Anti-loose quick-release connection structure of electric power tool

Abstract

The utility model discloses a kind of quick-release connection structure of anti-loose electric tool, including fuselage and working head, the output end of fuselage is fixedly connected with sleeve portion, the inside wall of sleeve portion is opened with annular clamping groove along circumference, the inside of annular clamping groove both sides are movably equipped with C-shaped lock ring, two the ends of the side of C-shaped lock ring mutually away are connected with the inner wall of annular clamping groove with first spring, one end of the working head is fixedly connected with the plug-in portion of sleeve portion adaptation plug-in, the outer wall of plug-in portion is equipped with the C-shaped limit slot of C-shaped lock ring adaptation. The utility model is inserted into working head, and C-shaped lock ring is shrunk by guiding conical surface extrusion, after in place, C-shaped lock ring is inserted into C-shaped limit slot, realize first quick locking and anti-rotation. Then, drive rod of one side of two C-shaped lock rings is inserted in the inside of trapezoidal groove on C-shaped lock ring, so as to make C-shaped lock ring more closely into the bottom of C-shaped limit slot, realize locking.

Description

Technical Field

[0001] This utility model relates to the field of power tool accessories technology, specifically to a quick-release connection structure for power tools that prevents loosening. Background Technology

[0002] Power tools are mechanized tools that use an additional power source and mechanism to drive the working head through a transmission structure. Power tools have the same power source, and only the tool head needs to be replaced to change the function. These tools play an indispensable role in many fields such as modern industry, construction, maintenance, and home decoration, and greatly improve work efficiency and work quality.

[0003] The tool heads of existing power tools are prone to gradually loosening under high-frequency vibration and impact loads, affecting the safety and continuity of operation; therefore, they do not meet the current requirements. To address this, we propose a quick-release connection structure for power tools that prevents loosening. Utility Model Content

[0004] The purpose of this utility model is to provide a quick-release connection structure for power tools that prevents loosening, in order to solve the problem mentioned in the background art that the tool head of existing power tools is prone to gradually loosening under high-frequency vibration and impact loads, affecting the safety and continuity of operation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a quick-release connection structure for an anti-loosening power tool, comprising a body and a working head. The output end of the body is fixedly connected to a sleeve portion. An annular groove is provided circumferentially on the inner side wall of the sleeve portion. C-shaped locking rings are movably provided on both sides inside the annular groove. The two ends of the two C-shaped locking rings on opposite sides are connected to the inner wall of the annular groove by a first spring. One end of the working head is fixedly connected to a plug-in portion that is adapted to be inserted into the sleeve portion. The outer wall of the plug-in portion is provided with a C-shaped limiting groove adapted to the C-shaped locking rings.

[0006] Preferably, a drive cavity is provided on both the front and rear sides of one side of the annular groove and inside the sleeve portion, and a drive rod extending through and to the outside of the drive cavity is slidably connected inside both drive cavities.

[0007] Preferably, a limiting plate that is slidably connected to the driving cavity is fixed to the outer surface of one end of the driving rod located inside the driving cavity, and a second spring is fixedly connected between one side of the limiting plate and one side of the inner wall of the driving cavity, and the second spring is wound around the outer surface of the driving rod.

[0008] Preferably, the two C-shaped locking rings have trapezoidal grooves on the side near the drive cavity. The end of the drive rod that passes through the outside of the drive cavity extends into the interior of the annular groove and is inserted into the trapezoidal groove, and slides in contact with the inclined surface of the trapezoidal groove.

[0009] Preferably, in the natural state of the second spring, the end of the drive rod contacts the inclined surface of the trapezoidal groove near the upper end.

