CN216802916U

CN216802916U - Hand-held sander

Info

Publication number: CN216802916U
Application number: CN202220298610.4U
Authority: CN
Inventors: 鲁正国
Original assignee: Shanghai Dingdong Technology Co ltd
Current assignee: Shanghai Dingdong Technology Co ltd
Priority date: 2022-02-15
Filing date: 2022-02-15
Publication date: 2022-06-24
Anticipated expiration: 2032-02-15

Abstract

The utility model relates to a sander, in particular to a handheld sander. The utility model provides a hand-held type grinder, its characterized in that includes the casing, the casing is formed with handheld portion, be equipped with driving motor in the casing, driving motor's output department is equipped with the fixed block, the casing is equipped with the opening, the fixed block is located the opening part, the fixed block comprises interior fixed block and outer fixed block, interior fixed block and the coaxial mutual cover of outer fixed block are established, interior fixed block and outer fixed block are in synchronous rotation under driving motor's the effect. The utility model has the advantages of convenient hand-holding and compact structure. The handheld sander can be used in multiple functions. The utility model can avoid the tendency of the sander to rotate to one side when in use, can improve the hand-holding comfort of a user and has the advantage of convenient use for the user.

Description

Hand-held sander

Technical Field

The utility model relates to a sander, in particular to a handheld sander.

Background

Chinese patent No. 201820809228.9 discloses a sanding machine, which comprises a grinding head, wherein the bottom surface of the grinding head is used for fixing abrasive paper, the grinding head is fixed with a rotating wheel, and the rotating wheel is linked with an output shaft of a motor through a belt.

The prior sander has the following defects: only one grinding head is provided, only one grinding mode can be carried out during use, and coarse grinding and fine grinding cannot be simultaneously realized.

Disclosure of Invention

The utility model aims to provide a handheld sander capable of simultaneously performing coarse grinding and fine grinding.

In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides a hand-held type grinder, includes the casing, the casing is formed with handheld portion, be equipped with driving motor in the casing, driving motor's output department is equipped with the fixed block, the casing is equipped with the opening, the fixed block is located the opening part, the fixed block comprises interior fixed block and outer fixed block, interior fixed block and the coaxial mutual cover of outer fixed block are established, interior fixed block and outer fixed block are in synchronous rotation under driving motor's the effect.

The utility model is provided with the inner fixing block and the outer fixing block which are mutually sleeved, the inner fixing block and the outer fixing block can synchronously rotate under the action of the driving motor, the surfaces of the inner fixing block and the outer fixing block can fix abrasive paper with fixed meshes, and the rotating speed of the inner fixing block can be different from that of the outer fixing block, so that different functions can be realized through the same hand-held sander, coarse grinding and fine grinding can be simultaneously realized, and high-speed grinding and low-speed grinding can also be simultaneously carried out, so that the hand-held sander can be used in multiple functions. The handheld part is arranged to facilitate the handheld of the sander, so that the corners or the protruded parts of the wood are conveniently sanded.

Preferably, the width of the end of the shell deviating from the opening is smaller than the width of the end of the shell with the opening, the end of the shell deviating from the opening is the handheld portion, and the two opposite sides of the handheld portion are provided with the finger grooves. One end of the shell is wide, the other end of the shell is thin, the finger grooves are formed in the two sides of the shell, a user can conveniently hold the shell by the aid of the finger grooves, and meanwhile, the shell does not need to be provided with handles or penetrating grooves, so that the shell can be more compact in structure.

Preferably, the shell is fixed with two ends of a fixing band, and a clamping groove is formed between the fixing band and the outer wall of the handheld part of the shell. The palm of the user is fixed through the fixing belt, so that the sanding machine is prevented from being separated from the palm of the user, and the hand of the user can be conveniently held. Wherein, the fixing band can adopt an elastic band.

Preferably, the rotation direction of the inner fixing block is opposite to that of the outer fixing block. When interior fixed block and outer fixed block direction of rotation are the same, whole grinder has the tendency power of rotating to one side, and the relative user palm of grinder casing body can take place to remove, can take place the friction between casing and palm, can influence user's the angle of gripping and position to reduce user's comfort level.

Preferably, an inner gear ring structure is arranged at the inner fixing block, an outer gear ring structure is arranged at the outer fixing block, the inner gear ring structure is located on the inner side of the outer gear ring structure, a linkage gear is matched between the inner gear ring structure and the outer gear ring structure, and the linkage gear is rotationally fixed in the shell by taking the axis of the linkage gear as the center. When the output shaft of the driving motor rotates, the linkage gear rotates, and the inner fixed block and the outer fixed block rotate synchronously because the inner gear ring structure and the outer gear ring structure are both meshed with the linkage gear. The utility model can realize the rotation of the inner fixed block and the outer fixed block through one linkage gear, has simpler structure and can ensure that the internal structure of the shell of the utility model is more compact.

