Foldable belt sander

Abstract

The invention discloses a foldable belt sander which comprises a handle, a belt sander body, a belt sander body, a belt sander body, a belt sander body, a belt sander body and a belt sander body. The main shell is arranged on the side, away from the base, of the handle, an annular first mounting groove is formed in the end of the main shell, a mounting part is arranged on the inner side of the first mounting groove, a second through hole is formed in the inner side of the mounting part, and a second mounting groove extending in the circumferential direction of the main shell is formed in the side, close to the first mounting groove, of the main shell; the second mounting groove is communicated with the first mounting groove through the through hole; the volute is provided with a bottom plate, a first through hole is formed in the bottom plate, one side of the bottom plate is provided with a first side wall which extends outwards and surrounds the first through hole, the end side of the bottom plate is provided with a first recess and at least one second recess, and the first side wall is embedded into the first mounting groove; and the locking switch assembly is installed in the second installation groove, and a spherical part of the locking switch assembly penetrates through the through hole to be embedded into the first concave part or the second concave part so as to fix the volute. The volute can rotate within the range of 0-180 degrees.

Description

Technical Field

[0001] The present application relates to the field of handheld electric tools, and in particular to a foldable belt sander. Background Art

[0002] Belt sanding is also called belt sanding. It has good heat dissipation, high sanding efficiency, wide application, and is suitable for sanding flat surfaces and relatively regular surfaces of objects. The current belt sander includes a main housing, on which a working head assembly is mounted. The working head assembly can rotate. The current working head assembly can rotate at an angle within the range of 0-90° to meet the operating requirements. In this way, the working head assembly is either arranged in series with the handle or perpendicular to the axis of the handle. In this way, the volume of the storage box in which it is placed is high, and a large-capacity storage box is required, which increases the transportation cost.

[0003] For this reason, it is necessary to improve the existing belt sander. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings, the purpose of the present application is to provide a foldable belt sander, which can reduce the volume requirement for the storage box and is easy to operate.

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

[0006] A foldable belt sander comprising:

[0007] A handle, one side of the handle having a base, the base being used to mount a battery pack;

[0008] A main housing, which is arranged on the side of the handle away from the base, an annular first mounting groove is arranged at the end of the main housing, a mounting portion is arranged inside the first mounting groove, a second through hole is arranged inside the mounting portion, a second mounting groove is arranged on the side of the main housing close to the first mounting groove and extends along the circumference of the main housing, and the second mounting groove is connected to the first mounting groove through the through hole;

[0009] A volute, wherein the volute has a bottom plate, the bottom plate has a first through hole, one side of the bottom plate has a first side wall extending outward and surrounding the first through hole, a first recess and at least one second recess are provided on the first side wall away from the bottom plate, and the first side wall is embedded in the first mounting groove; and

[0010] A locking switch assembly is installed in the second installation groove, and a spherical component of the locking switch assembly is embedded in the first recess or the second recess through the through hole to fix the volute.

[0011] In one embodiment, the number of the second recesses is between 6 and 15.

[0012] In one embodiment, the belt sander has a second recess disposed opposite to the first recess at an end of the first side wall.

[0013] In one embodiment, the spherical component of the locking switch assembly is embedded in the first recess through the through hole, and the belt sander is in a storage state.

[0014] In one embodiment, a driving device is provided in the main housing, an output end of the driving device passes through the second through hole and the first through hole, and a driving wheel is installed on the output end.

[0015] In one embodiment, a tensioning module and a bracket module are provided on the volute, and a roller of the bracket module protrudes from the volute.

[0016] The abrasive belt is sleeved on the roller of the support module and the driving wheel, and the tensioning module is used to adjust the abrasive belt.

[0017] In one embodiment, a first recess and at least one second recess are provided on an end portion or an end side or a side wall of the end side of the first side wall away from the bottom plate.

