Chuck for power drive

Abstract

The utility model relates to a chuck for a power driver, which comprises a main body provided with a first part and a second part, the first part is provided with an axial hole and a plurality of channels, the axial hole is formed in the first part, the channels penetrate through the first part and intersect with the axial hole, and the second part is configured to rotate together with a driving shaft of the power driver; the plurality of clamping jaws are movably arranged in the channel; a sleeve rotatably mounted around the body, the sleeve including an inner sleeve and an outer sleeve; and an elastic body located between the sleeve or a first component configured to cooperate with the sleeve to increase resistance to motion relative to the sleeve and the main body or a second component configured to cooperate with the main body to increase resistance to motion relative to the main body to mitigate vibration of the sleeve relative to the main body, thereby preventing automatic loosening or over-tightening of the sleeve.

Description

Technical Field

[0001] The utility model relates to a chuck for a power driver, and more particularly to a chuck for preventing the automatic loosening or over-tightening of a sleeve. Background Art

[0002] Manual and electric or pneumatic tool drivers are well known. A twist drill is the most common tool on such drivers. In addition, the tool may also include a screwdriver, a nut driver, a burr, a mounted grindstone, and other cutting or grinding tools. Each tool may include a tool shank for operably connecting the tool to the driver. Since the tool shank may have different diameters or polygonal cross-sections, the driver is usually provided with a chuck that can be adjusted within a relatively wide range. The chuck can be connected to the driver through a threaded hole or a tapered hole.

[0003] A variety of chucks have been developed in the art. However, in the prior art chucks, the vibration of the sleeve during drilling can cause the problem of self-opening or self-tightening of the sleeve, which brings great inconvenience and danger to the continuous use of the chuck. Summary of the Utility Model

[0004] To solve the problem that the vibration of the sleeve during drilling can cause the self-opening or self-tightening of the sleeve, the utility model provides a novel chuck. The chuck according to the utility model includes: a main body having a first part and a second part, the first part having an axial hole formed therein and a plurality of channels formed through the first part and intersecting the axial hole, the second part being configured to rotate together with the drive shaft of the power driver; a plurality of jaws movably disposed in the channels; a sleeve rotatably mounted around the main body, the sleeve including an inner sleeve and an outer sleeve; and an elastomer located between the sleeve or a first member configured to cooperate with the sleeve to increase the movement resistance of the sleeve and the main body or a second member configured to cooperate with the main body to increase the movement resistance of the main body to slow down the vibration of the sleeve relative to the main body, thereby preventing the automatic loosening or over-tightening of the sleeve. In the chuck according to the utility model, the elastomer is located between the sleeve and the main body, or between the first member configured to cooperate with the sleeve to increase the movement resistance of the sleeve and the main body, or between the sleeve and the second member configured to cooperate with the main body to increase the movement resistance of the main body, or between the first member configured to cooperate with the sleeve to increase the movement resistance of the sleeve and the second member configured to cooperate with the main body to increase the movement resistance of the main body. Due to the arrangement of the elastomer, the vibration of the sleeve relative to the main body is slowed down or the resistance to the rotation of the sleeve relative to the main body is increased, so that the automatic loosening or over-tightening of the sleeve can be prevented, and further the convenience and safety of the continuous use of the chuck can be increased.

[0005] In an embodiment according to the present utility model, the second component is a steel cap, which cooperates with the first part of the main body, wherein an elastomer is disposed between the steel cap and the inner sleeve or the outer sleeve, so that the interaction force between the inner sleeve or the outer sleeve and the steel cap is increased. Preferably, the steel cap and the first part of the main body are interference-fitted or fixedly connected or integrally formed. Since the steel cap cooperates with the first part of the main body, the movement resistance of the steel cap relative to the first part of the main body is increased or inhibited. Furthermore, the elastomer configured to be disposed between the steel cap and the inner sleeve or the outer sleeve can slow down or inhibit the movement of the steel cap relative to the inner sleeve or the outer sleeve or increase the movement resistance of the steel cap relative to the inner sleeve or the outer sleeve, thereby being able to slow down the vibration of the inner sleeve or the outer sleeve relative to the main body or increase the resistance to rotation of the inner sleeve or the outer sleeve relative to the main body, and further being able to prevent the automatic loosening or over-tightening of the sleeve. In one variant, the elastomer is configured to be disposed between the steel cap and the inner sleeve in the radial direction or the axial direction. In another variant, the elastomer is disposed between the steel cap and the outer sleeve in the radial direction or the axial direction. In yet another variant, the inner wall of the steel cap has a U-shaped configuration, and the elastomer is disposed against the inner wall of the steel cap at different positions.

