Drill chuck structure

Abstract

The utility model provides a drill chuck structure which comprises a drill body, clamping jaws and a nut, the end portion of the drill body is provided with a positioning hole in the axial direction of the drill body, the side wall of the drill body is provided with three installing holes which are obliquely arranged and communicated with the positioning hole, and each installing hole is internally provided with one clamping jaw in a penetrating mode. The nut is rotationally connected to the drill body and is in threaded connection with the three clamping jaws, an inner sleeve is rotationally connected to the outer wall of the drill body, the inner sleeve is connected with the nut through a connecting structure, a connecting hole is formed in the outer wall of the end, close to the positioning hole, of the drill body, the connecting hole is communicated with the positioning hole, a sponge block is arranged in the connecting hole, and the sponge block is connected with the inner sleeve through a connecting structure. One end of the sponge block abuts against the outer wall of the clamping jaw, and the other end of the sponge block abuts against the inner sleeve, so that the clamping jaw is not prone to being clamped.

Description

Technical Field

[0001] The utility model relates to a drill chuck structure. Background Art

[0002] At present, a Chinese patent with authorization announcement number CN213827182U discloses a drill chuck, whose front end steel cap is provided with an elastic clamping ring and a clamping ring locking groove, the drill chuck is provided with a structure that cooperates with the clamping ring locking groove to lock the clamping ring, the front end steel cap is connected to the drill body through the clamping ring, the rotating sleeve is rotatably connected and radially positioned with the front part of the drill body through the front end steel cap, and is limited at the front part in the axial direction.

[0003] The drill chuck has simple assembly steps, and the front steel cap can be conveniently equipped with a clamping ring to facilitate connection and installation with the drill body, thereby preventing the clamping ring from appearing outside the front end of the drill chuck.

[0004] The jaws are inserted into the jaw holes, and the nut is rotated to move the jaws along the jaw holes. When the jaws are clamping the drill bit, the jaws extend from the rotating sleeve. When the drill bit is working, there will be debris covering the surface of the jaws. After the drill bit is removed, when the jaws are moved back, there will be debris placed between the nut and the jaws, causing the jaws to be stuck. Utility Model Content

[0005] In view of this, the utility model aims to provide a drill chuck structure to achieve the purpose of preventing the clamping jaws from being stuck.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a drill chuck structure, including a drill body, a clamping jaw, and a nut. A positioning hole is opened at the end of the drill body along its own axial direction, and three obliquely arranged mounting holes connected to the positioning hole are opened on the side wall of the drill body. A clamping jaw is inserted in each mounting hole, and the nut is rotatably connected to the drill body and is threadedly connected to the three clamping jaws. An inner sleeve is rotatably connected to the outer wall of the drill body, and the inner sleeve is connected to the nut through a connecting structure. A connecting hole is opened on the outer wall of the drill body near one end of the positioning hole, and the connecting hole is connected to the positioning hole. A sponge block is arranged in the connecting hole, and one end of the sponge block abuts against the outer wall of the clamping jaw, and the other end abuts against the inner sleeve.

[0007] To implement the above technical solution, the clamp is inserted from the mounting hole into the positioning hole, the nut is rotatably connected to the drill body and threadedly connected to the clamp, and during the rotation of the nut, the clamp moves along the length direction of the positioning hole, and the three clamps move simultaneously, so that the clamp clamps the drill bit. During the operation of the drill bit, the generated debris adheres to the surface of the clamp, and as the clamp retracts, the sponge block wipes off the debris on the clamp, so that the debris is not easily stuck on the thread, thereby achieving the purpose of preventing the clamp from being easily stuck.

[0008] As a preferred solution of the utility model, a pressure plate is arranged in the connecting hole, the pressure plate is located between the inner sleeve and the sponge block, a cleaning liquid is arranged on the sponge block, an elastic structure is arranged on the inner sleeve, and the elastic structure is used to abut against the side of the pressure plate facing away from the sponge block.

