Angle adjusting mechanism of miter saw

Abstract

The utility model discloses an angle adjusting mechanism of a miter saw, which comprises a base, a rotating seat is arranged on the base, a positioning plate is arranged at the top of the rotating seat, and a plurality of locking holes are formed in the positioning plate; the supporting arm is rotationally arranged on the rotating seat, a cutting working head is connected to the supporting arm, and a guide structure is formed on the top of the supporting arm; the angle adjusting mechanism is arranged on the supporting arm and comprises an adjusting knob, a connecting rod, a connecting plate and a lock pin, the adjusting knob is rotationally connected to the first end of the connecting rod, the guide structure is formed on the edge of the connecting rod, the middle of the connecting plate is rotationally arranged on the supporting arm, and the lock pin is arranged on the connecting plate. One end of the connecting plate slides at the second end of the connecting rod, the other end of the connecting plate is hinged to the lock pin, the lock pin is connected with the locking hole in an inserted mode to lock the supporting arm, and the lock pin is sleeved with a spring for resetting of the lock pin.

Description

Technical Field

[0001] This application relates to the field of cutting tool technology, and in particular to an angle adjustment mechanism for a bevel saw. Background Technology

[0002] The bevel saw, also known as an angled saw, bevel cutter, or multi-angle cutter, is a power tool widely used in wood processing, building decoration, and other fields. Its angle adjustment mechanism is used to adjust the left and right angles of the support arm and the cutting table relative to the horizontal plane to achieve bevel cutting.

[0003] The existing angle adjustment mechanism of oblique cutting saws or cutting tools is generally manually operated by directly manipulating the locking pin, which is unlocked or locked by inserting and pulling it into the locking hole. The locking hole and locking pin are usually located at the bottom of the support arm. Each time the position is adjusted, the position of the locking pin and locking hole must be felt, which is inconvenient and cannot be blindly inserted.

[0004] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is the closest prior art to this application. Summary of the Invention

[0005] Based on this, this application provides an angle adjustment mechanism for a bevel saw to solve one of the aforementioned technical problems.

[0006] The technical solution adopted by this application to solve its technical problem is: an angle adjustment mechanism for a slant saw, comprising: a base, on which a rotating seat is provided, and a positioning plate is provided on the top of the rotating seat, the positioning plate having a plurality of locking holes; a support arm, rotating on the rotating seat, to which a cutting head is connected, and a guide structure is formed on the top of the support arm; an angle adjustment mechanism, disposed on the support arm, comprising an adjustment knob, a connecting rod, a connecting plate, and a locking pin, wherein the adjustment knob is rotatably connected to the first end of the connecting rod, the guide structure is formed on the edge of the connecting rod, the middle part of the connecting plate rotates on the support arm, one end of the connecting plate slides on the second end of the connecting rod, and the other end is hinged to the locking pin, the support arm is locked by the locking pin being inserted into the locking holes, and a spring is sleeved on the locking pin for resetting the locking pin; rotating the adjustment knob disengages the locking pin from the locking holes, the angle of the support arm can be freely adjusted, and after adjustment, the locking pin automatically resets under the action of the spring and inserts into the locking holes to achieve relocking.

[0007] In some embodiments, the adjustment knob is located at the top of the support arm, and a plurality of protruding guide ribs are formed on its outer wall.

[0008] In some embodiments, there are multiple guide structures arranged around the connecting rod, including inclined guide plates and limiting posts. The inclined guide plates are formed on both sides of the limiting posts. When the adjustment knob is rotated, the guide ribs lift the adjustment knob and the connecting rod under the guidance of the inclined guide plates.

[0009] In some embodiments, a limiting block is formed on the first end of the connecting rod, and a baffle for limiting the connecting plate is fixed on the second end. The adjusting knob rotates on the limiting block and will not disengage from the limiting block.

[0010] In some embodiments, the connecting plate is a bent sheet material, with the bent portion being a rotating shaft that rotates on the support arm.

[0011] In some embodiments, the locking pin includes a plug portion for engaging the locking hole and a functional portion for connecting and mounting, wherein the diameter of the functional portion is smaller than that of the plug portion, the end of the plug portion is frustoconical, and the connecting plate is hinged to the end of the functional portion.

