CN106312954B

CN106312954B - Hand-held tool and clamping device thereof

Info

Publication number: CN106312954B
Application number: CN201510363782.XA
Authority: CN
Inventors: 钟红风; 徐静涛
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2015-06-26
Filing date: 2015-06-26
Publication date: 2021-08-10
Anticipated expiration: 2035-06-26
Also published as: CN106312954A

Abstract

The invention discloses a handheld tool and a clamping device thereof. Clamping device for a hand tool, comprising: a clamping unit for fixing the working head in an axial direction; the operating assembly comprises an operating element for operating the clamping unit; the operating assembly further comprises a driving unit fixedly arranged with the operating element, and the operating element is operable to drive the driving unit to rotate around the axial direction, so that the operating assembly is switched between an engagement mode and a disengagement mode, wherein the operating element is connected with the clamping unit in a non-relative rotation mode in the engagement mode; in the disengaged mode, the operating element is in relative rotation with the clamping unit. The handheld tool provided by the invention is provided with the clamping device, the working head can be quickly installed or detached without other auxiliary tools, and the operation interface is very simple and is easy to master by an operator.

Description

Hand-held tool and clamping device thereof

Technical Field

The present invention relates to hand held tools, and more particularly, to a hand held tool and a method of operating the same.

Background

The multifunctional machine is a common handheld swinging handheld tool in the industry, and the working principle of the multifunctional machine is that an output shaft does swinging motion around the axis of the output shaft. Therefore, after the user installs different working heads on the free end of the output shaft, such as a straight saw blade, a circular saw blade, a triangular sanding disc and a shovel-type scraper, various different operation functions can be realized, such as sawing, cutting, grinding, scraping and the like, so as to adapt to different work requirements.

Chinese published patent application No. CN 101780668A discloses a multifunctional machine, which comprises a motor, wherein a motor shaft of the motor is connected with an eccentric pin, and a bearing is sleeved on the eccentric pin, thereby forming an eccentric wheel structure. When the motor shaft rotates, the eccentric wheel structure can do eccentric rotation motion around the axis line of the motor shaft. The output shaft of multi-function machine is perpendicular to the motor shaft setting, and the fork assembly of fixedly connected with on the output shaft, the fork assembly is formed with two relative extension arms, surrounds the eccentric wheel structure, and the inboard of two extension arms all is in close contact with the bearing among the eccentric wheel structure to when the eccentric wheel is eccentric rotatory, the eccentric wheel structure can drive the shift fork and produce the ascending swing motion of horizontal direction, and with the help of the fixed connection of shift fork and output shaft again, make the output shaft do the swing around its axial lead. After different working heads are arranged at the free end of the output shaft, the multifunctional machine can realize multiple operation functions under high-speed swing motion.

However, the existing multifunctional machine still adopts a relatively original mounting mode of the working head, namely, the fastening bolt is loosened by a wrench, and then the fastening element is taken down from the output shaft; similarly, in the installation and the replacement of accessories, the working head can be replaced and screwed down for installation only by unscrewing the fastening bolt with the help of a wrench, so that the operation is very complicated, time-consuming and labor-consuming.

Accordingly, there is a need for an improved hand held tool that addresses the above-mentioned problems.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: provided are a clamping device and a handheld tool with the clamping device, wherein a working head can be reliably mounted on an output shaft without using an auxiliary tool.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a clamping arrangement for a hand-held tool, comprising:

a clamping unit for fixing the working head in the axial direction;

an operating assembly including an operating element for operating the clamping unit;

the operating assembly further comprises a driving unit fixedly arranged with the operating element, and the operating element is operable to drive the driving unit to rotate around the axial direction, so that the operating assembly is switched between an engagement mode and a disengagement mode, wherein the operating element is connected with the clamping unit in a non-relative rotation mode in the engagement mode; in the disengagement mode, the operating element and the clamping unit are rotatable relative to each other.

Preferably, the operating element is translated in the axial direction while rotating about the axial direction.

Preferably, the driving unit rotates by an angle greater than or equal to 360 degrees with respect to the clamping unit.

Preferably, the clamping unit includes a connecting unit, and the driving unit is engaged with the connecting unit by being rotatable about the axial direction while being translated in the axial direction.

Preferably, the driving unit comprises a driving member, the connecting unit comprises a first connecting member and a second connecting member which are arranged in a staggered manner along the axial direction, the driving member can be selectively matched with the first connecting member or the second connecting member, and the operating assembly is in a matched mode; the drive member is disengaged from both the first and second connectors and the operating assembly is in a disengaged mode.

Preferably, the driving member comprises a first mating surface and a second mating surface which are parallel to each other, the first connecting member comprises a first abutting surface, and the second connecting member comprises a first abutting surface, wherein the first mating surface can be selectively engaged with the first abutting surface; the second matching surface can be matched with the first abutting surface selectively.

Preferably, the driving member includes a first driving surface and a second driving surface which are parallel to each other, the first connecting member includes a second abutting surface which is disposed at an angle with respect to the first abutting surface, the second connecting member includes a second abutting surface which is disposed at an angle with respect to the first abutting surface, and the first driving surface is selectively engaged with the second abutting surface; the second driving surface can be matched with the second abutting surface selectively.

Preferably, the driving unit comprises two driving members arranged in a staggered manner along the axial direction, the connecting unit comprises a connecting member which can be selectively matched with one of the two driving members, and the operating assembly is in a matching mode; the drive member is disengaged from both drive members and the operating assembly is in a disengaged mode.

Preferably, the driving unit comprises a driving member provided on the operating element, the clamping unit comprises a connecting member, the driving member can be selectively matched with the connecting member, and the operating assembly is in a matching mode; the drive member is disengaged from the connector and the operating assembly is in a disengaged mode.

Preferably, the driving member includes first and second oppositely disposed driving surfaces, the connecting member includes first and second oppositely disposed contact surfaces, and the operating element is rotated in a first direction to urge the first driving surface into engagement with the first contact surface; the operating element rotates in a second direction and the second driving surface selectively engages the second contact surface.

In order to solve the above technical problem, another technical solution adopted by the present invention is as follows:

a hand tool having a clamping arrangement as claimed in the preceding claim.

