Machine head limiting structure of pull rod saw

Abstract

The pull rod saw comprises a machine head, a pull rod support and a pull rod, the pull rod is connected with the pull rod support in a sliding mode, a connecting base is arranged at the tail of the machine head, the pull rod penetrates through the pull rod support and then is connected to the connecting base, and the connecting base is movably connected with a limiting piece. The limiting piece can move between a first position and a second position relative to the connecting base. The limiting piece has two positions relative to the connecting base, when the limiting piece is located at the first position, the pull rod can guide the machine head to move relative to the pull rod support till the connecting base abuts against the pull rod support, and at the moment, the horizontal distance between the center of a saw blade of the machine head and the front end of the pull rod support is L1; when the limiting piece is located at the second position, the pull rod can guide the machine head to move relative to the pull rod support till the limiting piece abuts against the pull rod support, at the moment, the horizontal distance between the center of the saw blade of the machine head and the front end of the pull rod support is L2, L2 is larger than L1, and the stroke of the machine head moving towards the pull rod support can be limited through the limiting piece.

Description

TECHNICAL FIELD

[0001] The utility model relates to the related technical field of electric saw, especially a machine head limiting structure of pull rod saw. BACKGROUND

[0002] As a kind of cutting tool, miter saw has very wide application range, can be used to cut many metal or non-metal materials, cutting is fast and convenient, miter saw is usually divided into pull rod type and sliding sleeve type according to structure.

[0003] Miter saw generally includes base and workbench on base, workbench is provided with pull rod support and machine head, machine head is movably connected with pull rod support, and machine head includes saw blade for cutting workpiece. When using, just put the workpiece to be cut on workbench, then press machine head downward, saw blade is cut down with workpiece to be cut, so that the purpose of cutting workpiece to be cut can be realized. The specific structure and working principle of miter saw can be seen from the miter saw disclosed in Chinese utility model patent (publication number: CN201579487U), or the miter saw with extension table disclosed in Chinese invention patent (publication number: CN103286378A).

[0004] In actual use, in some special scenarios, the shortest distance between the center of saw blade of machine head and pull rod support needs to be limited to meet cutting demand. There are also technical solutions capable of achieving the function in prior art, but the limiting structure is usually designed to be relatively complex.

[0005] Therefore, it is necessary to improve prior art. UTILITY MODEL CONTENTS

[0006] The utility model discloses a machine head limiting structure of pull rod saw, which solves the problem that in prior art, the shortest distance between the center of saw blade of machine head and pull rod support needs to be limited to meet cutting demand in some special scenarios, and the limiting structure is usually designed to be relatively complex.

[0007] To achieve the above object, the utility model adopts the following technical scheme:

[0008] A machine head limiting structure of a draw bar saw, the draw bar saw comprising a machine head, a draw bar support and a draw bar, the draw bar being in sliding connection with the draw bar support, the tail of the machine head being provided with a connecting seat, the draw bar being connected to the connecting seat after passing through the draw bar support, the connecting seat being movably connected with a limiting sheet, the limiting sheet being movable relative to the connecting seat between a first position and a second position, when the limiting sheet is in the first position, the draw bar can guide the machine head to move relative to the draw bar support until the connecting seat abuts against the draw bar support, when the limiting sheet is in the second position, the draw bar can guide the machine head to move relative to the draw bar support until the limiting sheet abuts against the draw bar support.

[0009] Further, the limiting sheet has a limiting end and a connecting end, the connecting end being in rotational connection with the connecting seat, the connecting seat being provided with a first limiting block and a second limiting block for limiting the rotational angle of the limiting sheet, when the limiting sheet is in the first position, the limiting sheet abuts against the first limiting block, when the limiting sheet is in the second position, the limiting sheet abuts against the second limiting block.

[0010] Further, the connecting seat is provided with a locking mechanism, the locking mechanism being used for locking the limiting sheet in the first position.

