CN102699798B - Hand-held electric belt sander - Google Patents

Abstract

The invention provides a hand-held electric abrasive belt machine, which includes a body part and an abrasive belt installation part, wherein the body part includes a casing, a head shell and a head shell cover, and the head shell cover has a first circular connection port, the first Two protruding locking reeds spaced apart from each other are fixed on the outer peripheral wall of the circular connection port; the abrasive belt installation part includes an abrasive belt, a mounting bracket and an adjusting rod arranged on the mounting bracket, and the mounting bracket has a second circle The first circular interface is rotatably plugged into the second circular interface, and the inner wall of the second circular interface is provided with a groove. When the mounting bracket rotates relative to the head shell cover, the two springs The pieces can alternately fall into the groove, and a locking screw can connect and fix the mounting bracket with the head shell cover; the abrasive belt is installed on the adjustment rod and the output shaft. The abrasive belt installation part of the present invention can be rotated and adjusted relative to the body part, which not only facilitates the sanding operation in a narrow working area, but also facilitates the sanding of grooves and inner holes.

Description

Handheld electric belt machine

technical field

The invention relates to an abrasive belt machine, in particular to a hand-held electric abrasive belt machine.

Background technique

Handheld electric belt sanders are used for sanding surfaces such as wood and metal materials. The existing hand-held electric abrasive belt machine includes a body part and an abrasive belt installation part, which are fixedly connected between the body part and the abrasive belt installation part, the motor body is installed, and the abrasive belt installation part is equipped with an abrasive belt for sanding Because the abrasive belt installation part can not rotate relative to the body part, it can only be applied to the relatively spacious place of the processing site, and can not process only grooves and inner holes with a depth of several centimeters, which is inconvenient to use.

Contents of the invention

The technical problem solved by the invention is to provide a hand-held electric belt sander, which can conveniently sand the groove and the inner hole.

The technical solution of the present invention is: a hand-held electric belt machine, which is characterized in that it includes a body part and an abrasive belt installation part, wherein the body part includes a casing, a head shell and a head shell cover, and the head shell Connected between the casing and the head casing cover, a motor is installed in the casing, the end of the motor shaft extends into the head casing, and the end of the rotation shaft is equipped with a driving bevel gear, so An output shaft is installed in the head shell cover through a bearing, the axis of the output shaft is perpendicular to the axis of the rotating shaft, and the top of the output shaft extends into the head shell and is equipped with a The driven bevel gear with the gears meshing, the bottom of the output shaft extends out of the head cover, the head cover has a first circular connection port, and two protruding two The lock reeds spaced apart from each other; the abrasive belt installation part includes an abrasive belt, a mounting bracket and an adjustment rod arranged on the mounting bracket, the mounting bracket has a second circular connection port, and the first circular interface can be The rotation is inserted into the second circular interface, and the inner wall of the second circular interface is provided with a groove. When the mounting bracket rotates relative to the head shell cover, the two spring pieces can alternately fall into the In the groove, a locking screw can connect and fix the mounting bracket with the head cover; the abrasive belt is installed on the adjusting rod and the output shaft.

The two lock reeds are located on the same circumference, and the central angle corresponding to the arc line where the two lock reeds are located is α, 40°≤α≤60°.

The central angle α=50° corresponding to the circular arc where the two locking reeds are located.

The extension line of the adjustment rod is perpendicular to the output shaft, the end of the adjustment rod is provided with a pulley, and the abrasive belt is installed on the bottom of the pulley and the output shaft.

The abrasive belt installation part also includes a hole shaft and a sliding block, one end of the hole shaft is fixed to the mounting bracket, the other end of the hole shaft is provided with an axial blind hole, and a spring is arranged in the blind hole, and the spring One end extends out of a blind hole, one end of the sliding block is provided with a guide cylinder, the other end of the sliding block is fixed with the adjustment rod, the blind hole section of the hole shaft is slidably inserted into the guide cylinder of the sliding block, and The protruding end of the spring is fixed on the bottom of the guide cylinder, and the outer wall of the sliding block is provided with a sliding trigger.

There are guide slots on the installation bracket, the sliding trigger is installed in the guide slots of the installation bracket through screw gaps, and the screws pass through the guide slots of the installation bracket and are fixed to the sliding block connect.

The sliding trigger can rotate along the screw, the sliding trigger is provided with an arc-shaped flange, and the mounting bracket is provided with a baffle in contact with the arc-shaped flange. When the sliding trigger rotates, the sliding trigger drives the sliding block Overcome the resistance of the spring to move along the guide slot.

The beneficial effects of the present invention are:

1. Since the head shell cover has a first circular connection port, two protruding locking reeds spaced apart from each other are fixed on the outer peripheral wall of the first circular connection port, and the mounting bracket has a second circular connection port , the first circular interface is rotatably plugged into the second circular interface, and the inner wall of the second circular interface is provided with a groove, when the mounting bracket rotates relative to the head shell cover, the two spring pieces Alternately falling into the groove, a locking screw can connect and fix the mounting bracket with the head shell cover, so the abrasive belt mounting part of the present invention can be rotated and adjusted relative to the body part, which is not only convenient Sanding operations are performed in narrow working areas, and it is convenient to sand grooves and inner holes.

