A dustproof cover for a three-jaw chuck wrench hole

Abstract

The utility model discloses a kind of three-jaw chuck wrench hole dustproof covers, including the dustproof cover base of three-jaw chuck side wrench hole outside, dustproof cover is mounted on base;Wrench hole has receiving groove outside, base is mounted in groove, operating hole is equipped in base middle part, there is fixed rod on top outside, dustproof cover is rotatably connected with fixed rod by end rotating shaft sleeve, lower end is equipped with locking assembly, base lower end has matching locking groove;Locking assembly contains dustproof cover lower end telescopic groove, telescopic fixed hook is mounted in groove, tension spring is equipped between hook bottom and groove bottom, when hook end is placed in locking groove, dustproof cover is fixed in operating hole outside;The dustproof cover is embedded with positioning ring and positioning ring groove by positioning ring and positioning ring groove embedded cooperation, form sealed defense line and block impurities;Overall size covers operating hole, with locking assembly anti-loosening leakage dirt;Locking assembly uses telescopic fixed hook and tension spring, press to be able to unlock, close automatic fixation, without tool, single-handed operation of single person, improve opening and closing efficiency.

Description

Technical Field

[0001] This utility model specifically relates to a dust cover for the wrench hole of a three-jaw chuck. Background Technology

[0002] Three-jaw chucks, as core clamping accessories for machine tools such as lathes and milling machines, achieve rapid positioning and clamping of workpieces such as circles and regular polygons thanks to their self-centering function. Their clamping accuracy directly determines key indicators such as coaxiality and roundness of the workpiece during machining, and they are widely used in mass production scenarios such as automotive parts, hardware accessories, and mold manufacturing. In the structural design of a three-jaw chuck, the wrench hole is a key operating interface for adjusting the jaws. By inserting a wrench into this hole, the operator adjusts the accuracy of the internal transmission mechanisms such as the worm gear, worm wheel, and gear ring, which helps to achieve synchronous radial movement of the three jaws.

[0003] The working environment of a three-jaw chuck is filled with a large amount of contaminants, posing a serious risk of contamination to the wrench hole and internal transmission mechanism. Metal chips, grinding dust, and coolant used for cooling and lubrication generated during machine tool processing can easily enter the chuck through the open wrench hole. Metal chips may jam the meshing clearance of the worm gear or the transmission tooth groove of the gear ring, causing a sudden increase in wrench adjustment resistance or even jamming of the chuck. Machine shutdown, disassembly, and cleaning are required to restore its use, seriously affecting production efficiency.

[0004] Therefore, it is necessary to invent a dust cover for the wrench hole of a three-jaw chuck to solve the above problems. Utility Model Content

[0005] (a) Purpose of the utility model To address the technical problems existing in the background art, this utility model proposes a dust cover for the wrench hole of a three-jaw chuck.

[0006] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a dust cover for a three-jaw chuck wrench hole, comprising a dust cover base disposed on the outside of the wrench hole on the side of the three-jaw chuck, wherein a dust cover is installed on the dust cover base; The wrench hole has a storage groove on its outside, and the dust cover base is installed in the storage groove. The dust cover base has an operating hole in the middle, and a fixing rod is provided on the top outer side of the dust cover base. The dust cover is rotatably connected to the fixing rod. The end of the dust cover has a rotating bushing that matches the fixing rod. The lower end of the dust cover has a locking component, and the lower end of the dust cover base has a locking groove that matches the locking component. The locking assembly includes a telescopic groove located at the lower end of the dust cover, a telescopic fixing hook installed in the telescopic groove, a tension spring between the bottom of the telescopic fixing hook and the bottom of the telescopic groove, and the end of the telescopic fixing hook placed in the locking groove, that is, the dust cover is fixed outside the operating hole.

[0007] Preferably, the storage groove has limiting rings on both the inner and outer sides, and the dust cover base has matching adapter rings on the inner and outer edges of the bottom. The dust cover base moves within the storage groove, and the overall size of the operating hole is larger than the overall size of the wrench hole.

[0008] Preferably, the dust cover base has a positioning ring groove in the middle outside the operating hole, and the inner edge of the dust cover extends a positioning ring that matches the positioning ring groove. The overall size of the dust cover covers the overall size of the operating hole.

[0009] Preferably, a stop bar is provided at the opening of the telescopic groove, a limiting bar matching the stop bar extends from the end edge of the telescopic fixing hook, and the other end of the telescopic fixing hook is hook-shaped and matches the locking groove.

