Cutting machine

Abstract

A cutting machine comprises a bottom plate, a first angle plate, a second angle plate and a main body part, and an inclination angle fast adjusting mechanism comprises a protrusion and an adjusting pin rotating around a second axis. The adjusting pin comprises opposite surfaces and at least two grooves, each groove comprises an opening and end surfaces, and the shortest distances between the at least two end surfaces and the opposite surfaces are not equal; the protrusions protrude towards the adjusting pin, at least two protrusions are arranged in a stacked mode in the protruding direction of the protrusions, each protrusion is provided with a height difference face opposite to the end face, and at least two height difference faces are distributed in a staggered mode. The protrusions enter the grooves through the openings, and the height difference faces abut against the corresponding end faces. The device has the beneficial effects that the saw blade is rapidly adjusted and positioned to different inclination angles during beveling, operation is convenient and rapid, stability is high, and abrasion is not prone to occurring.

Description

Technical Field

[0001] The present application relates to the technical field of power tools, and more particularly, to a cutting machine. Background Art

[0002] In the related art, a cutting machine is provided. The cutting machine includes a bottom plate placed on a workpiece to be cut, and a main body portion pivotally connected to the bottom plate. A saw blade is provided on the main body portion. During use, the saw blade can be inclined relative to the bottom plate by pivoting the main body portion relative to the bottom plate, so that the saw blade can perform a bevel cut on the workpiece to be cut.

[0003] However, in the cutting machine in the related art, it is difficult to quickly position the inclination angle of the saw blade relative to the bottom plate during bevel cutting. Summary of the Invention

[0004] The present application provides a cutting machine to solve the problem of how to quickly adjust and position the saw blade to different inclination angles during bevel cutting.

[0005] An embodiment of the present application provides a cutting machine, including a bottom plate placed on a workpiece to be cut, a first angle plate fixedly connected to the bottom plate, a second angle plate pivotally connected to the first angle plate, and a main body portion fixedly connected to the second angle plate. The main body portion and the second angle plate pivot relative to the first angle plate about a first axis, and a saw blade is provided on the main body portion. The cutting machine further includes an inclination angle quick adjustment mechanism. The inclination angle quick adjustment mechanism includes an adjustment pin provided on one of the first angle plate and the second angle plate, and a protrusion provided on the other of the first angle plate and the second angle plate. The adjustment pin rotates about a second axis. The adjustment pin includes opposite faces on an axial side close to the protrusion and a groove recessed inward from the opposite faces. One end of the groove is an opening, and an end face is provided at the extended end of the groove. At least two grooves are distributed at intervals around the second axis, and the shortest distances from at least two end faces to the opposite faces are not equal to each other. The protrusion protrudes towards the adjustment pin, and at least two protrusions are arranged in layers along the protruding direction thereof. Each protrusion is provided with a height difference face opposite to the end face, and at least two height difference faces are staggered in the direction along the second axis; the protrusion enters the groove through the opening, and the height difference face abuts against the corresponding end face.

[0006] When the above-mentioned cutting machine is in use, the bottom plate is placed on the workpiece to be cut and fixed relative to the workpiece to be cut. The main body can drive the saw blade to pivot relative to the bottom plate around the first axis, so that the saw blade is inclined relative to the workpiece to be cut, so that the workpiece to be cut can be obliquely cut. Since the second angle plate is fixedly connected to the main body and the first angle plate is fixedly connected to the bottom plate, when the main body rotates around the first axis, the main body drives the second angle plate to pivot relative to the first angle plate around the first axis, so that the adjusting pin and the protrusion rotate relative to each other around the first axis. And since the adjusting pin can rotate around the second axis, the orientation of the opening of the groove of the adjusting pin can be adjusted. Therefore, when oblique cutting is required, the adjusting pin can be rotated to align the opening with the protrusion. Then, when the second angle plate rotates relative to the first angle plate, it can drive the protrusion to slide in the groove after passing through the opening until the protrusion abuts against the end face of the extension end of the groove. Therefore, the second angle plate is prevented from continuing to pivot relative to the first angle plate around the first axis, so that the saw blade is positioned at a specific inclination angle. During the above operation process, only the adjusting pin needs to be rotated to align the opening with the protrusion, and then the main body is driven to pivot the saw blade relative to the bottom plate until it is abutted by the end face. The operation is simple, so that the inclination angle of the saw blade relative to the bottom plate can be quickly positioned.

[0007] In one embodiment, at least two protrusions are connected in sequence, and the protruding amounts of at least two protrusions in the direction towards the adjusting pin change in sequence; an avoidance groove is provided on the adjusting pin, one end of the avoidance groove is connected to the extension end of the corresponding groove, and the other end of the avoidance groove extends along the extension direction of the corresponding groove towards the side away from the groove; the adjusting pin is rotated to align the protrusion with any groove, so as to allow the second angle plate to rotate relative to the first angle plate, so as to drive the protrusion to pass through the opening and slide into the groove until the height difference surface abuts against the corresponding end face, so that the second angle plate is kept in an inclined state where it cannot continue to rotate.

[0008] In one embodiment, the number of protrusions is three, and the three protrusions are the first protrusion, the second protrusion and the third protrusion respectively. The protruding amounts of the first protrusion, the second protrusion and the third protrusion in the direction towards the adjusting pin increase in sequence, and the first protrusion is closer to the adjusting pin than the second protrusion and the third protrusion. The number of grooves is three, and the three grooves are arc grooves with the same radius. The three grooves are the first groove, the second groove and the third groove respectively. The shortest distance from the end face of the first groove to the opposite face is the first distance, the shortest distance from the end face of the second groove to the opposite face is the second distance, and the shortest distance from the end face of the third groove to the opposite face is the third distance. The first distance, the second distance and the third distance increase in sequence. The center line of the first groove is the first arc, the center line of the second groove is the second arc, and the center line of the third groove is the third arc. The centers of the first arc, the second arc and the third arc are arranged at intervals of 120 degrees.

