CN218363903U

CN218363903U - Base for sheet type sander

Info

Publication number: CN218363903U
Application number: CN202190000188.3U
Authority: CN
Inventors: 朱玲燕; I·D·史密斯; M·A·马特洛克; J·S·沃特罗斯; R·A·帕特森; G·K·朗
Original assignee: Techtronic Cordless GP
Current assignee: Techtronic Cordless GP
Priority date: 2021-10-01
Filing date: 2021-10-01
Publication date: 2023-01-24
Anticipated expiration: 2031-10-01
Also published as: EP4182117B1; WO2023050451A1; EP4182117A1; EP4182117A4

Abstract

A base (25) for a sheet-type sander (10) includes a base (30) and a guide (60, 65). The bottom plate (30) has an upper side and a lower side opposite the upper side, and the upper side defines a guide mounting portion (40, 45). The guides (60, 65) are coupled to the guide mounting portions (40, 45) near edges of the base plate (30), and an upper side of the base plate (30) and the guides (60, 65) cooperate to define a space that receives and temporarily holds an end of the polishing sheet (26). The base (25) further includes a clamp (53, 55), the clamp (53, 55) being coupled to the base plate (30) and being movable between an undamped position, in which the polishing pad (26) is allowed to connect to the base plate (30) via the guides (60, 65), and a clamped position, in which the polishing pad (26) is secured to the base plate (30). After the sanding sheet (26) is positioned in the space, the clamps (53, 55) are in a clamped position.

Description

Base for sheet-type sander

Technical Field

The present disclosure relates to power tools and, more particularly, to battery powered sanders.

Background

The grinding mill generally comprises: a housing; a motor supported by the housing, the motor coupled to a drive shaft, the drive shaft driven to rotate about a drive axis; and an assembly or base for mounting a pad or sandpaper for abrading a work surface. Such a grinder may be used for a rough grinding process or a fine grinding process depending on the properties of a pad, a coated abrasive, and a machine.

Disclosure of Invention

In one aspect, the present disclosure provides a base for a sheet sander including a base plate and a guide. The bottom plate has an upper side and a lower side opposite the upper side, and the upper side defines a guide mounting portion. The guides are coupled to the guide mounting portion near an edge of the base plate, and the upper side of the base plate and the guides cooperate to define a space that receives and temporarily holds an end of the sanding sheet. The base further includes a clamp coupled to the base plate and movable between an undamped position allowing the sanding sheet to be connected to the base plate via the guide and a clamped position securing the sanding sheet to the base plate. After the sanding sheet is positioned within the space, the clamp is in a clamped position.

In one aspect, the guide includes a base portion coupled to the floor and a flange extending from the base portion. The base portion lies in a plane and the flange is oriented at a non-zero angle relative to the base portion.

In one aspect, the guide mount defines a post, and the base portion is attached to the floor via the post, and an end of the base portion defines a hook extending below an uppermost portion of the post. The hook portion defines a clamp pivot that allows the clamp to move between an undamped position and a clamped position.

In one aspect, the guide includes a transition portion disposed between the base portion and the flange and extending below a plane of the base portion. The flange controls movement of the end of the sanding sheet towards the transition portion, and the transition portion frictionally retains the sanding sheet between the guide mounting portion and the guide.

In one aspect, the space between the guide and the upper side of the floor plate is tapered from the end of the flange toward the base portion.

In another aspect, the present disclosure provides a base for a sheet sander including a base plate having an upper side defining a first guide mounting portion located near a first corner of the base plate and a second guide mounting portion located near a second corner of the base plate. The first corner and the second corner share an edge of the bottom panel. The base also includes a first guide, a second guide, and a clamp. The first guide is coupled to the first guide mounting portion near an edge of the base plate, and the upper side of the base plate and the first guide cooperate to define a first tapered space, and the first guide receives and temporarily retains an end of the polishing pad within the first tapered space. The second guide is coupled to the second guide mounting portion near an edge of the bottom plate, and an upper side of the bottom plate and the second guide cooperate to define a second tapered space. The second guide receives and temporarily holds an end of the polishing sheet in the second tapered space. The clamp is coupled to the base plate and has an undamped position and a clamped position. The undamped position allows the sanding sheet to be attached to the base plate via the first and second guides, and the clamped position secures the sanding sheet to the base plate.

In one aspect, the first guide includes a first base portion coupled to the floor and lying within a plane, and a first flange extending from the first base portion and oriented at a non-zero angle relative to the first base portion. The second guide includes a second base portion coupled to the floor and lying within the plane, and a second flange extending from the second base portion and oriented at a non-zero angle relative to the second base portion.

In one aspect, the first guide mount defines a post, the first base portion is attached to the post, and an end of the first base portion defines a hook extending below an uppermost portion of the post. The hook portion defines a clamp pivot that allows the clamp to move between an undamped position and a clamped position.

