CN200963782Y

CN200963782Y - Multifunctional sanding machine

Info

Publication number: CN200963782Y
Application number: CN 200620146951
Authority: CN
Inventors: 张士松
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2006-11-03
Filing date: 2006-11-03
Publication date: 2007-10-24
Anticipated expiration: 2016-11-03

Abstract

A multifunctional sanding machine comprises a shell (1, 1 a), a motor installed inside the shell, a switch controlling two-way motor operation, the first driving shaft (21, 21a) in which the rotation is driven by the motor, an eccentric device (3, 3 a) combined with the first driving shaft, a floor (6, 6 a) combined with the eccentric devices (3, 3 a) and a swing frame (5, 5a) in flexible linkage with the shell. A one-way clutch (4, 4a) is also provided between the eccentric devices (3, 3 a) and the swing frame (5, 5a). When the motor is in rotation, the one-way clutch enables the swing frame to combine with the floor so that the plate sand can be implemented. When the motor is in reversal rotation, the one-way clutch enables the swing frame to detach from the floor so that the round sand can be implemented. Thereby, the switch of round and plate sands these two different functions can be easily implemented. Moreover the structure is simple and the cost is also reduced.

Description

Multifunction sander

Affiliated technical field

The utility model relates to a kind of hand electric grinding tool, and especially a kind of have a bifunctional sander.

Background technology

Existing sander comprises round sand and plate sand etc., and wherein the polishing base plate of round sand can freely be rotated with respect to the axis of eccentric shaft, and this eccentric shaft is with respect to the eccentric setting of motor drive shaft, and polishing base plate is done irregular orbital motion, is used for the relatively large material of grinding; The polishing base plate of plate sand cannot freely be rotated with respect to the axis of eccentric shaft, and therefore, polishing base plate is merely able to do the orbital motion of rule, is applicable to grinding material in a small amount, for example is used for retrofit or fine finishining.If when the user wishes to have correct grinding and two kinds of working abilities of fine grinding, just must have two kinds of different instruments of round sand machine and dull and stereotyped sand.

And U.S. Pat 6132300 discloses a kind of difunctional sander in October, 2000, and this sander matches with jockey by changing polishing base plate, realizes circle sand and these two kinds of functions of plate sand.And this sander will be realized the conversion of circle sand and plate sand in use, just must change base plate, makes that the user bothers when work very much, inconvenience.Add that this jockey comprises a plurality of rigid members and a plurality of flexible cylinder, complex structure, and the moment that flexible cylinder is subjected to is big, loses efficacy easily, and the material requirements height to flexible cylinder during production causes cost to increase.

U.S. Pat 6749493 discloses a kind of multifunction sander in June, 2004, but this sander is by a motion mode that the switching device preliminary election is different in the transmission device, and switching device has the housing of a two-piece type, the switch ring that passes housing, and two intermeshing first gears and second gear.Switch ring tool two arcs, axially pass the circular arc-shaped recess of switch ring, two alignment pins pass circular arc-shaped recess respectively and cooperate with recess on first gear and second gear, realize the plate sand of two kinds of friction speeds, if but two alignment pins all break away from the recess on first gear and second gear, then realize circle sand.The part of this sander is many, and the structure more complicated makes cost higher; In addition between the housing of two-piece type and the switch ring for rigidity connects, its vibration is bigger, the comfortableness in when operation influence.

European patent EP 0525328 discloses a kind of improved sander in February, 1993, this sander is realized the transformation of circle sand and plate sand when installing attachment device at casing and base plate, realizing plate sand by means of an attachment device; When pulling down attachment device, then realize circle sand.The user just must often utilize this attachment device of instrument dismounting to justify sand and plate sand switches, and bothers very much when making work, inconvenience.And attachment device and base plate be that rigidity connects, and its vibration is bigger, the comfortableness during the influence operation.

The utility model content

Main purpose of the present utility model is to provide a kind of simple in structure, easy to operate, difunctional sander that cost is low.