[0006] In another embodiment according to the present utility model, the second component is a steel cap, which cooperates with the first part of the main body, and the first component is a nut retainer, which cooperates with the inner sleeve, wherein an elastomer is disposed between the nut retainer and the steel cap, so that the interaction force between the nut retainer and the steel cap is increased. Preferably, the steel cap and the first part of the main body are interference-fitted or fixedly connected or integrally formed. Preferably, the nut retainer and the inner sleeve are interference-fitted or fixedly connected or integrally formed. Since the steel cap cooperates with the first part of the main body, the movement resistance of the steel cap relative to the first part of the main body is increased or inhibited; similarly, since the nut retainer cooperates with the inner sleeve, the movement resistance of the nut retainer relative to the inner sleeve is also increased or inhibited. Therefore, the elastomer configured to be disposed between the nut retainer and the steel cap can slow down or inhibit the movement of the nut retainer relative to the steel cap or increase the movement resistance of the nut retainer relative to the steel cap, thereby being able to slow down the vibration of the inner sleeve relative to the main body or increase the resistance to rotation of the inner sleeve relative to the main body, and thus being able to prevent the automatic loosening or over-tightening of the sleeve.

[0007] In another embodiment according to the present utility model, the second component is a rear cover, and the rear cover cooperates with the second part of the main body. Among them, the elastic body is arranged between the outer sleeve and the rear cover in the radial direction or the axial direction, so that the interaction force between the outer sleeve and the rear cover is increased. Preferably, the rear cover is in interference fit or fixedly connected with the second part of the main body. Since the rear cover cooperates with the second part of the main body, the movement resistance of the rear cover relative to the second part of the main body is increased or inhibited. Furthermore, the elastic body arranged between the rear cover and the outer sleeve is configured to be able to slow down or inhibit the movement of the rear cover relative to the outer sleeve or increase the movement resistance of the rear cover relative to the outer sleeve, so that the vibration of the outer sleeve relative to the main body can be slowed down or the resistance to the rotation of the outer sleeve relative to the main body can be increased, thereby preventing the automatic loosening or over-tightening of the sleeve.

[0008] In yet another embodiment according to the present utility model, the first component is a rear cover, and the rear cover cooperates with the outer sleeve. Among them, the elastic body is arranged between the second part of the main body and the rear cover in the radial direction or the axial direction, so that the interaction force between the rear cover and the second part of the main body is increased. Preferably, the rear cover is in interference fit or fixedly connected with the outer sleeve. Since the rear cover cooperates with the outer sleeve, the movement resistance of the rear cover relative to the outer sleeve is increased or inhibited. Furthermore, the elastic body arranged between the rear cover and the second part of the main body is configured to be able to slow down or inhibit the movement of the rear cover relative to the main body or increase the movement resistance of the rear cover relative to the main body, so that the vibration of the outer sleeve relative to the main body can be slowed down or the resistance to the rotation of the outer sleeve relative to the main body can be increased, thereby preventing the automatic loosening or over-tightening of the sleeve.

[0009] In yet another embodiment according to the present utility model, the second component is a nut retainer, which cooperates with the first part of the main body. Among them, the elastic body is arranged between the nut retainer and the inner sleeve, so that the interaction force between the nut retainer and the inner sleeve is increased. Preferably, the nut retainer is in interference fit or fixedly connected or integrally formed with the first part of the main body. Since the nut retainer cooperates with the first part of the main body, the movement resistance of the nut retainer relative to the first part of the main body is increased or inhibited. Furthermore, the elastic body arranged between the nut retainer and the inner sleeve is configured to be able to slow down or inhibit the movement of the nut retainer relative to the inner sleeve or increase the movement resistance of the nut retainer relative to the inner sleeve, so that the vibration of the inner sleeve relative to the main body can be slowed down or the resistance to the rotation of the inner sleeve relative to the main body can be increased, thereby preventing the automatic loosening or over-tightening of the sleeve.

[0010] In yet another embodiment according to the present utility model, the first component is a nut retainer which cooperates with the inner sleeve, wherein an elastomer is disposed between the nut retainer and the first part of the body such that the interaction force between the nut retainer and the first part of the body is increased. Preferably, the nut retainer and the inner sleeve are interference-fitted or fixedly connected or integrally formed. Since the nut retainer cooperates with the inner sleeve, the movement resistance of the nut retainer relative to the inner sleeve is increased or inhibited, and thus the elastomer disposed between the nut retainer and the first part of the body can slow down or inhibit the movement of the nut retainer relative to the body or increase the movement resistance of the nut retainer relative to the body, thereby being able to slow down the vibration of the inner sleeve relative to the body or increase the resistance to rotation of the inner sleeve relative to the body, so as to prevent the automatic loosening or over-tightening of the sleeve.