In one aspect, the first guide includes a first transition disposed between the first base portion and the first flange and extending below a plane of the first base portion, and the second guide includes a second transition disposed between the second base portion and the second flange and extending below a plane of the second base portion. The first and second flanges control movement of the ends of the sanding sheet toward the first and second transition portions, respectively, and the first and second transition portions are configured to frictionally retain the sanding sheet between the first and second guide mounting portions and the first and second guides, respectively.

Drawings

The present disclosure now will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the disclosure are shown. However, the present disclosure should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Like numbers refer to like elements throughout.

FIG. 1 is a perspective view of a sheet sander embodying the present disclosure.

Fig. 2 is an exploded view of a sheet sander including a housing and a base assembly.

Fig. 3 is a perspective view of a base assembly including a base plate, a clamp, and a sheet guide.

Fig. 4 is a top view of the base assembly of fig. 3.

Fig. 5 is an end view of the base assembly of fig. 3.

Fig. 6A is a side view of the base assembly of fig. 3.

Fig. 6B is another side view of the base assembly of fig. 3.

Figure 7 is a perspective view of a portion of a base portion assembly including a clamp, a guide, and a sanding sheet retained by the guide and prior to clamping.

Fig. 8A is a perspective view of one guide.

Fig. 8B is a perspective view of another guide.

Fig. 9A is a side view of the guide of fig. 8A.

Fig. 9B is a side view of the guide of fig. 8B.

Fig. 10A is a rear view of the guide of fig. 8A.

Fig. 10B is a rear view of the guide of fig. 8B.

Fig. 11A is a top view of the guide of fig. 8A.

Fig. 11B is a top view of the guide of fig. 8B.

Before any embodiments of the disclosure are explained in detail, it is to be understood that the disclosure is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The disclosure is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting.

Detailed Description

For simplicity and illustrative purposes, the present disclosure is described primarily with reference to exemplary embodiments thereof. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure. It will be apparent, however, to one skilled in the art that the present disclosure may be practiced without limitation to these specific details.

Fig. 1 and 2 illustrate an exemplary sander 10 embodying the present disclosure, including a housing 15, a battery pack 20, and a base 25 that supports a sanding sheet 26 (fig. 7). The housing 15 includes a handle portion 27, the handle portion 27 being shaped to be grasped by a hand of a user. The sander 10 may also include a wired power source instead of the battery pack 20. Although not shown, it is understood that the sander 10 includes an electric motor that rotates a drive shaft that extends along an axis of rotation and rotates in response to torque from the electric motor to rapidly move the base 25 in an abrasive motion by transmitting power through an output shaft (not shown). The battery pack 20 is removably attached to the housing 15 via a battery receptacle 28 to power the motor. The dust collecting portion may be formed integrally with the housing 15 to facilitate collection of dust during operation. Referring to FIG. 1, the sander 10 further includes a push button switch 29 to energize and de-energize the sander 10.

Referring to fig. 1-3, a base 25 is attached to the underside of the housing 15 and is operatively coupled to the drive shaft. As shown, the base 25 includes an upper plate 30 and a lower plate 35 attached to the upper plate 30. In some embodiments, the upper plate 30 and the lower plate 35 may be a unitary structure such that the base has a single plate. The upper plate 30 defines an upper side of the base 25, and the lower plate 35 defines a lower side of the base 25. The upper and

lower base plates

30, 35 cooperatively support the polishing pad 26 (FIG. 7) and, during operation of the sander 10, the underside faces the workpiece (not shown).

As best shown in fig. 2 and 3, the upper and

lower base plates

30, 35 cooperatively define corners 36 with two

end edges

37a, 37b and two

side edges

38a, 38 b. The upper base plate 30 has a lip 39 extending along each

end edge

37a, 37 b. The upper base plate 30 also includes a first guide mounting portion located adjacent the first corner 36a, and a second guide mounting portion 45 located adjacent the second corner 36b, the second corner 36b sharing an end edge 37a with the first corner 36 a. It should be understood that the upper floor 30 may also include guide mount portions on the corners at the end edges 37 b. Referring to fig. 3, 6A and 6B, the first guide mount 40 is defined by a post 46 and the second guide mount 45 is defined by a post 47. As shown in fig. 2, 6A, 6B, each

post

46, 47 extends upwardly from the upper floor 30. Each

guide mounting portion

40, 45 is also shown to have an angled

portion

48a, 48b facing end edge 37a, and a

hole

49a, 49b. The clamping channels 53a, 53b extend along the

respective end edges

37a, 37b in the vicinity of the lip 39.

