Cutting depth adjusting device and electric circular saw

Abstract

The utility model discloses a cutting depth adjusting device and an electric circular saw. The cutting depth adjusting device comprises a bottom plate, a connecting piece, a guide rail and an adjusting piece. And the bottom plate is pivotally connected with the electric circular saw. The connecting piece is installed on the electric circular saw and provided with a guide part. The guide rail is arranged on the bottom plate, a first guide groove is formed in the guide rail, and a plurality of limiting parts are arranged in the first guide groove in the length direction of the first guide groove. The adjusting part comprises a connecting part and a locking part, the connecting part is connected to the guide part and can move along the guide part, and the locking part can move in the first guide groove and is controllably connected with or disconnected from any one of the limiting parts. The cutting depth adjusting device and the electric circular saw are simple in structure, convenient to operate, high in stability and capable of rapidly and stably adjusting the cutting depth of the electric circular saw.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric saws, and in particular relates to a cutting depth regulating device and an electric circular saw. Background Art

[0002] An electric circular saw is a tool that uses a single-phase series-excited motor as its power and drives the circular saw blade through a transmission mechanism to perform sawing operations. It has the characteristics of safety, reliability and high work efficiency.

[0003] The existing electric circular saw is generally pivotally mounted on a bottom plate via a pin shaft, and the pivoting part at one end of the electric circular saw is rotated to adjust the cutting depth of the saw blade. In order to facilitate the adjustment and stabilization of the cutting depth of the saw blade, the existing electric circular saw is generally equipped with a cutting depth adjustment device, for example, the cutting depth of the saw blade is stabilized by the clamping force between the bolt and the nut, and the nut is loosened to adjust the cutting depth when the cutting depth needs to be adjusted, which is extremely inconvenient. In addition, the cutting depth adjustment device also needs to support the electric circular saw. When the electric circular saw is in use, the operator presses down the electric circular saw with force, and the screw may loosen, causing the cutting depth to deviate. Utility Model Content

[0004] The utility model aims to provide a cutting depth adjustment device and an electric circular saw, which have a simple structure, are easy to operate, and have high stability. The position of the electric circular saw is fixed and adjusted by engaging a locking portion with a limiting portion, thereby achieving adjustment of the cutting depth of the electric circular saw.

[0005] In order to achieve the above-mentioned purpose, a specific embodiment of the utility model provides a cutting depth adjustment device, which is applied to an electric circular saw, and the cutting depth adjustment device includes a base plate, a connecting member, a guide rail and an adjusting member. The connecting member is suitable for being installed on the electric circular saw, and a guide portion is provided on the connecting member. The base plate is pivotally connected to the electric circular saw, and the base plate has an opening for allowing the saw blade of the electric circular saw to pass through. The guide rail is arranged on the base plate, and a first guide groove is arranged on the guide rail, and a plurality of limit portions are arranged in the first guide groove along its length direction. The adjusting member includes a connecting portion and a locking portion, the connecting portion is configured to be connected to the guide portion and can move along the guide portion, and the locking portion is configured to be able to move in the first guide groove and engage or disengage with any one of the limit portions in a controlled manner.

[0006] In one or more embodiments of the utility model, the first guide groove is arranged in an arc shape, and the limiting portion includes a first stop surface for abutting against the locking portion, the first end of the first stop surface is connected to the inner arc surface of the first guide groove, and the second end extends in a direction away from the inner arc surface of the first guide groove, and the height of the second end of the first stop surface is not lower than the height of the first end thereof.

[0007] In one or more embodiments of the present utility model, the limiting portion further includes a second stop surface, the first end of the second stop surface is connected to the second end of the first stop surface, the second end extends toward the direction close to the inner arc surface of the first guide groove, and the height of the second end of the second stop surface is less than the height of the first end thereof. The locking portion is provided with at least one first binding surface and at least one second binding surface at one end close to the limiting portion, the first binding surface is used to abut against the first stop surface, and the second binding surface is used to abut against the second stop surface.

[0008] In one or more embodiments of the present invention, one of the guide portion and the connection portion is configured as a slide groove, and the other is configured as a slide rod or a slide block matched with the slide groove.