2. Since the adjustment rod and the sliding block are fixed, the sliding block is provided with a guide cylinder, and the hole shaft can be inserted into the guide cylinder movably, and the spring in the hole shaft bears against the bottom of the guide cylinder, and the sliding block overcomes the resistance of the spring by pulling the sliding trigger Move toward the side of the hole shaft, which shortens the distance for assembling the abrasive belt and facilitates the loading and unloading of the abrasive belt. After loading the abrasive belt, dial back the sliding trigger, and the spring will push the sliding block back to its original position, tightening the abrasive belt.

Description of drawings

Fig. 1 is a schematic diagram of the internal structure of the present invention;

Fig. 2 is a schematic structural view of the cranium cover in the present invention;

Fig. 3 is the structural representation of mounting bracket among the present invention;

Fig. 4 is a schematic diagram of the external structure of the present invention;

Fig. 5 is a bottom view of Fig. 4 .

Detailed ways

Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

Referring to Figures 1 to 5, a hand-held electric belt sander includes a body part and an abrasive belt installation part, wherein the body part includes a casing 1, a head shell 2 and a head shell cover 3, and the head shell 2 Connected between the casing 1 and the head shell cover 3, a motor 4 is installed in the casing 1, the end of the rotating shaft 41 of the motor 4 extends into the head casing 2, and the rotating shaft 41 The end is equipped with a driving bevel gear 5, and an output shaft 6 is installed through a bearing in the head shell cover 3. The axis line of the output shaft 6 is perpendicular to the axis line of the rotating shaft 41, and the top of the output shaft 6 extends into the Into the head shell 2 and installed with the driven bevel gear 7 meshed with the driving bevel gear 5, the bottom of the output shaft 6 extends out of the head shell cover 3, the head shell cover 3 has a first circular connection port 31, the outer peripheral wall of the first circular connection port 31 is fixed with two protruding locking reeds 32, 33 spaced apart from each other; the abrasive belt installation part includes an abrasive belt 8, a mounting bracket 9 and a The adjusting rod 10 on the mounting bracket 9, the material of the mounting bracket 9 is metal aluminum, the mounting bracket 9 has a second circular connection port 91, and the first circular interface 31 is rotatably plugged into the second circular connection port. In the interface 91, and the inner wall of the second circular interface 91 is provided with a groove 91', when the mounting bracket 9 rotates relative to the head shell cover 3, the two spring pieces 32, 33 can alternately fall into the In the groove 91 ′, a locking screw 11 can connect and fix the installation bracket 9 and the head shell cover 3 ; the abrasive belt 8 is installed on the adjusting rod 10 and the output shaft 6 . The two lock reeds 32, 33 are located on the same circumference, and the central angle corresponding to the arc line where the two lock reeds 32, 33 are located is α. The arcs where the two lock reeds 32, 33 are located in this embodiment The central angle α=50° corresponding to the line, and α can also be equal to 40° or 60°. The extension line of the adjustment rod 10 is perpendicular to the output shaft 6 , the end of the adjustment rod 10 is provided with a pulley 12 , and the abrasive belt 8 is installed on the bottom of the pulley 12 and the output shaft 6 . The abrasive belt installation part also includes a hole shaft 13 and a sliding block 14, one end of the hole shaft 13 is fixed to the mounting bracket 9, and the other end of the hole shaft 13 is provided with an axial blind hole, and the blind hole is provided with A spring 15, and one end of the spring 15 extends out of the blind hole, one end of the sliding block 14 is provided with a guide cylinder, the other end of the sliding block 14 is fixed with the adjustment rod 10, and the blind hole section of the hole shaft 13 can slide is inserted into the guiding cylinder of the sliding block 14, and the protruding end of the spring 15 is fixed on the bottom of the guiding cylinder, and the outer wall of the sliding block 15 is provided with a sliding trigger 16. The mounting bracket 9 is provided with guide slots, the sliding trigger 16 is installed in the guide slots of the mounting bracket 9 through screws 17, and the screws 17 pass through the guide slots of the mounting bracket 9 It is fixedly connected with the sliding block 14. The sliding trigger 16 can rotate along the screw 17, the sliding trigger 16 is provided with an arc-shaped flange 16', and the mounting bracket 9 is provided with a baffle plate 18 in contact with the arc-shaped flange 16'. When the trigger 16 rotates, the sliding trigger 16 drives the sliding block 14 to overcome the resistance of the spring 15 and move along the guide groove. At this time, the distance for assembling the abrasive belt is shortened, which facilitates the loading and unloading of the abrasive belt. Then dial back the sliding trigger, and the spring pushes the sliding block back to its original position, tightening the abrasive belt.

