Bottom plate anti-loosening adjusting mechanism of jig saw

Abstract

The utility model discloses a bottom plate anti-loose adjusting mechanism of a jig saw, a bottom plate is connected with a locking bolt, an anti-loose adjusting assembly is arranged between the bottom plate and the locking bolt, the anti-loose adjusting assembly comprises a pressing plate, a locking plate and a sunk screw, the pressing plate is provided with through holes and threaded holes at intervals, the lower end of the locking bolt is connected with a rotation stopping block in a rotation stopping mode, and the locking plate is connected with the locking block. The rotation stopping block is connected to the locking plate in a rotation stopping mode, the sunk screw penetrates through the locking plate and then is in threaded connection with the threaded hole, a protruding ring is arranged at the lower end of the locking bolt, and after the sunk screw is screwed, the locking plate enables the rotation stopping block to be connected to the lower end face of the protruding ring in a pressing mode, the upper end face of the protruding ring is connected to the lower end face of the bottom plate in a pressing mode, and therefore rotation stopping fixed connection of the locking bolt and the pressing plate is achieved. According to the jig saw, the locking bolt and the bottom plate are fixedly connected in a rotation stopping mode through cooperation of the anti-loosening adjusting assembly and the rotation stopping block, the phenomenon that the bottom plate is loosened due to rotation of the locking bolt is avoided, and the use safety of the jig saw is improved.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, and in particular to a base plate anti-loosening adjustment mechanism for a jigsaw. Background Technology

[0002] A jigsaw is an electric tool that cuts materials through the reciprocating motion of a saw blade. It is widely used for straight or curved processing of materials such as wood, metal, and plastic. Its core advantage lies in its flexible and adjustable baseplate structure, which can adapt to different angles and working conditions. As a key component connecting the machine body and the baseplate, the quick-clamp structure of the baseplate plays a crucial role in fixing the baseplate, transmitting power, and adjusting the cutting angle. This structure typically consists of locking bolts, pressure plates, washers, and locking screws. The jigsaw's body includes a gearbox; the quick-clamp structure of the baseplate allows for convenient adjustment of the gearbox angle relative to the baseplate, while ensuring a reliable connection between the baseplate and gearbox during cutting.

[0003] For example, a jigsaw and its quick-clamp structure for the base plate are disclosed in Chinese Utility Model Patent (Authorization Announcement No.: CN208276285U). The base plate includes a base plate with an adjustment hole. The base plate is connected to the jigsaw's gearbox via a connecting assembly. The connecting assembly includes a self-locking component and a locking bolt. The self-locking component cooperates with the base plate to restrict the rotation of the locking bolt. The self-locking component includes a pressure plate and a second countersunk screw. The second countersunk screw passes through a first washer and is threaded into the threaded hole. After the second countersunk screw is tightened, the first washer presses against the outer surface of the head of the locking bolt, thereby fixing the locking bolt to the pressure plate.

[0004] However, the jigsaw and its quick-clamp structure disclosed in the prior art have the following drawbacks: In actual working scenarios, jigsaws are often subjected to high-frequency vibration. Under these conditions, the pressing fit between the first washer and the head end face of the locking bolt is prone to failure. This failure can cause the locking bolt to rotate, which in turn can further loosen the pressure plate, adversely affecting the stable operation and reliability of the jigsaw.

[0005] Therefore, it is necessary to improve the existing technology. Utility Model Content

[0006] The purpose of this utility model is to address the defects and shortcomings of the existing technology by providing a bottom plate anti-loosening adjustment mechanism for a jigsaw. The locking bolt and the pressure plate are fixedly connected to prevent rotation through the cooperation of the anti-loosening adjustment component and the anti-rotation block, thus preventing the pressure plate from loosening during use.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A base plate anti-loosening adjustment mechanism for a jigsaw includes a locking bolt connected to the base plate, and an anti-loosening adjustment assembly between the base plate and the locking bolt. The anti-loosening adjustment assembly includes a pressure plate, a locking plate, and a countersunk screw. The pressure plate has through holes and threaded holes spaced apart. The locking bolt passes through the through holes and the base plate in sequence and is connected to a wrench so that the upper end face of the pressure plate presses against the lower end face of the base plate. The wrench has a locking hole, and a nut is connected to the locking bolt to prevent rotation. The nut is threadedly connected to the locking bolt. The lower end of the locking bolt is connected to an anti-rotation block, which is connected to the locking plate to prevent rotation. The countersunk screw passes through the locking plate and is threadedly connected to the threaded hole. The lower end of the locking bolt has a convex ring. When the countersunk screw is tightened, the locking plate presses the anti-rotation block against the lower end face of the convex ring, and the upper end face of the convex ring presses against the lower end face of the base plate, thereby achieving a fixed anti-rotation connection between the locking bolt and the pressure plate.

