Track saw with cutting depth control structure

Abstract

The utility model relates to a track saw with a cutting depth control structure, which comprises a machine body, a cutting part and a saw blade, the machine body is provided with an adjusting device, the adjusting device comprises a gear knob, a gear cam and a gear pin, the gear knob is coaxially connected with the gear cam, and the gear pin is connected with the cutting part. The top surface of the gear cam corresponds to a shallow cutting gear, a saw blade changing gear and a free cutting gear; the bottom face of the gear pin abuts against the top face of the gear cam, and the top face extends out of the machine body. A lower fixing cover and a positioning piece are arranged on the side, close to the machine body, of the cutting part, when the cutting part is located at the shallow cutting gear, the gear pin abuts against the shallow cutting groove, when the cutting part is located at the saw blade changing gear, the gear pin abuts against the positioning piece, and when the cutting part is located at the free cutting gear, the gear pin does not make contact with the cutting part. The gear switching function is integrated through the gear knob, the shallow cutting gear, the saw blade changing gear and the free cutting gear can be switched in a rotating mode, cutting gear adjustment is achieved, and the machining efficiency of the track saw can be improved easily.

Description

Technical Field

[0001] This utility model belongs to the field of track saw technology, and specifically relates to a track saw with a cutting depth control structure. Background Technology

[0002] In the field of power tools, the rail saw, as a highly efficient and precise cutting device, directly impacts processing quality and work efficiency through the control accuracy of its cutting depth and ease of operation. While the depth control structure of traditional rail saws has evolved over many years and can meet basic functional requirements, it still faces numerous technical bottlenecks and design flaws in practical applications. These are manifested in three core issues: fragmented functional modules, cumbersome operating procedures, and complex structures. These problems have become key obstacles restricting the improvement of rail saw performance.

[0003] From a mechanical design perspective, the depth control mechanism of existing rail saws generally adopts a split layout. Taking a typical mechanical limit structure as an example, its depth adjustment function usually relies on a mechanical combination of independently set limit blocks, screw fine-tuning devices, and scales. This type of design requires the operator to complete three independent steps: coarse adjustment of the limit block position, fine-tuning of the screw, and scale verification. The functional modules are physically distributed. For example, the limit block is installed at the end of the base guide rail, the fine-tuning screw is located on the side of the machine body, and the depth scale is often located in a position that is difficult for the operator to directly observe. This spatial separation results in an excessively long functional execution path, requiring the operator to frequently switch operating areas during adjustment, which not only increases the risk of misoperation but also significantly reduces the overall structural coordination. The rail saw design disclosed in US Patent US20170203407A1 has this problem, with its depth locking knob and fine-tuning knob located on opposite sides of the machine body. The operator needs to alternate between both hands to complete the depth setting, which can easily cause tool collisions in a narrow working space. More notably, such split structures often require additional connecting rods and transmission mechanisms to achieve functional linkage. This not only increases the number of parts but also extends the assembly tolerance chain, directly affecting the final assembly accuracy.

[0004] Traditional mechanical depth adjustment mechanisms often employ multi-stage operational logic, such as the standard procedure of first unlocking the limit device, then sliding the adjustment base, and finally tightening the fixing bolts. Research data from a German manufacturer shows that, on average, operators need to perform six independent actions to complete a single depth setting, taking approximately 22 seconds. The torque application action of tightening the bolts alone accounts for 40% of the total time. This operational complexity is particularly pronounced in applications requiring frequent depth adjustments, directly leading to decreased work efficiency and increased operator fatigue.

[0005] As can be seen from the above, the shortcomings of the existing track saw depth control structure are that the functional structure is relatively dispersed or incomplete, the operation is relatively cumbersome, and the complex structure makes assembly and processing difficult. Therefore, it cannot effectively improve the processing efficiency of the track saw. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a rail saw with a cutting depth control structure. The rail saw integrates a gear switching function through a gear knob, which can rotate to switch between three gears: shallow cutting gear, saw blade changing gear, and free cutting gear. This allows for convenient adjustment of the cutting gear, simple operation, and improves the processing efficiency of the rail saw.