[0010] Preferably, the end dimension of the telescopic fixing hook does not exceed the internal dimension of the locking groove.

[0011] Preferably, the two ends of the fixing rod are fixing bases, the two fixing bases are fixed to one side of the top of the dust cover base, and a rotating rod is provided between the two fixing bases, and the rotating shaft sleeve is sleeved on the outside of the rotating rod.

[0012] Compared with the prior art, the beneficial effects of the above-mentioned technical solution of this utility model are: 1. This utility model uses the embedded cooperation of the positioning ring and the positioning ring groove to make the inner edge of the dust cover fit tightly with the dust cover base, forming the first line of sealing defense, which can block fine dust and iron filings from entering the operating hole; at the same time, the overall size of the dust cover completely covers the operating hole, and with the stable fixation of the locking component, it avoids the leakage of dirt caused by the dust cover loosening, and fundamentally prevents impurities from entering the wrench hole. 2. The locking component of this utility model adopts an elastic structure of telescopic fixing hook and tension spring. When opening the dust cover, only the telescopic fixing hook needs to be pressed to unlock it. When closing, it automatically embeds into the locking groove to complete the fixation with the return force of the tension spring. No additional tools are required, and the operation can be completed by one person with one hand, which greatly improves the opening and closing efficiency of the dust cover in the processing gap. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the opening structure of the dust cover of this utility model; Figure 3 This is a schematic diagram of the disassembled structure of the locking component of this utility model; Figure 4 This is a schematic diagram of the structure of the dust cover base and the dust cover connection part of this utility model; Figure 5 This is a schematic diagram of the disassembled structure of the dust cover base of this utility model. Figure 1 ; Figure 6 This is a schematic diagram of the disassembled structure of the dust cover base of this utility model. Figure 2 .

[0015] Explanation of reference numerals in the attached figures: 1. Three-jaw chuck; 2. Wrench hole; 21. Storage slot; 22. Limit ring; 3. Dust cover base; 31. Operating hole; 32. Fixing rod; 321. Fixing base; 322. Rotating rod; 33. Locking slot; 34. Adapter ring; 35. Positioning ring slot; 4. Dust cover; 41. Rotating bushing; 42. Positioning ring; 5. Locking assembly; 51. Telescopic slot; 52. Telescopic fixing hook; 53. Tension spring; 54. Stop bar; 55. Limit bar. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0017] This utility model provides, for example Figure 1-6 The dust cover for the wrench hole of a three-jaw chuck shown includes a dust cover base 3 disposed on the outside of the wrench hole 2 on the side of the three-jaw chuck 1, and a dust cover 4 is installed on the dust cover base 3. Specifically, the wrench hole 2 is provided with a storage groove 21 on the outside, and a dust cover base 3 is installed in the storage groove 21. The dust cover base 3 is provided with an operation hole 31 in the middle, and a fixing rod 32 is provided on the outer side of the top of the dust cover base 3. The dust cover 4 is rotatably connected to the fixing rod 32. The end of the dust cover 4 is provided with a rotating bushing 41 that matches the fixing rod 32. The lower end of the dust cover 4 is provided with a locking component 5, and the lower end of the dust cover base 3 is provided with a locking groove 33 that matches the locking component 5. Specifically, the locking component 5 includes a telescopic groove 51 located at the lower end of the dust cover 4. A telescopic fixing hook 52 is installed in the telescopic groove 51. A tension spring 53 is provided between the bottom of the telescopic fixing hook 52 and the bottom of the telescopic groove 51. The end of the telescopic fixing hook 52 is placed in the locking groove 33, that is, the dust cover 4 is fixed outside the operating hole 31.

[0018] Specifically, the storage groove 21 has limiting rings 22 on both the inner and outer sides of the groove opening, and the dust cover base 3 has matching rings 34 on the inner and outer edges of the bottom of the limiting rings 22. The dust cover base 3 moves in the storage groove 21, and the overall size of the operating hole 31 is larger than the overall size of the wrench hole 2.

[0019] Specifically, the dust cover base 3 has a positioning ring groove 35 located in the middle outside the operation hole 31, and the inner edge of the dust cover 4 has a positioning ring 42 that matches the positioning ring groove 35. The overall size of the dust cover 4 covers the overall size of the operation hole 31.

[0020] Specifically, a stop bar 54 is provided at the opening of the telescopic groove 51, and a limiting bar 55 matching the stop bar 54 extends from the end edge of the telescopic fixing hook 52. The other end of the telescopic fixing hook 52 is hook-shaped and matches the locking groove 33.