[0011] Further, the connecting seat is provided with a mounting hole for mounting the locking mechanism, the locking mechanism comprising a mounting sleeve fixedly connected with the mounting hole, a locking ball being movably mounted in the mounting sleeve, a return spring being arranged between the locking ball and the mounting sleeve, the return spring making the locking ball always have a movement tendency of protruding out of the mounting sleeve.

[0012] Further, the limiting sheet is provided with a locking hole matched with the locking ball, when the limiting sheet is in the first position, the locking ball is in locking cooperation with the locking hole.

[0013] Further, the limiting end of the limiting sheet is provided with a first bending part, when the limiting sheet is in the second position, the first bending part abuts against the draw bar support.

[0014] Further, the limiting sheet is provided with a second bending part bent outwardly.

[0015] Further, the draw bar support is provided with a through hole for the draw bar to pass through, the connecting seat is provided with a connecting hole fixedly connected with the end of the draw bar.

[0016] Further, the limiting sheet is in rotational connection with the connecting seat through a bolt, the connecting end of the limiting sheet is provided with an avoiding hole for the bolt to pass through, the connecting seat is provided with a threaded hole in screw connection with the bolt.

[0017] Further, the pull rod support is provided with a locking wrench, which is used for limiting the pull rod from sliding relative to the pull rod support.

[0018] With the above structure, the utility model has the advantages that the machine head limiting structure of the pull rod saw, the pull rod saw includes a machine head, a pull rod support and a pull rod, the pull rod is slidably connected with the pull rod support, the tail of the machine head is provided with a connecting seat, the pull rod is connected to the connecting seat after passing through the pull rod support, the connecting seat movably connects a limiting piece, and the limiting piece can move between a first position and a second position relative to the connecting seat. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the utility model, the drawings needed in the following specific embodiment description will be briefly introduced, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0020] Figure 1 It is the overall structure schematic of the utility model Figure 1 (limiting piece is located at the first position);

[0021] Figure 2 It is the overall structure schematic of the utility model Figure 1 the structure enlarged schematic of A of the utility model;

[0022] Figure 3 It is the overall structure schematic of the utility model Figure 2 (limiting piece is located at the second position);

[0023] Figure 4 It is the overall structure schematic of the utility model Figure 3 the structure enlarged schematic of B of the utility model;

[0024] Figure 5 It is the overall structure schematic of the utility model

[0025] Figure 6It is the explosion schematic view of the limiting sheet and the connecting seat of the utility model;

[0026] Figure 7 It is the three-dimensional schematic view of the limiting sheet of the utility model;

[0027] Figure 8 It is the three-dimensional schematic view of the connecting seat of the utility model;

[0028] Figure 9 It is the three-dimensional schematic view of the pull rod support of the utility model;

[0029] Figure 10 It is the three-dimensional schematic view of the locking mechanism of the utility model.

[0030] Figures 1 to 10 The middle mark is:

[0031] 1, head; 11, connecting seat; 111, first limiting block; 112, second limiting block; 113, mounting hole; 114, connecting hole; 115, threaded hole; 2, pull rod support; 21, through hole; 22, locking wrench; 3, pull rod; 31, tail plate; 4, limiting sheet; 41, limiting end; 411, first bending part; 42, connecting end; 421, avoiding hole; 43, locking hole; 44, second bending part; 5, locking mechanism; 51, mounting sleeve; 52, locking ball; 6, bolt. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purpose, features and advantages of the utility model more apparent, obvious and easy to understand, the specific embodiments of the utility model are described in detail below. In the following description, a lot of specific details are set forth in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0033] In the description of the utility model, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0034] In addition, if these terms "first", "second" appear, these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the utility model, if the term "a plurality of" appears, the meaning of the term "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0035] In the utility model, unless otherwise specifically defined and limited, if the terms "mounting", "connection", "connection", "fixing" and the like appear, these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0036] In the utility model, unless otherwise specifically defined and limited, if there is a similar description of the first feature "on" or "under" the second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly contacted through an intermediate medium. Moreover, the first feature "on", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0037] It should be noted that if an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If there is, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the utility model are only for illustrative purposes and do not indicate the only implementation.

