A drill bit chuck

Abstract

This invention discloses a drill bit chuck, comprising a chuck body and a power source connection end. At least one set of through holes is provided on the outer circumferential surface of the power source connection end. Each through hole set includes two adjacent and axially symmetrical first and second through holes. An end elastic slot is formed between the two ends of each of the first and second through holes along the outer circumferential surface. This invention increases the flexible connection by providing an elastic slot between the chuck body and the power source connection end, enabling the drill bit chuck to perform micro-movements and thus adapt to coaxiality. Furthermore, by providing several elastic slots, springs, and limiting studs on the chuck body, the clamping end can be opened and clamped, thus eliminating the need for a clamping mechanism to clamp the drill bit, reducing drill bit wear, and making drill bit installation and replacement more convenient.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and in particular to a drill bit chuck. Background Technology

[0002] In recent years, as people's requirements for product precision have continued to increase, high-precision equipment has been widely used in various fields of production and manufacturing. In particular, in the field of machinery manufacturing, high precision, high efficiency, and high automation are the general trend of modern industrial development.

[0003] Currently, precision machining equipment such as grinding machines and grooving machines are often required for finishing and grooving processes of mechanical workpieces. As an important mechanical component, the coaxiality of the drill chuck is particularly important for the machining accuracy of the equipment.

[0004] In existing technologies, the coaxiality of drill bit chucks used in equipment such as grinding machines and grooving machines is mainly adjusted manually. Additionally, a clamping mechanism is used to hold the drill bit shank in place to ensure that the drill bit's rotational runout is within the specified technical parameters. This method has two main drawbacks: First, manual coaxiality adjustment requires a high level of operator skill, and the adjustment effect varies greatly from person to person, making it difficult to guarantee quality. This is not only inefficient but also affects machining accuracy. Second, while using a clamping mechanism to hold the drill bit shank can ensure coaxiality to some extent, friction occurs between the shank and the clamping mechanism during drill bit rotation, causing wear and further affecting the performance of the machinery, as well as increasing maintenance costs and operating expenses. Summary of the Invention

[0005] This invention provides a drill chuck that can adapt to coaxial orientation. The specific technical solution is as follows.

[0006] A drill bit chuck includes a chuck body and a power source connection end. At least one set of through holes is provided on the outer peripheral surface of the power source connection end. The through hole set includes two adjacent and axially symmetrical first through holes and second through holes. An end elastic slot is formed by cutting through the two ends of the first through hole and the second through hole along the outer peripheral surface.

[0007] Furthermore, multiple sets of through holes with different cross sections are provided on the outer peripheral surface of the power source connection end, and the two ends of the first through hole and the second through hole in the through hole set are cut along the outer peripheral surface to form an end elastic slit.

[0008] Furthermore, multiple sets of through holes with the same cross-section are provided on the outer peripheral surface of the power source connection end, and the two ends of the first through hole and the second through hole in the through hole set are cut along the outer peripheral surface to form an end elastic slit, and the end elastic slit is curved and does not intersect each other.

[0009] Furthermore, the chuck body includes a main chuck and a secondary chuck, the main chuck is connected to the power source connection end, and the main chuck and the secondary chuck are assembled to form a clamping end.

[0010] Furthermore, the main chuck and the auxiliary chuck are either integrally connected or connected by a fastening mechanism.

[0011] Furthermore, the auxiliary chuck includes a first end near the power source connection end and a second end near the clamping end. The first end has a first elastic slot and a second elastic slot cut through it along the axial direction on both sides, perpendicular to the main chuck. A spring parallel to the main chuck is provided between the first elastic slot and the second elastic slot. The second end has a third elastic slot cut through it along the axial direction in the middle, perpendicular to the main chuck. The first elastic slot, the second elastic slot, and the third elastic slot are not connected to each other.

[0012] Furthermore, the first elastic slot and the second elastic slot divide the first end into a first left end, a first middle end and a first right end; the first middle end is fixedly connected to the main chuck and is equipped with a spring parallel to the main chuck; the first left end and the first right end are equipped with limiting studs parallel to the main chuck; the two ends of the spring elastically abut against the limiting studs at the left and right ends respectively.

[0013] Furthermore, the third elastic slit divides the second end into a second left end and a second right end; the second left end and the second right end form a funnel-shaped opening at the clamping end.

[0014] Furthermore, starting from the position where the main chuck and the auxiliary chuck are connected by an integral connection or a fastening mechanism, a fourth elastic slot and a fifth elastic slot that are not connected to each other are provided at both ends along the axial direction.

