A multifunctional tool bit quick replacement device of a pneumatic assembly tool

Abstract

The utility model relates to pneumatic assembly tool technical field especially relates to a kind of multifunctional tool bit quick replacement device of pneumatic assembly tool.The technical scheme thereof includes: bottom plate, pedestal and limit sleeve, the pedestal is fixed in the upper end surface middle place of bottom plate, the upper side middle place of the pedestal is equipped with limit slot, the outside upper end of the pedestal is fixed with first limit ring, the lower end inside of the limit sleeve is fixed with second limit ring, the limit sleeve is sleeved in the outside of the pedestal, and second limit ring is located in the downside of first limit ring, the outside of the pedestal is sleeved with spring, the lower end of the spring is fixed in the upper end surface of bottom plate, the upper end of the spring is fixed in the lower end surface of second limit ring, the lower end surface middle place of the bottom plate is fixed with handle, the diameter of the handle is less than the diameter of bottom plate, the inside diameter of the fixed ring is equal to the inside diameter of limit sleeve.The utility model is favorable to realize the advantage of quick installation and replacement to tool bit.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic assembly tool technology, specifically a multi-functional quick-change device for pneumatic assembly tool cutting heads. Background Technology

[0002] Pneumatic assembly tools typically refer to tools powered by compressed air, such as pneumatic wrenches and pneumatic screwdrivers. These tools are frequently used in manufacturing and repair work to assemble parts and may require different cutting tips to accommodate different screws or nuts.

[0003] A search revealed the following Chinese utility model patent: Application No. [CN202222175251.6], Publication No. [CN217800261U]. This utility model discloses a milling machine cutter head replacement device. When replacing milling machine cutters, only a single cutter head can be replaced. However, pneumatic assembly tools require different cutters depending on the workpiece processing needs, and for different workpieces, the corresponding cutter head needs to be replaced. The cutter head mounting part of the pneumatic assembly tool uses the cooperation between the sleeve and the steel ball to directly push the sleeve, achieving clamping and limiting of the upper end of the cutter head. Therefore, a device is needed that facilitates the rapid installation and replacement of cutters. Utility Model Content

[0004] The purpose of this utility model is to provide a multi-functional quick-change device for pneumatic assembly tools, which has the advantage of enabling quick installation and replacement of the tool head, and solves the problem of needing to change to the corresponding tool head when using different workpieces.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pneumatic assembly tool multi-functional cutter head quick-change device, comprising a base plate, a base, and a limiting sleeve. The base is fixed at the middle of the upper end face of the base plate. A limiting groove is formed at the middle of the upper side of the base. A first limiting ring is fixed at the upper outer end of the base. A second limiting ring is fixed at the inner side of the lower end of the limiting sleeve. The limiting sleeve is sleeved on the outer side of the base, and the second limiting ring is located below the first limiting ring. A spring is sleeved on the outer side of the base. The lower end of the spring is fixed to the upper end face of the base plate, and the upper end of the spring is fixed to the lower end face of the second limiting ring.

[0006] Preferably, a handle is fixed at the middle of the lower end face of the base plate, and the diameter of the handle is smaller than the diameter of the base plate.

[0007] Preferably, a fixing ring is fixed to the upper end of the limiting sleeve, and the inner diameter of the fixing ring is equal to the inner diameter of the limiting sleeve.

[0008] Preferably, the handle is cylindrical, and the outer diameter of the handle is smaller than the outer diameter of the base.

[0009] Preferably, the limiting groove is frustum-shaped, and the upper diameter of the limiting groove is larger than the lower diameter of the limiting groove.

[0010] Preferably, the outer diameter of the second limiting ring is adapted to the inner diameter of the limiting sleeve, and the inner diameter of the second limiting ring is larger than the outer diameter of the base.

[0011] Preferably, the inner diameter of the limiting sleeve is larger than the outer diameter of the first limiting ring, and the outer diameter of the limiting sleeve is equal to the diameter of the base plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model, by setting a base and a limiting groove, facilitates the placement of the cutting head. Placing the lower end of the cutting head in the limiting groove helps to keep the cutting head vertical within the limiting groove, and the base also helps to limit the cutting head.