[0018] In one embodiment, a guide portion is disposed on the first side wall, one side of the guide portion has a transition portion, the transition portion is close to the first recess, and the other side of the guide portion has a step.

[0019] In one embodiment, the foldable belt sander further comprises a disc-shaped baffle.

[0020] The volute is fixed to the mounting portion through the baffle.

[0021] The bottom plate of the volute has a second side wall on a side away from the first side wall, and the width of the second side wall is greater than the width of the sanding belt.

[0022] In one embodiment, the locking switch assembly includes a locking switch, a fixing bracket, a locking component and a spherical component;

[0023] The locking switch has a trigger end, the trigger end is connected to one end of the elastic component, the other end of the elastic component abuts against the spherical component, and the spherical component is embedded in the first recess or the second recess through the through hole;

[0024] The locking switch is installed in the second installation groove and can slide along the guide groove in the second installation groove.

[0025] The fixing bracket is fixed to the end of the second mounting groove through a locking component.

[0026] In one embodiment, a switch button is provided on the handle, the switch button is connected to the first end of the connecting rod in the handle, the second end of the connecting rod is used as a trigger end for triggering a micro switch, and the micro switch is electrically connected to the control module.

[0027] A blocking member is disposed on the first end side of the connecting rod, and the blocking member abuts against the first side wall at a side away from the first end side.

[0028] The blocking member is configured to rotate the volute so that the blocking member abuts against the first end or is disengaged from the first end.

[0029] Beneficial Effects

[0030] The belt sander proposed in the present application can rotate within the range of 0-180° with the axis of the handle by optimizing the mechanism of the volute, thereby improving the user experience. When in the storage state, the working head assembly is arranged in parallel with the handle, which reduces the length of the belt sander in disguise, thereby reducing the volume of the storage box and reducing the transportation cost (one box or container can accommodate more belt sanders during transportation). BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are used to provide an understanding of the technical solution of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the technical solution of the present disclosure and do not constitute a limitation on the technical solution of the present disclosure. The shapes and sizes of the components in the accompanying drawings do not reflect the actual proportions and are only intended to illustrate the content of the present application.

[0032] Figure 1 , 2 It is a three-dimensional schematic diagram of a belt sander according to an embodiment of the present application;

[0033] Figure 3 , 4 This is a three-dimensional schematic diagram of the belt sander according to the embodiment of the present application in the folding mode with the battery pack hidden;

[0034] Figure 5 This is a schematic diagram of the volute being installed on the main housing of the present application;

[0035] Figure 6 5 is a schematic diagram of the main housing with the volute hidden;

[0036] Figure 7 The schematic diagram of Figure 6 with the driving wheels hidden;

[0037] Figure 8 This is a schematic diagram of 7 with the baffle hidden;

[0038] Figure 8a Schematic diagram of 8 at one viewing angle

[0039] Fig. 98 is a schematic diagram in which part of the main housing is hidden;

[0040] Fig.10 A schematic diagram of a volute according to an embodiment of the present application;

[0041] Fig.11 Schematic diagram of Figure 8 with another part of the main shell hidden

[0042] Fig.12 This is a schematic diagram of a belt sander according to an embodiment of the present application, with part of the main housing hidden;

[0043] Fig.13 This is a schematic diagram of a belt sander according to an embodiment of the present application without the volute;

[0044] Fig.14 It is a structural schematic diagram of the volute of the belt sander in the storage state according to an embodiment of the present application. DETAILED DESCRIPTION

[0045] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the present application and are not limited to the scope of the present application. The implementation conditions adopted in the examples can be further adjusted as the conditions of the specific manufacturer, and the unspecified implementation conditions are usually the conditions in conventional experiments.

[0046] Next, combine with Figure 1-Figure 13 The foldable belt sander (hereinafter referred to as belt sander) proposed in the present application is described.

[0047] like Figure 1 and 2 FIG. 1 is a three-dimensional schematic diagram of a belt sander according to an embodiment of the present application.