Another purpose of the present utility model is to provide a kind of difunctional sander with good counterbalance effect

The technical scheme that its technical problem that solves the utility model adopts is: a kind of multifunction sander, comprise housing, be installed in the motor in the housing, control the switch of described motor two-direction running, drive first driving shaft of rotation by motor, reach the eccentric that connects with first driving shaft, the base plate that connects with eccentric, and the swing span that is connected with housing elasticity, wherein eccentric comprises with respect to eccentric second driving shaft that is provided with of described first driving shaft, it is characterized in that: also comprise the one-way clutch that is arranged between eccentric and the swing span, when motor when first direction rotates, described one-way clutch makes described swing span and described eccentric connect, and freely rotates with respect to the axis of second driving shaft to prevent described base plate; When motor when second direction is rotated, described one-way clutch makes described swing span and described eccentric break away from, described base plate can freely rotate with respect to the axis of second driving shaft.

Described one-way clutch comprises wedge-shaped slot, movably brake component and the flexible member that connects with described brake component, and wherein said swing span and described sliding bearing have formed described wedge-shaped slot, and described brake component and described flexible member are contained in wedge-shaped slot.

Described one-way clutch comprises the boss that connects with described second outer ring, the flexible member that connects of brake component and described brake component movably, described boss is provided with groove that holds described brake component and the accepting groove of accommodating described flexible member, and described groove links to each other with described accepting groove.

The beneficial effects of the utility model are: set up an one-way clutch in the sander, when switch control motor forward and backward, can make the brake component in this one-way clutch move, thereby change the relation that connects between swing span and the base plate, connect indirectly with base plate as swing span and to be in the same place, then realize plate sand; Throw off as swing span and base plate, then realize circle sand.Like this, just can justify the switching of sand and these two kinds of difference in functionalitys of plate sand very easily, operation is very easy, and simple in structure, cost has also reduced.And because the number of moving component does not change in two kinds of functions, the vibrations that produce in this two states just are the same, its barycenter can not change because the pattern of motion is different yet, so the counterbalance effect of this sander is fine under this two states.

Description of drawings

Below in conjunction with drawings and Examples the utility model is described further.

Fig. 1 is the partial cutaway diagrammatic sketch of the utility model multifunction sander first embodiment.

Fig. 2 is along the cutaway view of A-A direction among Fig. 1.

Fig. 3 is a partial enlarged drawing among Fig. 2.

Fig. 4 is the partial cutaway diagrammatic sketch of the utility model multifunction sander second embodiment.

Fig. 5 is the partial exploded view of the utility model multifunction sander second embodiment.

Fig. 6 is along the cutaway view of B-B direction among Fig. 3.

Fig. 7 is along the cutaway view of C-C direction among Fig. 3.

Fig. 8 is a partial enlarged drawing among Fig. 6.

Wherein

1,1a housing 2,

2a motor

21,21a first driving shaft

211,211a

axis

22,22a fan 3,3a eccentric

31,31a second driving shaft 311,311a

axis

32,32a clutch shaft bearing

321. first inner ring, 322. first outer rings 4, the 4a one-way clutch

41,

41a brake component

42,42a flexible member 43a. boss

431a. groove 432a. accepting groove 5, the 5a swing span

51. wedge-shaped slot 52. bottom surfaces 53. sliding bearings

531. inner surface 54a. connecting portion 55a. elastic portion

56a. detent 57a. fixed cover 6, the 6a base plate

The circle 61a. pressing plate 7. foam pad 8a. brake

9a. rolling bearing 91a. ball 92a. second inner ring

93a. second outer ring

The specific embodiment

As shown in Figure 1, among first embodiment of the present utility model, a kind of multifunction sander comprises housing 1, is installed in the motor (not shown) in the housing 1, be installed in the switch (not shown) that is used for controlling the motor two-direction running on the housing, drive first driving shaft 21 that rotates by motor, connect fan 22, reach the eccentric 3 that connects with fan 22 with first driving shaft 21, with the base plate 6 that connects with eccentric 3, and the swing span 5 that is connected with housing 1 elasticity.Wherein motor can be electronic or pneumatic, eccentric 3 comprises with respect to axis 211 eccentric second driving shafts 31 that are provided with of first driving shaft 21 and the clutch shaft bearing 32 that connects with it, here second driving shaft 31 also can be the parts of fan 22 with respect to axis 211 eccentric extensions, and its axis 311 is with respect to the axis 211 offset or dish e of first driving shaft 21.Also be provided with the foam pad 7 of being convenient to install sand paper below the base plate 6.