[0012] In some embodiments, the plug portion, most of the functional portion, and the spring are located inside the support arm, and the spring is sleeved on the functional portion.

[0013] In some embodiments, a limiting rod perpendicular to the rotating seat is provided on the rotating seat, and a limiting groove is provided on the support arm, with the limiting rod placed in the limiting groove.

[0014] The beneficial effects of this application are as follows: compared with the traditional angle adjustment mechanism of the miter saw, the locking and unlocking operation is more convenient. Simply operate the adjustment knob located at the top of the support arm, and through the transmission of the connecting rod and the connecting plate, the locking pin can be pulled out from the locking hole, the adjustment knob is released, and under the action of the spring, the locking pin and the adjustment knob automatically reset and relock. The operation is simple and convenient. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional schematic diagram of the oblique fracture of this application.

[0017] Figure 2 This is a schematic diagram of the rotating seat of this application.

[0018] Figure 3 This is a schematic diagram of the internal structure of the support arm in this application.

[0019] Figure 4 This is another perspective view of the internal structure of the support arm in this application.

[0020] Figure 5 This application is Figure 4 Enlarged diagram of point A in the middle.

[0021] Figure 6 This is a schematic diagram of the angle adjustment mechanism of this application.

[0022] Figure 7 This is a schematic diagram of the linkage in this application.

[0023] Reference numerals: 1. Base, 2. Rotating seat, 3. Positioning plate, 4. Locking hole, 5. Support arm, 6. Cutting head, 7. Guide structure, 701. Inclined guide plate, 702. Limiting post, 8. Adjusting knob, 801. Guide rib, 802. Notch, 9. Connecting rod, 901. First end, 902. Second end, 903. Limiting block, 10. Connecting plate, 11. Locking pin, 1101. Insertion part, 1102. Functional part, 12. Spring, 13. Limiting rod, 14. Limiting groove, 15. Baffle. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In addition, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those of ordinary skill in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection of this application.

[0025] In the embodiments of this application, please refer to Figures 1-7As shown, the angle adjustment mechanism of the oblique cutting saw mainly includes: a base 1, on which a rotating seat 2 is provided, and a positioning plate 3 is provided on the top of the rotating seat 2, and the positioning plate 3 has several locking holes 4; a support arm 5, which rotates on the rotating seat 2 and is connected to a cutting head 6, and a guide structure 7 is formed on the top of the support arm 5; and an angle adjustment mechanism, which is provided on the support arm 5, including an adjustment knob 8, a connecting rod 9, a connecting plate 10, and a locking pin 11. The adjustment knob 8 is rotatably connected to the first end 901 of the connecting rod 9, the guide structure 7 is formed on the edge of the connecting rod 9, the middle part of the connecting plate 10 rotates on the support arm 5, and one end of the connecting plate 10 slides. The second end 902 of the connecting rod 9 is movable, and the other end is hinged to the locking pin 11. The support arm 5 is locked by inserting the locking pin 11 into the locking hole 4. A spring 12 is sleeved on the locking pin 11 to allow the locking pin 11 to reset. When the adjustment knob 8 is rotated, the locking pin 11 disengages from the locking hole 4, and the support arm 5 can be freely adjusted in angle. After adjustment, the locking pin 11 automatically resets under the action of the spring 12 and inserts into the locking hole 4 to achieve relocking. Since the cutting head 6 is not closely related to the angle adjustment mechanism of this application, the labeling of the cutting head 6 is only to make the scheme more complete and to better understand the effect of this application. The labeling of the cutting table in the attached figure is a labeling of its position.

[0026] The following will continue to describe some preferred / improved embodiments based on the above embodiments. Any one of the following embodiments can be selected, or multiple embodiments can be combined.

[0027] like Figures 4-5 As shown, the adjustment knob 8 is located at the top of the support arm 5, and a number of protruding guide ribs 801 are formed on its outer wall. The guide ribs 801 are evenly distributed around the side of the adjustment knob 8, and their number is the same as the number of guide structures 7, with two or more, preferably four.

