Depth adjustment mechanism for a track saw

Abstract

The utility model discloses a kind of depth adjusting mechanism of track saw, it is related to the technical field of track saw, it includes mounting bracket;The first end of electric saw support is vertically rotatablely connected in the mounting bracket;Arc-shaped guide rail is fixedly arranged in mounting bracket and is provided with arc-shaped guide slot, and arc-shaped guide rail is provided with arc-shaped rack parallel to arc-shaped guide slot;Baffle block component, baffle block component includes: limit stop, limit stop is arranged in arc-shaped guide rail, limit stop can be moved along arc-shaped guide slot, the second end of electric saw support is abutted on the upside of limit stop;Locking block, locking block is arranged in arc-shaped guide rail side away from limit stop, and locking block is provided with the locking tooth of meshing with arc-shaped rack;Unlock button, unlock button is arranged in arc-shaped guide rail side away from locking block and is connected locking block;Unlock button can be moved close to or away from arc-shaped guide rail.The utility model compact structure, layout is reasonable, it is convenient for user to adjust the cutting depth of track saw.

Description

Technical Field

[0001] This utility model relates to the technical field of track saws, and in particular to a depth adjustment mechanism for track saws. Background Technology

[0002] A rail saw is an electric circular saw used for cutting operations. The rail saw is placed on a rail, and the saw blade can travel along the rail to cut wood.

[0003] An existing rail saw includes a mounting frame and a saw body. The saw body includes a saw blade and a drive unit for rotating the saw blade. The first end of the saw body is hinged to the mounting frame, allowing the saw body to rotate vertically inward relative to the mounting frame. The mounting frame is connected to a graduated arc-shaped guide plate that extends upward. An arc-shaped guide groove is formed on the arc-shaped guide plate, and a limiting block that can slide and adjust along the arc-shaped guide groove is fitted to the arc-shaped guide groove. The second end of the saw body abuts against the upper part of the limiting block. The limiting block supports the saw body, and as the limiting block slides along the arc-shaped guide groove, the angle between the saw body and the mounting frame can be adjusted, thereby adjusting the cutting depth of the saw blade.

[0004] To ensure stable support for the limit block, both the limit block and the arc-shaped guide plate are equipped with a locking structure that locks the limit block within the arc-shaped guide groove. The limit block is connected to an unlocking button; pressing the unlocking button releases the locking structure, allowing the limit block to slide along the guide groove to adjust its position. In existing technology, the unlocking button is located on the upper side of the limit block. Pressing the unlocking button requires pinching the limit block and the unlocking button from both sides, which is inconvenient for adjusting the limit block. Furthermore, the limit block integrates a fine-tuning structure, which can easily interfere with the unlocking button when pressed, hindering user operation. Utility Model Content

[0005] The purpose of this invention is to provide a depth adjustment mechanism for a rail saw, which has a compact structure and reasonable layout, making it convenient for users to adjust the cutting depth of the rail saw.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: This utility model provides a depth adjustment mechanism for a rail saw, the depth adjustment mechanism comprising: Mounting rack; A chainsaw bracket, the first end of which is rotatably connected to the mounting frame; An arc-shaped guide rail is fixedly mounted on the mounting bracket. The arc-shaped guide rail has an arc-shaped guide groove extending along it, and an arc-shaped rack parallel to the arc-shaped guide groove. The stop assembly includes: A limiting block is provided on the arc-shaped guide rail and can move along the arc-shaped guide groove. The second end of the electric saw bracket abuts against the upper side of the limiting block. A locking block is disposed on the side of the arc-shaped guide rail opposite to the limiting block and is movably connected to the limiting block. The locking block is provided with locking teeth that mesh with the arc-shaped rack. An unlock button is provided on the side of the arc-shaped guide rail away from the locking block and connected to the locking block; the unlock button can move closer to or away from the arc-shaped guide rail to move the locking block away from or closer to the arc-shaped rack.

[0007] Furthermore, the stop assembly also includes a reset spring, which abuts against the side of the unlock button facing the arc-shaped guide rail.

[0008] Furthermore, the limiting block has a pressing part that extends between the arc-shaped guide rail and the unlock button and fits against the arc-shaped guide rail, and the end of the reset spring away from the unlock button abuts against the pressing part.

[0009] Furthermore, the limiting block has a limiting portion that blocks the movement path of the unlock button to limit the travel of the unlock button in a direction away from the arc-shaped guide rail.