[0009] In one embodiment, a saw blade is provided on the main body portion, and the cutting machine has a first inclined state, a second inclined state, and a third inclined state; in the first inclined state, the height difference surface of the first protrusion abuts against the end surface of the first groove, and the saw blade is inclined 22.5 degrees relative to the bottom plate; in the second inclined state, the height difference surface of the second protrusion abuts against the end surface of the second groove, and the saw blade is inclined 45 degrees relative to the bottom plate; in the third inclined state, the height difference surface of the third protrusion abuts against the end surface of the third groove, and the saw blade is inclined 48 degrees relative to the bottom plate.

[0010] In one embodiment, the number of protrusions is three, and the three protrusions are the first protrusion, the second protrusion, and the third protrusion respectively. The protruding amounts of the first protrusion, the second protrusion, and the third protrusion in the direction of the adjusting pin increase in sequence, and the first protrusion is closer to the adjusting pin than the second protrusion and the third protrusion.

[0011] The number of grooves is two, and the two grooves are the second groove and the third groove respectively. The shortest distance from the end surface of the second groove to the opposite surface is the second distance, and the shortest distance from the end surface of the third groove to the opposite surface is the third distance. The third distance is greater than the second distance. The cutting machine has a first inclined state, a second inclined state, and a third inclined state; in the first inclined state, the height difference surface of the first protrusion abuts against the outer peripheral surface of the adjusting pin; in the second inclined state, the height difference surface of the second protrusion abuts against the end surface of the second groove; in the third inclined state, the height difference surface of the third protrusion abuts against the end surface of the third groove.

[0012] In one embodiment, the end of the relief groove far from the opening penetrates the adjusting pin.

[0013] In one embodiment, at least two grooves are communicated, and the distances from the bottom surfaces of the at least two grooves to the opposite surfaces are the same.

[0014] In one embodiment, the first axis is arranged in parallel with the second axis, and the first axis is located below the lower surface of the bottom plate.

[0015] In one embodiment, the adjusting pin is arranged on the first angle plate, the protrusion is arranged on the second angle plate, the first angle plate is arranged at one end of the bottom plate away from the main body portion, a sliding groove is provided on the first angle plate, a locking member is fixedly connected to the second angle plate by a thread, and the locking member is slidably disposed through the sliding groove.

[0016] In one embodiment, the inclination angle quick adjustment mechanism further includes a knob protruding outside the first angle plate or the second angle plate. The adjusting pin includes an installation portion and an adjusting portion connected to each other. The groove is arranged on the adjusting portion. The installation portion is fixedly connected to the knob, and the adjusting portion is arranged between the first angle plate and the second angle plate; the knob includes an exposed hand operation portion and a feedback protrusion protruding from the back surface of the hand operation portion. A feedback groove is provided on the first angle plate or the second angle plate and is opened toward the feedback protrusion, and the feedback protrusion and the feedback groove slide relative to each other. [Description of the Drawings]

[0017] To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a partial structural schematic diagram of a cutting machine in an embodiment of the present application.

[0019] Figure 2 It is Figure 1 a partial top view of the structure of the cutting machine in the illustrated embodiment.

[0020] Figure 3 It is Figure 1 a structural schematic diagram of the second gusset plate and the static guard in the illustrated embodiment.

[0021] Figure 4 It is Figure 1 a partially enlarged view of the second gusset plate in the illustrated embodiment.

[0022] Figure 5 It is Figure 1 a rear view of the second gusset plate and the static guard in the illustrated embodiment.

[0023] Figure 6 It is Figure 1 a structural schematic diagram of the first gusset plate in the illustrated embodiment.

[0024] Figure 7 It is Figure 1 a bottom view of the first gusset plate in the illustrated embodiment.

[0025] Figure 8 It is Figure 1 a structural schematic diagram of the first gusset plate from another perspective in the illustrated embodiment.

[0026] Figure 9 It is Figure 1 a structural schematic diagram of the adjusting pin in the illustrated embodiment.

[0027] Figure 10 It is Figure 1 a side view of the adjusting pin in the illustrated embodiment.

[0028] Figure 11 It is Figure 1 a front view of the adjusting pin in the illustrated embodiment.

[0029] Figure 12 It is Figure 1Schematic diagram of the structure of the knob in the illustrated embodiment.

[0030] Figure 13 is Figure 1 Schematic diagram of the structure of the knob in the illustrated embodiment from another perspective.

[0031] Figure 14 is Figure 1 Schematic diagram of the assembled state of the first angle plate and the knob in the illustrated embodiment.

[0032] Figure 15 is Figure 1 Front view of the first angle plate and the knob in the illustrated embodiment.

[0033] Figure 16 is Figure 15 Cross-sectional view of the first angle plate, adjusting pin and knob along the M-M line in the illustrated embodiment.

[0034] Figure 17 is Figure 1 Partial schematic diagram of the structure of the cutting machine in the first inclined state in the illustrated embodiment.

[0035] Figure 18 is Figure 1 Partial side view of the structure of the cutting machine in the first inclined state in the illustrated embodiment.

[0036] Figure 19 is Figure 18 Cross-sectional view of the cutting machine along the E-E line in the illustrated embodiment.

[0037] Figure 20 is Figure 1 Partial schematic diagram of the structure of the cutting machine in the second inclined state in the illustrated embodiment.

[0038] Figure 21 is Figure 1 Partial side view of the structure of the cutting machine in the second inclined state in the illustrated embodiment.

[0039] Figure 22 is Figure 21 Cross-sectional view of the cutting machine along the F-F line in the illustrated embodiment.

[0040] Figure 23 is Figure 1 Partial schematic diagram of the structure of the cutting machine in the third inclined state in the illustrated embodiment.