[0011] In yet another embodiment according to the present utility model, the first component is a sleeve cover which at least partially covers the inner sleeve and cooperates with the inner sleeve, and the second component is a snap ring located above the sleeve cover and cooperating with the first part of the body. Preferably, the sleeve cover cooperates with the inner sleeve such that the movement of the sleeve cover relative to the inner sleeve is restricted at least in the axial direction. Preferably, the snap ring cooperates with the first part of the body such that the movement of the snap ring relative to the first part of the body is restricted at least in the axial direction. In a variant, the elastomer is disposed in the axial direction between the sleeve cover and the snap ring such that the axial interaction force between the sleeve cover and the snap ring is increased, thereby being able to slow down or inhibit the movement of the sleeve cover relative to the snap ring or increase the movement resistance of the sleeve cover relative to the snap ring. In addition, since the movement of the sleeve cover relative to the inner sleeve is restricted at least in the axial direction and the movement of the snap ring relative to the first part of the body is restricted at least in the axial direction, the elastomer disposed between the sleeve cover and the snap ring can slow down the vibration of the inner sleeve relative to the body or increase the resistance to rotation of the inner sleeve relative to the body, so as to prevent the automatic loosening or over-tightening of the sleeve. In yet another variant, the snap ring is in the form of a wave spring.

[0012] In yet another embodiment according to the present utility model, the elastomer is disposed in the radial direction or the axial direction between the inner sleeve and the first part of the body such that the interaction force between the inner sleeve and the first part of the body is increased, thereby being able to slow down or inhibit the vibration of the inner sleeve relative to the body or increase the resistance to rotation of the inner sleeve relative to the body, so as to prevent the automatic loosening or over-tightening of the sleeve.

[0013] In yet another embodiment according to the present utility model, the elastomer is disposed in the radial direction or the axial direction between the outer sleeve and the second part of the body such that the interaction force between the outer sleeve and the second part of the body is increased, thereby being able to slow down or inhibit the vibration of the outer sleeve relative to the body or increase the resistance to rotation of the outer sleeve relative to the body, so as to prevent the automatic loosening or over-tightening of the sleeve.

[0014] In another embodiment according to the present utility model, the elastomer is in the form of a rubber ring.

[0015] In another embodiment according to the present utility model, the elastomer is in the form of a wave spring.

[0016] With the chuck for a power driver according to the present utility model, the elastomer is located between the sleeve and the body, or between the first component configured to cooperate with the sleeve to increase the movement resistance of the sleeve and the body, or between the sleeve and the second component configured to cooperate with the body to increase the movement resistance of the body, or between the first component configured to cooperate with the sleeve to increase the movement resistance of the sleeve and the second component configured to cooperate with the body to increase the movement resistance of the body. Due to the arrangement of the elastomer, the vibration of the sleeve relative to the body is reduced or the resistance to the rotation of the sleeve relative to the body is increased, thereby preventing the automatic loosening or over-tightening of the sleeve, and further increasing the convenience and safety of continuous use of the chuck. Description of the Drawings

[0017] One or more embodiments are exemplarily illustrated by the diagrams in the corresponding drawings. These exemplary illustrations do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated. The drawings in the figures do not constitute a scale limitation, where:

[0018] Figure 1A-1E is a schematic diagram of an embodiment of the chuck according to the present utility model;

[0019] Figure 1F is a schematic diagram of another embodiment of the chuck according to the present utility model

[0020] Figure 2A-2C is a schematic diagram of another embodiment of the chuck according to the present utility model;

[0021] Figure 3A-3C is a schematic diagram of another embodiment of the chuck according to the present utility model;

[0022] Figure 4A-4B is a schematic diagram of another embodiment of the chuck according to the present utility model;

[0023] Figure 4C is a schematic diagram of another embodiment of the chuck according to the present utility model;

[0024] Figure 4D is a schematic diagram of another embodiment of the chuck according to the present utility model

[0025] Figure 5A-5C is a schematic diagram of another embodiment of the chuck according to the present utility model. Detailed Description of the Invention

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will elaborate on each embodiment of the present utility model in conjunction with the accompanying drawings. The following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. Even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed by the present utility model can still be achieved.

[0027] In the description of the present utility model, the terms "first", "second", "third" are only used to describe features, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features or implicitly specifying the sequence of the indicated technical features.

[0028] In the description of the present utility model, unless otherwise clearly defined, words such as "provided with", "set", "connected", "joined" should be understood in a broad sense, and those skilled in the relevant technical field can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0029] The following will further elaborate on the chuck of the present utility model in conjunction with the accompanying drawings.

[0030] The chuck for a power drive according to the present utility model is particularly provided with an elastomer, which is configured to abut against at least one of the inner sleeve, outer sleeve, or body to dampen the vibration of the inner sleeve or outer sleeve, thereby preventing the automatic loosening or over-tightening of the sleeve, ensuring the safe continuous use of the chuck.