Preferably, an outer gear ring structure is arranged at the outer fixing block, a linkage gear is matched with the inner side of the outer gear ring structure, and the linkage gear autorotates under the action of a driving motor and drives the outer fixing block to rotate. The inner fixing block can be linked with the driving motor in other modes, for example, the inner fixing block is directly fixed with an output shaft of the driving motor, and the linkage gear is linked with the output shaft of the driving motor in a gear transmission mode or a belt transmission mode.

Preferably, the outer fixed block is provided with a first limiting protrusion extending towards the circumferential inner side, the inner fixed block is provided with a second limiting protrusion located at the axial side of the first limiting protrusion, and the first limiting protrusion is closer to the driving motor than the second limiting protrusion. Through the cooperation of the first limiting bulge and the second limiting bulge, the outer fixing block is prevented from axially moving relative to the inner fixing block, and the outer fixing block is prevented from being separated from the shell. Wherein, the inner fixed block can adopt the existing conventional structure to be fixed with the shell and the driving motor.

Preferably, an annular abdicating groove is formed in the circumferential outer wall of the inner fixed block, the abdicating groove is close to the end face of the inner fixed block, and the first limiting protrusion extends into the abdicating groove; the inner end opening of the first limiting bulge is of an open structure. The inner fixing block forms a yielding groove, so that the movement of the outer fixing block is further limited. Wherein, the first spacing arch that outer fixed block can adopt the mode of deformation card cooperation to stretch into the inslot of stepping down, and first spacing arch can be made by rubber, plastics or have certain elastic metal promptly. Wherein, also can set up outer fixed block into two parts of piecing together to make first spacing arch can stretch into the inslot of stepping down. The openings at the inner ends of the first limiting bulges form an open structure, so that the first limiting bulges are deformed and clamped into the abdicating groove, and the inner ends of the first limiting bulges are the ends far away from the outer fixing blocks and used for fixing the abrasive paper side.

Preferably, the outer gear ring structure and the outer fixing block are detachably fixed. The reduction ratio between the outer fixing block and the linkage gear can be adjusted by replacing the outer gear ring structure, so that different rotating speeds between the inner fixing block and the outer fixing block can be realized.

Preferably, the inner gear ring structure and the inner fixing block are detachably fixed. The reduction ratio between the inner fixing block and the linkage gear can be adjusted by replacing the inner gear ring structure, so that different rotating speeds between the inner fixing block and the outer fixing block are realized.

The utility model has the advantages of convenient hand-holding and compact structure. The fixing block of the hand-held sanding machine is composed of an inner fixing block and an outer fixing block, abrasive paper with different meshes can be fixed at the positions of the inner fixing block and the outer fixing block, coarse grinding and fine grinding can be simultaneously realized, and high-speed grinding and low-speed grinding can be simultaneously realized, so that the hand-held sanding machine can be used in a multifunctional mode. And the rotatable opposite direction of outer fixed block and interior fixed block can avoid the grinder to have when using to one side pivoted trend power, can improve the handheld comfort level of user, has the advantage that the convenient to use user used.

Drawings

FIG. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of the linkage between the driving motor and the fixing block according to embodiment 1;

fig. 3 is a schematic structural diagram of the linkage between the driving motor and the fixing block in embodiment 2.

Detailed Description

The utility model is further described below with reference to the figures and specific embodiments.

Example 1

As shown in fig. 1, the hand-held sander of the present invention comprises a housing 1, wherein the housing is formed with a hand-held portion 11, a driving motor 2 is arranged in the housing 1, a fixing block is arranged at an output end of the driving motor 2, the housing 1 is provided with an opening, the fixing block is composed of an inner fixing block 3 and an outer fixing block 4, a rotation direction of the inner fixing block 3 of the embodiment is opposite to a rotation direction of the outer fixing block 4, the inner fixing block 3 and the outer fixing block 4 are coaxial and are sleeved with each other, and the inner fixing block 3 and the outer fixing block 4 synchronously rotate under the action of the driving motor 2. Wherein, the fixed block is located the opening part, and the fixed block keeps away from driving motor 2's terminal surface and is located the casing 1 outside, and the terminal surface that interior fixed block 3 and outer fixed block 4 are used for fixed abrasive paper promptly all is located the open-ended outside of casing 1.

The width of the end of the shell 1 deviating from the opening is smaller than that of the end of the shell 1 with the opening, and the end of the shell 1 deviating from the opening is the handheld part 11. The shell 1 is fixed with two ends of the fixing belt 12, and a clamping groove is formed between the fixing belt 12 and the outer wall of the handheld part of the shell 1. Wherein, the hand-held portion 11 is provided with finger grooves 111 at two opposite side walls for the user to grasp.

