Sanding machine

Abstract

The utility model relates to the technical field of electric grinding equipment, in particular to a sanding machine which comprises a machine base, a switch assembly and a grinding assembly connected to the end of the machine base, the switch assembly is connected with an electrical system of the machine base through a power line extending out of the machine base, a base of the switch assembly is detachably connected with the machine base, and the grinding assembly is provided with a quick release structure. The quick release structure locks the connection position between the two structural parts through elastic pre-tightening force. The mounting position of the switch assembly can be selected according to the standing position requirement of an operator during polishing, so that the operator can operate a switch key conveniently, the use flexibility is improved, the operator can further quickly disassemble a structural part needing to be disassembled and quickly carry out equipment cleaning and maintenance or abrasive belt replacement work, and the beneficial effects of being simple in structure, convenient to operate and high in practicability are achieved. And the practicability is high.

Description

Technical Field

[0001] This application relates to the field of electric grinding equipment technology, and in particular to a sander. Background Technology

[0002] Sanding machines, as an indispensable and efficient tool in the field of wood processing and surface treatment, are known for their precise grinding capabilities and excellent surface smoothness. Through precise sanding belt and sanding disc operations, sanding machines not only significantly improve the smoothness of workpieces, but also greatly simplify the wood processing process. They are one of the indispensable pieces of equipment in the modern furniture manufacturing and decoration industry.

[0003] In existing technologies, sanding machines are mainly classified into disc sanders and belt sanders based on sanding methods. Sanding discs and belts are core consumables in grinding equipment, gradually wearing down during use and requiring regular maintenance and replacement based on usage. The ease of maintenance and replacement directly affects the operating costs and efficiency of the equipment. However, limitations in the support and body structure of existing equipment make belt replacement cumbersome and time-consuming, causing unnecessary trouble and cost burdens for operators. Furthermore, this design limits the flexibility and scalability of grinding equipment in various application scenarios, failing to meet the diverse and customized needs of different users.

[0004] Therefore, in view of the shortcomings in the support and body structure design of existing grinding equipment, it is necessary to carry out technical improvements and innovations to achieve rapid disassembly and replacement of sanding belts and sanding discs, improve the maintenance efficiency and flexibility of the equipment, and thus meet users' pursuit of higher performance and convenience of grinding equipment. Utility Model Content

[0005] The purpose of this application is to provide a sanding machine to solve the problems of unreasonable structural design, low assembly efficiency, and inconvenient operation in the prior art.

[0006] The embodiments of this application can be implemented through the following technical solutions:

[0007] A sander includes a base, a switch assembly, and a grinding assembly connected to the end of the base. The switch assembly is connected to the electrical system of the base via a power cord extending to the outside of the base, and the base of the switch assembly is detachably connected to the base.

[0008] The grinding assembly is equipped with a quick-release structure, which locks the connection position between the two structural components by elastic preload.

[0009] Furthermore, the switch assembly is connected to the top or side of the base.

[0010] Furthermore, the machine base is equipped with a dual-shaft extension motor, and the two output ends of the motor are respectively connected to grinding components. One of the grinding components is a belt grinding fixture, and the other grinding component is one of a belt grinding fixture, a disc grinding fixture, or a grinding wheel grinding fixture.

[0011] Furthermore, a first support sleeve is provided at one end of the machine base, and the first support sleeve is detachably connected to the first connecting end cover of the belt grinding fixture.

[0012] The belt grinding fixture also includes a drive roller, a belt support, a guide support, and a driven roller. One output shaft of the motor inside the machine base passes through one end of the first connecting end cover and is fixedly connected to the drive roller. The other end of the first connecting end cover is connected to the belt support. The drive roller and the driven roller are respectively disposed at both ends of the belt support. The belt is sleeved on the outside of the drive roller and the driven roller. The driven roller adjusts the rotational connection position between the driven roller and the belt support through the guide support. The guide support is a quick-release structure with elastic preload.

[0013] Furthermore, the sanding belt support includes a positioning opening groove and a roller support. The positioning opening groove is disposed at the end of the sanding belt support and extends to the end in an open shape along the translational direction of the sanding belt. The driven roller is rotatably connected to the roller support and is installed at the positioning opening groove.