[0009] In one or more embodiments of the utility model, a first stop portion is provided on the connecting member, and the adjusting member further includes a second stop portion provided on the connecting member and / or the locking member, and the first stop portion abuts against the second stop portion to limit the connecting member from disengaging from the guide portion.

[0010] In one or more embodiments of the present invention, the second stop portion is disposed at an end of the connecting portion away from the locking portion and located in the guide portion, and the first stop portion is disposed in the guide portion or at an end of the guide portion close to the locking portion.

[0011] In one or more embodiments of the present invention, the cutting depth adjustment device further includes an elastic member, the adjustment member further includes a third stop portion, the third stop portion is arranged on the locking portion, the elastic member is sleeved on the locking portion and one end abuts against the third stop portion.

[0012] In one or more embodiments of the utility model, a penetrating second guide groove is provided on the guide rail, one end of the second guide groove is located on the side of the first guide groove away from the limiting portion, and the other end extends to the outer edge of the guide rail in a direction away from the limiting portion, and one end of the locking portion away from the limiting portion passes through the second guide groove.

[0013] In one or more embodiments of the utility model, a fourth stopper and a fifth stopper are provided in the second guide groove, the third stopper abuts against the fourth stopper on one side away from the elastic member, and the elastic member abuts against the fifth stopper on one side away from the third stopper.

[0014] Another specific embodiment of the utility model also provides an electric circular saw, comprising a gripping part, a cutting part and the above-mentioned cutting depth adjustment device. The cutting part is connected to the gripping part, and the connecting piece is connected to the gripping part or the cutting part.

[0015] Compared with the prior art, the cutting depth adjustment device and the electric circular saw of the utility model have a simple structure, are easy to operate, and have high stability. The position of the electric circular saw is fixed and adjusted by engaging a locking portion with a limiting portion, thereby achieving adjustment of the cutting depth of the electric circular saw. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings described below are only some implementations recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a three-dimensional structural diagram of an electric circular saw in one embodiment of the utility model;

[0018] Figure 2 This is an exploded structural diagram of a cutting depth adjustment device in one embodiment of the utility model;

[0019] Figure 3 This is a partial exploded structural diagram of a cutting depth adjustment device in one embodiment of the utility model;

[0020] Figure 4 This is an exploded structural diagram of a connecting member, an adjusting member and an elastic member in one embodiment of the utility model;

[0021] Figure 5 This is an exploded structural diagram of a connecting member, an adjusting member and an elastic member in another embodiment of the utility model;

[0022] Figure 6 This is a diagram showing the engagement state of the locking portion and the limiting portion in one embodiment of the utility model;

[0023] Figure 7 It is a cross-sectional view of a locking portion and a limiting portion in an engagement state in one embodiment of the utility model;

[0024] Figure 8 for Figure 7 A partial enlarged view of part A.

[0025] Explanation of main figure marks: 1. base plate, 2. connecting member, 21. guide portion, 22. first stop portion, 3. adjusting member, 31. connecting portion, 32. locking portion, 321. first joint surface, 322. second joint surface, 33. second stop portion, 34. third stop portion, 4. guide rail, 41. first guide groove, 42. limiting portion, 421. first stop surface, 422. second stop surface, 43. second guide groove, 44. fourth stop portion, 45. fifth stop portion, 5. elastic member, 6. holding portion, 7. cutting portion. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the implementation of the present invention will be clearly and completely described below in conjunction with the drawings in the implementation of the present invention. Obviously, the described implementation is only a part of the implementation of the present invention, not all of the implementations. Based on the implementation of the present invention, all other implementations obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that the terms "lateral", "longitudinal", "vertical", "horizontal", "top", "bottom", "upper", "lower", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] like Figures 1 to 8 As shown, a cutting depth adjustment device in one embodiment of the utility model is applied to an electric circular saw, and the cutting depth adjustment device includes a base plate 1, a connecting member 2, an adjusting member 3 and a guide rail 4. The base plate 1 is pivotally connected to the electric circular saw, and a through opening is provided on the base plate 1, through which the saw blade of the electric circular saw can pass, that is, the electric circular saw can rotate relative to the base plate 1 so that the height of the saw blade passing through the opening changes. The guide rail 4 is provided on the base plate 1, and a first guide groove 41 is provided on the guide rail 4, and a plurality of limit portions 42 are provided in the first guide groove 41 along its length direction. The connecting member 2 is suitable for being installed on the electric circular saw, and a guide portion 21 is provided on the connecting member 2. The adjusting member 3 includes a connecting portion 31 and a locking portion 32. The connecting portion 31 is configured to be connected to the guide portion 21 and can move along the guide portion 21, that is, the connecting portion 31 maintains a sliding connection with the guide portion 21, and the locking portion 32 is configured to be able to move in the first guide groove 41 and to engage or disengage with any one of the limiting portions 42 in a controlled manner. After the locking portion 32 engages with the limiting portion 42, the position of the locking portion 32 can be fixed to prevent the adjusting member 3 from moving in the first guide groove 41.