[0041] Figure 24 is Figure 1 Partial side view of the structure of the cutting machine in the third inclined state in the illustrated embodiment.

[0042] Figure 25 is Figure 24Cross-sectional view of the cutting along line G-G in the illustrated embodiment.

[0043] Description of main component symbols:

[0044] Cutting machine - 500; First angle plate - 1; Locking member - 3; Sliding groove - 10; Angle indicating portion - 11; Mode indicating portion - 12; Receiving portion - 13; Second angle plate - 2; Raised bottom surface - 2000; Indicator needle - 21; Static shield - 4; Tilt angle quick adjustment mechanism - 5; Knob - 6; Feedback projection - 60; Hand operation portion - 61; Indicator arrow - 62; Adjusting pin - 7; Adjusting portion - 700; Groove - 70; Opposite surface - 7000; Opening - 71; End face - 72; Second groove - 70b; Second arc - B; Second center - B1; Third groove - 70c; Third arc - C; Third center - C1; Avoidance groove - 75; Mounting portion - 701; Flat position - 73; Card slot - 74; Projection - 8; First projection - 8a; Second projection - 8b; Third projection - 8c; Height difference surface - 81; First height difference surface - 81a; Second height difference surface - 81b; Third height difference surface - 81c; Snap ring - 9; First axis - X1; Second axis - X2. [Detailed implementation manners]

[0045] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0046] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. When an element is considered to be "disposed on" another element, it can be directly disposed on the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific implementation manners and are not intended to limit this application. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0048] Some implementation manners of this application will be described in detail. Without conflict, the following implementation manners and the features in the implementation manners can be combined with each other.

[0049] Figure 1 Partial structural schematic diagram of the cutting machine 500 in an embodiment of the present application; Figure 2 For Figure 1 Top view of the partial structure of the cutting machine 500 in the illustrated embodiment; Figure 3 For Figure 1 Structural schematic diagram of the second angle plate 2 and the static protection cover 4 in the illustrated embodiment; Figure 4 For Figure 1 Partial enlarged view of the second angle plate 2 in the illustrated embodiment; Figure 5 For Figure 1 Rear view of the second angle plate 2 and the static protection cover 4 in the illustrated embodiment; Figure 6 For Figure 1 Structural schematic diagram of the first angle plate 1 in the illustrated embodiment; Figure 7 For Figure 1 Bottom view of the first angle plate 1 in the illustrated embodiment; Figure 8 For Figure 1 Structural schematic diagram of the first angle plate 1 from another perspective in the illustrated embodiment; Figure 9 For Figure 1 Structural schematic diagram of the adjusting pin 7 in the illustrated embodiment; Figure 10 For Figure 1 Side view of the adjusting pin 7 in the illustrated embodiment; Figure 11 For Figure 1 Front view of the adjusting pin 7 in the illustrated embodiment; Figure 12 For Figure 1 Structural schematic diagram of the knob 6 in the illustrated embodiment; Figure 13 For Figure 1 Structural schematic diagram of the knob 6 from another perspective in the illustrated embodiment; Figure 14 For Figure 1 Assembly state schematic diagram of the first angle plate 1 and the knob 6 in the illustrated embodiment; Figure 15 For Figure 1 Front view of the first angle plate 1 and the knob 6 in the illustrated embodiment; Figure 16 For Figure 15 Cross-sectional view of the first angle plate 1, the adjusting pin 7 and the knob 6 along the M-M line in the illustrated embodiment; Figure 17 For Figure 1 Partial structural schematic diagram of the cutting machine 500 in the first inclined state in the illustrated embodiment; Figure 18 For Figure 1 Partial side view of the structure of the cutting machine 500 in the first inclined state in the illustrated embodiment; Figure 19 For Figure 18 Cross-sectional view of the cutting machine 500 along the E-E line in the illustrated embodiment;

[0050] Figure 20 For Figure 1 Partial structural schematic diagram of the cutting machine 500 in the second inclined state in the illustrated embodiment;Figure 21 The Figure 1 partial structural side view of the cutting machine 500 in the second inclined state in the illustrated embodiment; Figure 22 The Figure 21 cross-sectional view of the cutting machine 500 along line F-F in the illustrated embodiment; Figure 23 The Figure 1 partial structural schematic diagram of the cutting machine 500 in the third inclined state in the illustrated embodiment; Figure 24 The Figure 1 partial structural side view of the cutting machine 500 in the third inclined state in the illustrated embodiment; Figure 25 The Figure 24 cross-sectional view of the cutting machine 500 along line G-G in the illustrated embodiment.

[0051] Refer to Figure 1 and Figure 2 , in this embodiment, a cutting machine 500 is provided, which includes a bottom plate (not shown in the figure) placed on the workpiece to be cut, a first angle plate 1 fixedly connected to the bottom plate (see Figures 6 to 8 ), a second angle plate 2 pivotally connected to the first angle plate 1 (see Figures 3 to 5 ), and a main body part (not shown in the figure) fixedly connected to the second angle plate 2. The main body part and the second angle plate 2 pivot relative to the first angle plate 1 about the first axis X1, and a saw blade (not shown in the figure) is provided on the main body part.