According to the clamping device and the handheld tool with the clamping device, the driving unit fixedly connected with the operating element is arranged to drive the driving unit to rotate around the axial direction, so that the operating assembly is switched between a disengagement mode and a matching mode, in the matching mode, the operating element is rotated clockwise or anticlockwise to realize quick mounting or dismounting of the working head, and the working head can be reliably mounted on the output shaft without using an auxiliary tool; and the operation interface is very simple and is easy to be mastered by an operator. In the disengaged mode, the operating element can be moved into position, preventing the operating element from obstructing the view of the operator during operation, avoiding the occurrence of a hazard.

Drawings

Fig. 1 is a sectional view of a head housing portion of a multi-function machine according to a first embodiment of the present invention, in which a locking member is not yet inserted into a locking member.

Fig. 2 is an exploded perspective view of some components of the multi-function machine shown in fig. 1.

Fig. 3 is a sectional view of a drive disk of the multi-function machine of fig. 1.

Fig. 4 is a sectional view of a locker of the multi-function machine of fig. 1.

Fig. 5 is a cross-sectional view taken along line a-a of fig. 1 with the operating assembly in a disengaged mode.

FIG. 6 is a cross-sectional view taken along line A-A of FIG. 1, wherein the operating assembly is in the engaged mode and the operating member is capable of driving the retaining member to release the head.

FIG. 7 is a cross-sectional view taken along line A-A of FIG. 1, wherein the operating assembly is in a mated mode and the operating member drives the retaining member to lock the working head.

Fig. 8 is a cross-sectional view taken along line a-a of fig. 1, with the operating assembly in a disengaged mode and the operating element being moved into position.

Fig. 9 is a sectional view of a head housing portion of the multi-function machine shown in fig. 1, when the locking member is engaged with the locking member.

Fig. 10 is a sectional view of a head housing portion of a multi-function machine in a second embodiment of the present invention, in which a locking member is not yet inserted into a locking member.

Fig. 11 is a partial perspective view of a driving unit of the multi-function machine shown in fig. 10.

Fig. 12 is a perspective view of the coupling unit and the locker of the multi-function machine of fig. 10.

Figures 13 a-13 i are schematic views of the operating assembly of the multi-function machine of figure 10 switched between an engaged mode and a disengaged mode.

FIG. 14 is a partial perspective view of the multi-function machine of FIG. 10 with the operating components in mated mode.

Fig. 15 is a partial cross-sectional view of a multi-function machine in accordance with a third embodiment of the invention, with the drive member and the attachment member disengaged.

The relevant elements in the figures are numbered correspondingly as follows:

30. multifunctional machine 77, threaded hole 240, clamping unit

32. Housing 78, rod 242, operating assembly

34. Output shaft 80, operating element 256, cavity

36. Working head 82, driving unit 258, flange plate

38. Clamping device 84, connection unit 266, locking element

40. Clamping unit 86, body 268, locking member

41. Axial direction 88 drive 277 threaded hole

42. Operating assembly 90, drive slot 278, rod

44. Motor 92, connecting part 280, operating element

46. Eccentric transmission mechanism 94, drive plate 282, drive unit

48. Eccentric 96, nut 284, connecting unit

50. Shifting fork 98, elastic piece 286, main body

52, 54 rolling bearing 100, containing groove 288, driving element

56. Cavity 102, end wall one 2881, upper side

57. Through hole 104, end wall two 2882, lower side

58. Flange 106, connecting groove 2883, first driving surface

60. Mounting portion 108, connecting member 2884, second drive face

62. Cutting portion 110, sidewall one 2885, first mating surface

64. Connecting part 112, two side walls 2886 and second matching surface

66. Locking member 114, magnet 292, and connecting portion

68. Locking piece 230, multifunctional machine 294, driving disc

70. Cover 232, housing 208, first connector

72. Upper cover 234, output shaft 2081, upper top surface

74. Lower cover 236, working head 2082, lower top surface

76. Pressing plate 238, clamping device 2083 and first abutting surface

2084. Second abutting surface 2105, second sliding surface 380 and operating element

2085. First slip plane 310, connecting piece 382, drive unit

210. Second connecting element 3101, first contact surface 384, connecting unit

2101. Upper surface 3102, second contact surface 388, driver

2102. Lower surface 338, gripping means 3881, first driving surface

2103. First abutting surface 342, operating component 3882 and second driving surface

2104. Second abutting surface 366 locking piece

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The hand-held tool according to the present embodiment is specifically a swing-type hand-held tool, which is also called a multifunction machine. The present invention is not limited to oscillating hand tools and may be rotary abrasive hand tools such as sanders or angle grinders.

Fig. 1 shows a head region of the multifunction machine 30 in this embodiment. The multifunctional machine 30 has a housing 32, an output shaft 34 extending from the inside of the housing 32, a working head 36 mounted on the tip of the output shaft 34, and a clamping device 38 for fixing the working head 36 on the tip of the output shaft 34. The clamping device 38 comprises a clamping unit 40 and an operating assembly 42, wherein the clamping unit 40 is used for clamping the working head 36 in the axial direction 41, and the operating assembly 42 is used for driving the clamping unit 38.

In operation of the multi-function machine 30, the output shaft 34 is in a rotary reciprocating oscillating movement about its own axis X1, generating a large sudden change in torque in both directions of oscillation. Thus, a very high axial clamping force is required to ensure that the working head 36 is retained on the output shaft 34 under all operating conditions without slippage that could affect operating efficiency or be inoperable. The present embodiment provides a multi-function machine 30 that meets the above requirements, provides sufficient clamping force, and quickly clamps and releases the working head 36 without the use of additional auxiliary tools.

The housing 32 is also provided with a motor 44 and an eccentric transmission mechanism 46 for converting the rotation output by the motor shaft into the swinging motion of the output shaft 34. The eccentric transmission mechanism 46 includes an eccentric member 48 mounted on the shaft of the motor and a fork 50 fitted over the output shaft 34, the eccentric member 48 being enclosed between two sliding surfaces of the fork 50. When the eccentric 48 rotates, by cooperating with the fork 50, it converts its rotational movement into an oscillating movement of the output shaft 34 with respect to its own axis X1, with an angle of oscillation between about 0.5 and 7 degrees and with a frequency of oscillation that can be set at about 5000 to 30000 times per minute.

