TWI593506B - Rotatable positioning of the handheld power belt machine - Google Patents

Description

Rotatable positioning hand-held power belt machine

The invention relates to a hand-held power belt machine, in particular to a hand-held power belt machine which is rotatably positioned.

The existing hand-held power belt machine can more easily perform sanding on a relatively narrow processing part such as a groove or an inner hole, and allows a belt mounting portion to rotate relative to a body portion and through a rotary positioning. A device secures an angle between the belt mounting portion and the body portion.

At present, the rotary positioning device is to increase the friction between the belt mounting portion and the body portion by locking the bolt, thereby preventing the angle between the two from changing during the processing. For example, a lever bolt as disclosed in Fig. 1 of Japanese Patent No. 4017348, or a jaw tightening method as disclosed in Fig. 1 of Japanese Patent No. 4,154,393.

However, these bolts for locking may be loosened during the machining process due to running vibrations, posing an operational hazard. In addition, the rotary positioning device also lacks a mechanism for the belt mounting portion to be stably restrained in the body portion in the axial direction, so that the belt mounting portion is detached from the body portion.

Accordingly, it is an object of the present invention to provide a hand held power belt machine that is stably constrained and rotatably positionable.

Therefore, the rotatably positioned hand-held power belt machine of the present invention comprises a casing, a boom, a grinding device, a limiting device, and a positioning device.

The casing includes a head and a grip. The head has a pivot that surrounds an axis and includes a port.

The boom extends transversely to the axis and includes a proximal end and a distal end. The proximal portion has a sleeve that is pivoted over the pivot.

The grinding device comprises a driving member disposed on the head, a driving wheel driven by the driving member, protruding from the port, a driven wheel pivoted on the distal end, and a winding around the active The wheel and the belt of the driven wheel.

The limiting device includes a ring groove recessed in the pivot seat, and a plurality of protrusions disposed on the sleeve and slidably embedded in the ring groove. The limiting device is configured to prevent the boom from disengaging the head in the axial direction.

The positioning device includes a plurality of slots disposed around the axis and disposed on one of the pivot seat and the sleeve, and a block movably disposed on the other of the pivot seat and the sleeve. When the card block is engaged in one of the card slots, the arm frame is positioned in a processed state relative to the head; when the card block is operated away from the card slots, the arm frame is rotatable relative to the head portion.

The effect of the invention is that the lugs are slidably embedded in the annular groove, so that the arm can be effectively prevented from disengaging the head on the axis. Further, since the mechanical connection between the block and the card slots is fitted, the connection strength can be improved, and the chance of loosening due to the vibration of the operation of the polishing device can be effectively reduced.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 1 and FIG. 4, a first embodiment of a rotatably positionable hand-held power belt machine of the present invention comprises a casing 100, a boom 200, a grinding device 300, a limiting device 400, and a positioning device. 500.

Referring to FIG. 2, the casing 100 includes a head 110 and a grip 120. The head 110 has a pivot seat 111 that surrounds an axis L. The pivot base 111 includes a port 113 and an assembly slot 114 extending parallel to the axis L.

Referring to FIGS. 1 and 3, the boom 200 extends along a transverse direction T intersecting the axis L and includes a proximal end portion 210 and a distal end portion 220. The proximal portion 210 has a sleeve 211 that is pivoted over the pivot seat 111 and includes a consistent aperture 212.

Referring to FIG. 1 , FIG. 2 and FIG. 7 , the grinding device 300 includes a driving component 310 disposed on the head 110 , a driving wheel 320 driven by the driving component 310 , and protruding from the port 113 . The driven wheel 330 of the distal end portion 220, the abrasive belt 340 disposed around the driving wheel 320 and the driven wheel 330, and a battery 350 and a switching circuit 360 disposed on the grip 120. In this embodiment, the driving component 310 is a motor, and the switching circuit 360 is used to turn on or block the power supply circuit between the driving component 310 and the battery 350.

Further, the switch circuit 360 has a controller 361, and an active switch 362 and a safety switch 363 that are connected to the controller 361. The actuation switch 362 can output a start signal to the controller 361 through a trigger member 364 disposed on the grip 120 and pressed by the user. In addition, the safety switch 363 includes a trigger member 365 located on the arm frame 200 and a sensing member 366 located on the grip 120. It should be noted that the safety switch 363 is touched or sensed through the triggering member 365, thereby triggering the sensing component 366 to output a control signal to the controller 361. Therefore, in the embodiment, the safety switch 363 is in the form of a magnetic induction trigger, and the magnet and the Hall sensor are respectively used as the trigger member 365 and the sensing member 366, but should not be used. To this end, other types of switches such as a reed switch or a limit switch can also be used.

