CN217683172U - Electric tool - Google Patents

Abstract

The utility model relates to an electric tool, including the casing, accept motor element and drive assembly in the casing and connect in drive assembly's reciprocal subassembly, motor element drives drive assembly, drives reciprocal subassembly and is reciprocating motion. The electric tool further comprises a sealing assembly sleeved on the reciprocating assembly, the sealing assembly is provided with a sealing body arranged on the machine shell, and a first gasket, a second gasket and an elastic piece which are arranged in the sealing body, and the elastic piece enables the first gasket and the second gasket to be abutted against the sealing body. The utility model discloses a first gasket of elastic component biasing and second gasket make first gasket and second gasket paste and lean on in the portion of acceping inner wall, have solved the too big problem of fit-up gap, and sealed effectual, and the reliability is high.

Description

Electric tool

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electric tool, in particular to an electric tool for decoration, building and other occasions.

[ background of the invention ]

The curve saw is a reciprocating tool for cutting wood, plastic and other materials, and is widely applied to the fields of furniture decoration and the like. When a workpiece is processed, the transmission assembly of the jig saw converts the rotary motion of the motor assembly into the reciprocating motion of the reciprocating rod and drives the saw blade to move along a determined track curve so as to process the preset workpiece profile. The reciprocating rod is arranged in the gear box cover, and an elastic gasket is arranged between the reciprocating rod and the gear box cover for sealing so as to prevent grease from flowing out. However, in the prior art, the elastic gasket is directly clamped on the gear box cover, so that a large assembly gap exists between the reciprocating rod and the elastic gasket and between the elastic gasket and the gear box cover, and the sealing effect is poor; meanwhile, the direct exposure of the elastic gasket easily causes the aggravation of abrasion.

In order to improve the above structure, european patent No. EP0152621A1, published on 28.08.1985, discloses a curve saw, which comprises a reciprocating rod, a sealing member surrounding the reciprocating rod and a steel disc fixing the sealing member, wherein the sealing member comprises a two-part hollow body and a sealing felt enclosed in the hollow body. According to the technical scheme, the sealing felt is contained in the hollow body, so that the sealing piece is prevented from contacting with the scroll saw shell, but no matching structure exists between the hollow body and the shell, and the assembly gap between the hollow body and the shell is large, so that grease leakage is caused; meanwhile, the hollow body is a two-part mounting sealing felt, and the sealing effect is unreliable.

Accordingly, there is a need for an improved power tool that overcomes the deficiencies of the prior art.

[ Utility model ] content

To the not enough of prior art, the utility model aims to provide a sealed effectual and simple structure's electric tool.

The utility model provides a prior art problem can adopt following technical scheme: an electric tool comprises a machine shell, a motor assembly and a transmission assembly which are accommodated in the machine shell, and a reciprocating assembly connected with the transmission assembly, wherein the motor assembly drives the transmission assembly to drive the reciprocating assembly to reciprocate; the electric tool further comprises a sealing assembly sleeved on the reciprocating assembly, the sealing assembly is provided with a sealing body arranged on the machine shell, and a first gasket, a second gasket and an elastic piece which are arranged in the sealing body, and the elastic piece enables the first gasket and the second gasket to be abutted to the sealing body.

The further improvement scheme is as follows: the reciprocating assembly comprises a connecting piece connected with the transmission assembly and a reciprocating rod fixed on the connecting piece, the sealing assembly is sleeved on the periphery of the reciprocating rod, and the elastic piece is attached to the periphery of the reciprocating rod.

The further improvement scheme is as follows: the sealing body is provided with a hollow accommodating part and an opening penetrating through the side face of the accommodating part, and the first gasket, the second gasket and the elastic piece are installed in the accommodating part from the opening.

The further improvement scheme is as follows: the casing has a gear box cover for accommodating the reciprocating component, and the sealing body is installed in the gear box cover.

The further improvement scheme is as follows: the sealing body is provided with a first step part protruding downwards from the bottom surface of the accommodating part, the gear box cover is provided with a bearing part for supporting the accommodating part and a second step part protruding upwards from the bearing part, and the second step part abuts against the first step part.

The further improvement scheme is as follows: the difference between the inner diameter of the second gasket and the diameter of the reciprocating rod is more than or equal to 0.1mm and less than or equal to 0.15mm.

The further improvement scheme is as follows: the gear box cover is provided with a first positioning rib protruding from the inner wall, and the accommodating part abuts against the first positioning rib.

The further improvement scheme is as follows: the power tool includes a latch connected to the housing, the latch securing the seal assembly to the gearbox cover.

The further improvement scheme is as follows: the gear box cover is provided with a second positioning rib protruding from the inner wall, and the second positioning rib only abuts against the first gasket.

