CN215659543U

CN215659543U - Sanding machine

Info

Publication number: CN215659543U
Application number: CN202121136599.3U
Authority: CN
Inventors: 葛剑妮; 李玉红; 张小荣; 陈坚跃
Original assignee: Changzhou Create Electric Appliance Co ltd
Current assignee: Changzhou Create Electric Appliance Co ltd
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2022-01-28
Anticipated expiration: 2031-05-25

Abstract

The utility model discloses a sanding machine, which is characterized in that: the motor is fixedly arranged in the shell, a motor shaft of the motor extends downwards, and the fan blades are fixedly arranged on the lower portion of the motor shaft of the motor. The lower extreme of motor shaft is equipped with the eccentric wheel, and the eccentric wheel is located the downside of fan blade, and the bottom plate mount pad rotates through corresponding bearing and sets up on this eccentric wheel, and the bottom plate is fixed to be set up on the bottom plate mount pad. The brake disc is an integrated piece made of rubber materials. The middle part of the brake disc is provided with a through hole which penetrates through the upper part and the lower part of the brake disc. 3-8 groups of elastic brake blocks are arranged on the inner wall of the through hole of the brake disc at equal intervals along the circumferential direction, the elastic brake blocks are provided with adjusting holes penetrating through the elastic brake blocks, the elastic brake blocks are provided with inward-protruding friction parts along the radial direction of the brake disc, the friction parts are provided with friction surfaces coaxial with a motor shaft of the motor, and the radius of each friction surface is equal to the outer diameter of the bottom plate mounting seat. The bottom plate mounting seat is contacted with the friction surface of the friction part of the corresponding elastic brake block when swinging.

Description

Sanding machine

Technical Field

The utility model relates to the technical field of electric tools, in particular to a sanding machine.

Background

At present, the sander is widely applied to sanding of wall surfaces or ground surfaces. When the sander works, the motor drives the bottom plate to polish the surface to be polished, so that the surface to be polished is smooth and flat. A typical sander mainly includes: the polishing machine comprises a shell, a motor and a bottom plate, wherein the motor drives the bottom plate to swing or rotate to perform polishing operation. To produce the oscillation, the base plate is usually mounted on an eccentric. When the computer is shut down, the bottom plate can continuously run for a while under the action of inertia, so that articles are easily damaged or personal injuries are easily caused, and the bottom plate is required to be stopped as soon as possible. The existing sander is mostly provided with a brake device, the existing sander has a complex structure and is troublesome to maintain and replace, the existing sander is always in a brake state when being used in an integrated ring mode, the brake resistance increases the energy consumption during working, the cruising ability of equipment is reduced, and once the sander is broken, the sander cannot continue to work.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a sander which is simple in structure and good in use reliability.

The basic technical scheme for realizing the purpose of the utility model is as follows: a sander is structurally characterized in that: comprises a casing component, a motor, a fan blade, a bottom plate mounting seat, a brake disc and a bottom plate. The chassis assembly includes a front housing and a rear housing. The front shell and the rear shell are fixedly connected to form a machine shell with a cavity, and a circuit board is arranged in the machine shell. The motor is fixedly arranged in the shell, a motor shaft of the motor extends downwards, and the fan blades are fixedly arranged on the lower portion of the motor shaft of the motor. The lower extreme of motor shaft is equipped with the eccentric wheel, and the eccentric wheel is located the downside of fan blade, and the bottom plate mount pad rotates through corresponding bearing and sets up on this eccentric wheel, and the bottom plate is fixed to be set up on the bottom plate mount pad. The brake disc is an integrated piece made of rubber materials. The middle part of the brake disc is provided with a through hole which penetrates through the upper part and the lower part of the brake disc. 3-8 groups of elastic brake blocks are arranged on the inner wall of the through hole of the brake disc at equal intervals along the circumferential direction, the elastic brake blocks are provided with adjusting holes penetrating through the elastic brake blocks, the elastic brake blocks are provided with inward-protruding friction parts along the radial direction of the brake disc, the friction parts are provided with friction surfaces coaxial with a motor shaft of the motor, and the radius of each friction surface is equal to the outer diameter of the bottom plate mounting seat. The bottom plate mounting seat is contacted with the friction surface of the friction part of the corresponding elastic brake block when swinging.

