Abrasive belt quick replacement mechanism and abrasive disc machine

Abstract

The utility model provides a kind of abrasive belt quick replacement mechanism and abrasive disc machine, including abrasive disc machine main body, the abrasive belt of abrasive disc machine main body pulley assembly is sleeved, the pulley assembly of abrasive disc machine main body includes fixed pulley and adjustable extension pulley, extension pulley is slidably connected with fixed pulley by connecting shaft, multiple groups of locking holes distributed along axial direction are opened on connecting shaft.The utility model uses fixed pulley and adjustable extension pulley cooperation connecting shaft sliding structure, realizes the effect that abrasive belt shaft length is adjustable, can be adapted to different width abrasive belt, without replacing entire pulley assembly due to abrasive belt width change, improve the ability of "one axis multi-adaptation", reduce equipment accessory cost;Through the cooperation of arc elastic sheet of petal type elastic baffle ring and micro spring, the effect that abrasive belt side edge is self-adapting clamped is realized, no matter how abrasive belt width, abrasive belt side edge can be automatically adhered, avoid the deviation caused by shaft body and abrasive belt gap when abrasive belt runs.

Description

Technical Field

[0001] This utility model belongs to the technical field of belt sander and sanding disc machine, and more specifically, it relates to a quick belt changing mechanism and a sanding disc machine. Background Technology

[0002] Chinese patent application CN202223524197.8 discloses a quick belt replacement mechanism and a belt sander, belonging to the technical field of belt sander machines. It solves the technical problems of complex belt disassembly and assembly, low efficiency, and excessively long disassembly and assembly time in existing technologies. This utility model includes a drive wheel and a driven wheel, with the sanding belt sleeved on both. It also includes a tensioning mechanism connected to the driven wheel, comprising a tensioning handle and an eccentric shaft assembly. The eccentric shaft assembly is connected to the driven wheel, and the tensioning handle is connected to the eccentric shaft assembly via a tensioning seat. This utility model features a compact, stable, reliable, simple, and convenient operation, saving time and effort. By setting up a tensioning mechanism and a cover plate locking handle, it achieves quick, tool-free belt replacement, greatly reducing the time and cumbersome steps required for belt replacement and improving the user experience.

[0003] The aforementioned utility model has significant limitations in terms of sanding belt width adaptability. The sanding belt replacement mechanism and sanding disc machine structure design in this patent are relatively fixed. The dimensions and relative positions of components such as the drive wheel, driven wheel, and tensioning mechanism are optimized only for sanding belts of specific widths. When faced with sanding belts of different widths, the provided mechanism is difficult to adapt effectively. For example, for sanding belts that are too narrow or too wide, the existing adjustment method of this mechanism cannot maintain good tension and operational stability of the sanding belt on the pulley. Narrow sanding belts may deviate or slip during operation, while wide sanding belts may not be able to be installed properly, or after installation, the sanding belt may be easily worn or broken due to excessive tightness, and the pulley may be overloaded, seriously affecting the normal operation and service life of the equipment.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a quick belt changing mechanism and sanding machine in order to achieve a more practical purpose. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a quick-change mechanism for sanding belts and a sanding disc machine, which is achieved by the following specific technical means: A quick-change sanding belt mechanism and a sanding disc machine include a sanding disc machine body and a sanding belt sleeved on the pulley assembly of the sanding disc machine body. The pulley assembly of the sanding disc machine body includes a fixed pulley and an adjustable extension pulley. The extension pulley is slidably connected to the fixed pulley through a connecting shaft. The connecting shaft has multiple sets of locking holes distributed axially. A locking pin is movably inserted through the side wall of the extension pulley at the position corresponding to the locking hole. The locking pin is adapted to the locking hole to lock the position of the extension pulley. A spring is sleeved on the outside of the connecting shaft.

[0006] Preferably, a limiting block is installed on the side wall of the connecting shaft, and the limiting block is detachably connected to the side wall of the connecting shaft by bolts.

[0007] Preferably, the end of the locking pin is provided with annular anti-slip texture, the end of the locking pin away from the locking hole is slidably fitted with a sliding block, the bottom outer wall of the locking pin is connected to a retaining block, the spring is abutted between the top side of the retaining block and the bottom side of the sliding block, and the inner side wall of the sliding block is wrapped with a rubber anti-slip sleeve.