[0038] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict. The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0039] As Figures 1 to 10As shown, a kind of head limiting structure of draw bar saw, the draw bar saw includes head 1, draw bar support 2 and draw bar 3, the draw bar 3 is slidably connected with draw bar support 2, the tail of the head 1 is provided with connecting seat 11, the draw bar 3 is connected to connecting seat 11 after passing through draw bar support 2, connecting seat 11 is movably connected with limiting piece 4, the limiting piece 4 can be moved between first position and second position relative to connecting seat 11, when the limiting piece 4 is located in first position, the draw bar 3 can guide the head 1 relative to the draw bar support 2 moves, until the connecting seat 11 and the draw bar support 2 are in abutment;When the limiting piece 4 is located in second position, the draw bar 3 can guide the head 1 relative to the draw bar support 2 moves, until the limiting piece 4 and the draw bar support 2 are in abutment.

[0040] Based on the above embodiment, the utility model wants to solve is provided with a kind of head limiting structure of draw bar saw, the draw bar saw includes head 1, draw bar support 2 and draw bar 3, the draw bar 3 is slidably connected with draw bar support 2, the tail of the head 1 is provided with connecting seat 11, the draw bar 3 is connected to connecting seat 11 after passing through draw bar support 2, connecting seat 11 is movably connected with limiting piece 4, the limiting piece 4 can be moved between first position and second position relative to connecting seat 11, the head 1 is located in the front end of draw bar support 2.The limiting piece 4 of the utility model relative to connecting seat 11 has two positions, specifically can refer to Figure 1 And Figure 2 As shown, when the limiting piece 4 is located in first position, the draw bar 3 can guide the head 1 relative to the draw bar support 2 moves, until the connecting seat 11 and the draw bar support 2 are in abutment, the horizontal distance between the center of saw blade of head 1 and the front end of draw bar support 2 is L1 at this time;See Figure 3 And Figure 4 As shown, when the limiting piece 4 is located in second position, the draw bar 3 can guide the head 1 relative to the draw bar support 2 moves, until the limiting piece 4 and the draw bar support 2 are in abutment, the horizontal distance between the center of saw blade of head 1 and the front end of draw bar support 2 is L2 at this time, by Figure 1 And Figure 3 As shown, it can be clearly known that L2 is greater than L1, i.e. through limiting piece 4, the stroke of head 1 towards draw bar support 2 can be limited, to meet the cutting demand under some special scenarios.

[0041] As another preferred embodiment of this utility model, the limiting piece 4 has a limiting end 41 and a connecting end 42. The connecting end 42 is rotatably connected to the connecting seat 11. The connecting seat 11 is provided with a first limiting block 111 and a second limiting block 112 for limiting the rotation angle of the limiting piece 4. When the limiting piece 4 is in the first position, the limiting piece 4 abuts against the first limiting block 111. When the limiting piece 4 is in the second position, the limiting piece 4 abuts against the second limiting block 112. In this embodiment, as... Figure 2 and Figure 4 As shown, the limiting piece 4 can be limited by the first limiting block 111 and the second limiting block 112 respectively, so as to quickly adjust the limiting piece 4 to the correct position.