Referring again to fig. 1, the straight line on which the axis X1 of the output shaft 34 is located is defined as the longitudinal direction, the direction perpendicular to the axis X1 is defined as the lateral direction, the bottom of the paper is the lower, and the top of the paper is the upper. The following description uses the definitions set forth herein. The output shaft 34 is hollow and is supported longitudinally within the housing 32 between two rolling

bearings

52, 54. The upper end of the output shaft 34 is accommodated in the shell 32 and is provided with a cavity 56; the lower end is provided with a flange 58 extending out of the housing 32 for mounting the working head 36. The flange 58 is further provided with an axial through hole 57, and the through hole 57 is communicated with the cavity 56.

The working head 36 is a straight saw blade, and it will be readily apparent to those skilled in the art that the working head 36 may also be other accessories, such as a circular saw blade, a sanding disc, a scraper, etc. The working head 36 is transversely disposed and has a flat plate-like mounting portion 60 for mounting on the output shaft 34, a cutting portion 62 for cutting, and a connecting portion 64 between the mounting portion 60 and the cutting portion 62.

The clamping unit 40 comprises a locking member 66 which is pivotable about the axial direction 41, a locking member 68 which cooperates with the locking member 66.

In particular, the locking member 66 is pivotably arranged on the housing 32 about the axis X1, at the upper end of the output shaft 34, and is prevented from moving axially by the output shaft 34. Of course, the retaining member 66 may also be rotatably disposed within the cavity 56 of the output shaft 32, as will be appreciated by those skilled in the art.

In the present embodiment, the housing 32 includes a cover 70 at the top, and the cover 70 includes an upper cover 72 and a lower cover 74 that are connected to each other. The lock member 66 is substantially annular and rotatable in the lower cover 74, and has a screw hole 77 axially formed in the middle thereof.

The locking member 68 extends through the mounting portion 60 and the through bore 57 of the working head 36 and into the cavity 56 of the output shaft 34. The locking member 68 includes a ring-shaped pressing plate 76 at the bottom and a rod portion 78 extending axially upward from the middle of the pressing plate 76, the rod portion 78 being provided with an external thread (not shown) at its distal end, and the rod portion 78 being non-rotatable with respect to the output shaft 34 after passing through the through hole 57. In assembly, the shank 78 of the locking member 68 extends through the cavity 56 of the output shaft 34 and threadedly engages the threaded aperture 77 of the locking member 66 to secure the working head 36 to the flange 58 of the output shaft 34 and to be clamped between the bottom surface of the flange 58 and the top surface of the pressure plate 76.

It should be noted that, in the present embodiment, the locking member 68 is provided with a shaft portion, and the locking member 66 is provided with a threaded hole, but the present invention is not limited to this configuration. It will be readily apparent to those skilled in the art that the shank may be provided on the locking member and the threaded bore on the locking member, again requiring the locking member to be non-rotatable relative to the output shaft. In addition, the thread matching locking can be common single-head thread matching, and can also be double-head or multi-head; the size of the thread teeth is not limited, and the thread teeth can be coarse teeth or fine teeth; the thread profile shape may be one of a triangular thread, a rectangular thread, a trapezoidal thread, a buttress thread.

When the output shaft 34 swings, the working head 36 and the clamping unit 38 are driven to swing together. Some of the components of the operating assembly 42 in this embodiment need to be disposed outside the housing for direct manual operation by the user without the use of additional auxiliary tools. If the clamping unit 38 swings while driving the operating component 42 to swing, the operation feeling of the user is affected, and even there is a safety problem in some situations, so it is necessary to avoid driving the operating component 42 to swing synchronously after the clamping unit 38 locks the working head 36.

In this embodiment, the operating assembly 42 has an engaged mode and a disengaged mode, thereby enabling the operating assembly 42 to be selectively connected to the clamping unit 38 without relative rotation. When it is desired to lock or unlock the locking member 66 and the locking member 68 relative to each other, the operating assembly 42 is selectively placed in the engaged mode, the operating assembly 42 is connected to the clamping unit 38 without relative rotation, and the locking member 66 is then actuated. When operation is desired after locking of locking member 66, operating assembly 42 is optionally in a disengaged mode, and operating assembly 42 can be rotated relative to clamp unit 38 so as not to be affected by swinging of clamp unit 38.

Referring again to fig. 1 and 2, the operating assembly 42 includes an operating element 80 and a drive unit 82. The clamping unit 38 further comprises a connecting unit 84. Wherein the operating element 80 is adapted to be manually operated to move the drive unit 82 such that the drive unit 82 cooperates with the coupling unit 84 to switch the operating assembly 42 between the engaged mode and the disengaged mode.

The drive unit 82 is partially received within the cavity of the upper cover 72 and is positioned above the retaining member 66. The drive unit 82 includes a main body 86 connected to the operating element 80, a drive member 88 provided on the main body 86, and a drive groove 90 (see fig. 3). Wherein the body 86 includes an upper vertical cylindrical connecting portion 92 and a lower disk-like drive disk 94.

The connecting portion 92 is fixedly connected to the operating element 80 by means of a nut 96. Specifically, the connecting portion 92 is provided with external threads that pass through holes in the upper cover 72 and the operating element 80 to connect with the nut 96, thereby fixedly connecting the operating element 80 to the connecting portion 92. Of course, in the present embodiment, the connecting portion 92 is fixedly connected to the operating element 80 by a screw, but the present invention is not limited to the above-mentioned manner, and other implementation means, such as welding, riveting with a pin, etc., can be easily conceived by those skilled in the art. And the operating element 80 and the main body 86 may be integrally formed.

Drive disc 94 is free of relative movement in axial direction 41 with respect to upper cover 72. To facilitate manipulation of operating element 80, operating element 80 may also move drive disc 94 in axial direction 41 relative to upper cover 72. That is, after the coupling portion 92 is screwed with the nut 96, the operating element 80 and the driving unit 82 together can be moved in the axial direction 41 within a preset range with respect to the upper cover 72.

Further, an elastic member 98 is disposed between the driving disc 94 and the upper cover 72, and the elastic member 98 provides an elastic force for the driving disc 94 to move away from the upper cover 72. The elastic member 98 is a compression spring in this embodiment. When the operation element 80 needs to be operated, the operation element 80 is pulled upwards slightly by overcoming the elastic force of the elastic piece 98, so that the operation element 80 has enough movement space; after the locking is completed, the operating element 80 is relatively fixed with respect to the upper cover 72 by the elastic force of the elastic member 98.