[0009] To implement the above technical solution, during the rotation of the inner sleeve, the screw sleeve is driven to rotate synchronously through the connecting structure, and the clamping jaws move along their own length direction. At the same time, the elastic structure contacts the pressure plate to apply pressure to the pressure plate, so that the pressure plate applies pressure to the sponge block, so that the cleaning liquid in the sponge block is squeezed out, thereby improving the cleaning effect of the clamping jaws and further reducing the amount of debris residue on the clamping jaws.

[0010] As a preferred solution of the utility model, the elastic structure includes a placement recess, an elastic member, and a pressure rod. The placement recess is opened on the inner wall of the inner sleeve, and the elastic member is placed in the placement recess. One end of the pressure rod is in contact with the elastic member, and the other end of the pressure rod extends from the placement recess and is used to contact with the pressure plate. A guiding slope is opened on the side wall of the pressure rod for contacting with the inner wall of the connecting hole, and the pressure rod is connected to the placement recess by an anti-detachment component.

[0011] To implement the above technical solution, during the rotation of the inner sleeve, when the pressure rod corresponds to the connecting hole, the elastic force of the elastic member allows the pressure rod to penetrate into the connecting hole and come into contact with the pressure plate, so that the pressure plate applies pressure to the sponge block to squeeze out the cleaning liquid. As the inner sleeve continues to rotate, the guiding bevel on the pressure rod comes into contact with the inner wall of the connecting hole, and the pressure rod is moved back to the placement recessed hole through the guiding action of the guiding bevel, so as to achieve the effect of intermittently squeezing the sponge block, saving the use of cleaning liquid. The setting of the anti-detachment component makes it difficult for the pressure rod to detach from the placement recessed hole.

[0012] As a preferred solution of the utility model, the anti-slip assembly includes an anti-slip sheet and an adjustment ring. The anti-slip sheet is fixed on the side wall of the pressure rod and is located in the placement recessed hole. The adjustment ring is threadedly connected to the end of the placement recessed hole and is used to interfere with the surface of the anti-slip sheet.

[0013] To implement the above technical solution, the pressure rod is placed in the placement recessed hole, the adjustment ring is threadedly connected to the end of the placement recessed hole and contacts the anti-slip sheet, and by rotating the adjustment ring, pressure is applied to the anti-slip sheet to move the pressure rod toward or away from the elastic member so that the guiding slope on the pressure rod corresponds to the end of the connecting hole.

[0014] As a preferred solution of the utility model, the connecting structure includes a first protrusion and a second protrusion, a plurality of the first protrusions are fixed to the end of the nut and arranged along the axis of the nut, a plurality of the second protrusions are fixed to the inner wall of the inner sleeve, the second protrusion is located between the two first protrusions, and the side wall of the second protrusion is used to interfere with the side wall of the first protrusion.

[0015] To implement the above technical solution, during the rotation of the inner sleeve, the first protrusion and the second protrusion abut against each other, so that the nut rotates synchronously with the inner sleeve.

[0016] As a preferred solution of the utility model, a limiting ring is sleeved on the outer wall of the nut.

[0017] To implement the above technical solution, the setting of the limit ring enables the nut to maintain a connection state with the clamping jaws, making the nut less likely to deform or break.

[0018] As a preferred solution of the utility model, a sheet metal knurled outer sleeve is fixedly connected to the outer wall of the inner sleeve, and a decorative sleeve is fixedly connected to the end of the inner sleeve.

[0019] By implementing the above technical solution, it is easier to rotate the inner sleeve while holding the knurled outer sleeve, and the provision of the decorative sleeve enhances the protective effect on the end of the clamping jaws. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0021] Figure 2 A schematic diagram of the explosion structure of the utility model;

[0022] Figure 3 A schematic diagram showing the connection structure;

[0023] Figure 4 A schematic diagram showing the position of the sponge block.

[0024] Figure numerals: 1. drill body; 11. clamping jaw; 12. nut; 21. mounting hole; 22. positioning hole; 31. bearing; 32. washer; 33. limiting ring; 4. inner sleeve; 5. connecting structure; 51. first protrusion; 52. second protrusion; 61. connecting hole; 62. sponge block; 63. pressure plate; 7. elastic structure; 71. placement recessed hole; 72. elastic member; 73. pressure rod; 74. guiding slope; 8. anti-slip assembly; 81. anti-slip sheet; 82. adjusting ring; 91. iron knurled outer sleeve; 92. decorative sleeve. DETAILED DESCRIPTION

[0025] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0026] A drill chuck structure comprises a drill body 1, a clamping jaw 11 and a nut 12. A positioning hole 22 is provided at the end of the drill body 1 along its axial direction, and the cross section of the positioning hole 22 is circular.