[0010] Preferably, the end of the insertion part is provided with a guide cone surface.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model involves inserting the plug-in part on one side of the working head into the inner cavity of the sleeve. At this time, the guide cone surface at the end of the plug-in part first contacts the C-shaped locking ring and presses the C-shaped locking ring radially to squeeze the first spring, causing it to retract into the interior of the annular groove. When the plug-in part continues to be inserted until the C-shaped limiting groove is aligned with the C-shaped locking ring, the C-shaped locking ring quickly springs into the C-shaped limiting groove under the elastic force of the first spring, thereby completing the initial locking of the working head. In addition, the drive rods on one side of the two C-shaped locking rings are inserted into the trapezoidal grooves on the C-shaped locking rings, thereby causing the C-shaped locking rings to be more tightly locked into the bottom of the C-shaped limiting grooves, thus achieving locking. 2. This utility model pushes the drive rods on both sides, causing the ends of the drive rods to move along the inclined surface of the trapezoidal groove towards the bottom of the trapezoidal groove, thereby driving the first spring on the C-shaped locking ring to compress and causing the C-shaped locking ring to disengage from the C-shaped limiting groove. Then, the working head can be easily pulled out of the sleeve to complete the disassembly. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a side sectional view of the sleeve portion and the insertion portion of this utility model; Figure 3 This is a top sectional view of the entire utility model; Figure 4 This utility model Figure 3 A schematic diagram of the structure at point A in the middle.

[0013] In the diagram: 1. Body; 2. Sleeve section; 201. Annular groove; 202. Drive cavity; 3. Working head; 4. Insertion section; 401. Guide cone surface; 402. C-shaped limiting groove; 5. C-shaped locking ring; 501. Trapezoidal groove; 6. First spring; 7. Drive rod; 8. Limiting plate; 9. Second spring. Detailed Implementation

[0014] 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.

[0015] Please see Figures 1 to 4The present invention provides an embodiment of a quick-release connection structure for an anti-loosening power tool, comprising a body 1 and a working head 3. The output end of the body 1 is fixedly connected to a sleeve portion 2. The inner side wall of the sleeve portion 2 is provided with an annular groove 201 along the circumference. Both sides of the annular groove 201 are movably provided with C-shaped locking rings 5. The two ends of the two C-shaped locking rings 5 ​​on the opposite side are connected to the inner wall of the annular groove 201 with a first spring 6. One end of the working head 3 is fixedly connected to a plug-in portion 4 that is adapted to be inserted into the sleeve portion 2. The outer wall of the plug-in portion 4 is provided with a C-shaped limiting groove 402 that is adapted to be fitted with the C-shaped locking rings 5.

[0016] The end of the insertion part 4 is provided with a guide cone surface 401. By inserting the insertion part 4 on one side of the working head 3 into the inner cavity of the sleeve part 2, the guide cone surface 401 at the end of the insertion part 4 first contacts the C-shaped locking ring 5 and presses the C-shaped locking ring 5 radially to squeeze the first spring 6, causing it to retract into the interior of the annular groove 201. When the insertion part 4 continues to be inserted until the C-shaped limiting groove 402 is aligned with the C-shaped locking ring 5, the C-shaped locking ring 5 quickly springs into the C-shaped limiting groove 402 under the elastic force of the first spring 6, thereby completing the initial locking of the working head 3. In addition, the drive rods 7 on one side of the two C-shaped locking rings 5 ​​are inserted into the interior of the trapezoidal groove 501 on the C-shaped locking ring 5, thereby causing the C-shaped locking ring 5 to be more tightly locked into the bottom of the C-shaped limiting groove 402, thus achieving locking.

[0017] A drive cavity 202 is provided on both the front and back sides of one side of the annular groove 201 and inside the sleeve part 2. A drive rod 7 extending through and to the outside of the drive cavity 202 is slidably connected inside the two drive cavities 202. A limiting plate 8 is fixedly connected to the drive cavity 202 on the outer surface of the end of the drive rod 7 inside the drive cavity 202. A second spring 9 is fixedly connected between one side of the limiting plate 8 and one side of the inner wall of the drive cavity 202. The second spring 9 is wrapped around the outer surface of the drive rod 7. A trapezoidal groove 501 is provided on the side of the two C-shaped locking rings 5 ​​near the drive cavity 202. The end of the drive rod 7 extending through and to the outside of the drive cavity 202 extends into the interior of the annular groove 201 and is inserted into the interior of the trapezoidal groove 501. It is in sliding contact with the inclined surface of the trapezoidal groove 501. In the natural state, the end of the drive rod 7 is in contact with the inclined surface of the trapezoidal groove 501 near the upper end.