The technical scheme based on the basic technical scheme is as follows: the lower part of the left side of the rear shell is provided with a dust outlet facing the upper right, and the dust outlet is used for connecting and installing a corresponding dust collecting bag. The upper part and the right part of the rear side of the rear shell are both provided with a rear shell air inlet. The lower part of the front side of the front shell is provided with an air outlet, and the upper part and the right part of the front side of the front shell are both provided with a front shell air inlet. The upper part of the left side of the casing is provided with a switch. The circuit board is positioned between the rear shell air inlet at the right part of the rear shell and the front shell air inlet at the rear shell air inlet at the right part of the front shell. The upper part of the front shell is provided with a speed regulating switch. The upper side of the brake disc is provided with a group of mounting buckles. The brake disc is fixedly arranged on the lower side of the shell through clamping of a buckle.

The technical scheme based on the corresponding technical schemes is as follows: and a convex shoulder is arranged at the upper part of the periphery of the bottom plate mounting seat. The corresponding part of the upper side of the friction part of the elastic brake block is in sliding contact with the lower side of the convex shoulder. The corresponding portion of the resilient brake block is located between the shoulder and the base plate.

The technical scheme based on the corresponding technical schemes is as follows: the periphery of the lower side of the brake disc is provided with a protective cover part.

The utility model has the following beneficial effects: (1) the sander has a simple structure, and the bottom plate can be stopped quickly through the brake device, so that the use safety of the sander is greatly improved. The brake device adopts a multi-surface contact mode, the total area of the friction contact part of the equipment and the brake device is reduced when the equipment works, and the endurance of the equipment is favorably improved.

(2) When the sander is shut down, the bottom plate mounting seat continuously swings under the action of inertia to contact with the friction surface of the friction part of the corresponding elastic brake block, the friction part is pushed outwards, the adjusting hole is contracted, the friction part is changed to generate inward pushing force, so that friction resistance is generated when the periphery of the bottom plate mounting seat is contacted with the friction surface, and the bottom plate mounting seat is braked by each elastic brake block to quickly stop rotating. The corresponding part of the upper side surface of the friction part is in sliding contact with the lower side surface of the convex shoulder, and a certain braking effect is also achieved.

(3) The corresponding part of the elastic brake block of the brake disc of the sander is positioned between the convex shoulder and the bottom plate, so that the use reliability of the sander is improved, the radial deformation is ensured, and good surface contact friction in the radial direction is ensured.

(4) The brake disc of the sander is provided with the protective cover part, so that the contact part of an operator and a bottom plate can be reduced, and the use safety is improved.

(5) The sander is characterized in that the lower part of the sander is provided with an air outlet, the upper part and the right part of the sander are provided with air inlets, the circuit board is positioned between the rear shell air inlet at the right part of the rear shell and the front shell air inlet at the right part of the front shell, and the fan blades discharge heat in the shell through the air outlet to cool the motor and the cable team, so that the sander is beneficial to protecting equipment and prolonging the service life of the equipment.

(6) The elastic brake blocks of the sander are independent, and after being damaged respectively, the rest of the elastic brake blocks can work normally, so that the use reliability and safety are further improved.

Drawings

Fig. 1 is a schematic structural diagram of a sander of the present invention.

Fig. 2 is a rear view of fig. 1.

Fig. 3 is a left side view of fig. 1.

Fig. 4 is a right-side schematic view of fig. 1.

Fig. 5 is a schematic bottom view of fig. 1.

Fig. 6 is a schematic view as viewed from the upper right front of fig. 1.

Fig. 7 is a schematic view as viewed from the front right lower side of fig. 1.

Fig. 8 is a schematic view when viewed from the left rear lower side of fig. 1.

Fig. 9 is a schematic structural view of the brake disc as viewed from the upper right front of fig. 1.

Fig. 10 is a schematic structural view of the brake disc as viewed from the front right lower side of fig. 1.

Fig. 11 is a schematic structural view of the base plate mounting seat.

Fig. 12 is a schematic view of the upper plate when viewed from the left front lower side of fig. 1.