[0014] The guide bracket includes a threaded connecting rod. One end of the threaded connecting rod is connected to a lever and a first elastic preload, and the other end is fixed to the connection position on the roller bracket by two positioning nuts. A spring is sleeved between the two ends. The other ends of the lever and the first elastic preload are respectively connected to the two sides of the sanding belt bracket and continuously provide tension to the roller bracket through the threaded connecting rod.

[0015] Furthermore, the sanding belt support also includes a first limiting groove, which extends along the translational direction of the sanding belt. One end of the lever is connected to the first limiting groove, and by changing the position of the lever within the first limiting groove, the threaded connecting rod is displaced.

[0016] Furthermore, the sanding belt support also includes at least one partition plate, which is disposed on the back of the sanding belt support. The partition plate is provided with a through mounting hole, through which the threaded connecting rod and the spring pass and move along the axial direction of the threaded connecting rod within the hole.

[0017] Furthermore, the belt grinding fixture also includes a dust collection hood, which is fitted outside the drive roller and connected to the side of the first connecting end cover. The dust collection hood consists of a side dust collection cover, an upper cover, and a lower cover. The upper cover and the side dust collection cover are detachably connected as one unit through a quick-release structure.

[0018] Furthermore, the upper cover and the side dust collection cover are detachably connected by a first spring and a second spring that cooperate with each other. The middle of the first spring and the second spring both protrude outward and are detachably connected by interference fit, wedge-shaped tooth engagement, or arc-shaped surface contact.

[0019] Furthermore, one side of the lower cover is connected to the side of the first connecting end cover, and the other side is hinged to the side dust collection cover. The upper cover is detachably connected to the top of the lower cover by connecting screws.

[0020] The sander provided in the embodiments of this application has at least the following beneficial effects:

[0021] This application allows for selection of the installation position of the switch assembly based on the operator's stance requirements during grinding, facilitating the operation of the switch buttons, increasing the flexibility of use, and enabling the operator to quickly disassemble the structural components to carry out cleaning and maintenance of the equipment or replace the sanding belt. It has advantages such as simple structure, convenient operation, easy assembly, and strong practicality. Attached Figure Description

[0022] Figure 1a , Figure 1b This is a schematic diagram of the overall structure of a sander according to different application scenarios of this application;

[0023] Figure 2 This is a schematic diagram of the overall structure of the sand disc and belt sander combination structure in this application;

[0024] Figure 3 This is an exploded view of the combined structure of the sand disc and belt sander in this application;

[0025] Figure 4 This is a schematic diagram of the quick-release structure in the application of belt grinding tooling in this application;

[0026] Figure 5 , Figure 6 These are schematic diagrams of the quick-release structure in this application from different perspectives in the application of the dust collection hood.

[0027] Numbers in the diagram

[0028] 1-Machine base; 11-First support sleeve; 2-Switch assembly; 3-Belt grinding fixture; 30-Drive roller; 31-Belt sander; 311-First limiting groove; 312-Positioning opening groove; 313-Roller bracket; 314-Partition plate; 32-Dust hood; 321-Side dust collection cover; 3211-U-shaped groove; 3212-Second spring; 322-Upper cover; 3222-First spring; 32 3-Lower cover; 324-Positioning screw; 325-Connecting screw; 33-Abrasive belt; 34-Grinding limit plate; 35-First connecting end cap; 36-Guide bracket; 361-Pulley; 362-First elastic preload; 363-Threaded connecting rod; 364-Spring; 365-First positioning nut; 366-Second positioning nut; 37-Driven roller; 4-Abrasive disc grinding fixture; 5-Abrasive wheel grinding fixture. Detailed Implementation

[0029] The present application will now be further described based on preferred embodiments and with reference to the accompanying drawings.

[0030] In addition, for ease of understanding, various components on the drawings have been enlarged (thickened) or reduced (thinned), but this is not intended to limit the scope of protection of this application.

[0031] Singular forms of words also include plural meanings, and vice versa.

[0032] In the description of the embodiments of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, in the description of this application, in order to distinguish different units, the terms "first," "second," etc. are used in this specification, but these are not limited by the manufacturing order, nor should they be construed as indicating or implying relative importance. Their names may differ in the detailed description and claims of this application.

