CN107030574B

CN107030574B - Sanding machine

Info

Publication number: CN107030574B
Application number: CN201610490699.3A
Authority: CN
Inventors: 陈治国; 马晓东; 韩冰
Original assignee: Nanjing Chervon Industry Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2016-02-04
Filing date: 2016-06-28
Publication date: 2024-01-19
Anticipated expiration: 2036-06-28
Also published as: CN205852468U; CN107030574A

Abstract

The invention discloses a sander and a support member suitable for the sander, wherein the sander comprises: the motor comprises a bottom plate, a motor, a shell and a supporting piece; the base plate is used for mounting sand paper, the motor is used for driving the base plate to swing, the shell is used for accommodating the motor, and the supporting piece is arranged between the shell and the base plate; wherein, support includes: a top seat, a base and supporting legs; the footstock is used for connecting the shell, and the base is used for connecting the bottom plate, and the supporting legs vertically supports between footstock and base and includes the crooked section that transversely bends and form. The support in the sander can also prolong the service life of the support while the longitudinal size is reduced.

Description

Sanding machine

Technical Field

The invention relates to a sander, in particular to a support piece of the sander.

Background

In the field of power tools, sanders are a commonly used type of power tool that is commonly used to smooth the surface of a woodworking article. The sander mainly comprises a motor, a transmission assembly and a bottom plate, wherein the transmission assembly comprises an eccentric part. In the working state, the transmission assembly transmits the rotary motion of the motor into the eccentric motion of the bottom plate. The lower surface of the base plate is provided with sand paper or other polishing members, and the polishing members move together with the base plate so as to polish and polish the surface to be processed.

In order to limit the swinging of the bottom plate beyond a preset angle, the sander further comprises a support member. However, the prior support piece has larger longitudinal dimension, which is not beneficial to reducing the longitudinal dimension of the whole sander.

Disclosure of Invention

A sander, comprising: the motor comprises a bottom plate, a motor, a shell and a supporting piece; the base plate is used for mounting sand paper, the motor is used for driving the base plate to swing, the shell is used for accommodating the motor, and the supporting piece is arranged between the shell and the base plate; wherein the support piece comprises support feet; the support legs are supported longitudinally between the housing and the base plate and include curved sections formed by bending transversely.

Further, the support member includes a plurality of support legs, and a plurality of support legs are all crooked to the direction that keeps away from the motor.

Alternatively, the support member includes a plurality of support legs, each of which is curved in a direction approaching the motor.

Alternatively, the support member includes a plurality of support feet that are alternately curved to two opposite sides.

Further, the ratio of the dimension of the bending section in the longitudinal direction to the dimension of the supporting leg in the longitudinal direction is greater than or equal to 0.4 and less than or equal to 0.85.

Further, the ratio of the dimension of the curved section in the transverse direction to the dimension thereof in the longitudinal direction is 0.1 or more and 1 or less.

Further, the length-diameter ratio of the supporting leg is more than or equal to 5 and less than or equal to 15.

Further, the support piece further comprises a top seat for connecting the shell and a base for connecting the base plate, the support foot further comprises two sections of connecting sections which are respectively connected with the top seat and the base, the connecting sections are formed by extending approximately longitudinally, and the bending sections are smoothly connected between the two connecting sections.

Further, the maximum spread angle of the bending section is 50 degrees or more and 150 degrees or less.

Further, the ratio of the length of the supporting leg to the dimension of the supporting leg in the longitudinal direction is 1.1 or more and 2 or less.

Another sander, comprising: the motor comprises a bottom plate, a motor, a shell and a supporting piece; the base plate is used for mounting sand paper, the motor is used for driving the base plate to swing, the shell is used for accommodating the motor, and the supporting piece is arranged between the shell and the base plate; wherein, support includes: supporting feet; the support legs are supported longitudinally between the housing and the base and include a twisted section.

A support suitable for a sander, wherein the sander comprises: a base plate for mounting sand paper, a motor for driving the base plate to swing, and a housing for accommodating the motor; the support is arranged between the shell and the bottom plate; the support comprises: supporting feet; the support legs are supported longitudinally between the housing and the base plate and include curved sections formed by bending transversely.

Another support member suitable for a sander, wherein the sander comprises: a base plate for mounting sand paper, a motor for driving the base plate to swing, and a housing for accommodating the motor; the support is arranged between the shell and the bottom plate; the support comprises: supporting feet; the support legs are supported longitudinally between the top and bottom seats and include a twisted section.

The support piece of the sander can be shortened in longitudinal size and meanwhile the service life of the support piece can be prolonged.

