Anti-falling chuck of jig saw

Abstract

The utility model discloses an anti-falling chuck of a jig saw, which belongs to the field of electric tools, solves the problem that a lock sleeve falls off due to excessive rotation, and adopts the technical scheme that the anti-falling chuck mainly comprises a reciprocating rod, the lock sleeve and a knob, the reciprocating rod is provided with a convex section, the lock sleeve is screwed on the convex section through threads, and the knob is arranged on the lock sleeve. The rotary knob is fixedly connected with the lock sleeve, a reset piece enabling the lock sleeve to be kept at the initial position trend is arranged between the lock sleeve and the lower end face of the protruding section, a limiting part located below the protruding section is arranged in the lock sleeve, and the limiting part abuts against the lower end face of the reciprocating rod when the lock sleeve is located at the initial position. The knob is provided with a limiting piece used for limiting the rotating stroke of the lock sleeve, and the limiting piece is matched with the top face of the protruding section for limiting when the lock sleeve is located at the maximum rotating angle position. The lock sleeve is mainly used for effectively preventing the lock sleeve from falling off due to excessive rotation.

Description

Technical Field

[0001] The utility model relates to the field of electric tools, in particular to an anti-dropping chuck of a jigsaw. Background Art

[0002] In the prior art, utility model patent CN217991145U discloses a quick chuck for a jigsaw blade, comprising a reciprocating rod for mounting a saw blade, a quick locking mechanism being threadedly connected to the reciprocating rod, the quick locking mechanism comprising a synchronously rotating lock sleeve and a rotating sleeve, the rotating sleeve being arranged outside the lock sleeve, two handles being symmetrically arranged on the rotating sleeve for facilitating the rotation of the rotating sleeve, a torsion spring being arranged at the end of the reciprocating rod threadedly connected to the lock sleeve, the rotating sleeve comprising a driving part and a limiting part, the driving part being arranged outside the threaded cavity, the limiting part being arranged outside the rotating cavity, the reverse force of the torsion spring can make the threaded cavity of the lock sleeve rotate back to the original position instantly clockwise, and when the saw blade needs to be installed or replaced, the rotating sleeve is rotated counterclockwise by the handle to drive the lock sleeve to rotate counterclockwise. However, the above device is only provided with a limiting part for limiting the lock sleeve in the initial position, and lacks a structure for limiting the lock sleeve in the counterclockwise rotation angle. When the rotation angle of the lock sleeve exceeds the stroke of the thread, the lock sleeve will fall off. Utility Model Content

[0003] The utility model aims to provide a jig saw anti-dropping chuck, which overcomes the problem in the prior art that a locking sleeve will drop off due to excessive rotation, and effectively prevents the locking sleeve from dropping off due to excessive rotation.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a curved saw anti-dropping chuck, comprising a reciprocating rod, a locking sleeve and a knob, the reciprocating rod is provided with a raised section, the locking sleeve is arranged on the raised section by threaded engagement, the knob is fixedly connected to the locking sleeve, a reset member is provided between the locking sleeve and the lower end surface of the raised section to keep the locking sleeve in an initial position, a limiting portion is provided in the locking sleeve below the raised section, the limiting portion abuts against the lower end surface of the reciprocating rod when the locking sleeve is in the initial position, a limiting member is provided on the knob for limiting the rotational stroke of the locking sleeve, and the limiting member cooperates with the top surface of the raised section to limit the position when the locking sleeve is in the maximum rotation angle position.

[0005] After adopting the above technical scheme, the utility model has the following advantages: the limiting portion abuts against the lower end surface of the reciprocating rod when the lock sleeve is in the initial position, and the knob is provided with a limiting member for limiting the rotational stroke of the lock sleeve. When the lock sleeve is in the maximum rotation angle position, the limiting member cooperates with the top surface of the raised section to limit the rotation angle of the lock sleeve on the reciprocating rod, thereby limiting the rotation angle of the lock sleeve on the reciprocating rod, preventing the lock sleeve from falling off due to excessive rotation, and ensuring that the lock sleeve moves within the rotational stroke range.

