CN220823735U - Portable sawing machine - Google Patents

Abstract

The utility model discloses a portable sawing machine in the field of life tools, comprising a guide cylinder, a motor box, a transmission mechanism and a saw blade, the transmission mechanism comprising a sliding sleeve and a transmission shaft, the sliding sleeve is slidably arranged in the guide cylinder and cannot rotate relative to the guide cylinder, a pressing block is arranged at one end of the sliding sleeve away from the motor box, the pressing block is connected to the saw blade after passing through the guide opening at the front end of the guide cylinder, one end of the transmission shaft is slidably arranged in the guide cylinder, and the other end is connected to the motor in the motor box, the outer wall of the transmission shaft is provided with a wavy guide groove extending along its circumferential direction, and the sliding sleeve is provided with a rolling ball matching the wavy guide groove. The utility model utilizes the cooperation of the transmission shaft and the sleeve to convert the rotary motion of the motor into the back and forth reciprocating motion of the sleeve, thereby driving the saw blade to realize the reciprocating sawing action, the whole sawing process is stable and impact-free, the sawing machine has a simple structure, light weight, and is easy to use, and the saw blade can be in an arc or straight shape to meet different use requirements.

Description

Portable sawing machine

Technical Field

The utility model relates to the field of life tools, in particular to a portable sawing machine.

Background technique

When cultivating artificially planted trees, it is not only necessary to control the natural environment such as water, sunlight, and soil that they need, but also to prune them regularly to assist the growth of artificially planted trees and improve their growth efficiency. At present, there are two main ways to prune large branches. One is the manual method, which is relatively inefficient and labor-intensive; the other method uses an electric chain saw, such as the portable chain saw published by the Chinese utility model with authorization announcement number CN217621052U, which converts the power source of the chain saw from a traditional internal combustion engine and an AC power supply to a DC power supply. When sawing, the motor drives the chain saw on the support guide plate to move quickly through the transmission mechanism to complete the sawing. When sawing, the chain of the chain sawing machine will vibrate and easily slip. In addition, the chain saw maintains the support guide plate through tension, and the sawing work area cannot be concave such as a sickle bend, which affects the convenience of the sawing machine. In addition, the chain sawing machine is easy to cause impact on the tree, affecting the flatness of the cut.

Utility Model Content

In order to overcome the above-mentioned deficiencies of the existing chain sawing machines, the technical problem to be solved by the utility model is to provide a portable sawing machine with a simple structure and a smooth and impact-free sawing process.

The technical solution adopted by the utility model to solve its technical problems is:

A portable sawing machine includes a frame and a motor, a transmission mechanism and a saw blade located on the frame, the frame includes a guide cylinder and a motor box connected at one end, the transmission mechanism includes a sliding sleeve and a transmission shaft, the sliding sleeve is slidably arranged in the guide cylinder and cannot rotate relative to the guide cylinder, a pressure block is provided at the end of the sliding sleeve away from the motor box, the pressure block is connected to the saw blade after passing through a guide opening at the front end of the guide cylinder, one end of the transmission shaft is slidably arranged in the guide cylinder, and the other end extends into the motor box and is connected to the main shaft of the motor in the motor box, a wavy guide groove extending along its circumferential direction is provided on the outer wall of the part of the transmission shaft located in the sliding sleeve, and a rolling ball matching the wavy guide groove is provided on the sliding sleeve.

Furthermore, the outer wall of the sliding sleeve and the inner wall of the guide cylinder are matched rectangular structures, and the inner cavity of the sliding sleeve is cylindrical and matched with the transmission shaft.

Furthermore, the guide cylinder, the sliding sleeve and the transmission shaft are all cylindrical shapes that fit together, the guide opening at the front end of the guide cylinder has a rectangular cross section, and the pressing block is a square column that fits with the guide opening.

Furthermore, a mounting groove is provided in the middle of the pressing block along its axial direction, one end of the saw blade is located in the mounting groove and is fixed to the pressing block by a countersunk screw.

Furthermore, a mounting hole is provided on the sliding sleeve at a portion connected to the rolling ball, and the rolling ball is placed in the mounting hole and is restricted in the mounting hole by the cooperation of the inner wall of the guide cylinder and the wavy guide groove.

Furthermore, the rolling balls include at least two, which are arranged on the circumference of the sliding sleeve in a rotationally symmetrical manner and are aligned with the wave-shaped guide groove.