Referring to FIG. 2 and FIG. 3, the limiting device 400 includes a ring groove 410 recessed in the pivot seat 111, and two protrusions 420 disposed on the sleeve 211 at 180 degrees along the lateral direction T, respectively. In this embodiment, the ring groove 410 is in communication with the assembly groove 114; and, wherein a protrusion 420 is fixedly protruded from the sleeve 211 toward the axis L, and another protrusion 420 is along the lateral direction T. And being slidably disposed on the sleeve 211 and fixed to the sleeve 211 through a bolt 421. In this embodiment, the trigger member 365 is disposed on the slideable bump 420.

Referring to FIG. 4 and FIG. 5, when the sleeve 211 of the boom 200 is to be assembled to the pivot seat 111 of the casing 100, the protrusion 420 that can slide on the sleeve 211 is first adjusted away from the axis L ( As shown by a small chain arrow A in FIG. 5, the bump 420 fixed to the sleeve 211 is aligned with the assembly groove 114, and then slides along the assembly groove 114 to the ring groove 410. Next, the bump 420 that can slide on the sleeve 211 is pushed into the ring groove 410 toward the axis L (as indicated by the solid arrow B in FIG. 5), and is fixed by the bolt 421. In this way, the bumps 420 can be slidably embedded in the annular groove 410, and the boom 200 can be prevented from being disengaged from the head 110 in the direction of the axis L. Meanwhile, as shown in FIG. 4, the boom 200 is rotatable relative to the head 110 in a first direction D1 and a second direction D2 opposite to the first direction D1.

Referring to FIG. 2 and FIG. 4 , the positioning device 500 includes a plurality of slots 510 recessed in the pivot base 111 and a receiving slot 520 located on one side of the card slots 510 , and is movably disposed. The block 530 of the through hole 212 and an elastic member 540 for causing the block 530 to be embedded in the card slots 510. Each of the card slots 510 is defined by a slot bottom surface 511 , a first blocking surface 512 , and a second blocking surface 513 . The block 530 has a control key 531 located outside the sleeve 211 and a meshing tooth 532 located in the sleeve 211. In this embodiment, the block 530 is swingably pivoted to the through hole 212. The return spring force of the elastic member 540 causes the block 530 to oscillate in the second direction D2.

It should be noted that, in this embodiment, the angle between the first stop surface 512 and the groove bottom surface 511 of each of the card slots 510 is between 60 degrees and 85 degrees, which is 75 degrees in this embodiment. . The angle is designed such that the user mistakenly pulls the arm frame 200 in the first direction D1 when the control button 531 is not pressed, and the meshing teeth 532 do not slip off the card slots 510. In addition, in order to prevent the bumps 420 from being respectively removed by the card slots 510; therefore, the circumferential width of the card slots 510 is smaller than the circumferential width of each of the bumps 420.

In addition, since the card slots 510 and the engaging teeth 532 are substantially concave and convex, the corresponding positions of the card sockets 111 and the sleeves 211 are interchangeable, that is, the card slots 510 are disposed in the sleeve. The barrel 211 and the meshing teeth 532 are mounted on the pivot base 111. However, such an embodiment must pass through a relatively complicated mechanism so that the control key 531 that drives the meshing teeth 532 can be exposed, but can still be used as an embodiment of the positioning device 500.

Therefore, when the user presses the control button 531, the meshing teeth 532 will pivot away from the card slots 510, so that the arm frame 200 can penetrate the sleeve 211 and the pivot base 111, and the opposite The head 110 is rotated. When the user adjusts the angle of the boom 200 relative to the head 110, the control button 531 is released, so that the elastic force of the elastic member 540 acts on the control button 531 to drive the engaging teeth 532 to be inserted. In one of the card slots 510. At this time, the engaging teeth 532 abut against the first stopping surface 512 of the slot 510 to prevent the boom 200 from rotating toward the first direction D1; the engaging teeth 532 abut against the second blocking surface 513 In order to prevent the boom 200 from rotating in the second direction D2, the boom 200 is positioned in a processed state relative to the head 110. In addition, as shown in FIG. 6, when the user wants to accommodate the rotatably positioned hand-held power belt machine of the present invention, the boom 200 can be rotated to substantially overlap with the grip 120, and then the The meshing teeth 532 are fitted into the receiving groove 520. In this way, the boom 200 can be positioned in a stowed state relative to the head 110.