[0029] According to the above structural design, when the cutting depth of the electric circular saw needs to be adjusted, since the connection portion 31 and the guide portion 21 are slidably connected, the user can move the adjusting member 3 laterally to disengage the locking portion 32 from the limit portion 42, and the adjusting member 3 is no longer restricted by the limit portion 42, that is, the electric circular saw is unlocked. At this time, the user can move the adjusting member 3 along the length direction of the first guide groove 41 and rotate the electric circular saw at the same time to change the size of the saw blade of the electric circular saw passing through the opening of the bottom plate 1 and adjust the cutting depth of the electric circular saw. When the electric circular saw is rotated to a predetermined angle, the locking portion 32 of the adjusting member 3 is engaged with the corresponding limit portion 42 to fix the position of the adjusting member 3 again, that is, to lock the position of the electric circular saw.

[0030] like Figure 4 and Figure 5 As shown, the connecting portion 31 and the locking portion 32 may be coaxially arranged or arranged at a certain angle. Figure 4 As shown, in this embodiment, the main body of the connecting portion 31 and the main body of the locking portion 32 are configured as a rod-shaped structure, and the angle between the axis of the connecting portion 31 and the axis of the locking portion 32 is 90°. Figure 5 As shown, the main body of the connecting part 31 and the main body of the locking part 32 are configured as a rod-shaped structure and are coaxially arranged, and the adjusting member 3 passes through the connecting member 2 .

[0031] Those skilled in the art can understand that the locking portion 32 and the limiting portion 42 can be engaged with each other by means of snap-fit, abutment or interference fit.

[0032] Considering that the first guide groove 41 is generally arranged in an arc shape in actual application, the electric circular saw has a certain weight, which will apply a vertical thrust to the adjustment member 3. The vertical thrust can be decomposed into a first component along the tangential direction of the first guide groove 41 and a second component along the radial direction of the first guide groove 41.

[0033] Under the action of the vertical thrust, in order to ensure the stability of the engagement between the locking portion 32 and the limiting portion 42, so that the cutting depth does not deviate during the use of the electric circular saw, preferably, in this embodiment, the limiting portion 42 includes a first stop surface 421 for abutting against the locking portion 32, the first end of the first stop surface 421 is connected to the inner arc surface of the first guide groove 41, and the second end extends in a direction away from the inner arc surface of the first guide groove 41, and the height of the second end of the first stop surface 421 is not lower than the height of the first end thereof, with the plane where the bottom plate 1 is located as the reference plane.

[0034] According to the above structural design, the first stop surface 421 can provide a supporting force to the locking portion 32 to offset the above-mentioned first component force, so that the locking portion 32 and the limiting portion 42 maintain a stable engagement state, and the inner arc surface of the first guide groove 41 or other structures arranged on its inner arc surface can provide the locking portion 32 with a supporting force to offset the second component force.

[0035] Furthermore, in order to improve the adjustment accuracy of the cutting depth of the electric circular saw, the limiting portion 42 also includes a second stop surface 422, the first end of the second stop surface 422 is connected to the second end of the first stop surface 421, the second end extends toward the direction close to the inner arc surface of the first guide groove 41, and the height of the second end of the second stop surface 422 is less than the height of the first end thereof. The locking portion 32 is provided with at least one first bonding surface 321 and at least one second bonding surface 322 at one end close to the limiting portion 42, the first bonding surface 321 is used to abut against the first stop surface 421, and the second bonding surface 322 is used to abut against the second stop surface 422.