Furthermore, the end of the transmission shaft away from the sliding sleeve is connected to the main shaft of the motor through a connecting sleeve and a connecting key, and a guide hole is provided at the end of the motor box close to the guide cylinder. The transmission shaft passes through the guide hole and is restricted to rotate in the guide hole by the shoulders and retaining rings abutting against the two ends of the guide hole.

Furthermore, a handle is provided below the motor box, a battery clip is provided inside the handle, a battery is provided inside the battery clip, a charging port connected to the battery is provided at the bottom of the handle, and a switch for connecting or disconnecting the wire connecting the motor to the battery is provided at the rear end of the motor box.

Furthermore, the guide cylinder is an integrally formed structure, the motor box and the handle are formed by splicing two integrally formed left and right half shells, and the guide cylinder and the motor box are connected together by screws.

Furthermore, a handle is provided above the guide cylinder.

The beneficial effects of the utility model are as follows: a transmission mechanism formed by the cooperation of a transmission shaft with a wavy guide groove and a sleeve with a rolling ball is used to smoothly convert the rotary motion of the motor into the forward and backward reciprocating motion of the sleeve, thereby driving the saw blade to realize reciprocating sawing action, which can ensure that the entire sawing process is smooth and impact-free, and the incision is smooth; the entire sawing machine has a simple structure, light weight, and is easy to use, and the saw blade can be in an arc or straight shape to meet different usage requirements.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a top view of the utility model;

Fig. 2 is a cross-sectional view of A-A in Fig. 1;

Fig. 3 is a cross-sectional view of B-B in Fig. 1;

FIG4 is an enlarged view of portion C in FIG2 ;

FIG5 is an enlarged view of portion D in FIG2;

Marked in the figure are, 1-motor, 2-saw blade, 3-guide cylinder, 4-motor box, 5-handle, 6-slide, 7-drive shaft, 11-spindle, 12-connecting sleeve, 13-connecting key, 31-guide port, 32-handle, 41-guide hole, 42-switch, 51-battery clamp, 52-battery, 53-charging port, 61-pressure block, 62-rolling ball, 63-countersunk screw, 64-mounting hole, 71-wavy guide groove, 72-shaft shoulder, 73-retaining ring.

Detailed ways

The utility model is further described below in conjunction with the accompanying drawings.

It should be noted that if there are directional indication terms in the present invention, such as up, down, left, right, front, and back directions and orientation terms, they are for the purpose of facilitating the description of the relative position relationship between components, and are not for the absolute position of the related components or the position relationship between components. They are only used to explain the relative position relationship and movement of the components in a certain posture. If the specific posture changes, the directional indication will also change accordingly. If there are terms related to quantity in the present invention, such as "multiple", "multiple", "several", etc., they specifically refer to two or more.

As shown in Figures 1-5, the portable sawing machine of the utility model includes a frame and a motor 1, a transmission mechanism and a saw blade 2 located on the frame. The frame includes a guide cylinder 3 and a motor box 4 connected at one end. The transmission mechanism includes a sleeve 6 and a transmission shaft 7. The sleeve 6 is slidably arranged in the guide cylinder 3 and cannot rotate relative to the guide cylinder 3. A pressure block 61 is provided at the end of the sleeve 6 away from the motor box 4. The pressure block 61 passes through the guide opening 31 at the front end of the guide cylinder 3 and is connected to the saw blade 2. One end of the transmission shaft 7 is slidably arranged in the guide cylinder 3, and the other end extends into the motor box 4 and is connected to the main shaft 11 of the motor 1 in the motor box 4. The outer wall of the part of the transmission shaft 7 located in the sleeve 6 is provided with a wavy guide groove 71 extending along its circumferential direction, and the sleeve 6 is provided with a rolling ball 62 matching the wavy guide groove 71. The working process of the utility model is that the motor 1 drives the transmission shaft 7 to rotate. Since the sliding sleeve 6 cannot rotate relative to the guide cylinder 3, the transmission shaft 7 will force the rolling ball 62 to slide along the wavy guide groove 71 when rotating, thereby driving the sliding sleeve 6 to move forward and backward along the guide cylinder 3, and then the saw blade 2 can achieve reciprocating sawing action. In order to make the transmission smooth, the amplitude and pressure angle of the reciprocating motion need to be comprehensively considered during the design to determine the size of each structural component. Compared with the traditional chain saw, the sawing machine of the utility model has a smoother sawing process, no impact, and a smooth incision. In addition, the entire sawing machine has a simple structure, light weight, and is easy to use. The saw blade can be in an arc or straight shape to meet different usage requirements.

