head 201 is always located in the receiving cavity throughout the movement of retaining member 200.

With the core drill configured as described above, the locking member 200 is normally out of the rotational path of the working end 102 of the operating handle 100 due to the action of the spring 300.

When starting, press the control end of operating handle 100 through the workman, drive work end 102 and push valve rod 501 and start the work of core drill, the control end of operating handle 100 just passes through retaining member 200 place this moment, the workman only needs to press second head 202 from the outside, promote the first head 201 of retaining member 200 suitable distance to arc indent structure can loosen the control end and the second head 202 of operating handle 100, operating handle 100 is gyration under the reset action of valve rod 501, but because the effect of retaining member 200 and can't be gyration, consequently, can keep core drill in operating condition, retaining member 200 also can reset under the effect of spring 300 simultaneously, but because the floor 103 blocks first head 201, consequently, retaining member 200 also can't reset, both are in mutual locking state, make core drill because of the switch auto-lock stable maintenance is in the open mode.

When needing to close, only need press operating end 101 of operating handle 100 once more and can drive work end 102 and keep away from retaining member 200 for floor 103 and first head 201 separate, after both separate, retaining member 200 withdraws from the rotation route of work end 102 under the reset action of spring 300, later unclamp operating end 101 and can realize the stopping of reseing and the core drill of operating handle 100.

In conclusion, the self-locking switch and the core drill disclosed by the invention can realize the state locking of the operating handle 100, have simple structure and reasonable design, and can not fail due to the vibration of the core drill because the operating handle 100 and the locking piece 200 are locked with each other, thereby having stable and reliable work and strong practicability.

In addition, a positioning surface can be arranged at one end of the first head part 201 close to the second head part 202, an angle between the positioning surface and the locking member 200 is less than 90 degrees, and an inclined surface matched with the positioning surface is arranged on the operating handle 100.

In this structure, an acting force for limiting the rotation of the working end 102 can be formed between the positioning surface and the inclined surface, so that when the core drill needs to be closed, the second head 202 needs to be pressed first, then the operating handle 100 needs to be rotated, and then the core drill needs to be reset in sequence.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The utility model provides a self-locking switch, its characterized in that includes operating handle and retaining member, the rotatable setting in middle part of operating handle and form the operating end in one end, another end formation operating end, the retaining member is located but on the motion path of operating end parallel to operating handle's pivot motion is used for the operating end rotates the process along being parallel to during the position at retaining member place operating handle's pivot direction moves extremely on the motion path of operating end and restriction the operating end returns, and operating handle with be provided with the lock structure between the retaining member, be used for the retaining member move extremely when on the return stroke path of operating end with the operating handle lock is fixed.

2. The self-locking switch of claim 1, wherein a reset member is coupled to the locking member, the reset member being configured to keep the locking member normally exiting the path of movement of the working end.

3. The self-locking switch of claim 2, wherein the locking structure comprises a locking convex portion disposed on the locking member and a locking concave portion correspondingly disposed on the operating handle, and the locking member can be locked into the locking concave portion through the locking convex portion to overcome the acting force of the reset member.

4. A core drill is characterized by comprising a core drill main body, wherein the core drill main body is provided with a valve body, a valve rod and a handle, the valve rod is used for controlling the on-off of an oil circuit of the valve body, an operating handle is arranged on the handle, a rotating shaft of the operating handle is positioned in the middle, a working end is formed at one end of the rotating shaft, an operating end is formed at the other end of the rotating shaft, the working end is abutted against the valve rod, the valve rod can be pushed to move when the operating end rotates under stress to control the conduction of the oil circuit of the valve body, a locking piece is arranged on a rotating path corresponding to the working end on the handle and can move parallel to the rotating shaft of the operating handle so as to be used for moving to the moving path of the working end when the working end rotates to pass through the position of the locking piece to limit the return of the working end, and a, the locking piece is used for being buckled and fixed with the operating handle when the locking piece moves to a return path of the working end.

5. The core drill as claimed in claim 4, characterized in that a reset piece is connected to the locking piece, and the reset piece is used for keeping the locking piece to normally exit from the movement path of the working end.

6. The core drill according to claim 5, wherein the locking structure comprises a locking convex portion arranged on the locking member and a locking concave portion correspondingly arranged on the operating handle, and the locking member can be clamped into the locking concave portion through the locking convex portion to overcome the acting force of the reset member.

7. The core drill according to claim 6, wherein the handle is provided with a mounting hole, the locking member is arranged in the mounting hole in a penetrating manner, a first head is arranged at one end of the locking member close to the working end, a second head is arranged at the other end of the locking member, the first head and the second head are both larger than the mounting hole in size, and the reset member is arranged as a spring and sleeved on the locking member and is positioned between the handle and the second head.

8. The core drill according to claim 7, wherein a positioning surface is arranged at one end of the first head part close to the second head part, an angle formed between the positioning surface and the locking member is less than or equal to 90 degrees, and an inclined surface matched with the positioning surface is arranged on the operating handle.

9. The core drill according to claim 7, wherein the locking member is integrally formed with the first head, the locking member is in threaded connection with the second head, an accommodating cavity is formed in an end of the handle close to the second head, the accommodating cavity is formed in a concave manner, the contour dimension of the second head is matched with that of the accommodating cavity, and the spring is located in the accommodating cavity.

10. The core drill as recited in claim 9, wherein an end of the second head portion adjacent to the first head portion is located within the receiving chamber at all times.