[0033] The vocabulary used in this specification is for illustrative purposes and is not intended to limit the scope of this application. It should also be noted that, unless otherwise expressly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection via an intermediate medium; or they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of these terms in this application.

[0034] Figure 1a , Figure 1b This is a schematic diagram of the overall structure of a sander in different application scenarios according to this application, such as... Figure 1a , 1b As shown, a sander includes a base 1, a switch assembly 2, and grinding assemblies respectively connected to the ends of the base 1. The switch assembly 2 is connected to the electrical system of the base 1 via a power cord extending to the outside of the base 1. The base of the switch assembly 2 is detachably connected to the base 1. The switch assembly 2 can be connected to the top of the base 1 or to the side of the base 1, preferably the front side and the top, so that the operator can choose the installation position of the switch assembly 2 according to the standing position requirements during sanding, so as to facilitate the operation of the switch button and increase the flexibility of use.

[0035] Furthermore, the grinding assembly is equipped with a quick-release structure, which locks the connection between the two structural components with an elastic preload, allowing the operator to quickly disassemble the structural components to be disassembled and quickly carry out cleaning and maintenance of the equipment or replace the sanding belt.

[0036] In some preferred embodiments, a dual-shaft extension motor is provided in the base 1, and the two output ends of the motor are respectively connected to grinding components. The grinding components are one of the following: belt grinding fixture 3, disc grinding fixture 4, or wheel grinding fixture 5. That is, it can be a combination structure of dual belts, a combination structure of disc and belt sander, or a combination structure of belt and wheel sander.

[0037] The quick-release structure in this application will be described in detail below with reference to its specific structure.

[0038] Specifically, Figure 2 This is a schematic diagram of the overall structure of the sand disc and belt sander combination structure in this application. Figure 3 This is an exploded view of the combined structure of the sander belt sander in this application, as shown below. Figure 2 , Figure 3As shown, a first support sleeve 11 is provided at one end of the machine base 1. The first support sleeve 11 is detachably connected to the belt grinding fixture 3. The belt grinding fixture 3 includes a drive roller 30, a belt support 31, a dust collection hood 32, a sanding belt 33, a grinding limiting plate 34, a first connecting end cover 35, a guide bracket 36, and a driven roller 37. One end of the first connecting end cover 35 is connected to the first support sleeve 11, and an output shaft of a motor inside the machine base 1 extends through the first connecting end cover 35 and is fixedly connected to the drive roller 30. The other end of the first connecting end cover 35 is connected to the belt support 31 and the grinding limiting plate 37. 4. The top of the grinding limiting plate 34 extends to the upper part of the sanding belt bracket 31 and is laterally arranged. The driving roller 30 is located at one end of the sanding belt bracket 31, and the other end of the sanding belt bracket 31 is rotatably connected to the driven roller 37. The driven roller 37 is adjusted to the connection position with the sanding belt bracket 31 by the guide bracket 36. The sanding belt 33 is sleeved on the outside of the driving roller 30 and the driven roller 37. The guide bracket 36 is a quick-release structure with elastic pre-tightening force, so that by adjusting the length of the guide bracket 36, sanding belts that are too long or too short than the standard length can be adapted, thereby increasing the adaptability of the sanding belt.

[0039] In some preferred embodiments, please refer to Figure 4 The sanding belt support 31 includes a positioning opening groove 312 and a roller support 313. The positioning opening groove 312 is disposed at the end of the sanding belt support 31 and extends to the end in an open shape along the translational direction of the sanding belt 33. The driven roller 37 is rotatably connected to the roller support 313. The two side plates of the roller support 313 are installed at the positioning opening groove 312, and the installation position of the driven roller 37 at the end of the sanding belt support 31 is adjusted by the guide bracket 36.

