CN221186849U

CN221186849U - Reciprocating saw

Info

Publication number: CN221186849U
Application number: CN202323148107.4U
Authority: CN
Inventors: 钟华; 李祥庆
Original assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Current assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Priority date: 2023-11-21
Filing date: 2023-11-21
Publication date: 2024-06-21
Anticipated expiration: 2033-11-21

Abstract

The utility model relates to a reciprocating saw, which comprises a shell, a motor component, a transmission component, a reciprocating rod component and a guide rail component, wherein the motor component is accommodated in the shell; the guide rail assembly comprises a guide rail and a roller assembly arranged on the guide rail, the roller assembly comprises rolling bodies movably connected to the guide rail, and the sliding grooves are attached to the rolling bodies. According to the utility model, the sliding motion of the reciprocating rod assembly relative to the guide rail assembly is changed into rolling motion, so that the friction force of the reciprocating rod assembly in the motion process is reduced, and the working efficiency is further improved.

Description

Reciprocating saw

[ Field of technology ]

The utility model relates to the technical field of electric tools, in particular to a reciprocating saw for occasions such as decoration, construction and the like.

[ Background Art ]

The reciprocating saw is a reciprocating electric tool for cutting timber, metal and other materials, and is widely used in furniture decoration and other fields. In actual operation, the motion conversion mechanism of the reciprocating saw converts the rotary motion of the motor assembly into the reciprocating motion of the reciprocating rod so as to drive the saw blade to perform high-frequency cutting operation.

The reciprocating saw in the prior art is mainly realized by virtue of the reciprocating motion of a reciprocating shaft, two ends of a reciprocating rod are respectively provided with a bearing, and the bearings are fixed on an upper cover through structures such as a pressing plate, a screw and the like. In order to achieve the guiding of the reciprocating lever, the existing method is as follows:

The first method is as follows: a sliding groove is welded on the reciprocating shaft, the sliding plate is fixedly arranged on the upper cover, and the sliding groove slides on the sliding plate during reciprocating motion, so that guiding is realized.

The second method is as follows: the back side of the reciprocating shaft is made into a flat plate shape, two pins are fixedly arranged on the two side surfaces of the flat plate by the upper cover, and the flat plate slides on the two pins during reciprocating motion to realize guiding.

At present, the guide of the reciprocating shaft adopts a sliding mode, so that the friction is large and the efficiency is low.

In view of the foregoing, it is desirable to provide an improved reciprocating saw that overcomes the shortcomings of the prior art.

[ utility model ]

Aiming at the defects of the prior art, the utility model aims to provide a reciprocating saw with high working efficiency.

The utility model solves the problems in the prior art by adopting the following technical scheme: the reciprocating saw comprises a shell, a motor component, a transmission component, a reciprocating rod component and a guide rail component, wherein the motor component is accommodated in the shell, the transmission component is connected with the motor component, the reciprocating rod component is driven by the transmission component, the guide rail component is used for supporting the reciprocating rod component, the reciprocating rod component comprises a reciprocating rod and a sliding groove connected with the reciprocating rod, and the sliding groove moves reciprocally along the guide rail component; the guide rail assembly comprises a guide rail and a roller assembly arranged on the guide rail, the roller assembly comprises rolling bodies movably connected to the guide rail, and the sliding grooves are attached to the rolling bodies.

The further improvement scheme is as follows: the roller assembly comprises a rotating shaft penetrating through the guide rail, and the rolling bodies are installed on the rotating shaft and rotate around the rotating shaft.

The further improvement scheme is as follows: the guide rail comprises a guide rail main body and a pair of shoulders protruding from two ends of the guide rail main body towards the sliding groove, and the rolling bodies are arranged on the pair of shoulders.

The further improvement scheme is as follows: the guide rail comprises a mounting groove recessed from the end face of the shoulder, the rotating shaft penetrates through the mounting groove, and the rolling bodies are at least partially accommodated in the mounting groove.

The further improvement scheme is as follows: both ends of the chute are respectively supported by the rolling bodies.

The further improvement scheme is as follows: the guide rail includes a channel defined by the guide rail body and a pair of shoulders, and the reciprocating lever extends to and moves within the channel.

