Brushless lithium electric circular saw with gravity center balance structure

Abstract

The utility model belongs to the technical field of electric circular saws, and particularly relates to a brushless lithium electric circular saw with a gravity center balance structure, which comprises a working table and a support frame, the support frame is fixedly connected to the middle position of the upper side of the working table, the upper side of the support frame is connected with the brushless lithium electric circular saw, and the upper side and the lower side of the working table are connected with cutting mechanisms. The cutting mechanism comprises a cutting unit and a balancing unit, the cutting unit is arranged at the upper end of the workbench, and the balancing unit is arranged at the lower end of the workbench. According to the brushless lithium electric circular saw with the gravity center balance structure, when a plate is cut, the plate to be cut is firstly placed on the upper side of the workbench, then a rotating handle is rotated to enable a threaded rod to rotate and drive a pressing plate to move downwards to the upper side of the plate at the same time, and the plate is clamped and fixed to the upper side of the workbench; and then after the brushless lithium electric circular saw is started, the brushless lithium electric circular saw is moved along the upper side of the supporting frame to cut the plate.

Description

Technical Field

[0001] The utility model relates to the technical field of electric circular saws, in particular to a brushless lithium electric circular saw with a center of gravity balance structure. Background Art

[0002] Electric circular saw is a tool that uses a single-phase series-excited motor as power and then drives the circular saw blade through a transmission mechanism to perform sawing operations. It has the characteristics of safety, reliability, and high work efficiency. The electric circular saw adopts a climbing-type appearance structure and is mainly composed of a motor, a reduction box, a protective cover, an adjustment mechanism and a bottom plate, a handle, a switch, a non-reconnectable plug, and a circular saw blade.

[0003] When using a traditional electric circular saw to cut objects, a series of tools are often needed to assist in cutting along the edges; the rotating mechanism of the electric circular saw is often fixed with simple bolts and nuts. During the operation of the electric circular saw, vibrations will be generated, loosening the nuts and creating a safety hazard.

[0004] For example, a lithium-ion electric circular saw disclosed in Chinese patent CN216263828U has a telescopic plate arranged on the bottom plate, which can realize auxiliary positioning in different situations. A semicircular groove is arranged on the rotating fixed seat to cooperate with the boss on the nut to realize secondary fixation, and the structure is more stable and reliable.

[0005] However, when the electric circular saw cuts the plate, other auxiliary tools need to be used to fix the plate, which is relatively cumbersome.

[0006] For this reason, we urgently need to provide a brushless lithium electric circular saw with a center of gravity balance structure that is convenient for fixing the plate to be cut. Utility Model Content

[0007] The utility model aims to provide a brushless lithium electric circular saw with a center of gravity balance structure to solve the problem that when the electric circular saw proposed in the above background technology cuts the plate, other auxiliary tools need to be used to fix the plate, which is relatively cumbersome.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a brushless lithium-electric circular saw with a center of gravity balancing structure, comprising a workbench and a support frame, the support frame is fixedly connected to the upper middle position of the workbench, the upper side of the support frame is connected to the brushless lithium-electric circular saw, the upper and lower sides of the workbench are connected to a cutting mechanism, the cutting mechanism comprises a cutting unit and a balancing unit, the cutting unit is arranged at the upper end of the workbench, and the balancing unit is arranged at the lower end of the workbench.

[0009] The cutting unit includes a T-shaped rod, a connecting frame, a threaded rod, a rotating handle and a pressure plate. The T-shaped rod is fixedly connected to the lower side of the brushless lithium-electric circular saw, the connecting frame is fixedly connected to the upper side of the workbench at the left and right ends of the supporting frame, the threaded rod is connected to the inside of the connecting frame, the rotating handle is fixedly connected to the upper end of the threaded rod, and the pressure plate is fixedly connected to the lower end of the threaded rod.

[0010] A further improvement is that a T-shaped slot is provided in the middle of the upper end of the support frame, the outer side of the T-shaped rod is slidably connected to the inner side of the T-shaped slot, and the lower side of the brushless lithium-electric circular saw is slidably connected to the upper side of the support frame. Therefore, when the brushless lithium-electric circular saw moves, the T-shaped rod will slide along the inner side of the T-shaped slot, thereby limiting the movement of the brushless lithium-electric circular saw.

[0011] A further improvement is that threaded holes are opened at equal distances on the upper end of the connecting frame, and the outer side of the threaded rod is threadedly connected to the inner side of the threaded hole, so that when the rotating handle is turned to drive the threaded rod in the threaded hole to rotate, the threaded rod can move relative to the connecting frame.

[0012] A further improvement is that the lower side of the pressing plate abuts against the upper side of the plate to be cut, so that after the plate to be cut is placed on the upper side of the workbench, the rotating handle is turned to rotate the threaded rod and drive the pressing plate to move down to the upper side of the plate, so that the plate can be clamped and fixed to the upper side of the workbench.