[0028] Furthermore, combined with Figure 6As shown, there are multiple guide structures 7 arranged around the connecting rod 9, including inclined guide plates 701 and limiting posts 702. The inclined guide plates 701 are formed on both sides of the limiting posts 702. When the adjusting knob 8 is rotated, the guide ribs 801, guided by the inclined guide plates 701, lift the adjusting knob 8 and the connecting rod 9. The adjusting knob 8 has several notches 802 that match the size of the guide structures 7. When the adjusting knob 8 is not rotated, the guide structures 7 are embedded in the notches 802, while the limiting posts 702 on the guide structures 7 protrude outward relative to the inclined guide plates 701. 702 will not interfere with the initial rotation of the adjustment knob 8. It will only limit the further rotation of the guide rib 801 and the adjustment knob 8 when the adjustment knob 8 rotates to the point where the guide rib 801 contacts the limiting post 702. When the adjustment knob 8 rotates, the inner wall of the notch 802 and the guide rib 801 are pressed together with the inclined plane, and the adjustment knob 8 is gradually raised under the guidance of the inclined plane guide plate 701 until the guide rib 801 is interfered with by the limiting post 702, and the adjustment knob 8 reaches the maximum rotation amount. The adjustment knob 8 can rotate clockwise or counterclockwise at will, and multiple guide ribs 801 and the guide structure 7 can play a guiding role at the same time.

[0029] like Figures 6-7 As shown, a limiting block 903 is formed on the first end 901 of the connecting rod 9, and a baffle 15 for limiting the connecting plate 10 is fixed on the second end 902. The adjusting knob 8 rotates on the limiting block 903 and will not detach from the limiting block 903. The limiting block 903 serves as the rotation axis of the adjusting knob 8 and is used to limit the adjusting knob 8 to prevent it from detaching from the connecting rod 9. The baffle 15 supports the connecting plate 10 and prevents it from detaching from the connecting rod 9. Fasteners are provided below the baffle 15 to fix and support the baffle 15 so that the baffle 15 does not detach from the connecting rod 9. In this application, the baffle 15 is a metal sheet that is sleeved on the connecting rod 9 and can move freely within a certain range. In another embodiment, the baffle 15 can also be a metal block integrally formed on the second end 902 of the connecting rod 9, or other parts of other shapes and materials, which can prevent the connecting parts from falling off. When the adjusting knob 8 is rotated, the connecting rod 9 and the adjusting knob 8 are raised together.

[0030] like Figure 3 As shown, most of the angle adjustment structure is located inside the support arm 5, and the connecting rod 9 passes through the support arm 5 and can slide up and down on the support arm 5.

[0031] Furthermore, the connecting plate 10 is a bent plate, and its bend is a rotating shaft that rotates on the support arm 5. When the connecting rod 9 is lifted, one end of the connecting plate 10 is lifted upward. With the pivot of the connecting plate 10 as the fulcrum, the other end of the connecting plate 10 connected to the locking pin 11 is pried under the action of the lever, causing the locking pin 11 to be pulled out of the locking hole 4.

[0032] likeFigure 6 As shown, the locking pin 11 includes a plug portion 1101 for engaging with the locking hole 4 and a functional portion 1102 for connection and installation. The diameter of the functional portion 1102 is smaller than that of the plug portion 1101. The end of the plug portion 1101 is frustoconical. The connecting plate 10 is hinged to the end of the functional portion 1102. The frustoconical end provides more redundancy and adjustment space when blindly inserted into the locking pin, making it easier for the locking pin 11 to be inserted into the locking hole 4.

[0033] Furthermore, the insertion part 1101, most of the functional parts 1102, and the spring 12 are placed inside the support arm 5. The spring 12 is sleeved on the functional part 1102 and placed on the inner wall of the support arm 5. When the locking pin 11 is pulled out of the locking hole 4, one end of the spring 12 is supported and squeezed by the insertion part, and the other end is squeezed and supported by the inner wall of the support arm 5. The spring 12 is compressed. When the adjustment knob 8 is released, the spring 12 relaxes and returns to its original position, driving the locking pin 11 to reset. The locking pin 11 is then reinserted into the appropriate locking hole 4 to achieve locking.

[0034] like Figures 1-2 As shown, a limiting rod 13 perpendicular to the rotating seat 2 is provided on the rotating seat 2, and a limiting groove 14 is provided on the support arm 5. The limiting rod 13 is placed in the limiting groove 14. The cooperation between the limiting groove 14 and the limiting rod 13 is used to limit the adjustment range of the angle adjustment mechanism. The limiting groove 14 is arc-shaped.