It is worth mentioning that, as shown in FIG. 7 , when the boom 200 is in the stowed state, the triggering member 365 also rotates to the position corresponding to the sensing member 366 along with the boom 200 . At this time, the controller 361 receives the input of the control signal, thereby blocking the power supply circuit between the driving member 310 and the battery 350, and simultaneously invalidating the action of the starting signal to prevent the trigger member 364 from being mistaken. Touched to cause harm.

However, compared with the meshing teeth 532 in the first embodiment, the moving direction of the axis L is used, and the rotatably positioned hand-held power belt of the present invention is inserted or away from the card slots 510. Further, a second embodiment is adopted, in which the moving direction parallel to the axis L is used to also rotationally position the boom 200 relative to the head 110, and the arm frame 200 can be prevented from being disengaged in the direction of the axis L. The head 110.

Therefore, referring to FIG. 8 to FIG. 11 , the second embodiment includes a casing 100 ′, a boom 200 ′, a grinding device 300 , a limiting device 400 , and a positioning device 500 ′.

The related components and operation principles of the polishing apparatus 300 and the limiting device 400 are as described in the first embodiment and the foregoing description, and thus are not described again.

The casing 100' includes a head 110' and a grip 120. The head 110' has a pivot seat 111' surrounding an axis L and an flared end surface 112. The pivot seat 111' includes a port 113 and an assembly slot 114 extending parallel to the axis L. The flared end surface 112 is formed to extend radially from the side of the pivot seat 111' away from the port 113.

The boom 200' extends along a transverse direction T intersecting the axis L and includes a proximal end portion 210' and a distal end portion 220. The proximal end portion 210' has a sleeve 211' pivoted to the pivot seat 111' and including a sliding slot 213.

The positioning device 500 ′ includes a plurality of slots 510 defined around the axis L and recessed in the flared end surface 112 , and a receiving slot 520 which is also recessed on the flared end surface 112 and located on one side of the card slot 510 . A card block 530', and an elastic member 540 that causes the card block 530' to be embedded in the card slots 510. The block 530' has a control button 531' slidably disposed on the sliding slot 213, and is located outside the sleeve 211', and is driven by the control button 531' and located in the sleeve 211'. Engagement teeth 532'.

Thereby, when the user pulls the control button 531 ′, the meshing teeth 532 ′ will retreat away from the card slots 510 , so that the arm frame 200 ′ can pass through the sleeve 211 ′ and the pivot seat 111 ′. Linked and rotated relative to the head 110'. When the user adjusts the angle of the boom 200' relative to the head 110', the control button 531' is released, so that the elastic force of the elastic member 540 pushes the control button 531' to drive the meshing tooth. The 532' is embedded in one of the card slots 510. In addition, when the user wants to store the rotatably positioned hand-held power belt machine of the present invention (not shown, see FIG. 6), the boom 200' can be rotated to substantially generate the same with the grip 120. The meshing teeth 532' are embedded in the receiving groove 520. In this way, the boom 200' can be positioned in a stowed state relative to the head 110'. At this time, the power supply circuit between the driving member 310 and the battery 350 is blocked by the controller 361, and the occurrence of the accidental contact of the trigger member 364 can be avoided.

In summary, the rotatably positionable hand-held power belt machine of the present invention has the following advantages and advantages, so that the object of the present invention can be achieved:

1. The bumps 420 are slidably embedded in the ring groove 410, and the arm frame 200 (200') can be effectively prevented from pivoting when the first and second directions D1 and D2 are pivoted. The head 110 (110') is disengaged in the L direction.

2. The mechanical connection between the meshing teeth 532 (532') and the card slots 510 is a fitting manner, so that the joint strength can be improved, and the chance of loosening due to the vibration of the operation can be effectively reduced; In the form of operation, it is also faster and more convenient than the conventional screw-locked form.

3. The acute angle formed by the first stop surface 512 of each of the card slots 510 and the bottom surface 511 of the slot is such that the meshing teeth 532 can effectively prevent the meshing teeth 532 from jumping out when the one of the slots 510 is engaged. The card slot 510.

