Belt type sanding machine

Abstract

The belt type sanding machine comprises a handle, a main switch is arranged on the handle, a base is arranged on one side of the handle, the base is used for installing a battery pack, a main machine shell is arranged on the side, away from the base, of the handle, a driving device is arranged in the main machine shell, a volute is installed at the end of one side of the main machine shell, and a motor is arranged on the volute. The output end of the driving device penetrates through the volute and is located in the volute, a driving wheel and a first support module are installed at the position, located on the inner side of the volute, of the output end, the first support module is rotatably installed on the volute through a button module, the first support module comprises a first rolling wheel, and the second support module comprises a second rolling wheel. The second roller protrudes out of the volute, the abrasive belt is arranged on the second roller and the driving wheel in a sleeving mode or the first roller, the second roller and the driving wheel in a sleeving mode, and the tensioning module is used for tensioning the abrasive belt. Therefore, the belt sander can be used for polishing objects on different occasions.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of handheld power tools, in particular to a belt sander. BACKGROUND

[0002] The belt sander is also called belt sanding, which has good heat dissipation, high sanding efficiency, wide application, and is suitable for sanding the surface of flat and regular objects. The current belt sander has poor polishing effect when polishing the surface of irregular objects such as circles because of its fixed shape, and multiple types of belt sanders are needed to cooperate to polish, thereby limiting the use range of the handheld belt sander.

[0003] Therefore, it is necessary to improve the existing belt sander. SUMMARY

[0004] In order to overcome the above-mentioned defects, the purpose of the present application is to provide a belt sander with simple structure and capable of polishing the surface of irregular objects.

[0005] In order to achieve the above purpose, the present application adopts the following technical solutions:

[0006] A belt sander comprises:

[0007] A handle is provided with a main switch electrically connected to a control module in the handle,

[0008] One side of the handle has a base for mounting a battery pack, and the side of the handle away from the base has a main housing with a driving device inside,

[0009] A volute is mounted at one end of the main housing,

[0010] The output end of the driving device passes through the volute and is located inside the volute, and a driving wheel is mounted on the inside of the volute,

[0011] A first support module is rotatably mounted on the volute by a button module, and the first support module comprises a first roller,

[0012] A second support module comprises a second roller protruding from the volute,

[0013] A sanding belt is sleeved on the second roller and the driving wheel or the first roller,

[0014] A tensioning module is used to tension the sand belt. By such design, the button module is pressed, the first support module is rotated, and the sand belt is adjusted by the cooperation of the first support module and the second support module, so as to expand the application range of the belt sander (which can be used for polishing the surface of a circular object / article). In addition, one belt sander can realize the functions that previously required multiple types of belt sanders to cooperate to complete.

[0015] In an embodiment, the first support module comprises a lever,

[0016] One end of the lever is provided with a first base, and a first roller is mounted on the first base for contacting the sand belt.

[0017] The end of the lever away from the first base is provided with a second base, and the second base is provided with a through hole.

[0018] In an embodiment, the through hole comprises a first through hole and a second through hole, and the second through hole is a regular polygon.

[0019] In an embodiment, the second through hole is a regular hexagon or a regular octagon.

[0020] In an embodiment, the button module comprises a button, a columnar connecting rod, and an elastic component,

[0021] The connecting rod has a detent portion away from the button side, the detent portion is a regular polygon, and the number of sides of the regular polygon of the detent portion is the same as the number of sides of the second through hole.

[0022] In an embodiment, the volute has a bottom plate, the bottom plate has a through hole, the output end of the driving device passes through the through hole and is located in the volute, and a driving wheel is mounted on the output end.

[0023] In an embodiment, the bottom plate is provided with a mounting seat, the mounting seat is provided with a regular polygon slot, and the slot mounts the button module.

[0024] In an embodiment, the mounting seat of the bottom plate has a receiving groove on the same side, the side plate of the receiving groove has a limiting portion close to the mounting seat side, and the limiting portion limits the rotation amplitude of the first support module,

[0025] The second support module is configured to extend along the axis direction of the handle.

[0026] Advantages

[0027] The belt sander disclosed in the present application can be used in different occasions (regular or irregular) for polishing objects by setting the first support module to be rotated in the visible application occasion, and the adjustment process is simple, which can improve the user experience. Attached Figure Description

[0028] The accompanying drawings are provided to illustrate the technical solutions of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the technical solutions of this disclosure and do not constitute a limitation on the technical solutions of this disclosure. The shapes and sizes of the components in the drawings do not reflect actual proportions and are only intended to illustrate the content of this application.

[0029] Figure 1 , 2 This is a three-dimensional schematic diagram of the belt sander in the first mode according to an embodiment of this application;

[0030] Figure 3 , 4 4a is a three-dimensional schematic diagram of the belt sander in the second mode according to the embodiment of this application;

[0031] Figure 5 , 6 This is a schematic diagram of a belt sander with the battery pack concealed, according to an embodiment of this application.