This multifunction sander also comprises the one-way clutch 4 that is arranged between eccentric 3 and the swing span 5.As shown in Figure 1, this one-way clutch 4 is arranged in the sliding bearing 53, and this sliding bearing 53 is rigidly attached on the swing span 5, and sliding with clutch shaft bearing 32 connects the transmission radial load.Make swing span 5 rotate with respect to first driving shaft 21 all the time like this.

As shown in Figures 2 and 3, one-way clutch 4 comprises several wedge-shaped slots 51 that along the circumferential direction evenly distribute (being 3 in the present embodiment), the brake component 41 that reaches corresponding number and the flexible member 42 (spring in the present embodiment) that connects with brake component, and this brake component 41 is a rolling element.Clutch shaft bearing 32 comprises first inner ring 321 and first outer ring 322, and wherein first inner ring 321 and second driving shaft 31 connect; First outer ring 322 connects (as shown in Figure 1) with base plate 6.

This wedge-shaped slot 51 is formed in first outer ring 322 by the inner surface 531 of sliding bearing 53, and is provided with bottom surface 52, is wedge-shaped slot 51 wider parts near bottom surface 52, is wedge-shaped slot 51 narrower parts away from bottom surface 52.Brake component 41 can move in wedge-shaped slot 51, and an end of spring 42 is against the bottom surface 52, and the other end is against brake component 41.Here, spring 42 is compressed all the time, guarantees the in stable condition of brake component 41.

As shown in Figure 2, work as touch switch, make motor when first direction E rotates (in this example for turning clockwise), motor drives 21 rotations of first driving shaft, drive second driving shaft 31 and clutch shaft bearing 32 rotations, because the effect of frictional force, the rotation of first outer ring 322 drives brake component 41 and moves to the direction that narrows down, this moment, brake component 41 was by being held on (solid line is represented the position of brake component 41 this moment among Fig. 3) between the swing span 5 and first outer ring 322 tightly, thereby making swing span 5 connect with first outer ring 322 is in the same place, also just make base plate 6 connect indirectly and be in the same place, thereby produce brake force, limited base plate 6 and done freely with respect to the axis 311 of second driving shaft 31 and rotate with swing span 5, because swing span 5 is that elasticity is connected with housing 1, therefore, the orbital motion that base plate 6 is merely able to do rule then realizes plate sand function.

Work as touch switch, make motor when second direction F rotates (in this example for being rotated counterclockwise), when motor drives 21 rotations of first driving shaft, drive second driving shaft 31 and clutch shaft bearing 32 rotations, because the effect of frictional force, the rotation of first outer ring 322 drives brake component 41 and moves to the direction that broadens, this moment, brake component 41 just became flexible (dotted line among Fig. 3 is represented the position of brake component 41 this moment), make the swing span 5 and first outer ring 322 break away from, also just make base plate 6 and swing span 5 break away from indirectly, so just can do freely with respect to the axis 311 of second driving shaft 31 and rotate so that be installed in base plate 6 on first outer ring 322, base plate 6 is done irregular orbital motion, and sander is then realized circle sand function.

Like this, the operator only needs selector switch button (motor forward and backward), just can realize very easily that the function of circle sand and plate sand is switched.Because swing span 5 rotates with respect to first driving shaft 21 all the time, that is to say no matter be when realizing circle sand or plate sand, its required moving component number can not change, the vibrations that produce in this two states just are the same, its barycenter can not change because the pattern of motion is different yet, so the counterbalance effect of this sander is fine under this two states.

Second embodiment of the present utility model and the first embodiment difference are: as shown in Figure 4, the second driving shaft 31a among the eccentric 3a is arranged at (as shown in Figure 6, offset or dish is e) among the fan 22a by clutch shaft bearing 32a off-centre.With the described second driving shaft 31a connects rolling bearing 9a arranged, one-way clutch 4a is arranged among the rolling bearing 9a, and design can effectively prevent dust like this, has to utilize the life-span of improving one-way clutch 4a.Swing span 5a connects by fixed cover 57a and rolling bearing 9a, and fixed cover 57a is a metal material, and 5a is rigidly connected with swing span.Base plate 6a connects on the second driving shaft 31a by pressing plate 61a (as shown in Figure 5), and in order to prevent base plate 6a rotation, this sander also is provided with brake circle 8a.

