Saw blade replacing mechanism for sliding table saw

Abstract

The utility model belongs to the technical field of sliding table saws, and particularly relates to a saw blade replacing mechanism for a sliding table saw, which comprises a pre-inserting seat, a saw blade body, a pushing cover and an eccentric lock handle piece, the eccentric lock handle piece is provided with a tensioning assembly attached to the pre-inserting seat, the pushing cover is arranged on the tensioning assembly, and the saw blade body is arranged on the pushing cover. The saw blade is tightly pressed on the pre-insertion seat through the eccentric lock handle piece, and the pre-insertion seat is provided with a limiting assembly used for restraining springback of the eccentric lock handle piece. According to the utility model, the pre-insertion seat is matched with the tensioning assembly and the eccentric lock handle piece, so that the mechanism can improve and optimize the replacement operation of the saw blade, and the saw blade can be assembled and fixed in advance. And during replacement, the eccentric lock handle piece can be clamped or released only by operating the eccentric lock handle piece, so that the mounting efficiency and convenience are improved, and the mounting risk is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of sliding table saw technology, specifically relating to a saw blade replacement mechanism for a sliding table saw. Background Technology

[0002] In the replacement of saw blades on a sliding table saw, the traditional method of using a locking nut for fixing has significant operational defects and safety hazards: First, to ensure the stability of the saw blade, a very high torque must be applied to the locking nut. The operator must expend considerable physical strength to overcome the preload during disassembly, and long-term use can further increase the difficulty of disassembly due to thread corrosion or impurities. Second, when using a wrench to forcefully rotate the nut for disassembly, the inertia generated by the sudden loosening of the nut can easily cause the operator's limbs or tools to come into accidental contact with the sharp saw blade, resulting in serious injury. Third, installing a new saw blade also requires sufficient tightening torque, which not only increases labor intensity but also significantly extends the replacement time due to the need for repeated tool adjustments. Most notably, the entire replacement process involves multiple steps, including removing the nut, taking off the old saw blade, installing the new saw blade, and tightening the nut. The operator must simultaneously manage saw blade positioning and tool operation. This complex multi-tasking operation mode easily leads to improper installation and significantly reduces work efficiency. Therefore, this utility model proposes a saw blade replacement mechanism for a sliding table saw to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to provide a saw blade replacement mechanism for a sliding table saw, which can solve the above-mentioned technical problems.

[0004] The specific technical solution adopted by this utility model is as follows:

[0005] This utility model provides a saw blade replacement mechanism for a sliding table saw, including a pre-socket, a saw blade body, a push cover, and an eccentric lock handle. The eccentric lock handle is provided with a tensioning component that fits into the pre-socket. The push cover is provided on the tensioning component and presses the saw blade onto the pre-socket through the eccentric lock handle. The pre-socket is provided with a limiting component for restraining the rebound of the eccentric lock handle.

[0006] The tensioning assembly includes a insert frame and a saw shaft. The saw shaft is sleeved on the saw blade body, which is positioned on the side of the pre-socket. The insert frame is positioned in an opening slot on the pre-socket, and the side of the insert frame is fixedly connected to one side of the saw shaft. An inner sleeve block is fixedly installed in the opening slot. The insert frame is sleeved in the opening slot and engages with the inner sleeve block. After the insert frame, inner sleeve block, and opening slot are engaged, they are in a clearance fit state. The other side of the pre-socket is interference-fitted with a drive shaft, which is the motor output shaft of a table saw.

[0007] The eccentric lock handle is rotatably mounted on one side of the pull rod, and the other side of the pull rod is threadedly connected to the other side of the saw shaft. The push cover is fitted onto the saw shaft and abuts against the side of the saw blade body.

[0008] Preferably, the pull rod slides into the circular hole on the push cover, the eccentric lock handle abuts against the push ring, and the push ring is slidably sleeved on the pull rod and abuts against the side of the push cover. The radius of the push ring is set to be larger than the radius of the circular hole on the push cover.

[0009] Preferably, the limiting component includes a spring-loaded constraint cover and a push-back spring. The spring-loaded constraint cover is fitted onto the push-pressure cover, and the push-back spring is fitted onto the push-pressure cover and located between the fixed ring and the push-back ring. The fixed ring is fixed to the side of the push-pressure ring near the saw blade body, and the push-back ring is fixed to the opening side of the spring-loaded constraint cover. The spring-loaded constraint cover has a return hole that fits onto the eccentric lock handle. The radius of the return hole is larger than the radius of the push-pressure ring and smaller than the radius of the saw shaft.

