Swing arm structure capable of reducing vibration of jig saw

Abstract

The utility model relates to the technical field of jig saws, in particular to a swing arm structure capable of reducing vibration of a jig saw, which is characterized in that the upper end of a saw blade is fixedly connected with a middle connecting rod, one end, far away from the saw blade, of the middle connecting rod is fixedly connected with a reciprocating swing arm, the outer wall of the reciprocating swing arm is provided with an outer sleeve, and the outer wall of the outer sleeve is provided with an output shaft; one end of the output shaft is fixedly connected with the output end of a motor in the jig saw body cavity, the end, away from the motor, of the output shaft penetrates through the outer sleeve, the penetrating end of the output shaft is connected with the reciprocating swing arm, and a damping block is arranged at the end, away from the output shaft, of the reciprocating swing arm. High-speed reciprocating motion and interaction force with a workpiece can enable the saw blade to generate high-frequency vibration, vibration force can be transmitted to the reciprocating swing arm through the middle connecting rod and then transmitted to the damping block through the reciprocating swing arm, the outer wall of the damping block is sunken inwards, the outer wall is recovered through the elasticity of the damping block, and therefore the vibration force can be counteracted, and the service life of the saw blade is prolonged. And the vibration frequency is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of jigsaws, in particular to a swing arm structure capable of reducing the vibration of a jigsaw. Background Technique

[0002] A jigsaw mainly consists of a series-wound motor, reduction gears, a reciprocating rod, a balance plate, a base plate, a switch, a speed regulator, etc. Jigsaws are mainly used for cutting metals and non-ferrous metals. When cutting metals, the chip disposal ability is stronger. The saw teeth are larger, and the efficiency is higher when cutting wood and other wood products.

[0003] However, during the working process of the existing jigsaws, due to the high-speed reciprocating motion of the saw blade through the swing arm and the interaction force with the workpiece, high-frequency vibrations will be generated. The high-frequency vibrations not only affect the sawing accuracy, but may also reduce the service life of the saw blade, and even pose a safety risk to the operator.

[0004] In view of the above problems, the utility model proposes a swing arm structure capable of reducing the vibration of a jigsaw. Content of the Utility Model

[0005] The purpose of the utility model is to provide a swing arm structure capable of reducing the vibration of a jigsaw, thereby solving the problems in the background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A swing arm structure capable of reducing the vibration of a jigsaw, including a saw blade installed at the lower end of the jigsaw main body. The upper end of the saw blade is fixedly connected with an intermediate connecting rod. The end of the intermediate connecting rod away from the saw blade is fixedly connected with a reciprocating swing arm. An outer sleeve is arranged on the outer wall of the reciprocating swing arm. An output shaft is arranged on the outer wall of the outer sleeve. One end of the output shaft is fixedly connected with the output end of the motor in the cavity of the jigsaw main body. The end of the output shaft away from the motor penetrates through the outer sleeve, and the penetrated end is connected with the reciprocating swing arm. The output shaft is used to drive the reciprocating swing arm to reciprocate. A shock-absorbing block is arranged at the end of the reciprocating swing arm away from the output shaft.

[0007] Preferably, the shock-absorbing block is in a semi-elliptical structure and fits the outer wall of the reciprocating swing arm.

[0008] Preferably, the shock-absorbing block is a component made of rubber material, and the inside of the shock-absorbing block is hollowed out.

[0009] Preferably, a receiving plate is fixedly connected to the end of the shock-absorbing block away from the reciprocating swing arm, and the end of the receiving plate away from the shock-absorbing block is fixedly connected to the inner wall of the outer sleeve.

[0010] Preferably, a first push plate and a second push plate are axially connected to the inner wall of the shock-absorbing block. One end of the first push plate is axially connected with a T-shaped plate A, and one end of the second push plate is axially connected with a T-shaped plate B.

[0011] Preferably, both the T-shaped plate A and the T-shaped plate B are slidably connected to the outer wall of the receiving plate, and an elastic element is fixedly connected between the T-shaped plate A and the T-shaped plate B.