Referring to fig. 2 and 3, the drive member 88 is a cylindrical pin, and the cylindrical pin 88 is received in a receiving slot 100 in the drive disk 94. Here, the cylindrical pin 88 may be fixed in the receiving groove 100 or may be integrally formed with the driving disk 94.

A drive slot 90 is provided on the surface of drive disk 94 facing locking member 66, drive slot 90 being a helical slot. The spiral of the spiral groove 90 extends around the O-point with increasing radius (D2> D1). In the present embodiment, point O is the center of drive disc 94, although point O may be located off-center with respect to the center of drive disc 94. Helicoidal groove 90 has an end wall one 102 and an end wall two 104, with end wall one 102 being closer to point O. The angular variation from the first end wall 102 to the second end wall 104 is greater than or equal to 360 degrees, such as 380 degrees, 400 degrees, etc.

Referring to fig. 2 and 4, the coupling unit 84 includes a coupling groove 106 and a coupling member 108 provided on the locker 66. It can be seen that the connection unit 84 can be pivotably arranged about the axial direction 41 (the axis X1). The drive member 88 is movable within the connecting slot 106 and the link member 108 is movable within the drive slot 90. Here, a connecting groove 106 is provided on the end face of the locking element 66 facing the drive disk 94, which connecting groove 106 is an oblong groove. The oblong slot 106 has a first side wall 110 and a second side wall 112. The coupling 108 is likewise arranged on the end face facing the drive disc 94, and is identical in shape and mounting to the drive element 88 and will not be described in detail here. The width of the oblong slot 106 is equal to or slightly greater than the diameter of the driver 88. Accordingly, the width of the helical groove 90 is equal to or slightly greater than the diameter 108 of the connection. Thus, when the drive member 88 moves in the coupling groove 106, the coupling member 108 moves in the drive groove 90, so that the drive unit 82 is supported in translation while rotating about the axial direction 41. In the present embodiment, the drive unit 82 translates in a plane perpendicular to the axial direction 41. That is, during the movement of the operating element 80 driving the drive unit 82 relative to the connecting unit 84, the drive unit moves about a drive axis X2, the drive axis X2 is parallel to the axis X1, and during the movement, the distance of the drive axis X2 from the axis X1 is variable.

The operating element 80 is an operating handle whose end is at a distance from the axis X1 in order to easily engage the connecting unit 92 in translation while the drive unit 82 is driven by the operating element 80 in rotation about the axial direction 41.

How the operating assembly 42 is switched between the disengaged mode and the engaged mode is described in detail below with reference to the drawings.

Referring to fig. 5, 6 and 7, the operating assembly 42 is moved from the disengaged mode to the engaged mode. As shown in FIG. 5, in the disengaged mode, the connector 108 is located approximately midway along the spiral groove 90 and is not in contact with either of the first end wall 102 and the second end wall 104; at the same time, the driver 88 is also located approximately midway in the oblong slot 106. At this point, the operating element 80 and the clamping unit 38 can be rotated relative to one another in two directions E, F. That is, the movement of the operating element 80 does not cause the rotation of the locking member 66 about the axis X1, and is therefore not affected by the swinging of the clamping unit 38.

Whereas, if, in the disengaged mode shown in fig. 5, the operating element 80 is driven in the second direction F. As shown in fig. 6, the operating element 80 simultaneously moves the drive member 88 in the connecting slot 106 and also moves the drive slot 90 relative to the connecting member 108 so that the first end wall 102 engages the connecting member 108 and the drive member 88 also engages the first side wall 110. At this point, the operating assembly 42 is moved from the disengaged mode to the engaged mode. That is, the operating assembly 42 is connected to the clamping unit 38 in a rotationally fixed manner, in which the drive unit 82 and the connecting unit 84 as well as the operating element 80 are relatively fixed, and the operating element 80 is driven further in the second direction F, so that the operating element 80, while rotating counterclockwise about the axis X1, also drives the locking member 66 in rotation about the axis X1, so that the working head 36 is released.

Alternatively, in the disengaged mode shown in fig. 5, the operating element 80 is driven in the first direction E. As shown in fig. 7, the operating element 80 simultaneously moves the driving member 88 in the connecting slot 106 and also moves the driving slot 90 relative to the connecting member 108, so that the second end wall 104 is engaged with the connecting member 108 and the driving member 88 is also tightly engaged with the second side wall 112. At this time, the operating element 42 is also moved from the disengaged mode to the engaged mode. That is, the operating assembly 42 is connected to the clamping unit 38 in a non-rotatable manner, in which the drive unit 82 and the connecting unit 84 as well as the operating element 80 are relatively fixed, and the operating element 80 is driven further in the first direction E, so that the operating element 80, while rotating clockwise about the axis X1, also drives the locking member 66 to rotate about the axis X1, thereby locking the working head 36.

As shown in FIG. 7, the operating assembly 42 is in the engaged mode, and the actuating member 80 is actuated to rotate the locking member 66 clockwise to lock the working head 36. In order to avoid simultaneous pivoting of the operating unit 42 during operation by the locking element 66. The operating assembly 42 therefore needs to be moved from the engaged mode to the disengaged mode. In this engaged mode, the operating element 80 can thus be driven in the second direction F, as shown in fig. 8, and the operating element 80, while moving in the second direction F, urges the second end wall 104 out of engagement with the connector 108. At this point, the operating assembly 42 is moved from the engaged mode to the disengaged mode. That is, the operating assembly 42 can be rotated relative to the clamping unit 38, in which mode the operating element 80 brings about a simultaneous translational movement of the drive unit 82, which is rotatable about the axial direction 41. Thus, the operating element 80 can be freely driven to move to the proper position without causing the locking member 66 to rotate.

Of course, as shown in fig. 8, continued actuation of the operating member 80 in the second direction F causes the first end wall 102 to engage the connector 108, which in turn causes the operating assembly 42 to move from the disengaged mode to the engaged mode. It can be seen that actuating the operating element 80 in one direction moves the operating assembly 42 from the engaged mode to the disengaged mode and then to the engaged mode. However, in practice, usually, if the working head needs to be locked, the operating element 80 is operated along the first direction E to move the operating assembly 42 from the disengagement mode to the engagement mode, and the operating element 80 can drive the locking member to lock the working head. After locking, the operating element 80 is actuated in the second direction F to move the operating assembly 42 from the engaged mode to the disengaged mode, and only the operating element 80 is moved to the proper position and secured without moving the locking member together. If the multifunctional machine 30 is operated, the locking member does not swing the operating member 80 when it swings. When the working head needs to be released, the operating element is driven along the second direction F, so that the operating assembly 42 moves from the disengagement mode to the engagement mode, and the operating element 80 can drive the locking member to release the working head.