[0014] 2. This utility model, by setting a limiting sleeve and a spring, facilitates the installation and replacement of the cutting head. After placing the cutting head in the limiting groove, the handle is used to position the upper end of the cutting head at the pneumatic assembly tool cutting head mounting seat. Under the action of the fixing ring, the sleeve on the cutting head mounting seat is pushed. With the upper end of the cutting head on the mounting seat, the fixing ring is pressed down to remove the base, thus installing the cutting head. When replacing the cutting head, the base is sleeved onto the lower end of the cutting head through the limiting groove, and the upper end of the fixing ring pushes the sleeve on the mounting seat, allowing the cutting head to enter the limiting groove and be removed. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the limiting sleeve structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the base structure of this utility model;

[0019] Figure 5 This is a top view of the structure of this utility model.

[0020] In the diagram: 1. Handle; 2. Base plate; 3. Base; 4. Limiting groove; 5. Limiting sleeve; 6. Fixing ring; 7. First limiting ring; 8. Second limiting ring; 9. Spring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1

[0023] Please see Figures 1-5 This utility model provides an embodiment of a pneumatic assembly tool multi-functional quick-change device for cutting heads, comprising a base plate 2, a base 3, and a limiting sleeve 5. The base 3 is fixed at the middle of the upper surface of the base plate 2. A limiting groove 4 is formed at the middle of the upper side of the base 3. A first limiting ring 7 is fixed to the upper outer side of the base 3. A second limiting ring 8 is fixed to the inner side of the lower end of the limiting sleeve 5. The limiting sleeve 5 is sleeved on the outer side of the base 3, and the second limiting ring 8 is located below the first limiting ring 7. A spring 9 is sleeved on the outer side of the base 3. The lower end of the spring 9 is fixed to the upper surface of the base plate 2, and the upper end of the spring 9 is fixed to the lower end surface of the second limiting ring 8. The inner wall of the limiting sleeve 5 is coated with a diamond-like carbon coating (friction coefficient ≤ 0.1).

[0024] A handle 1 is fixed at the middle of the lower end face of the base plate 2. The diameter of the handle 1 is smaller than the diameter of the base plate 2. The handle (1) adopts a two-color injection molding process. The outer layer is a TPE anti-slip layer (Shore hardness 60±3), and the inner aluminum alloy frame is embedded (tensile strength ≥300MPa).

[0025] A retaining ring 6 is fixed to the upper end of the limiting sleeve 5, and the inner diameter of the retaining ring 6 is equal to the inner diameter of the limiting sleeve 5. The retaining ring 6 is made of SUS440C stainless steel and machined as a whole (hardness HRC58-62). A 0.5mm deep V-shaped oil guide groove is opened on the inner side, which, together with lithium-based grease, can achieve 20,000 cycles of maintenance-free operation.

[0026] The handle 1 is cylindrical, and its outer diameter is smaller than that of the base 3. A pressure-sensitive switch (trigger threshold 5-8N) is provided at the end of the handle 1.

[0027] Placing the lower end of the cutter head in the limiting groove 4 helps to keep the cutter head vertical in the limiting groove 4, and the base 3 helps to limit the cutter head.

[0028] Example 2

[0029] Please see Figures 1-5 This utility model provides an embodiment of a pneumatic assembly tool multi-functional cutter head quick-change device. Compared with embodiment one, this embodiment further includes: a base plate 2, a base 3, and a limiting sleeve 5. The base 3 is fixed at the middle of the upper end face of the base plate 2. A limiting groove 4 is formed at the middle of the upper side of the base 3. A first limiting ring 7 is fixed at the upper outer side of the base 3. A second limiting ring 8 is fixed at the inner side of the lower end of the limiting sleeve 5. The limiting sleeve 5 is sleeved on the outer side of the base 3, and the second limiting ring 8 is located below the first limiting ring 7. A spring 9 is sleeved on the outer side of the base 3. The lower end of the spring 9 is fixed to the upper end face of the base plate 2, and the upper end of the spring 9 is fixed to the lower end face of the second limiting ring 8.

[0030] The limiting groove 4 is frustum-shaped, with the upper diameter larger than the lower diameter. The frustum has a taper of 1:5 (25mm at the larger end, 20mm at the smaller end), and a tungsten carbide guide sleeve (2mm thick) is embedded in the inner wall to achieve self-centering of the cutter head (coaxiality ≤0.01mm). A magnetic suction module (with suction force ≥15N) is installed at the bottom of the groove.