[0009] Furthermore, the lower end of the locking bolt is provided with a polygonal connecting part, and the anti-rotation block is provided with a polygonal groove that corresponds to and cooperates with the polygonal connecting part. The locking bolt and the anti-rotation block achieve anti-rotation connection through the cooperation of the polygonal connecting part and the polygonal groove.

[0010] Furthermore, the outer peripheral wall of the anti-rotation block is provided with an outer toothed ring, and the locking plate is provided with an inner toothed groove that corresponds to and engages with the outer toothed ring. The anti-rotation block and the locking plate achieve anti-rotation connection through the engagement of the outer toothed ring and the inner toothed groove.

[0011] Furthermore, both the anti-rotation block and the internal tooth groove are conical in shape, with the upper diameter being larger than the lower diameter.

[0012] Furthermore, the base plate has an adjustment hole, through which the locking bolt is connected to a wrench.

[0013] Furthermore, the base plate includes a first plate and a second plate that are detachably connected. The first plate has an upwardly raised arched portion, and the adjustment hole is disposed on the arched portion and extends along the width direction of the arched portion.

[0014] Furthermore, the lower end face of the pressure plate is provided with an arc-shaped protrusion. When the countersunk screw is tightened, the pressure plate presses against the upper end face of the locking plate through the arc-shaped protrusion.

[0015] Furthermore, the lower end face of the locking plate is provided with a countersunk hole.

[0016] The beneficial effects of this utility model after adopting the above structure are as follows: The base plate anti-loosening adjustment mechanism of the jigsaw described in this utility model has a locking bolt connected to the base plate, and an anti-loosening adjustment component is provided between the base plate and the locking bolt. The anti-loosening adjustment component includes a pressure plate, a locking plate, and a countersunk screw. The pressure plate has through holes and threaded holes spaced apart. The lower end of the locking bolt is connected to an anti-rotation block, which is connected to the locking plate. The countersunk screw passes through the locking plate and is threadedly connected to the threaded hole. The lower end of the locking bolt is provided with a convex ring. When the countersunk screw is tightened, the locking plate presses the anti-rotation block against the lower end face of the convex ring, and the upper end face of the convex ring presses against the lower end face of the base plate, so as to realize the anti-rotation fixed connection between the locking bolt and the pressure plate. This invention achieves a fixed connection between the locking bolt and the base plate by cooperating with the anti-loosening adjustment component and the anti-rotation block. When the cutting angle of the base plate is locked, the locking plate cooperates with the locking bolt through the anti-rotation block to prevent the base plate from loosening due to the rotation of the locking bolt, thus improving the safety of using the jigsaw. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0020] Figure 3 This is the utility model Figure 2 Enlarged schematic diagram of the structure at point A;

[0021] Figure 4 This is an exploded view of the overall structure of this utility model;

[0022] Figure 5 This is a three-dimensional schematic diagram of the pressure plate of this utility model;

[0023] Figure 6 This is a three-dimensional schematic diagram of the locking bolt of this utility model;

[0024] Figure 7 This is a three-dimensional schematic diagram of the anti-rotation block of this utility model;

[0025] Figure 8 This is a three-dimensional schematic diagram of the locking plate of this utility model;

[0026] Figure 9 This is a three-dimensional schematic diagram of the first plate of this utility model.

[0027] Figures 1 to 9 The winning number is:

[0028] 1. Base plate; 11. Adjustment hole; 12. First plate; 121. Arched part; 13. Second plate; 2. Locking bolt; 21. Raised ring; 22. Polygonal connecting part; 3. Anti-loosening adjustment component; 31. Pressure plate; 311. Through hole; 312. Threaded hole; 313. Arc-shaped protrusion; 32. Locking plate; 321. Internal tooth groove; 322. Countersunk hole; 33. Countersunk screw; 4. Wrench; 41. Snap-fit ​​hole; 5. Anti-rotation block; 51. Polygonal groove; 52. External toothed ring; 6. Nut. Detailed Implementation

[0029] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0030] In the description of this utility model, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, the term "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] In this utility model, unless otherwise explicitly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact, or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this invention are for illustrative purposes only and do not represent the only possible implementation.