[0048] The belt sander includes a handle 110, one side of which has a base 111, and the base 111 is equipped with a battery pack 200. The battery pack 200 includes a plurality of regularly arranged lithium-based cells. Preferably, the battery pack 200 includes a solid-state battery.

[0049] The handle has a main housing 120 on the side away from the base 111 , and a driving device (such as a driving motor) is disposed inside the main housing 120 .

[0050] The handle is provided with a switch button 130, which is electrically connected to a control module (not shown) in the handle. In one embodiment, the switch button 130 may be an integrated switch with an integrated speed control function to meet the needs of different occasions (the speed of the sanding belt is between 120-470 m / min). In one embodiment, the control module may be located on the side of the base 111. The base 111 is equipped with a battery pack 200. The handle has a blocking member, which restricts the switch button 130 when in the storage state (i.e., it cannot be turned on at this time).

[0051] A volute 140 is installed at one end of the main housing 120, and the output end of the drive motor passes through the volute 140 and is located inside the volute 140, and a driving wheel is installed on the output end. The drive motor can be a brushless motor. In one embodiment, the drive motor is matched and connected to a gearbox. The main housing 120 has a heat dissipation port on the side away from the volute 140, through which the heat of the drive motor is dissipated.

[0052] The volute 140 is provided with a tensioning module 150 and a bracket module 180, and the roller portion of the bracket module protrudes from the volute 140. The sanding belt 170 is sleeved on the roller and driving wheel of the bracket module, and the sanding belt is adjusted by the tensioning module. The volute linkage blocking member is rotated to unlock the switch button 130 (the switch button can be pushed to turn on the machine).

[0053] A locking switch assembly 160 is provided on the side of the main housing 120 close to the volute 140. The volute 140 can be rotatably installed on the main housing 120, and the volute 140 can be locked by the switch assembly 160 (simplifying the structure of the locking device). In this way, the belt sander can be folded during transportation or storage. The volute 140 is rotated during operation, and then the operation is carried out (such as installing a battery pack). With such a design, it can rotate within the range of 0-180° with the axis of the handle. In the storage state, the volute and the handle are arranged side by side (0°), optimizing the volume of the packaging box (the transportable quantity can be adjusted at one time during transportation, reducing transportation costs). In addition, different rotation angles of the volute 140 can meet the grinding operations in different occasions and improve user experience. The main housing 120 is cylindrical.

[0054] Next, combine Figure 3-14 And refer to Figure 1 To describe the structure of a belt sander.

[0055] The volute 140 has a bottom plate 141, one side of the bottom plate 141 has a first side wall 142 extending outward (the bottom plate 141 has a first through hole, and the first side wall extends outward around the first through hole), and the side of the bottom plate 141 away from the first side wall 142 has a second side wall 143 extending outward, and the width (extended length) of the second side wall 143 is greater than the width of the sanding belt.

[0056] The first side wall 142 is provided with a first recess 142a and at least one second recess 142b (e.g., the number of the second recesses 142b is between 6 and 15, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15) on the side away from the bottom plate 141. The bottom plate 141 has a first through hole 141a and a groove 141b. The output end 121a of the drive motor 125 (the output end 121a can be the output end of the drive motor 125 or the output end after the speed reduction mechanism) passes through the first through hole 141a, and the driving wheel 121 is installed in the part located in the second side wall 143. The first recess 142a and the second recess 142b are arranged at intervals. The first side wall 142 is hollow and annular, and the middle part thereof surrounds the first through hole 141a. One side end of the second recess 142b has a recessed portion 141c, and the recessed portion 141c is provided with a positioning column 141d. Preferably, the end of the first side wall away from the bottom plate is provided with a first recess and at least one second recess (collectively referred to as recesses), or the end side of the first side wall away from the bottom plate (the recessed portion is located at the end portion and the side wall) is provided with a first recess and at least one second recess, or the side wall of the first side wall away from the bottom plate is provided with a first recess and at least one second recess.