Drawings

FIG. 1 is a schematic view of a sander according to a first embodiment of the present invention;

FIG. 2 is a partial interior view of the sander of FIG. 1;

FIG. 3 is a perspective view of the support of FIG. 2;

FIG. 4 is a plan view of the support of FIG. 2;

FIG. 5 is a cross-sectional view of a support foot of the support member of FIG. 2;

FIG. 6 is a cross-sectional view of the support of FIG. 2 in a lateral direction;

FIG. 7 is a perspective view of a support member in a sander according to a second embodiment of the present invention;

FIG. 8 is a perspective view of a support member in a sander according to a third embodiment of the present invention;

fig. 9 is a perspective view showing a supporting member in a sander according to a fourth embodiment of the present invention.

Detailed Description

The invention is described in detail below with reference to the drawings and the specific embodiments.

The sander 100 of the first embodiment as shown in fig. 1 and 2 may include: a housing 11, a switch (not shown), a base plate 12, a power mechanism (not shown) and a support 20.

The housing 11 is formed with a handle portion 111, a housing portion 112, and a holder portion 113 as an outer shape portion of the sander 100. The handle portion 111 is for a user to hold, and one end thereof is connected to the housing portion 112, and the other end thereof is connectable to a cable for connecting an external power source. The housing portion 112 is located between the handle portion 111 and the bracket portion 113, and forms a housing chamber for at least part of the power mechanism therein. The stand portion 113 is for covering the power mechanism and the support 20.

A switch may be mounted to the housing 11, where the switch may be the main switch for activating the sander 100.

The bottom plate 12 is used for installing a polishing member, and realizes polishing and polishing functions. One side of the base plate 12, which is close to the housing 11, is provided with a support member 20, and the other side of the base plate 12 is provided with a sanding member such as sandpaper.

The power mechanism may include a motor and drive assembly for driving the base plate 12 in a swinging motion. For the plate swing type sander 100, the base plate 12 includes a central axis, the central axis passes through the base plate 12, the power mechanism can drive the base plate 12 to rotate about a straight line parallel to the central axis as an axis, and meanwhile, the power mechanism also drives the base plate 12 to swing around the central axis thereof within a preset angle range, so that the functions of sanding and polishing of the sander 100 are realized.

Wherein, the motor is as the prime mover, and it sets up in the accommodation chamber that holds portion 112 and forms, and the motor includes the motor shaft that is used for exporting power to drive assembly, and the motor shaft can rotate around the motor axis. The transmission assembly is provided between the motor and the base plate 12 for transmitting power of the motor to the base plate 12 and swinging the base plate 12 with respect to the housing 11.

The structure of the support 20 is described in detail below:

it is known that, for the plate swing type sander 100, the base plate 12 needs to be limited to swing within a preset angle range during the movement process, so that the base plate 12 is prevented from swinging beyond the preset angle to rotate, and the base plate 12 can swing back and forth or left and right due to possible gaps between the motor and each component of the transmission assembly, so that not only the sanding or polishing effect of the sander 100 is affected, but also severe vibration is generated, and a user can feel tired in a shorter time.

For this purpose we also provide a support 20 between the housing 11 and the base plate 12, more specifically the support 20 is provided between the bracket portion 113 of the housing 11 and the base plate 12.

For the base plate 12 having a substantially rectangular structure, the number of the supporting members 20 may be four, and the four supporting members 20 may be disposed at four corners of the base plate 12, but the number and positions of the supporting members 20 are not limited thereto.

As shown in fig. 1 to 4, the support 20 includes: a top base 21, a base 22, and a supporting leg 23, the top base 21 being for connecting one end of the supporting member 20 to the housing 11, the base 22 being for connecting the other end of the supporting member 20 to the base 22, the supporting leg 23 being supported longitudinally between the housing 11 and the base plate 12, and further the supporting leg 23 being supported longitudinally between the top base 21 and the base 22.

For convenience of description of the present invention, a longitudinal direction is defined as a direction substantially parallel to a motor axis of the motor, a transverse direction is defined as a direction substantially perpendicular to the motor axis, and in the longitudinal direction, a direction in which the support 20 points toward the top base 21 is upward, and a direction in which the support 20 points toward the bottom base 22 is downward. The dimensions of the support leg 23 in each direction described below may be the reference object in a state where the support 20 is mounted between the housing 11 and the base plate 12.

Specifically, the top base 21 is connected to the bracket 113 of the housing 11, and the support leg 23 is connected to the top base 21 at the upper end in the longitudinal direction, and the support leg 23 and the top base 21 may be fixedly connected by an integrally molded manner such as injection molding. The base 22 is connected to the upper side of the base plate 12, and the support leg 23 is connected to the base 22 at its lower end in the longitudinal direction, where the support leg 23 and the base 22 may also be fixedly connected by means of integral molding such as injection molding.