[0006] Furthermore, the limiter includes a limiter shaft, the knob is provided with a handle that is convenient for gripping, the upper end of the handle extends upward to form a connecting portion, the limiter shaft is mounted on the connecting portion, and the limiter shaft has a connecting end located above the raised section. The above-mentioned technical solution is adopted to provide a handle on the knob, which is convenient for gripping, thereby facilitating the rotation of the lock sleeve, and is less likely to slip when gripping. Secondly, the upper end of the handle extends upward to form a connecting portion, and the limiter shaft is mounted on the connecting portion, so there is no need to provide a separate mounting structure, making the knob more comfortable to grip.

[0007] Furthermore, the limit shaft is detachably connected to the connecting part. By adopting the above technical solution, the limit shaft and the connecting part are detachable, which is convenient for later maintenance and replacement.

[0008] Furthermore, the connection portion is provided with an installation cavity for installing the limit shaft, the limit shaft extends along the radial direction of the reciprocating rod, one end of the installation cavity is provided with a first opening for the limit shaft to extend toward the connection end, and the other end of the installation cavity is provided with a second opening for the limit shaft to move away from the connection end. The above technical solution is adopted, by setting the first opening, the limit shaft extends toward the connection end to limit the raised section, and the rotation angle of the lock sleeve on the reciprocating rod is limited to prevent the lock sleeve from falling off due to excessive rotation, and by setting the second opening, the limit shaft moves away from the connection end, the lock sleeve is unlocked, and the lock sleeve can be removed from the reciprocating rod.

[0009] Furthermore, the knob is provided with a handle that is convenient for gripping, and the upper end of the handle is extended to form a limiter, and part of the limiter is located above the raised section. Through the above technical solution, the limiter is formed by extending the handle, which is more convenient to process and has a more solid structure. Part of the limiter is located above the raised section and can cooperate with the top surface of the raised section to limit the rotation angle of the lock sleeve on the reciprocating rod, thereby preventing the lock sleeve from falling off due to excessive rotation.

[0010] Furthermore, a gap is provided between the end of the stopper facing the reciprocating rod and the reciprocating rod. Through the above technical solution, a gap is provided between the end of the stopper facing the reciprocating rod and the reciprocating rod, which effectively prevents the stopper from interfering with the reciprocating rod when the lock sleeve rotates within the rotation stroke.

[0011] Furthermore, at least two of the limiters are provided and arranged along the circumference of the reciprocating rod. Through the above technical solution, by providing multiple limiters, multi-point limit is formed, and the limit is more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings:

[0013] Figure 1 It is a structural schematic diagram of the anti-drop chuck of the jigsaw of the utility model;

[0014] Figure 2 For the utility model Figure 1 A magnified view of the structure at center A;

[0015] Figure 3 It is a cross-sectional view of the anti-dropout chuck of the jigsaw in the utility model (the locking sleeve is in the initial position);

[0016] Figure 4 For the utility model Figure 3 A magnified view of the structure at B in the middle;

[0017] Figure 5 It is a cross-sectional view of the anti-drop chuck of the jigsaw in the utility model (the locking sleeve is at the maximum rotation angle position);

[0018] In the figure, 1, reciprocating rod; 11, raised section; 2, locking sleeve; 21, limiting portion; 3, knob; 31, handle; 32, connecting portion; 33, mounting cavity; 34, first opening; 35, second opening; 4, reset member; 5, limiting member; 51, connecting end; 6, gap. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0020] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein.

[0021] It should be understood that in various embodiments of the present invention, the size of the serial number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0022] It should be understood that in the present invention, "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0023] It should be understood that in the present utility model, "plurality" refers to two or more than two. "And / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "Contains X, Y and Z", "Contains X, Y, Z" means that X, Y, and Z are all included, "Contains X, Y or Z" means that one of X, Y, and Z is included, and "Contains X, Y and / or Z" means that any one, any two, or any three of X, Y, and Z are included.