[0021] Specifically, the end dimension of the telescopic fixing hook does not exceed the internal dimension of the locking groove 33.

[0022] Specifically, the two ends of the fixing rod 32 are fixing bases 321, which are fixed to one side of the top of the dust cover base 3. A rotating rod 322 is provided between the two fixing bases 321, and a rotating bushing 41 is sleeved on the outside of the rotating rod 322.

[0023] In this embodiment, based on a conventional three-jaw chuck 1, a storage groove 21 is machined on the outside of the pre-set wrench hole 2 on its side by milling, with a depth consistent with the thickness of the dust cover base 3; at the same time, at the opening of the storage groove 21, limiting rings 22 on the inner and outer sides are machined by turning, and the limiting rings 22 are used to restrict the axial movement of the dust cover base 3.

[0024] Specifically, the dust cover base 3 is made of plastic or metal. Its main body is a ring structure with an operating hole 31 in the middle. The inner diameter of the operating hole 31 needs to be larger than the inner diameter of the wrench hole 2. A fixing rod 32 is welded or injection molded on the outer side of the top of the base. The fixing rod consists of cylindrical fixing bases 321 at both ends and a rotating rod 322 in the middle. The fixing bases 321 are tightly connected to the dust cover base 3. An arc-shaped locking groove 33 is opened on the inner side of the lower end of the base. An annular positioning groove 35 is machined in the middle of the base outside the operating hole 31. On the inner and outer edges of the bottom of the base, an adapter ring 34 that matches the storage groove limiting ring 22 is machined.

[0025] Specifically, the dust cover 4 is made of the same material as the dust cover base and is a circular cover plate with a diameter larger than the outer diameter of the operating hole 31. A rotating bushing 41 is injection molded or welded at one end of the dust cover 4. An annular positioning ring 42 is integrally formed on the inner edge of the dust cover 4. A rectangular expansion groove 51 is machined on the inner side of the lower end of the dust cover 4, and a transverse baffle 54 is machined at the opening of the expansion groove 51.

[0026] Specifically, it is made of spring steel and is L-shaped overall, with a hook at one end and a rectangular rod at the other end; a limiting strip 55 is integrally formed on the edge of the rod end. A cylindrical tension spring is selected, and its elastic coefficient must meet the following requirements: force must be applied when the telescopic fixing hook is pulled, and it can quickly return to its original position after being released, ensuring that the hook is stably embedded in the locking groove.

[0027] Specifically, one end of the tension spring 53 is fixed to the bottom of the telescopic fixing hook 52, and the other end is fixed to the bottom of the telescopic groove 51. A hook or threaded hole is pre-set at the bottom of the telescopic groove to fix the tension spring. The telescopic fixing hook 52 with the tension spring assembled is inserted into the groove from the inside of the telescopic groove 51, ensuring that the limiting strip 55 and the stop strip 54 are on the same plane. At this time, the tension spring is in its natural state, and the hook of the telescopic fixing hook extends out of the outside of the telescopic groove. Align the rotating bushing 41 of the dust cover 4 with the fixing rod rotating rod 322 of the dust cover base 3, and put the bushing into the rotating rod from one end until the bushing is located in the middle of the rotating rod, ensuring that the dust cover can rotate flexibly around the rotating rod. Align the adapter ring 34 of the dust cover base 3 with the limiting ring 22 of the storage groove 21, and slowly push the base into the storage groove from the outside until the base is completely embedded in the storage groove. At this time, the operating hole 31 is coaxially aligned with the wrench hole 2, and the base can move slightly along the circumference of the storage groove.

[0028] Specifically, rotate the dust cover 4 towards the operating hole 31 until the positioning ring 42 on the inner side of the dust cover is inserted into the positioning ring groove 35 of the dust cover base. During the closing process, the hook of the telescopic fixing hook 52 first contacts the lower end of the dust cover base 3 and retracts into the telescopic groove 51 after being squeezed; when the dust cover is fully closed, the hook of the telescopic fixing hook aligns with the locking groove 33, and under the action of the return force of the tension spring, the hook is inserted into the locking groove, thus fixing the dust cover. At this time, the dust cover stably covers the operating hole, preventing dust and iron filings from entering the wrench hole.