[0008] Preferably, a conical dust hopper is installed on the side wall of the extension pulley, the inner wall of the dust hopper is inclined, and the first opening of the dust hopper is located away from the extension pulley.

[0009] Preferably, the top of the dust hopper is provided with a through hole matching the top of the connecting shaft, the top of the connecting shaft passes through the through hole, and the outer wall of the top and the inner wall of the through hole are slidably connected.

[0010] Preferably, the dust hopper has a petal-shaped elastic retaining ring installed on the side near the extension pulley; the petal-shaped elastic retaining ring is composed of six arc-shaped elastic steel sheets, the root of the arc-shaped elastic steel sheets is connected to one side of the dust hopper through a hinge, and the end of the arc-shaped elastic steel sheets is slightly curved outward of the sand belt; a micro spring is connected to the inner side of the arc-shaped elastic steel sheet, and the end of the micro spring away from the arc-shaped elastic steel sheet is fixed to one side of the extension pulley.

[0011] Compared with the prior art, the present invention has the following beneficial effects: This invention utilizes a sliding structure that connects a fixed pulley and an adjustable extension pulley to the shaft, achieving adjustable sanding belt shaft length. This allows for adaptation to sanding belts of different widths, eliminating the need to replace the entire pulley assembly due to changes in sanding belt width. This enhances the "one shaft, multiple adaptations" capability and reduces equipment accessory costs. Furthermore, the use of a petal-shaped elastic retaining ring with an arc-shaped elastic steel sheet and a micro-spring enables self-adaptive clamping of the sanding belt side. Regardless of the sanding belt width, it automatically conforms to the sanding belt side, preventing belt misalignment caused by gaps between the shaft and the sanding belt during operation. Simultaneously, the arc-shaped structure reduces friction with the sanding belt, minimizing wear on the sanding belt side. This invention achieves precise locking of the extension pulley position by using a locking pin in conjunction with multiple sets of locking holes on the connecting shaft. The advantage is that after the sanding belt shaft is adjusted to the target length, the extension pulley position can be quickly fixed, preventing pulley displacement during sanding belt operation, ensuring stable sanding belt operation, and requiring no tools, thus improving sanding belt replacement efficiency. Furthermore, the conical dust hopper on the side wall of the extension pulley works in conjunction with the main body of the sanding machine to achieve dust collection during sanding. The inclined design of the dust hopper's inner wall guides dust to slide down and be collected, preventing dust from entering the connecting shaft extension. Attached Figure Description

[0012] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0013] Figure 2 This is a side sectional view of the present invention. Figure 1 .

[0014] Figure 3 This is a side sectional view of the present invention. Figure 2 .

[0015] Figure 4 yes Figure 2 Enlarged schematic diagram of structure A in the middle.

[0016] In the diagram, the correspondence between component names and drawing numbers is as follows: 1. Sanding disc machine; 2. Sanding belt; 3. Dust hopper; 4. Limiting block; 5. Locking pin; 6. Connecting shaft; 7. Locking hole; 8. Spring; 9. Clamping block; 10. Sliding block; 11. Pulley; 12. Extension pulley. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Example: As attached Figure 1 To be continued Figure 4 As shown: This utility model provides a quick-change sanding belt mechanism and a sanding machine, including a sanding machine body 1 and a sanding belt 2 sleeved on the pulley assembly of the sanding machine body 1. The pulley assembly of the sanding machine body 1 includes a fixed pulley 11 and an adjustable extension pulley 12. The extension pulley 12 is slidably connected to the fixed pulley 11 through a connecting shaft 6. The connecting shaft 6 has multiple sets of locking holes 7 distributed axially. A locking pin 5 is movably inserted through the side wall of the extension pulley 12 corresponding to the position of the locking hole 7. The locking pin 5 is adapted to the locking hole 7 to lock the position of the extension pulley 12. A spring 8 is sleeved on the outside of the connecting shaft 6.

[0019] Among them, a limiting block 4 is installed on the side wall of the connecting shaft 6. The limiting block 4 is detachably connected to the side wall of the connecting shaft 6 by bolts. The detachable connection between the limiting block 4 and the side wall of the connecting shaft 6 by bolts achieves the effect of precisely limiting the sliding stroke of the extension pulley 12. The advantage is that it can prevent the extension pulley 12 from falling out of the assembly range due to excessive displacement when sliding along the connecting shaft 6, thus ensuring the operational stability of the pulley assembly. At the same time, the detachable bolt design makes it easy to replace the limiting block 4 of different specifications according to the width adjustment requirements of the sanding belt 2, improving the flexibility of structural adaptation and reducing the cost of parts replacement.