[0052] The cutting machine 500 further includes an inclination angle quick adjustment mechanism 5. The inclination angle quick adjustment mechanism 5 includes an adjustment pin 7 provided on one of the first angle plate 1 and the second angle plate 2 (see Figures 9 to 11 ), and a protrusion 8 provided on the other of the first angle plate 1 and the second angle plate 2 (see Figure 4 ). The protrusion 8 protrudes towards the adjustment pin 7, and at least two protrusions 8 are arranged in layers along its protruding direction. As Figures 9 to 11 shown, an arc-shaped groove 70 is formed in the adjustment pin 7. At least two grooves 70 are distributed at intervals along the circumferential direction of the adjustment pin 7, and the depths of at least two grooves 70 are not equal to each other. At least two grooves 70 correspond to at least two protrusions 8 respectively. One end of the groove 70 is an opening 71, and an end face 72 is provided at the extending end of the groove 70. Combining Figure 4 shown, a height difference surface 81 corresponding to the end face 72 is provided at the extending end of the protrusion 8. The height difference surfaces 81 of at least two protrusions 8 are staggered in the extending direction of the protrusion 8. The adjustment pin 7 can rotate about the second axis X2 to align the protrusion 8 with any one of the grooves 70, so as to allow the second angle plate 2 to rotate relative to the first angle plate 1, drive the protrusion 8 to pass through the opening 71 and slide into the groove 70 until the height difference surface 81 abuts against the corresponding end face 72, thereby keeping the second angle plate 2 in an inclined state where it cannot continue to rotate.

[0053] Regarding the dimension design of the protrusion 8, please combineFigure 4 As shown. In some embodiments, the number of the protrusions 8 is three, and the three protrusions 8 are respectively a first protrusion 8a, a second protrusion 8b, and a third protrusion 8c arranged in a stacked manner. In the up-down direction, the first protrusion 8a has a size r, the second protrusion 8b has a size s, and the third protrusion 8c has a size t; the relationship between the sizes is r>s>t, and these sizes are helpful for understanding the following Figure 19 , Figure 22 and Figure 25 . In the protruding direction of the protrusion 8, the distance from the first protrusion 8a to the bottom surface 2000 of the protrusion is f1, the distance from the second protrusion 8b to the bottom surface 2000 of the protrusion is d1, and the distance from the third protrusion 8c to the bottom surface 2000 of the protrusion is e1; the relationship between the sizes is e1>d1>f1, and these sizes affect Figure 9 and Figure 10 the sizes of the second groove 70b and the third groove 70c from the opposite surface 7000; specifically, when the adjusting pin 7 is assembled in place and the inclination angle is 0, the opposite surface 7000 of the adjusting pin 7 is directly opposite to the bottom surface 2000 of the protrusion; at the second inclined position, the avoidance groove 75 of the second groove 70b is opposite to the end face of the first protrusion 8a, that is, the size f of the second groove 70b (see Figure 10 ) is not less than the size f1 of the first protrusion 8a (see Figure 4 ); at the third inclined position, the avoidance groove 75 of the third groove 70c is opposite to the end face of the second protrusion 8b, that is, the size d of the third groove 70c (see Figure 10 ) is not less than the size d1 of the second protrusion 8b (see Figure 4 ); the size e of the bottommost surface of the second groove 70b and the third groove 70c from the opposite surface 7000 (see Figure 10 ) is not less than the size e1 of the third protrusion 8c (see Figure 4 ) to allow the third protrusion 8c to slide in the second groove 70b or the third groove 70c. In some embodiments, the bottommost surfaces of the second groove 70b and the third groove 70c are arranged on the same plane, and the height difference surfaces 81 at different positions are used to abut against the corresponding protrusions 8.

[0054] For the above-mentioned cutting machine 500, during use, the bottom plate is placed on the workpiece to be cut and fixed relative to the workpiece to be cut. The main body can drive the saw blade to pivot relative to the bottom plate around the first axis X1, so that the saw blade is inclined relative to the workpiece to be cut, thereby enabling bevel cutting of the workpiece to be cut. Since the second angle plate 2 is fixedly connected to the main body, and the first angle plate 1 is fixedly connected to the bottom plate, when the main body rotates around the first axis X1, the main body drives the second angle plate 2 to pivot relative to the first angle plate 1 around the first axis X1, so that the adjusting pin 7 and the protrusion 8 rotate relative to each other around the first axis X1. And since the adjusting pin 7 can rotate around the second axis X2, the orientation of the opening 71 of the groove 70 of the adjusting pin 7 can be adjusted. Thus, when bevel cutting is required, the adjusting pin 7 can be rotated to align the opening 71 with the protrusion 8. Then, when the second angle plate 2 rotates relative to the first angle plate 1, it can drive the protrusion 8 to slide through the opening 71 and into the groove 70 until the height difference surface 81 of the extended end of the protrusion 8 abuts against the end surface 72 of the extended end of the groove 70, thereby preventing the second angle plate 2 from continuing to pivot relative to the first angle plate 1 around the first axis X1, that is, positioning the saw blade to a specific inclination angle, which is beneficial to improving the positioning accuracy of the inclination angle of the saw blade. Therefore, rapid and precise positioning of a specific inclination angle can be achieved.

[0055] Since there are at least two grooves 70, and the depths of at least two grooves 70 are not equal to each other, that is, the height difference surfaces 81 of at least two protrusions 8 are staggeredly distributed in the extending direction, different height difference surfaces 81 are respectively used to cooperate with different end surfaces 72, and then the saw blade is respectively positioned to different inclination angles. During use, by rotating the adjusting pin 7 to switch the groove 70 aligned with the protrusion 8, and then turning the protrusion 8 into the groove 70 until the end surface 72 abuts against the corresponding height difference surface 81, the saw blade is positioned to the corresponding inclination angle. Therefore, the above-mentioned cutting machine 500 can achieve rapid adjustment of the inclination angle by rotating the adjusting pin 7 to switch the inclination angle at which the saw blade is positioned, and the switching is achieved through the cooperation of the adjusting pin 7 and the protrusion 8, without the need for other parts, with a simple structure and not easily worn.

[0056] Please refer to Figure 9 As shown, the adjusting pin 7 includes opposite surfaces 7000 on the axial side close to the protrusion 8, and the groove 70 is configured to be recessed inward from the opposite surfaces 7000. Openings 71 and end surfaces 72 are respectively provided at both ends of the groove 70 along its extending direction. Optionally, the groove 70 extends in a plane perpendicular to the second axis X2.

