Locking mechanism of miter saw

Abstract

A scale plate is installed on a base, clamping grooves are formed in the base and the scale plate, a rotary disc is installed above the base, a tension spring is connected to the end, close to the base, of the rotary disc, a locking rod is connected to the end, away from the rotary disc, of the tension spring, and the tension spring is hinged to the locking rod. One end, far away from the tension spring, of the locking rod can be clamped in the clamping groove of the turntable; a connecting piece is further installed on the rotary disc and fixedly connected with the rotary disc, a screw rod is installed on the connecting piece and penetrates through the connecting piece, the penetrating end of the screw rod points to the center of the base, a locking claw is fixedly connected to the end, close to the center of the base, of the screw rod, the screw rod is in threaded connection with the connecting piece, and the screw rod is further sleeved with an adjusting base fixedly connected with the screw rod. The locking function of the locking claw is achieved through threaded connection of the screw rod, the locking requirement of the locking rod on the scale plate is met through cooperation of the tension spring, the adjusting base and the locking rod, and the risk that the locking function is reduced due to long-term use is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of cutting equipment, specifically to a locking mechanism for a bevel saw. Background Technology

[0002] Traditional miter saws, as cutting tools, have a wide range of applications and can be used to cut various metals and non-metals. A miter saw generally includes a base, a worktable mounted on the base, and a guard mounted on the base. The worktable supports the workpiece horizontally, while the guard abuts the workpiece vertically. The worktable can rotate relative to the base, allowing the saw blade to move at an angle relative to the vertical guard while maintaining the saw blade's perpendicularity to the worktable surface, achieving the mitering effect.

[0003] The miter saw's worktable is positioned on a base and can rotate around the base's center. It has two states in application: a rotatable state and a locked position that restricts rotation. The locking device is mainly a push rod mounted on the worktable that can move back and forth, or a slider is added to the front end of the push rod. The push rod presses against the base to achieve the locking purpose.

[0004] However, all of the above solutions involve applying external force to the push rod to press it tightly against the arc surface of the base, thereby limiting the rotation of the worktable relative to the base. But as the machine continues to run, the force applied to the push rod will gradually decrease, causing the locking effect to become inconsistent and making it difficult to maintain the initial locking state. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a locking mechanism for a miter saw. By using a screw, tension spring, adjusting seat, and locking rod, a locking structure can be formed. This structure is simple in design, easy to operate, and its locking effect will not decrease due to repeated use.

[0006] The above-mentioned objective of this utility model is achieved through the following technical solution:

[0007] A locking mechanism for a miter saw includes a base, a scale plate mounted on the base, and slots formed on both the base and the scale plate. A turntable is mounted above the base, a tension spring is connected to one end of the turntable near the base, and a locking rod is connected to the other end of the tension spring away from the turntable. The tension spring and the locking rod are hinged together, and the other end of the locking rod away from the tension spring can be engaged in the slot of the turntable.

[0008] The turntable is also equipped with a connector, which is fixedly connected to the turntable. A screw is installed on the connector, which passes through the connector and the end of the screw pointing towards the center of the base. A locking claw is fixedly connected to the end of the screw near the center of the base. The screw is threadedly connected to the connector. An adjusting seat is also fitted on the screw and is fixedly connected to the screw. When the adjusting seat rotates with the screw, it can lift the end of the locking rod away from the tension spring.

[0009] In a preferred embodiment, the present invention can be further configured such that: a groove is provided on the adjusting seat, and the locking rod can be engaged in the groove with a clearance fit between the locking rod and the groove.

[0010] In a preferred embodiment, the present invention can be further configured such that: a guide block is provided at one end of the turntable near the locking claw, and the guide block is fixedly connected to the turntable;

[0011] The screw is divided into a smooth section and a threaded section, with the smooth section being closer to the locking claw.

[0012] The smooth segment extends through the guide block.

[0013] In a preferred embodiment, the present invention can be further configured such that: a snap-fit ​​component is provided at one end of the screw near the locking claw, the snap-fit ​​component is fixedly connected to the turntable, and the snap-fit ​​component is a U-shaped component.