Regarding the sliding connection between the sliding sleeve 6 and the guide cylinder 3, the utility model provides the following two solutions:

The first is that the outer wall of the sliding sleeve 6 and the inner wall of the guide cylinder 3 are matched rectangular structures, which can realize the sliding of the sliding sleeve 6 relative to the guide cylinder 3 and restrict the relative rotation of the two. In order to realize the rotation connection between the sliding sleeve 6 and the transmission shaft 7, the inner cavity of the sliding sleeve 6 can be set to a cylindrical shape that matches the transmission shaft 7.

The second is that the guide cylinder 3, the sliding sleeve 6 and the transmission shaft 7 are all cylindrically matched with each other, the guide opening 31 at the front end of the guide cylinder 3 has a rectangular cross section, and the pressing block 61 is a square column matched with the guide opening 31. This solution only limits the relative rotation of the sliding sleeve 6 and the transmission shaft 7 by the cooperation between the guide opening 31 and the pressing block 61. The three main components of the guide cylinder 3, the sliding sleeve 6 and the transmission shaft 7 are all cylindrical structures, which can better control the sizes of the three components, reduce the matching clearance, and improve the stability of the transmission. Therefore, the second solution is preferred.

For the installation of the saw blade 2, the solution adopted by the utility model is that a mounting groove is provided in the middle of the pressing block 61 along its axial direction, one end of the saw blade 2 is located in the mounting groove and is fixed to the pressing block 61 by a countersunk screw 63. The width of the saw blade 2 can be set to be consistent with the height of the pressing block 61. If the width of the saw blade 2 exceeds the height of the pressing block 61, as shown in FIG. 3, the guide opening 31 needs to be set to a matching Chinese character "中". The screw head of the countersunk screw 63 needs to be completely sunk into the pressing block 61 to ensure that the side of the pressing block 61 is flat.

When installing the rolling ball 62, the preferred solution of the utility model is that, as shown in Figure 4, a mounting hole 64 is provided on the sliding sleeve 6 at a portion connected to the rolling ball 62, and the rolling ball 62 is placed in the mounting hole 64 and is restricted in the mounting hole 64 by the cooperation of the inner wall of the guide cylinder 3 and the wavy guide groove 71.

In order to ensure smooth transmission, the rolling balls 62 should include at least two and be arranged on the circumference of the sleeve 6 in a rotationally symmetrical manner and aligned with the wave-shaped guide groove 71. The rotational motion of the transmission shaft 7 is converted into the linear motion of the sleeve 6 by multiple rolling balls 62, so that the force can be more evenly dispersed and the operation of the entire mechanism is more stable and reliable.

As for the connection between the transmission shaft 7 and the sleeve 6, as shown in FIG5, the end of the transmission shaft 7 away from the sleeve 6 is connected to the main shaft 11 of the motor 1 through the connecting sleeve 12 and the connecting key 13, and the end of the motor box 4 close to the guide cylinder 3 is provided with a guide hole 41, and the transmission shaft 7 passes through the guide hole 41 and is restricted to rotate in the guide hole 41 by the shaft shoulder 72 and the retaining ring 73 abutting against the two ends of the guide hole 41. Using the connecting sleeve 12 and the connecting key 13 to connect the main shaft 11 of the motor 1 and the transmission shaft 7 is a conventional connection method. Using the shaft shoulder 72 and the retaining ring 73 to limit the axial position of the transmission shaft 7 can prevent it from being subjected to the reaction force of the saw blade 2 and axial movement.

In order to facilitate the operation of the sawing machine and to provide power for the sawing machine, a handle 5 is provided below the motor box 4, a battery clip 51 is provided inside the handle 5, a battery 52 is provided inside the battery clip 51, a charging port 53 connected to the battery 52 is provided at the bottom of the handle 5, and a switch 42 for connecting or disconnecting the wire connecting the motor 1 and the battery 52 is provided at the rear end of the motor box 4. Of course, depending on the power, the battery 52 may not be provided in the handle 5, but may be directly connected to an external power source through a power cord. Furthermore, in order to achieve two-handed operation, a handle 32 is provided above the guide cylinder 3. The operation allows one hand to hold the handle 5 to hold the sawing machine, and the other hand to hold the handle 32 and press down, thereby improving the sawing efficiency.

