CN213125698U

CN213125698U - Cutting device

Info

Publication number: CN213125698U
Application number: CN202022072283.4U
Authority: CN
Inventors: 龚早京
Original assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Current assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Priority date: 2020-09-19
Filing date: 2020-09-19
Publication date: 2021-05-04
Anticipated expiration: 2030-09-19

Abstract

The utility model relates to a cutting device, which is used for installing a cutting saw blade and comprises a casing, a motor arranged in the casing, a transmission assembly driven by the motor and a shield for accommodating the cutting saw blade, wherein the transmission assembly comprises a transmission case shell, an output shaft arranged in the transmission case shell and a bearing; the output shaft includes from radial outside protruding step portion and the shaft shoulder of stretching of outer peripheral face, and transmission assembly establishes the distance cover in the output shaft periphery including the cover, sets up in dustproof pad and the oil blanket at bearing both ends and sets up the buckler in the guard shield, and dustproof pad is installed between bearing and step portion, and the oil blanket is fixed between distance cover and transmission case shell, and the shaft shoulder is located the guard shield, and the buckler is installed on the shaft shoulder. The utility model can effectively prevent dust and liquid from entering the transmission box body and the bearing, and greatly improve the reliability of the transmission part and the bearing; the oil blanket effectively exists the grease seal in the transmission case, effectively improves drive assembly's life.

Description

Cutting device

[ technical field ] A method for producing a semiconductor device

The utility model relates to a cutting device, in particular to used cutting device of occasions such as fitment or building.

[ background of the invention ]

The cutting device of fluting class rotates through motor drive saw bit to open the wire casing of different width and degree of depth on the working face, the wire casing of opening can be accomplished according to the demand, and pleasing to the eye practical and can not harm the wall body, compare in traditional fluting mode, can effectively alleviate intensity of labour, and be applicable to the work of laying such as old room open wire changes dark line, telephone line, net twine, water and electricity circuit.

Most of slotting type cutting devices in the market at present do not have a waterproof, dustproof and oil-leakage-proof structure, but because the slotting type cutting devices work in a severe environment that dust density is high and water spray cooling is needed during working, dust often invades a shell to cause abnormal sound and accelerated abrasion of a bearing and a gear; cooling water enters the transmission case, so that internal parts are rusted and run unsmoothly; the lubricating grease in the transmission case seeps out of the case body to cause insufficient lubrication of transmission parts, thereby shortening the service life.

Accordingly, there is a need for an improved cutting device 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 simple structure and longe-lived cutting device.

The utility model provides a prior art problem can adopt following technical scheme: a cutting device is used for installing a cutting saw blade and comprises a shell, a motor arranged in the shell, a transmission assembly driven by the motor and a shield for containing the cutting saw blade, wherein the transmission assembly comprises a transmission case shell, an output shaft arranged in the transmission case shell and a bearing for supporting the output shaft; the output shaft includes step portion and the shaft shoulder of stretching from the radial outside protrusion of outer peripheral face, transmission assembly establishes including the cover the distance cover of output shaft periphery, set up in dustproof pad and the oil blanket at bearing both ends and set up in buckler in the guard shield, dustproof pad is installed the bearing with between the step portion, the oil blanket is fixed distance cover with between the transmission case shell, the shaft shoulder is located in the guard shield, the buckler install in on the shaft shoulder.

The further improvement scheme is as follows: the transmission assembly comprises an end cover for accommodating the bearing, and the end cover is fixed on the transmission case shell through screws.

The further improvement scheme is as follows: the transmission housing includes a first step extending radially inward from an inner sidewall and a second step extending radially inward from the first step, the bearing is disposed on the first step, and the oil seal is disposed on the second step.

The further improvement scheme is as follows: one end of the inner ring of the bearing is abutted to the distance sleeve, and the other end of the inner ring of the bearing extrudes the dustproof pad so as to abut the dustproof pad to the first step.

The further improvement scheme is as follows: the waterproof cover comprises a connecting part connected with the shaft shoulder and a waterproof part extending outwards from the connecting part in the radial direction, and the waterproof part is arranged towards the transmission case in an inclined mode.

The further improvement scheme is as follows: the transmission assembly comprises a bearing pressing plate arranged between the shaft shoulder and the cutting saw blade, and the connecting part is fixed between the shaft shoulder and the bearing pressing plate.

The further improvement scheme is as follows: the waterproof cover includes a blade provided on the waterproof portion, the blade being disposed toward the cutting blade.