Referring again to fig. 1, the operating element 80 is bonded to the upper cover 72, and a magnet 114 is provided. The upper cover 72 is provided with a magnet (not shown) that attracts the magnet 114. Thus, after the working head 36 is mounted on the output shaft 34, the operating element 80 is driven to be in the disengagement mode, the operating element 80 is driven freely, and when the magnet 114 is attracted to the magnet, the operating element 80 is moved to the proper position. Thus, the operating element 80 can be fixed relative to the housing 32 during operation of the multi-function machine without affecting the operator's view and avoiding danger. Of course, the fixing manner of the operation element 80 relative to the housing 32 is not limited to the above-mentioned manner, and other implementation manners, such as providing a snap on the housing 32 to cooperate with the operation element 80, etc., can be easily conceived by those skilled in the art, as long as the operation element 80 is prevented from moving relative to the housing 32 when the multifunctional machine 30 is operated.

Note that, in this embodiment, the driving groove is provided as a spiral groove, and the connecting groove is provided as an elliptical groove; and both the drive member and the coupling member are arranged as cylindrical pins to enable the drive unit to be supported for simultaneous translational movement while being rotatable about the axial direction 41, i.e. to enable the operating assembly to be switched between an engaged mode and a disengaged mode. The spiral groove comprises a first end wall and a second end wall, the connecting groove comprises a first side wall and a second side wall, the connecting piece is matched with the first end wall or the second end wall, the driving piece is matched with the first side wall or the first side wall, and the operating assembly is in a matching mode; disengagement of the connector from both the first and second end walls engages the operating assembly in the disengaged mode. The invention is not limited to the above-described manner and other means of realisation will be readily apparent to a person skilled in the art, as long as the switching of the operating assembly between the engaged and disengaged modes can be realised.

For example, the helical groove on the drive slot is interchanged with the elliptical groove of the connecting slot. Or the shape of the elliptic groove is changed, such as a straight groove, or the end wall is not semicircular, or at least one side of the first side wall and the second side wall is provided with a shape matched with the shape of the connecting piece. Or the driving groove and the connecting groove are both spiral grooves, and the spiral line of the spiral grooves can be gradually increased and extended around the radius of the point O instead of the radius of the point O. And if both are helical grooves, the driving member or the connecting member is respectively matched with two end walls of the two helical grooves, and the operation assembly is in a matching mode. Of course, the present invention is not limited to the spiral groove, and only needs to be capable of performing translational motion while rotating around the axial direction 41. The rotational angle of the driving unit 82 with respect to the clamping unit 40 is greater than or equal to 360 degrees, so that the rotational angle of the operating element 80 in the circumferential direction is greater than or equal to 360 degrees, which facilitates the return of the operating element 80 to a proper position. Of course, the rotation angle of the operating element 80 in the circumferential direction can also be less than 360 degrees.

The driving member and the connecting member may be other than cylindrical pins, and the cross section may be square, triangular or other shapes as long as they do not hinder the movement thereof in the driving groove or the connecting groove. The free end of the cylindrical pin 88 may be a conical end, a spherical end, or the like, to facilitate its movement.

Of course, the driving disk can also be provided with a first driving part and a second driving part; the connection unit includes a first connection slot in which the first driving member is movable and a second connection slot in which the second driving member is movable.

Similarly, the driving disk can be provided with a first driving groove and a second driving groove; the connecting unit includes a first connecting member movable in the first driving groove and a second connecting member movable in the second driving groove.

The first and second driving members or the first and second connecting members may be specifically provided as the driving members and the connecting members described above. The first driving groove and the second driving groove or the first connecting groove and the second connecting groove may be disposed as described above.

The specific operation process is described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, the working head 36 is first mounted between the flange 58 of the output shaft 34 and the locking member 68. if the opening (not shown) in the mounting portion 60 of the working head 36 is closed, the locking member 66 and the locking member 68 need to be completely separated to be removed from the output shaft 34. the locking member 68 is then inserted through the opening in the working head 36 and then mounted into the output shaft 34. It is to be noted here that the opening of the working head is not closed, leaving a gap through which the shank of the locking element can pass. In this case, the locking member does not need to be completely removed from the locking member, and the locking member is loosened to leave a gap between the locking member and the receiving portion of the output shaft through which the mounting portion of the working head can pass.

After the locking member 68 is inserted into the cavity 56 of the output shaft 34, the top external threads of the shank 78 thereof contact the threaded bore 77 of the locking member 66. At this time, the operating element 80 is slightly pulled upward against the elastic force of the elastic member 98, and the operating element 80 is further driven, so that the operating assembly 42 is moved from the disengagement mode to the engagement mode. Referring to fig. 7, driving the operating element 80 in the first direction E moves the driving member 88 in the connecting slot 106 and simultaneously moves the driving slot 90 relative to the connecting member 108, so that the second end wall 104 is engaged with the connecting member 108 and the driving member 88 is also engaged with the second side wall 112. Operating element 42 is also moved from the disengaged mode to the engaged mode. In this mode, the driving unit 82 and the connecting unit 84 and the operating element 80 are relatively fixed, and the operating element 80 is driven further in the first direction E, so that the locking member 66 is rotated about the axis X1 relative to the locking member 68 by the cooperation of the driving unit 82 and the connecting unit 84. Because the threaded bore 77 of the locking member 66 is threadedly engaged with the shank of the locking member 68, the locking member 68 is axially moved upwardly while being rotated by the screwing force, eliminating axial clearance between the working head 36 and the locking member 68 and the flange 58 of the output shaft 34. As shown in fig. 9, the operation member 80 is rotated until the operation member 80 is hard to rotate, and the three of the working head 36, the locking member 68 and the flange 58 of the output shaft 34 have a very large axial positive pressure and a correspondingly large friction force, respectively, so that sufficient torque can be transmitted to prevent the working head from sliding relative to the locking member 68 and the flange 58 of the output shaft 34, thereby affecting the working efficiency.