[0036] According to the above structural design, the end of the locking portion 32 close to the limiting portion 42 and the limiting portion 42 can be constructed as ratchets that can mesh with each other. By changing the size and spacing of the ratchets, the adjustment accuracy of the cutting depth can be changed.

[0037] The guide portion 21 and the connection portion 31 can be configured as a variety of structures having a sliding connection relationship, such as a slide rail slider, a slide slot slider, a slide slot slider, etc. For example, when the guide portion 21 is configured as a slide rail, the connection portion 31 is correspondingly configured as a slider, and vice versa, when the guide portion 21 is configured as a slider, the connection portion 31 is correspondingly configured as a slide rail.

[0038] Preferably, if Figure 4 As shown, the guide portion 21 is configured as a slide groove, the connecting portion 31 is configured as a rod-shaped structure, and one end of the connecting portion 31 is disposed in the slide groove.

[0039] In order to improve the stability of the connection between the connecting member 2 and the adjusting member 3, a first stopper 22 is provided on the connecting member 2, and the first stopper 22 can be set as a plate-like structure or a block-like structure. The adjusting member 3 also includes a second stopper 33, and the second stopper 33 can be set as a plate-like structure or a block-like structure. The second stopper 33 can be connected to any one of the connecting portion 31 and the locking portion 32, and can also be connected to both the connecting portion 31 and the locking portion 32. The first stopper 22 abuts against the second stopper 33 to limit the connecting portion 31 from being separated from the guide portion 21.

[0040] Specifically, Figure 4 As shown, the second stopper 33 is disposed at one end of the connecting portion 31 away from the locking portion 32 and located in the guide portion 21 , and the first stopper 22 is disposed in the guide portion 21 or at one end of the guide portion 21 close to the locking portion 32 .

[0041] According to the above structure, when the guide portion 21 is constructed as a sliding groove and does not penetrate the connecting member 2 in the axial direction of the connecting portion 31, the groove wall of the guide portion 21 away from the guide rail 4 can also form a stop surface to prevent the second stop portion 33 from moving in a direction away from the guide rail 4.

[0042] After the locking portion 32 moves to the predetermined position of the first guide groove 41, the locking portion 32 automatically engages with the corresponding limiting portion 42. Figure 4 As shown, the cutting depth adjustment device in one embodiment of the utility model further includes an elastic member 5, and the adjustment member 3 further includes a third stopper 34, which is arranged on the locking portion 32, and the elastic member 5 is sleeved on the locking portion 32 and one end thereof abuts against the third stopper 34. The elastic member 5 is a member with a certain elasticity such as a spring, and is used to provide an elastic force driving the locking portion 32 to engage with the limiting portion 42.

[0043] like Figure 6 As shown, in order to facilitate the movement of the locking part 32, a penetrating second guide groove 43 is provided on the guide rail 4, one end of the second guide groove 43 is located on the side of the first guide groove 41 away from the limiting part 42, and the other end extends to the outer edge of the guide rail 4 in the direction away from the limiting part 42. The end of the locking part 32 away from the limiting part 42 passes through the second guide groove 43, and the user can move the locking part 32 by hand on the outside of the guide rail 4.

[0044] Further, such as Figure 7 As shown, a fourth stopper 44 and a fifth stopper 45 are provided in the second guide groove 43, and the fourth stopper 44 and the fifth stopper 45 can be provided as a plate-like structure or a block-like structure. The distance between the fourth stopper 44 and the first guide groove 41 is smaller than the distance between the fifth stopper 45 and the first guide groove 41, and the side of the third stopper 34 away from the elastic member 5 abuts against the fourth stopper 44, and the side of the elastic member 5 away from the third stopper 34 abuts against the fifth stopper 45.

[0045] According to the above structure, the elastic member 5 is arranged in the second guide groove 43, and the internal space of the second guide groove 43 is used to provide a certain deformation space for the elastic member 5, so that the locking portion 32 can smoothly engage with or disengage from the limiting portion 42.

[0046] Another embodiment of the present invention provides an electric circular saw, comprising a gripping portion 6, a cutting portion 7 and any one of the above-mentioned cutting depth adjustment devices. The cutting portion 7 is connected to the gripping portion 6, and the connecting member 2 is connected to the gripping portion 6 or the cutting portion 7.