[0010] Furthermore, the limiting block has an installation cavity, and the unlocking button is disposed in the installation cavity. One end of the unlocking button is rotatably connected to the limiting block in a vertical direction. The limiting block has a clearance opening that communicates with the installation cavity. The side of the unlocking button away from the arc-shaped guide rail is engaged with the clearance opening, and the sidewall of the clearance opening forms a limiting part.

[0011] Furthermore, a first guide post protrudes from the side of the clamping part away from the arc-shaped guide rail, and a second guide post protrudes from the side of the unlocking button facing the arc-shaped guide rail. The opposite ends of the reset spring are respectively sleeved on the first guide post and the second guide post.

[0012] Furthermore, the unlock button is connected to a connecting post on the side facing the arc-shaped guide rail. The connecting post passes through the arc-shaped guide groove and has a threaded hole. The locking block has a connecting hole that communicates with the threaded hole, and a connecting screw passes through the threaded hole and the connecting hole.

[0013] Furthermore, the arc-shaped rack includes a plurality of unidirectional teeth arranged parallel to the length direction of the arc-shaped guide groove. The upper side of the unidirectional teeth is a plane, and the lower side of the unidirectional teeth is an inclined plane. The upper side of the locking teeth is an inclined plane, and the lower side of the locking teeth is a plane.

[0014] Furthermore, the second end of the chainsaw bracket is connected to a fine-tuning component, which includes an adjusting screw and an abutment. The abutment abuts against the upper side of the limiting block, and the adjusting screw is connected to the side of the abutment away from the limiting block. The second end of the chainsaw bracket has a threaded adjusting hole that is threadedly engaged with the adjusting screw.

[0015] Furthermore, an adjusting spring is provided on the outer sleeve of the adjusting screw, one end of the adjusting spring abuts against the abutting part, and the other end of the adjusting spring away from the abutting part abuts against the second end of the chainsaw bracket.

[0016] In summary, this utility model has the following beneficial effects: 1. In the depth adjustment mechanism of the rail saw of this utility model, the limiting stop is set on the arc-shaped guide rail and locked on the arc-shaped guide rail by the locking teeth of the locking block engaging with the guide rack. Thus, the limiting stop can stably support the rail saw bracket below the second end of the rail saw bracket, so that the saw blade on the rail saw bracket maintains the current cutting depth. When it is necessary to adjust the cutting depth, the user presses the unlock button, which moves towards the arc-shaped guide rail, causing the locking teeth to move away from the arc-shaped rack to release the engagement between the locking teeth and the arc-shaped rack. At this time, the stop assembly can be moved along the arc-shaped guide groove and the rail saw bracket can be rotated around the first end of the rail saw bracket. The saw blade's cutting depth is adjusted. After the cutting depth is adjusted, the unlock button moves away from the arc-shaped guide rail, causing the locking teeth to move closer to the arc-shaped rack so that the locking teeth engage with the guide rack, locking the stop assembly onto the arc-shaped guide rail. In this design, the unlock button and the locking block are located on opposite sides of the arc-shaped guide rail. The stop assembly can be unlocked by pressing the unlock button perpendicular to the arc-shaped guide rail from one side. There is no need to pinch the unlock button and the locking block from both sides, making it convenient for users to keep the stop assembly unlocked and adjust its position along the arc-shaped guide groove. The stop assembly has a compact and reasonable structure and is easy to operate.

[0017] 2. The unlock button has a return spring abutting against the side facing the arc-shaped guide rail. When unlocking the stop assembly, the user presses the unlock button towards the arc-shaped guide rail. The unlock button compresses the return spring and causes the locking block to move away from the arc-shaped rack. After adjusting the position of the stop assembly, the user only needs to release the unlock button. The return spring will then drive the unlock button to move away from the arc-shaped guide rail and reset, causing the locking block to move towards the arc-shaped rack to engage with it, thus facilitating locking after the stop assembly is adjusted.

[0018] 3. The clamping part of the limit block is set between the arc-shaped guide rail and the unlocking button. The end of the reset spring away from the unlocking button abuts against the clamping part, thereby pressing the clamping part against the arc-shaped guide rail, making the overall structure of the block assembly more stable and compact.

[0019] 4. The limiting part of the limit block blocks the movement path of the unlock button, thereby limiting the travel of the unlock button away from the arc guide rail and preventing the unlock button from protruding excessively from the limit block; the contact between the limiting part and the unlock button also transfers the load borne by the limit block to the unlock button and the locking block, making the structure of the block assembly more reasonable and stable.