The further improvement scheme is as follows: the two first gaskets and the two second gaskets are symmetrically distributed on two sides of the sealing body respectively.

Compared with the prior art, the utility model discloses following beneficial effect has: the first gasket, the second gasket and the elastic piece are installed in the sealing body to form a complete sealing assembly, so that the structure is simple, and the installation is convenient. In addition, the first step portion of seal supports and leans on in the second step portion of gear case lid, and simultaneously, first gasket of elastic component biasing and second gasket make first gasket and second gasket paste and lean on in the portion of acceping the inner wall, have solved the too big problem of fit-up gap, and sealed effectual, and the reliability is high.

[ description of the drawings ]

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:

fig. 1 is a cross-sectional view of a power tool according to a preferred embodiment of the present invention;

FIG. 2 is a disassembled schematic view of the main body portion of the power tool of FIG. 1;

FIG. 3 is a disassembled schematic view of the components within the gearbox cover of the power tool of FIG. 1;

FIG. 4 is a schematic view of the reciprocating assembly shown in FIG. 3;

FIG. 5 is a top view of the shuttle assembly shown in FIG. 4;

FIG. 6 is a schematic view of the construction of the carriage in the reciprocating assembly of FIG. 4;

FIG. 7 is an assembled schematic view of the seal assembly shown in FIG. 3;

FIG. 8 is a cross-sectional view of the gearbox cover shown in FIG. 3;

fig. 9 is an enlarged partial view of the seal assembly shown in fig. 8.

[ detailed description ] A

The present invention will be described in further detail with reference to the accompanying drawings and embodiments.

The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Words such as "upper", "lower", "front", "rear", "left", "right", etc., indicating directions or positional relationships described below are based only on directions or positional relationships shown in the drawings, are only for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the devices/elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1, an embodiment of the present invention relates to an electric tool, and more particularly, to a reciprocating cutting tool used in decoration and construction fields. The electric tool 100 comprises a machine shell 1, a motor component 2 and a transmission component 3 which are contained in the machine shell 1, a reciprocating component 4 connected with the transmission component 3, a clamping mechanism 5 for connecting a saw blade to the reciprocating component 4, a base 6 fixed at the lower end of the machine shell 1 and an electric control component 7 for controlling the motor component 2. The motor component 2 drives the transmission component 3 to drive the reciprocating component 4 and the saw blade to do reciprocating motion, so that the workpiece is cut.

As shown in fig. 2, the casing 1 includes a first half shell 11 and a second half shell 12 that are substantially symmetrical, a gear housing 13 mounted between the first half shell 11 and the second half shell 12, and a gear housing cover 14 fixed to the gear housing 13. The gearbox casing 13 is clamped between the first half shell 11 and the second half shell 12, the gearbox cover 14 is fixed to the gearbox casing 13 through screws, and the first half shell 11 and the second half shell 12 are locked through common screws, so that the assembly is simple and the reliability is high.

Specifically, the first and second half shells 11 and 12 enclose a body portion having a motor housing 101 extending in a longitudinal direction, a head housing 102 at a front end of the motor housing 101, a battery connecting portion 103 at a rear end of the motor housing 101, and a handle portion 104 connected between the head housing 102 and the battery connecting portion 103. A through hole is formed between the handle portion 104 and the motor housing 101, so that an operator can conveniently grip the handle portion 104 or the motor housing 101 for processing.

In the present embodiment, the motor assembly 2 is mounted in the motor housing 101, and the motor shaft 21 thereof longitudinally protrudes out of the front end surface of the gear housing 13.

In the present embodiment, the transmission assembly 3 is accommodated in the head housing 102, and includes a transmission gear 31 fixed to the gear housing 13, a crank pin 32 attached to the transmission gear 31, and a weight 33 located between the transmission gear 31 and the gear housing 13. The transmission gear 31 has a cylindrical transmission body 311 with helical teeth distributed on the outer periphery, a through hole 312 longitudinally penetrating the transmission body 311, and an eccentric block 313 longitudinally protruding from the rear end face of the transmission body 311, wherein the through hole 312 and the eccentric block 313 are located on both sides of the center of the transmission body 311, and the three are located on the same straight line. The crank pin 32 has one end press-fitted into the through hole 312 and the other end connected to the reciprocating assembly 4. The eccentric mass 313 is fitted into the elliptical hole of the balance weight 33 to move the balance weight 33 up and down. The small bevel gear 211 at the front end of the motor shaft 21 engages with the transmission gear 31 to drive the balance weight 33 and the reciprocating component 4 to reciprocate in opposite directions.