[0047] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0048] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A cutting depth adjustment device, applied to an electric circular saw, characterized in that: The cutting depth adjustment device comprises: A bottom plate (1) is pivotally connected to the electric circular saw, and the bottom plate (1) has an opening for a saw blade of the electric circular saw to pass through; A connecting member (2) adapted to be mounted on the electric circular saw, wherein the connecting member (2) is provided with a guide portion (21); A guide rail (4) is arranged on the bottom plate (1), the guide rail (4) is provided with a first guide groove (41), and a plurality of limit portions (42) are arranged in the first guide groove (41) along its length direction; The adjusting member (3) comprises a connecting portion (31) and a locking portion (32), wherein the connecting portion (31) is configured to be connected to the guide portion (21) and to be movable along the guide portion (21), and the locking portion (32) is configured to be movable within the first guide groove (41) and to be controlledly engaged or disengaged with any one of the limiting portions (42).

2. The cutting depth adjustment device according to claim 1, characterized in that: The first guide groove (41) is arranged in an arc shape, and the limiting portion (42) includes a first stop surface (421) for abutting against the locking portion (32), the first end of the first stop surface (421) is connected to the inner arc surface of the first guide groove (41), and the second end extends in a direction away from the inner arc surface of the first guide groove (41), and the height of the second end of the first stop surface (421) is not lower than the height of the first end thereof.

3. The cutting depth adjustment device according to claim 2, characterized in that: The limiting portion (42) further comprises a second stop surface (422), a first end of the second stop surface (422) being connected to a second end of the first stop surface (421), the second end extending in a direction close to the inner arc surface of the first guide groove (41), and a height of the second end of the second stop surface (422) being smaller than a height of the first end thereof; One end of the locking portion (32) close to the limiting portion (42) is provided with at least one first bonding surface (321) and at least one second bonding surface (322), wherein the first bonding surface (321) is used to abut against the first stop surface (421), and the second bonding surface (322) is used to abut against the second stop surface (422).

4. The cutting depth adjustment device according to claim 1, characterized in that: One of the guide portion (21) and the connection portion (31) is configured as a slide groove, and the other is configured as a slide rod or a slide block matched with the slide groove.

5. The cutting depth adjustment device according to claim 4, characterized in that: The connecting member (2) is provided with a first stop portion (22), and the adjusting member (3) further comprises a second stop portion (33) provided on the connecting portion (31) and / or the locking portion (32), and the first stop portion (22) abuts against the second stop portion (33).

6. The cutting depth adjustment device according to claim 5, characterized in that: The second stop portion (33) is arranged at an end of the connecting portion (31) away from the locking portion (32) and is located in the guide portion (21); the first stop portion (22) is arranged in the guide portion (21) or at an end of the guide portion (21) close to the locking portion (32).

7. The cutting depth adjustment device according to claim 1, characterized in that: The cutting depth adjustment device further comprises an elastic member (5), the adjustment member (3) further comprises a third stop portion (34), the third stop portion (34) is arranged on the locking portion (32), the elastic member (5) is sleeved on the locking portion (32) and one end thereof abuts against the third stop portion (34).

8. The cutting depth adjustment device according to claim 7, characterized in that: The guide rail (4) is provided with a penetrating second guide groove (43), one end of the second guide groove (43) is located on a side of the first guide groove (41) away from the limiting portion (42), and the other end extends to the outer edge of the guide rail (4) in a direction away from the limiting portion (42), and one end of the locking portion (32) away from the limiting portion (42) penetrates the second guide groove (43).

9. The cutting depth adjustment device according to claim 8, characterized in that: A fourth stopper (44) and a fifth stopper (45) are provided in the second guide groove (43); a side of the third stopper (34) away from the elastic member (5) abuts against the fourth stopper (44); a side of the elastic member (5) away from the third stopper (34) abuts against the fifth stopper (45).

10. An electric circular saw, characterized in that: include: A grip portion (6); A cutting portion (7) connected to the holding portion (6); The cutting depth adjustment device according to any one of claims 1 to 9, wherein the connecting member (2) is connected to the holding portion (6) or the cutting portion (7).

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