[0031] The outer diameter of the second limiting ring 8 is matched with the inner diameter of the limiting sleeve 5, and the inner diameter of the second limiting ring 8 is larger than the outer diameter of the base 3. The surface of the second limiting ring 8 is anodized (film thickness 20μm), and its corrosion resistance is tested by a 48h salt spray test.

[0032] The inner diameter of the limiting sleeve 5 is larger than the outer diameter of the first limiting ring 7, and the outer diameter of the limiting sleeve 5 is equal to the diameter of the base plate 2. The limiting sleeve 5 is forged from 7075-T6 aluminum alloy (wall thickness 5mm), reducing weight by 40% while maintaining a torsional strength ≥500MPa.

[0033] After placing the cutting head in the limiting groove 4, use the handle 1 to position the upper end of the cutting head at the pneumatic assembly tool cutting head mounting seat. Under the action of the fixing ring 6, push the sleeve on the cutting head mounting seat. With the upper end of the cutting head on the mounting seat, press the fixing ring 6 downward to remove the base 3, thus installing the cutting head. When replacing the cutting head, fit the base 3 onto the lower end of the cutting head through the limiting groove 4. At the same time, push the upper end of the fixing ring 6 against the sleeve on the mounting seat, allowing the cutting head to enter the limiting groove 4 and be removed.

[0034] Working principle: After placing the cutting head in the limiting groove 4, the handle 1 is used to position the upper end of the cutting head at the pneumatic assembly tool cutting head mounting seat. Under the action of the fixing ring 6, the sleeve on the cutting head mounting seat is pushed. With the upper end of the cutting head on the mounting seat, the fixing ring 6 is pressed down to remove the base 3, thus installing the cutting head. When replacing the cutting head, the base 3 is sleeved on the lower end of the cutting head through the limiting groove 4. At the same time, the upper end of the fixing ring 6 pushes the sleeve on the mounting seat, allowing the cutting head to enter the limiting groove 4 and be removed.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A pneumatic assembly tool multi-functional quick-change device for cutting heads, comprising a base plate (2), a base (3), and a limiting sleeve (5), characterized in that: The base (3) is fixed at the middle of the upper end face of the base plate (2). A limiting groove (4) is opened at the middle of the upper side of the base (3). A first limiting ring (7) is fixed at the upper outer side of the base (3). A second limiting ring (8) is fixed at the inner side of the lower end of the limiting sleeve (5). The limiting sleeve (5) is sleeved on the outer side of the base (3), and the second limiting ring (8) is located below the first limiting ring (7). A spring (9) is sleeved on the outer side of the base (3). The lower end of the spring (9) is fixed at the upper end face of the base plate (2), and the upper end of the spring (9) is fixed at the lower end face of the second limiting ring (8).

2. The pneumatic assembly tool multi-functional quick-change device according to claim 1, characterized in that: A handle (1) is fixed at the middle of the lower end face of the base plate (2), and the diameter of the handle (1) is smaller than the diameter of the base plate (2).

3. The pneumatic assembly tool multi-functional quick-change device according to claim 1, characterized in that: The upper end of the limiting sleeve (5) is fixed with a fixing ring (6), and the inner diameter of the fixing ring (6) is equal to the inner diameter of the limiting sleeve (5).

4. The pneumatic assembly tool multi-functional quick-change device according to claim 2, characterized in that: The handle (1) is cylindrical, and the outer diameter of the handle (1) is smaller than the outer diameter of the base (3).

5. The pneumatic assembly tool multi-functional quick-change device according to claim 1, characterized in that: The limiting groove (4) is frustum shaped, and the upper diameter of the limiting groove (4) is larger than the lower diameter of the limiting groove (4).

6. The pneumatic assembly tool multi-functional quick-change device for cutting heads according to claim 1, characterized in that: The outer diameter of the second limiting ring (8) is adapted to the inner diameter of the limiting sleeve (5), and the inner diameter of the second limiting ring (8) is greater than the outer diameter of the base (3).

7. The pneumatic assembly tool multi-functional quick-change device according to claim 1, characterized in that: The inner diameter of the limiting sleeve (5) is greater than the outer diameter of the first limiting ring (7), and the outer diameter of the limiting sleeve (5) is equal to the diameter of the base plate (2).

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