[0013] A further improvement is that the balancing unit includes a support rod, an adjustment rod and a gear plate, the support rod is fixedly connected to the four corners of the lower side of the workbench, the adjustment rod is connected to the lower end of the support rod, and the gear plate is fixedly connected to the outer side of the adjustment rod.

[0014] A further improvement is that a thread groove is provided at the middle position of the lower end of the support rod, an outer thread is provided at the upper end of the outer side of the adjustment rod, and the outer side of the upper end of the adjustment rod is threadedly connected to the inner side of the thread groove. Thus, when the upper end of the adjustment rod is driven to rotate in the thread groove by rotating the toothed disc, the distance between the bottom end of the adjustment rod and the lower side of the support rod can be changed, so that the distance between the four corners of the workbench and the ground can be fine-tuned, so that the center of gravity of the entire device is always kept in a balanced state.

[0015] A further improvement is that a rubber pad is fixedly connected to the lower side of the pressing plate, so that when the pressing plate is moved to the upper side of the plate to be cut to press the plate, the rubber pad on the lower side of the pressing plate contacts the upper side of the plate, so that the plate can be clamped and fixed more firmly.

[0016] In summary, the present application discloses a brushless lithium-electric circular saw with a center of gravity balance structure.

[0017] According to the technical solution, after placing the plate to be cut on the upper side of the workbench, the rotating handle is turned to rotate the threaded rod and drive the pressure plate to move down to the upper side of the plate, so that the plate can be clamped and fixed to the upper side of the workbench. Then, the brushless lithium-electric circular saw is turned on and moved along the upper side of the support frame to cut the plate, so that other auxiliary tools are no longer needed during the cutting process, making the cutting work more convenient.

[0018] Furthermore, by rotating the gear plate to drive the upper end of the adjusting rod to rotate in the threaded groove, the distance between the bottom end of the adjusting rod and the lower side of the support rod can be changed, so that the distance between the four corners of the workbench and the ground can be fine-tuned, so that the center of gravity of the entire device always remains balanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the support frame structure of the utility model;

[0021] Figure 3 This is a structural schematic diagram of the connecting frame of the utility model;

[0022] Figure 4 It is a structural schematic diagram of the balancing unit of the utility model.

[0023] In the figure: 1. workbench; 2. support frame; 3. brushless lithium-electric circular saw; 401. T-bar; 402. connecting frame; 403. threaded rod; 404. rotating handle; 405. pressing plate; 501. support rod; 502. adjusting rod; 503. toothed disc. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-Figure 4 , the utility model provides a technical solution: Embodiment 1

[0026] A brushless lithium-electric circular saw with a center of gravity balancing structure comprises a workbench 1 and a support frame 2, wherein the support frame 2 is fixedly connected to the middle position of the upper side of the workbench 1, a brushless lithium-electric circular saw 3 is connected to the upper side of the support frame 2, and a cutting mechanism is connected to the upper and lower sides of the workbench 1, the cutting mechanism comprises a cutting unit and a balancing unit, the cutting unit is arranged at the upper end of the workbench 1, and the balancing unit is arranged at the lower end of the workbench 1.

[0027] The cutting unit includes a T-shaped rod 401, a connecting frame 402, a threaded rod 403, a rotating handle 404 and a pressing plate 405. The T-shaped rod 401 is fixedly connected to the lower side of the brushless lithium-electric circular saw 3. A T-shaped slot is provided in the middle of the upper end of the support frame 2. The outer side of the T-shaped rod 401 is slidably connected to the inner side of the T-shaped slot, and the lower side of the brushless lithium-electric circular saw 3 is slidably connected to the upper side of the support frame 2. Therefore, when the brushless lithium-electric circular saw 3 moves, the T-shaped rod 401 will slide along the inner side of the T-shaped slot, thereby limiting the movement of the brushless lithium-electric circular saw 3.

[0028] The connecting frame 402 is fixedly connected to the upper side of the workbench 1 at the left and right ends of the supporting frame 2, the threaded rod 403 is connected to the inside of the connecting frame 402, the rotating handle 404 is fixedly connected to the upper end of the threaded rod 403, and the pressing plate 405 is fixedly connected to the lower end of the threaded rod 403. The upper end of the inner part of the connecting frame 402 is provided with threaded holes at equal distances, and the outer side of the threaded rod 403 is threadedly connected to the inner side of the threaded hole. Therefore, when the rotating handle 404 is rotated to drive the threaded rod 403 located in the threaded hole to rotate, the threaded rod 403 can be moved relative to the connecting frame 402.

