Bench cutting tools

Abstract

The present invention discloses a bench-type cutting tool, which belongs to the technical field of cutting tools, and includes: a base; a pedestal, connected to the base; a table plate, arranged on the base and provided with a slit extending along a first straight line; a motor, installed in the base; a saw blade, connected to the motor and capable of rotating around a first axis, the saw blade basically extending in a cutting plane, and the saw blade can pass through the slit; the bench-type cutting tool also includes: a gap protection mechanism, including a first guide groove extending in the direction of the first straight line, the first guide groove being basically symmetrically arranged about a first symmetry plane; the gap protection mechanism also includes a first rotating member arranged inside the first guide groove and cooperating with the first guide groove; the distance between the symmetry plane and the cutting plane in the direction along the first axis is greater than or equal to 15 mm and less than or equal to 70 mm. The invention provides a bench-type cutting tool that is convenient for the movement of the table plate and has high cutting accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of cutting tools, and in particular to a table-type cutting tool. Background Art

[0002] Table-type cutting tools are widely used to cut ceramic tiles and other stone materials. Existing cutting tools usually include a base, a motor located in the base, a saw blade driven by the motor, and a movable table supported by the base, with the saw blade part located above the movable table. During operation, the ceramic tile to be cut is placed on the movable table, and the operator pushes the movable table close to the saw blade, so that the saw blade cuts the tile to be cut.

[0003] However, the current movable table is formed by two support plates arranged side by side and spaced apart. The two support plates may open during operation, that is, the support plates may move closer to or farther from the cutting seam, thereby affecting the cutting accuracy. Summary of the invention

[0004] In order to solve the deficiencies of the prior art, an object of the present invention is to provide a table-type cutting tool which is convenient for table movement and has high cutting accuracy.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A bench-type cutting tool, comprising:

[0007] Base;

[0008] A base, connected to the base;

[0009] A table plate, disposed on the base and provided with a slit extending along a first straight line;

[0010] A motor, installed in the base;

[0011] a saw blade connected to the motor and rotatable about a first axis, the saw blade extending substantially in a cutting plane, the saw blade being capable of passing through the kerf;

[0012] The bench-type cutting tool also includes:

[0013] The gap protection mechanism comprises a first guide groove extending along the first straight line direction, and the first guide groove is basically symmetrically arranged about the first symmetry plane; the gap protection mechanism also comprises a first rotating member arranged inside the first guide groove and cooperating with the first guide groove; the distance L1 between the first symmetry plane and the cutting plane along the first axis direction is greater than or equal to 15 mm and less than or equal to 70 mm.

[0014] Furthermore, a distance L1 between the first symmetry plane and the cutting plane along the first axis direction is greater than or equal to 25 mm and less than or equal to 45 mm.

[0015] Further, the first guide groove is mounted to the table, the first rotating member is connected to the base, and the first rotating member can rotate around the second straight line in a second straight line direction perpendicular to the first straight line direction.

[0016] Furthermore, the table-type cutting tool further comprises a buffer mechanism, the buffer mechanism comprising a first buffer chute extending along the first straight line direction, and a first buffer component cooperating with the first buffer chute; the first buffer component comprises:

[0017] A first movable member cooperates with the first buffer chute, and the first movable member can rotate in a direction parallel to the first axis;

[0018] a first supporting member, wherein the first movable member is sleeved on the first supporting member;

[0019] a first buffer member in contact with the first support member;

[0020] When the first buffer chute is matched with the first buffer assembly, the first buffer member can exert a force on the first movable member to make the first movable member match with the first buffer chute and maintain contact therewith.

[0021] Further, the first buffer assembly is mounted on the base, the first support member is arranged in a direction parallel to the first axis, and a stop surface corresponding to and in contact with the first buffer member is formed on the first support member;

[0022] The first buffer assembly includes at least two first buffer members, one end of the first buffer member contacts the stop surface, and the other end contacts the base.

[0023] Furthermore, the first buffer chute is fixedly connected to or integrally formed with the table top.