[0015] Furthermore, the auxiliary chuck is equipped with a spring and a limiting stud perpendicular to the main chuck at its first end near the power source connection end, with the two ends of the spring elastically abutting against the main chuck and the limiting stud, respectively.

[0016] This invention increases flexibility by incorporating an elastic slot between the chuck body and the power source connection, allowing the drill bit chuck to perform micro-movements and thus adapt to coaxiality, reducing the uncertainty caused by manual adjustments. Furthermore, the chuck body consists of a main chuck and a secondary chuck, which are assembled to form a clamping end. The chuck body is equipped with several elastic slots, springs, and limiting studs, enabling the clamping end to open and close, thereby facilitating the assembly and clamping of the drill bit. This solution replaces the original method of using a clamping mechanism to hold the drill bit in place, reducing wear on the drill bit during use and making installation and replacement more convenient. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a drill bit chuck provided in the first embodiment of the present invention.

[0018] Figure 2 This is an exploded view of the drill bit chuck structure provided in the first embodiment of the present invention.

[0019] Figure 3 This is a front view of the drill bit chuck provided in the first embodiment of the present invention.

[0020] Figure 4 This is a top view of the drill bit chuck provided in the first embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram of a drill bit chuck provided in the second embodiment of the present invention.

[0022] Figure 6 This is an exploded view of the drill bit chuck structure provided in the second embodiment of the present invention.

[0023] The attached diagram is labeled as follows: 1 is the main body of the chuck, 2 is the power source connection end, 3 is the through hole group, 31 is the first through hole, 32 is the second through hole, 4 is the end elastic slot, 5 is the main chuck, 6 is the auxiliary chuck, 61 is the first end, 61a is the first left end, 61b is the first middle end, 61c is the first right end, 62 is the second end, 62a is the second left end, 62b is the second right end, 7 is the clamping end, 8 is the fastening mechanism, 91 is the first elastic slot, 92 is the second elastic slot, 93 is the third elastic slot, 94 is the fourth elastic slot, 95 is the fifth elastic slot, 10 is the spring, 11 is the limiting stud, and 12 is the drill bit. Detailed Implementation

[0024] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. For ease of explanation, the terms "front," "rear," "positive," "negative," "left," "right," "top," "bottom," "upper," "lower," "inner," "outer," and "inner" in the present invention indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention or limitations on the actual orientation of the product or device during production, use, sales, etc. In addition, the terms "main," "secondary," "first," "second," "third," "fourth," and "fifth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Furthermore, in the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," and "composition" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] First Embodiment

[0026] like Figure 1 , 2 As shown, this invention provides a drill bit chuck, including a chuck body 1 and a power source connection end 2. At least one set of through holes 3 is provided on the outer peripheral surface of the power source connection end 2. The through hole set 3 includes two adjacent and axially symmetrical first through holes 31 and second through holes 32 (the axial symmetry in this invention can be vertical axial symmetry, horizontal axial symmetry, or axial symmetry in any other direction). An end elastic slot 4 is formed between the two ends of the first through hole 31 along the outer peripheral surface, and an end elastic slot 4 is also formed between the two ends of the second through hole 32 along the outer peripheral surface. In this invention, the end elastic slot 4 can be a through slot formed by completely cutting through the two ends of the through hole along the outer peripheral surface, or it can be an elastic slot formed by dividing the two ends of the through hole along the outer peripheral surface (with a connection between the through hole and the end elastic slot 4). It should be noted that when the diameters of the first through hole 31 and the second through hole 32 are the same as the width of the end elastic slot 4, this invention will present two slots.

[0027] The drill bit chuck with the above structure has an end elastic slot 4 between the chuck body 1 and the power source connection end 2, which increases the flexible connection and allows the drill bit chuck to make micro-movements during use. This enables it to adapt to coaxiality and reduces the uncertainty caused by manual adjustment.

[0028] In some embodiments, multiple sets of through holes 3 are provided on the outer peripheral surface of the power source connection end 2. Each set of through holes 3 includes two adjacent and axially symmetrical first through holes 31 and second through holes 32. An end elastic slit 4 is formed between the two ends of the first through hole 31 along the outer peripheral surface, and an end elastic slit 4 is also formed between the two ends of the second through hole 32 along the outer peripheral surface. In this embodiment, the number of through hole sets 3 is set to two sets, which are vertically distributed. However, the number of through hole sets 3 can be adjusted according to actual application needs. For example, it can also be set to three sets, four sets, or other numbers. The distribution of multiple sets of through holes 3 can also be set to a uniform distribution (such as a vertical distribution, a 60-degree uniform distribution, etc.) or a non-uniform distribution. When multiple sets of through holes 3 are set to a uniform distribution, the micro-movement of the drill bit chuck will be more uniform, and the effect will be better.