[0007] This utility model provides a rail saw with a cutting depth control structure, including a main body, a cutting section, and a saw blade. The main body is rotatably connected to the cutting section. The saw blade is mounted on the main body and placed inside the cutting section. An adjustment device is provided on the side of the main body near the cutting section. The adjustment device includes a gear knob, a gear cam, and a gear pin. The gear knob is coaxially connected to the gear cam. The top surface of the gear cam is a three-segment curved surface, corresponding to shallow cutting, blade changing, and free cutting modes, respectively. The gear pin... A spring is fitted onto the cutting part, with one end abutting against the bottom of the shift pin and the other end abutting against the bottom of the shift knob. The bottom surface of the shift pin abuts against the top surface of the shift cam, with the top surface extending beyond the main body of the machine. A lower fixing cover and a positioning plate are located on the side of the cutting part near the main body. The lower fixing cover has a shallow cutting groove, and the positioning plate is mounted on the lower fixing cover. When in the shallow cutting position, the shift pin abuts against the shallow cutting groove; when in the saw blade changing position, the shift pin abuts against the positioning plate; and when in the free cutting position, the shift pin does not contact the cutting part. The three-segment curved surface structure of the shift cam corresponds to the shallow cutting, saw blade changing, and free cutting positions. The spring in the shift pin contacts the shift cam, changing the extension length of the shift pin as the shift cam rotates, thus changing the contact point between the shift pin and the cutting part in the main body of the machine, achieving multi-position adjustment. When in shallow cutting mode, the stop pin abuts against the shallow cutting groove. When in blade changing mode, the stop pin abuts against the positioning plate. When in free cutting mode, the stop pin does not contact the cutting part. The stop knob integrates the gear switching function, and three gears (shallow cutting mode, blade changing mode, and free cutting mode) can be rotated to switch between them, realizing the adjustment of the cutting gear. The adjustment is convenient and the operation is simple.

[0008] Preferably, it further includes a depth adjustment device, which includes a depth positioning slide rail, a depth positioning block, a locking knob, a depth positioning pin, a fine-tuning knob, and a fine-tuning positioning pin. The depth positioning slide rail is provided with a depth mark and a slide rail, and is fixedly installed on the lower fixed cover. The depth positioning block is installed on the depth positioning slide rail and is provided with an indicator part, which is aligned with the depth mark. A depth positioning bolt and a fine-tuning positioning bolt are fixedly provided inside the depth positioning block. The top of the depth positioning pin is fixedly connected to the locking knob, and the depth positioning pin is inserted horizontally into the depth positioning block and connected to the depth positioning bolt. Its bottom is inserted into the slide rail and abuts against the lower fixed cover. The top of the fine-tuning positioning pin is fixedly connected to the fine-tuning knob, and the fine-tuning positioning pin is inserted vertically into the depth positioning block and connected to the fine-tuning bolt. The cutting depth can be quickly adjusted and initially positioned by the cooperation structure of the depth positioning slide rail, depth positioning block and depth positioning pin. The length of the exposed fine-adjustment positioning pin can be controlled by rotating the fine-adjustment knob, so as to achieve the effect of fine adjustment, making the cutting depth adjustment more precise and improving the processing efficiency of the track saw.

[0009] Preferably, a fine-tuning spring is fitted onto the fine-tuning positioning pin, and the fine-tuning spring is located between the fine-tuning knob and the fine-tuning bolt. This allows for higher adjustment accuracy of the fine-tuning positioning pin.

[0010] Preferably, the positioning plate is provided with an elastic buckle and a positioning hole. This facilitates the positioning pin when switching to the saw blade change position.

[0011] Preferably, the main body of the machine has a grip portion, which includes a front cover and a rear cover. The gear shift cam is installed inside the grip portion, and the gear shift knob is located on the outer surface of the front cover. The outer surface of the front cover has a gear shift indicator. The gear can be quickly adjusted using the gear shift indicator.