[0012] Preferably, connecting rods are fixedly connected to the opposite ends of the T-shaped plate A and the T-shaped plate B, and the connecting rods are slidably connected to the openings on the side walls of the receiving plate.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] A swing arm structure capable of reducing the vibration of a jigsaw proposed by the present utility model. When the saw blade cuts, the high-speed reciprocating motion and the interaction force with the workpiece will cause the saw blade to generate high-frequency vibrations. The vibration force will be transmitted to the reciprocating swing arm through the middle connecting rod, and then conducted to the shock-absorbing block through the reciprocating swing arm, causing the outer wall of the shock-absorbing block to sink inward. The elasticity of the shock-absorbing block itself causes the outer wall to recover, thereby offsetting the vibration force and greatly reducing its vibration frequency. When the outer wall of the shock-absorbing block sinks inward, it will squeeze the first push plate and the second push plate, thereby driving the first push plate and the second push plate to deflect at an angle. The first push plate and the second push plate drive the T-shaped plate A and the T-shaped plate B to move away from each other, tension the elastic element, and the connecting rod can ensure the stability of the movement of the first push plate and the second push plate. Through the reaction force of the elastic element, the vibration frequency of the saw blade can be further reduced, the service life can be improved, the use risk can be reduced, and the problem that in the working process of the existing jigsaw, due to the high-speed reciprocating motion of the saw blade and the interaction force with the workpiece, high-frequency vibrations will be generated, which not only affects the sawing accuracy, but also may reduce the service life of the saw blade and even pose a safety risk to the operator is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the jigsaw of the present utility model;

[0016] Figure 2 is a schematic structural diagram of the middle connecting rod and the reciprocating swing arm of the present utility model;

[0017] Figure 3 is of the present utility model Figure 2 A magnified structural diagram of part A;

[0018] Figure 4 is a schematic internal structure diagram of the shock-absorbing block of the present utility model.

[0019] In the figure: 1. Jigsaw main body; 2. Saw blade; 3. Middle connecting rod; 4. Reciprocating swing arm; 5. Outer sleeve; 6. Output shaft; 7. Shock-absorbing block; 71. Receiving plate; 73. First push plate; 74. Second push plate; 75. T-shaped plate A; 76. T-shaped plate B; 77. Elastic element; 78. Connecting rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to Figures 1-4 , in order to solve the problem that in the working process of the existing jigsaw, due to the high-speed reciprocating motion of the saw blade and the interaction force with the workpiece, high-frequency vibrations will be generated. The high-frequency vibrations not only affect the sawing accuracy, but may also reduce the service life of the saw blade and even pose a safety risk to the operator, the following preferred technical solutions are provided:

[0022] A swing arm structure capable of reducing the vibration of a jigsaw, including a saw blade 2 installed at the lower end of the jigsaw main body 1. The upper end of the saw blade 2 is fixedly connected to an intermediate connecting rod 3. One end of the intermediate connecting rod 3 away from the saw blade 2 is fixedly connected to a reciprocating swing arm 4. An outer sleeve 5 is arranged on the outer wall of the reciprocating swing arm 4. An output shaft 6 is arranged on the outer wall of the outer sleeve 5. One end of the output shaft 6 is fixedly connected to the output end of the motor in the cavity of the jigsaw main body 1. The end of the output shaft 6 away from the motor penetrates the outer sleeve 5, and the penetrated end thereof is connected to the reciprocating swing arm 4. The output shaft 6 is used to drive the reciprocating swing arm 4 to reciprocate. A shock-absorbing block 7 is arranged at one end of the reciprocating swing arm 4 away from the output shaft 6.

[0023] The shock-absorbing block 7 is in a semi-elliptical structure, and the shock-absorbing block 7 fits the outer wall of the reciprocating swing arm 4. The shock-absorbing block 7 is a component made of rubber material, and the inside of the shock-absorbing block 7 is hollow. One end of the shock-absorbing block 7 away from the reciprocating swing arm 4 is fixedly connected to a receiving plate 71. One end of the receiving plate 71 away from the shock-absorbing block 7 is fixedly connected to the inner wall of the outer sleeve 5. A first push plate 73 and a second push plate 74 are axially connected to the inner wall of the shock-absorbing block 7. One end of the first push plate 73 is axially connected to a T-shaped plate A75. One end of the second push plate 74 is axially connected to a T-shaped plate B76. Both the T-shaped plate A75 and the T-shaped plate B76 are slidably connected to the outer wall of the receiving plate 71. A elastic element 77 is fixedly connected between the T-shaped plate A75 and the T-shaped plate B76. One end of the T-shaped plate A75 and the T-shaped plate B76 facing away from each other is fixedly connected to a connecting rod 78. The connecting rod 78 is slidably connected to the opening on the side wall of the receiving plate 71.