[0035] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] like Figures 1 to 9As shown, a base plate anti-loosening adjustment mechanism for a jigsaw includes a base plate 1 with a locking bolt 2 connected to it. An anti-loosening adjustment assembly 3 is provided between the base plate 1 and the locking bolt 2. The anti-loosening adjustment assembly 3 includes a pressure plate 31, a locking plate 32, and a countersunk screw 33. The pressure plate 31 has through holes 311 and threaded holes 312 spaced apart. The locking bolt 2 passes through the through holes 311 and the base plate 1 sequentially and is connected to a wrench 4, so that the upper end face of the pressure plate 31 presses against the lower end face of the base plate 1. The wrench 4 has a locking hole 41, and a non-rotating component is connected within the locking hole 41. Nut 6 is threadedly connected to locking bolt 2. The lower end of locking bolt 2 is connected to anti-rotation block 5, which is anti-rotationally connected to locking plate 32. Countersunk screw 33 passes through locking plate 32 and is threadedly connected to threaded hole 312. The lower end of locking bolt 2 is provided with protruding ring 21. When countersunk screw 33 is tightened, locking plate 32 presses anti-rotation block 5 against the lower end face of protruding ring 21, and the upper end face of protruding ring 21 presses against the lower end face of base plate 1, so as to realize the anti-rotation fixed connection between locking bolt 2 and pressure plate 31.

[0037] Based on the above embodiments, this utility model provides a base plate anti-loosening adjustment mechanism for a jigsaw. A locking bolt 2 is connected to the base plate 1, and an anti-loosening adjustment component 3 is provided between the base plate 1 and the locking bolt 2. The anti-loosening adjustment component 3 includes a pressure plate 31, a locking plate 32, and a countersunk screw 33. The pressure plate 31 has through holes 311 and threaded holes 312 spaced apart. The lower end of the locking bolt 2 is connected to an anti-rotation block 5, which is connected to the locking plate 32. The countersunk screw 33 passes through the locking plate 32 and is threaded into the threaded hole 312. The lower end of the locking bolt 2 is provided with a convex ring 21. When the countersunk screw 33 is tightened, the locking plate 32 presses the anti-rotation block 5 against the lower end face of the convex ring 21, and the upper end face of the convex ring 21 presses against the lower end face of the base plate 1, so as to realize the anti-rotation fixed connection between the locking bolt 2 and the pressure plate 31. This utility model achieves a fixed anti-rotation connection between the locking bolt 2 and the base plate 1 through the cooperation of the anti-loosening adjustment component 3 and the anti-rotation block 5. When the cutting angle of the base plate 1 is locked, the locking plate 32 achieves anti-rotation cooperation with the locking bolt 2 through the anti-rotation block 5, which prevents the base plate 1 from loosening due to the rotation of the locking bolt 2, thereby improving the safety of using the jigsaw.

[0038] In this embodiment, as Figure 2As shown, the installation process of the base plate 1 is as follows: The locking bolt 2 is passed through the through hole 311 of the pressure plate 31 and the adjustment hole 11 of the base plate 1, and then threadedly connected to the nut 6 inside the wrench 4. The locking bolt 2 is tightened to ensure a tight fit between the pressure plate 31 and the base plate 1, thus guaranteeing the connection strength and stability of the pressure plate 31 and the base plate 1. Then, the countersunk screw 33 is passed through the locking plate 32 and threadedly connected to the threaded hole 312 of the pressure plate 31, so that one end of the locking plate 32 presses the anti-rotation block 5 against the lower end of the convex ring 21. On the other side, the other end of the locking plate 32 presses against the arc-shaped protrusion 313 of the pressure plate 31, thereby achieving a fixed connection between the locking bolt 2, the locking plate 32, and the pressure plate 31. The outer toothed ring 52 of the anti-rotation block 5 engages with the inner toothed groove 321 of the locking plate 32, and the polygonal connecting part 22 of the locking bolt 2 inserts into the polygonal groove 51, thereby achieving an anti-rotation connection between the locking bolt 2, the locking plate 32, and the pressure plate 31, preventing the base plate 1 from loosening due to the rotation of the locking bolt 2. The angle adjustment process of the base plate 1 is as follows: loosen the wrench 4, and the nut 6, which engages with the anti-rotation engagement hole 41 of the wrench 4, rotates with the wrench 4. The locking bolt 2 moves downward under the drive of the nut 6, causing the base plate 1 to separate from the gearbox of the jigsaw. Adjust the base plate 1 to a suitable angle, and then tighten the wrench 4 to re-fix the base plate 1. During the adjustment process, the anti-loosening adjustment component 3 moves up and down synchronously with the locking bolt 2.