The further improvement scheme is as follows: the rolling bodies are arranged at intervals along the extending direction of the reciprocating rod.

The further improvement scheme is as follows: in the extending direction of the reciprocating lever, the sliding groove is at least simultaneously contacted with two rolling bodies.

The further improvement scheme is as follows: the rolling bodies are bearings.

Compared with the prior art, the utility model has the following beneficial effects: the sliding motion of the reciprocating rod assembly relative to the guide rail assembly is changed into rolling motion, so that the friction force born by the reciprocating rod assembly in the motion process is reduced, and the working efficiency is further improved.

[ Description of the drawings ]

FIG. 1 is a schematic illustration of the attachment of a reciprocating saw of the present utility model with a fence assembly and a dust collection assembly;

FIG. 2 is a schematic cross-sectional view of the reciprocating saw of FIG. 1;

FIG. 3 is a schematic illustration of the attachment of the guide rail assembly and the reciprocating bar assembly of the reciprocating saw of FIG. 1;

FIG. 4 is a schematic view of another angular connection of the rail assembly and the reciprocating lever assembly of FIG. 3;

FIG. 5 is a schematic cross-sectional view of the rail assembly and reciprocating bar assembly of FIG. 3.

[ Detailed description ] of the invention

The utility model will be described in further detail with reference to the drawings and embodiments.

The terminology used in the present utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The words such as "upper", "lower", "front", "rear", "left", "right", etc., indicating an azimuth or a positional relationship are merely based on the azimuth or the positional relationship shown in the drawings, and are merely for convenience of description and to simplify the description, and do not indicate or imply that the devices/elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.

Referring to fig. 1 and 2, an embodiment of the present utility model relates to a reciprocating saw 100, on which a saw blade 200 is detachably mounted to perform sawing operations on wood or the like. The reciprocating saw 100 comprises a casing 1, a motor assembly 2 accommodated in the casing 1, a transmission assembly 3 connected to the motor assembly 2, a reciprocating rod assembly 4 driven by the transmission assembly 3, a guide rail assembly 5 for supporting the reciprocating rod assembly 4, a clamping mechanism 7 arranged at the front end of the reciprocating rod assembly 4, a supporting shoe 8 for adjusting the extending length of a saw blade 200, a circuit board assembly 9 for controlling the running state of the motor assembly 2 and a battery pack 300 for providing electric energy for the motor assembly 2, wherein the saw blade 200 is detachably arranged on the clamping mechanism 7, and the motor assembly 2 drives the reciprocating rod assembly 4 to reciprocate through the transmission assembly 3 so as to drive the saw blade 200 to perform high-frequency motion.

In this embodiment, the casing 1 includes a first housing 11 having a grip portion 13 formed at a rear end thereof and a second housing 12 connected to a front end of the first housing 11, the grip portion 13 and the first housing 11 being spaced apart to form a space 14 for a user's hand to place, and a switch trigger 15 for triggering the motor assembly 2 being further provided on the grip portion 13; the battery pack 300 is mounted to the bottom of the first housing 11, the motor assembly 2 is disposed in the first housing 11 and extends to the second housing 12, and the circuit board assembly 9 is disposed at the lower side of the motor assembly 2 relatively obliquely.

Referring to fig. 2, a fan assembly 21 is mounted on a motor shaft of the motor assembly 2, an air inlet 18 is formed in the housing 1 adjacent to the circuit board assembly 9, and an air outlet 19 is formed in the housing 1 adjacent to the fan assembly 21. The fan assembly 21 is a centrifugal fan, the motor assembly 2 rotates while driving the fan assembly 21 to rotate at a high speed, and forms a cooling airflow channel sucked from the air inlet 18 and discharged from the air outlet 19, the circuit board assembly 9 is located at the upstream of the cooling airflow channel, the motor assembly 2 is located at the downstream of the cooling airflow channel, i.e. the cooling airflow sucked from the outside flows through the circuit board assembly 9, then blows to the motor assembly 2, and then flows out from the air outlet 19.

In the present embodiment, the transmission assembly 3, the reciprocating bar assembly 4 and the guide rail assembly 5 are all accommodated in the second housing 12, the supporting shoe 8 is mounted to and protrudes to the front end of the second housing 12, the end portion of the saw blade 200 is held by the clamping mechanism 7, and the middle portion is also supported by the supporting shoe 8.

