WO2013091264A1

WO2013091264A1 - Sanding tool protecting device

Info

Publication number: WO2013091264A1
Application number: PCT/CN2011/084997
Authority: WO
Inventors: 吴明厅
Original assignee: 上海锐奇工具股份有限公司
Priority date: 2011-12-19
Filing date: 2011-12-30
Publication date: 2013-06-27
Also published as: CN202367597U

Abstract

A sanding tool protecting device comprises a protecting cover (1), a protecting cover hold hoop (3), a front cover (4), an O-shaped ring (5) and a screw (6). The protecting cover hold hoop is disposed below the protecting cover through the screw. An upper end of the front cover is disposed in the protecting cover and a center hole of the protecting cover hold hoop. The O-shaped ring is disposed in a predetermined groove located at a lower end of the front cover. A pull-pin type elastic locking mechanism is disposed in the protecting cover hold hoop and is composed of a brake member (2) and a torsion spring (8). The tail end of the torsion spring is connected to the brake member. One end of the brake member is disposed outside the protecting cover hold hoop, and the other end of the brake member is disposed in a groove of the front cover. A scale division member (7) is disposed in the protecting cover hold hoop. An operator can implement assembly and disassembly of the protecting cover, angle adjustment and locking operations by simply pulling or releasing the brake member in the pull-pin type elastic locking mechanism without using any tool. Therefore, the sanding tool protecting device is convenient to operate and simple in structure.

Description

Sanding tool protection pro

Technical field

The utility model relates to a sanding tool protection device, which is mainly used for providing a protection function for a sanding tool, and can realize rapid clamping without any tools, and belongs to the technical field of tools. Background technique

A number of sanding tools are currently equipped with a protective device, such as the one disclosed in EP 2119534 A1, which is particularly suitable for use in an angle grinder. The structure is: The protective cover rotates around the axis of the power tool within a limited range. It can be in different working positions and consists of the following parts: a housing with a fan-shaped bottom wall, a plurality of limiting blocks arranged coaxially on the bottom wall along a fan-shaped arc, which are paired with the counter-limit block on the power tool to protect The cover is in the selected working position, and in order to limit the movement, at least one axially extending stop in the semi-arc circumferential direction, the stop can move relatively opposite the limit position, characterized in that: the stop forms a slit A partially curved outwardly extending leg is mounted thereon so that the counter stop can be inserted into the slit.

Another example is an explosion-proof protective cover for an angle grinder disclosed in CN 201792264 U. The structure is: comprising a front cover mounted on the machine and a shield body disposed on the front cover, wherein: The front part of the cover is provided with a round table on which the protective cover body is mounted, and the rear end of the protective cover body is provided with a holding card and hung on the round table and is tightly connected by a fastener, and a rotation angle of the protective cover body is arranged between the holding card and the round table. Limit structure. The limiting structure comprises a pin point protruding from the inner side surface of the holding card and a limiting pin corresponding to the card point disposed on the side of the round table, and a pin hole for inserting the limiting pin is arranged on the side of the round table. A ring groove for placing a card point is arranged on the side of the round table, and the pin hole is disposed in the ring groove. After the limit pin is inserted into the pin hole, the top end of the limit pin extends beyond the bottom surface of the ring groove and does not extend beyond the side of the ring table. The limit pin is a spring pin, the fastener is a bolt and a nut, and the two ends of the card are provided with a connecting head, and the connecting head is provided with a through hole for wearing the bolt.

A hand-held electric machine with a protective cover as disclosed in the patent document DE 10343060 A1, having the following structure: an angle grinder having a housing for mounting a motor to drive a rotating shaft disposed at an angle to the housing, the shaft being placed Rotating inside a gear box, the free end of which can be equipped with a grinding tool, wherein the protective cover surrounding the grinding tool is rotatably mounted on the gear box, and its rotating position is locked by a fixed locking bar, which is characterized by: fixed locking bar It is arranged obliquely with the grinding tool and is rotatable about an axis parallel to the housing.

A hand-held power tool as disclosed in US 2009/0029635, the structure of which is: With a sheet-like turning tool, the hand tool comprises a flanged casing or a neck, a protective cover having a neck of the shield or a neck of the protective neck, and an annular hoop thereon, The hoop can be tightened with a tool. A lock block that prevents rotation is inserted between the shield and the neck to form a special structure, characterized in that the tightening tool can be brought into contact with the neck several times in its wrapped position in its released position. No longer maintains the shape of the neck.

A power tool for driving a wheeled disc or a cutting blade, as disclosed in US Pat. No. 5,766,062, the structure of which comprises: a housing, a rotary output spindle with a flange supporting the blade, and a guide in the housing a positionally adjustable shield on the flange and a brake device for determining the working position, the function of which is to actively insert a locking hole in the shield to lock the latter in a position selectable relative to the housing, wherein the support flange has a plurality of circumferential zigzag notches, and the braking device includes a locking bolt that is movable between the first position in the longitudinal direction for insertion into any of the locking holes in the shield, and in the second position, it can be inserted into the shield The lock hole and any serrated notch on the support flange, in the third position, it disengages any of the lock holes on the shield and any zigzag notch on the support flange, the spring device is used to lock the bolt Go back to the first position.

Finally, as disclosed in Patent No. KR201000045254, a polishing machine with a rotating protective cover has the following structural features: a packing gland comprising a base and a connecting member, wherein the connecting member is arranged with a locking sleeve in a circumferential direction; A working disc powered by a drive member, a movable and rotating coupling hoop on the outer circumference of the packing gland, a protective cover mounted above the disc to protect the operator, and a protective cover in the tianlian gland A fixed or moving switch piece.