For one support 20, it may include a plurality of support legs 23, for example, in the present embodiment, one support 20 includes 5 support legs 23, and it is obvious that the number of support legs 23 is not limited thereto. The support leg 23 includes: two connecting sections and a bending section 231, wherein the two connecting sections are a top section 232 close to the top seat 21 and a bottom section 233 close to the base 22 respectively, and the bending section 231 is arranged between the top section 232 and the bottom section 233. In this way, the structure of the support leg 23 including the bending section 231 can reduce the longitudinal height of the support member 20, thereby achieving the purpose of reducing the longitudinal height of the whole sander 100, and at the same time, can avoid the increase of the stress of the support member 20 in the case of the reduction of the height; moreover, the support 20 can also ensure that its rigidity in the longitudinal and transverse directions meets the requirements; in addition, the service life of the support 20 can be extended. It will be appreciated that the supporting leg 23 may be directly connected to the top seat 21 and the bottom seat 22 at both ends of the curved section 231, and the supporting leg 23 may not include a connecting section, or the connecting section may be small in size and almost negligible.

Specifically, a top section 232 is provided at the upper end of the curved section 231, the top section 232 extending substantially longitudinally, the top section 232 being adapted to provide a fixed connection of the support leg 23 with the top seat 21. A bottom section 233 is provided at the lower end of the curved section 231, the bottom section 233 also extending generally longitudinally, the bottom section 233 being adapted to provide a fixed connection of the support foot 23 to the base 22.

The bending section 231 is connected between the top section 232 and the bottom section 233, and the bending section 231 is formed by bending in a lateral direction between the top section 232 and the bottom section 233. The ends of the curved section 231 are also smoothly connected to the top and bottom sections 232 and 233, respectively. The formation of the curved section 231 can be understood as extending from the top section 232 in a lateral direction toward away from the top section 232 and then folded back in a lateral direction toward the bottom section 233. For one support 20, in the present embodiment, the plurality of support legs 23 are alternately bent toward two opposite sides, that is, one of the adjacent two support legs 23 may be bent in a lateral direction toward a direction away from the motor to form a bent section 231, and the other may be bent in a lateral direction toward a direction toward the motor to form a bent section 231.

As shown in fig. 4 and 5, for the entire support leg 23, the formation of the top section 232, the curved section 231, and the bottom section 233 thereof can be understood as the support leg 23 having a center line 101, and then moving about the center line 101 by an infinitely small cylinder and along the extending direction of the center line 101, thereby forming a support leg 23.

For the single support leg 23, the ratio of the dimension L1 of the curved section 231 in the longitudinal direction to the dimension L2 of the support leg 23 in the longitudinal direction is 0.3 or more and 0.85 or less, and further, the ratio of the dimension L1 of the curved section 231 in the longitudinal direction to the dimension L2 of the support leg 23 in the longitudinal direction is 0.5 or more and 0.85 or less; the length-diameter ratio of the supporting leg 23 may be equal to or greater than 8 and equal to or less than 15, and further, the length-diameter ratio of the supporting leg 23 may be equal to or greater than 10 and equal to or less than 13; the ratio of the length of the support leg 23 to the dimension L2 of the support leg 23 in the longitudinal direction is 1.1 or more and 2 or less. For the curved section 231, a ratio of a dimension L3 of the curved section 231 in the transverse direction to a dimension L1 of the curved section 231 in the longitudinal direction is 0.2 or more and 1 or less, and further, a ratio of the dimension L3 of the curved section 231 in the transverse direction to the dimension L1 of the curved section 231 in the longitudinal direction is 0.5 or more and 0.8 or less; further, the maximum spread angle α of the curved section 231 is 50 degrees or more and 150 degrees or less, and further, the maximum spread angle α of the curved section 231 is 90 degrees or more and 130 degrees or less. In this way, by limiting the length, the size and the degree of bending of the bending section 231, it is further ensured that the stress of the support foot 23 is not significantly increased while reducing the longitudinal dimension of the support foot 23, while also ensuring that the rigidity of the support foot 23 in the longitudinal and transverse directions meets the requirements.

Here, the aspect ratio of the supporting leg 23, the length of the supporting leg 23, and the maximum expansion angle α need to be further explained. As shown in fig. 5 and 6, the aspect ratio of the support foot 23 refers to the ratio between the actual length of the centerline 101 of the support foot 23 shown in fig. 5 and the diameter D of the support foot 23 shown in fig. 6, and the length of the support foot 23 refers to the actual length of the centerline 101 of the support foot 23 shown in fig. 5.