[0014] In a preferred embodiment, the present invention can be further configured such that: the base is also provided with an abutting arc plate, the abutting arc plate is fixedly connected to the base, and when the adjusting seat is engaged with the scale plate, the locking claw applies force to the abutting arc plate.

[0015] In a preferred embodiment, the present invention can be further configured such that a rotating handle is connected to the side of the threaded section away from the smooth section.

[0016] In summary, this utility model has at least one of the following beneficial technical effects:

[0017] This device innovatively combines the synergistic effects of a screw, tension spring, adjusting seat, and locking rod to construct an efficient reset mechanism. Specifically, the adjustment seat and screw work together to achieve precise spatial position control, while the elastic energy storage characteristics of the tension spring provide a continuous reset torque for the locking rod. This design optimizes the spatial arrangement of each component, enabling the motion mechanism to form a compact stacked structure in the vertical direction, ultimately reducing the system size while maintaining the stability of dynamic reset accuracy.

[0018] The locking pawl is self-locking via a screw thread connection structure. Combined with multiple mechanisms including elastic spring return, precise positioning of the locking rod, and linkage control of the adjustment seat, the locking rod and scale plate are securely locked through vertical return (cooperation of the spring and locking rod) and horizontal locking (cooperation of the screw and locking pawl). This composite locking mechanism effectively improves the system's fatigue resistance and eliminates the problem of locking force attenuation that may occur during long-term use. Its modular design allows for fine-tuning accuracy, meeting the long-term stable locking requirements of precision machinery. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this technical solution;

[0020] Figure 2 This is a partial structural schematic diagram of the technical solution;

[0021] Figure 3 This is a partial structural diagram of the technical solution.

[0022] Reference numerals: 1. Base; 2. Scale plate; 3. Slot; 4. Turntable; 5. Tension spring; 6. Locking rod; 7. Connector; 8. Screw; 81. Threaded section; 82. Smooth section; 9. Locking claw; 10. Adjusting seat; 11. Guide block; 12. Snap-fit ​​piece; 13. Abutting arc plate; 14. Rotating handle. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings.

[0024] like Figure 1-3 As shown, this is a locking mechanism for a miter saw disclosed in this technical solution, including a base 1, a scale plate 2 installed on the base 1, and slots 3 opened on both the base 1 and the scale plate 2. A turntable 4 is installed above the base 1. A tension spring 5 is connected to one end of the turntable 4 near the base 1, and a locking rod 6 is connected to the other end of the tension spring 5 away from the turntable 4. The tension spring 5 and the locking rod 6 are hinged together, and the other end of the locking rod 6 away from the tension spring 5 can be engaged in the slot 3 of the turntable 4.

[0025] A connector 7 is also installed on the turntable 4. The connector 7 is fixedly connected to the turntable 4. A screw 8 is installed on the connector 7. The screw 8 passes through the connector 7 and the end of the screw 8 that passes through points to the center of the base 1. A locking claw 9 is fixedly connected to the end of the screw 8 near the center of the base 1. The screw 8 is threadedly connected to the connector 7. An adjusting seat 10 is also fitted on the screw 8. The adjusting seat 10 is fixedly connected to the screw 8. When the adjusting seat 10 rotates with the screw 8, the adjusting seat 10 can lift the end of the locking rod 6 away from the tension spring 5.

[0026] The turntable 4 is rotatably connected to the base 1. This rotatable connection allows for the adjustment of the angle of the locking lever 6 on the scale plate 2. When the locking lever 6 is lifted at one end near the scale plate 2, the other end of the locking lever 6 will pull the tension spring 5. When the locking lever 6 is locked on the scale plate 2, the tension spring 5 returns to its normal state, i.e., its unstretched state when no force is applied.

[0027] The turntable 4 here is chosen to be circular, so the screw 8 is oriented towards the center of the turntable 4.

[0028] The adjusting seat 10 and locking lever 6 here are both functional components and are specially made parts. Therefore, as long as they meet the functional requirements, they will not be described in detail here.

[0029] In this technical solution, the existing beveling saw is improved. Therefore, apart from the modified technical features, the other technical features can still be adopted from the existing technology, and will not be elaborated here.

[0030] Furthermore, the adjusting seat 10 has a groove (not shown in the figure), and the locking rod 6 can be engaged in the groove with a clearance fit between the locking rod 6 and the groove.