Referring to fig. 2 to 7, the base 25 further includes a first clamp 53, a second clamp 55, a first guide 60, and a second guide 65. As shown, a first clamp 53 extends along one end edge 37a and one side edge 38a, and a second clamp 55 extends along the other end edge 37b and the other side edge 38b to semi-permanently clamp or secure an end of the polishing pad 26 to the base 25 for performing a polishing operation (e.g., until the polishing pad 26 needs to be replaced). The

clips

53, 55 have the same shape and include a clip connector end 57, the clip connector end 57 being pivotably coupled to the upper floor 30 (e.g., the clip 53 being pivotably coupled to the post 46). The

clip

53, 55 also includes a clip arm 58 disposed in the clip channel 50a or 50b, and a clip gripping portion 59 on an end distal from the clip connector end 57.

As shown in fig. 3-7, the first guide member 60 is coupled to the post 46 near the end edge 37a at the corner 36, and the second guide member 65 is coupled to the post 47 near the end edge 37a at the adjacent corner 36. Each

guide

60, 65 is shown attached to a

respective post

46, 47 by a fastener 67 (e.g., a rivet, screw, bolt, etc.), the fastener 67 extending through a

respective guide hole

68, 69 in the

guide

60, 65. It should be understood that the

guides

60 and 65 may be welded to the upper base plate 30 or otherwise integrally formed with the upper base plate 30.

Referring to fig. 8A-11B, first guide 60 includes a first base portion 70, and a first flange 75, first base portion 70 being coupled to post 46 and lying within plane 72, first flange 75 extending from first base portion 70 and being oriented at a non-zero angle with respect to first base portion 70 (i.e., with respect to plane 72). A first transition 77 is provided between the first base portion 70 and the first flange 75, and the transition 77 extends from the first base portion 70 below the plane 72. The end of the first base portion 70 has a hook 78 to help maintain the first guide 60 in alignment on the post 46 so that the first guide 60 can receive the end of the sanding sheet 26.

Second guide 65 includes a second base portion 80 coupled to post 47 and lying within plane 82, and a second flange 85 extending from second base portion 80 and oriented at a non-zero angle relative to second base portion 80 (i.e., relative to plane 82). A second transition 87 is provided between the second base portion 80 and the second flange 85, and the transition 87 extends from the second base portion 80 below the plane 82. One end of the second base portion 80 has a hook 90 defining a clip pivot that is complementary to the pivotal movement of the clip 53 provided by the post 46. Referring to fig. 8A and 11A, the second guide 65 may include a support pin recess 95, and the support pin recess 95 is engaged by a support pin 100 on the upper plate 30 to inhibit rotation or twisting of the second guide 65.

As best shown in fig. 6A and 6B, the first guide 60 and an upper side of the base plate 30 (e.g., the first guide mounting portion 40) cooperatively define a first space 105 for receiving an end of the abrasive sheet 26. Also, the second guide 65 and the upper side of the base plate 30 (e.g., the second guide mounting portion 45) cooperatively define a second space 110. As shown in the illustrated embodiment, each

space

105, 110 is defined as a tapered space due to the

inclined portions

48a, 48b provided on the

guide mounting portions

40, 45, respectively.

The first and

second guides

60, 65 cooperatively receive and temporarily hold the ends of the abrasive sheet in place on the base 25 such that the

clamps

53, 55 can then be actuated from an undamped position (shown in fig. 3-7) to a clamped position (shown in fig. 1) to secure the abrasive sheet 26 to the base 25. For example, attaching the sanding sheet 26 to the base 25, the user slides the ends of the sanding sheet 26 into the

spaces

105, 110 when the clamp arm 58 (and typically the clamps 53, 55) are in the undamped position. That is, the end of the sanding sheet 26 slides under the clamp arm 58. In some embodiments, the second clamp 55 may secure one end of the sanding sheet 26 prior to aligning the other end of the sanding sheet 26 with respect to the

guides

60, 65. When the ends of the grinding plate 26 near the first and

second guides

60, 65 are inserted into the first and

second spaces

105, 110, the first and

second flanges

75, 85 control the movement of the ends of the grinding plate 26 toward the first and

second transition portions

77, 87, respectively. The first transition 77 and the second transition 87 retain the sanding sheet between the first and second

guide mounting portions

40, 45 and the first and

second guides

60, 65, respectively, by friction.

After the ends of the polishing sheet 26 are retained in the first and

second spaces

105, 110 by the

guides

60, 65, the first clamp 53 can be manipulated to move from the undamped position to the clamped position to secure the polishing sheet 26 to the end edge 37a. The user may also manipulate the second clamp 55 to secure the other end of the tab 26 along the end edge 37b if the second clamp 55 is not already secured in the clamped position. The lip 39 helps to retain and secure the tab 26 so that the tab 26 is held against the underside of the lower plate 35. Securing the

clamps

53, 55 in the clamped position may semi-permanently lock the sheet 26 in place. Movement of the

clamps

53, 55 back to the undamped position allows the user to replace the polishing pad 26. In general, the

guides

60, 65 and clamps 53, 55 provide a two-step sheet mounting process that facilitates i) aligning and retaining the sheet 26 on the base 25, and ii) fixedly attaching the sheet 26 to the base 25, such that the sander 10 can be used on a workpiece.