[0020] The locking pin 5 has an annular anti-slip texture at its end. A sliding block 10 is slidably fitted onto the end of the locking pin 5 away from the locking hole 7. A retaining block 9 is connected to the outer wall of the bottom end of the locking pin 5. A spring 8 is abutted between the top side of the retaining block 9 and the bottom side of the sliding block 10. The inner wall of the sliding block 10 is wrapped with a rubber anti-slip sleeve. By having an annular anti-slip texture at the end of the locking pin 5 and a sliding block 10 with a rubber anti-slip sleeve fitted onto the end away from the locking hole 7, and with the spring 8 abutting between the retaining block 9 and the sliding block 10, the locking pin 5 achieves a dual improvement in both ease of operation and locking stability. The annular anti-slip texture and the rubber anti-slip sleeve can increase the friction of hand operation, prevent slippage when inserting or removing the locking pin 5, and improve the efficiency of sanding belt replacement. The elastic force of the spring 8 can push the locking pin 5 to automatically tighten against the locking hole 7, preventing the locking pin 5 from loosening during the operation of the sanding machine and causing the extension pulley 12 to shift, thus ensuring the stable operation of the sanding belt 2.

[0021] The side wall of the extension pulley 12 is equipped with a conical dust hopper 3. The inner wall of the dust hopper 3 is inclined, and the opening of the dust hopper 3 is located away from the extension pulley 12. By installing the conical dust hopper 3 with an inclined inner wall and an opening away from the extension pulley 12 on the side wall of the extension pulley 12, the effect of directional collection of grinding dust from the sanding belt 2 is achieved. The advantage is that the inclined inner wall can guide the dust to slide down along the hopper body, avoiding the dust from drifting into the equipment or working environment; the design of the opening away from the extension pulley 12 can reduce the dust adhering to the pulley surface, prevent the dust from affecting the fit between the sanding belt 2 and the pulley, reduce the risk of the sanding belt 2 running off track or local wear, and improve the cleanliness of the working environment.

[0022] The dust hopper 3 has a through hole at its top that matches the top of the connecting shaft 6. The top of the connecting shaft 6 extends through the through hole, and its outer wall and the inner wall of the through hole are slidably connected. By opening a through hole at the top of the dust hopper 3 that matches the top of the connecting shaft 6, and having the top of the connecting shaft 6 extend through the through hole and slide to the hole wall, the dust hopper 3 moves synchronously with the extension pulley 12. The advantage is that when the extension pulley 12 is adjusted along the connecting shaft 6, the dust hopper 3 can move synchronously, always maintaining dust protection at the junction of the extension pulley 12 and the sand belt 2, avoiding gaps in the dust protection range caused by the movement of the pulley, ensuring the continuity of dust collection, and reducing the adjustment jamming problem caused by dust entering the extension gap of the connecting shaft 6.

[0023] The dust hopper 3 has a petal-shaped elastic retaining ring installed on the side near the extension pulley 12. This petal-shaped elastic retaining ring consists of six arc-shaped elastic steel sheets. The base of each arc-shaped elastic steel sheet is connected to one side of the dust hopper 3 via a hinge, and the ends of the arc-shaped elastic steel sheets slightly curve outwards towards the sand belt 2. A miniature spring is connected to the inner side of each arc-shaped elastic steel sheet. The end of the miniature spring away from the arc-shaped elastic steel sheet is fixed to one side of the extension pulley 12. The dust hopper 3, near the extension pulley 12, is equipped with a six-piece arc-shaped elastic steel sheet structure, with the miniature spring connected to the inner side of the strip. The petal-shaped elastic retaining ring fixed to wheel 12, with the steel plate end slightly tilted outward towards the sanding belt 2, achieves the effect of adaptive anti-deviation and protection of the sanding belt 2 side. The elastic force of the micro spring can push the arc-shaped elastic steel plate to fit the side of the sanding belt 2, and can offset the deviation force in real time regardless of the width of the sanding belt 2, preventing the sanding belt 2 from shifting during operation. The slightly tilted design at the end of the steel plate facilitates the smooth introduction of the sanding belt 2 when it is put on, reducing the installation resistance of the sanding belt 2. At the same time, the elastic retaining ring can prevent some dust from directly contacting the connection between the extension pulley 12 and the sanding belt 2, further improving the dustproof effect.