[0031] A guide block 11 is provided at one end of the turntable 4 near the locking claw 9, and the guide block 11 is fixedly connected to the turntable 4;

[0032] The screw 8 is divided into a smooth section 82 and a threaded section 81, with the smooth section 82 being closer to the locking claw 9.

[0033] Smooth section 82 penetrates guide block 11.

[0034] In addition to fixing the screw 8, the connecting parts 7 and guide blocks 11 can also reduce the risk of deviation in the pointing angle of the screw 8 and improve the accuracy of the device.

[0035] Furthermore, the screw 8 is provided with a snap-fit ​​part 12 near the locking claw 9. The snap-fit ​​part 12 is fixedly connected to the turntable 4. The snap-fit ​​part 12 is a U-shaped part.

[0036] The snap-fit ​​connector 12 can further improve the accuracy of the screw 8's orientation.

[0037] Furthermore, the base 1 is also provided with an abutting arc plate 13, which is fixedly connected to the base 1. When the adjusting seat 10 is engaged with the scale plate 2, the locking claw 9 applies force to the abutting arc plate 13.

[0038] The abutting arc plate 13 is fitted with the locking claw 9. Since the locking claw 9 needs to apply a large force to the abutting arc plate 13, the hardness requirement of the abutting arc plate 13 is relatively high. If the locking claw 9 directly contacts the base 1, it may damage the base 1. If the base 1 is made of a high-strength material, it will increase the cost. In addition, even if the abutting arc plate 13 is damaged, it is easy to replace, which can reduce costs compared to replacing the base 1.

[0039] Furthermore, a rotating handle 14 is connected to the side of the threaded section 81 away from the smooth section 82, and the rotating handle 14 facilitates the rotation of the screw 8.

[0040] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A locking mechanism for a miter saw, comprising a base (1), a scale plate (2) mounted on the base (1), and slots (3) formed on both the base (1) and the scale plate (2), characterized in that, A turntable (4) is installed above the base (1). A tension spring (5) is connected to one end of the turntable (4) near the base (1). A locking rod (6) is connected to one end of the tension spring (5) away from the turntable (4). The tension spring (5) and the locking rod (6) are hinged together. The locking rod (6) can be engaged in the slot (3) of the turntable (4) at the end away from the tension spring (5). A connector (7) is also installed on the turntable (4). The connector (7) is fixedly connected to the turntable (4). A screw (8) is installed on the connector (7). The screw (8) passes through the connector (7) and the end of the screw (8) points to the center of the base (1). A locking claw (9) is fixedly connected to one end of the screw (8) near the center of the base (1). The screw (8) is threadedly connected to the connector (7). An adjusting seat (10) is also fitted on the screw (8). The adjusting seat (10) is fixedly connected to the screw (8). When the adjusting seat (10) rotates with the screw (8), the adjusting seat (10) can lift the end of the locking rod (6) away from the tension spring (5).

2. The locking mechanism of a miter saw according to claim 1, characterized in that, The adjusting seat (10) has a groove, and the locking rod (6) can be engaged in the groove with a clearance fit between the locking rod (6) and the groove.

3. The locking mechanism of a miter saw according to claim 1, characterized in that, The turntable (4) has a guide block (11) near the locking claw (9) and the guide block (11) is fixedly connected to the turntable (4); The screw (8) is divided into a smooth section (82) and a threaded section (81), and the smooth section (82) is located on the side closer to the locking claw (9). The smooth segment (82) penetrates the guide block (11).

4. The locking mechanism of a miter saw according to claim 3, characterized in that, The screw (8) is provided with a snap-fit ​​part (12) near the locking claw (9). The snap-fit ​​part (12) is fixedly connected to the turntable (4). The snap-fit ​​part (12) is a U-shaped part.

5. The locking mechanism of a miter saw according to claim 1, characterized in that, The base (1) is also provided with an abutting arc plate (13), which is fixedly connected to the base (1). When the adjusting seat (10) is engaged with the scale plate (2), the locking claw (9) applies force to the abutting arc plate (13).

6. The locking mechanism of a miter saw according to claim 3, characterized in that, A rotating handle (14) is connected to the side of the threaded section (81) away from the smooth section (82).

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