[0020] 5. The unlock button is located inside the mounting cavity of the limit block to reduce the volume of the block assembly and make it more compact. The side of the unlock button away from the arc-shaped guide rail is fitted with the clearance opening, allowing the user to operate the unlock button from the clearance opening. The unlock button is vertically rotatably connected to the limit block, and can rotate around this rotation connection point to move closer to or away from the arc-shaped guide rail. The vertical force of the limit block is transmitted to the unlock button through the rotation connection point of the limit block and the unlock button and the side wall (limiting part) of the clearance opening, so that the block assembly can better withstand the vertical force to support the second end of the chainsaw bracket.

[0021] 6. The two ends of the reset spring are respectively sleeved on the first guide post and the second guide post, so that the reset spring is stably positioned between the unlock button and the pressing part.

[0022] 7. The unlock button and the locking block are connected by connecting screws passing through the connecting hole and the threaded hole, which has good connection strength and is easy to install; the connecting post passes through the arc-shaped guide groove, which can guide the block assembly when it slides along the arc-shaped guide groove, making the block assembly move more stably and smoothly.

[0023] 8. The arc-shaped rack includes multiple one-way teeth. When the locking tooth engages with the one-way tooth, the upper side of the locking tooth is attached to the lower side of the upper one-way tooth, and the lower side of the locking tooth is attached to the upper side of the lower one-way tooth. The upper side of the one-way tooth is flat, and correspondingly, the lower side of the locking tooth is flat, which makes it difficult for the locking tooth to slide downwards and disengage from the one-way tooth, allowing the stop assembly to stabilize the second end of the chainsaw bracket. The lower side of the one-way tooth is inclined, and correspondingly, the upper side of the locking tooth is inclined, so that the stop assembly can be slid upwards to adjust the saw blade cutting depth even when the unlock button is not pressed to disengage the locking tooth and the one-way tooth.

[0024] 9. A fine-tuning component is provided at the second end of the electric saw bracket. Specifically, the fine-tuning component includes an adjusting screw and a stop part. The adjusting screw is threaded into the threaded adjusting hole at the second end of the electric saw bracket, and the stop part is connected to the adjusting screw and abuts against the upper side of the limit stop block. By rotating the adjusting screw, the distance from the stop part to the second end of the electric saw bracket can be finely adjusted, thereby realizing the fine adjustment of the saw blade cutting depth. This setting method makes the fine-tuning component and the stop block component independent of each other. Adjusting the position of the stop block component and adjusting the fine-tuning component do not interfere with each other, which is convenient for users to operate.

[0025] 10. The two ends of the adjusting spring abut against the second end and the abutment part of the electric saw bracket, respectively, to apply an axial force to the adjusting screw, so that the adjusting screw is stably engaged in the threaded adjusting hole, and the adjusting screw is not easily loosened by the vibration of the track saw during operation, so as to affect the accuracy of the track saw height adjustment. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural schematic diagram of a depth adjustment mechanism according to an embodiment of the present invention.

[0027] Figure 2 This is a three-dimensional structural diagram of the mounting bracket according to an embodiment of the present invention.

[0028] Figure 3 This is a vertical cross-sectional structural diagram of the degree adjustment mechanism according to an embodiment of the present invention.

[0029] Figure 4 This is an exploded structural diagram of an embodiment of the arc-shaped guide rail and stop block assembly of this utility model.

[0030] Figure 5 This is a three-dimensional structural diagram of an arc-shaped guide rail and a locking block according to an embodiment of the present invention.

[0031] Figure 6 This is a schematic diagram of the structure of the unidirectional tooth and locking tooth according to an embodiment of the present invention.

[0032] Figure 7 This is a cross-sectional structural diagram of a stop assembly according to an embodiment of the present invention.

[0033] Figure 8 This is a three-dimensional structural diagram of a limiting block according to an embodiment of the present invention.

[0034] In the picture: 1000 Depth adjustment mechanism; 100 Mounting bracket; 110 Base plate; 120 Side plate; 130 Rotating groove; 140 Rotating hole; 200 Electric saw bracket; 210 Threaded adjustment hole; 300 Arc-shaped guide rail; 310 Arc-shaped guide groove; 320 Arc-shaped rack; 321 One-way tooth; 400 Stop assembly; 410 Limit stop; 411 Clamping part; 412 First guide post; 41 3. Limiting part; 414. Mounting cavity; 415. Clearance hole; 416. Clearance opening; 420. Locking block; 421. Locking tooth; 422. Connecting hole; 430. Unlocking button; 431. Second guide post; 432. Connecting post; 433. Threaded hole; 440. Reset spring; 450. Connecting screw; 500. Fine-tuning component; 510. Adjusting screw; 520. Abutment part; 530. Adjusting spring. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings.