[0057] During use, first rotate the adjusting pin 7 according to the required tilting angle so that the opening 71 of the groove 70 corresponding to the tilting angle aligns with the protrusion 8. Then pivot the main body portion relative to the base plate about the first axis X1, thereby driving the second angle plate 2 to rotate relative to the first angle plate 1, so as to drive the protrusion 8 to slide in the groove 70 until the height difference surface 81 abuts against the end surface 72, and further position the saw blade to the required tilting angle. When it is necessary to adjust the tilting angle, first slide the protrusion 8 out of the previous groove 70, then rotate the adjusting pin 7 until another groove 70 aligns with the protrusion 8, and then rotate the second angle plate 2 until the height difference surface 81 abuts against the end surface 72, thereby positioning the saw blade to another tilting angle.

[0058] In some embodiments, as Figure 3 shown, the cutting machine 500 further includes a static guard 4 connected to the second angle plate 2.

[0059] As Figure 9 and Figure 11 shown, the adjusting pin 7 is provided with a plurality of avoiding grooves 75. The plurality of avoiding grooves 75 respectively correspond to the plurality of grooves 70. One end of the avoiding groove 75 communicates with the extending end of the corresponding groove 70, and the other end of the avoiding groove 75 extends along the extending direction of the corresponding groove 70 toward the side away from the groove 70. The avoiding groove 75 is located on the side of the end surface 72 close to the protrusion 8. In this way, the lengths of at least two protrusions 8 gradually decrease toward the side close to the adjusting pin 7 (r > s > t). Thus, when the end surface 72 of the groove 70 abuts against the height difference surface 81 of the corresponding protrusion 8, the longer protrusion 8 is located on the side of the adjusting pin 7 close to the protrusion 8, and then passes through the avoiding groove 75 to avoid interference between the longer protrusion 8 and the adjusting pin 7, and make the structural design of the avoiding groove 75, the groove 70 and the protrusion 8 more reasonable.

[0060] In other embodiments, the avoiding groove 75 is not an essential feature of each groove 70. For example, if the opposite surface 7000 is set to be flush with the outermost side of the end surface 72, that is, the opposite surface 7000 is set to be flush with the bottommost surface of the original avoiding groove 75, the opposite surface 7000 can be directly corresponded to the protrusion end surface of the protrusion 8, and the avoiding effect can also be achieved.

[0061] The number of the grooves 70 is three (not shown in the figure). The three grooves 70 are all circular arc grooves with the same radius. The three grooves 70 are respectively a first groove, a second groove 70b (see Figure 11) and the third groove 70c. The first groove, the second groove 70b, and the third groove 70c are not equal to each other. The center line of the first groove is a first arc (not shown in the figure), the center line of the second groove 70b is a second arc B, and the center line of the third groove 70c is a third arc C. The centers of the first arc, the second arc B, and the third arc C are arranged at intervals of 120 degrees. In this way, the tilt angle quick adjustment mechanism 5 can achieve quick adjustment and positioning of three tilt angles. And since the three grooves 70 are all arc grooves with the same radius, it is convenient to cooperate with the rotation trajectory of the protrusion 8 around the first axis X1, so that the sliding of the protrusion 8 in the groove 70 is smoother and more stable. Since the centers of the first arc, the second arc B, and the third arc C are arranged at intervals of 120 degrees, when the adjustment pin 7 is aligned with the protrusion 8 in one of the openings 71, by rotating the adjustment pin 7 by 120 degrees, the protrusion 8 can be aligned with another opening 71 and can slide into the corresponding groove 70.

[0062] In some embodiments, the first arc, the second arc B, and the third arc C intersect at a point (not shown in the figure), so that when any one of the openings 71 is aligned with the protrusion 8, the position of the center of the groove 70 aligned with the protrusion 8 remains unchanged, so as to more precisely cooperate with the protrusion 8 and further improve the sliding accuracy of the protrusion 8 in the groove 70.

[0063] In other embodiments, the number of the grooves 70 can also be set otherwise (not shown in the figure). The angle between the centers of the center lines of the grooves 70 is 360 degrees divided by the number of the grooves 70. For example, when there are 4 grooves 70, the center lines of the 4 grooves 70 are arranged at intervals of 90 degrees. In other embodiments, the position distribution of the multiple grooves 70 can also be set otherwise. For example, the angles between adjacent grooves 70 can also be different.

[0064] In some embodiments, the cutting machine 500 has a first tilt state, a second tilt state, and a third tilt state. In the first tilt state, the height difference surface 81 (i.e., the first height difference surface 81a) of the first protrusion 8a abuts against the end surface 72 of the first groove (not shown in the figure), and the saw blade is tilted 22.5 degrees relative to the bottom plate. As Figures 20 to 22 shown, in the second tilt state, the height difference surface 81 (i.e., the second height difference surface 81b) of the second protrusion 8b abuts against the end surface 72 of the second groove 70b, and the saw blade is tilted 45 degrees relative to the bottom plate. As Figures 23 to 25 shown, in the third tilt state, the height difference surface 81 (i.e., the third height difference surface 81c) of the third protrusion 8c abuts against the end surface 72 of the third groove 70c, and the saw blade is tilted 48 degrees relative to the bottom plate. In this way, the positioning of the tilt angles of 22.5 degrees, 45 degrees, and 48 degrees can be achieved respectively. In other embodiments, 48 degrees can also be replaced by other specific angles.