The reference numbers in the drawings are:

a machine shell component 1, a front shell 11, an air outlet 11-1, a front shell air inlet 11-2, a rear shell 12, a dust outlet 12-1, a rear shell air inlet 12-2, a switch 13 and a speed regulating switch 14,

the eccentric wheel (2) is provided with a cam,

a fan blade 3 which is provided with a fan blade,

the base plate mounting seat 4, the shoulder 41,

a brake disc 5, a through hole 51, a protective cover part 52, a buckle 53, an elastic brake block 54, an adjusting hole 54-1, a friction part 54-2, a friction surface 54-21,

a bottom plate 6.

Detailed Description

In order that the present invention may be more readily and clearly understood, a more particular description of the utility model briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings. The orientation of the present invention is described according to the orientation shown in fig. 1, that is, the up-down and left-right directions shown in fig. 1 are the up-down and left-right directions described, and the side facing fig. 1 is the front side and the side facing away from fig. 1 is the rear side.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.

It is to be understood that the terms "upper", "lower", "inner", "outer", and the like, indicate orientations or positional relationships based on the positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention or for simplifying the description, but do not indicate that a particular orientation must be present.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

(example 1)

Referring to fig. 1 to 11, the sander of the present invention includes a housing assembly 1, a motor, a fan blade 3, a base plate mounting seat 4, a brake disc 5 and a base plate 6. The cabinet assembly 1 includes a front case 11 and a rear case 12. The front case 11 and the rear case 12 are fixedly coupled to form a chassis having a cavity, in which a circuit board is mounted. The lower part of the left side of the rear shell 12 is provided with a dust outlet 12-1 facing the upper right, and the dust outlet 2-1 is used for connecting and installing a corresponding dust collecting bag. The upper part and the right part of the rear side of the rear shell 12 are both provided with a rear shell air inlet 12-2. The lower part of the front side of the front shell 11 is provided with an air outlet 11-1, and the upper part and the right part of the front side of the front shell 11 are both provided with a front shell air inlet 11-2. The upper part of the left side of the machine shell is provided with a switch 13. The circuit board is positioned between the rear case intake vent 12-2 at the right portion of the rear case 12 and the rear case intake vent front case intake vent 11-2 at the right portion of the front case 11.

The upper portion of front casing 11 is equipped with speed governing switch 14, and speed governing switch 14 divides into low, well, high third gear, presses and switches over one grade once, and from low to well high to low circulation in proper order, and the anterior lower supreme three gear pilot lamps that are equipped with in proper order of speed governing switch 14, three gear pilot lamps are from last to being low, well, high in proper order. The right side of the casing is provided with a battery socket for installing a corresponding battery pack switch 13 which is electrically connected with the circuit board through a corresponding circuit, and a speed regulating switch 14 which is electrically connected with the circuit board through a corresponding circuit.

Referring to fig. 1 to 8, the motor is fixedly disposed in the casing, a motor shaft thereof extends downward, and the fan blade 3 is fixedly disposed on a lower portion of the motor shaft of the motor, corresponding to a position of the air outlet 11-1 of the front casing 11. The lower extreme of motor shaft is equipped with eccentric wheel 2, and eccentric wheel 2 is located the downside of fan blade 3, and bottom plate mount pad 4 rotates through corresponding bearing and sets up on this eccentric wheel 2, and bottom plate 6 is fixed to be set up on bottom plate mount pad 4 to drive eccentric wheel 2 when the motor shaft of motor rotates and rotate, eccentric wheel 2 drives bottom plate mount pad 4 swing, and bottom plate mount pad 4 rotates simultaneously at the swing in-process, and bottom plate mount pad 4 drives bottom plate 6 and polishes the operation. The upper part of the periphery of the soleplate installing seat 4 is provided with a convex shoulder 41.