[0057] The first side wall 142 is provided with a guide portion 142a, one side of the guide portion 142 has an inclined transition portion 142c1, the transition portion 142c1 is close to the first recess 142a, and the other side of the guide portion 142 has a step 142d.

[0058] The tensioning module 150 includes a tensioning switch 151 and a tensioning assembly 152. The tensioning switch 151 has a mounting end 151a and a pressing portion 151b. The mounting end 151a is sleeved on the positioning column 141d. When adjusting, the pressing portion 151b of the tensioning switch 151 is pressed. The tensioning assembly 152 is disposed on the side of the bottom plate 141 of the volute away from the driving motor 125. The tensioning assembly 152 has an output portion. The output portion passes through the groove 141b and abuts against the tensioning switch 151. When adjusting, the output portion of the tensioning switch 151 is pressed to slide in the groove 141b to adjust the tension of the sanding belt.

[0059] The end of the main shell 120 is provided with a first annular mounting groove 120a, the inner side of the first mounting groove 120a has a mounting portion 120b, the inner side of the mounting portion 120b has a second through hole 120c, the output end of the driving device (such as the driving motor 125) passes through the second through hole 120c and the first through hole 141a and is located in the volute, and a driving wheel is installed thereon.

[0060] The volute 140 is fixed to the mounting portion 120b through a baffle 122 (e.g., a mounting hole 122b is provided on the baffle 122, and a fixing member such as a bolt passes through the mounting hole 122b to fix the baffle 122, so as to fix the volute 140 to the end of the main housing 120). The baffle 122 has a positioning portion 122a, which protrudes toward the mounting portion 120b and is used for temporary fixing during installation, and then fixed by a fixing member. The baffle 122 is disc-shaped.

[0061] The main shell 120 has a second mounting groove 123 extending along its circumference on the side of the first annular mounting groove 120a close to it, and the bottom of the second mounting groove 123 has a through hole 124, which is connected to the first mounting groove 120a and is used to place a spherical component (such as a steel ball) 164.

[0062] The locking switch assembly 160 includes a locking switch 161 , a fixing bracket 162 , a locking component 163 and a spherical component 164 .

[0063] The locking switch 161 has a trigger end 161a, which is installed in the second mounting groove 123 and fixed by a fixing bracket 162. The locking switch 161 can slide in the second mounting groove 123 (a guide groove 123a is provided in the second mounting groove 123), and the trigger end 161a is connected to an elastic component, which abuts against a spherical component 164 (such as a steel ball). When the locking switch 161 is pressed, it can slide along the circumference of the surface of the main housing 120 (within a certain range to lock the volute or unlock the volute (the volute can be rotated at this time)). When the spherical component 164 is partially embedded in the first recess 142a, the belt sander is in a storage state. At this time, the end 134b of one side of the blocking member 134 abuts against the connecting rod 131b, and the machine cannot be turned on at this time (that is, the belt sander cannot be triggered due to the blocking of the blocking member 134 when it is in the storage state). If the belt sander needs to be turned on, the volute 140 is rotated first, and the step 142d on the first side wall squeezes the first end 134a of the blocking member 134. The first end 134a of the blocking member 134 is subjected to force, so that the second end 134b is forced to move, pushing the switch button 130 to move toward the main housing side, driving the connecting rod 131 to move, and the movement of the connecting rod 131 drives its trigger end 131a to move, so as to trigger the micro switch 132 (electrical control module), thereby turning on the machine (the belt sander is running).

[0064] The first side wall 142 of the volute 140 is embedded in the first mounting groove 120a and fixed to the mounting portion 120b by the baffle 122. The volute 140 can be rotated by pressing the locking switch 161. The spherical member 164 is embedded in the first recess 142a or the second recess 142b to adjust the posture of the volute 140 (for example, when embedded in the first recess 142a, it is in the storage state, see Figure 3, such as embedded in one of the second recesses 142b see Figure 2 Preferably, the spherical component is embedded in different second recesses 142b, so that the angle of the volute 140 can be adjusted to adapt to different operating conditions).