[0010] Preferably, the limiting component also includes a guide screw, which passes through the springback constraint cover and the push cover and is threaded into a screw hole. The screw hole is located on the other side of the saw shaft, and the guide screw is offset from the push ring.

[0011] Preferably, the inner sleeve block has a recessed notch corresponding to the inner side of the opening groove, and the notch is fitted into the insert frame. The inner length of the insert frame is set to 1.2 times the length of the inner sleeve block.

[0012] Preferably, the width of the notch is set to half the displacement distance of the insert frame driven by the eccentric lock handle, and the thickness of the insert frame is set to be consistent with the width of the notch.

[0013] Preferably, when the insert frame is attached to the inside of the notch, the side connected to the saw shaft is located in the opening groove and is offset from the side of the pre-socket.

[0014] Preferably, when the eccentric lock handle rotates and adjusts to drive the push cover to press the saw blade body against the side of the pre-socket, its clamping force is set to be no less than 250N.

[0015] The beneficial effects are:

[0016] This invention, through the cooperation of a pre-socket, a tensioning assembly, and an eccentric lock handle, allows the saw blade body to be pre-installed on the tensioning assembly and the limiting assembly to be installed. The insert frame on the tensioning assembly is then inserted into the corresponding slot on the pre-socket, simultaneously engaging with the inner sleeve block. Rotating the handle on the eccentric lock handle drives its eccentric wheel to move the push ring and the saw blade body, causing the push cover to engage with the pre-socket to clamp and fix the saw blade body. Simultaneously, the rotating handle on the eccentric lock handle releases its obstruction of the spring-loaded constraint cover, allowing the return sleeve hole on the spring-loaded constraint cover to move and engage with the handle on the eccentric lock handle, thus restricting the reverse rotation of the handle.

[0017] This design allows for improved and optimized saw blade replacement operations, enabling the saw blade to be pre-assembled and secured. During replacement, the clamping or releasing of the blade can be adjusted simply by operating the eccentric lock handle, thereby improving installation efficiency and convenience while reducing installation risks. Attached Figure Description

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

[0019] Figure 2 This is a schematic diagram of the explosion distribution structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the pre-socket structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the tensioning component structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the limiting component structure of this utility model.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Pre-socket; 1a. Opening slot; 1b. Inner sleeve block; 1c. Recess; 1d. Drive shaft; 2. Insert plate frame; 3. Saw blade body; 4. Springback constraint cover; 41. Back thrust ring; 42. Return sleeve hole; 5. Push cover; 51. Fixing ring; 6. Back thrust spring; 7. Guide rail screw; 8. Saw shaft; 81. Screw hole; 9. Pull rod; 10. Push ring; 11. Eccentric lock handle. Detailed Implementation

[0025] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0026] like Figure 1-5 As shown, a saw blade replacement mechanism for a sliding table saw includes a pre-socket 1, a saw blade body 3, a push cover 5, and an eccentric lock handle 11. The eccentric lock handle 11 is provided with a tensioning component that fits into the pre-socket 1. The push cover 5 is provided on the tensioning component and presses the saw blade onto the pre-socket 1 through the eccentric lock handle 11. The pre-socket 1 is provided with a limiting component for restraining the rebound of the eccentric lock handle 11. Both the push cover 5 and the rebound restraint cover 4 are set as concave cylindrical shapes.

[0027] The tensioning assembly includes a insert frame 2 and a saw shaft 8. The saw shaft 8 is sleeved on the saw blade body 3. The saw blade body 3 is positioned on the side of the pre-socket 1. The insert frame 2 is positioned in the opening slot 1a on the pre-socket 1, and the side of the insert frame 2 is fixedly connected to one side of the saw shaft 8. An inner sleeve block 1b is fixedly installed in the opening slot 1a. The insert frame 2 is sleeved in the opening slot 1a and engages with the inner sleeve block 1b. After the insert frame 2 engages with the inner sleeve block 1b and the opening slot 1a, they are in a clearance fit state. The other side of the pre-socket 1 is interference-fitted with the drive shaft 1d, which is the motor output shaft of the table saw.

[0028] The eccentric lock handle 11 is rotatably mounted on one side of the pull rod 9, and the other side of the pull rod 9 is threadedly connected to the other side of the sleeve saw shaft 8. The push cover 5 is fitted onto the sleeve saw shaft 8 and abuts against the side of the saw blade body 3.

[0029] As an optional implementation, the pull rod 9 slides into the circular hole on the push cover 5, the eccentric lock handle 11 abuts against the push ring 10, and the push ring 10 is slidably sleeved on the pull rod 9 and abuts against the side of the push cover 5. The radius of the push ring 10 is set to be larger than the radius of the circular hole on the push cover 5. This allows the push ring 10 to squeeze the push cover 5 when the eccentric lock handle 11 is adjusted, thereby pushing the saw blade body 3 against the side of the pre-socket 1 to form a clamping and fixing effect.