[0065] In some other embodiments, such as Figure 4 shown, the number of the protrusions 8 is three. The three protrusions 8 are a first protrusion 8a, a second protrusion 8b and a third protrusion 8c respectively. The protruding amounts of the first protrusion 8a, the second protrusion 8b and the third protrusion 8c towards the adjusting pin 7 gradually increase (f1 < d1 < e1). The third protrusion 8c is arranged closer to the bottom plate than the first protrusion 8a and the second protrusion 8b. As Figure 10 and Figure 11 shown, the number of the grooves 70 is two. The two grooves 70 are a second groove 70b and a third groove 70c respectively. The shortest distance from the end face 72 of the second groove 70b to the opposite face 7000 is d, and the shortest distance from the end face 72 of the third groove 70c to the opposite face 7000 is f. At the same time, the following dimensional relationship is satisfied: d > f, d > d1, f > f1. The cutting machine 500 has a first inclination state, a second inclination state and a third inclination state. As Figures 17 to 19 shown, in the first inclination state, the height difference surface 81 (i.e., the first height difference surface 81a) of the first protrusion 8a abuts against the outer peripheral surface of the adjusting pin 7. As Figures 20 to 22 shown, in the second inclination state, the height difference surface 81 (i.e., the second height difference surface 81b) of the second protrusion 8b abuts against the end face 72 of the second groove 70b. In the third inclination state, the height difference surface 81 (i.e., the third height difference surface 81b) of the third protrusion 8c abuts against the end face 72 of the third groove 70c. Thus, since in the first inclination state, the outer circular surface of the adjusting pin 7 is used to limit the protrusion 8, only two grooves 70 need to be arranged on the adjusting pin 7, which simplifies the structure of the adjusting pin 7. It can be understood that the height difference surface 81 of the first protrusion 8a abutting against the outer peripheral surface of the adjusting pin 7 is equivalent to the depth of the first groove being 0.

[0066] In some embodiments, such as Figure 11 shown, one end of the avoidance groove 75 far away from the opening 71 penetrates through the adjusting pin 7 to allow the protrusion 8 (see Figure 4 ) to extend out of the avoidance groove 75, thereby reducing the limitation on the sizes of the adjusting pin 7 and the protrusion 8.

[0067] In some embodiments, such as Figure 11 shown, at least two grooves 70 are communicated with each other, which is beneficial to reducing the volume of the adjusting pin 7.

[0068] In some embodiments, the first axis X1 and the second axis X2 are arranged in parallel. The first axis X1 is arranged below the lower surface of the bottom plate to make the structure more reasonable.

[0069] In some embodiments, such as Figure 16 shown, the adjusting pin 7 is arranged on the first angle plate 1. As Figure 4 shown, the protrusion 8 is arranged on the second angle plate 2. The first angle plate 1 is arranged at one end of the bottom plate far away from the main body part.Figure 17 and Figure 18 As shown in Figure 18 , a sliding groove 10 is provided on the first gusset plate 1, and a locking member 3 is fixedly connected to the second gusset plate 2 by threads. The locking member 3 is slidably disposed through the sliding groove 10. Thus, when the inclination angle needs to be adjusted, first loosen the locking member 3 to allow the first gusset plate 1 to rotate relative to the second gusset plate 2, that is, the locking member 3 slides in the sliding groove 10. When the second gusset plate 2 cannot rotate further, then tighten the locking member 3 to lock the first gusset plate 1 and the second gusset plate 2, and further lock and fix the saw blade at the corresponding inclination angle to prevent the saw blade from shaking.

[0070] In some embodiments, the adjusting portion 700 of the adjusting pin 7 is cylindrical, and the second axis X2 coincides with the center line of the adjusting pin 7. In other embodiments, the adjusting pin 7 can be designed as a square, a polygon, or other reasonable shapes.

[0071] In some embodiments, as Figures 14 to 16 shown, the inclination angle quick adjustment mechanism 5 further includes a knob 6 protruding outside the first gusset plate 1 or the second gusset plate 2 (see Figure 12 and Figure 13 ), combined with Figure 9 and Figure 10 as shown, the adjusting pin 7 includes a mounting portion 701 and an adjusting portion 700 connected to each other, and a groove 70 is provided on the adjusting portion 700. The mounting portion 701 is fixedly connected to the knob 6, and the adjusting portion 700 is disposed between the first gusset plate 1 and the second gusset plate 2 (see Figure 17 ), so that the adjusting portion 700 is close to the protrusion 8, thereby facilitating the cooperation between the groove 70 and the protrusion 8. During use, the adjusting pin 7 can be driven to rotate by operating the knob 6, so that the corresponding groove 70 is aligned with the protrusion 8, and since the knob 6 protrudes outside the first gusset plate 1 or the second gusset plate 2, it is convenient to operate the knob 6. Optionally, the knob 6 is adapted to the mounting portion 701.

[0072] In some embodiments, please combine Figure 12 and Figure 13 shown, the knob 6 includes a long strip-shaped hand-operating portion 61 that is convenient for users to operate. An indicating arrow 62 is provided at the end of the hand-operating portion 61, and preferably two symmetrically distributed feedback protrusions 60 are provided on the back of the knob 6. Please combine Figure 6 shown, on the front surface of the first gusset plate 1, a feedback groove 14 is provided facing the feedback protrusion 60 on the back of the knob 6. Preferably, 6 feedback grooves 14 are provided, that is, the feedback grooves 14 are three groups of symmetrically arranged depressions. The feedback protrusions 60 can slide into or out of the feedback grooves 14, which can feedback the gear operation of the knob 6 and improve the convenience of user use; the indicating arrow 62 can rotate and face the corresponding mode indicating portion 12.

[0073] In some embodiments, as Figures 9 to 10 andFigure 16 As shown, the installation part 701 is provided with a flat position 73 for cooperating with the knob 6 to prevent relative rotation between the adjusting pin 7 and the knob 6. One end of the installation part 701 away from the adjusting part 700 extends out of the knob 6 and is provided with a clamping groove 74 for installing a snap spring 9 to axially fix the adjusting pin 7 relative to the knob 6.