[0027] The side wall of the drill body 1 is provided with obliquely arranged mounting holes 21, and there are three mounting holes 21 in total and evenly distributed along the axis of the drill body 1. A clamping jaw 11 is inserted into each mounting hole 21, and a part of the clamping jaw 11 is located in the mounting hole 21 and a part of the clamping jaw 11 is located outside the mounting hole 21.

[0028] The nut 12 is rotatably connected to the drill body 1 and is threadedly connected to the three clamping jaws 11. The nut 12 is sleeved on the outside of the drill body 1. The end of the nut 12 is connected to the drill body 1 through a bearing 31 and a washer 32 to make the nut 12 rotate more smoothly.

[0029] An inner sleeve 4 is rotatably connected to the outer wall of the drill body 1, and the inner sleeve 4 is connected to the nut 12 through a connecting structure 5. The connecting structure 5 includes a first protrusion 51 and a second protrusion 52. Four first protrusions 51 are fixed to the ends of the nut 12 and arranged along the axis of the nut 12, and two second protrusions 52 are fixed to the inner wall of the inner sleeve 4. One second protrusion 52 is located between the two first protrusions 51. The side wall of the second protrusion 52 is used to abut against the side wall of the first protrusion 51.

[0030] An annular limiting ring 33 is sleeved on the outer wall of the nut 12 , and the limiting ring 33 is located inside the inner sleeve 4 .

[0031] A connecting hole 61 is provided on the outer wall of the drill body 1 near the locating hole 22, and the axis of the connecting hole 61 is perpendicular to the axis of the locating hole 22. The connecting hole 61 is connected to the locating hole 22. A sponge block 62 is provided in the connecting hole 61, and the sponge block 62 is located inside the inner sleeve 4. There are three connecting holes 61, and each connecting hole 61 corresponds to a clamping jaw 11.

[0032] A disc-shaped pressing plate 63 is placed in the connecting hole 61, and the pressing plate 63 is located between the inner sleeve 4 and the sponge block 62. A cleaning liquid is provided on the sponge block 62, and the cleaning liquid is a mixture of detergent and water. An elastic structure 7 is provided on the inner sleeve 4, and the elastic structure 7 is used to abut against the side of the pressing plate 63 facing away from the sponge block 62.

[0033] The elastic structure 7 includes a placement recessed hole 71, an elastic member 72, and a pressure rod 73. The placement recessed hole 71 is opened on the inner wall of the inner sleeve 4, and the elastic member 72 is placed in the placement recessed hole 71. The elastic member 72 is a spring, and the cross section of the placement recessed hole 71 is square. One end of the pressure rod 73 is in contact with the elastic member 72, and the other end of the pressure rod 73 extends from the placement recessed hole 71 and is used to contact with the pressure plate 63. A guiding inclined surface 74 is opened on the side wall of the pressure rod 73 for contacting with the inner wall of the connecting hole 61.

[0034] During the rotation of the inner sleeve 4, when the pressure rod 73 corresponds to the connection hole 61, the elastic force of the elastic member 72 allows the pressure rod 73 to penetrate into the connection hole 61 and contact the pressure plate 63, so that the pressure plate 63 applies pressure to the sponge block 62, and the end of the sponge block 62 away from the pressure plate 63 is pressed against the clamping jaw 11 to squeeze out the cleaning liquid and apply it on the surface of the clamping jaw 11. As the inner sleeve 4 continues to rotate, the guiding slope 74 on the pressure rod 73 contacts the inner wall of the connection hole 61, and the pressure rod 73 is moved back to the placement concave hole 71 by the guiding effect of the guiding slope 74, so as to achieve the effect of intermittently squeezing the sponge block 62 and save the amount of cleaning liquid used.