[0036] This embodiment discloses a depth adjustment mechanism 1000 for a rail saw, referring to... Figure 1 The depth adjustment mechanism 1000 includes a mounting frame 100, a chainsaw bracket 200, an arc-shaped guide rail 300, and a stop assembly 400. The first end of the chainsaw bracket 200 is vertically rotatably connected to the mounting frame 100. The arc-shaped guide rail 300 is fixedly mounted on the mounting frame 100 and extends in a vertical plane. The stop assembly 400 is disposed on the arc-shaped guide rail 300 and its position can be adjusted along the arc-shaped guide rail 300. The second end of the chainsaw bracket 200 abuts against the top of the stop assembly 400.

[0037] The chainsaw bracket 200 is used to mount the chainsaw body, which includes a saw blade and a drive unit. The drive unit can drive the saw blade to rotate in a vertical plane for cutting operations.

[0038] Reference Figure 1 and Figure 2 The mounting bracket 100 includes a vertically connected base plate 110 and side plate 120. The base plate 110 is horizontally arranged, and the side plate 120 is vertically arranged. A rotating groove 130 is provided on the base plate 110, and the first end of the electric saw bracket 200 is inserted into the rotating groove 130.

[0039] In this embodiment, rotating holes 140 are provided on the inner walls of opposite sides of the rotating groove 130. The electric saw bracket 200 is disposed in front of the side plate 120. A rotating shaft is provided on both the side of the first end of the electric saw bracket 200 near the side plate 120 and the side away from the side plate 120. The two rotating shafts are coaxially arranged and respectively cooperate with the two rotating holes 140 to realize the rotating connection between the first end of the electric saw bracket 200 and the mounting bracket 100. In addition, in other embodiments, other suitable methods can also be used to realize the rotating connection of the first end of the electric saw bracket 200, such as setting the rotating hole 140 at the first end of the electric saw bracket 200 and setting the rotating shaft on the base plate 110; or using a hinge connection between the electric saw bracket 200 and the mounting bracket 100.

[0040] The arc-shaped guide rail 300 and the stop assembly 400 are disposed at the second end of the chainsaw bracket 200 (i.e., the end of the chainsaw bracket 200 away from the rotating groove 130). In this embodiment, the arc-shaped guide rail 300 is fixedly connected to the side plate 120, and the arc-shaped guide rail 300 is arranged parallel to the side plate 120.

[0041] The arc-shaped guide rail 300 has an arc-shaped guide groove 310 extending along the arc-shaped guide rail 300. The stop block assembly 400 cooperates with the arc-shaped guide groove 310 and can move along the arc-shaped guide groove 310 to adjust its position. When the stop block assembly 400 supports the second end of the electric saw bracket 200 at different positions of the arc-shaped guide groove 310, the electric saw bracket 200 rotates around the first end of the electric saw bracket 200 at different angles, so that the cutting depth of the saw blade changes to adapt to different cutting needs.

[0042] In this embodiment, the arc-shaped guide groove 310 is centered on the rotating hole 140 and the rotating shaft, so that when the stop assembly 400 moves along the arc-shaped guide groove 310 and the chainsaw bracket 200 rotates around the first end to adjust the cutting depth, the stop assembly 400 can stably abut against the second end supporting the chainsaw bracket 200. Furthermore, in other embodiments, when the contact area between the stop assembly 400 and the second end of the chainsaw bracket 200 is sufficiently large, the arc-shaped guide groove 310 may not be centered on the rotating hole 140 and the rotating shaft; in this case, the abutment between the stop assembly 400 and the second end of the chainsaw bracket 200 can still be maintained.

[0043] Reference Figure 1 In this embodiment, the front side of the arc-shaped guide rail 300 is provided with a scale line parallel to the arc-shaped guide groove 310. The scale line records the depth reading value. When the stop block assembly 400 moves to the corresponding depth reading value, the user can easily read the current cutting depth of the saw blade.