As shown in fig. 3 and 4, the reciprocating assembly 4 is located at the front end of the transmission assembly 3 and is mounted in the gear box cover 14. The reciprocating assembly 4 includes a link 41 connected to the transmission assembly 3, a reciprocating rod 42 fixed in the link 41, a guide member 43 guiding the reciprocating rod 42, a rolling body 44 movably connected between the link 41 and the guide member 43, and an elastic member 45 installed on the gear case cover, wherein the rolling body 44 prevents the guide member 43 from directly contacting the link 41. The elastic member 45 biases the guide piece 43 toward the link 41 so that the guide piece 43 abuts against the rolling body 44, thereby guiding the reciprocating lever 42.

In the present embodiment, the link 41 includes a reciprocating member 411 to which the actuator unit 3 is connected and a cover member 412 fixed to the reciprocating member 411, and the reciprocating member 411 and the cover member 412 are fixedly connected by screws. Specifically, the reciprocating member 411 has a receiving groove 4111 recessed inward from the front end surface and a U-shaped reciprocating groove 4112, and the receiving groove 4111 and the reciprocating groove 4112 are located on the opposite side. The crank pin 32 is installed in the reciprocating groove 4112 to reciprocate the reciprocating rod 42 up and down through the connecting member 41.

In the present embodiment, the reciprocating lever 42 is disposed substantially perpendicular to the motor shaft 21. The reciprocating rod 42 is provided with a flat position, and the flat position is attached to the front end surface of the reciprocating component 411 so as to fix the reciprocating rod 42 between the reciprocating component 411 and the cover component 412 and further prevent the reciprocating rod 42 from moving in the connecting piece 41.

Referring to fig. 4, the guide member 43 includes a bracket 431 received in the gearbox cover 14, a rotating shaft 432 penetrating the bracket 431, and a guide pin 433 mounted on the bracket 431, wherein the rotating shaft 432 fixes the guide member 43 to the gearbox cover 14.

Specifically, the bracket 431 has a bracket body 4311, a pin hole 4312 and a reciprocation hole 4313 axially penetrating the bracket body 4311, a support wall 4314 outwardly protruding from the bracket body 4311, and a second mounting hole 4315 penetrating the support wall 4314, the gear box cover 14 has a first mounting hole 141 penetrating a side wall, and the guide pin 433 passes through the first and second mounting holes 141 and 4315 to rotatably mount the bracket 431 in the gear box cover 14.

Referring to fig. 5, the reciprocating rod 42 is installed in the reciprocating hole 4313, the guide pin 433 is installed in the pin hole 4312, and the guide pin 433 is located at the front end of the reciprocating rod 42 and is substantially parallel to the reciprocating rod 42. The guide pins 433 are disposed at both sides of the reciprocating rod 42 for guiding the reciprocating motion of the reciprocating rod 42. The guide pin 433 has one side abutting against the elastic element 45 and the other side abutting against the rolling body 44. The elastic member 45 biases the guide pin 433 toward the rolling body 44 to prevent the guide pin 433 from deviating.

In the present embodiment, the rolling elements 44 are accommodated in the accommodating grooves 4111 and protrude out of the front end surface of the reciprocating member 411, so that the guide pin 433 is only in point contact with the rolling elements 44, the friction between the two is greatly reduced, and the service life of the parts is prolonged.

Referring to fig. 3 and 8, the electric power tool 100 further includes a sealing assembly 8 disposed around the reciprocating rod 42 and a locking member 9 for fixing the sealing assembly 8, the sealing assembly 8 includes a sealing body 81 mounted on the gear box cover 14, and a first gasket 82, a second gasket 83 and an elastic member 84 mounted in the sealing body 81, and the elastic member 84 axially abuts the first gasket 82 and the second gasket 83 against an inner wall of the sealing body 81. Preferably, the two first gaskets 82 and the two second gaskets 83 are symmetrically distributed on two sides of the sealing body 81. The first gasket 82, the second gasket 83 and the elastic member 84 are press-fitted and then inserted into the sealing body 81 to form a complete sealing assembly 8, which is easy to install.

As shown in fig. 7, the sealing body 81 includes a hollow housing 811, an opening 812 penetrating through a side surface of the housing 811, a slot 815 axially penetrating through the housing 811, a first step 813 protruding from a lower end surface of the housing 811, and a locking wing 814 protruding outward from the first step 813. Opening 812 communicates with slot 815, and first pad 82, second pad 83, and spring 84 are installed into receptacle 811 from opening 812 with their bores aligned with slot 815.

In the present embodiment, the gear box cover 14 includes a receiving portion 144 for supporting the housing portion 811, a second stepped portion 145 projecting upward from the receiving portion 144, and a first positioning rib 142 and a second positioning rib 143 projecting from an inner wall of the gear box cover 14. The front end of the housing portion 811 abuts against the first positioning rib 412, and the first stepped portion 813 abuts against the second stepped portion 145, so that grease is prevented from flowing out downward from the fitting gap between the seal body 81 and the gear case cover 14.