[0040] In some preferred embodiments, the guide bracket 36 includes a lever 361, a first elastic pretensioner 362, a threaded connecting rod 363, a spring 364, a first positioning nut 365, and a second positioning nut 366. The threaded connecting rod 363 has a spring 364 sleeved in its middle. One end of the connecting rod is connected to the lever 361 and the first elastic pretensioner 362, and the other end is fixed to the roller bracket 313 by two positioning nuts. The other ends of the lever 361 and the first elastic pretensioner 362 are respectively connected to both sides of the sanding belt bracket 31. The connection point between the lever 361 and the first elastic pretensioner 362 serves as a fulcrum. Under the action of the first elastic pretensioner 362, the first elastic pretensioner 362 continuously moves towards the roller bracket 313. The threaded connecting rod 363 and the roller bracket 313 provide a pulling force towards the position of the drive roller 30, while the spring 364 provides a reverse supporting force to the two nuts. Since the first positioning nut 365 and the second positioning nut 366 are located on both sides of the bottom plate of the sanding belt bracket 31, the installation position of the roller bracket 313 relative to the end of the sanding belt bracket 31 can be adjusted by adjusting the connection position of the first positioning nut 365 and the second positioning nut 366 on the threaded connecting rod 363. This allows for fine adjustment of the distance between the drive roller 30 and the driven roller 37, and ensures that the relative position between them is stable and reliable under the action of the two elastic elements, so as to adapt to sanding belts of different sizes and specifications.

[0041] In some preferred embodiments, the sanding belt support 31 further includes a first limiting groove 311, which extends along the translational direction of the sanding belt 33. One end of the lever 361 is connected to the first limiting groove 311. By pushing the lever 361 along the translational direction of the sanding belt 33 to the position within the first limiting groove 311, the position of the fulcrum can be changed, thereby driving the threaded connecting rod 363 to move and achieving a significant adjustment of the distance between the driving roller 30 and the driven roller 37. When the fulcrum moves from a position adjacent to the driven roller 37 to a position away from the driven roller 37, the distance between the driving roller 30 and the driven roller 37 decreases, at which point the sanding belt can be disassembled and assembled.

[0042] In some preferred embodiments, the sanding belt support 31 further includes at least one partition 314, which is disposed on the back side of the sanding belt support 31. The partition 314 has a through mounting hole, through which the threaded connecting rod 363 and the spring 364 pass. The threaded connecting rod 363 and the spring 364 pass through the mounting hole of the partition 314 and move axially within the hole along the threaded connecting rod 363. The mounting hole guides the displacement of the threaded connecting rod 363.

[0043] In some preferred embodiments, the belt grinding fixture 3 further includes a dust collection hood 32, which is sleeved around the drive roller 30 and connected to the side of the first connecting end cover 35, such as... Figure 5 , Figure 6 As shown, the dust collection hood 32 includes a side dust collection cover 321, an upper cover 322, and a lower cover 323. One side of the lower cover 323 is connected to the side of the first connecting end cover 35, and the other side is hinged to the side dust collection cover 321. The upper cover 322 is detachably connected to the top of the lower cover 323 by connecting screws 325, so that the sawdust inside can be cleaned by opening the upper cover 322, and the sanding belt can be replaced quickly. Compared with the one-piece structure dust collection hood 32, it has the advantages of simple operation and strong practicality.

[0044] In some preferred embodiments, the upper cover 322 and the side dust collection cover 321 are detachably connected by a first spring 3222 and a second spring 3212 that cooperate with each other. The middle parts of the first spring 3222 and the second spring 3212 both protrude outward and cooperate with each other in a quick-release structure by means of interference fit, wedge-shaped tooth engagement or arc surface contact. For example, under the action of force, the two springs deform until they are closed. The protrusion of the second spring 3212 is limited to the inside of the first spring 3222 by the protrusion of the first spring 3222, so that the side dust collection cover 321 will not fold outward and open. It will only open under the action of external force.

[0045] In some preferred embodiments, the side dust collection cover 321 has a U-shaped groove 3211 on its side, and the positioning screw 324 is connected to the sanding belt bracket 31 through the U-shaped groove 3211. This increases the flexibility and adjustability of the connection position and enhances the stability of the connection through the positioning screw 324.

[0046] The specific embodiments of this application have been described in detail above. For those skilled in the art, several improvements and modifications can be made to this application without departing from the principle of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A sander, characterized in that, The sanding machine comprises a base (1), a switch assembly (2) and a grinding assembly connected to the end of the base (1), the switch assembly (2) is connected with the electrical system of the base (1) through the power line extending to the outside of the base (1), and the base of the switch assembly (2) is detachably connected with the base (1). The grinding assembly is provided with a quick release structure which locks the connecting position between two structural members through elastic pre-tightening force.