As shown in Figure 5, swing span 5a comprise the connecting portion 54a, the elasticity post 55a that are connected with housing 1a, with the rigidly connected detent 56a of fixed cover 57a, wherein elasticity post 55a is some rubber-like columns, two ends are connected with detent 56a with connecting portion 54a respectively, like this, swing span 5a is connected on the housing 1 with regard to elasticity.

As shown in Figure 6, rolling bearing 9a is provided with ball 91a, so just makes swing span 5a rotate with respect to the axis 211a of the first driving shaft 21a all the time.Rolling bearing 9a also is provided with the second inner ring 92a, the second outer ring 93a, wherein the second inner ring 92a and the second driving shaft 31a connect, the second outer ring 93a connects by fixed cover 57a and swing span 5a, and one-way clutch 4a is arranged between the second inner ring 92a and the second outer ring 93a.

As shown in Figure 7 and Figure 8, one-way clutch 4a comprises the boss 43a that connects with the second outer ring 93a, is provided with some along the circumferential direction equally distributed brake component 41a (being 6 in the present embodiment) and the flexible member 42a that connects with it (being spring in the present embodiment) at boss 43a.Wherein this brake component 41a is a voussoir, and the boss 43a and the second outer ring 93a can closely connect also and can connect together by frictionally, also is provided with 6 equally distributed groove 431a and accepting groove 432a on this boss 43a, and groove 431a links to each other with accepting groove 432a.Groove 451a is used for holding brake component 41a, and accepting groove 452a is used for accommodating spring 42a.Here, spring 42a is compressed all the time, and assurance brake component 41a's is in stable condition.

As shown in Figure 8, voussoir is irregularly shaped, the diagonal at its two ends is respectively A and C, and the spacing between the second inner ring 92a and the second outer ring 93a is B, and A＞B＞C, when the second inner ring 92a when E ' rotates (in this example for turning clockwise), brake component 41a is by locking, make the second outer ring 93a not relatively rotate, with the second driving shaft 31a relative fixed; When the second inner ring 92a when F ' rotates (in this example for being rotated counterclockwise), brake component 4a1 makes the second outer ring 93a to rotate not by locking, and at this moment one-way clutch 4a and rolling bearing 9a play the effect of general bearing together.

As shown in Figure 7 and Figure 8, work as touch switch, when motor rotates along first direction E ', when motor 2a (as shown in Figure 3) drives first driving shaft 21a rotation, drive fan 22a and clutch shaft bearing 32a rotation, thereby drive and then second rotating shaft 31a rotation of the second inner ring 92a, at this moment brake component 41a is by locking, make the second outer ring 93a not relatively rotate, with the second driving shaft 31a relative fixed, be in the same place thereby make swing span 5a connect with the second driving shaft 31a, also just make base plate 6a connect indirectly and be in the same place with swing span 5a, thereby generation brake force, limited base plate 6a and done freely with respect to the axis 311a of the second driving shaft 31a and rotate, because swing span 5a is that elasticity is connected with housing 1a, therefore, base plate 6a is merely able to do the orbital motion of rule, and sander is then realized plate sand function.

Work as touch switch, make motor when first direction F ' rotates, when motor 2a drives first driving shaft 21a rotation, drive fan 22a and clutch shaft bearing 32a rotation, thereby drive and then second driving shaft 31a rotation of the second inner ring 92a, at this moment brake component 41a makes the second outer ring 93a to rotate not by locking, and at this moment one-way clutch 4a and rolling bearing 9a play the effect of general bearing together.Like this, make the swing span 5a and the second driving shaft 31a break away from, just make indirectly that also base plate 6a and swing span 5a break away from.So, just can be so that being installed in base plate 6a on the second driving shaft 31a do freely with respect to the axis 311a of the second driving shaft 31a and rotate, base plate 6a does irregular orbital motion, and sander is then realized circle sand function.

Like this, the operator only needs selector switch button (motor forward and backward), just can realize very easily that the function of circle sand and plate sand is switched.