[0029] It should be noted that the multiple sets of through holes 3 can be set on different cross sections of the power source connection end 2, or on the same cross section of the power source connection end 2. When the multiple sets of through holes 3 are set on the same cross section of the power source connection end 2, the end elastic seam 4 is curved and does not intersect each other. In this embodiment, it is set to an arc shape, but it can also be set to other curved shapes, as long as the end elastic seams 4 do not intersect each other.

[0030] The drill bit chuck with the above structure has multiple sets of through holes 3 on the outer circumferential surface of the power source connection end 2, and multiple end elastic slots 4 are formed by cutting through the outer circumferential surface of the power source connection end 2. This allows the drill bit chuck to move more evenly in all directions during use, thus making its self-adaptive coaxial effect better.

[0031] In some embodiments, the first through hole 31 and the second through hole 32 in the through hole group 3 are spaced 0.3mm-0.4mm apart. Within this spacing range, the adaptive coaxiality of the drill bit chuck can be improved.

[0032] In some embodiments, the width of the end elastic slot 4 is 0.3mm-1mm. If the width of the end elastic slot 4 is less than 0.3mm, it cannot be manufactured by machining; if the width of the end elastic slot 4 is greater than 1mm, the chuck body 1 and the power source connection end 2 are prone to breakage. Therefore, when the width of the end elastic slot 4 is in the range of 0.3mm-1mm, the self-adaptive coaxial effect of the drill bit chuck is better. In particular, when the width of the end elastic slot 4 is 0.5mm, the self-adaptive coaxial effect of the drill bit chuck is especially good.

[0033] In some embodiments, such as Figure 3As shown, the chuck body 1 includes a main chuck 5 and a secondary chuck 6. The main chuck 5 is connected to the power source connection end 2. The main chuck 5 and the secondary chuck 6 can be assembled to form a clamping end 7, for example, by assembling them vertically or horizontally. In this embodiment, they are assembled vertically, so that the clamping end 7 can be used to clamp the drill bit 12.

[0034] In some embodiments, the main chuck 5 and the auxiliary chuck 6 can be assembled as a single unit or connected by various fastening mechanisms 8 such as screws, clips, and pins. In this embodiment, the auxiliary chuck 6 is fixedly mounted on the main chuck 5 by screws.

[0035] In some embodiments, the auxiliary chuck 6 includes a first end 61 near the power source connection end 2 and a second end 62 near the clamping end 7; the first end 61 has a first elastic slot 91 and a second elastic slot 92 cut axially on both sides, perpendicular to the main chuck 5, the first elastic slot 91 and the second elastic slot 92 dividing the first end 61 into three parts: a first left end 61a, a first middle end 61b, and a first right end 61c; a spring 10 parallel to the main chuck 5 is provided between the first elastic slot 91 and the second elastic slot 92. (The parallelism refers to the fact that the plane of the spring 10 passing through the axis does not intersect the plane of the main chuck 5 passing through the axis.) The two ends of the spring 10 elastically abut against the first left end 61a and the first right end 61c, respectively. The auxiliary chuck 6 has a third elastic slit 93 perpendicular to the main chuck 5 cut along the axial direction in the middle of the second end 62 near the clamping end 7. The third elastic slit 93 divides the second end 62 into a second left end 62a and a second right end 62b. The first elastic slit 91, the second elastic slit 92, and the third elastic slit 93 are not connected to each other.

[0036] When no external force is applied to the first left end 61a and the first right end 61c, the thrust of the spring 10 pushes the first left end 61a and the first right end 61c outwards, and the first elastic slot 91, the second elastic slot 92 and the third elastic slot 93 pass through the joint of the first end 61 and the second end 62. Figure 4The reverse movement of the middle AA position allows the second left end 62a and the second right end 62b to clamp together, thereby clamping the drill bit 12 at the clamping end 7. When an inward external force is applied to the first left end 61a and the first right end 61c to bring them closer to the first middle end 61b, the first elastic slot 91, the second elastic slot 92, and the third elastic slot 93 move in opposite directions through the joint between the first end 61 and the second end 62, allowing the second left end 62a and the second right end 62b to open. At this point, the drill bit 12 can be removed or inserted. After inserting the drill bit 12, removing the external force on the first left end 61a and the first right end 61c allows the second left end 62a and the second right end 62b to remain clamped under the pushing force of the spring 10. This solution replaces the original solution of using a clamping mechanism to hold the drill bit 12, reducing wear on the drill bit 12 during use and making installation and replacement more convenient.