After locking member 66 is fully locked with locking member 68, see fig. 8. The operating assembly 80 is actuated in the second direction F to urge the second end wall 104 out of engagement with the connector 108. At this point, the operating assembly 42 is moved from the engaged mode to the disengaged mode. In this mode, the operating element 80 brings about a simultaneous translational movement of the drive unit 82, which is rotatable about the axial direction 41. Thus, the operating element 80 can be driven to move to a position where the magnet 114 is absorbed by the magnet provided on the upper cover 72, thereby preventing the locking member 66 from driving the operating assembly 42 to swing together.

From the above description of the operation steps for mounting the working head 36, it can be easily understood that the reverse operation is performed when the working head 36 is removed. When it is desired to remove the working head 36, the operating member 80 is simply driven counterclockwise to move the operating assembly 42 from the disengaged mode to the engaged mode.

Referring specifically to fig. 6, driving the operating element 80 in the second direction F moves the driving member 88 in the connecting slot 106 while the connecting member 108 moves relative to the driving slot 90, so that the first end wall 102 is engaged with the connecting member 108, and the driving member 88 is also engaged with the first side wall 110. At this point, the operating assembly 42 is also moved from the disengaged mode to the engaged mode. In this mode, the drive unit 82 and the coupling unit 84 and the operating element 80 are relatively fixed, the operating element 80 being driven counter-clockwise, the locking member 68 being moved axially downwards by a distance by the drive unit 82 rotating the locking member 66 about the axis X1 relative to the locking member 68 to release the threaded connection; finally, the operating element 80 is rotated further until the locking member 66 is completely unthreaded from the locking member 68, at which point the locking member 68 can be removed from the output shaft 34 and the working head 36 removed.

As described above, the multi-function machine 30 of the present invention can be used to quickly drive the locking member 66 to rotate relative to the locking member 68 in both directions by using the operating assembly 42 mounted on the housing 32 without using any additional tools, by simply driving the operating assembly 42 in either a clockwise or counterclockwise direction, to quickly mount or dismount the working head 36. The operation interface is very simple and is easy to be mastered by an operator. In addition, the operating assembly 42 is operated to rotate for a plurality of turns to drive the locking member 66 and the locking member 68 to be locked in a threaded manner, so that the axial positive pressure applied to the working head 36 can be ensured to be large enough, the working head 36 can be stably and reliably mounted on the output shaft 34, the working head 36 is prevented from slipping under any working environment, and the working efficiency of the working head 36 is improved.

In addition, the operating assembly 42 is switchable between the engaged mode and the disengaged mode by further providing a drive unit 82 and a connection unit 84. When the working head 36 is locked, the operating assembly 42 is driven to move from the engaging mode to the disengaging mode, so that the locking member 66 is prevented from driving the operating assembly 42 to move, friction and vibration between the operating assembly 42 and the locking member 66 are reduced, and the whole tool has better operating hand feeling. Moreover, the operating element 80 is arranged at one end of the output shaft 34 far away from the flange plate 58, so that the operating element 80 is far away from the working head 36, and the operating element 80 cannot touch the working head 36 when being operated, thereby preventing an operator from being accidentally injured.

In the above embodiment, the operation unit 42 of the multifunction machine 30 is rotated in the engagement mode in an angular range of 90 degrees or more, and preferably in a rotational angle range of 360 degrees or more and 1080 degrees or less. It should be noted that the hand-held tool of the present invention is operated by the operating assembly to rotate the locking member relative to the locking member and finally locked by the screw. It will be readily understood by those skilled in the art that the operating assembly can be rotated several turns until the locking member locks with the locking member.

The operating assembly of the hand tool of the present invention is mainly used for operatively driving the locking member and the locking member to rotate with each other and to be locked by the screw, and the specific implementation of the operating assembly and the connecting unit is not limited to the specific implementation in the first embodiment described above. Further implementations of the operating assembly and the connecting unit will be specifically described below by the following description of the second and third embodiments.

Detailed description of the invention

As shown in fig. 10 to 14, the second embodiment of the present invention discloses an oscillating hand tool, i.e., a multi-function machine 230, the multi-function machine 230 including a housing 232, an output shaft 234 installed in the housing 232, and a clamping device 238 fixing a working head 236 at an end of the output shaft 234. The clamping device 238 includes a clamping unit 240 and an operating assembly 242. Wherein the clamping unit 240 is used for clamping the working head 236 in the axial direction 41, and comprises a locking member 268 inserted into the output shaft 234, and a locking member 266 received in the housing 232 and used for locking the locking member 268. The operating assembly 242 is used to drive the clamping unit 238, and in particular, the locking member 266, about the axis X3 of the output shaft 234.

The operating assembly 242 includes an operating element 280 and a drive unit 282. The clamping unit 238 further comprises a connection unit 284. The operating element 280 is used for manual operation to move the driving unit 282, so that the driving unit 282 and the connecting unit 284 are mutually matched to switch the operating assembly 242 between a matching mode and a disconnecting mode.

Wherein the operating element 280 is identical to the operating element 80 of the first embodiment. The driving unit 282 and the connecting unit 284 have different structures compared to the multifunction machine 30 in the first embodiment.

As shown in fig. 11, the driving unit 282 includes a main body 286 connected to the operating element 280, and a driving member 288 provided on the main body 286. Wherein the main body 286 includes an upper vertical cylindrical connecting portion 292 and a lower disk-like drive disk 294. The connection portion 292 and the operation element 280 are connected in the same manner as the first embodiment, and are not described herein again. In contrast to the first embodiment, the operating element 280 can drive the drive disc 294 to rotate about the axis X3. The driving element 288 is disposed on the inner side of the driving disk 294 and includes an upper side 2881 and a lower side 2882 disposed in parallel, a first driving surface 2883 and a second driving surface 2884 disposed in parallel, and a first mating surface 2885 and a second mating surface 2886 disposed in parallel. Wherein the upper surface 2881, the first driving surface 2883, the first mating surface 2885, the lower surface 2882, the first driving surface 2884 and the first mating surface 2886 are connected in sequence. The first driving surface 2883 is inclined relative to the upper side 2881; the first mating surface 2885 is perpendicular to the upper side 2881 and the lower side 2882.

As shown in fig. 12, the connection unit 284 includes a first connection member 208 and a second connection member 210, and preferably, the first connection member 208 and the second connection member 210 are arranged to be offset in the axial direction 41. The staggered arrangement here means an arrangement staggered in both the axial direction 41 (longitudinal direction) and the transverse direction.