[0031] In a first embodiment of the chuck for a power drive according to the present utility model, as Figure 1AAs shown, the chuck 110 includes a first portion 112, a second portion 114, an inner sleeve 124, an outer sleeve 126, and a plurality of jaws 120. The first portion 112 and the second portion 114 may be generally cylindrical in shape and may be formed of a metal such as steel, aluminum, or other suitable durable material. The first portion 112 and the second portion 114 together form the body of the chuck 110. The first portion 112 and the second portion 114 include a central axis 116 extending along their length. The first portion 112 may include a head or front portion, and the second portion 114 may include a tail or rear portion. The first portion 112 has an axial hole 118 formed therein and a plurality of channels 122 formed through the first portion 112 and intersecting the axial hole 118. The second portion is configured to rotate with the drive shaft of the power driver. The head of the first portion 112 may define the axial hole 118, and the size of the axial hole 118 may be slightly larger than, for example, the largest tool shank that a tool may be designed to accommodate. A threaded hole may be formed in the tail of the second portion 114 and sized to mate with the drive shaft of a power driver or a manual driver.

[0032] A sleeve composed of the inner sleeve 124 and the outer sleeve 126 is rotatably mounted around the body composed of the first portion 112 and the second portion 114. The inner sleeve 124 and / or the outer sleeve 126 may be molded or otherwise fabricated from a structural plastic or a mixture of structural plastic materials, such as nylon, polycarbonate, filled polypropylene (e.g., glass-filled polypropylene). Other composite materials, such as graphite-filled polymers, may also be suitable for certain environments. Those skilled in the art will understand that the materials from which the chuck 110 may be fabricated may depend on the end use of the chuck 110, and the above materials are provided only as examples.

[0033] As Figure 1A and 1BAs shown, in one variant, the chuck 110 further includes a steel cap 130 that mates with the first portion 112 of the body. Preferably, the steel cap 130 is interference-fitted, fixedly connected, or integrally formed with the first portion 112 of the body, such that the resistance to movement of the steel cap 130 relative to the first portion 112 of the body is increased or its movement is inhibited. In addition, the chuck 110 further includes an elastomer 128 disposed between the steel cap 130 and the inner sleeve 124 or the outer sleeve 126, such that the interaction force between the inner sleeve 124 or the outer sleeve 126 and the steel cap 130 is increased, thereby increasing the resistance to movement of the inner sleeve 124 or the outer sleeve 126 relative to the steel cap 130. In this variant, the second component that mates with the body is the steel cap 130, which mates with the first portion 112 of the body. Since the resistance to movement of the steel cap 130 relative to the first portion 112 of the body is increased or inhibited, the elastomer configured to be disposed between the steel cap 130 and the inner sleeve 124 or the outer sleeve 126 can slow down or inhibit the movement of the steel cap 130 relative to the inner sleeve 124 or the outer sleeve 126 or increase the resistance to movement of the steel cap 130 relative to the inner sleeve 124 or the outer sleeve 126, thereby being able to slow down the vibration of the inner sleeve 124 or the outer sleeve 126 relative to the body or increase the resistance to rotation of the inner sleeve or the outer sleeve relative to the body, thus preventing the automatic loosening or over-tightening of the sleeve.

[0034] In one variant, the elastomer 128 is disposed radially between the steel cap 130 and the inner sleeve 124, as Figure 1B shown; in this variant, the elastomer 128 can slow down or inhibit the movement of the steel cap 130 relative to the inner sleeve 124 or increase the resistance to movement of the steel cap 130 relative to the inner sleeve 124, thereby being able to slow down the vibration of the inner sleeve 124 relative to the body or increase the resistance to rotation of the inner sleeve relative to the body, thus preventing the automatic loosening or over-tightening of the sleeve. In another variant, the elastomer 128 is disposed axially between the steel cap 130 and the inner sleeve 124, as Figure 1C shown; similarly, in this variant, the elastomer 128 can slow down or inhibit the movement of the steel cap 130 relative to the inner sleeve 124 or increase the resistance to movement of the steel cap 130 relative to the inner sleeve 124, thereby being able to slow down the vibration of the inner sleeve 124 relative to the body or increase the resistance to rotation of the inner sleeve relative to the body, thus preventing the automatic loosening or over-tightening of the sleeve.