Equally, because swing span 5a rotates with respect to the first driving shaft 21a all the time, that is to say no matter be when realizing circle sand or plate sand, its required moving component number can not change, the vibrations that produce in this two states just are the same, its barycenter can not change because the pattern of motion is different yet, so the counterbalance effect of this sander is fine under this two states, operates very comfortable.

Claims

1. multifunction sander, comprise housing (1,1a), (1,1a) Nei motor is controlled the switch that described motor two-direction turns round to be installed in housing, by motor drive rotation first driving shaft (21,21a), and with first driving shaft (21, the eccentric that 21a) connects (3,3a), with eccentric (3, the base plate that 3a) connects (6,6a), and and housing (1,1a) (5,5a), wherein eccentric (3 for the swing span of elasticity connection, 3a) comprise with respect to described first driving shaft (21,21a) eccentric second driving shaft that is provided with (31,31a), it is characterized in that: also comprise being arranged at eccentric (3,3a) and swing span (5, one-way clutch 5a) (4,4a), when motor when first direction rotates, described one-way clutch (4,4a) make described swing span (5,5a) with described eccentric (3,3a) connect, to prevent described base plate (6,6a) with respect to second driving shaft (31, axis 31a) (311,311a) freely rotate; When motor when second direction is rotated, described one-way clutch (4,4a) make described swing span (5,5a) with described eccentric (3,3a) break away from described base plate (6,6a) can with respect to second driving shaft (31, axis 31a) (311,311a) freely rotate.

2. multifunction sander according to claim 1 is characterized in that: and described eccentric (3,3a) also comprise the clutch shaft bearing (32) that connects with described second driving shaft (31).

3. multifunction sander according to claim 2, it is characterized in that: described clutch shaft bearing (32) comprises first inner ring (321) that connects with second driving shaft (31) and first outer ring (322) that connects with base plate (6), also be provided with sliding bearing (53) between described first outer ring (322) and described swing span (5), described one-way clutch (4) is arranged in the described sliding bearing (53).

4. multifunction sander according to claim 3, it is characterized in that: described one-way clutch (4) comprises wedge-shaped slot (51), movably brake component (41) and the flexible member (42) that connects with described brake component (41), wherein said first outer ring (322) and described sliding bearing (53) have formed described wedge-shaped slot (51), and described brake component (41) and described flexible member (42) are contained in described wedge-shaped slot (51).

5. multifunction sander according to claim 4, it is characterized in that: when described motor when first direction rotates, drive described brake component (41) and move, make described first outer ring (322) and described swing span (5) connect to the narrower direction of described wedge-shaped slot (51); When described motor when second direction is rotated, drive described brake component (41) and move than cross direction to described wedge-shaped slot (51), make described first outer ring (322) and described swing span (5) break away from.

6. multifunction sander according to claim 1, it is characterized in that: rolling bearing (9a) arranged with described second driving shaft (31a) connects, described one-way clutch (4a) is arranged in the rolling bearing (9a), and described base plate (6a) connects with described second driving shaft (31a).

7. multifunction sander according to claim 6, it is characterized in that: described rolling bearing (9a) comprises second inner ring (92a), second outer ring (93a), described second inner ring (92a) connects with described second driving shaft (31a), described second outer ring (93a) connects with described swing span (5a), and described one-way clutch (4a) is arranged between second inner ring (92a) and second outer ring (93a).

8. multifunction sander according to claim 7, it is characterized in that: described one-way clutch (4a) comprises the boss (43a) that connects with described second outer ring (93a), the flexible member (42a) that connects of brake component (41a) and described brake component (41a) movably, described boss (43a) is provided with groove (431a) that holds described brake component (41a) and the accepting groove (432a) of accommodating described flexible member (42a), and described groove (431a) links to each other with described accepting groove (432a).

9. multifunction sander according to claim 8 is characterized in that: described brake component (41a) is a wedge.

10. multifunction sander according to claim 9 is characterized in that: when described motor when first direction rotates, described brake component (41a) is by locking, makes described second inner ring (92a) and described second outer ring (93a) relative fixed; When described motor when second direction is rotated, described brake component (41a) is by locking, makes described second inner ring (92a) and described second outer ring (93a) break away from.