[0032] Figure 7 This is a schematic diagram of the belt sander in the second mode according to an embodiment of this application;

[0033] Figure 8 This is a schematic diagram of the lever structure in an embodiment of this application;

[0034] Figure 9 This is a schematic diagram of the locking part connected to the connecting rod in an embodiment of this application;

[0035] Figure 10 This is a schematic diagram of the volute structure according to an embodiment of this application;

[0036] Figure 11 This is a schematic diagram of the handle being connected to the main unit housing according to an embodiment of this application. Detailed Implementation

[0037] The above-described solution will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of this application. The implementation conditions used in the embodiments may be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are generally those in routine experiments.

[0038] Next, we will combine the appendix Figures 1-11 To describe the belt sander proposed in this application.

[0039] like Figure 1 and 2 The diagram shown is a three-dimensional schematic of a belt sander in the first mode according to an embodiment of this application.

[0040] The belt sander includes a handle 110, with a base 111 on one side of the handle, on which a battery pack 200 is mounted. The battery pack 200 includes a plurality of regularly arranged lithium-based cells. The battery pack 200 includes solid-state batteries.

[0041] The handle has a main housing 120 on the side away from the base 111, and the main housing 120 contains a drive device (such as a drive motor, not shown). A main switch 130 is disposed on the handle, which is electrically connected to a control module (not shown) inside the handle. In one embodiment, the main switch 130 may be an integrated switch with integrated speed control to meet different application requirements (sand belt speed between 120-470 m / min). The control module may be located on the base 111 side.

[0042] A volute 140 is mounted on one end of the main housing 120. The output end of the drive motor passes through the volute 140, and a drive wheel is mounted on the portion of the volute 140 located within it. The drive motor may be a brushless motor. In one embodiment, the drive motor is coupled to a gearbox. The side of the main housing 120 away from the volute 140 has a heat dissipation vent to dissipate heat from the drive motor.

[0043] The volute 140 is provided with a tensioning module, which has an adjustment switch 150 that is rotatably mounted on the volute 140.

[0044] The volute 140 houses a first support module and a second support module 180, with the second support module protruding from the volute 140. The first support module is connected to a button 160, and is configured to allow pressing the button 160 to switch between a first mode and a second mode. Figure 1 As shown, the first support module is housed within the volute 140, and its rollers do not contact the sanding belt. The second support module 180 is configured along the axial direction of the handle ( Figure 2 Extending in the x-direction. The first support module is configured to have an angle between 0° and 75° with the axis of the handle. That is, the first support module is configured to rotate within the range of 0° to 75° in the axis of the handle.

[0045] like Figure 3 and Figure 4As shown, the first support module 190 is in the second mode, part of the first support module 190 protrudes into the spiral housing 140, the first roller 192 on the first support module 190 is in contact with the sand belt 170, and the first support module 190, the second support module 180 and the sand belt 170 form a triangle. In this way, the posture of the first support module 190 is adjusted to adapt to the grinding of different objects, and the multifunctional application of the sander is realized. In this embodiment, the tension and tightness of the sand belt are adjusted by the tensioning module (for example, the second support module 180 extends and retracts along the side plate 145 of the receiving groove). The existing mechanism can be used for the tensioning module, which is not limited here, as long as the tension and tightness of the sand belt can be adjusted to meet the working conditions.

[0046] Next, the structure of the first support module will be described in combination with Figures 4-10

[0047] The first support module 190 includes a lever 193, one end of the lever 193 is provided with a first base 191, the first base 191 is provided with a first roller 192, and the first roller 192 is used to abut against the sand belt 170. The other end of the lever 193 is provided with a second base 194, the second base 194 is provided with a through hole, the through hole includes a first through hole 194b and a second through hole 194a, the first through hole 194b is circular, and the second through hole 194a is a regular polygon (for example, a regular hexagon). The angle of rotation can be controlled by using a regular polygon, and the polygon structure can be used for fixation after selection, so that the first support module does not need additional auxiliary fixing parts after the posture is adjusted.

[0048] The button module 160 includes a button 161, a columnar connecting rod 162 and an elastic part 164, the connecting rod 162 away from the button 161 side has a detent part 163, the detent part 163 is a regular polygon (for example, a regular hexagon), and the number of edges of the detent part 163 is the same as the number of edges of the second through hole 194a. The second base 194 is sleeved on the connecting rod 162, and the detent part 163 is partially located in the second through hole 194a. The elastic part 164 abuts against the end of the detent part 162.

[0049] The spiral housing 140 has a bottom plate 142 (also referred to as a side plate), one side of the bottom plate 142 has an outwardly extending side wall 141, the bottom plate 142 has a through hole 142a, the output end of the driving motor passes through the through hole 142a and is provided with a driving wheel 121 at the part located in the spiral housing 140.