The brake disc 5, see fig. 1 to 10, is a single piece made of rubber material. The middle part of the brake disc 5 is provided with a through hole 51 which penetrates through the upper part and the lower part of the brake disc. A protective cover part 52 is arranged on the periphery of the lower side of the brake disc 5. The upper side of the brake disc 5 is provided with a set of mounting catches 53. The brake disc 5 is fixedly arranged on the lower side of the machine shell in a clamping mode through a buckle 53. 3-8 groups of elastic brake blocks 54 are arranged on the inner wall of the through hole 51 of the brake disc 5 at equal intervals along the circumferential direction, the group is 4 in the embodiment, the elastic brake blocks 54 are provided with adjusting holes 54-1 penetrating through the upper part and the lower part of the elastic brake blocks, the elastic brake blocks 54 are provided with friction parts 54-2 protruding inwards along the radial direction of the brake disc 5, the friction parts 54-2 are provided with friction surfaces 54-21 coaxial with the motor shaft of the motor, and the radius of each friction surface 54-21 is equal to the outer diameter of the part, located on the lower side of the shoulder 41, of the base plate mounting seat 4. The base plate mounting seat 4 is brought into contact with the frictional surface 54-21 of the frictional portion 54-2 of the corresponding elastic brake pad 54 while swinging, and the corresponding portion of the upper side surface of the frictional portion 54-2 is brought into sliding contact with the lower side surface of the shoulder 41. The base plate 6 is fixedly arranged on the underside of the base plate mounting 4, with the corresponding part of the resilient brake block 54 being located between the shoulder 41 and the base plate 6.

When the sander is shut down, the bottom plate mounting seat 4 continuously swings under the inertia effect, the bottom plate mounting seat 4 contacts the friction surface 54-21 of the friction part 54-2 of the corresponding elastic brake block 54, the friction part 54-2 is pushed outwards, the adjusting hole 54-1 contracts, and the friction part 54-2 deforms to generate a force pushing inwards, so that the friction resistance is generated when the periphery of the bottom plate mounting seat 4 contacts the friction surface 54-21, and the bottom plate mounting seat 4 is braked by each elastic brake block 54 to stop rotating quickly.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sander is characterized in that: the motor comprises a shell component, a motor, a fan blade, a bottom plate mounting seat, a brake disc and a bottom plate; the case assembly comprises a front case and a rear case; the front shell and the rear shell are fixedly connected to form a shell with a cavity, and a circuit board is arranged in the shell; the motor is fixedly arranged in the shell, a motor shaft of the motor extends downwards, and the fan blades are fixedly arranged on the lower part of the motor shaft of the motor; the lower end of the motor shaft is provided with an eccentric wheel which is positioned at the lower side of the fan blade, a bottom plate mounting seat is rotatably arranged on the eccentric wheel through a corresponding bearing, and a bottom plate is fixedly arranged on the bottom plate mounting seat; the brake disc is an integrated piece made of rubber material; the middle part of the brake disc is provided with a through hole penetrating through the upper part and the lower part of the brake disc; 3-8 groups of elastic brake blocks are arranged on the inner wall of the through hole of the brake disc at equal intervals along the circumferential direction, the elastic brake blocks are provided with adjusting holes penetrating through the elastic brake blocks, the elastic brake blocks are provided with inward-protruding friction parts along the radial direction of the brake disc, the friction parts are provided with friction surfaces coaxial with a motor shaft of the motor, and the radius of each friction surface is equal to the outer diameter of the bottom plate mounting seat; the bottom plate mounting seat is contacted with the friction surface of the friction part of the corresponding elastic brake block when swinging.

2. The sander as set forth in claim 1, wherein: the lower part of the left side of the rear shell is provided with a dust outlet facing to the upper right, and the dust outlet is used for connecting and installing a corresponding dust collection bag; the upper part and the right part of the rear side of the rear shell are both provided with a rear shell air inlet; the lower part of the front side of the front shell is provided with an air outlet, and the upper part and the right part of the front side of the front shell are both provided with a front shell air inlet; a switch is arranged at the upper part of the left side of the casing; the circuit board is positioned between the rear shell air inlet at the right part of the rear shell and the rear shell air inlet front shell air inlet at the right part of the front shell; the upper part of the front shell is provided with a speed regulating switch; a group of mounting buckles are arranged on the upper side of the brake disc; the brake disc is fixedly arranged on the lower side of the shell through clamping of a buckle.

3. The sander as set forth in claim 1, wherein: a convex shoulder is arranged at the upper part of the periphery of the bottom plate mounting seat; the corresponding part of the upper side surface of the friction part of the elastic brake block is in sliding contact with the lower side surface of the convex shoulder; the corresponding portion of the resilient brake block is located between the shoulder and the base plate.

4. The sander as set forth in claim 1, wherein: the periphery of the lower side of the brake disc is provided with a protective cover part.