[0024] Furthermore, the gap protection structure further comprises: a first guide assembly matched with the first guide groove, the first guide assembly comprising a first support column supporting the first rotating member;

[0025] The gap protection structure further includes: a second guide groove extending along the first straight line direction and a second guide assembly matched with the second guide groove, wherein the second guide assembly includes a second rotating member matched with the second guide groove;

[0026] The first guide groove and the second guide groove are respectively arranged on both sides of the cutting plane, and the second guide groove is substantially symmetrically arranged about the second symmetry plane;

[0027] The distance D1 from the first symmetric plane to the second symmetric plane along the first axis is greater than or equal to 45 mm and less than or equal to 140 mm.

[0028] Further, the first guide assembly and the second guide assembly are both mounted on the base;

[0029] An absolute value of a difference between an outer diameter of the first rotating member and a width of the first guide groove along the first axis direction is greater than or equal to 0.3 mm and less than or equal to 3 mm.

[0030] Further, when the first guide assembly is located in the first guide groove, there is at least one contact surface between the first rotating member and the first guide groove.

[0031] Further, the first guide groove comprises:

[0032] A first guide edge, used to prevent the table from moving to the right;

[0033] a second guide edge, disposed opposite to the first guide edge, and used to prevent the table from moving leftward;

[0034] a connecting edge, connecting the first guide edge and the second guide edge;

[0035] Wherein, in the direction along the first axis, a distance L2 from the second guide edge to the cutting plane is greater than or equal to 5 mm and less than or equal to 60 mm.

[0036] The benefit of the present invention lies in that: the first guide groove cooperates with the first rotating member so that the table plate will not deviate during the movement, thereby improving the cutting accuracy of the table-type cutting tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic structural diagram of a table-shaped cutting tool provided by an embodiment of the present invention;

[0038] Figure 2 yes Figure 1 An exploded structural diagram of a table-type cutting tool at one angle;

[0039] Figure 3 yes Figure 2 A schematic diagram of the exploded structure of the table-type cutting tool shown in another angle;

[0040] Figure 4 yes Figure 1 A side view of the bench-type cutting tool shown;

[0041] Figure 5 yes Figure 4 AA cross-sectional view;

[0042] Figure 6 yes Figure 5 The enlarged view of point B in FIG.

[0043] Figure 7 yes Figure 1 Schematic diagram of partial structural breakdown of the base of the bench-type cutting tool shown Figure 1 ;

[0044] Figure 8 yes Figure 1 A schematic diagram of a layout of the first rotating member in the table-type cutting tool shown;

[0045] Fig. 9 yes Figure 1 Another schematic diagram of the layout of the first rotating member in the table-type cutting tool shown;

[0046] Fig.10 yes Figure 1 A schematic diagram of another layout of the first rotating member in the table-type cutting tool shown;

[0047] Fig.11 yes Figure 1 Schematic diagram of partial structural breakdown of the base of the bench-type cutting tool shown Figure 2 ;

[0048] Fig.12 yes Fig.11 Enlarged view of point C in FIG. DETAILED DESCRIPTION

[0049] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] For the convenience of explanation, this embodiment is described in detail. Figure 1 Taking the table-type cutting tool as an example, the directions are defined as up, down, front, back, left and right.

[0051] like Figure 1As shown, an embodiment of the present invention provides a table-type cutting tool 100, specifically a table saw. It includes: a base 10, a pedestal 20, a table 30, a motor (not shown in the figure), a power supply device 50 and a saw blade 60. Among them, the base 10 is formed with a receiving space. The motor is at least partially arranged in the receiving space of the base 10, and the base 20 is installed on the upper side of the base 10 and is fixedly connected to the base 10. The table 30 is connected to the base 10, and the table 30 is arranged on the base 10. Specifically, the table 30 is movably connected to the base 10 through the base 20, that is, the table 30 can move relative to the base 10 substantially along the first straight line 102. In this embodiment, the table 30 includes a first support plate 310 and a second support plate 320, and a connecting plate 330 connecting the end of the first support plate 310 and the end of the second support plate 320. The first support plate 310 and the second support plate 320 are arranged at intervals, that is, a slit 340 is formed between the first support plate 310 and the second support plate 320 for the saw blade 60 to pass through. The saw blade 60 basically extends in the cutting plane P1. Specifically, the saw blade 60 is connected to the end of the motor, so that when the motor is driven, the saw blade 60 is connected to the motor and can be driven directly or indirectly by the motor to rotate around the first axis 101. The bench-type cutting tool 100 has a cutting plane P1, wherein the cutting plane P1 is the extension plane of the saw blade 60 when the bench-type cutting tool 100 is installed with the saw blade 60, that is, the saw blade 60 extends in the cutting plane P1. The power supply device 50 is used to provide an energy source for the motor. The power supply device 50 can use a DC power supply or an AC power supply. In this embodiment, the bench-type cutting tool 100 uses an AC power supply. During operation, the user can place the workpiece to be cut on the table 30 and fix it to the table 30. The user can push the table 30 or the workpiece to be cut to move the table 30 forward, thereby achieving cutting of the workpiece to be cut.