Finally, for the entire frame, in order to facilitate the assembly of internal parts and ensure the connection of some parts with high matching accuracy requirements, the guide cylinder 3 can be set as an integrated structure to facilitate the improvement of its processing accuracy, thereby ensuring the assembly accuracy with the internal sliding sleeve 6. For the motor box 4 and the handle 5, the two can be combined together, and the two half shells of the left and right parts can be assembled together, which is convenient for assembling internal parts, and then the guide cylinder 3 and the motor box 4 are connected together by screws.

Claims (10)

1. A portable sawing machine, characterized in that it comprises a frame, a motor (1), a transmission mechanism and a saw blade (2) located on the frame, the frame comprising a guide cylinder (3) and a motor box (4) connected at one end, the transmission mechanism comprising a sliding sleeve (6) and a transmission shaft (7), the sliding sleeve (6) being slidably arranged in the guide cylinder (3) and being unable to rotate relative to the guide cylinder (3), a pressing block (61) being arranged at one end of the sliding sleeve (6) away from the motor box (4), the pressing block (61) passing through a guide opening (31) at the front end of the guide cylinder (3) and being connected to the saw blade (2), one end of the transmission shaft (7) being slidably arranged in the guide cylinder (3), and the other end extending into the motor box (4) and being connected to a main shaft (11) of the motor (1) in the motor box (4), a wave-shaped guide groove (71) extending in a circumferential direction thereof being arranged on the outer wall of the portion of the transmission shaft (7) located in the sliding sleeve (6), and a rolling ball (62) matching the wave-shaped guide groove (71) being arranged on the sliding sleeve (6). 2. The portable sawing machine as described in claim 1 is characterized in that the outer wall of the sliding sleeve (6) and the inner wall of the guide cylinder (3) are matched rectangular structures, and the inner cavity of the sliding sleeve (6) is cylindrical and matched with the transmission shaft (7). 3. The portable sawing machine as described in claim 1 is characterized in that: the guide cylinder (3), the sliding sleeve (6) and the transmission shaft (7) are all cylindrical shapes that match each other, the cross-section of the guide opening (31) at the front end of the guide cylinder (3) is rectangular, and the pressure block (61) is a square column that matches the guide opening (31). 4. The portable sawing machine as described in claim 3 is characterized in that: a mounting groove is provided in the middle of the pressure block (61) along its axial direction, one end of the saw blade (2) is located in the mounting groove and is fixed to the pressure block (61) by a countersunk screw (63). 5. The portable sawing machine as described in claim 1 is characterized in that: a mounting hole (64) is provided on the sliding sleeve (6) at a portion connected to the rolling ball (62), and the rolling ball (62) is placed in the mounting hole (64) and is restricted in the mounting hole (64) by the cooperation of the inner wall of the guide cylinder (3) and the wavy guide groove (71). 6. The portable sawing machine according to claim 5, characterized in that the rolling balls (62) include at least two, which are arranged on the circumference of the sliding sleeve (6) in a rotationally symmetrical manner and are aligned with the wave-shaped guide groove (71). 7. The portable sawing machine as described in claim 1 is characterized in that: the end of the transmission shaft (7) away from the sliding sleeve (6) is connected to the main shaft (11) of the motor (1) through a connecting sleeve (12) and a connecting key (13), and the end of the motor box (4) close to the guide cylinder (3) is provided with a guide hole (41), and the transmission shaft (7) passes through the guide hole (41) and is restricted to rotate in the guide hole (41) by the shaft shoulders (72) and the retaining ring (73) abutting against the two ends of the guide hole (41). 8. A portable sawing machine as described in any one of claims 1 to 7, characterized in that: a handle (5) is provided below the motor box (4), a battery clip (51) is provided inside the handle (5), a battery (52) is provided inside the battery clip (51), a charging port (53) connected to the battery (52) is provided at the bottom of the handle (5), and a switch (42) for connecting or disconnecting the wire connecting the motor (1) and the battery (52) is provided at the rear end of the motor box (4). 9. The portable sawing machine as described in claim 8 is characterized in that: the guide cylinder (3) is an integrally formed structure, the motor box (4) and the handle (5) are formed by splicing two integrally formed left and right half shells, and the guide cylinder (3) and the motor box (4) are connected together by screws. 10. The portable sawing machine according to claim 8, characterized in that a handle (32) is provided above the guide cylinder (3).