[0029] Specifically, press the end of the telescopic fixing hook 52 with your finger to disengage the hook from the locking groove 33. While holding the button down, rotate the dust cover 4 upwards until it is fully open. At this point, you can insert a wrench through the operating hole 31 into the wrench hole 2 to clamp or release the three-jaw chuck. After the operation is complete, repeat the dust cover closing steps to achieve dust protection again. If the wrench is too large or the operating angle is unsuitable, you can gently push the dust cover base 3 to fine-tune the relative position of the operating hole 31 and the wrench hole 2 until the wrench can be smoothly inserted into the operating hole. After adjustment, the base remains stable under the cooperation of the limiting ring and the adapter ring, and does not shift.

[0030] In this embodiment, the dust cover completely covers the operating hole, the sealing fit between the positioning ring and the positioning ring groove, and the stable fixation of the locking component effectively prevent dust, iron filings, and other impurities from entering the wrench hole, avoiding operational jamming or component wear caused by dirt accumulation in the wrench hole. The dust cover can be opened and closed simply by pressing the telescopic fixing hook, making the operation simple. The dust cover can rotate flexibly around the fixing rod, and when open, it does not obstruct the operating space or affect the use of the wrench. The dust cover base can be finely adjusted to accommodate wrenches of different sizes or operating angles.

[0031] In this embodiment, the engagement of the storage slot limiting ring and the base adapter ring prevents the base from axially dislodging; the double-fixed base design of the fixing rod ensures that the dust cover does not wobble when rotating; the engagement of the tension spring and the telescopic fixing hook ensures stable reset force of the locking component, and the dust cover is firmly fixed and not easily loosened. The dimensions of the storage slot, dust cover base, and operating hole can be adjusted according to the wrench hole size of different models of three-jaw chucks to achieve compatibility with various conventional three-jaw chucks, making it suitable for a wide range of scenarios.

[0032] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A dust cover for a three-jaw chuck wrench hole, characterized in that: Includes a dust cover base (3) located outside the wrench hole (2) on the side of the three-jaw chuck (1), and a dust cover (4) is installed on the dust cover base (3); The wrench hole (2) is provided with a storage groove (21) on the outside. The dust cover base (3) is installed in the storage groove (21). The dust cover base (3) is provided with an operation hole (31) in the middle. The dust cover base (3) is provided with a fixing rod (32) on the top outer side. The dust cover (4) is rotatably connected to the fixing rod (32). The dust cover (4) is provided with a rotating bushing (41) matching the fixing rod (32) at the end. The dust cover (4) is provided with a locking component (5) at the lower end. The dust cover base (3) is provided with a locking groove (33) matching the locking component (5) at the lower end. The locking assembly (5) includes a telescopic groove (51) located at the lower end of the dust cover (4). A telescopic fixing hook (52) is installed in the telescopic groove (51). A tension spring (53) is provided between the bottom of the telescopic fixing hook (52) and the bottom of the telescopic groove (51). The end of the telescopic fixing hook (52) is placed in the locking groove (33), that is, the dust cover (4) is fixed outside the operating hole (31).

2. The dust cover for the wrench hole of a three-jaw chuck according to claim 1, characterized in that: The storage groove (21) has a limiting ring (22) on both the inner and outer sides of the groove opening. The dust cover base (3) has an adapter ring (34) at the bottom inner and outer edges that matches the limiting ring (22). The dust cover base (3) moves within the storage groove (21). The overall size of the operating hole (31) is larger than the overall size of the wrench hole (2).

3. A dust cover for a three-jaw chuck wrench hole according to claim 1, characterized in that: The dust cover base (3) is provided with a positioning ring groove (35) in the middle outside the operation hole (31), and the inner edge of the dust cover (4) extends with a positioning ring (42) that matches the positioning ring groove (35). The overall size of the dust cover (4) covers the overall size of the operation hole (31).

4. A dust cover for a three-jaw chuck wrench hole according to claim 1, characterized in that: The telescopic groove (51) is provided with a stop bar (54) at the opening, and the end edge of the telescopic fixing hook (52) extends with a limiting bar (55) that matches the stop bar (54). The other end of the telescopic fixing hook (52) is hook-shaped and matches the locking groove (33).

5. A dust cover for a three-jaw chuck wrench hole according to claim 4, characterized in that: The end dimension of the telescopic fixing hook does not exceed the internal dimension of the locking groove (33).

6. A dust cover for a three-jaw chuck wrench hole according to claim 1, characterized in that: The fixed rod (32) has fixed bases (321) at both ends. The fixed bases (321) at both ends are fixed to one side of the top of the dust cover base (3). A rotating rod (322) is provided between the fixed bases (321) at both ends. The rotating bushing (41) is sleeved on the outside of the rotating rod (322).

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