The working principle of the present invention is as follows: a bearing is installed at the end of the adjusting rod through a shaft pin, the pulley 12 is installed on the bearing at the end of the adjusting rod, and the abrasive belt 8 is sleeved on the bottom of the pulley 12 and the output shaft 6 . When it is necessary to replace the abrasive belt, turn the sliding trigger 16, and the sliding trigger 16 drives the sliding block 14 to overcome the resistance of the spring 15 and move along the guide slot. At this time, the distance for assembling the abrasive belt is shortened, which facilitates the loading and unloading of the abrasive belt , After loading the abrasive belt, turn back the sliding trigger, the spring pushes the sliding block back to its original position, and tightens the abrasive belt. A starter motor 4 is provided, and the driving bevel gear 5 of the rotating shaft 41 drives the output shaft 6 for transmission through the driven bevel gear 7, and the output shaft 6 drives the abrasive belt 8 to work. When the abrasive belt installation part needs to be able to rotate relative to the body part, remove the locking screw 11, then rotate the abrasive belt installation part, and when the lock reed 32 or lock reed 33 falls into the groove 91', it means that the abrasive belt The mounting part is rotated in place, and then the mounting bracket 9 of the abrasive belt mounting part is connected and fixed with the head shell cover 3 of the body part by locking screws 11 .

Claims (6)

1. A hand-held electric abrasive belt machine, characterized in that: it comprises a body portion and an abrasive belt installation portion, wherein, The body part includes a casing (1), a head shell (2) and a head shell cover (3), and the head shell (2) is connected between the casing (1) and the head shell cover (3) Between, the motor (4) is installed in the casing (1), the end of the rotating shaft (41) of the motor (4) extends into the head shell (2), and the end of the rotating shaft (41) is installed with The driving bevel gear (5), the output shaft (6) is installed through the bearing in the described head cover (3), the axis line of the output shaft (6) is perpendicular to the axis line of the rotating shaft (41), The top of the output shaft (6) extends into the head shell (2) and is equipped with a driven bevel gear (7) meshed with the driving bevel gear (5), and the bottom of the output shaft (6) extends out of the head The shell cover (3), the head shell cover (3) has a first circular connection port (31), and two protruding two spaced apart from each other are fixed on the outer peripheral wall of the first circular connection port (31). The lock reeds (32, 33); The abrasive belt installation part includes an abrasive belt (8), a mounting bracket (9) and an adjusting rod (10) arranged on the mounting bracket (9), and the mounting bracket (9) has a second circular connection port (91), the first circular connection port (31) is rotatably inserted in the second circular connection port (91), and the inner wall of the second circular connection port (91) is provided with a groove (91' ), when the mounting bracket (9) rotates relative to the head shell cover (3), the two locking reeds (32, 33) can alternately fall into the groove (91 '), a locking screw (11) The installation bracket (9) can be connected and fixed with the head shell cover (3), the abrasive belt (8) is installed on the adjustment rod (10) and the output shaft (6), and the abrasive belt installation part It also includes a hole shaft (13) and a sliding block (14), one end of the hole shaft (13) is fixed to the mounting bracket (9), and the other end of the hole shaft (13) is provided with an axial blind hole, The blind hole is provided with a spring (15), and one end of the spring (15) extends out of the blind hole, one end of the sliding block (14) is provided with a guide cylinder, and the other end of the sliding block (14) is fixed with the adjusting Rod (10), the blind hole section of the hole shaft (13) is slidably inserted into the guide cylinder of the sliding block (14), and the protruding end of the spring (15) is fixed on the bottom of the guide cylinder , the outer wall of the sliding block (14) is provided with a sliding trigger (16). 2. The hand-held electric belt sander according to claim 1, characterized in that: the two lock reeds (32, 33) are located on the same circumference, and the arcs where the two lock reeds (32, 33) are located The central angle corresponding to the line is α, 40°≤α≤60°. 3. The hand-held electric belt sander according to claim 2, characterized in that: the central angle α=50° corresponding to the circular arc where the two locking reeds (32, 33) are located. 4. The hand-held electric belt sander according to claim 1, characterized in that: the extension line of the adjustment rod (10) is perpendicular to the output shaft (6), and the end of the adjustment rod (10) is provided with A pulley (12), the abrasive belt (8) is installed on the bottom of the pulley (12) and the output shaft (6). 5. The hand-held electric belt sander according to claim 4, characterized in that: said mounting bracket (9) is provided with a guide slot, and said sliding trigger (16) is installed on the The guide slot hole of the installation bracket (9), and the screw (17) passes through the guide slot hole of the installation bracket (9) and is fixedly connected with the sliding block (14). 6. The hand-held electric belt sander according to claim 5, characterized in that: the sliding trigger (16) can rotate along the screw (17), and the sliding trigger (16) is provided with an arc-shaped flange ( 16'), the mounting bracket (9) is provided with a baffle (18) in contact with the arc-shaped flange (16'), when the sliding trigger (16) rotates, the sliding trigger (16) drives the sliding block ( 14) Overcoming the resistance of the spring (15) to move along the guide slot.