4. When the boom 200 (200') is positioned in the stowed state, the controller 361 can block the power supply circuit between the driving member 310 and the battery 350 to prevent the trigger member 364 from being accidentally touched. Hazard, in order to enhance the safety of storage.

However, the above is only the embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, all the equivalent equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still It is within the scope of the patent of the present invention.

100,100‧‧‧Chassis
110,110‧‧‧ head
111,111‧‧‧
112‧‧‧Extended end face
113‧‧‧port
114‧‧‧Assemble slot
120‧‧‧ grip
200,200‧‧‧Boom
210,210‧‧‧ Near end
211,211‧‧‧ sleeve
212‧‧‧through holes
213‧‧ ‧ chute
220‧‧‧ distal end
300‧‧‧ grinding device
310‧‧‧ drive parts
320‧‧‧Drive wheel
330‧‧‧ driven wheel
340‧‧‧ abrasive belt
350‧‧‧Battery
360‧‧‧Switch circuit
361‧‧‧ Controller
362‧‧‧Acoustic switch
363‧‧‧Safety switch
364‧‧‧Laser parts
365‧‧‧trigger
366‧‧‧Sensors
400‧‧‧ Limiting device
410‧‧‧ Ring groove
420‧‧‧Bumps
421‧‧‧ bolt
500,500‧‧‧ Positioning device
510‧‧‧ card slot
511‧‧‧Slot bottom
512‧‧‧First stop surface
513‧‧‧second stop surface
520‧‧‧ Storage trough
530, 530‧‧ ‧ block
531,531‧‧‧Control keys
532,532‧‧‧Meshing teeth
540‧‧‧Flexible parts
D1‧‧‧ first direction
D2‧‧‧ second direction
L‧‧‧ axis
T‧‧‧ Landscape

Other features and advantages of the present invention will be apparent from the embodiments of the present invention, wherein: FIG. 1 is an exploded perspective view showing a first embodiment of a rotatably positionable hand-held power belting machine of the present invention. FIG. 2 is a partial perspective view showing a casing in the first embodiment, and a partial limiting device and a partial positioning device disposed on the casing; FIG. 3 is a partial exploded perspective view showing the first a boom in the embodiment, a partial grinding device, a partial limiting device and a partial positioning device disposed on the arm frame, and a block of the positioning device is decomposed from the consistent hole of the arm frame; 4 is a partial cross-sectional view showing the arm frame mounted on the casing, the card block is embedded in one of the card slots, and the arm frame is positioned in a processed state; FIG. 5 is a partial cross-sectional view showing When a sleeve of the boom is assembled to a pivot seat of the casing, the two bumps are respectively disposed in a ring groove; FIG. 6 is a partial cross-sectional view showing the arm frame rotating to substantially overlap with a grip, Let the card be embedded in a storage The arm frame is positioned in a stowed state; FIG. 7 is a schematic view showing the circuit between a driving member, a battery, and a switching circuit in the first embodiment when the arm frame is positioned in the stowed state. a connection relationship, and a relative position of a trigger member and a sensing member in the switch circuit; FIG. 8 is a partial perspective view showing a casing in a second embodiment, and a portion of the casing disposed on the casing Figure 9 is a partial plan view of the front view of Figure 8, illustrating a receiving slot in the positioning device on one side of the plurality of card slots; Figure 10 is a partial exploded perspective view of the first a boom in a second embodiment, and a partial grinding device, a partial limiting device and a partial positioning device disposed on the arm frame, and decomposing a block in the positioning device from a chute of the arm frame And FIG. 11 is a partial cross-sectional view showing that after the arm frame is mounted on the casing, the card block is embedded in one of the card slots, and the arm frame is positioned in a processed state.