[0012] This utility model has the following technical effects:

[0013] 1. The three-section curved surface structure of the gear shift cam corresponds to the shallow cutting mode, saw blade changing mode, and free cutting mode. The spring in the gear shift pin contacts the gear shift cam, and the extension length of the gear shift pin changes with the rotation of the cam, thus changing the contact point between the gear shift pin and the cutting part in the machine body, achieving multi-level adjustment. In the shallow cutting mode, the gear shift pin abuts against the shallow cutting groove; in the saw blade changing mode, the gear shift pin abuts against the positioning plate; and in the free cutting mode, the gear shift pin does not contact the cutting part. The gear shift knob integrates the gear switching function, allowing rotation to switch between the three modes: shallow cutting, saw blade changing, and free cutting, achieving convenient and simple cutting level adjustment.

[0014] 2. The cutting depth can be quickly adjusted and initially positioned by the cooperation structure of the depth positioning slide rail, depth positioning block and depth positioning pin. The length of the exposed fine-adjustment positioning pin can be controlled by rotating the fine-adjustment knob, so as to achieve the effect of fine adjustment, making the cutting depth adjustment more precise and improving the processing efficiency of the track saw. Attached Figure Description

[0015] Figure 1 A schematic diagram of a rail saw with a cutting depth control structure, omitting the front cover of the handle section;

[0016] Figure 2 This is a schematic diagram of a rail saw with a cutting depth control structure.

[0017] Figure 3 This is a schematic diagram of another perspective on a track saw knot with a cutting depth control structure.

[0018] Figure 4 This is a schematic diagram of another perspective of a rail saw with a cutting depth control structure.

[0019] In the diagram: 1. Main body; 2. Cutting section; 3. Saw blade; 4. Adjustment device; 41. Gear knob; 42. Gear pin; 43. Gear cam; 44. Spring; 5. Lower fixed cover; 6. Positioning plate; 61. Elastic buckle; 62. Positioning hole; 7. Depth adjustment device; 71. Depth positioning slide rail; 72. Depth positioning block; 73. Locking knob; 74. Depth positioning pin; 75. Fine adjustment knob; 76. Fine adjustment positioning pin; 77. Depth indicator; 78. Slide rail; 79. Indicator; 8. Fine adjustment spring; 9. Handle; 10. Handle front cover; 11. Handle rear cover; 12. Gear indicator. Detailed Implementation

[0020] To make the objectives, technical solutions and advantages of this utility model clearer, the following detailed description of this utility model is provided in conjunction with the accompanying drawings.

[0021] like Figure 1 As shown, a rail saw with a cutting depth control structure includes a main body 11, a cutting section 2, and a saw blade 3. The main body 11 is rotatably connected to the cutting section 2, and the saw blade 3 is mounted on the main body 11 and placed inside the cutting section 2. Figure 2As shown, the main body 11 of the machine is provided with an adjustment device 4 near the cutting section 2. The adjustment device 4 includes a gear knob 41, a gear cam 43, and a gear pin 42. The gear knob 41 and the gear cam 43 are coaxially connected. The top surface of the gear cam 43 is a three-segment curved surface, corresponding to the shallow cutting gear, the saw blade changing gear, and the free cutting gear, respectively. A spring 44 is fitted on the gear pin 42. One end of the spring 44 abuts against the bottom end of the gear pin 42, and the other end abuts against the bottom of the gear knob 41. The bottom surface of the gear pin 42 abuts against the top surface of the gear cam 43, and the top surface extends out of the main body 11 of the machine. Figure 3 As shown, the cutting section 2 is provided with a lower fixing cover 5 and a positioning plate 6 on the side near the machine body 11. The lower fixing cover 5 has a shallow cutting groove, and the positioning plate 6 is installed on the lower fixing cover 5. When in the shallow cutting position, the stop pin 42 abuts against the shallow cutting groove. When in the saw blade changing position, the stop pin 42 abuts against the positioning plate 6. When in the free cutting position, the stop pin 42 does not contact the cutting section 2. The top surface of the stop cam 43 has a three-segment curved surface structure to correspond to the shallow cutting position, saw blade changing position, and free cutting position. Through the structure of the spring 44 in the stop pin 42 contacting the stop cam 43, the extension length of the stop pin 42 changes with the rotation of the stop cam 43, thereby changing the contact position between the stop pin 42 and the cutting section 2 in the machine body 11, thus achieving multi-position adjustment. When in the shallow cutting mode, the stop pin 42 abuts against the shallow cutting groove. When in the saw blade changing mode, the stop pin 42 abuts against the positioning piece 6. When in the free cutting mode, the stop pin 42 does not contact the cutting part 2. The stop knob 41 integrates the stop function, which can rotate to switch between the three modes: shallow cutting mode, saw blade changing mode, and free cutting mode, so as to realize the adjustment of the cutting mode. The adjustment is convenient and the operation is simple.