[0018] By pushing the drive rods 7 on both sides, the ends of the drive rods 7 move along the inclined surface of the trapezoidal groove 501 toward the bottom end of the trapezoidal groove 501, thereby driving the C-shaped locking ring 5 to compress the first spring 6 on one side and causing the C-shaped locking ring 5 to disengage from the C-shaped limiting groove 402. Then the working head 3 can be easily pulled out from the sleeve part 2.

[0019] When using the power tool, the insertion part 4 on one side of the working head 3 is aligned with the inner cavity of the sleeve part 2 and inserted. At this time, the guide cone surface 401 at the end of the insertion part 4 first contacts the C-shaped locking ring 5 and presses the C-shaped locking ring 5 radially to compress the first spring 6, causing it to retract into the interior of the annular groove 201. When the insertion part 4 continues to be inserted until the C-shaped limiting groove 402 is aligned with the C-shaped locking ring 5, the C-shaped locking ring 5 quickly springs into the C-shaped limiting groove 402 under the elastic force of the first spring 6, thereby completing the initial locking of the working head 3. In addition, the drive rods 7 on one side of the two C-shaped locking rings 5 ​​are inserted into the interior of the trapezoidal groove 501 on the C-shaped locking ring 5, thereby causing the C-shaped locking ring 5 to be more tightly locked into the bottom of the C-shaped limiting groove 402, thus achieving locking. When disassembly is required, by pushing the drive rods 7 on both sides, the ends of the drive rods 7 move along the inclined surface of the trapezoidal groove 501 toward the bottom end of the trapezoidal groove 501, thereby driving the C-shaped locking ring 5 to compress the first spring 6 on one side, and causing the C-shaped locking ring 5 to disengage from the C-shaped limiting groove 402. Then the working head 3 can be easily pulled out from the sleeve part 2 to complete the disassembly.

[0020] 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 quick-release connection structure for an anti-loosening power tool, comprising a body (1) and a working head (3), characterized in that: The output end of the machine body (1) is fixedly connected to a sleeve part (2). The inner side wall of the sleeve part (2) is provided with an annular groove (201) along the circumferential direction. Both sides of the annular groove (201) are provided with C-shaped locking rings (5). The two ends of the two C-shaped locking rings (5) on the opposite side are connected to the inner wall of the annular groove (201) with a first spring (6). One end of the working head (3) is fixedly connected to a plug-in part (4) that is adapted to be inserted into the sleeve part (2). The outer wall of the plug-in part (4) is provided with a C-shaped limiting groove (402) that is adapted to be fitted into the C-shaped locking ring (5).

2. The quick-release connection structure for an anti-loosening power tool according to claim 1, characterized in that: A drive cavity (202) is provided on the front and back sides of the annular slot (201) and inside the sleeve part (2). A drive rod (7) extending through and to the outside of the drive cavity (202) is slidably connected inside the two drive cavities (202).

3. The quick-release connection structure for an anti-loosening power tool according to claim 2, characterized in that: The outer surface of the drive rod (7) located inside the drive cavity (202) is fixed with a limiting plate (8) that is slidably connected to the drive cavity (202). A second spring (9) is fixedly connected between one side of the limiting plate (8) and one side of the inner wall of the drive cavity (202), and the second spring (9) is wrapped around the outer surface of the drive rod (7).

4. The quick-release connection structure for an anti-loosening power tool according to claim 3, characterized in that: Two C-shaped locking rings (5) have trapezoidal grooves (501) on one side near the drive cavity (202). The drive rod (7) extends through one end to the outside of the drive cavity (202) and into the interior of the annular groove (201), and is inserted into the trapezoidal groove (501) and slides in contact with the inclined surface of the trapezoidal groove (501).

5. The quick-release connection structure for an anti-loosening power tool according to claim 4, characterized in that: In the natural state of the second spring (9), the end of the drive rod (7) contacts the inclined surface of the trapezoidal groove (501) near the upper end.

6. The quick-release connection structure for an anti-loosening power tool according to claim 1, characterized in that: The end of the plug (4) is provided with a guide cone surface (401).

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