[0042] As another preferred embodiment of this utility model, the connecting seat 11 is provided with a locking mechanism 5, which is used to lock the limiting piece 4 in the first position. The connecting seat 11 is provided with a mounting hole 113 for installing the locking mechanism 5. The locking mechanism 5 includes a mounting sleeve 51 fixedly connected to the mounting hole 113. A locking ball 52 is movably installed inside the mounting sleeve 51. A return spring (not shown in the figure) is abutted between the locking ball 52 and the mounting sleeve 51. The return spring ensures that the locking ball 52 always has a tendency to protrude from the mounting sleeve 51. The limiting piece 4 is provided with a locking hole 43 that cooperates with the locking ball 52. When the limiting piece 4 is in the first position, the locking ball 52 is locked in place with the locking hole 43. In this embodiment, as... Figure 2 , Figure 6 and Figure 10 As shown, when the limiting piece 4 moves to the first position, the locking ball 52 protrudes from the mounting sleeve 51 under the elastic force of the return spring and locks with the locking hole 43 of the limiting piece 4, thus locking the limiting piece 4 in the first position. When it is necessary to move the limiting piece 4 to the second position, the limiting piece 4 is moved, causing the locking ball 52 to retract under the force of the limiting piece 4, overcoming the elastic force of the return spring, thereby releasing the locking engagement with the locking hole 43 of the limiting piece 4. That is, the locking mechanism 5 releases the locking of the limiting piece 4, and the limiting piece 4 can move to the second position.

[0043] As another preferred embodiment of this utility model, the limiting end 41 of the limiting piece 4 is provided with a first bending portion 411. When the limiting piece 4 is in the second position, the first bending portion 411 abuts against the pull rod bracket 2. In this embodiment, as... Figure 4 and Figure 7 As shown, the first bending part 411 increases the contact area between the limiting end 41 of the limiting piece 4 and the pull rod bracket 2, making the limiting piece 4 and the pull rod bracket 2 more stably abut against each other.

[0044] As another preferred scheme of the utility model, the limiting sheet 4 is provided with a second bending part 44 bent to the outside. In the embodiment, as shown in the figure, the second bending part 44 bent to the outside acts as a handle, facilitating the application of force to the limiting sheet 4, making it more labor-saving to rotate the limiting sheet 4. Figure 7 As another preferred scheme of the utility model, the limiting sheet 4 is provided with a second bending part 44 bent to the outside. In the embodiment, as shown in the figure, the second bending part 44 bent to the outside acts as a handle, facilitating the application of force to the limiting sheet 4, making it more labor-saving to rotate the limiting sheet 4.

[0045] As another preferred scheme of the utility model, the pull rod support 2 is provided with a through hole 21 for the pull rod 3 to pass through, and the connecting seat 11 is provided with a connecting hole 114 fixedly connected with the end of the pull rod 3. In the embodiment, as shown in the figures, Figure 5 , Figure 8 and Figure 9 , when installing, the first end of the pull rod 3 is fixedly connected with the connecting hole 114 of the connecting seat 11 after passing through the through hole 21 of the pull rod support 2, the pull rod 3 can linearly slide in the front and back directions in the through hole 21, thereby driving the connecting seat 11 to approach or move away from the pull rod support 2. In a further embodiment, the second end of the pull rod 3 is provided with a tail plate 31 to prevent the pull rod 3 from disengaging from the through hole 21.

[0046] As another preferred scheme of the utility model, the limiting sheet 4 is rotatably connected with the connecting seat 11 through a bolt 6, and the connecting end 42 of the limiting sheet 4 is provided with an avoiding hole 421 for the bolt 6 to pass through, and the connecting seat 11 is provided with a threaded hole 115 screwed with the bolt 6. In the embodiment, as shown in the figures, Figure 6 , Figure 7 and Figure 8 , the connecting structure of the limiting sheet 4 and the connecting seat 11 is simple through the connecting mode of the bolt 6, and the limiting sheet 4 can rotate relative to the connecting seat 11, facilitating the rotation of the limiting sheet 4 between the first position and the second position.

[0047] As another preferred scheme of the utility model, the pull rod support 2 is provided with a locking wrench 22 for limiting the pull rod 3 from sliding relative to the pull rod support 2. In the embodiment, as shown in the figures, Figure 2 and Figure 4 , when the distance between the connecting seat 11 and the pull rod support 2 is adjusted to the appropriate position, i.e., the head 1 is adjusted to the appropriate position, the locking wrench 22 is pulled to the locking position, so that the pull rod 3 cannot slide relative to the pull rod support 2, so that the head 1 can be cut at a fixed height and width, ensuring the accuracy and safety of cutting.