[0022] like Figure 4As shown, it also includes a depth adjustment device 7, which includes a depth positioning slide rail 71, a depth positioning block 72, a locking knob 73, a depth positioning pin 74, a fine-tuning knob 75, and a fine-tuning positioning pin 76. The depth positioning slide rail 71 is provided with a depth mark 77 and a slide rail 78, and is fixedly installed on the lower fixed cover 5. The depth positioning block 72 is installed on the depth positioning slide rail 71, and the depth positioning block 72 is provided with an indicator 79, which is aligned with the depth mark 77. A depth positioning bolt and a fine-tuning positioning bolt are fixedly provided inside the depth positioning block 72. The top of the depth positioning pin 74 is fixedly connected to the locking knob 73, and the depth positioning pin 74 is horizontally inserted into the depth positioning block 72 and connected to the depth positioning bolt. Its bottom is inserted into the slide rail 78 and abuts against the lower fixed cover 5. The top of the fine-tuning positioning pin 76 is fixedly connected to the fine-tuning knob 75, and the fine-tuning positioning pin 76 is vertically inserted into the depth positioning block 72 and connected to the fine-tuning bolt. The cutting depth can be quickly adjusted and initially positioned by the cooperation structure of the depth positioning slide rail 71, the depth positioning block 72 and the depth positioning pin 74. The length of the exposed fine-adjustment positioning pin 76 can be controlled by rotating the fine-adjustment knob 75, thereby achieving the effect of fine adjustment, making the cutting depth adjustment more precise, which is conducive to improving the processing efficiency of the track saw.

[0023] A fine-tuning spring 8 is fitted onto the fine-tuning positioning pin 76, and the fine-tuning spring 8 is located between the fine-tuning knob 75 and the fine-tuning bolt. This allows for higher adjustment precision of the fine-tuning positioning pin 76.

[0024] The positioning plate 6 is provided with an elastic buckle 61 and a positioning hole 62. This facilitates the positioning pin 42 when cutting to the saw blade change position.

[0025] The main body 11 of the machine is provided with a handle 9, which includes a front cover 10 and a rear cover 11. The gear shift cam 43 is installed inside the handle 9, and the gear shift knob 41 is located on the outer surface of the front cover 10. The gear shift knob 41 has a gear position indicator 12 arrow, and the outer surface of the front cover 10 has a gear position indicator 12, which includes "shallow cutting", "blade change", and "free cutting". The gear can be quickly adjusted using the gear position indicator 12.