As shown in fig. 5, the maximum extension angle α of the support leg 23 may be defined as follows: the point O is the point where the curved segment 231 is furthest from the top segment 232 in the transverse direction, the point a is the junction of the curved segment 231 and the top segment 232, and the point B is the junction of the curved segment 231 and the bottom segment 233. Thus, the connection point O and the connection point a form a straight line, and the connection point O and the connection point B form a straight line, and an included angle is formed between the two straight lines, and the included angle can be understood as the maximum expansion angle α of the bending section 231.

In this embodiment, as shown in fig. 6, the supporting feet 23 may also be arranged in a substantially arc shape in the transverse direction, so as to adapt to the swinging movement of the base plate 12 relative to the housing 11.

The present invention also proposes a sander of a second embodiment, in which, as shown in fig. 7, it may differ from the first embodiment only in the specific structure of the support 30. The compatible structure and principle of the first embodiment can be applied to this embodiment, and detailed descriptions thereof are omitted. Only the differences of the present embodiment with respect to the first embodiment will be described below:

in the present embodiment, the supporting member 30 may have the same top seat 31 and base seat 32 as those of the first embodiment, and the difference is only that the bending directions of the supporting legs 33 are different, and in the present embodiment, the plurality of supporting legs 33 are each bent in a direction away from the motor to form a bending section 331. Of course, it will be appreciated that in other embodiments, the plurality of support legs 33 can each be bent toward the direction proximate the motor to form the curved section 331.

The present invention also proposes a sander of a third embodiment, in which, as shown in fig. 8, it may differ from the first embodiment only in the specific structure of the support 40. The compatible structure and principle of the first embodiment can be applied to this embodiment, and detailed descriptions thereof are omitted. Only the differences of the present embodiment with respect to the first embodiment will be described below:

in this embodiment, the supporting member 40 may have the same top seat 41 and base 42 as those of the first embodiment, except that the supporting leg 43 further includes a twisted section 431 disposed between the top section and the bottom section, and the twisted section 431 is twisted to extend from the connection with the top section to the bottom section.

The present invention also proposes a sanding machine of a fourth embodiment, which, as shown in fig. 9, may differ from the first embodiment only in the specific structure of the support 50. The compatible structure and principle of the first embodiment can be applied to this embodiment, and detailed descriptions thereof are omitted. Only the differences of the present embodiment with respect to the first embodiment will be described below:

in this embodiment, the supporting member 50 may have the same top and bottom seats 51 and 52 as the first embodiment, and the difference is only that the specific structure of the supporting leg 53 is different. In the present embodiment, the supporting leg 53 is a curved section curved toward one side in a manner similar to an arc, and the supporting leg 53 may not be provided with a connecting section to the top base 51 and the bottom base 52, respectively, or the connecting section to the top base 51 and the bottom base 52 may be small in size and almost negligible.

The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be appreciated by persons skilled in the art that the above embodiments are not intended to limit the invention in any way, and that all technical solutions obtained by means of equivalent substitutions or equivalent transformations fall within the scope of the invention.

Claims

1. A sander, comprising:

a base plate for mounting sandpaper;

the motor is used for driving the bottom plate to swing;

a housing for accommodating the motor;

a support disposed between the housing and the base plate;

wherein,

the support includes:

the top seat is used for connecting the shell;

the base is used for connecting the bottom plate;

the support legs longitudinally support the shell and the bottom plate and comprise bending sections formed by bending transversely, the support legs comprise two connecting sections which are respectively connected with the top seat and the base, the connecting sections are formed by extending approximately longitudinally, and two ends of each bending section are smoothly connected between the two connecting sections.

2. A sander as set forth in claim 1, wherein:

the supporting legs are bent in a direction away from the motor.

3. A sander as set forth in claim 1, wherein:

the supporting feet are bent towards the direction close to the motor.

4. A sander as set forth in claim 1, wherein:

a plurality of the supporting legs are alternately bent to two opposite sides.

5. A sander as set forth in claim 1, wherein:

the ratio of the dimension of the bending section in the longitudinal direction to the dimension of the supporting leg in the longitudinal direction is more than or equal to 0.4 and less than or equal to 0.85.

6. A sander as set forth in claim 1, wherein:

the ratio of the dimension of the curved section in the transverse direction to the dimension thereof in the longitudinal direction is 0.1 or more and 1 or less.

7. A sander as set forth in claim 1, wherein:

the length-diameter ratio of the supporting legs is more than or equal to 5 and less than or equal to 15.

8. A sander as set forth in claim 1, wherein:

the maximum spreading angle of the bending section is greater than or equal to 50 degrees and less than or equal to 150 degrees.

9. A sander as set forth in claim 1, wherein:

the ratio of the length of the supporting leg to the longitudinal dimension of the supporting leg is more than or equal to 1.1 and less than or equal to 2.

10. A sander as set forth in claim 1, wherein:

the supporting legs are integrally formed with at least one of the top seat and the base.