[0044] Reference Figure 1 , Figure 3 and Figure 4 In this embodiment, the stop assembly 400 includes a limiting stop 410, a locking block 420, and an unlocking button 430. The limiting stop 410 is disposed on the front side of the arc-shaped guide rail 300 and can move along the arc-shaped guide groove 310. The second end of the chainsaw bracket 200 abuts against the upper side of the limiting stop 410.

[0045] A locking block 420 is disposed on the side of the arc-shaped guide rail 300 opposite to the limiting block 410 and is movably connected to the limiting block 410. The locking block 420 can cooperate with the arc-shaped guide rail 300 to lock the limiting block 410. The limiting block 410 is locked onto the arc-shaped guide rail 300 by the locking block 420, so that the limiting block 410 can stably support the electric saw bracket 200 below the second end of the electric saw bracket 200, so that the saw blade on the electric saw bracket 200 maintains the current cutting depth. The unlock button 430 is located on the side of the arc-shaped guide rail 300 away from the locking block 420 and is connected to the locking block 420. The unlock button 430 can drive the locking block 420 away from the arc-shaped guide rail 300 to release the lock on the limit stop 410.

[0046] Specifically, refer to Figures 4 to 6The arc-shaped guide rail 300 has an arc-shaped rack 320 parallel to the arc-shaped guide groove 310 on the side opposite to the limiting block 410, and the locking block 420 has locking teeth 421 that mesh with the arc-shaped rack 320. The unlocking button 430 can move closer to or further away from the arc-shaped guide rail 300 to move the locking block 420 away from or closer to the arc-shaped rack 320.

[0047] In this embodiment, two arc-shaped racks 320 are provided, and the two arc-shaped racks 320 extend along the two long sides of the arc-shaped guide groove 310 respectively. The width of the locking block 420 is greater than the width of the arc-shaped guide groove 310, and both ends of the locking block 420 extend to the rear side of the two arc-shaped racks 320 and are respectively provided with locking teeth 421 that mesh with the two arc-shaped racks 320.

[0048] Therefore, when the cutting depth needs to be adjusted, the user presses the unlock button 430, causing the unlock button 430 to move towards the arc-shaped guide rail 300, which drives the locking tooth 421 to move away from the arc-shaped rack 320 to release the engagement between the locking tooth 421 and the arc-shaped rack 320. At this time, the stop block assembly 400 can be moved along the arc-shaped guide groove 310 and the electric saw bracket 200 can be rotated around the first end of the electric saw bracket 200 to adjust the cutting depth of the saw blade.

[0049] After the saw blade cutting depth is adjusted, the unlock button 430 moves away from the arc guide rail 300, causing the locking tooth 421 to move closer to the arc rack 320 so that the locking tooth 421 engages with the guide rack, locking the stop assembly 400 on the arc guide rail 300.

[0050] Reference Figures 4 to 6 In this embodiment, the arc-shaped rack 320 includes a plurality of unidirectional teeth 321 arranged parallel to the length direction of the arc-shaped guide groove 310. The upper side of the unidirectional teeth 321 is a plane, and the lower side of the unidirectional teeth 321 is an inclined plane. The upper side of the locking teeth 421 is an inclined plane, and the lower side of the locking teeth 421 is a plane.

[0051] When the locking tooth 421 engages with the one-way tooth 321, the upper side of the locking tooth 421 is in contact with the lower side of the upper one-way tooth 321, and the lower side of the locking tooth 421 is in contact with the upper side of the lower one-way tooth 321. The upper side of the one-way tooth 321 is flat, and correspondingly, the lower side of the locking tooth 421 is flat, thus preventing the locking tooth 421 from sliding downwards and disengaging from the one-way tooth 321, allowing the stop assembly 400 to stabilize the second end of the chainsaw bracket 200. The lower side of the one-way tooth 321 is inclined, and correspondingly, the upper side of the locking tooth 421 is inclined, allowing the stop assembly 400 to slide upwards to adjust the saw blade cutting depth even without pressing the unlock button 430 to disengage the locking tooth 421 and the one-way tooth 321.

[0052] In addition, in other embodiments, the locking tooth 421 and the one-way tooth 321 may also be in other suitable forms.

[0053] In this embodiment, the unlock button 430 and the locking block 420 are respectively located on opposite sides of the arc-shaped guide rail 300. The block assembly 400 can be unlocked by pressing the unlock button 430 perpendicular to the arc-shaped guide rail 300 from one side. There is no need to pinch the unlock button 430 and the locking block 420 from both sides. This makes it convenient for the user to keep the block assembly 400 in the unlocked state and adjust the position of the block assembly 400 along the arc-shaped guide groove 310. The block assembly 400 has a compact and reasonable structure and is easy to operate.