2. The sanding machine according to claim 1, wherein: The switch assembly (2) is connected to the top or side of the base (1).

3. The sanding machine according to claim 1, wherein: The base (1) is provided with a double-shaft extension motor, and the two output ends of the motor are respectively connected with grinding assemblies, one of which is a sand belt grinding tool (3), and the other of which is one of a sand belt grinding tool (3), a sand disc grinding tool (4) or a sand wheel grinding tool (5).

4. The sanding machine according to claim 3, wherein: One end of the base (1) is provided with a first support sleeve (11), and the first support sleeve (11) is detachably connected with a first connecting end cover (35) of the sand belt grinding tool (3). The sand belt grinding tool (3) further comprises a driving roller (30), a sand belt support (31), a guide support (36) and a driven roller (37), one output shaft of the motor in the base (1) is fixedly connected with the driving roller (30) through one end of the first connecting end cover (35), the other end of the first connecting end cover (35) is connected with the sand belt support (31), the driving roller (30) and the driven roller (37) are respectively arranged at two ends of the sand belt support (31), a sand belt (33) is sleeved outside the driving roller (30) and the driven roller (37), the driven roller (37) adjusts the rotary connecting position of the driven roller (37) and the sand belt support (31) through the guide support (36), and the guide support (36) is a quick release structure with elastic pre-tightening force.

5. The sanding machine according to claim 4, wherein: The sand belt support (31) comprises a positioning open slot (312) and a roller support (313), the positioning open slot (312) is arranged at the end of the sand belt support (31) and extends to the end in an open manner along the translation direction of the sand belt (33), and the driven roller (37) is rotatably connected with the roller support (313) and is installed at the positioning open slot (312). ​ The guide bracket (36) comprises a threaded connecting rod (363), one end of the threaded connecting rod (363) is connected with a shifting rod (361) and a first elastic pre-tightening element (362), the other end is fixed to the connecting position of the roller bracket (313) through two positioning nuts, and a spring (364) is sleeved between the two end portions, the shifting rod (361) and the other end of the first elastic pre-tightening element (362) are connected to the two sides of the abrasive belt bracket (31) respectively, and the threaded connecting rod (363) continuously provides a pulling force to the roller bracket (313).

6. The sander according to claim 5, characterized in that: The abrasive belt bracket (31) further comprises a first limiting long slot (311) extending along the translation direction of the abrasive belt (33), one end of the shifting rod (361) is connected to the first limiting long slot (311), and the position of the shifting rod (361) in the first limiting long slot (311) is changed to drive the threaded connecting rod (363) to displace.

7. The sander according to claim 6, characterized in that: The abrasive belt bracket (31) further comprises at least one partition plate (314), at least one partition plate (314) is arranged on the back surface of the abrasive belt bracket (31), and the partition plate (314) is provided with a mounting hole penetrating therethrough, the threaded connecting rod (363) and the spring (364) pass through the mounting hole of the partition plate (314) and displaceably move in the axial direction of the threaded connecting rod (363) in the hole.

8. The sander according to claim 4, characterized in that: The abrasive belt grinding tool (3) further comprises a dust collecting cover (32), the dust collecting cover (32) is sleeved outside the driving roller (30) and connected to the side surface of the first connecting end cover (35), the dust collecting cover (32) is composed of a side dust collecting cover (321), an upper cover (322) and a lower cover body (323), and the upper cover (322) and the side dust collecting cover (321) are detachably connected as a whole through a quick release structure.

9. The sander according to claim 8, characterized in that: The upper cover (322) and the side dust collecting cover (321) are detachably connected through a first elastic sheet (3222) and a second elastic sheet (3212) matched with each other, the middle portions of the first elastic sheet (3222) and the second elastic sheet (3212) are outwardly protruded, and the detachable connection is achieved through interference fit or wedge-shaped tooth engagement or circular arc surface contact.

10. The sander according to claim 9, characterized in that: One side surface of the lower cover body (323) is connected to the side surface of the first connecting end cover (35), and the other side surface is hingedly connected to the side dust collecting cover (321), and the upper cover (322) is detachably connected to the top of the lower cover body (323) through a connecting screw (325).

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