[0052] Please refer to Figures 1 to 6The table-type cutting tool 100 further includes a gap protection structure 70 for guiding and limiting the movement of the table 30 along the first straight line 102. The gap protection structure 70 includes a first guide groove 71 and a first guide assembly 72 at least partially disposed inside the first guide groove 71 and matched with the first guide groove 71, so as to guide the table 30 to move in the first straight line 102 direction. Specifically, the first guide assembly 72 includes a first rotating member 721, that is, the first rotating member 721 is disposed inside the first guide groove 71 and can match the first guide groove 71, so that the table 30 moves along the first straight line 102 direction. In this embodiment, the first guide groove 71 is arranged on the first support plate 310, and the first guide groove 71 is basically symmetrically arranged about the first symmetry plane P2. At the same time, the first guide groove 71 basically extends along the direction of the first straight line 102 and is arranged adjacent to the cutting seam 340. That is to say, the first guide groove 71 is configured to be arranged adjacent to the saw blade 60, that is, the distance L1 between the first symmetry plane P2 and the cutting plane P1 in the direction along the first axis 101 is greater than or equal to 15 mm and less than or equal to 70 mm. In this way, the first guide groove 71 and the first guide assembly 72 can be in a more reasonable position relative to the saw blade 60. When the table-type cutting tool 100 is cutting, the saw blade 60 can pass through the slit 340. Specifically, the slit 340 of the table 30 is formed by the first support plate 310 and the second support plate 320 being arranged at intervals. In order to enable the first support plate 310 and the second support plate 320 to form synchronous movement, the rear ends of the first support plate 310 and the second support plate 320 are connected by a connecting plate 330 to achieve synchronous movement of the first support plate 310 and the second support plate 320. From this, we can see that the front ends of the first support plate 310 and the second support plate 320 are not directly connected. Therefore, when the user drives the table 30, the first support plate 310 and the second support plate 320 often deviate outward or inward, thereby affecting the cutting accuracy. Through the above arrangement, the first symmetry plane P2 is set within a reasonable range from the cutting plane P1, so that the first support plate 310 will not deviate outward or inward during the movement along the first straight line 102, thereby ensuring the cutting accuracy of the table-type cutting tool 100. Further, when the distance L1 between the first symmetry plane P2 and the cutting plane P1 along the direction of the first axis 101 is greater than or equal to 25 mm and less than or equal to 45 mm, the effect is better.

[0053] The first guide groove 71 is fixedly connected or integrally formed with the first support plate 310. As a feasible implementation, the first guide groove 71 is directly fixed or indirectly fixed with the first support plate 310. Specifically, the first guide groove 71 is directly fixed with the first support plate 310, that is, the first guide groove 71 and the first support plate 310 can be directly connected by screw connection, interference fit or the like. Alternatively, the first guide groove 71 can be installed on an intermediate piece, and the intermediate piece is fixedly connected with the first support plate 310. As another feasible implementation, the first guide groove 71 is formed by the first support plate 310 itself. In this implementation, we do not limit the specific connection method between the first guide groove 71 and the first support plate 310, as long as the first guide groove 71 and the first support plate 310 can be relatively fixed.

[0054] The first guide groove 71 includes: a first guide edge 711, which is used to prevent the first support plate 310 from moving to the right; a second guide edge 712 arranged opposite to the first guide edge 711, which is used to prevent the first support plate 310 from moving to the left; and a connecting edge 713 for connecting the first guide edge 711 and the second guide edge 712. The first guide edge 711 is arranged on the right side of the second guide edge 712, and the distance L2 from the second guide edge 712 to the cutting plane P1 along the first axis 101 is greater than or equal to 5 mm and less than or equal to 60 mm. In this way, the first guide groove 71 is arranged as close as possible to the cutting position of the table-type cutting tool 100, that is, it is arranged adjacent to the saw blade 60, so that the table 30 is prevented from opening during operation, that is, the table 30 is prevented from being offset, thereby ensuring cutting accuracy and improving work efficiency. At the same time, it can guide the operation of the table 30 and improve the user experience.