[0037] In some embodiments, the first middle end 61b is fixedly connected to the main chuck 5 and has a spring 10 parallel to the main chuck 5 installed inside; the first left end 61a and the first right end 61c have limiting studs 11 parallel to the main chuck 5 installed inside; the two ends of the spring 10 elastically abut against the limiting studs 11 at the left and right ends respectively, and the limiting studs 11 are used to apply external force to the first left end 61a and the first right end 61c, which can make the assembly of the drill bit 12 more convenient.

[0038] In some embodiments, the second left end 62a and the second right end 62b form a funnel-shaped opening at the clamping end 7, and the drill bit 12 is inserted from top to bottom, which makes it easier to assemble the drill bit 12 into the clamping end 7, and is also applicable to drill bits 12 with a larger diameter.

[0039] In some embodiments, the first elastic slot 91, the second elastic slot 92, and the third elastic slot 93 are all "T"-shaped with their tops facing the joint of the first end 61 and the second end 62, such that the directions of the first elastic slot 91, the second elastic slot 92, and the third elastic slot 93 are opposite. The use of this "T"-shaped first elastic slot 91, the second elastic slot 92, and the third elastic slot 93 results in better force transmission and can better achieve the opening and clamping of the clamping end 7.

[0040] In some embodiments, a gap is provided between the main chuck 5 and the auxiliary chuck 6. During the opening and clamping process of the clamping end 7, the gap can prevent the first left end 61a, the first right end 61c, the second left end 62a, and the second right end 62b from rubbing against the main chuck 5 during displacement, thus preventing wear.

[0041] Second Embodiment

[0042] As another implementation, the elastic slot 9, spring 10, and limiting stud 11 on the main chuck 5 and the auxiliary chuck 6 can adopt the following structural scheme:

[0043] The main chuck 5 and the auxiliary chuck 6 can be connected as a single unit, or they can be connected by various fastening mechanisms 8 such as screws, clips, and pins. In this embodiment, the main chuck 5 and the auxiliary chuck 6 are connected as a single unit. Figure 5 , 6 As shown, the main chuck 5 and the auxiliary chuck 6 are connected at the point of integral connection (or at the point of connection of fastening mechanism 8 if they are connected by fastening mechanism 8) and are provided at both ends along the axial direction, with a fourth elastic slot 94 and a fifth elastic slot 95 that are not connected to each other. Taking the point of integral connection (or at the point of connection of fastening mechanism 8 if they are connected by fastening mechanism 8) as the dividing line, the auxiliary chuck 6 includes a first end 61 near the power source connection end 2 and a second end 62 near the clamping end 7. The first end 61 is on the fourth elastic slot 94 and the second end 62 is on the fifth elastic slot 95.

[0044] When a downward force is applied to the first end 61 of the drill bit chuck with the above structure, causing the first end 61 to move closer to the main chuck 5, the second end 62 moves upward due to the reverse action of the fourth elastic slot 94, the fifth elastic slot 95 and the fixed connection point (the position of the integral connection or the fastening mechanism 8) located between the fourth elastic slot 94 and the fifth elastic slot 95. This allows the clamping end 7 to open and the drill bit 12 to be assembled.

[0045] In some embodiments, the secondary chuck 6 is equipped with a spring 10 and a limiting stud 11 perpendicular to the main chuck 5 on a first end 61 near the power source connection end 2. The two ends of the spring 10 elastically abut against the main chuck 5 and the limiting stud 11, respectively.

[0046] With the above-described drill bit chuck structure, when no external force is applied to the first end 61, the thrust of the spring 10 pushes the first end 61 upward. Through the opposing action of the fourth elastic slot 94, the fifth elastic slot 95, and the fixed connection point located between the fourth elastic slot 94 and the fifth elastic slot 95, the second end 62 moves downward, thereby achieving clamping of the drill bit 12 by the clamping end 7. When a downward external force is applied to the first end 61 by the limiting stud 11, causing it to compress the spring 10 and move closer to the main chuck 5, the opposing action of the fourth elastic slot 94, the fifth elastic slot 95, and the fixed connection point located between the fourth elastic slot 94 and the fifth elastic slot 95 causes the second end 62 to move upward. At this time, the drill bit 12 can be removed or inserted. After inserting the drill bit 12, the external force on the first end 61 is removed, and under the thrust of the spring 10, the clamping end 7 can continue to maintain the clamped state. The above-mentioned fourth elastic joint 94, fifth elastic joint 95, spring 10 and limiting stud 11 replace the original scheme of using a clamping mechanism to press down the drill bit 12, reducing the wear on the drill bit 12 during use, and making installation and replacement more convenient.