[0050] The spiral housing is fixed to one side end of the main housing 120. For example, the spiral housing is fixed to the side end of the main housing 120 by a fixing part such as a bolt.

[0051] ​The side wall 141 of the bottom plate 142 has a receiving groove on the same side, and the side plate 145 of the receiving groove has a limiting portion 145a close to the mounting seat 143 side, which limits the rotation range of the lever 193. The receiving groove receives the first support module 190. The width of the side wall 141 is slightly larger than the width of the abrasive belt 170. The side wall 141 can play a role in protecting the abrasive belt 170. In an embodiment, the second support module 180 is configured to be adjustable in depth along the extension direction of the side plate 145 of the receiving groove (to adjust the length of the abrasive belt).

[0052] The bottom plate 142 is provided with a mounting seat 143, and the mounting seat 143 is provided with a regular polygonal hole groove 144, which receives an elastic component 164 (such as a spring) and a clamping portion 163 partially embedded in the mounting seat 143. And the end of the clamping portion 163 has a certain gap / space from the bottom plate 142 (based on the gap / space pressing the button, realizing the clamping portion 163 and the lever 193 are disconnected, rotating the lever 193, the second base 194 rotates along the connecting rod 162 (realizing the first support module 190 is in the first mode or the second mode, loosening and using the elastic component 164 to reset the connecting rod, rotating the lever 193 along the connecting rod 162 or the button 161 (the button 161 is sleeved on the connecting rod 162, and partially embedded in the first perforation 194b of the second base), rotating to a preset angle such as 60° / 45°, and the clamping portion 163 is partially embedded in the second perforation 194a under the action of the elastic force).

[0053] When the belt sander is in the first mode, the abrasive belt 170 is sleeved on the second roller 181 of the second support module 180 and the driving wheel 121, based on the driving of the motor, driving the abrasive belt 170 to rotate to polish the surface of the object (such as can polish to the wall edge).

[0054] When the belt sander is in the second mode, the abrasive belt 170 is sleeved on the first roller of the first support module 190, the second roller 181 of the second support module 180 and the driving wheel 121, forming a stable triangle, at this time no other auxiliary fixing is needed, based on the driving of the motor, driving the abrasive belt 170 to rotate to polish the surface of the circular object.

[0055] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent transformation or modification made in the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A belt sander characterized by, The belt sander comprises: a handle, which is provided with a main switch and is electrically connected to a control module in the handle, one side of the handle is provided with a base for mounting a battery pack, the side of the handle away from the base is provided with a main housing, and the main housing is provided with a driving device, one side of the main housing is provided with a volute, an output end of the driving device penetrates the volute and is provided with a driving wheel inside the volute, a first support module is rotatably mounted on the volute by a button module, and the first support module comprises a first roller, a second support module comprises a second roller, and the second roller protrudes from the volute, a sand belt is sleeved on the second roller and the driving wheel or the first roller, and a tensioning module is used for tensioning the sand belt.

2. The belt sander according to claim 1, wherein the first support module comprises a lever, one end of the lever is provided with a first base, and the first base is provided with a first roller for contacting the sand belt, and the end of the lever away from the first base is provided with a second base, and the second base is provided with a through hole.

3. The belt sander according to claim 2, wherein the through hole comprises a first through hole and a second through hole in communication, and the second through hole is close to the side of the driving device and has a regular polygonal shape.

4. The belt sander according to claim 3, wherein the second through hole has a regular hexagonal or octagonal shape, and the first through hole has a circular shape.

5. The belt sander according to claim 3, wherein the button module comprises a button, a columnar connecting rod and an elastic component, the connecting rod away from the button side is provided with a locking portion, and the locking portion has a regular polygonal shape, and the number of sides of the regular polygonal shape of the locking portion is the same as the number of sides of the second through hole.

6. The belt sander according to claim 5, wherein the locking portion is partially embedded in the second through hole.

7. The belt sander according to claim 5 or 6, wherein the volute is provided with a bottom plate, the bottom plate is provided with a through hole, the output end of the driving device penetrates the through hole and is located inside the volute, and the driving wheel is mounted on the output end.

8. The belt sander according to claim 7, wherein the bottom plate is provided with a mounting seat, the mounting seat is provided with a regular polygonal hole slot, and the hole slot is used for mounting the button module.

9. The belt sander according to claim 8, wherein the elastic component is arranged in the hole slot.

10. The belt sander according to claim 8 or 9, wherein the mounting seat of the bottom plate is provided with a receiving groove on the same side, and the side plate of the receiving groove close to the mounting seat side is provided with a limiting portion, and the limiting portion limits the rotation range of the first support module, and the second support module is arranged to extend along the axis direction of the handle.

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