[0055] Please refer to Figure 2 , Figure 7 , a plurality of first guide assemblies 72 are mounted on the base 20, and the plurality of first guide assemblies 72 extend substantially along the direction of the first straight line 102, and the first guide assemblies 72 include a first rotating member 721 capable of rotating around the second straight line 103 for guiding the first guide slot 71, a first supporting column 722 for supporting the first rotating member 721, and a first locking member 723 for fixing the first supporting column 722. Specifically, the first supporting column 722 penetrates the first locking member 723 and is mounted on the base 20, the first supporting column 722 partially extends out of the base 20, and the first rotating member 721 is arranged at the end of the first supporting column 722, that is, the first rotating member 721 is arranged between the first support plate 310 and the base 20. The absolute value of the outer diameter of the first rotating member 721 and the width of the first guide slot 71 along the first axis 101 is greater than or equal to 0.3 mm and less than or equal to 3 mm.

[0056] When the user drives the table 30, the first guide groove 71 can drive the first rotating member 721 to rotate around the second straight line 103. The first rotating member 721 is used to limit the movement direction of the first guide groove 71. Through the above arrangement, the first rotating member 721 and the first guide groove 71 can be closely matched, so as to better prevent the first support plate 310 from deviating inward or outward, thereby improving the cutting accuracy of the tool, and can also be used to guide the movement of the first guide groove 71. In this embodiment, the direction of the first straight line 102 intersects with the direction of the second straight line 103. Further, the absolute value of the outer diameter A of the first rotating member 721 and the width B of the first guide groove 71 along the first axis 101 is greater than or equal to 0.15 mm and less than or equal to 2 mm, and the effect is better. It should be noted that the outer diameter of the first rotating member 721 mentioned above can also be understood as the maximum distance of the first rotating member 721 in the direction along the first axis 101, that is, it is not limited to the first guide groove 71, the arrangement position of the first rotating member 721 on the base 20, and whether other parts are circumferentially arranged on the first rotating member 721. In other words, the outer diameter of the first rotating member 721 described in this paragraph is not only limited to the first rotating member 721, but can also be several distances along the first axis 101 that can be accommodated by the first guide groove 71, and also includes the distance along the first axis 101 when other parts are circumferentially arranged on the first rotating member 721.

[0057] The base 20 is provided with a plurality of first rotating members 721, at least two of which are provided, and the plurality of first rotating members 721 are distributed substantially along the direction of the first straight line 102. When the first guide assembly 72 is located in the first guide groove 71, the first rotating member 721 and the first guide groove 71 have at least one contact surface. As an embodiment, please refer to Figure 8 , multiple first rotating members 721 are arranged along the first straight line 102, and at this time, the first rotating members 721 have at least two contact surfaces with the first guide groove 71. As another embodiment, please refer to Fig. 9 , a plurality of first rotating members 721 are staggered along the first straight line 102, that is, two first rotating members 721 are spaced apart along the first axis 101. At this time, the first rotating member 721 has only one contact surface with the first guide groove 71. In some other embodiments, please refer to Fig.10 , that is, the plurality of first rotating members 721 are arranged in two rows along the first straight line 102 , and at this time, the first rotating member 721 has only one contact surface that contacts the first guide groove 71 .

[0058] Please refer to Figure 1 , Figure 5 and Figure 7The gap protection structure 70 also includes a second guide groove 73 extending along the first straight line 102 and connected to the second support plate 320, and a second guide assembly 74 cooperating with the second guide groove 73, wherein the first guide assembly 72 and the second guide assembly 74 are respectively arranged on both sides of the cutting plane P1, that is, it can be understood that the first guide groove 71 and the second guide groove 73 are respectively arranged on both sides of the cutting plane P1, and the second guide groove 73 is basically symmetrically arranged about a second symmetry plane P3, and in the direction along the first axis 101, the distance D1 from the first symmetry plane P2 to the second symmetry plane P3 is greater than or equal to 45 mm and less than or equal to 140 mm.