[0026] The method of using a rail saw with a cutting depth control structure is as follows:

[0027] When the shallow cut mode is needed, rotate the gear knob 41 on the front cover 10 of the handle so that the arrow on the gear indicator 12 of the gear knob 41 is aligned with the shallow cut mode in the gear indicator 12. Observe that the gear pin 42 pops out automatically, rotate the main body 11 so that the gear pin 42 precisely engages with the shallow cut groove of the lower fixed cover 5, and the cutting part 2 is locked in the preset shallow cut position (typical depth 3-5mm). It is suitable for cutting fragile materials such as veneer and thin wood veneer. When the blade change mode is needed, rotate the gear knob 41 on the front cover 10 of the handle so that the arrow on the gear indicator 12 of the gear knob 41 is aligned with the blade change mode in the gear indicator 12. You will hear a "click" sound from the elastic buckle 61. The top of the gear pin 42 is inserted into the positioning hole 62 of the positioning plate 6, and the machine body stops rotating. Use a special wrench to replace the saw blade 3.

[0028] When the free cutting mode is needed, rotate the gear knob 41 on the front cover 10 of the grip to align the arrow of the gear position mark 12 on the gear knob 41 with the free cutting mode in the gear position mark 12. The gear pin 42 retracts completely and no longer contacts the cutting part 2, releasing the mechanical limit on the cutting part 2. The cutting part 2 can move freely up and down, and the free cutting range can be achieved in conjunction with the depth adjustment device 7.

[0029] When using the depth adjustment device 7, first loosen the locking knob 73 on the depth positioning block 72, slide the depth positioning block 72 along the depth positioning slide rail 78, align the arrow on the indicator 79 with the corresponding desired depth value in the depth mark 77, observe the accuracy of the value, and make fine adjustments. During fine adjustments, rotate the fine adjustment knob 75 clockwise; as the fine adjustment positioning pin 76 moves down, observe the value on the depth mark 77, and fine-tune to the desired value. Then, push the main body 11 and the depth adjustment device 7 to complete the depth adjustment.

[0030] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A track saw with a cutting depth control structure, comprising a machine body, a cutting part, and a saw blade, the machine body is rotatably connected with the cutting part, the saw blade is installed on the machine body and placed in the cutting part, characterized in that, The side of the body near the cutting part is provided with an adjusting device, which comprises a gear knob, a gear cam and a gear pin. The gear knob is coaxially connected with the gear cam. The top surface of the gear cam is a three-section curved surface, which corresponds to a shallow cutting gear, a saw blade changing gear and a free cutting gear respectively. A spring is sleeved on the gear pin. One end of the spring abuts against the bottom end of the gear pin, and the other end abuts against the bottom of the gear knob. The bottom surface of the gear pin abuts against the top surface of the gear cam, and the top surface extends out of the body.

2. A track saw with a cutting depth control structure according to claim 1, characterized in that, It also comprises a depth adjusting device, which comprises a depth positioning slide rail part, a depth positioning block, a locking knob, a depth positioning pin, a fine tuning knob and a fine tuning positioning pin. The depth positioning slide rail part is provided with a depth mark and a slide rail, and is fixedly installed on the lower fixing cover. The depth positioning block is installed on the depth positioning slide rail part. The depth positioning block is provided with an indicating part, which is aligned with the depth mark. The depth positioning block is internally fixedly provided with a depth positioning bolt and a fine tuning positioning bolt. The top of the depth positioning pin is fixedly connected with the locking knob. The depth positioning pin is transversely inserted into the depth positioning block and connected with the depth positioning bolt. The bottom of the depth positioning pin is inserted into the slide rail and abuts against the lower fixing cover. The top of the fine tuning positioning pin is fixedly connected with the fine tuning knob. The fine tuning positioning pin is vertically inserted into the depth positioning block and connected with the fine tuning bolt.

3. A track saw with a cutting depth control structure according to claim 2, characterized in that, A fine tuning spring is sleeved on the fine tuning positioning pin, and located between the fine tuning knob and the fine tuning bolt.

4. The rail saw with a cutting depth control structure according to claim 1, wherein The positioning piece is provided with an elastic buckle and a positioning hole.

5. The rail saw with a cutting depth control structure according to claim 1, wherein The body is provided with a handle part, which comprises a handle part front cover and a handle part rear cover. The gear cam is installed in the handle part. The gear knob is located on the outer surface of the handle part front cover. The outer surface of the handle part front cover is provided with a gear mark.

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