[0039] As another preferred embodiment of this utility model, the lower end of the locking bolt 2 is provided with a polygonal connecting portion 22, and the anti-rotation block 5 is provided with a polygonal groove 51 corresponding to the polygonal connecting portion 22. The locking bolt 2 and the anti-rotation block 5 achieve anti-rotation connection through the cooperation of the polygonal connecting portion 22 and the polygonal groove 51. The outer peripheral wall of the anti-rotation block 5 is provided with an external toothed ring 52, and the locking plate 32 is provided with an internal toothed groove 321 corresponding to the external toothed ring 52. The anti-rotation block 5 and the locking plate 32 achieve anti-rotation connection through the cooperation of the external toothed ring 52 and the internal toothed groove 321. Both the anti-rotation block 5 and the internal toothed groove 321 are conical in shape, and the diameter of the upper end is larger than the diameter of the lower end. In this embodiment, as... Figures 6 to 8 As shown, the locking bolt 2 and the anti-rotation block 5 are connected to prevent rotation through the engagement of the polygonal connecting part 22 and the polygonal groove 51. The anti-rotation block 5 and the locking plate 32 are connected to prevent rotation through the engagement of the outer toothed ring 52 and the inner toothed groove 321. This ensures that the locking plate 32 is engaged with the locking bolt 2 through the anti-rotation block 5, preventing the base plate 1 from loosening due to the rotation of the locking bolt 2, thus improving the safety of using the jigsaw. In this embodiment, both the anti-rotation block 5 and the inner toothed groove 321 are conical, with the upper diameter being larger than the lower diameter. This allows the conical anti-rotation block 5 to be tightly pressed onto the convex ring 21 by the conical inner toothed groove 321 when the locking plate 32 presses it against the convex ring 21, improving the reliability of the pressing between the locking plate 32 and the base plate 1.

[0040] In another preferred embodiment of this utility model, the base plate 1 has an adjustment hole 11, and the locking bolt 2 passes through the adjustment hole 11 and is connected to the wrench 4. The base plate 1 includes a first plate body 12 and a second plate body 13 that are detachably connected. The first plate body 12 has an upwardly raised arched portion 121, and the adjustment hole 11 is disposed on the arched portion 121 and extends along the width direction of the arched portion 121. In this embodiment, as... Figure 4 As shown, the base plate 1 has a split structure, where the first plate 12 is used to connect with the gearbox of the jigsaw, and the second plate 13 is used to contact the workpiece during use. In this embodiment, the gearbox (not shown) is part of the jigsaw body and is the core transmission component of the jigsaw. Its main function includes realizing power conversion and transmission through a gear set, that is, changing the high-speed, low-torque power output by the motor to a low-speed, high-torque power suitable for the saw blade. Structurally, as a core structural component used to connect the jigsaw body and the base plate 1, the gearbox is located at the top of the base plate 1. The bottom of the gearbox is provided with an arc-shaped surface that matches the arched portion 121 of the first plate 12, wherein the curvature of the arc-shaped surface is the same as that of the arched portion 121. By cooperating with the arched portion 121, the processing angle of the base plate 1 can be effectively adjusted. The second plate 13 is provided with a clearance hole at the position corresponding to the locking bolt 2, which allows the locking bolt 2 to smoothly enter the interior of the arched portion 121, thereby making the installation more convenient.

[0041] As another preferred embodiment of this utility model, the lower end face of the pressure plate 31 is provided with an arc-shaped protrusion 313. When the countersunk screw 33 is tightened, the pressure plate 31 presses against the upper end face of the locking plate 32 through the arc-shaped protrusion 313. In this embodiment, as... Figure 3 and Figure 5 As shown, when the countersunk screw 33 is tightened, one end of the locking plate 32 presses the anti-rotation block 5 against the lower end face of the convex ring 21, and the other end of the locking plate 32 presses against the arc-shaped protrusion 313 of the pressure plate 31, thereby realizing the fixed connection between the locking bolt 2, the locking plate 32 and the pressure plate 31.