The first and

second connectors

208, 210 are arranged on the outer side of the locking member 266 in the axial direction 41. Specifically, the first connecting member 208 includes an upper top surface 2081 and a lower top surface 2082 arranged in parallel, a first abutting surface 2083 and a second abutting surface 2084 arranged at an angle, and a first sliding surface 2085. The corresponding second connector 210 also comprises an upper surface 2101 and a lower surface 2102 arranged in parallel, a first 2103 and a second 2104 abutment surface arranged at an angle, a second 2105 sliding surface. Wherein the upper top surface 2081 of the first connector 208 is disposed parallel to the lower surface 2102 of the second connector 210. The first and second abutting

surfaces

2083 and 2084 arranged at an angle are arranged facing the first and second abutting

surfaces

2103 and 2104 arranged at an angle.

The driving member 288 is selectively engageable with the first connector 208 or the second connector 210, i.e., the driving member 28 is selectively engageable with either of the first connector 208 and the second connector 210, the operating assembly 242 is in the engaged mode, the operating assembly 242 is connected to the clamping unit 238 in a non-rotatable manner, and the locking member 266 is driven to rotate. And the driving member 288 is disengaged from the first connecting member 208 or the second connecting member 210, i.e. the driving member 288 is not engaged with either of the first connecting member 208 and the second connecting member 210, the operating assembly 242 is in the disengaged mode, and the operating assembly 242 can rotate relative to the clamping unit 238, so as not to be influenced by the swing of the clamping unit 238.

Specifically, referring to fig. 13 a-13 d, the operating assembly 242 is moved from the disengaged mode to the engaged mode. In the disengaged mode, as shown in fig. 13a, the driving member 288 is not engaged with either of the first and

second connectors

208, 210, and the operating element 280 and the clamping unit 238 can be rotated relative to each other in both directions. That is, the movement of the operating element 280 does not cause the locking member 266 to rotate about the axis X3, and is therefore not affected by the swinging of the clamping unit 238.

If, in the disengaged mode shown in fig. 13a, the rotary operating member 280 is moved in the first direction E to fig. 13 b; in continuing to rotate the operating element 280 in the first direction E, as shown in fig. 13c, the first driving surface 2883 of the driving member 288 contacts the second sliding surface 2105 of the second link 210 and slides along the second sliding surface 2105. At this time, the driver 288 translates in the axial direction 41 while rotating about the axial direction 41. Continuing to rotate the operating element 280 in the first direction E until the first drive surface 2883 of the drive member 288 contacts the second abutment surface 2084 of the first connector 208; the first mating surface 2885 of the driving member 288 is in contact with the first abutting surface 2083 of the first connector 208. Referring to fig. 13d and 14, when the driving member 288 is engaged with the first connecting member 208, the operating assembly 242 is moved to the engaged mode. That is, the operating assembly 242 is coupled to the clamping unit 238 for non-rotation, and in this mode, the driving unit 282, the coupling unit 284 and the operating element 280 are relatively fixed, and further rotation of the operating element 280 in the first direction E drives the retaining member 266 to rotate about the axis X3 to retain the working head 236.

In the tightening process, the first abutting surface 2083 and the second abutting surface 2084 are disposed at an angle, so as to be respectively in close contact with the first mating surface 2885 and the first driving surface 2883, which facilitates the operation element 280 to drive the locking member 266 to rotate around the axis X3. Instead, to prevent sliding in the axial direction 41, see also fig. 13d, the upper side 2881 of the drive member 288 is blocked by the lower bottom 2102 of the second coupling member 210. The included angle a between the first abutting surface 2083 and the second abutting surface 2084 is the same as the included angle B between the first driving surface 2883 and the first mating surface 2885, and may be an obtuse angle or an acute angle. Of course, if the angles are different, the included angle a may be larger than the included angle B, as long as the first abutting surface 2083 and the second abutting surface 2084 can block the first mating surface 2885 and the first driving surface 2883.

Of course, if only the first abutment surface is provided to engage the first engagement surface on the driving member, the engagement mode can also be achieved and the locking member 266 can be rotated about the axis X3 by the operating member 280. Also the first abutment surface may extend parallel to the axial direction 41 or be inclined at an angle with respect to the axial direction 41.

After locking, the operating assembly 280 can be rotated in the second direction F, as can be seen in fig. 13d, to disengage the driving member 288 from the first connector 208. At this point, the operating assembly 242 is moved into a disengagement mode, see fig. 13e, in which the operating element 280 carries the drive unit 282 in rotation about the axial direction 41, but does not carry the locking member 266 in rotation. Thus, the operating member 280 is moved into position and secured, thereby preventing the locking member 266 from swinging along with the operating assembly 242.

If it is desired to remove the working head 236, as shown in fig. 13e to 13i, the operating assembly 242 is moved from the disengaged mode to the engaged mode. Rotating the operating element 280 in the second direction F causes the driving member 288 to continue rotating about the axial direction 41. During the rotation, as shown in fig. 13f, the second driving surface 2884 of the driving member 288 contacts with the first sliding surface 2085 of the first connecting member 208 and slides along the first sliding surface 2085, and at this time, the driving member 288 translates along the axial direction 41 while rotating around the axial direction 41. Continuing to rotate the operating element 280 in the second direction F, referring to fig. 13g and 13h, the lower bottom surface 2882 of the driving member 288 contacts the upper top surface 2081 of the first connector 208 and slides along the upper top surface 2081. Until the second drive surface 2886 of the driver 288 is in contact with the second abutment surface 2104 of the second connector 210; the second mating surface 2884 of the driving member 288 is in contact with the first abutment surface 2103 of the second connector 210. The operating assembly 242 is in the engaged mode, in which the driving member 288 is engaged with the second coupling member 210, and in which the driving unit 282 and the coupling unit 284 as well as the operating member 280 are relatively fixed, and the operating member 280 is rotated in the second direction F, and the locking member 266 is rotated about the axis X3 by the driving unit 282 relative to the locking member 268 to release the threaded connection, and the locking member 268 is moved axially downward by a certain distance; finally, the operating member 280 continues to rotate until the locking member 266 is fully unthreaded from the locking member 268, at which point the locking member 268 can be removed from the output shaft 234 and the working head 236 removed.