[0035] In another variant, the elastomer 128 is disposed axially between the steel cap 130 and the outer sleeve 126, as Figure 1DAs shown; in this variant, the elastomer 128 can slow down or inhibit the movement of the steel cap 130 relative to the outer sleeve 126 or increase the resistance to the movement of the steel cap 130 relative to the outer sleeve 126, so as to be able to slow down the vibration of the outer sleeve 126 relative to the main body or increase the resistance to the rotation of the outer sleeve 126 relative to the main body, thereby preventing the automatic loosening or over-tightening of the sleeve. In another variant, the elastomer 128 is arranged between the steel cap 130 and the outer sleeve 126 in the radial direction, as Figure 1E shown; similarly, in this variant, the elastomer 128 can slow down or inhibit the movement of the steel cap 130 relative to the outer sleeve 126 or increase the resistance to the movement of the steel cap 130 relative to the outer sleeve 126, so as to be able to slow down the vibration of the outer sleeve 126 relative to the main body or increase the resistance to the rotation of the outer sleeve 126 relative to the main body, thereby preventing the automatic loosening or over-tightening of the sleeve.

[0036] In yet another variant, the inner wall of the steel cap 130 has a U-shaped configuration, and the elastomer 128 can be arranged at different positions against the inner wall of the steel cap.

[0037] In yet another variant, as Figure 1F shown, the chuck further includes a steel cap 130 that mates with the first part 112 of the main body. Preferably, the steel cap 130 is interference-fitted or fixedly connected or integrally formed with the first part 112 of the main body, so that the relative movement between the two is inhibited. And the chuck further includes a nut retainer 132 that mates with the inner sleeve 124. Preferably, the nut retainer 132 is interference-fitted or fixedly connected or integrally formed with the inner sleeve 124, so that the relative movement between the two is inhibited. The elastomer 128 is arranged in the axial gap between the nut retainer 132 and the steel cap 130, so that the interaction force between the nut retainer 132 and the steel cap 130 is increased, thereby increasing the resistance to the relative movement between the two. In this variant, since the steel cap 130 mates with the first part 112 of the main body, the resistance to the movement of the steel cap 130 relative to the first part 112 of the main body is increased or inhibited; similarly, since the nut retainer 132 mates with the inner sleeve 124, the resistance to the movement of the nut retainer 132 relative to the inner sleeve 124 is also increased or inhibited. In this variant, the second component that mates with the main body is the steel cap, which mates with the first part of the main body. The first component that mates with the sleeve is the nut retainer, which mates with the inner sleeve. Therefore, the elastomer 128 configured to be arranged between the nut retainer 132 and the steel cap 130 can slow down or inhibit the movement of the nut retainer 132 relative to the steel cap 130 or increase the resistance to the movement of the nut retainer 132 relative to the steel cap 130, so as to be able to slow down the vibration of the inner sleeve 124 relative to the main body or increase the resistance to the rotation of the inner sleeve 124 relative to the main body, thereby preventing the automatic loosening or over-tightening of the sleeve.

[0038] In another embodiment of the chuck for a power driver according to the present utility model, as Figure 2A shown, similar to the first embodiment, the chuck 210 includes a first portion 212, a second portion 214, an inner sleeve 224, an outer sleeve 226, and a plurality of jaws 220. The first portion 212 and the second portion 214 may be generally cylindrical in shape and may be formed of a metal such as steel, aluminum, or other suitable durable material. The first portion 212 and the second portion 214 together form the body of the chuck 210. The first portion 212 and the second portion 214 include a central axis 216 extending along their length. The first portion 212 may include a head or a front portion, and the second portion 214 may include a tail or a rear portion. The first portion 212 has an axial hole 218 formed therein and a plurality of channels 222 formed through the first portion 212 and intersecting the axial hole 218. The second portion is configured to rotate with the drive shaft of the power driver. The head of the first portion 212 may define the axial hole 218, and the size of the axial hole 218 may be slightly larger than, for example, the maximum tool shank that a tool can be designed to accommodate. A threaded hole may be formed in the tail of the second portion 214, and its size may be adapted to cooperate with the drive shaft of the power driver or a manual driver.

[0039] Different from the first embodiment, this embodiment of the chuck for a power driver according to the present utility model further includes a rear cover 230 cooperating with the second portion 214. Optionally, the rear cover 230 is interference-fitted or fixedly connected to the second portion 214 of the body, so that the relative movement between the two is inhibited. And the chuck further includes an elastomer 228 disposed between the outer sleeve 226 and the rear cover 230, so that the interaction force between the outer sleeve 226 and the rear cover 230 is increased. In this variant, the second component cooperating with the body is the rear cover 230, which cooperates with the second portion 214 of the body. Since the rear cover 230 cooperates with the second portion 214 of the body, the movement resistance of the rear cover 230 relative to the second portion 214 of the body is increased or inhibited. Furthermore, the elastomer 228 configured to be disposed between the rear cover 230 and the outer sleeve 226 can slow down or inhibit the movement of the rear cover 230 relative to the outer sleeve 226 or increase the movement resistance of the rear cover 230 relative to the outer sleeve 226, thereby being able to slow down the vibration of the outer sleeve 226 relative to the body or increase the resistance to rotation of the outer sleeve 226 relative to the body, so as to prevent the automatic loosening or over-tightening of the sleeve. In one variant, the elastomer 228 is disposed between the outer sleeve 226 and the rear cover 230 in the radial direction, as Figure 2B shown. In another variant, the elastomer 228 is disposed between the outer sleeve 226 and the rear cover 230 in the axial direction, as Figure 2C shown.