[0054] Reference Figure 3 and Figure 4 In this embodiment, the unlock button 430 abuts against a reset spring 440 on the side facing the arc-shaped guide rail 300. When unlocking the stop assembly 400, the user presses the unlock button 430 towards the arc-shaped guide rail 300. The unlock button 430 compresses the reset spring and causes the locking block 420 to disengage from the arc-shaped rack 320. After adjusting the position of the stop assembly 400, the user only needs to release the unlock button 430. The reset spring will then drive the unlock button 430 to move away from the arc-shaped guide rail 300 to reset, causing the locking block 420 to move towards the arc-shaped rack 320 to engage with it, thus facilitating locking of the stop assembly 400 after adjustment.

[0055] Combination Figure 7 In this embodiment, the limiting block 410 has a pressing part 411, which extends between the arc-shaped guide rail 300 and the unlock button 430 and fits against the arc-shaped guide rail 300. The end of the reset spring 440 away from the unlock button 430 abuts against the pressing part 411. The reset spring 440 abuts against the pressing part 411 and the unlock button 430, thereby pressing the pressing part 411 against the arc-shaped guide rail 300, making the overall structure of the block assembly 400 more stable and compact.

[0056] Reference Figure 7 In this embodiment, the pressing part 411 has a first guide post 412 protruding on the side away from the arc-shaped guide rail 300, and the unlocking button 430 has a second guide post 431 protruding on the side facing the arc-shaped guide rail 300. The opposite ends of the reset spring 440 are respectively sleeved on the first guide post 412 and the second guide post 431, so that the reset spring 440 is stably set between the unlocking button 430 and the pressing part 411, and the reset spring is more stable when compressed and when it returns to its original position.

[0057] Reference Figure 7 and Figure 8The limit stop 410 has a limit part 413, which blocks the movement path of the unlock button 430 to limit the travel of the unlock button 430 away from the arc-shaped guide rail 300, thus preventing the unlock button 430 from protruding excessively from the limit stop 410. The contact between the limit part 413 and the unlock button 430 also transfers the load borne by the limit stop 410 to the unlock button 430 and the locking block 420, making the structure of the stop assembly 400 more reasonable and stable.

[0058] Specifically, refer to Figure 8 In this embodiment, the limiting block 410 has an installation cavity 414, and the unlocking button 430 is disposed in the installation cavity 414 to reduce the volume of the block assembly 400 and make the block assembly 400 more compact.

[0059] The limiting block 410 has a clearance hole 415 facing the arc-shaped guide rail 300 on the side facing the arc-shaped guide groove 310. The clearance hole 415 connects to the mounting cavity 414. The unlocking button 430 passes through the clearance hole 415 and the arc-shaped guide groove 310 and connects to the locking block 420. The limiting block 410 has a clearance opening 416 on the side away from the arc-shaped guide rail 300, which connects to the mounting cavity 414. The side of the unlocking button 430 away from the arc-shaped guide rail 300 cooperates with the clearance opening 416.

[0060] Reference Figure 4 , Figure 7 and Figure 8 In this embodiment, one end of the unlock button 430 is rotatably connected to the limiting block 410 in a vertical direction. Specifically, the unlock button 430 is pivotally connected to the inner wall of the mounting cavity 414. The end of the unlock button 430 away from its rotational connection point with the limiting block 410 is fitted with a clearance opening 416. The user can operate the unlock button 430 from the clearance opening 416. The unlock button 430 can rotate around the rotational connection point to move closer to or away from the arc-shaped guide rail 300.

[0061] The limiting part 413 is formed by the side wall of the clearance opening 416. When the locking block 420 is engaged and locked to the arc-shaped rack 320, the side of the unlocking button 430 away from the arc-shaped guide rail 300 abuts against the limiting part 413. Thus, the vertical force of the limiting block 410 is transmitted to the unlocking button 430 through the rotational connection point of the limiting block 410 and the unlocking button 430 and the side wall (limiting part 413) of the clearance opening 416, so that the block assembly 400 can better withstand the vertical force in order to support the second end of the chainsaw bracket 200.