[0065] The above embodiments are only for illustrating the technical concept and features of the present application, and their purpose is to enable people familiar with the technology to understand the content of the present application and implement it accordingly, and they cannot be used to limit the protection scope of the present application. Any equivalent transformation or modification made according to the spirit of the present application shall be included in the protection scope of the present application.

Claims

1. A foldable belt sander, characterized in that: include: A handle, one side of the handle having a base, the base being used to mount a battery pack; A main housing, which is arranged on the side of the handle away from the base, an annular first mounting groove is arranged at the end of the main housing, a mounting portion is arranged inside the first mounting groove, a second through hole is arranged inside the mounting portion, a second mounting groove is arranged on the side of the main housing close to the first mounting groove and extends along the circumference of the main housing, and the second mounting groove is connected to the first mounting groove through the through hole; A volute, wherein the volute has a bottom plate, the bottom plate has a first through hole, one side of the bottom plate has a first side wall extending outward and surrounding the first through hole, a first recess and at least one second recess are provided on the side of the first side wall away from the bottom plate, and the first side wall is embedded in the first mounting groove; and, The locking switch assembly is installed in the second installation groove, and the spherical component of the locking switch assembly is embedded in the first recess or the second recess through the through hole.

2. The foldable belt sander according to claim 1, characterized in that The number of the second recesses is between 6 and 15.

3. The foldable belt sander according to claim 2, characterized in that The second recess is disposed opposite to the first recess on the first side wall.

4. The foldable belt sander according to claim 1, characterized in that: A first recess and at least one second recess are provided on an end portion or an end side or a side wall of the first side wall away from the bottom plate.

5. The foldable belt sander according to claim 1, characterized in that: The spherical component of the locking switch assembly is embedded in the first recess through the through hole, and the belt sander is in a storage state.

6. A foldable belt sander according to claim 4 or 5, characterized in that: The main housing has a driving device in it, the output end of the driving device passes through the second through hole and the first through hole, and a driving wheel is installed on the output end. The volute is provided with a tensioning module and a bracket module, and the roller of the bracket module protrudes from the volute. The abrasive belt is sleeved on the roller of the support module and the driving wheel, and the tensioning module is used to adjust the abrasive belt.

7. The foldable belt sander according to claim 1, characterized in that: A guide portion is disposed on the first side wall, one side of the guide portion has a transition portion, the transition portion is close to the first recess, and the other side of the guide portion has a step.

8. A foldable belt sander according to any one of claims 6 or 7, characterized in that Also includes a disc-shaped baffle, The volute is fixed to the mounting portion through the baffle. The bottom plate of the volute has a second side wall on a side away from the first side wall, and the width of the second side wall is greater than the width of the sanding belt.

9. The foldable belt sander according to claim 1, characterized in that: The locking switch assembly comprises a locking switch, a fixing bracket, a locking component and a spherical component; The locking switch has a trigger end, the trigger end is connected to one end of the elastic component, the other end of the elastic component abuts against the spherical component, and the spherical component is embedded in the first recess or the second recess through the through hole; The locking switch is installed in the second installation groove and can slide along the guide groove in the second installation groove. The fixing bracket is fixed to the end of the second mounting groove through a locking component.

10. The foldable belt sander according to claim 1, characterized in that The handle is provided with a switch button, the switch button is connected to the first end of the connecting rod in the handle, the second end of the connecting rod is used as a trigger end for triggering a micro switch, and the micro switch is electrically connected to a control module. A blocking member is disposed on the first end side of the connecting rod, and the blocking member abuts against the first side wall at a side away from the first end side. The blocking member is configured to rotate the volute so that the blocking member abuts against the first end or is disengaged from the first end.

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