[0024] The following specific embodiments are used to describe the technical solution of the utility model in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0025] like Figures 1 to 5 As shown, the utility model provides an anti-dropping chuck for a curved saw, comprising a reciprocating rod 1, a locking sleeve 2 and a knob 3, the reciprocating rod 1 being provided with a raised section 11, the locking sleeve 2 being arranged on the raised section 11 by screwing, the knob 3 being fixedly connected to the locking sleeve 2, a reset member 4 for keeping the locking sleeve 2 in an initial position being provided between the locking sleeve 2 and the lower end surface of the raised section 11, a limiting portion 21 located below the raised section 11 being provided in the locking sleeve 2, the limiting portion 21 being in contact with the lower end surface of the reciprocating rod 1 when the locking sleeve 2 is in the initial position, a limiting member 5 for limiting the rotational travel of the locking sleeve 2 being provided on the knob 3, the limiting member 5 being limited in cooperation with the top surface of the raised section 11 when the locking sleeve 2 is in a maximum rotation angle position.

[0026] With such a design, the limiting portion 21 abuts against the lower end surface of the reciprocating rod 1 when the lock sleeve 2 is in the initial position, and the knob 3 is provided with a limiting piece 5 for limiting the rotational stroke of the lock sleeve 2. The limiting piece 5 cooperates with the top surface of the raised section 11 to limit the rotation angle of the lock sleeve 2 on the reciprocating rod 1 when the lock sleeve 2 is in the maximum rotation angle position, thereby limiting the rotation angle of the lock sleeve 2 on the reciprocating rod 1 and preventing the lock sleeve 2 from falling off due to excessive rotation, thereby ensuring that the lock sleeve 2 moves within the rotational stroke range. In the utility model, when the lock sleeve 2 is rotated to the maximum rotation angle position, the lock sleeve 2 is in the position for installing the blade, which is conducive to the smooth installation of the blade.

[0027] It can be understood that the reset member 4 can be a torsion spring, one end of which abuts against the lock sleeve 2 , and the other end of which abuts against the reciprocating rod 1 .

[0028] It should be noted that the limiting portion 21 is a limiting step, and the limiting step is fitted with the bottom surface and the side surface of the reciprocating rod 1 to limit the position.

[0029] It should be noted that the raised section 11 is provided with a threaded section, and the locking sleeve 2 is provided with a threaded matching section, and the locking sleeve 2 is connected to the raised section 11 through threaded matching of the threaded section and the threaded matching section. The raised section 11 and the reciprocating rod 1 are integrally formed.

[0030] It should be noted that when the locking sleeve 2 is in the initial position, the distance between the limiting member 5 and the raised section 11 is equal to the distance between the locking sleeve 2 and the reciprocating rod 1 during the rotation stroke.

[0031] Specifically, the limiting member 5 includes a limiting shaft, and a handle 31 is provided on the knob 3, which is convenient for gripping. The upper end of the handle 31 extends upward to form a connecting portion 32, and the limiting shaft is installed on the connecting portion 32 and is located above the raised section 11. The limiting shaft has a connecting end 51 located above the raised section 11. Such a design is convenient for gripping, thereby facilitating the rotation of the lock sleeve 2, and is not prone to slipping when gripping. Secondly, the upper end of the handle 31 extends upward to form the connecting portion 32, and the limiting shaft is installed on the connecting portion 32, so there is no need to set a separate mounting structure, making the knob 3 more comfortable to grip.

[0032] It should be noted that the axial projection of the connecting end 51 in the reciprocating rod 1 at least partially overlaps with the raised section 11 so as to form an abutment limit.

[0033] Since the limit shaft, locking sleeve 2 and knob 3 are prone to aging during long-term use, the limit shaft and the connecting part 32 are detachably connected for easy replacement. By such a design, the knob 3 and the locking sleeve 2 can be removed from the reciprocating rod 1 by removing the limit shaft, which is beneficial for later maintenance and replacement.