The above detailed description is merely illustrative in nature and is not intended to limit the disclosure or the application and uses of the disclosure. Furthermore, there is no intention to be bound by any expressed or implied theory presented in the preceding field of use, background, summary or the detailed description. Although the present disclosure has been described in detail with reference to certain preferred embodiments, variations and modifications exist within the scope and spirit of one or more independent aspects of the present disclosure as described.

Claims

1. A base for a sheet-type sander, the base comprising:

a base plate including an upper side and a lower side opposite the upper side, the upper side defining a guide mounting portion;

a guide coupled to the guide mounting portion near an edge of the base plate, the upper side of the base plate and the guide cooperating to define a space, the guide configured to temporarily receive and retain an end of a sanding sheet within the space; and

a clamp coupled to the base plate and movable between an undamped position and a clamped position, the clamp configured to: allowing the sanding sheet to be attached to the base plate via the guide in the undamped position, securing the sanding sheet to the base plate in the clamped position,

wherein the clamp is in a clamped position after the sanding sheet is positioned within the space.

2. The susceptor of claim 1, wherein the guide includes a base portion coupled to the bottom plate and a flange extending from the base portion, and wherein the base portion lies within a plane and the flange is oriented at a non-zero angle relative to the base portion.

3. The base of claim 2, wherein the guide mount defines a post and the base portion is attached to the floor via the post, wherein an end of the base portion defines a hook extending below an uppermost portion of the post, and wherein the hook defines a clamp pivot configured to allow the clamp to move between the undamped and clamped positions.

4. The pedestal of claim 2, wherein the guide comprises a transition portion disposed between the base portion and the flange and extending below a plane of the base portion.

5. The base of claim 4, wherein the flange is configured to control movement of an end of the lapping sheet toward the transition portion, and wherein the transition portion is configured to frictionally retain the lapping sheet between the guide mounting portion and the guide.

6. The susceptor of claim 5, wherein the space between the guide and the upper side of the bottom plate is tapered from an end of the flange toward the base portion.

7. The base of claim 1, wherein the floor includes a lip extending upwardly from the upper side, and wherein the lip cooperates with the clamp to secure the sanding sheet to the floor.

8. The base of claim 1, wherein the guide includes an aperture and a fastener extending through the aperture to attach the guide to the guide mount.

9. A base for a sheet-type sander, the base comprising:

a base plate including an upper side and a lower side opposite the upper side, the upper side defining a first guide mount proximate a first corner of the base plate and a second guide mount proximate a second corner of the base plate, the first and second corners sharing an edge of the base plate;

a first guide coupled to the first guide mounting portion near an edge of the base plate, the upper side of the base plate and the first guide cooperating to define a first tapered space, the first guide configured to receive and temporarily retain an end of the polishing pad within the first tapered space;

a second guide coupled to the second guide mounting portion near an edge of the base plate, the upper side of the base plate and the second guide cooperating to define a second tapered space, the second guide configured to receive and temporarily retain an end of the polishing sheet within the second tapered space; and

a clamp coupled to the base plate and having an undamped position and a clamped position,

wherein the clamp is configured to: in the undamped position, the sanding sheet is allowed to attach to the base plate via the first and second guides, and the clamped position secures the sanding sheet to the base plate.

10. The pedestal of claim 9, wherein the first guide includes a first base portion coupled to the floor and lying within a plane, and a first flange extending from the first base portion and oriented at a non-zero angle relative to the first base portion, and wherein the second guide includes a second base portion coupled to the floor and lying within a plane, and a second flange extending from the second base portion and oriented at a non-zero angle relative to the second base portion.

11. The base of claim 10, wherein the first guide mount defines a post to which the first base portion is attached, wherein an end of the first base portion defines a hook extending below an uppermost portion of the post, and wherein the hook defines a clamp pivot configured to allow the clamp to move between the undamped position and the clamped position.

12. The pedestal of claim 10, wherein the first guide comprises a first transition disposed between the first base portion and the first flange and extending below a plane of the first base portion, and wherein the second guide comprises a second transition disposed between the second base portion and the second flange and extending below a plane of the second base portion.

13. The base of claim 12, wherein the first and second flanges are configured to control movement of the ends of the sanding sheet toward the first and second transition portions, respectively, and wherein the first and second transition portions are configured to frictionally retain the sanding sheet between the first and second guide mounts and the first and second guides, respectively.

14. The base of claim 9, wherein the floor includes a lip extending upwardly from the upper side, and wherein the lip cooperates with the clamp to secure the sanding sheet to the floor.