[0042] As another preferred embodiment of this utility model, the lower end face of the locking plate 32 is provided with a countersunk hole 322. In this embodiment, as... Figure 8 As shown, the countersunk screw 33 is set inside the countersunk hole 322 and is fixedly connected to the first plate 12. This structure can ensure the connection strength between the first plate 12 and the second plate 13 and ensure smooth use. On the other hand, it avoids the countersunk screw 33 being exposed and affecting the actual use requirements.

[0043] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. A base plate anti-loosening adjustment mechanism for a jigsaw, wherein a locking bolt (2) is connected to the base plate (1), and an anti-loosening adjustment assembly (3) is provided between the base plate (1) and the locking bolt (2). The anti-loosening adjustment assembly (3) includes a pressure plate (31), a locking plate (32), and a countersunk screw (33). The pressure plate (31) is provided with through holes (311) and threaded holes (312) spaced apart. The locking bolt (2) passes through the through holes (311) and the base plate (1) in sequence and is connected to a wrench (4) so ​​that the upper end face of the pressure plate (31) presses against the lower end face of the base plate (1). The wrench (4) is provided with a snap-fit ​​hole (41), and a nut (6) is connected in the snap-fit ​​hole (41) to prevent rotation. The nut (6) is threadedly connected to the locking bolt (2). The mechanism is characterized in that: The lower end of the locking bolt (2) is connected to an anti-rotation block (5), which is connected to the locking plate (32). The countersunk screw (33) passes through the locking plate (32) and is threaded into the threaded hole (312). The lower end of the locking bolt (2) is provided with a convex ring (21). When the countersunk screw (33) is tightened, the locking plate (32) presses the anti-rotation block (5) against the lower end face of the convex ring (21), and the upper end face of the convex ring (21) presses against the lower end face of the base plate (1) to achieve the anti-rotation fixed connection between the locking bolt (2) and the pressure plate (31).

2. The anti-loosening adjustment mechanism for the base plate of a jigsaw according to claim 1, characterized in that: The lower end of the locking bolt (2) is provided with a polygonal connecting part (22), and the anti-rotation block (5) is provided with a polygonal groove (51) that corresponds to and cooperates with the polygonal connecting part (22). The locking bolt (2) and the anti-rotation block (5) are connected to prevent rotation through the cooperation of the polygonal connecting part (22) and the polygonal groove (51).

3. The anti-loosening adjustment mechanism for the base plate of a jigsaw according to claim 1 or 2, characterized in that: The outer peripheral wall of the anti-rotation block (5) is provided with an outer toothed ring (52), and the locking plate (32) is provided with an inner toothed groove (321) that corresponds to and cooperates with the outer toothed ring (52). The anti-rotation block (5) and the locking plate (32) are connected to prevent rotation by the cooperation of the outer toothed ring (52) and the inner toothed groove (321).

4. The anti-loosening adjustment mechanism for the base plate of a jigsaw according to claim 3, characterized in that: Both the anti-rotation block (5) and the internal tooth groove (321) are conical in shape, with the upper diameter being larger than the lower diameter.

5. The anti-loosening adjustment mechanism for the base plate of a jigsaw according to claim 1, characterized in that: The base plate (1) has an adjustment hole (11), and the locking bolt (2) passes through the adjustment hole (11) and is connected to the wrench (4).

6. The anti-loosening adjustment mechanism for the base plate of a jigsaw according to claim 5, characterized in that: The base plate (1) includes a first plate (12) and a second plate (13) that are detachably connected. The first plate (12) has an upwardly raised arched portion (121). The adjustment hole (11) is provided on the arched portion (121) and extends along the width direction of the arched portion (121).

7. The anti-loosening adjustment mechanism for the base plate of a jigsaw according to claim 1, characterized in that: The lower end face of the pressure plate (31) is provided with an arc-shaped protrusion (313). When the countersunk screw (33) is tightened, the pressure plate (31) presses against the upper end face of the locking plate (32) through the arc-shaped protrusion (313).

8. The anti-loosening adjustment mechanism for the base plate of a jigsaw according to claim 1, characterized in that: The lower end face of the locking plate (32) is provided with a countersunk hole (322).

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