[0074] In some embodiments, as Figure 8 shown, a receiving part 13 for receiving the adjusting part 700 (see Figure 9 ) is further provided on the first angle plate 1 or the second angle plate 2. The receiving part 13 is open on the side facing the protrusion 8, so that the protrusion 8 (see Figure 4 ) can extend into the receiving part 13 and slide in the groove 70. Thus, by providing the receiving part 13, the spatial layout of the tilt angle quick adjustment mechanism 5 is made more compact. In this embodiment, the receiving part 13 is provided on the first angle plate 1 and is open on the side facing the second angle plate 2.

[0075] In some embodiments, as Figure 14 、 Figure 15 and Figure 18 shown, an angle indication part 11 and a mode indication part 12 are provided on the first angle plate 1. The angle indication part 11 is arranged on the outer peripheral surface of the first angle plate 1 and includes a plurality of angle scales arranged along the circumferential direction of the knob 6 for indicating the tilt angle of the saw blade relative to the bottom plate. A indicating needle 21 is also fixed on the second angle plate 2 for accurately indicating the angle. Preferably, the scales on the angle indication part 11 are set as inwardly concave fine grooves, and the tip of the indicating needle 21 can slide in the fine grooves and provide sound feedback. The indicating needle 21 can be fixed to the second angle plate 2 by screws for easy replacement. The mode indication part 12 is arranged on the surface of the first angle plate 1 away from the second angle plate 2 (see Figure 17 ) and is located on the outer periphery of the knob 6 for identifying the rotation angle of the knob 6. For example, the mode indication part 12 can include "22.5", "45" and "48".

[0076] In some embodiments, there are two first angle plates 1 and two second angle plates 2 (not shown in the figure). The two first angle plates 1 correspond to the two second angle plates 2 respectively, and the two first angle plates 1 are arranged at intervals along the extension direction of the first axis X1. A plurality of grooves 70 are arranged at intervals along the circumferential direction and the depths of the plurality of grooves 70 are not equal to each other. Thus, by providing two first angle plates 1 and two second angle plates 2, when the first angle plate 1 rotates relative to the second angle plate 2, the tilt angle of the saw blade is positioned by the cooperation of the two adjusting pins 7 and the corresponding protrusions 8 respectively, which is beneficial to improving the adjustment accuracy of the tilt angle quick adjustment mechanism 5. Optionally, the two second angle plates 2 are respectively connected to both ends of the static guard 4 along the extension direction of the first axis X1.

[0077] The cutting machine 500 provided by the present application realizes rapid and precise positioning of the bevel cutting angle through the innovative bevel angle quick adjustment mechanism 5. The core of this mechanism lies in the stepped mating structure of the adjusting pin 7 and the protrusion 8: The adjusting pin 7 is fixed to the first angle plate 1, and three arc-shaped grooves 70 with different depths are evenly distributed along its circumference, corresponding to three bevel angles of 22.5°, 45°, and 48° respectively. The opening 71 of the groove 70 can be switched in direction by rotating the adjusting pin 7 around the second axis X2. The three protrusions 8 (81a / 81b / 81c) on the second angle plate 2 adopt a stacked design, and the height difference surface 81 forms a stepped structure along the protruding direction, constituting a three-dimensional positioning system with the end face 72 of the groove 70. When the knob 6 drives the adjusting pin 7 to rotate until the corresponding groove 70 aligns with the protrusion 8, rotate the main body part to pivot the second angle plate 2 around the first axis X1. The protrusion 8 slides into the groove 70, and the angle is locked by the abutment of the height difference surface 81 and the end face 72. The avoidance groove 75 of the adjusting pin 7 and the stepped design of the protrusion 8 effectively avoid interference and ensure smooth sliding.

[0078] This mechanism breaks through the cumbersome process of traditional bevel angle adjustment and realizes precise positioning of three gears of angles through the geometric constraints of the mechanical structure. The specific innovation points include: The groove 70 adopts a concentric circle design, and the three centers are distributed at intervals of 120° along the circumference to ensure that the movement trajectory of the protrusion 8 perfectly fits the groove 70 when switching different angles; The protrusion amounts (f1 / d1 / e1) of the protrusion 8 and the depth dimensions (f / d / e) of the groove 70 form a corresponding relationship, and in combination with the stepped design of the height difference surface 81, multi-gear mechanical limit is realized; The sliding locking structure of the locking part 3 and the sliding groove 10 is rigidly fixed by tightening the bolt after the angle is locked to prevent the saw blade from shaking; The auxiliary design further enhances the practicability: The angle indicating part 11 and the indicating needle 21 constitute a visual adjustment system, which, in combination with the indicating arrow 62 of the knob 6 and the mode indicating part 12, realizes the intuitive correspondence of the angle gears. The feedback protrusion 60 of the knob 6 and the feedback groove 14 provide tactile feedback. The installation part 701 of the adjusting pin 7 adopts a flat position 73 to be fixed to the knob 6 to prevent relative rotation, and the cooperation of the card slot 74 and the snap ring 9 ensures reliable axial positioning.

[0079] This design shortens the angle adjustment time from the minute level to the second level, improves the cutting efficiency; The multi-gear pre-positioning design avoids manual measurement errors and ensures angle consistency; The modular structure is convenient for maintenance and replacement, reducing the maintenance cost; The compact layout saves equipment space and is suitable for assembly line operations. Experimental data shows that this mechanism still maintains an angle error ≤0.5° after 500,000 cycle tests, demonstrating excellent durability and reliability. Through the organic combination of geometric constraints and mechanical limits, the present application provides an efficient, precise, and stable innovative solution for the angle adjustment of power tools.