The further improvement scheme is as follows: the cutting device comprises a holding part and an auxiliary handle, wherein the holding part is connected with the shell, the protective cover is arranged at two ends of the shell, and the auxiliary handle is arranged at one end, close to the protective cover, of the shell.

Compared with the prior art, the utility model discloses following beneficial effect has: the shaft shoulder of the output shaft is provided with the waterproof cover, so that water liquid splashed in the working process is effectively prevented from directly seeping into the transmission case shell, and the service life of the transmission assembly is prolonged; an oil seal is arranged between the distance sleeve and the transmission case shell, so that the grease can be effectively sealed in the transmission case shell, good lubrication is guaranteed, and meanwhile, external dust and liquid are difficult to enter the transmission case shell; and, one end of the dustproof pad is in close contact with the inner ring of the bearing, and the other end of the dustproof pad is in close contact with the step part of the output shaft, so that dust can be effectively prevented from entering the bearing, and the service life of the bearing is prolonged.

[ 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 schematic view of the cutting device of the present invention;

FIG. 2 is a schematic view of another angle of the cutting device shown in FIG. 1;

fig. 3 is an enlarged view of circle a of the cutting device shown in fig. 2.

The meaning of the reference symbols in the figures:

100. cutting device 200, cutting saw blade 1, casing 2, holding portion 3, motor 4, drive assembly 41, transmission case 411, first step 412, second step 42, output shaft 421, step 422, shaft shoulder 43, bearing 44, end cover 441, screw 45, dustproof pad 46, oil blanket 47, buckler 48, distance cover 49, bearing clamp plate 5, guard shield 51, fixed guard shield 52, movable guard shield 6, auxiliary handle

[ detailed description ] embodiments

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

Referring to fig. 1 and 2, an embodiment of the present invention relates to a cutting device 100, and a cutting blade 200 is mounted at an end of the cutting device 100, the cutting device 100 includes a housing 1, a grip 2 and an auxiliary handle 6 connected to the housing 1, a motor 3 mounted in the housing 1, a transmission assembly 4 driven by the motor 3, and a shield 5 accommodating the cutting blade 200. The holding part 2 and the shield 5 are arranged at two ends of the casing 1, the auxiliary handle 6 is arranged at one end of the casing 1 close to the shield 5, and the operator can hold the holding part 2 with one hand and hold the auxiliary handle 6 with the other hand, so that the operator can easily operate and the arms are not easy to fatigue during operation.

Referring to fig. 3, the transmission assembly 4 includes a transmission housing 41, an output shaft 42 installed in the transmission housing 41, a bearing 43 supporting the output shaft 42, an end cover 44 accommodating the bearing 43, a dust-proof pad 45 and an oil seal 46 disposed at two ends of the bearing 43, a waterproof cover 47 disposed in the protective cover 5, and a distance sleeve 48 disposed around the output shaft 42. The output shaft 42 protrudes into the shield 5, the cutting blade 200 is installed on the portion of the output shaft 42 protruding into the shield 5, and the motor 3 drives the transmission assembly 4 and drives the cutting blade 200 to rotate for cutting operation.

In the present embodiment, the shield 5 includes a fixed shield 51 fixedly connected to the cabinet 1 and a movable shield 52 pivotally connected to the fixed shield 51, and the movable shield 52 can be switched between a first position for shielding the cutting blade 200 and a second position for exposing the cutting blade 200; in this second position, the movable guard 52 is housed within the fixed guard 51 and the angle at which the cutting blade 200 is exposed is greater than 270 ° so that the cutting device 100 is able to perform blind-corner-free cutting.

Referring to fig. 3, the output shaft 42 includes a step 421 and a shoulder 422 protruding radially outward from the outer peripheral surface, the shoulder 422 is located in the shield 5, the transmission case 41 includes a first step 411 extending radially inward from the inner side wall and a second step 412 extending radially inward from the first step 411, and the bearing 43 is disposed on the first step 411. Specifically, one end of the outer ring of the bearing 43 abuts against the first step 411, the other end abuts against the end cover 44, and the end cover 44 is fixed to the transmission case 41 through a screw 441, so that the bearing 43 is stable and is not easy to loosen; one end of the inner ring of the bearing 43 abuts against the distance sleeve 48, and the other end abuts against the dustproof pad 45, so that the dustproof pad 45 is pressed against the step portion 421, and thus, one end of the dustproof pad 45 is in close contact with the inner ring of the bearing 43, and the other end of the dustproof pad is in close contact with the step portion 421 of the output shaft 42, so that dust can be effectively prevented from entering the bearing 43, and the service life of the bearing 43 is prolonged.