[0024] The working principle of this embodiment is as follows: When it is necessary to replace the sanding belt 2 or adjust it to fit different widths of sanding belt 2, first operate the locking pin 5 to disengage it from the corresponding locking hole 7 on the connecting shaft 6. At this time, the extension pulley 12 can be pulled to slide along the connecting shaft 6. The spring 8 on the outside of the connecting shaft 6 will generate elastic deformation as the extension pulley 12 moves to provide cushioning. After the extension pulley 12 slides to the position that matches the width of the target sanding belt 2, insert the locking pin 5 into the corresponding locking hole 7 to lock the position of the extension pulley 12. When the sanding belt 2 is fitted, the inner hole of the sanding belt 2 presses against the fixed inner shaft and the movable inner shaft in the connecting shaft 6. The arc-shaped elastic steel sheet of the petal-shaped elastic retaining ring at the end of the moving outer shaft retracts inward and generates a reverse clamping force through the inner micro spring, automatically fitting the side of the sanding belt 2 to prevent the sanding belt 2 from running off-center. When the sanding machine is working, the fixed pulley 11 and the extended pulley 12 drive the sanding belt 2 to rotate. The conical dust hopper 3 on the side wall of the extended pulley 12 collects the dust generated by grinding, preventing the dust from affecting the sliding of the connecting shaft 6. The whole machine achieves rapid replacement and stable operation of sanding belts 2 of different widths through the synergistic effect of pulley adjustment, position locking, elastic clamping and dust protection.

[0025] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A quick-change sanding belt mechanism and a sanding disc machine, comprising a sanding disc machine body (1) and a sanding belt (2) sleeved on the pulley assembly of the sanding disc machine body (1), characterized in that: The pulley assembly of the main body (1) of the sanding machine includes a fixed pulley (11) and an adjustable extension pulley (12). The extension pulley (12) is slidably connected to the fixed pulley (11) through a connecting shaft (6). The connecting shaft (6) has multiple sets of locking holes (7) distributed axially. The side wall of the extension pulley (12) is provided with a locking pin (5) corresponding to the position of the locking hole (7). The locking pin (5) is adapted to the locking hole (7) to lock the position of the extension pulley (12). A spring (8) is sleeved on the outside of the connecting shaft (6).

2. The quick-change belt sander and sanding disc machine as described in claim 1, characterized in that: A limiting block (4) is installed on the side wall of the connecting shaft (6), and the limiting block (4) is detachably connected to the side wall of the connecting shaft (6) by bolts.

3. The quick-change belt sander and sanding disc machine as described in claim 1, characterized in that: The end of the locking pin (5) is provided with annular anti-slip texture. The end of the locking pin (5) away from the locking hole (7) is slidably fitted with a sliding block (10). The bottom outer wall of the locking pin (5) is connected to a pressing block (9). The spring (8) is abutted between the top side of the pressing block (9) and the bottom side of the sliding block (10). The inner side wall of the sliding block (10) is wrapped with a rubber anti-slip sleeve.

4. The quick-change belt sander and sanding disc machine as described in claim 1, characterized in that: The side wall of the extension pulley (12) is equipped with a conical dust hopper (3), the inner wall of the dust hopper (3) is inclined, and the first opening of the dust hopper (3) is located away from the extension pulley (12).

5. The quick-change belt sander and sanding disc machine as described in claim 4, characterized in that: The top of the dust hopper (3) is provided with a through hole matching the top of the connecting shaft (6), the top of the connecting shaft (6) passes through the through hole, and the outer wall of the top and the inner wall of the through hole are slidably connected.

6. The quick-change belt sander and sanding disc machine as described in claim 4, characterized in that: The dust hopper (3) has a petal-shaped elastic retaining ring installed on the side near the extension pulley (12); the petal-shaped elastic retaining ring is composed of six arc-shaped elastic steel sheets, the root of the arc-shaped elastic steel sheets is connected to one side of the dust hopper (3) through a hinge, and the end of the arc-shaped elastic steel sheets is slightly raised to the outside of the sand belt (2); a micro spring is connected to the inner side of the arc-shaped elastic steel sheet, and the end of the micro spring away from the arc-shaped elastic steel sheet is fixed to one side of the extension pulley (12).

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