[0062] In this embodiment, the clamping part 411 corresponds to the bottom wall of the mounting cavity 414 facing the clearance opening 416. When the stop block assembly 400 is locked on the arc-shaped guide rail 300, the reset spring 440 abuts against the bottom wall of the mounting cavity 414 and the unlock button 430, driving the unlock button 430 to press against the limiting part 413, so that the unlock button 430 can better vertically support the limiting stop block 410.

[0063] In this embodiment, the locking block 420 is connected to the unlocking button 430, and the unlocking button 430 is rotatably connected to the limiting block 410, thereby achieving the connection between the locking block 420 and the limiting block 410. In other embodiments, other methods can also be used to connect the locking block 420 and the limiting block 410. For example, in one embodiment, the unlocking button 430 is not rotatably connected to the limiting block 410, and the limiting block 410 has a through hole. The unlocking button 430 and the locking block 420 are slidably mounted in the through hole of the limiting block 410 along a direction perpendicular to the arc-shaped guide rail 300. By pressing the unlocking button 430, the locking block 420 can be driven away from the limiting block 410 and the arc-shaped rack 320. In one embodiment, the unlock button 430 is not rotatably connected to the limit block 410, the locking block 420 is rotatably connected to the limit block 410, and the unlock button 430 is connected to the locking block 420. Pressing the unlock button 430 can drive the locking block 420 to rotate away from the limit block 410 and the arc rack 320.

[0064] Reference Figure 4 and Figure 7 In this embodiment, a connecting post 432 is connected to the side of the unlock button 430 facing the arc-shaped guide rail 300, and the connecting post 432 passes through the arc-shaped guide groove 310. The connecting post 432 has a threaded hole 433, and the locking block 420 has a connecting hole 422 communicating with the threaded hole 433. A connecting screw 450 passes through both the threaded hole 433 and the connecting hole 422. The unlock button 430 and the locking block 420 are connected by the connecting screw 450 passing through the connecting hole 422 and the threaded hole 433, resulting in a strong connection between the unlock button 430 and the locking block 420 and convenient installation. Simultaneously, the connecting post 432, passing through the arc-shaped guide groove 310, can guide the stop assembly 400 as it slides along the arc-shaped guide groove 310, making the movement of the stop assembly 400 more stable and smooth.

[0065] Reference Figure 1 and Figure 3 The second end of the chainsaw bracket 200 is connected to a fine-tuning component 500, which abuts against the upper side of the limit block 410 and can adjust the distance between the second end of the chainsaw bracket 200 and the limit block 410.

[0066] Specifically, the fine-tuning component 500 includes an adjusting screw 510 and an abutment portion 520. The abutment portion 520 abuts against the upper side of the limiting block 410, and the adjusting screw 510 is connected to the side of the abutment portion 520 away from the limiting block 410. The second end of the electric saw bracket 200 has a threaded adjusting hole 210 that engages with the adjusting screw 510. By rotating the adjusting screw 510, the distance from the abutment portion 520 to the second end of the electric saw bracket 200 can be finely adjusted, thereby achieving fine-tuning of the saw blade cutting depth. This arrangement makes the fine-tuning component 500 and the block assembly 400 independent of each other, and adjusting the position of the block assembly 400 and adjusting the fine-tuning component 500 do not interfere with each other, making it convenient for users to operate.

[0067] In this embodiment, the abutment portion 520 is a cap-shaped member coaxially disposed with the adjusting screw 510. The outer periphery of the abutment portion 520 is provided with friction texture so that the user can grip the abutment portion 520 to rotate the adjusting screw 510. In addition, in other embodiments, the abutment portion 520 may also take other suitable forms.

[0068] In this embodiment, an adjusting spring 530 is sleeved on the adjusting screw 510. One end of the adjusting spring 530 abuts against the abutment portion 520, and the other end of the adjusting spring 530 away from the abutment portion 520 abuts against the second end of the electric saw bracket 200. The adjusting spring 530 can apply an axial force to the adjusting screw 510, so that the adjusting screw 510 is stably engaged in the threaded adjusting hole 210, and the adjusting screw 510 is not easily loosened by the vibration of the track saw during operation, thus affecting the accuracy of the track saw height adjustment.

[0069] In other embodiments, the adjusting spring 530 may be omitted.