In the present embodiment, the above-described oil seal 46 is seated on the second step 412, specifically, the outer peripheral side of the oil seal 46 abuts against the second step 412, and the inner peripheral side abuts against the distance sleeve 48; and one end of the oil seal 46 abuts against the second step 412 and the other end abuts against the inner race of the bearing 43. An oil seal 46 is arranged between the distance sleeve 48 and the transmission case 41, so that grease can be effectively sealed in the transmission case 41, good lubrication is guaranteed, and meanwhile, external dust and liquid are difficult to enter the transmission case 41.

Referring to fig. 3 again, the waterproof cover 47 includes a connecting portion 471 connected to the shoulder 422 and a waterproof portion 472 extending radially outward from the connecting portion 471, the waterproof portion 472 being inclined toward the transmission case 41; the driving assembly 4 includes a bearing pressing plate 49 disposed between the shoulder 422 and the cutting blade 200, and the coupling portion 471 is fixed between the shoulder 422 and the bearing pressing plate 49. By installing the waterproof cover 47 on the shaft shoulder 422 of the output shaft 42, the water splashed during the work can be effectively prevented from directly seeping into the transmission case shell 41, and the service life of the transmission assembly 4 is prolonged.

Preferably, the waterproof cover 47 includes a blade provided on the waterproof portion 472, the blade being disposed toward the cutting blade 200 to further improve the waterproof performance of the waterproof cover 47.

The utility model effectively prevents water splashed during working from directly seeping into the transmission case shell 41 by installing the waterproof cover 47 on the shaft shoulder 422 of the output shaft 42, and prolongs the service life of the transmission component 4; an oil seal 46 is arranged between the distance sleeve 48 and the transmission case 41, so that grease can be effectively sealed in the transmission case 41, good lubrication is guaranteed, and meanwhile, external dust and liquid are difficult to enter the transmission case 41; in addition, one end of the dustproof pad 45 is in close contact with the inner ring of the bearing 43, and the other end of the dustproof pad is in close contact with the step 421 of the output shaft 42, so that dust can be effectively prevented from entering the bearing 43, and the service life of the bearing 43 is prolonged.

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 cutting device of the present invention may be devised 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

1. A cutting device is used for installing a cutting saw blade and comprises a shell, a motor arranged in the shell, a transmission assembly driven by the motor and a shield for containing the cutting saw blade, wherein the transmission assembly comprises a transmission case shell, an output shaft arranged in the transmission case shell and a bearing for supporting the output shaft; the method is characterized in that: the output shaft includes step portion and the shaft shoulder of stretching from the radial outside protrusion of outer peripheral face, transmission assembly establishes including the cover the distance cover of output shaft periphery, set up in dustproof pad and the oil blanket at bearing both ends and set up in buckler in the guard shield, dustproof pad is installed the bearing with between the step portion, the oil blanket is fixed distance cover with between the transmission case shell, the shaft shoulder is located in the guard shield, the buckler install in on the shaft shoulder.

2. The cutting device of claim 1, wherein: the transmission assembly comprises an end cover for accommodating the bearing, and the end cover is fixed on the transmission case shell through screws.

3. The cutting device of claim 2, wherein: the transmission housing includes a first step extending radially inward from an inner sidewall and a second step extending radially inward from the first step, the bearing is disposed on the first step, and the oil seal is disposed on the second step.

4. The cutting device of claim 3, wherein: one end of the inner ring of the bearing is abutted to the distance sleeve, and the other end of the inner ring of the bearing extrudes the dustproof pad so as to abut the dustproof pad to the first step.

5. The cutting device of claim 1, wherein: the waterproof cover comprises a connecting part connected with the shaft shoulder and a waterproof part extending outwards from the connecting part in the radial direction, and the waterproof part is arranged towards the transmission case in an inclined mode.

6. The cutting device of claim 5, wherein: the transmission assembly comprises a bearing pressing plate arranged between the shaft shoulder and the cutting saw blade, and the connecting part is fixed between the shaft shoulder and the bearing pressing plate.

7. The cutting device of claim 6, wherein: the waterproof cover includes a blade provided on the waterproof portion, the blade being disposed toward the cutting blade.

8. The cutting device of claim 1, wherein: the cutting device comprises a holding part and an auxiliary handle, wherein the holding part is connected with the shell, the protective cover is arranged at two ends of the shell, and the auxiliary handle is arranged at one end, close to the protective cover, of the shell.