[0035] Usage and Principle: When it is necessary to adjust the support arm 5 and the cutting head 6, rotate the adjustment knob 8 in any direction. The inner wall of the notch 802 on the adjustment knob 8 (i.e., the contact surface between the notch 802 and the inclined guide plate 701), the guide rib 801 and the inclined guide plate 701 on the guide structure 7 are pressed together and guided by the inclined guide plate 701 until the guide rib 801 is limited by the limiting post 702. At this time, the adjustment knob 8 and the connecting rod 9 are raised. The raising of the connecting rod 9 pryes the connecting plate 10 and finally transmits to the locking pin 11, pulling the locking pin 11 out of the locking hole 4. The support arm 5 is unlocked and the angle can be freely adjusted. When the appropriate angle is reached, release the adjustment knob 8. The spring 12 will return to its original position, giving the locking pin 11 a return force. Continue to rotate to fine-tune the angle of the support arm 5 until the locking pin 11 is inserted into the nearest locking hole 4. At this time, the locking pin 11, the spring 12, and the adjustment knob 8 are reset, and the support arm 5 is locked. This realizes the functions of unlocking, adjusting and relocking, which is convenient to operate.

[0036] The various embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of this application. The foregoing embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An angle adjustment mechanism for a bevel saw, characterized in that, include: A base, on which a rotating seat is provided, and a positioning plate is provided on the top of the rotating seat, and the positioning plate is provided with several locking holes; A support arm rotates on the rotating seat and a cutting head is connected thereto. A guide structure is formed on the top of the support arm. An angle adjustment mechanism is provided on the support arm and includes an adjustment knob, a connecting rod, a connecting plate, and a locking pin. The adjustment knob is rotatably connected to the first end of the connecting rod. The guide structure is formed on the edge of the connecting rod. The middle part of the connecting plate rotates on the support arm. One end of the connecting plate slides on the second end of the connecting rod, and the other end is hinged to the locking pin. The support arm is locked by inserting the locking pin into the locking hole. A spring is sleeved on the locking pin for the locking pin to return to its original position. Rotating the adjustment knob disengages the locking pin from the locking hole, allowing the support arm to adjust its angle freely. After adjustment, the locking pin automatically resets under the action of the spring and inserts into the locking hole, thus re-locking.

2. The angle adjustment mechanism for a bevel saw according to claim 1, characterized in that, The adjustment knob is located at the top of the support arm, and several protruding guide ribs are formed on its outer wall.

3. The angle adjustment mechanism for a bevel saw according to claim 2, characterized in that, The guide structure comprises multiple components arranged around the connecting rod, including inclined guide plates and limiting posts. The inclined guide plates are formed on both sides of the limiting posts. When the adjustment knob is rotated, the guide ribs lift the adjustment knob and the connecting rod under the guidance of the inclined guide plates.

4. The angle adjustment mechanism for a bevel saw according to claim 1, characterized in that, A limiting block is formed on the first end of the connecting rod, and a baffle for limiting the connecting plate is fixed on the second end. The adjusting knob rotates on the limiting block and will not disengage from the limiting block.

5. The angle adjustment mechanism for a bevel saw according to claim 1, characterized in that, The connecting plate is a bent sheet material, and the bent part is a rotating shaft that rotates on the support arm.

6. The angle adjustment mechanism for a bevel saw according to claim 1, characterized in that, The locking pin includes a plug portion for engaging the locking hole and a functional portion for connecting and installing. The diameter of the functional portion is smaller than that of the plug portion, and the end of the plug portion is frustoconical. The connecting plate is hinged to the end of the functional portion.

7. The angle adjustment mechanism for a bevel saw according to claim 6, characterized in that, The plug-in part, most of the functional parts and the spring are located inside the support arm, and the spring is sleeved on the functional parts.

8. The angle adjustment mechanism for a bevel saw according to claim 1, characterized in that, A limiting rod perpendicular to the rotating seat is provided on the rotating seat, and a limiting groove is provided on the support arm, with the limiting rod placed in the limiting groove.

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