[0029] The lower side of the pressing plate 405 abuts against the upper side of the plate to be cut. Thus, after the plate to be cut is placed on the upper side of the workbench 1, the rotating handle 404 is rotated to rotate the threaded rod 403 and drive the pressing plate 405 to move down to the upper side of the plate, so that the plate can be clamped and fixed to the upper side of the workbench 1. Embodiment 2

[0030] On the basis of the first embodiment: the balancing unit includes a support rod 501, an adjustment rod 502 and a toothed disc 503, wherein the support rod 501 is fixedly connected to the four corners of the lower side of the workbench 1, the adjustment rod 502 is connected to the lower end of the support rod 501, and the toothed disc 503 is fixedly connected to the outer side of the adjustment rod 502. A thread groove is provided at the middle position of the lower end of the support rod 501, an outer thread is provided at the upper end of the outer side of the adjustment rod 502, and the outer side of the upper end of the adjustment rod 502 is threadedly connected to the inner side of the thread groove. Thus, when the toothed disc 503 is rotated to drive the upper end of the adjustment rod 502 located in the thread groove to rotate, the distance between the bottom end of the adjustment rod 502 and the lower side of the support rod 501 can be changed, so that the distance between the four corners of the workbench 1 and the ground can be fine-tuned, so that the center of gravity of the entire device is always kept in a balanced state. Embodiment 3

[0031] On the basis of the first embodiment: a rubber pad is fixedly connected to the lower side of the pressing plate 405. Therefore, when the pressing plate 405 is moved to the upper side of the plate to be cut to press the plate, the rubber pad on the lower side of the pressing plate 405 contacts the upper side of the plate, so that the plate can be clamped and fixed more firmly.

[0032] Working principle: When cutting the plate, first place the plate to be cut on the upper side of the workbench 1, then turn the rotating handle 404 to rotate the threaded rod 403 while driving the pressing plate 405 to move down to the upper side of the plate, clamp the plate to the upper side of the workbench 1, then turn on the brushless lithium-electric circular saw 3 and move the brushless lithium-electric circular saw 3 along the upper side of the support frame 2 to cut the plate.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A brushless lithium-electric circular saw with a center of gravity balance structure, comprising a workbench (1) and a support frame (2), wherein the support frame (2) is fixedly connected to the middle position of the upper side of the workbench (1), and characterized in that: A brushless lithium-electric circular saw (3) is connected to the upper side of the support frame (2), and a cutting mechanism is connected to the upper and lower sides of the workbench (1), wherein the cutting mechanism comprises a cutting unit and a balancing unit, wherein the cutting unit is arranged at the upper end of the workbench (1), and the balancing unit is arranged at the lower end of the workbench (1); The cutting unit comprises a T-shaped rod (401), a connecting frame (402), a threaded rod (403), a rotating handle (404) and a pressing plate (405); the T-shaped rod (401) is fixedly connected to the lower side of the brushless lithium electric circular saw (3); the connecting frame (402) is fixedly connected to the upper side of the workbench (1) at the left and right ends of the support frame (2); the threaded rod (403) is connected to the inside of the connecting frame (402); the rotating handle (404) is fixedly connected to the upper end of the threaded rod (403); and the pressing plate (405) is fixedly connected to the lower end of the threaded rod (403).

2. The brushless lithium electric circular saw with a center of gravity balance structure according to claim 1, characterized in that: A T-shaped slot is provided in the middle of the upper end of the support frame (2); the outer side of the T-shaped rod (401) is slidably connected to the inner side of the T-shaped slot; and the lower side of the brushless lithium electric circular saw (3) is slidably connected to the upper side of the support frame (2).

3. The brushless lithium electric circular saw with a center of gravity balance structure according to claim 1, characterized in that: The upper end of the interior of the connecting frame (402) is provided with threaded holes at equal distances, and the outer side of the threaded rod (403) is threadedly connected to the inner side of the threaded hole.

4. The brushless lithium electric circular saw with a center of gravity balance structure according to claim 1, characterized in that: The lower side of the pressing plate (405) abuts against the upper side of the plate to be cut.

5. The brushless lithium electric circular saw with a center of gravity balance structure according to claim 1, characterized in that: The balancing unit comprises a support rod (501), an adjustment rod (502) and a toothed disc (503); the support rod (501) is fixedly connected to the four corners of the lower side of the workbench (1); the adjustment rod (502) is connected to the lower end of the support rod (501); and the toothed disc (503) is fixedly connected to the outer side of the adjustment rod (502).

6. The brushless lithium electric circular saw with a center of gravity balance structure according to claim 5, characterized in that: A thread groove is provided at the middle position of the lower end of the support rod (501), an external thread is provided at the upper end of the outer side of the adjustment rod (502), and the outer side of the upper end of the adjustment rod (502) is threadedly connected to the inner side of the thread groove.

7. The brushless lithium electric circular saw with a center of gravity balance structure according to claim 1, characterized in that: A rubber pad is fixedly connected to the lower side of the pressing plate (405).

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