[0059] The table-type cutting tool 100 further includes a guard device 80 for protecting the saw blade 60 and a water tank 120 for cooling the saw blade 60. The base 10 extends downward to form the water tank 120. The saw blade 60 partially extends downward and is located in the water tank 120. The guard device 80 is mounted on the base 20 and is disposed adjacent to the saw blade 60. Through the above arrangement, the cutting accuracy can be ensured while leaving enough space for arranging structures such as the guard device 80. In this embodiment, the fixed end 81 of the guard device 80 is basically disposed on the left side of the cutting plane P1, and the distance D2 from the second symmetry plane P3 to the cutting plane P1 is greater than or equal to 30 mm and less than or equal to 70 mm. Because the saw blade 60 will inevitably bring up the water in the water tank 120 when rotating, in order to protect the rotating member, a waterproof protective cover 724 can be provided on the outer side of the first rotating member 721.

[0060] In this embodiment, the structure of the second guide assembly 74 is basically similar to the specific structure of the first guide assembly 72, that is, the second guide assembly 74 also includes a second rotating member, a second support column, a second limit member, etc. In order to avoid the specification being too lengthy, no further details will be given here.

[0061] In some other embodiments, the first guide assembly 72 and the second guide assembly 74 may also be connected to the table 30 , and the first guide groove 71 and the second guide groove 73 are both disposed on the base 20 .

[0062] Please refer to Figure 1 , Figure 7 , Fig.11 and Fig.12The table-type cutting tool 100 also includes a buffer mechanism 90, which includes a first buffer chute 91 extending in the direction of the first straight line 102, and a first buffer assembly 92 cooperating with the first buffer chute 91. In this embodiment, a plurality of first buffer assemblies 92 are cooperating with the first buffer chute 91 to guide the first buffer chute 91 to move in the direction of the first straight line 102. Preferably, there are two first buffer assemblies 92 cooperating with the first buffer chute 91 on the movement path of the first buffer chute 91. The first buffer chute 91 is fixedly connected to the first support plate 310 or integrally formed. The first buffer chute 91 is mounted on the base 20. Specifically, a groove 21 for accommodating at least part of the first buffer assembly 92 is formed on the base 20. The first buffer assembly 92 includes a first movable member 921, a first support member 922, a first buffer member 923 and an upper cover 924. When the first buffer chute 91 is matched with the first buffer assembly 92, the first buffer member 923 can exert a force on the first movable member 921 to make the first movable member 921 match and maintain contact with the first buffer chute 91. In this way, the first support plate 310 can always maintain contact with the first buffer assembly 92 when it is matched, avoiding the first movable member 921 from causing a height difference between the first buffer assembly 92 due to the existence of parts or assembly during the assembly process, which causes the first support plate 310 to fluctuate up and down during operation, so that the table 30 remains stable during the sliding process.

[0063] The first buffer member 923 is at least partially arranged in the groove 21 and contacts with the first support member 922. A connecting rib 22 protruding upward is formed on the base 20. The first support member 922 is extended along the first axis 101. A first movable member 921 is sleeved in the circumferential direction of the first support member 922. The first movable member 921 can rotate around the first support member 922. The end of the first support member 922 cooperates with the connecting rib 22 to form a preliminary positioning. A limiting rib 23 for clamping with the upper cover 924 is also formed on the base 20.

[0064] In this embodiment, the first buffer member 923 is specifically a spring, and the first buffer assembly 92 is provided with two springs, specifically, one end of the spring abuts against the base 20, and the other end of the spring abuts against the first support column 722, and a stopper surface 925 corresponding to the spring is formed on the first support column 722. The user applies a driving force to drive the table 30, and when the first buffer chute 91 cooperates with the first buffer assembly 92, the first movable member 921 guides the first buffer chute 91 to move, and at the same time, due to the gravity of the first support plate 310 and the driving force applied by the user, the first buffer chute 91 applies a force to the first movable member 921, and the spring is deformed when the first movable member 921 rotates. Due to the characteristics of the spring itself, the spring applies a force to the first support member 922 to keep it in place, thereby keeping the first buffer chute 91 in contact with the first movable member 921, thereby ensuring that the table 30 slides smoothly.