[0040] In yet another embodiment of the chuck for a power driver according to the present utility model, asFigure 3A As shown, similar to the first embodiment, the chuck 310 includes a first part 312, a second part 314, an inner sleeve 324, an outer sleeve 326, and a plurality of jaws 320. The first part 312 and the second part 314 may be generally cylindrical in shape and may be formed of a metal such as steel, aluminum, or other suitable durable material. The first part 312 and the second part 314 together constitute the body of the chuck 310. The first part 312 and the second part 314 include a central axis 316 extending along their length. The first part 312 may include a head or a front portion, and the second part 314 may include a tail or a rear portion. The first part 312 has an axial hole 318 formed therein and a plurality of channels 322 formed through the first part 312 and intersecting the axial hole 318. The second part is configured to rotate with the drive shaft of the power driver. The head of the first part 312 may define the axial hole 318, and the size of the axial hole 318 may be slightly larger than, for example, the maximum tool shank that a tool can be designed to accommodate. A threaded hole may be formed in the tail of the second part 314, and its size may be adapted to mate with the drive shaft of a power driver or a manual driver.

[0041] Different from the first embodiment, this embodiment of the chuck for a power driver according to the present invention further includes a rear cover 330 that mates with the outer sleeve 326. Preferably, the rear cover is interference-fitted or fixedly connected to the outer sleeve, such that relative movement between the two is prevented or inhibited. The chuck further includes an elastomer 328 disposed between the second part 314 and the rear cover 330, such that the interaction force between the rear cover 330 and the second part 314 of the body is increased. In this variant, the first component that mates with the sleeve is the rear cover 330, which mates with the outer sleeve 326. Since the rear cover 330 mates with the outer sleeve 326, the resistance to movement of the rear cover 330 relative to the outer sleeve 326 is increased or inhibited. Further, the elastomer 328 configured to be disposed between the rear cover 330 and the second part 314 of the body can slow down or inhibit the movement of the rear cover 330 relative to the body or increase the resistance to movement of the rear cover relative to the body, thereby being able to slow down the vibration of the outer sleeve 330 relative to the body or increase the resistance to rotation of the outer sleeve relative to the body, so as to prevent the automatic loosening or over-tightening of the sleeve. In one variant, the elastomer 328 is disposed between the second part 314 and the rear cover 330 in the radial direction, as Figure 3B shown. In another variant, the elastomer 328 is disposed between the second part 314 and the rear cover 330 in the axial direction, as Figure 3C shown.

[0042] In yet another embodiment of the chuck for a power driver according to the present invention, as Figure 4AAs shown, similar to the first embodiment, the chuck 410 includes a first part 412, a second part 414, an inner sleeve 424, an outer sleeve 426, and a plurality of jaws 420. The first part 412 and the second part 414 may be generally cylindrical in shape and may be formed of a metal such as steel, aluminum, or other suitable durable material. The first part 412 and the second part 414 together form the body of the chuck 410. The first part 412 and the second part 414 include a central axis 416 extending along their length. The first part 412 may include a head or a front portion, and the second part 414 may include a tail or a rear portion. The first part 412 has an axial hole 418 formed therein and a plurality of channels 422 formed through the first part 412 and intersecting the axial hole 418. The second part is configured to rotate with the drive shaft of the power driver. The head of the first part 412 may define the axial hole 418, and the size of the axial hole 418 may be slightly larger than, for example, the maximum tool shank that a tool may be designed to accommodate. A threaded hole may be formed in the tail of the second part 414, and its size may be adapted to mate with the drive shaft of a power driver or a manual driver.

[0043] Different from the first embodiment, in one variant, as Figure 4B shown, this embodiment of the chuck for a power driver according to the present invention further includes a nut retainer 432 that mates with the first part 412 of the body or a nut. Preferably, the nut retainer 432 is interference-fitted, fixedly connected, or integrally formed with the first part 412 of the body, such that relative movement between the two is prevented or inhibited. In addition, the chuck 410 further includes an elastomer 428 that is disposed, particularly in the radial direction, between the nut retainer 432 and the inner sleeve 424, such that the interaction force between the nut retainer 432 and the inner sleeve 424 is increased, as Figure 4B shown. In this embodiment, the second component that mates with the body is the nut retainer 432, which mates particularly with the first part 412 of the body. Since the nut retainer 432 mates with the first part 412 of the body, the resistance to movement of the nut retainer 432 relative to the first part 412 of the body is increased or inhibited. Further, the elastomer 428 configured to be disposed between the nut retainer 432 and the inner sleeve 424 can slow down or inhibit the movement of the nut retainer 432 relative to the inner sleeve 424 or increase the resistance to movement of the nut retainer 432 relative to the inner sleeve 424, thereby being able to slow down the vibration of the inner sleeve 424 relative to the body or increase the resistance to rotation of the inner sleeve relative to the body, so as to prevent the automatic loosening or over-tightening of the sleeve.