111‧‧‧ squat

114‧‧‧Assemble slot

120‧‧‧ grip

200‧‧‧Boom

212‧‧‧through holes

365‧‧‧trigger

400‧‧‧ Limiting device

410‧‧‧ Ring groove

510‧‧‧ card slot

511‧‧‧Slot bottom

512‧‧‧First stop surface

513‧‧‧second stop surface

520‧‧‧ Storage trough

530‧‧‧ card block

531‧‧‧Control keys

532‧‧‧Meshing teeth

420‧‧‧Bumps

421‧‧‧ bolt

500‧‧‧ Positioning device

540‧‧‧Flexible parts

D1‧‧‧ first direction

D2‧‧‧ second direction

Claims (9)

A rotatably positioned hand-held power belting machine comprising: a casing comprising a head and a grip, the head having a pivotal seat surrounding an axis and including a port; a boom extending along a Intersecting transversely of the axis, and comprising a proximal end portion and a distal end portion, the proximal end portion having a sleeve pivoted to the pivot base; a grinding device comprising a driving member disposed on the head portion a driving wheel that is driven by the driving member and protrudes from the port, a driven wheel pivotally disposed at the distal end portion, and a sanding belt disposed around the driving wheel and the driven wheel; a limiting device The utility model comprises a ring groove recessed in the pivot seat, and a plurality of lugs disposed on the sleeve and slidably embedded in the ring groove, the limiting device is configured to prevent the arm frame from being at the axis Disengaging the head in a direction; and a positioning device comprising a plurality of card slots surrounding the axis and disposed on one of the pivot seat and the sleeve, movably disposed on the pivot seat and the sleeve a card block, and a storage slot on one side of the card slots, when the card block is operated When the slot is in position, the arm frame is positioned in a processing state relative to the head. When the card block is moved away from the card slots, the arm frame can be rotated relative to the head portion, and when the card block is operated, the card block is embedded in the receiving slot. The arm is positioned in a stowed condition relative to the head, the arm substantially overlapping the grip. The rotatably positioned hand-held power belt machine of claim 1, wherein the driving member is a motor, the grinding device further comprising a battery disposed on the handle and an electrical connection between the driving member and the battery Switch circuit The road has a controller and a safety switch, the safety switch includes a triggering member located on the arm frame, and a sensing member located on the arm, and outputting when the safety switch detects that the arm frame is positioned in the stowed state A control signal, the controller blocks the battery from being powered to the driver according to the control signal. The rotatably positioned hand-held power belt machine of claim 2, wherein the positioning device further comprises an elastic member that causes the card to be embedded in the card slots, and the card slot of the positioning device is from the pivot The sleeve is recessed, the sleeve of the boom comprises a consistent hole, the block is disposed in the through hole, and has a control button located outside the sleeve and a meshing tooth located in the sleeve. The rotatably positioned hand-held power belt machine of claim 3, wherein the boom is rotatable relative to the head in a first direction and a second direction opposite the first direction, each card The slots are respectively defined by a slot bottom surface, a first blocking surface, and a second blocking surface. The engaging teeth of the block abut against the first blocking surface to prevent the arm from rotating in the first direction. The engaging teeth of the block against the second blocking surface can prevent the arm from rotating in the second direction, and the block is pivotally disposed on the through hole, and the return elastic force of the elastic member enables the The block tends to swing in the second direction. The rotatably positioned hand-held power belt machine of claim 4, wherein an angle between the first stop surface of each of the card slots and the bottom surface of the groove is between 60 degrees and 85 degrees. The rotatably positioned hand-held power belt machine of claim 3, wherein the circumferential width of the slots of the positioning device is smaller than the circumferential width of each of the protrusions of the limiting device. The rotatably positioned hand-held power belt machine of claim 6, wherein the limiting device has two protrusions and is disposed on the sleeve 180 degrees along the lateral direction, wherein one of the protrusions is fixedly The sleeve protrudes from the axis, and another bump is slidably disposed in the sleeve along the lateral direction. The rotatably positioned hand-held power belt machine of claim 7, wherein the pivot seat is further recessed with an assembly groove parallel to the axis, and the assembly groove communicates with the ring groove, when the arm frame is sleeved When the tube is inserted into the pivot seat, the protrusion fixed to the sleeve is aligned with the assembly groove, and can be slid along the assembly groove to the ring groove. At this time, another protrusion can slide along the lateral direction. Grounded in the ring groove. The rotatably positioned hand-held power belt machine of claim 2, wherein the head further has an outwardly extending end face extending from a side of the pivot seat away from the port and extending in a radial direction, the positioning device further comprising The card slot of the positioning device and the receiving slot are recessed from the outer expansion end face, the sleeve of the arm frame includes a sliding slot, the card is inclined to be inserted into the elastic member of the card slot The block is disposed in the chute and has a control button located outside the sleeve.