[0047] In some embodiments, the fourth elastic slot 94 and the fifth elastic slot 95 are both "T" shaped with their tops facing the joint of the first end (61) and the second end (62), so that the fourth elastic slot 94 and the fifth elastic slot 95 are in opposite directions. The fourth elastic slot 94 and the fifth elastic slot 95 with this "T" shape have better force transmission and can better realize the opening and clamping of the clamping end 7.

[0048] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. All equivalent changes made in accordance with the shape, structure and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A drill bit chuck comprising a chuck body (1) and a power source connection end (2), characterized in that, At least one set of through holes (3) is provided on the outer peripheral surface of the power source connection end (2). The through hole set (3) includes two adjacent and axially symmetrical first through holes (31) and second through holes (32). An end elastic slot (4) is formed between the two ends of the first through holes (31) and the second through holes (32) along the outer peripheral surface. The chuck body (1) includes a main chuck (5) and a secondary chuck (6). The main chuck (5) is connected to the power source connection end (2). The main chuck (5) and the secondary chuck (6) are assembled to form a clamping end (7). The secondary chuck (6) includes a clamping end (7) near the power source connection end (2). The first end (61) of the source connection end (2) and the second end (62) near the clamping end (7) have a first elastic slot (91) and a second elastic slot (92) cut through the first end (61) along the axial direction on both sides, perpendicular to the main chuck (5). A spring (10) parallel to the main chuck (5) is provided between the first elastic slot (91) and the second elastic slot (92). The second end (62) has a third elastic slot (93) cut through the second end (62) along the axial direction, perpendicular to the main chuck (5). The first elastic slot (91), the second elastic slot (92), and the third elastic slot (93) are not connected to each other.

2. The drill bit chuck according to claim 1, characterized in that, Multiple sets of through holes (3) with different cross sections are provided on the outer peripheral surface of the power source connection end (2), and the first through hole (31) and the second through hole (32) in the through hole group (3) each form an end elastic slit (4) along the outer peripheral surface between their two ends.

3. The drill bit chuck according to claim 1, characterized in that, Multiple sets of through holes (3) with the same cross-section are provided on the outer peripheral surface of the power source connection end (2), and the first through hole (31) and the second through hole (32) in the through hole group (3) are cut along the outer peripheral surface to form an end elastic slit (4) between their respective ends. The end elastic slit (4) is curved and does not intersect each other.

4. The drill bit chuck according to claim 1, characterized in that, The main chuck (5) and the auxiliary chuck (6) are connected as a single unit or through a fastening mechanism (8).

5. The drill bit chuck according to claim 1, characterized in that, The first elastic slot (91) and the second elastic slot (92) divide the first end (61) into a first left end (61a), a first middle end (61b) and a first right end (61c); the first middle end (61b) is fixedly connected to the main chuck (5) and is equipped with a spring (10) parallel to the main chuck (5); the first left end (61a) and the first right end (61c) are equipped with limiting studs (11) parallel to the main chuck (5); the two ends of the spring (10) elastically abut against the limiting studs (11) at the left and right ends respectively.

6. The drill bit chuck according to claim 5, characterized in that, The third elastic slit (93) divides the second end (62) into a second left end (62a) and a second right end (62b); the second left end (62a) and the second right end (62b) form a funnel-shaped opening at the clamping end (7).

7. The drill bit chuck according to claim 4, characterized in that, Starting from the position where the main clamp (5) and the auxiliary clamp (6) are connected by an integral connection or a fastening mechanism (8), there are a fourth elastic seam (94) and a fifth elastic seam (95) that are not connected to each other along the axial direction at both ends.

8. The drill bit chuck according to claim 7, characterized in that, The auxiliary chuck (6) has a spring (10) and a limiting stud (11) perpendicular to the main chuck (5) installed on its first end (61) near the power source connection end (2). The two ends of the spring (10) elastically abut against the main chuck (5) and the limiting stud (11) respectively.

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