[0035] The pressure rod 73 is connected to the placement recessed hole 71 through an anti-slip assembly 8. The anti-slip assembly 8 includes an anti-slip sheet 81 and an adjustment ring 82. The anti-slip sheet 81 is fixed to the side wall of the pressure rod 73 and is located in the placement recessed hole 71. The adjustment ring 82 is threadedly connected to the end of the placement recessed hole 71 and is used to abut against the surface of the anti-slip sheet 81. A straight groove is provided at one end of the adjustment ring 82 facing away from the anti-slip sheet 81, and tweezers are inserted into the straight groove to facilitate the rotation of the adjustment ring 82.

[0036] An iron knurled outer sleeve 91 is fixedly connected to the outer wall of the inner sleeve 4 , and a decorative sleeve 92 is fixedly connected to the end of the inner sleeve 4 .

[0037] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementations. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A drill chuck structure, comprising a drill body (1), a clamping jaw (11), and a nut (12), wherein a positioning hole (22) is provided at the end of the drill body (1) along its axial direction, and three obliquely arranged mounting holes (21) communicating with the positioning hole (22) are provided on the side wall of the drill body (1), a clamping jaw (11) is inserted into each mounting hole (21), and the nut (12) is rotatably connected to the drill body (1) and is threadedly connected to the three clamping jaws (11), and an inner sleeve (4) is rotatably connected to the outer wall of the drill body (1), and the inner sleeve (4) is connected to the nut (12) through a connecting structure (5), wherein: A connecting hole (61) is provided on the outer wall of the drill body (1) near one end of the positioning hole (22), and the connecting hole (61) is connected to the positioning hole (22). A sponge block (62) is arranged in the connecting hole (61), and one end of the sponge block (62) contacts the outer wall of the clamping jaw (11), and the other end contacts the inner sleeve (4).

2. A drill chuck structure according to claim 1, characterized in that: A pressure plate (63) is arranged in the connecting hole (61), and the pressure plate (63) is located between the inner sleeve (4) and the sponge block (62). A cleaning liquid is arranged on the sponge block (62). An elastic structure (7) is arranged on the inner sleeve (4), and the elastic structure (7) is used to abut against the side of the pressure plate (63) facing away from the sponge block (62).

3. A drill chuck structure according to claim 2, characterized in that: The elastic structure (7) comprises a placement recess (71), an elastic member (72), and a pressure rod (73); the placement recess (71) is provided on the inner wall of the inner sleeve (4); the elastic member (72) is placed in the placement recess (71); one end of the pressure rod (73) contacts the elastic member (72); the other end of the pressure rod (73) extends from the placement recess (71) and contacts the pressure plate (63); a guiding inclined surface (74) for contacting the inner wall of the connecting hole (61) is provided on the side wall of the pressure rod (73); the pressure rod (73) is connected to the placement recess (71) via an anti-slip assembly (8).

4. A drill chuck structure according to claim 3, characterized in that: The anti-slip assembly (8) comprises an anti-slip sheet (81) and an adjustment ring (82); the anti-slip sheet (81) is fixed on the side wall of the pressure rod (73) and is located in the placement recessed hole (71); the adjustment ring (82) is threadedly connected to the end of the placement recessed hole (71) and is used to abut against the surface of the anti-slip sheet (81).

5. A drill chuck structure according to any one of claims 1 to 4, characterized in that: The connection structure (5) comprises a first protrusion (51) and a second protrusion (52), wherein a plurality of the first protrusions (51) are fixed to the end of the nut (12) and arranged along the axis of the nut (12), and a plurality of the second protrusions (52) are fixed to the inner wall of the inner sleeve (4), wherein the second protrusion (52) is located between two of the first protrusions (51), and the side wall of the second protrusion (52) is used to abut against the side wall of the first protrusion (51).

6. A drill chuck structure according to claim 5, characterized in that: A limiting ring (33) is sleeved on the outer wall of the nut (12).

7. A drill chuck structure according to claim 6, characterized in that: An iron knurled outer sleeve (91) is fixedly connected to the outer wall of the inner sleeve (4), and a decorative sleeve (92) is fixedly connected to the end of the inner sleeve (4).

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