Referring to fig. 2, the transmission assembly 3 includes a middle shaft 31 accommodated in a gear case, a large bevel gear 32 sleeved on the outer periphery of the middle shaft, a crank disk 34, an eccentric pin 33 connected between the large bevel gear 32 and the crank disk 34, a crank pin 35 connected between the crank disk 34 and the reciprocating rod 4, and a counterweight 36, wherein the middle shaft 31 is rotatably mounted to the gear case through a bearing, and the middle shaft 31 is disposed substantially perpendicular to a motor shaft. The lower end of the large bevel gear 32 forms a bevel gear, and the motor shaft is engaged with the lower end of the large bevel gear 32, so that the rotation of the motor assembly 2 is transmitted to the transmission assembly 3. The large bevel gear 32 is provided with a positioning pin protruding upwards from the end surface, the positioning pin is positioned on the central axis of the intermediate shaft 31, the eccentric pin 33 is in interference fit connection with the large bevel gear 32, and the eccentric pin 33 deviates from the central axis of the intermediate shaft 31; the crank disk 34 is connected to the large bevel gear 32 by a locating pin and an eccentric pin, and the crank disk 34 rotates eccentrically around the motor shaft.

Further, the crank plate 34 has an eccentric portion protruding downward from the lower end surface and a crank portion protruding upward from the upper end surface, and the eccentric portion and the crank portion are located on both sides of the end surface of the crank plate 34 and are distributed on both sides of a plane on which the central axis of the intermediate shaft 31 is located. The counterweight 36 is sleeved on the outer periphery of the eccentric part, and drives the counterweight 36 to reciprocate approximately along the axial direction of the motor shaft. A crank pin 35 is mounted to the crank portion and is connected to the reciprocating rod assembly 4 to reciprocate the reciprocating rod assembly 4 generally along the axial direction of the motor shaft.

Preferably, the outer circumference of the crank pin 35 is sleeved with a needle bearing and a shaft sleeve, and the crank pin 35 and the eccentric part respectively drive the reciprocating rod assembly 4 and the counterweight 36 to move in opposite directions so as to reduce vibration and noise when the reciprocating saw 100 operates.

Referring to fig. 2 again, the reciprocating saw 100 further includes a knife lifting mechanism 10 for driving the reciprocating bar assembly 4 to swing along the axial direction of the intermediate shaft 31. The cutter lifting mechanism 10 is provided with a cutter lifting wheel and a cutter lifting pin connected with the cutter lifting wheel, and the cutter lifting pin can adjust the cutter lifting wheel to be abutted against or separated from the large gear 32; the upper end surface of the large gear 32 is cam-shaped, and when the cutter lifting wheel is abutted against the large gear 32, the large gear 32 rotates to drive the cutter lifting wheel to move along the axial direction of the intermediate shaft 31, so as to drive the reciprocating rod assembly 4 to swing.

In this embodiment, the motor assembly 2 is a dc brushless motor, the circuit board assembly 9 is electrically connected between the battery pack 300 and the motor assembly 2, and the circuit board assembly 9 controls the power supply of the battery pack 300 to the motor assembly 2; and the switch trigger 15 is also electrically connected to the circuit board assembly 9, and when the user presses the switch trigger 15, a signal can be generated to the circuit board assembly 9, so as to control the operation of the motor assembly 2.

Referring to fig. 3, the reciprocating bar assembly 4 includes a reciprocating bar 41 and a sliding slot 42 connected to the reciprocating bar 41, wherein the sliding slot 42 is fixed to the reciprocating bar 41 by welding, and the crank pin 35 is mounted in the sliding slot 42 and drives the reciprocating bar 41 and the sliding slot 42 to reciprocate along the guide rail assembly 5.