[0044] In another variant, as Figure 4CAs shown, this embodiment of the chuck for a power driver according to the present utility model further includes a nut retainer 432 that cooperates with the inner sleeve 424. Preferably, the nut retainer 432 is in interference fit, fixedly connected, or integrally formed with the inner sleeve 424, such that relative movement between the two is prevented or inhibited. Additionally, the chuck further includes an elastomer 428 disposed between the nut retainer 432 and the first portion 412 of the body, such that the interaction force between the nut retainer 432 and the first portion 412 of the body is increased, thereby restricting relative movement between the two. In this variant, the first component that cooperates with the sleeve is the nut retainer 432, which cooperates with its inner sleeve 424. Since the nut retainer 432 cooperates with the inner sleeve 424, the resistance to movement of the nut retainer 432 relative to the inner sleeve 424 is increased or inhibited. Furthermore, the elastomer 428 disposed between the nut retainer 432 and the first portion 412 of the body is configured to slow down or inhibit the movement of the nut retainer 432 relative to the body or increase the resistance to movement of the nut retainer 432 relative to the body, thereby being able to slow down the vibration of the inner sleeve 424 relative to the body or increase the resistance to rotation of the inner sleeve 424 relative to the body, and thus preventing the automatic loosening or over-tightening of the sleeve.

[0045] In another variant, the nut retainer 432 is removable, and the chuck 410 further includes an elastomer 428 disposed between the inner sleeve 424 and the first portion 412, as Figure 4D shown. In one variant, the elastomer 428 is disposed axially between the inner sleeve 424 and the first portion 412. In another variant, the elastomer 428 is disposed radially between the inner sleeve 424 and the first portion 412. Since the elastomer 428 is disposed between the inner sleeve 424 and the first portion 412 of the body in the radial or axial direction, the interaction force between the inner sleeve 424 and the first portion 412 of the body is increased, thereby being able to slow down or inhibit the vibration of the inner sleeve 424 relative to the body or increase the resistance to rotation of the inner sleeve 424 relative to the body, and thus preventing the automatic loosening or over-tightening of the sleeve.

[0046] In yet another embodiment of the chuck for a power driver according to the present utility model, as Figure 5AAs shown, similar to the first embodiment, the chuck 510 includes a first part 512, a second part 514, an inner sleeve 524, an outer sleeve 526, and a plurality of jaws 520. The first part 512 and the second part 514 may be generally cylindrical in shape and may be formed of a metal such as steel, aluminum, or other suitable durable material. The first part 512 and the second part 514 together form the body of the chuck 510. The first part 512 and the second part 514 include a central axis 516 extending along their length. The first part 512 may include a head or a front portion, and the second part 514 may include a tail or a rear portion. The first part 512 has an axial hole 518 formed therein and a plurality of channels 522 formed through the first part 512 and intersecting the axial hole 518. The second part is configured to rotate with the drive shaft of the power driver. The head of the first part 512 may define the axial hole 518, and the size of the axial hole 518 may be slightly larger than, for example, the maximum tool shank that a tool can be designed to accommodate. A threaded hole may be formed in the tail of the second part 514, and its size may be adapted to mate with the drive shaft of a power driver or a manual driver.

[0047] Different from the first embodiment, as Figure 5B shown, this embodiment of the chuck for a power driver according to the present invention further includes a sleeve cover 534 that at least partially covers the inner sleeve 524 and mates with the inner sleeve 524, and a snap ring 536 located above the sleeve cover 534 and mating with the first part 512 of the body. Preferably, the sleeve cover 534 mates with the inner sleeve 524 such that the sleeve cover 534 is restricted in movement relative to the inner sleeve 524 at least in the axial direction. Preferably, the snap ring 536 mates with the first part 512 of the body such that the snap ring 536 is restricted in movement relative to the first part 412 of the body at least in the axial direction. In addition, the chuck 510 further includes an elastomer 528, which is disposed especially in the axial direction between the sleeve cover 534 and the snap ring 536, as Figure 5B shown, such that the axial interaction force between the sleeve cover 534 and the snap ring 536 is increased, thereby being able to slow down or inhibit the movement of the sleeve cover 534 relative to the snap ring 536 or increase the movement resistance of the sleeve cover 534 relative to the snap ring 536. In addition, since the sleeve cover 534 is restricted in movement relative to the inner sleeve 524 at least in the axial direction and the snap ring 536 is restricted in movement relative to the first part 512 of the body at least in the axial direction, the elastomer 528 disposed between the sleeve cover 534 and the snap ring 536 can slow down the vibration of the inner sleeve 524 relative to the body or increase the resistance to rotation of the inner sleeve 524 relative to the body, thereby preventing the automatic loosening or over-tightening of the sleeve. In one variant, the snap ring 536 or the elastomer 528 is in the form of a wave spring 538, as Figure 5C shown, and the wave spring 538 has an oval ring shape.