As shown in fig. 8, the first washer 82 has an inner diameter larger than the diameter of the reciprocating lever 42 and abuts against the second positioning rib 143 to prevent the first washer 82 from moving up and down. The outer diameter of the second washer 83 is smaller than the outer diameter of the first washer 82, and the inner diameter of the second washer 83 is larger than the diameter of the reciprocating rod 42. Preferably, the difference between the inner diameter of the second gasket and the diameter of the reciprocating rod is 0.1mm or more and 0.15mm or less. The elastic member 84 is attached to the outer periphery of the reciprocating lever 42, and the elastic member 84 is in a pressed state, which biases the first and second spacers 82 and 83 toward the inner wall of the housing 811 to prevent grease from flowing into the sealing body 81.

Referring again to fig. 6, the locking member 9 has a locking plate 91, and a screw 92 is threadedly coupled to a screw hole 146 formed in the gear case cover 14 to lock the seal assembly 8 between the locking plate 91 and the gear case cover 14, thereby preventing the seal assembly 8 from being moved, resulting in poor sealing.

Referring to fig. 1, the base 6 is a substantially rectangular plate-shaped structure and has a flat bottom surface, the bottom surface abuts against the processed surface of the workpiece during the cutting operation, and the saw blade protrudes out of the lower surface of the base 6 to process the workpiece.

In this embodiment, the electric control assembly 7 includes a control board located between the battery insertion part 103 and the motor housing 101 and electrically connected to the motor assembly 2, a speed-adjusting knob located above the electric control board, and a switch in the mounting handle part 104, the speed-adjusting knob and the switch being electrically connected to the control board to control the start, stop and rotation speed of the motor assembly 2.

The utility model discloses an install first gasket 82, second gasket 83 and elastic component 84 to sealing 81 in to form a complete seal assembly 8, simple structure, the installation of being convenient for. In addition, the first step 813 of the sealing body 81 abuts against the second step 145 of the gear case cover 14, and meanwhile, the elastic member 84 biases the first gasket 82 and the second gasket 83, so that the first gasket 82 and the second gasket 83 abut against the inner wall of the accommodating portion 811, the problem of overlarge assembly gap is solved, the sealing effect is good, and the reliability is high.

The present invention is not limited to the above-described embodiments. It will be readily appreciated by those skilled in the art that many other alternatives to the power tool may be made without departing from the spirit and scope of the invention. The protection scope of the present invention is subject to the content of the claims.

Claims (10)

1. An electric tool comprises a machine shell, a motor assembly and a transmission assembly which are accommodated in the machine shell, and a reciprocating assembly connected with the transmission assembly, wherein the motor assembly drives the transmission assembly to drive the reciprocating assembly to reciprocate; the method is characterized in that: the electric tool further comprises a sealing assembly sleeved on the reciprocating assembly, the sealing assembly is provided with a sealing body arranged on the machine shell, and a first gasket, a second gasket and an elastic piece which are arranged in the sealing body, and the elastic piece enables the first gasket and the second gasket to be abutted to the sealing body.

2. The power tool of claim 1, wherein: the reciprocating assembly comprises a connecting piece connected with the transmission assembly and a reciprocating rod fixed on the connecting piece, the sealing assembly is sleeved on the periphery of the reciprocating rod, and the elastic piece is attached to the periphery of the reciprocating rod.

3. The power tool of claim 2, wherein: the sealing body is provided with a hollow accommodating part and an opening penetrating through the side face of the accommodating part, and the first gasket, the second gasket and the elastic piece are installed in the accommodating part from the opening.

4. The power tool of claim 3, wherein: the casing is provided with a gear box cover for accommodating the reciprocating assembly, and the sealing body is installed in the gear box cover.

5. The power tool of claim 4, wherein: the sealing body is provided with a first step part which protrudes downwards from the bottom surface of the accommodating part, the gear box cover is provided with a bearing part for supporting the accommodating part and a second step part which protrudes upwards from the end surface of the bearing part, and the second step part is abutted against the first step part.

6. The power tool of claim 2, wherein: the difference between the inner diameter of the second gasket and the diameter of the reciprocating rod is more than or equal to 0.1mm and less than or equal to 0.15mm.

7. The power tool of claim 4, wherein: the gear box cover is provided with a first positioning rib protruding from the inner wall, and the accommodating part abuts against the first positioning rib.

8. The power tool of claim 4, wherein: the power tool includes a latch connected to the housing, the latch securing the seal assembly to the gearbox cover.

9. The power tool of claim 4, wherein: the gear box cover is provided with a second positioning rib protruding from the inner wall, and the second positioning rib only abuts against the first gasket.

10. The power tool of claim 1, wherein: the two first gaskets and the two second gaskets are symmetrically distributed on two sides of the sealing body respectively.

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