[0065] Likewise, a second buffer chute having the same structure as the first buffer chute 91 and a plurality of second buffer assemblies cooperating with the second buffer chute are disposed on the second support plate 320. In this embodiment, a plurality of groups of buffer chute and buffer assemblies are disposed on both sides of the saw blade 60.

[0066] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.

Claims

1. A bench-type cutting tool, comprising: Base; A base, connected to the base; A table plate, disposed on the base and provided with a slit extending along a first straight line; A motor, installed in the base; a saw blade connected to the motor and rotatable about a first axis, the saw blade extending substantially in a cutting plane, the saw blade being capable of passing through the kerf; Characterized in that the table-type cutting tool also includes: The gap protection structure comprises a first guide groove extending along the first straight line direction, wherein the first guide groove is substantially symmetrically arranged about a first symmetry plane; the gap protection structure further comprises a first rotating member arranged inside the first guide groove and cooperating with the first guide groove; a distance L1 between the first symmetry plane and the cutting plane along the first axis direction is greater than or equal to 15 mm and less than or equal to 70 mm; The table-type cutting tool further comprises a buffer mechanism, wherein the buffer mechanism comprises a first buffer chute extending along the first straight line direction, and a first buffer component cooperating with the first buffer chute; the first buffer component comprises: A first movable member cooperates with the first buffer chute, and the first movable member can rotate in a direction parallel to the first axis; a first supporting member, wherein the first movable member is sleeved on the first supporting member; a first buffer member in contact with the first support member; When the first buffer groove cooperates with the first buffer assembly, the first buffer member can exert a force on the first movable member to make the first movable member cooperate with and maintain contact with the first buffer groove, thereby preventing the platform from shaking up and down during operation.

2. The bench-type cutting tool according to claim 1, characterized in that: A distance L1 between the first symmetry plane and the cutting plane along the first axis is greater than or equal to 25 mm and less than or equal to 45 mm.

3. The bench-type cutting tool according to claim 1, characterized in that: The first guide slot is mounted to the table, the first rotating member is connected to the base, and the first rotating member can rotate around the second straight line in a second straight line direction perpendicular to the first straight line direction.

4. The bench-type cutting tool according to claim 1, characterized in that: The first buffer assembly is mounted on the base, the first support member is arranged in a direction parallel to the first axis, and a stop surface corresponding to and contacting the first buffer member is formed on the first support member; The first buffer assembly includes at least two first buffer members, one end of the first buffer member contacts the stop surface, and the other end contacts the base.

5. The bench-type cutting tool according to claim 4, characterized in that: The first buffer chute is fixedly connected to the table top or is integrally formed with the table top.

6. The bench-type cutting tool according to claim 1, characterized in that: The gap protection structure further includes: a first guide assembly matched with the first guide groove, the first guide assembly including a first support column supporting the first rotating member; The gap protection structure further includes: a second guide groove extending along the first straight line direction and a second guide assembly matched with the second guide groove, wherein the second guide assembly includes a second rotating member matched with the second guide groove; The first guide groove and the second guide groove are respectively arranged on both sides of the cutting plane, and the second guide groove is substantially symmetrically arranged about the second symmetry plane; Wherein, a distance D1 from the first symmetric plane to the second symmetric plane along the first axis direction is greater than or equal to 45 mm and less than or equal to 140 mm.

7. The bench-type cutting tool according to claim 6, characterized in that: The first guide assembly and the second guide assembly are both mounted on the base; An absolute value of a difference between an outer diameter of the first rotating member and a width of the first guide groove along the first axis direction is greater than or equal to 0.3 mm and less than or equal to 3 mm.

8. The bench-type cutting tool according to claim 6, characterized in that: When the first guide assembly is located in the first guide groove, the first rotating member has at least one contact surface with the first guide groove.

9. The bench-type cutting tool according to any one of claims 1 to 8, characterized in that: The first guide groove comprises: A first guide edge, used to prevent the table from moving to the right; a second guide edge, disposed opposite to the first guide edge, and used to prevent the table from moving leftward; a connecting edge, connecting the first guide edge and the second guide edge; Wherein, in the direction along the first axis, a distance L2 from the second guide edge to the cutting plane is greater than or equal to 5 mm and less than or equal to 60 mm.

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