[0048] Obviously, the above embodiments are merely exemplary and not limiting. Based on the above description, those skilled in the art can make other different forms of changes or modifications. Here, it is not necessary and impossible to enumerate all the embodiments. The obvious changes or modifications derived therefrom are still within the protection scope of the present application.

Claims

1. A machine head limiting structure of a draw bar saw, the draw bar saw comprising a machine head (1), a draw bar support (2) and a draw bar (3), the draw bar (3) being in sliding connection with the draw bar support (2), a connecting seat (11) being arranged at the tail of the machine head (1), the draw bar (3) being connected to the connecting seat (11) after passing through the draw bar support (2), characterized in that: The connecting seat (11) movably connects a limiting sheet (4), the limiting sheet (4) can move between a first position and a second position relative to the connecting seat (11), when the limiting sheet (4) is located at the first position, the pull rod (3) can guide the movement of the machine head (1) relative to the pull rod support (2) until the connecting seat (11) abuts against the pull rod support (2); when the limiting sheet (4) is located at the second position, the pull rod (3) can guide the movement of the machine head (1) relative to the pull rod support (2) until the limiting sheet (4) abuts against the pull rod support (2). ​ 2. The head limiting structure of a pull-saw according to claim 1, characterized in that: The limiting sheet (4) has a limiting end (41) and a connecting end (42), the connecting end (42) is rotatably connected with the connecting seat (11), the connecting seat (11) is provided with a first limiting block (111) and a second limiting block (112) for limiting the rotation angle of the limiting sheet (4), when the limiting sheet (4) is located at the first position, the limiting sheet (4) abuts against the first limiting block (111), when the limiting sheet (4) is located at the second position, the limiting sheet (4) abuts against the second limiting block (112).

3. The head limiting structure of the pull-saw according to claim 1, wherein: The connecting seat (11) is provided with a locking mechanism (5) for locking the limiting sheet (4) at the first position.

4. The head limiting structure of the pull-saw according to claim 3, wherein: The connecting seat (11) is provided with a mounting hole (113) for mounting the locking mechanism (5), the locking mechanism (5) comprises a mounting sleeve (51) fixedly connected with the mounting hole (113), a locking ball (52) movably mounted in the mounting sleeve (51), a reset spring arranged between the locking ball (52) and the mounting sleeve (51), the reset spring makes the locking ball (52) always have a movement trend of protruding from the mounting sleeve (51).

5. The head limiting structure of the pull-saw according to claim 4, wherein: The limiting sheet (4) is provided with a locking hole (43) matched with the locking ball (52), when the limiting sheet (4) is located at the first position, the locking ball (52) is locked with the locking hole (43).

6. The head limiting structure of the pull-saw according to claim 2, wherein: The limiting end (41) of the limiting sheet (4) is provided with a first bending part (411), when the limiting sheet (4) is located at the second position, the first bending part (411) abuts against the pull rod support (2).

7. The head stop structure of a pull-saw according to claim 1 or 6, characterized in that: The limiting sheet (4) is provided with a second bending part (44) bent outward.

8. The head stop structure of a pull saw according to claim 1, wherein: The pull rod support (2) is provided with a through hole (21) for the pull rod (3) to pass through, the connecting seat (11) is provided with a connecting hole (114) fixedly connected with the end of the pull rod (3).

9. The head stop structure of a pull-saw according to claim 2, characterized in that: The limiting sheet (4) is rotatably connected with the connecting seat (11) through a bolt (6), the connecting end (42) of the limiting sheet (4) is provided with an avoiding hole (421) for the bolt (6) to pass through, the connecting seat (11) is provided with a threaded hole (115) screwed with the bolt (6).

10. The head stop structure of a pull saw according to claim 1, wherein: The pull rod support (2) is provided with a locking wrench (22) for limiting the sliding of the pull rod (3) relative to the pull rod support (2).

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