The handling and angle adjustment of most of the above-mentioned guards must be done by means of tools, and even without the need for tools, the structure is relatively complicated, resulting in an increase in manufacturing costs and daily maintenance costs. Summary of the invention

The purpose of the utility model is to provide a sanding tool protection device, which can realize the functions of simple protection and can complete the loading and unloading and angle adjustment of the protective cover without any tools.

In order to achieve the above object, the technical solution of the present invention provides a sanding tool protection device, including a protective cover, a shroud hoop, a front cover, a 0-ring and a screw, and the shroud hoop is disposed on the protective cover by a screw. Below, the upper end of the front cover is disposed in the central hole of the shield and the shroud hoop, and the 0-ring is disposed in a predetermined slot at the lower end of the front cover, wherein the pull-type elastic locking mechanism is disposed on the shroud of the shroud The pull-type elastic locking mechanism is composed of a brake member and a torsion spring, and a tail end of the torsion spring is connected with the brake member, and one end of the brake member is disposed on the shield Outside the hoop, the other end is disposed in the groove of the front cover, and the indexing piece is arranged in the hoop of the shroud.

The utility model replaces the traditional bolt with the pull pin type elastic locking mechanism to realize the control of the guard hoop, that is, the operation of loading and unloading the shield and adjusting the angle.

The utility model has the advantages that the operator can realize the operation of loading, unloading, adjusting the angle and locking of the protective cover by the simple operation of pulling and loosening the braking member in the pull-type elastic locking mechanism, without any tools, operation Convenient and simple. At the same time, through the buffering action of the 0-ring, the impact of the vibration on the shroud of the shroud is reduced, the possibility of deformation of the shroud of the shroud is reduced, and the reliability is improved. DRAWINGS

Figure 1 is a side elevational view of a sanding tool guard;

2 is a schematic plan view showing a structure of a sanding tool guard when the brake member is locked;

Figure 3 is a top plan view of a sanding tool guard when the brake is released;

Figure 4 is a top plan view of the sanding tool guard after the brake is removed. detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

The utility model provides a sanding tool protection device, as shown in Fig. 1, comprising a protective cover 1, a brake member 2, a shield hoop 3, a front cover 4, an O-ring 5, a screw 6, and an indexing member 7 And torsion spring 8. The shroud hoop 3 is fixed under the protective cover 1 by means of a screw 6, and the protective cover 1 is fitted into the front cover 4 together with the shroud hoop 3, and the O-ring 5 is fitted at the same time, so that the protective cover is fitted to the front cover 4. Scheduled in the slot. The pull-type elastic locking mechanism and the indexing member 7 composed of the brake member 2 and the torsion spring 8 are housed in the shield hoop 3 except that one end of the brake member is exposed to the shroud hoop 3.

As shown in Fig. 4, the torsion spring 8 is embedded in the shroud hoop 3, and one end of the torsion spring 8 is fixed to the brake member 2, and the end of the brake member 2 is inserted into the corresponding recess of the front cover 4. The indexing member 7 is also embedded in the shroud hoop 3, and when the detent member 2 is inserted into the recess of the front cover 4, the indexing member 7 enters the corresponding recess of the front cover 4.

When assembling, as shown in FIG. 2, the protective cover 1, the brake member 2, the indexing member 7, the torsion spring 8 and the like are fastened to the front cover 4 by the screws 6 to fasten the components such as the cover hoop 3 and the like. The groove is correspondingly assembled into the front cover 4, and the indexing member 7 also corresponds to the predetermined groove of the front cover 4; when in use, as shown in FIG. 3, the pulling brake member 2 is exposed outside the shield hoop 3 One end of the brake member 2 is separated from the groove of the front cover 4, and then can be turned The movable protective cover 1 realizes free rotation within 0° - 270°. In each protective position, the indexing member 7 will be caught in the preset groove of the front cover 4 to serve as a wake-up function, and if rotated to a desired position, loose The opening brake member 2 causes one end of the braking member 2 to be caught in the groove on the front cover 4 to complete the assembly operation. When disassembling, the brake member 2 is pulled out of the groove of the front cover 4, and then rotated to the position at the time of assembly to be taken out from the front cover 4. The entire assembly, disassembly and angle adjustment can be achieved without the need for additional tools.

The indexing member 7 enters or leaves the groove on the front cover 4 as the brake member 2 enters or leaves the recess of the front cover 4, whether during assembly, disassembly or adjustment of the angle. To remind the operator that the brake member 2 has been rotated to a positioning point, and the 0-ring 5 provides a certain damping effect between the shroud hoop 3 and the front cover 4, improving stability.

Claims

Rights request:

1. A sanding tool guard, including a protective cover (1), a shroud (3), a front cover (4), a 0-ring (5) and a screw (6), a shroud (3) The screw (6) is disposed under the shield (1), and the upper end of the front cover (4) is disposed in the central hole of the shield (1) and the shield hoop (3), and the 0-ring (5) is disposed at The predetermined groove at the lower end of the front cover (4) is characterized in that the pull pin type elastic locking mechanism is disposed in the shield hoop (3).

2. The sanding tool guard according to claim 1, wherein the pull-type elastic locking mechanism is composed of a braking member (2) and a torsion spring (8), and the torsion spring (8) The rear end is connected to the brake member (2), the brake member (2) is disposed outside the shield hoop (3), and the other end is disposed in the recess of the front cover (4).

3. A sanding tool guard according to claim 1, characterized in that the shield hoop (3) is provided with an indexing member (7).