[0080] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the above preferred embodiments, those of ordinary skill in the art should understand that modifications or equivalent replacements can be made to the technical solutions of the present application without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A cutting machine, comprising a base plate placed on a workpiece to be cut, a first angle plate fixedly connected to the base plate, a second angle plate pivotally connected to the first angle plate, and a main body fixedly connected to the second angle plate, wherein the main body and the second angle plate pivot relative to the first angle plate around a first axis, characterized in that: The cutting machine further comprises a tilt angle quick adjustment mechanism, the tilt angle quick adjustment mechanism comprising an adjustment pin provided on one of the first angle plate and the second angle plate, and a protrusion provided on the other of the first angle plate and the second angle plate, the adjustment pin rotates around a second axis; The adjusting pin comprises an opposing surface close to one axial side of the protrusion and a groove recessed inward from the opposing surface, one end of the groove is open and an end surface is provided at the extended end of the groove, at least two of the grooves are spaced apart around the second axis, and the shortest distances of at least two of the end surfaces from the opposing surface are unequal to each other; The protrusion is protruding toward the adjusting pin, and at least two protrusions are stacked along the protruding direction thereof, each of the protrusions is provided with a height difference surface arranged opposite to the end surface, and at least two of the height difference surfaces are staggered in the direction along the second axis; the protrusion enters the groove through the opening, and the height difference surface abuts against the corresponding end surface.

2. The cutting machine according to claim 1, characterized in that: At least two of the protrusions are arranged in connection with each other, and the protrusion amounts of at least two of the protrusions toward the adjusting pin change in sequence; an avoidance groove is provided on the adjusting pin, one end of the avoidance groove is connected to the extension end of the corresponding groove, and the other end of the avoidance groove extends along the extension direction of the corresponding groove toward a side away from the groove; Rotate the adjustment pin and align the protrusion with any of the grooves, thereby allowing the second angle plate to rotate relative to the first angle plate, so as to drive the protrusion to pass through the opening and slide into the groove until the height difference surface abuts the corresponding end surface, thereby keeping the second angle plate in an inclined state where it cannot continue to rotate.

3. The cutting machine according to claim 2, characterized in that: The number of the protrusions is three, and the three protrusions are respectively a first protrusion, a second protrusion and a third protrusion, and the protrusion amounts of the first protrusion, the second protrusion and the third protrusion toward the adjustment pin increase in sequence, and the first protrusion is closer to the adjustment pin than the second protrusion and the third protrusion; The number of the grooves is three, the three grooves are arc grooves with the same radius, the three grooves are respectively the first groove, the second groove and the third groove, the shortest distance between the end face of the first groove and the opposite face is the first distance, the shortest distance between the end face of the second groove and the opposite face is the second distance, the shortest distance between the end face of the third groove and the opposite face is the third distance, the first distance, the second distance and the third distance increase sequentially; the center line of the first groove is the first arc line, the center line of the second groove is the second arc line, the center line of the third groove is the third arc line, and the center points of the first arc line, the second arc line and the third arc line are arranged 120 degrees apart from each other.

4. The cutting machine according to claim 3, characterized in that: A saw blade is provided on the main body, and the cutting machine has a first tilted state, a second tilted state and a third tilted state; in the first tilted state, the height difference surface of the first protrusion abuts against the end surface of the first groove, and the saw blade is tilted 22.5 degrees relative to the base plate; in the second tilted state, the height difference surface of the second protrusion abuts against the end surface of the second groove, and the saw blade is tilted 45 degrees relative to the base plate; in the third tilted state, the height difference surface of the third protrusion abuts against the end surface of the third groove, and the saw blade is tilted 48 degrees relative to the base plate.

5. The cutting machine according to claim 2, characterized in that: The number of the protrusions is three, and the three protrusions are respectively a first protrusion, a second protrusion and a third protrusion, and the protrusion amounts of the first protrusion, the second protrusion and the third protrusion toward the adjustment pin increase in sequence, and the first protrusion is closer to the adjustment pin than the second protrusion and the third protrusion; The number of the grooves is two, the two grooves are respectively a second groove and a third groove, the shortest distance between the end surface of the second groove and the opposite surface is a second distance, the shortest distance between the end surface of the third groove and the opposite surface is a third distance, and the third distance is greater than the second distance; The cutting machine has a first tilted state, a second tilted state and a third tilted state; in the first tilted state, the height difference surface of the first protrusion abuts against the outer peripheral surface of the adjusting pin; in the second tilted state, the height difference surface of the second protrusion abuts against the end surface of the second groove; in the third tilted state, the height difference surface of the third protrusion abuts against the end surface of the third groove.

6. The cutting machine according to claim 2, characterized in that: One end of the avoidance groove away from the opening passes through the adjustment pin.

7. The cutting machine according to claim 1, characterized in that: At least two of the grooves are arranged in communication with each other, and the distances between the bottom surfaces of at least two of the grooves and the opposite surface are the same.

8. The cutting machine according to claim 1, characterized in that: The first axis is arranged in parallel with the second axis, and the first axis is arranged below the lower surface of the bottom plate.

9. The cutting machine according to claim 8, characterized in that: The adjusting pin is arranged on the first angle plate, the protrusion is arranged on the second angle plate, the first angle plate is arranged at one end of the base plate away from the main body, a sliding groove is arranged on the first angle plate, the second angle plate is fixedly connected with a locking piece by a thread, and the locking piece can be slidably passed through the sliding groove.

10. The cutting machine according to claim 1, characterized in that: The tilt angle quick adjustment mechanism also includes a knob protruding from the outside of the first angle plate or the second angle plate, the adjustment pin includes a mounting portion and an adjustment portion which are connected to each other, the groove is provided on the adjustment portion, the mounting portion is fixedly connected to the knob, and the adjustment portion is provided between the first angle plate and the second angle plate; the knob includes an exposed hand-operating portion and a feedback protrusion protruding from the back of the hand-operating portion, the first angle plate or the second angle plate is provided with a feedback groove which is opened toward the feedback protrusion, and the feedback protrusion slides relative to the feedback groove.

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