As shown in fig. 2, the housing 1 is rotatably fixed to the fixing shaft 14 through the first bearing 13, the outer end of the fixing shaft 14 is coaxially fixed to the inner fixing block 3, and the fixing structure between the inner fixing block 3 and the fixing shaft 14 in this embodiment may be any fixing structure between a transmission shaft and a fixing block of an existing sander. Outer fixed block 4 is equipped with the first spacing arch 41 that extends to the inside week, interior fixed block 3 has the spacing arch 31 of annular second and the spacing arch 32 of third, the spacing arch 31 of second is close to the terminal surface that interior fixed block 3 is used for fixed abrasive paper than the spacing arch 32 of third, it has the annular groove of stepping down to constitute between the spacing arch 31 of second and the spacing arch 32 of third, first spacing arch 41 stretches into the inslot of stepping down, and the inner opening of first spacing arch 41 is uncovered shape structure, first spacing arch 41 is more close to driving motor 2 than the spacing arch 31 of second.

An outer gear ring structure 5 is arranged at the position of the outer fixing block 4, a linkage gear 6 is matched with the inner side of the outer gear ring structure 5, and the linkage gear 6 autorotates under the action of the driving motor 2 and drives the outer fixing block 4 to rotate. The output shaft 21 of the driving motor 2 is linked with the fixed shaft 14 through belt transmission or gear transmission.

Example 2

As shown in fig. 3, the present embodiment is different from embodiment 2 in that: besides the outer gear ring structure 5 arranged on the outer fixed block 4, the inner fixed block 3 is also provided with an inner gear ring structure 30, the inner gear ring structure 30 is positioned at the inner side of the outer gear ring structure 5, the linkage gear 6 is simultaneously meshed with the inner gear ring structure 30 and the outer gear ring structure 5, and the linkage gear 6 is fixed on the output shaft 21 of the driving motor 2; the first stopper protrusion 41 is located between the second stopper protrusion 31 and the ring gear structure 30. The outer gear ring structure 5 is detachably fixed with the outer fixing block 4 through screws, and the inner gear ring structure 30 is detachably fixed with the inner fixing block 3 through screws.

The linkage gear 6 can be made into a step gear type, namely, the linkage gear has two sections of tooth structures, one section of tooth structure is used for being meshed with the inner gear ring structure, and the other section of tooth structure is used for being meshed with the outer gear ring structure.

Claims

1. The utility model provides a hand-held type grinder, its characterized in that includes the casing, the casing is formed with handheld portion, be equipped with driving motor in the casing, driving motor's output department is equipped with the fixed block, the casing is equipped with the opening, the fixed block is located the opening part, the fixed block comprises interior fixed block and outer fixed block, interior fixed block and the coaxial mutual cover of outer fixed block are established, interior fixed block and outer fixed block are in synchronous rotation under driving motor's the effect.

2. The hand-held sander as set forth in claim 1, wherein the width of the housing at the end offset from the opening is smaller than the width of the end of the housing having the opening, said end of the housing offset from the opening being said hand-held portion, said hand-held portion having finger grooves on opposite sides.

3. The hand-held sander according to claim 1 or 2, wherein the housing is fixed to both ends of a fixing band, and a clamping groove is formed between the fixing band and the outer wall of the hand-held portion of the housing.

4. The hand-held sander of claim 1, wherein the direction of rotation of the inner holding block is opposite to the direction of rotation of the outer holding block.

5. The handheld sander as set forth in claim 1 or 4, wherein the inner fixing block is provided with an inner gear ring structure, the outer fixing block is provided with an outer gear ring structure, the inner gear ring structure is located inside the outer gear ring structure, and a linkage gear is fitted between the inner gear ring structure and the outer gear ring structure, and the linkage gear is rotationally fixed in the housing by taking the axis of the linkage gear as the center.

6. The handheld sander as set forth in claim 1 or 4, wherein an outer gear ring structure is arranged at the outer fixing block, a linkage gear is fitted inside the outer gear ring structure, and the linkage gear rotates under the action of a driving motor and drives the outer fixing block to rotate.

7. The hand-held sander as set forth in claim 1, wherein the outer fixing block is provided with a first limiting protrusion extending to the circumferential inner side, the inner fixing block is provided with a second limiting protrusion located at the axial side of the first limiting protrusion, and the first limiting protrusion is closer to the driving motor than the second limiting protrusion.

8. The hand-held sander according to claim 7, wherein an annular abdicating groove is arranged at the circumferential outer wall of the inner fixed block, the abdicating groove is close to the end face of the inner fixed block, and the first limiting protrusion extends into the abdicating groove; the inner end opening of the first limiting bulge is of an open structure.

9. The hand held sander of claim 5, wherein said outer ring gear structure is removably secured to the outer fixture block.

10. The hand-held sanding machine as defined in claim 5, wherein the ring gear structure is removably secured to the inner mount block.