[0030] See attached document Figure 5 The limiting components include a spring-loaded constraint cover 4 and a push-back spring 6. The spring-loaded constraint cover 4 is fitted onto the push-pressure cover 5, and the push-back spring 6 is fitted onto the push-pressure cover 5 and located between the fixed ring 51 and the push-back ring 41. The fixed ring 51 is fixed on the side of the push-pressure ring 10 near the saw blade body 3, and the push-back ring 41 is fixed on the opening side of the spring-loaded constraint cover 4. The spring-loaded constraint cover 4 has a return hole 42 that fits onto the eccentric lock handle 11. The radius of the return hole 42 is set to be larger than the radius of the push-pressure ring 10 and smaller than the radius of the saw shaft 8, so that the return hole 42 can slide through the push-pressure ring 10 to restrict the rotation of the handle on the eccentric lock handle 11.

[0031] Furthermore, the limiting components also include a guide screw 7, which passes through the spring-loaded constraint cover 4 and the push cover 5 and is threaded into the screw hole 81. The screw hole 81 is located on the other side of the saw shaft 8. The guide screw 7 and the push ring 10 are misaligned. This allows the guide screw 7 to pass through the spring-loaded constraint cover 4 and the push cover 5 and be threaded into the screw hole 81, thereby limiting the displacement of the elastically pushed spring-loaded constraint cover 4. This ensures that the return hole 42 on the spring-loaded constraint cover 4 restrains the handle on the adjusted eccentric lock handle 11, thus providing an anti-dislodgement effect when the saw blade body 3 rotates and cuts.

[0032] See attached document Figure 3 and attached Figure 4 The inner sleeve block 1b and the inner side of the opening groove 1a are respectively provided with a recessed notch 1c, and the notch 1c is fitted with the insert frame 2. The inner length of the insert frame 2 is set to 1.2 times the length of the inner sleeve block 1b, so that the insert frame 2 can be adjusted to move away from the inner sleeve block 1b.

[0033] Furthermore, the width of the notch 1c is set to half the displacement distance of the insert frame 2 driven by the eccentric lock handle 11, and the thickness of the insert frame 2 is set to be consistent with the width of the notch 1c. In this way, after the insert frame 2 is embedded in the notch 1c on the inner sleeve block 1b, the insert frame 2 is pulled by the eccentric lock handle 11, which drives the saw blade body 3 to abut against the side of the pre-socket 1 for clamping.

[0034] Furthermore, when the insert frame 2 is attached to the inside of the notch 1c, the side of it that connects to the saw shaft 8 is located in the opening groove 1a and is offset from the side of the pre-socket 1. This allows the side of the pre-socket 1 to form a contact support against the saw blade body 3, thereby cooperating with the push cover 5 to clamp and fix the saw blade body 3.

[0035] Furthermore, when the eccentric lock handle rotates and adjusts to drive the push cover 5 to press the saw blade body 3 against the side of the pre-socket 1, its clamping force is set to be no less than 250N, thus maintaining the clamping effect on the saw blade body 3 and maintaining the rotational cutting effect.

[0036] Using the above structure, the following steps are included:

[0037] 1. Installation steps:

[0038] The saw blade body 3 is pre-installed on the saw shaft 8. Then, the insert plate frame 2 is aligned with the opening slot 1a on the pre-socket 1 and inserted so that the insert plate frame 2 fits into the recess 1c of the inner sleeve block 1b. Then, the eccentric lock handle 11 is rotated to push the push ring 10 to move through the eccentric action, so that the push ring 10 squeezes the push cover 5 and presses the saw blade body 3 tightly against the side of the pre-socket 1.

[0039] Continue rotating the eccentric lock handle 11 to the locked position. At this time, the spring-loaded constraint cover 4 moves forward automatically under the action of the push spring 6. The return hole 42 of the spring-loaded constraint cover 4 covers the handle of the eccentric lock handle 11 to prevent it from rotating in the opposite direction. Finally, the guide screw 7 fixes the position of the spring-loaded constraint cover 4.

[0040] 2. Disassembly procedure:

[0041] Pull the spring-loaded constraint cover 4 backward to disengage the return hole 42 from the handle of the eccentric lock handle 11. Rotate the eccentric lock handle 11 in the opposite direction to release the pressure on the push cover 5. Pull the insert frame 2 out of the opening slot 1a of the pre-socket 1, and the entire saw blade assembly can be removed.