[0070] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A depth adjustment mechanism for a rail saw, characterized in that, The depth adjustment mechanism (1000) includes: Mounting bracket (100); A chainsaw bracket (200), the first end of which is rotatably connected to the mounting bracket (100) in a vertical manner; An arc-shaped guide rail (300) is fixedly mounted on the mounting bracket (100). The arc-shaped guide rail (300) has an arc-shaped guide groove (310) extending along the arc-shaped guide rail (300). The arc-shaped guide rail (300) is provided with an arc-shaped rack (320) parallel to the arc-shaped guide groove (310). A stop assembly (400), the stop assembly (400) comprising: A limiting block (410) is provided on the arc-shaped guide rail (300). The limiting block (410) can move along the arc-shaped guide groove (310). The second end of the electric saw bracket (200) abuts against the upper side of the limiting block (410). A locking block (420) is disposed on the side of the arc-shaped guide rail (300) away from the limiting block (410) and is movably connected to the limiting block (410). The locking block (420) is provided with locking teeth (421) that mesh with the arc-shaped rack (320). An unlock button (430) is provided on the side of the arc-shaped guide rail (300) away from the locking block (420) and connected to the locking block (420); the unlock button (430) can move closer to or away from the arc-shaped guide rail (300) to drive the locking block (420) away from or closer to the arc-shaped rack (320).

2. The depth adjustment mechanism for a rail saw as described in claim 1, characterized in that, The stop assembly (400) also includes a reset spring (440) that abuts against the side of the unlock button (430) facing the arc-shaped guide rail (300).

3. The depth adjustment mechanism for a rail saw as described in claim 2, characterized in that, The limiting block (410) has a pressing part (411) that extends between the arc-shaped guide rail (300) and the unlock button (430) and fits against the arc-shaped guide rail (300). The end of the reset spring (440) away from the unlock button (430) abuts against the pressing part (411).

4. The depth adjustment mechanism for a rail saw as described in claim 2, characterized in that, The limiting block (410) has a limiting part (413) that blocks the movement path of the unlock button (430) to limit the travel of the unlock button (430) in a direction away from the arc-shaped guide rail (300).

5. The depth adjustment mechanism for a rail saw as described in claim 4, characterized in that, The limiting block (410) has an installation cavity (414) inside, and the unlocking button (430) is disposed in the installation cavity (414). One end of the unlocking button (430) is rotatably connected to the limiting block (410) in a vertical direction. The limiting block (410) is provided with a clearance opening (416) communicating with the installation cavity (414). The side of the unlocking button (430) away from the arc-shaped guide rail (300) is engaged with the clearance opening (416). The side wall of the clearance opening (416) forms a limiting part (413).

6. The depth adjustment mechanism for a rail saw as described in claim 3, characterized in that, The pressing part (411) has a first guide post (412) protruding on the side away from the arc-shaped guide rail (300), and the unlocking button (430) has a second guide post (431) protruding on the side facing the arc-shaped guide rail (300). The two ends of the reset spring (440) are respectively sleeved on the first guide post (412) and the second guide post (431).

7. The depth adjustment mechanism for a rail saw as described in claim 1, characterized in that, The unlock button (430) is connected to a connecting post (432) on the side facing the arc-shaped guide rail (300). The connecting post (432) passes through the arc-shaped guide groove (310). The connecting post (432) has a threaded hole (433). The locking block (420) has a connecting hole (422) that communicates with the threaded hole (433). A connecting screw (450) passes through the threaded hole (433) and the connecting hole (422).

8. The depth adjustment mechanism for a rail saw as described in claim 1, characterized in that, The arc-shaped rack (320) includes a plurality of unidirectional teeth (321) arranged parallel to the length direction of the arc-shaped guide groove (310). The upper side of the unidirectional teeth (321) is a plane, and the lower side of the unidirectional teeth (321) is an inclined plane. The upper side of the locking teeth (421) is an inclined plane, and the lower side of the locking teeth (421) is a plane.

9. The depth adjustment mechanism for a rail saw as described in claim 1, characterized in that, The second end of the chainsaw bracket (200) is connected to a fine-tuning component (500). The fine-tuning component (500) includes an adjusting screw (510) and an abutment (520). The abutment (520) abuts against the upper side of the limiting block (410). The adjusting screw (510) is connected to the side of the abutment (520) away from the limiting block (410). The second end of the chainsaw bracket (200) is provided with a threaded adjusting hole (210) that is threadedly engaged with the adjusting screw (510).

10. The depth adjustment mechanism for a rail saw as described in claim 9, characterized in that, An adjusting spring (530) is provided on the adjusting screw (510). One end of the adjusting spring (530) abuts against the abutment part (520), and the other end of the adjusting spring (530) away from the abutment part (520) abuts against the second end of the electric saw bracket (200).

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