As shown in fig. 4, the guide rail assembly 5 includes a guide rail 51 extending along an extending direction a of the reciprocating bar 41 and a roller assembly 52 mounted on the guide rail 51, the roller assembly 52 includes a rotating shaft 522 penetrating through the guide rail 51 and a rolling element 521 movably connected to the guide rail 51, the rotating shaft 522 is mounted on the guide rail 51 in an interference manner, the rolling element 521 is sleeved on an outer periphery of the rotating shaft 522 and rotates around the rotating shaft 522, and the sliding groove 42 abuts against the rolling element 521, so as to realize rolling contact between the sliding groove 42 and the roller assembly 52. By changing the sliding motion of the reciprocating bar assembly 4 relative to the guide rail assembly 5 into rolling motion, the friction force applied to the reciprocating bar assembly 4 in the motion process can be reduced, and the working efficiency is further improved.

Referring to fig. 5, the guide rail 51 includes a guide rail body 511, a pair of shoulders 512 protruding from both ends of the guide rail body 511 toward the sliding groove 42, a mounting groove 513 recessed from an end surface of the shoulders 512, and a channel 514 defined by the guide rail body 511 and the pair of shoulders 512, wherein the rolling elements 521 are mounted in the pair of shoulders 512. Specifically, the rotating shaft 522 is disposed through the mounting groove 513, and the rolling element 521 is at least partially received in the mounting groove 513, and at least partially protrudes out of the mounting groove 513 to contact the sliding groove 42.

Further, both ends of the chute 42 are supported by rolling elements 521.

Further, the reciprocating lever 41 extends to the channel 514 and moves within the channel 514.

As shown in fig. 4, the rolling elements 521 are arranged at intervals along the extending direction a of the reciprocating bar 41; and in the extension direction a of the reciprocating bar 41, the runner 42 is in contact with at least two rolling bodies 521 at the same time, so that the movement of the reciprocating bar assembly 4 is smoother.

In the present embodiment, the rolling elements 521 are bearings.

According to the utility model, the sliding motion of the reciprocating rod assembly 4 relative to the guide rail assembly 5 is changed into rolling motion, so that the friction force of the reciprocating rod assembly 4 in the motion process can be effectively reduced, and the working efficiency is further improved.

The present utility model is not limited to the above-described embodiments. Those skilled in the art will readily appreciate that many other alternatives to the reciprocating saw of the present utility model are possible without departing from the spirit and scope of the present utility model. The protection scope of the present utility model is subject to the claims.

Claims

1. The reciprocating saw comprises a shell, a motor component, a transmission component, a reciprocating rod component and a guide rail component, wherein the motor component is accommodated in the shell, the transmission component is connected with the motor component, the reciprocating rod component is driven by the transmission component, the guide rail component is used for supporting the reciprocating rod component, the reciprocating rod component comprises a reciprocating rod and a sliding groove connected with the reciprocating rod, and the sliding groove moves reciprocally along the guide rail component; the method is characterized in that: the guide rail assembly comprises a guide rail and a roller assembly arranged on the guide rail, the roller assembly comprises rolling bodies movably connected to the guide rail, and the sliding grooves are attached to the rolling bodies.

2. The reciprocating saw of claim 1, wherein: the roller assembly comprises a rotating shaft penetrating through the guide rail, and the rolling bodies are installed on the rotating shaft and rotate around the rotating shaft.

3. The reciprocating saw of claim 2, wherein: the guide rail comprises a guide rail main body and a pair of shoulders protruding from two ends of the guide rail main body towards the sliding groove, and the rolling bodies are arranged on the pair of shoulders.

4. A reciprocating saw as defined in claim 3, wherein: the guide rail comprises a mounting groove recessed from the end face of the shoulder, the rotating shaft penetrates through the mounting groove, and the rolling bodies are at least partially accommodated in the mounting groove.

5. The reciprocating saw as defined in claim 4, wherein: both ends of the chute are respectively supported by the rolling bodies.

6. The reciprocating saw as defined in claim 5, wherein: the guide rail includes a channel defined by the guide rail body and a pair of shoulders, and the reciprocating lever extends to and moves within the channel.

7. The reciprocating saw of claim 1, wherein: the rolling bodies are arranged at intervals along the extending direction of the reciprocating rod.

8. The reciprocating saw of claim 7, wherein: in the extending direction of the reciprocating lever, the sliding groove is at least simultaneously contacted with two rolling bodies.

9. The reciprocating saw of claim 1, wherein: the rolling bodies are bearings.