[0024] Specifically, when driving the main body 1 of the jigsaw, the internal motor can drive the reciprocating swing arm 4 to reciprocate through the output shaft 6, so that the reciprocating swing arm 4 drives the saw blade 2 to reciprocate through the middle connecting rod 3, achieving the purpose of cutting with the saw blade 2. When the saw blade 2 cuts, the high-speed reciprocating motion and the interaction force with the workpiece will cause the saw blade 2 to vibrate at a high frequency. The vibration force will be transmitted to the reciprocating swing arm 4 through the middle connecting rod 3, and then transmitted to the shock-absorbing block 7 through the reciprocating swing arm 4, causing the outer wall of the shock-absorbing block 7 to sink inward. Since the shock-absorbing block 7 is a component made of rubber material and the inside of the shock-absorbing block 7 is hollow, the outer wall is restored by the elasticity of the shock-absorbing block 7 itself, thereby canceling the vibration force and greatly reducing its vibration frequency. When the outer wall of the shock-absorbing block 7 sinks inward, it will squeeze the first push plate 73 and the second push plate 74, thereby driving the first push plate 73 and the second push plate 74 to deflect at an angle. The first push plate 73 and the second push plate 74 drive the T-shaped plate A 75 and the T-shaped plate B 76 to move away from each other, tensioning the elastic element 77, and the connecting rod 78 can ensure the stability of the movement of the first push plate 73 and the second push plate 74. Through the reaction force of the elastic element 77, the vibration frequency of the saw blade 2 can be further reduced, the service life can be prolonged, the use risk can be reduced, and the problem that in the working process of the existing jigsaw, due to the high-speed reciprocating motion of the saw blade and the interaction force with the workpiece, high-frequency vibration will be generated, and the high-frequency vibration not only affects the sawing accuracy, but also may reduce the service life of the saw blade and even pose a safety risk to the operator is solved.

[0025] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0026] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oscillating arm structure capable of reducing the vibration of a jigsaw, comprising a saw blade (2) installed at the lower end of a jigsaw main body (1), characterized in that: The upper end of the saw blade (2) is fixedly connected to a middle connecting rod (3). One end of the middle connecting rod (3) away from the saw blade (2) is fixedly connected to a reciprocating swing arm (4). An outer sleeve (5) is arranged on the outer wall of the reciprocating swing arm (4). An output shaft (6) is arranged on the outer wall of the outer sleeve (5). One end of the output shaft (6) is fixedly connected to the output end of the motor in the cavity of the jigsaw main body (1). The end of the output shaft (6) away from the motor penetrates through the outer sleeve (5), and the penetrated end is connected to the reciprocating swing arm (4). The output shaft (6) is used to drive the reciprocating swing arm (4) to move reciprocally. A shock absorber block (7) is arranged at one end of the reciprocating swing arm (4) away from the output shaft (6).

2. The swing arm structure capable of reducing the vibration of a jigsaw according to claim 1, characterized in that: The shock absorber block (7) is in a semi-elliptical structure and the shock absorber block (7) fits the outer wall of the reciprocating swing arm (4).

3. A swing arm structure capable of reducing the vibration of a jigsaw according to claim 1, characterized in that: The shock absorber block (7) is a component made of rubber material and the inside of the shock absorber block (7) is hollowed out.

4. A swing arm structure capable of reducing the vibration of a jigsaw according to claim 1, characterized in that: One end of the shock absorber block (7) away from the reciprocating swing arm (4) is fixedly connected to a bearing plate (71). One end of the bearing plate (71) away from the shock absorber block (7) is fixedly connected to the inner wall of the outer sleeve (5).

5. The swing arm structure capable of reducing the vibration of a jigsaw according to claim 4, characterized in that: A first push plate (73) and a second push plate (74) are axially connected to the inner wall of the shock absorber block (7). One end of the first push plate (73) is axially connected to a T-shaped plate A (75). One end of the second push plate (74) is axially connected to a T-shaped plate B (76).

6. The swing arm structure capable of reducing the vibration of a jigsaw according to claim 5, characterized in that: Both the T-shaped plate A (75) and the T-shaped plate B (76) are slidably connected to the outer wall of the bearing plate (71). A elastic element (77) is fixedly connected between the T-shaped plate A (75) and the T-shaped plate B (76).

7. The swing arm structure capable of reducing the vibration of a jigsaw according to claim 6, characterized in that: One end of the T-shaped plate A (75) and the T-shaped plate B (76) opposite to each other is fixedly connected to a connecting rod (78). The connecting rod (78) is slidably connected to the opening on the side wall of the bearing plate (71).

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