[0034] Specifically, the connection portion 32 is provided with an installation cavity 33 for installing the limiting shaft, the limiting shaft extends along the radial direction of the reciprocating rod 1, one end of the installation cavity 33 is provided with a first opening 34 for the limiting shaft to extend toward the connection end 51, and the other end of the installation cavity 33 is provided with a second opening 35 for the limiting shaft to move away from the connection end 51. In this design, by providing the first opening 34, the limiting shaft extends toward the connection end 51 to limit the protruding section 11, and the rotation angle of the lock sleeve 2 on the reciprocating rod 1 is limited to prevent the lock sleeve 2 from rotating excessively and falling off. By providing the second opening 35, the limiting shaft moves away from the connection end 51, the lock sleeve 2 is unlocked, and the lock sleeve 2 can be removed from the reciprocating rod 1.

[0035] It should be noted that the limiting shaft can be connected to the installation cavity 33 via a key, so that the limiting shaft can be more reliably connected.

[0036] It should be noted that the mounting cavity 33 is a long hole matched with the limiting shaft.

[0037] In order to prevent the limiting member 5 from interfering with the reciprocating rod 1 when the lock sleeve 2 rotates within the rotation stroke, a gap 6 is provided between the end of the locking limiting member 5 facing the reciprocating rod 1 and the reciprocating rod 1 .

[0038] In this embodiment, there is one limiting member 5 .

[0039] In other embodiments, at least two limiters may be provided and arranged along the circumference of the reciprocating rod. In this design, by providing multiple limiters, multi-point limit is formed, and the limit is more reliable. Preferably, two, three, four, etc. are provided.

[0040] In other embodiments, a handle is provided on the knob to facilitate gripping, and the upper end of the handle extends to form a stopper, and part of the stopper is located above the raised section. Such a design is more convenient to process and has a more solid structure.

[0041] It should be noted that the limit member is a retractable structure. When limiting is required, the limit member is extended and located above the protruding section. When limiting is not required, the limit member is retracted. The projection of the limit member on the axial direction of the reciprocating rod does not coincide with the projection of the protruding section on the axial direction of the reciprocating rod.

[0042] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A jig saw anti-drop chuck, comprising a reciprocating rod, a locking sleeve and a knob, wherein the reciprocating rod is provided with a raised section, the locking sleeve is arranged on the raised section by screwing, the knob is fixedly connected to the locking sleeve, a reset member is provided between the locking sleeve and the lower end surface of the raised section to keep the locking sleeve in an initial position, a limiting portion is provided in the locking sleeve below the raised section, and the limiting portion abuts against the lower end surface of the reciprocating rod when the locking sleeve is in the initial position, characterized in that: The knob is provided with a limiting member for limiting the rotational travel of the lock sleeve, and the limiting member cooperates with the top surface of the raised section to limit the position when the lock sleeve is at the maximum rotation angle position.

2. The anti-drop chuck for a jig saw according to claim 1, characterized in that: The limiting member includes a limiting shaft, and the knob is provided with a handle that is convenient for gripping. The upper end of the handle extends upward to form a connecting portion, and the limiting shaft is installed on the connecting portion. The limiting shaft has a connecting end located above the raised section.

3. The anti-drop chuck for a jig saw according to claim 2, characterized in that: The limiting shaft is detachably connected to the connecting portion.

4. The anti-drop chuck for a jig saw according to claim 3, characterized in that: The connecting portion is provided with an installation cavity for installing a limiting shaft, the limiting shaft extends along the radial direction of the reciprocating rod, one end of the installation cavity is provided with a first opening for the limiting shaft to extend toward the connecting end, and the other end of the installation cavity is provided with a second opening for the limiting shaft to move away from the connecting end.

5. The anti-drop chuck for a jig saw according to claim 1, characterized in that: The knob is provided with a handle which is convenient for gripping, the upper end of the handle is extended to form a limiting member, and part of the limiting member is located above the raised section.

6. The anti-drop chuck for a jig saw according to claim 1, characterized in that: A gap is provided between one end of the limiting member facing the reciprocating rod and the reciprocating rod.

7. The anti-drop chuck for a jig saw according to claim 1, characterized in that: There are at least two limit members arranged along the circumference of the reciprocating rod.

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