[0048] In other embodiments of the chuck for a power driver according to the present utility model, the chuck may include an elastomer disposed between the outer sleeve and the second part of the main body in the radial direction or the axial direction, such that the interaction force between the outer sleeve and the second part of the main body is increased, thereby being able to slow down or suppress the vibration of the outer sleeve relative to the main body or increase the resistance to rotation of the outer sleeve relative to the main body, so as to prevent the automatic loosening or over-tightening of the sleeve.

[0049] In other embodiments of the chuck for a power driver according to the present utility model, the elastomer according to the present utility model is in the form of a rubber ring. In other embodiments of the chuck for a power driver according to the present utility model, the elastomer according to the present utility model is in the form of a wave spring.

[0050] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A chuck for a power driver, characterized in that: The chuck comprises: a body having a first portion having an axial bore formed therein and a plurality of passages formed through the first portion and intersecting the axial bore, and a second portion configured to rotate with a drive shaft of the power driver; a plurality of jaws movably disposed in the channel; a sleeve rotatably mounted around the body, the sleeve comprising an inner sleeve and an outer sleeve; and An elastomer is located between the sleeve or a first component configured to cooperate with the sleeve to increase the resistance to movement relative to the sleeve and the main body or a second component configured to cooperate with the main body to increase the resistance to movement relative to the main body, so as to reduce the vibration of the sleeve relative to the main body, thereby preventing the sleeve from being automatically loosened or over-tightened.

2. The chuck according to claim 1, characterized in that The second component is a steel cap, which cooperates with the first part of the main body, wherein the elastomer is arranged between the steel cap and the inner sleeve or the outer sleeve.

3. The chuck according to claim 2, characterized in that The elastic body is arranged between the steel cap and the inner sleeve in a radial direction or an axial direction.

4. The chuck according to claim 2, characterized in that The elastic body is arranged between the steel cap and the outer sleeve in a radial direction or an axial direction.

5. The chuck according to claim 2, characterized in that The inner wall of the steel cap has a U-shape, and the elastic body is arranged at different positions against the inner wall of the steel cap.

6. The chuck according to claim 1, characterized in that The second component is a steel cap that cooperates with the first portion of the body, and the first component is a nut retainer that cooperates with the inner sleeve, wherein the elastomer is arranged between the nut retainer and the steel cap.

7. The chuck according to claim 1, characterized in that The second component is a rear cover that is matched with the second portion of the main body, wherein the elastic body is arranged between the outer sleeve and the rear cover in a radial direction or an axial direction.

8. The chuck according to claim 1, characterized in that The first component is a rear cover that is matched with the outer sleeve, wherein the elastic body is arranged between the second portion of the main body and the rear cover in a radial direction or an axial direction.

9. The chuck according to claim 1, characterized in that The second component is a nut retainer that cooperates with the first portion of the body, wherein the elastomer is disposed between the nut retainer and the inner sleeve.

10. The chuck according to claim 1, characterized in that The first component is a nut retainer that cooperates with the inner sleeve, wherein the elastomer is arranged between the nut retainer and the first portion of the body.

11. The chuck according to claim 1, characterized in that The first component is a sleeve cover at least partially covering the inner sleeve and cooperating with the inner sleeve, and the second component is a snap spring located above the sleeve cover and cooperating with the first portion of the body.

12. The chuck according to claim 11, characterized in that The elastic body is arranged between the sleeve cover and the clamping spring in the axial direction.

13. The chuck according to claim 12, characterized in that The circlip is in the form of a wave spring.

14. The chuck according to claim 1, characterized in that The elastic body is arranged between the inner sleeve and the first portion of the body in a radial direction or an axial direction.

15. The chuck according to claim 1, characterized in that The elastic body is arranged between the outer sleeve and the second portion of the main body in a radial direction or an axial direction.

16. A chuck according to any one of claims 1 to 15, characterized in that The elastic body is in the form of a rubber ring.

17. A chuck according to any one of claims 1 to 15, characterized in that The elastic body is in the form of a wave spring.

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