[0042] This invention, through the aforementioned structural design, enables rapid saw blade replacement, offering simple, safe, and reliable operation. The pre-assembled design reduces on-site operational steps, the eccentric locking mechanism ensures stable clamping force, and the limiting components effectively prevent accidental loosening during operation.

[0043] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part all adopt conventional methods such as bolts, rivets, and welding, which are mature technologies in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art. This application is mainly used to protect mechanical devices. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, are implemented according to conventional methods in the field.

Claims

1. A saw blade changing mechanism for a sliding table saw, characterized in that: The device includes a pre-socket (1), a saw blade body (3), a push cover (5), and an eccentric lock handle (11). The eccentric lock handle (11) is provided with a tensioning component that fits against the pre-socket (1). The push cover (5) is provided on the tensioning component and presses the saw blade against the pre-socket (1) through the eccentric lock handle (11). The pre-socket (1) is provided with a limiting component for restraining the rebound of the eccentric lock handle (11). The tensioning assembly includes a insert frame (2) and a saw shaft (8). The saw shaft (8) is sleeved on the saw blade body (3). The saw blade body (3) is positioned on the side of the pre-socket (1). The insert frame (2) is positioned in the opening slot (1a) on the pre-socket (1). The side of the insert frame (2) is fixedly connected to one side of the saw shaft (8). An inner sleeve block (1b) is fixedly provided in the opening slot (1a). The insert frame (2) is sleeved in the opening slot (1a) and sleeved with the inner sleeve block (1b). After the insert frame (2) is sleeved with the inner sleeve block (1b) and the opening slot (1a), they are in a clearance fit state. The other side of the pre-socket (1) is interference-fitted with the drive shaft (1d). The drive shaft (1d) is the motor output shaft of the table saw. The eccentric lock handle (11) is rotatably mounted on one side of the pull rod (9), and the other side of the pull rod (9) is threadedly connected to the other side of the saw shaft (8). The push cover (5) is fitted on the saw shaft (8) and abuts against the side of the saw blade body (3).

2. The saw blade replacement mechanism for a sliding table saw according to claim 1, characterized in that: The pull rod (9) slides into the circular hole on the push cover (5), the eccentric lock handle (11) abuts against the push ring (10), and the push ring (10) slides on the pull rod (9) and abuts against the side of the push cover (5). The radius of the push ring (10) is set to be larger than the radius of the circular hole on the push cover (5).

3. The saw blade replacement mechanism for a sliding table saw according to claim 2, characterized in that: The limiting components include a spring-loaded constraint cover (4) and a push spring (6). The spring-loaded constraint cover (4) is fitted onto the push cover (5). The push spring (6) is fitted onto the push cover (5) and located between the fixed ring (51) and the push ring (41). The fixed ring (51) is fixed on the side of the push ring (10) near the saw blade body (3). The push ring (41) is fixed on the opening side of the spring-loaded constraint cover (4). The spring-loaded constraint cover (4) has a return hole (42) fitted onto the eccentric lock handle (11). The radius of the return hole (42) is set to be larger than the radius of the push ring (10) and smaller than the radius of the saw shaft (8).

4. The saw blade replacement mechanism for a sliding table saw according to claim 3, characterized in that: The limiting component also includes a guide screw (7), which passes through the springback constraint cover (4) and the push cover (5) and is threaded into a screw hole (81). The screw hole (81) is located on the other side of the saw shaft (8). The guide screw (7) is offset from the push ring (10).

5. The saw blade replacement mechanism for a sliding table saw according to claim 4, characterized in that: The inner sleeve block (1b) and the inner side of the opening groove (1a) are respectively provided with a recessed notch (1c), and the notch (1c) is fitted into the insert frame (2). The inner length of the insert frame (2) is set to 1.2 times the length of the inner sleeve block (1b).

6. The saw blade replacement mechanism for a sliding table saw according to claim 5, characterized in that: The width of the notch (1c) is set to half the displacement distance of the insert frame (2) driven by the eccentric lock handle (11), and the thickness of the insert frame (2) is set to be consistent with the width of the notch (1c).

7. A saw blade replacement mechanism for a sliding table saw according to claim 6, characterized in that: When the insert frame (2) is attached to the inside of the notch (1c), the side of it that is connected to the saw shaft (8) is located in the opening groove (1a) and is offset from the side of the pre-socket (1).

8. A saw blade replacement mechanism for a sliding table saw according to claim 7, characterized in that: When the eccentric lock handle is rotated and adjusted to drive the push cover (5) to press the saw blade body (3) against the side of the pre-socket (1), its clamping force is set to be no less than 250N.

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