In the unscrewing process, since the first abutting surface 2103 and the second abutting surface 2104 are disposed at an angle, they can respectively contact the second driving surface 2884 and the second mating surface 2886, so that the operating element 280 can drive the locking member 266 to rotate around the axis X1. Instead, to prevent sliding in the axial direction 41, the lower side 2882 of the first abutment surface drive member 288 is blocked by the upper top surface 2081 of the first connector 208.

The included angle C between the first abutting surface 2103 and the second abutting surface 2104 is the same as the included angle D between the second driving surface 2884 and the second mating surface 2886, and may be an obtuse angle or an acute angle. Of course, if the angle is different, the included angle C is larger than the included angle D, as long as the first abutting surface 2103 and the second abutting surface 2104 can block the second driving surface 2884 and the second mating surface 2886.

Of course, if only the first abutment surface is provided to engage with the second engagement surface on the driving member, the engagement mode can also be achieved, and the locking member 266 can be rotated about the axis X3 by the operation element 280. The first contact surface may extend parallel to the axial direction 41 or may be inclined at a predetermined angle with respect to the axial direction 41.

The angle a between the first and

second abutment surfaces

2083 and 2084 and the angle C between the first and

second abutment surfaces

2103 and 2104 may also be the same.

It is noted that in this embodiment, the driving unit is supported for rotation in the axial direction 41 and for translation in the axial direction, i.e. the operating assembly is switched between the engaged mode and the disengaged mode, by providing for selective engagement or disengagement of the driving member with the first coupling member and the second coupling member. The driving piece can be selectively matched with the first connecting piece or the second connecting piece, and the operation assembly is in a matching mode; the drive member is disengaged from both the first and second connectors and the operating assembly is in the disengaged mode. The invention is not limited to the above-described manner and other means of realisation will be readily apparent to a person skilled in the art, as long as the switching of the operating assembly between the engaged and disengaged modes can be realised.

For example, the driving member and the first connecting member or the second connecting member are not driven to rotate by surface-to-surface contact, and may be provided with pins, steel balls, etc.

In another example, the drive unit comprises two drive members arranged offset in the axial direction, and the connection unit comprises a connection member which is selectively engageable with and disengageable from the two drive members to switch the operating assembly between the engaged mode and the disengaged mode. The connecting piece is matched with one of the two driving pieces, and the operation assembly is in a matching mode; the drive member is disengaged from both drive members and the operating assembly is in the disengaged mode.

The first and second abutting

surfaces

2103 and 2104 arranged at an angle. The operating element 280 may be rotated over 360 degrees in the circumferential direction, which may facilitate the return of the operating element 80 to the proper position. Of course, the first abutting surface 2083 and the second abutting surface 2084 may be disposed opposite to the first abutting surface 2103 and the second abutting surface 2104 disposed at an angle, or the first connector and the second connector may be disposed on the same straight line in the axial direction, and the inventive concept may also be implemented.

Moreover, it will be readily apparent to those skilled in the art that the simultaneous translation while rotating about the axial direction 41 may also be simultaneous translation in both the axial direction and in a plane perpendicular to the axial direction.

As described above, the multifunctional machine 230 of the present invention can quickly drive the locking member 266 to rotate in two directions relative to the locking member 268 by using the operating assembly 242 mounted on the housing 232 without using any additional tools by driving the operating assembly 42 in two different directions about the axial direction 41 to quickly mount or dismount the working head 236. The operation interface is very simple and is easy to be mastered by an operator.

The specific operation process of the embodiment is briefly described below with reference to the drawings.

As shown in fig. 10, the working head 236 is first mounted between the flange 258 of the output shaft 234 and the locking member 268. After the locking member 268 is inserted into the cavity 256 of the output shaft 234, the top external threads of the shank 278 contact the threaded aperture 277 of the locking member 266. At this point, the operating element 280 is driven in the first direction E such that the operating assembly 242 moves from the disengaged mode to the engaged mode. Referring specifically to fig. 13a to 13c, the operating element 280 is rotated in the first direction E until the first driving surface 2883 of the driving member 288 contacts the second abutting surface 2084 of the first connecting member 208; the first mating surface 2885 of the driving member 288 is in contact with the first abutting surface 2083 of the first connector 208. At this time, the driving member 288 is engaged with the first connecting member 208, and the operating assembly 242 is moved to the engaged mode. In this mode, the driving unit 282, the connecting unit 284 and the operating element 280 are relatively fixed, and the locking member 266 is driven to rotate about the axis X3 by further rotating the operating element 280 in the first direction E, thereby locking the working head 36.

After locking member 266 and locking member 268 are fully locked, see FIG. 13 d. Rotating the operating assembly 280 in the second direction F causes the driving member 288 to disengage from the first connector 208. At this point, the operating assembly 242 moves to the disengaged mode. In this mode, the operating element 280 rotates the drive unit 282 about the axial direction 41, but does not rotate the locking element 266. Thus, the operating member 280 is moved into position and secured, thereby preventing the locking member 266 from swinging along with the operating assembly 242.

From the above description of the operation steps for mounting the working head 236, it can be easily understood that the reverse operation is performed when the working head 236 is dismounted. When it is desired to remove the working head 236, the operating element 280 is simply driven in the second direction F to move the operating assembly 242 from the disengaged mode to the engaged mode.

Referring specifically to fig. 10, actuating the operating member 280 in the second direction F moves the operating assembly 242 from the disengaged mode to the engaged mode. As can be seen in particular in fig. 13d to 13h, the operating element 280 is rotated in the second direction F until the second driving surface 2886 of the driving member 288 is in contact with the second abutment surface 2104 of the second connecting member 210; the second mating surface 2884 of the driving member 288 is in contact with the first abutment surface 2103 of the second connector 210. Referring to fig. 13g, at this point, the driving member 288 is engaged with the second connector 208 and the operating assembly 242 is moved to the engaged mode. In this mode, the driving unit 282 and the connecting unit 284 are relatively fixed, and the operating element 280 is rotated in the second direction F, so that the locking member 268 is moved axially downward by the driving unit 282 to rotate the locking member 266 relative to the locking member 268 about the axis X3 to release the threaded connection; finally, the operating member 280 continues to rotate until the locking member 266 is fully unthreaded from the locking member 268, at which point the locking member 268 can be removed from the output shaft 234 and the working head 236 removed.

Detailed description of the invention

The third embodiment of the present invention will be briefly described with reference to fig. 15. The third embodiment is identical to the second embodiment in most of its structures, and the specific structure of the clamping device 338 is different. In this embodiment, the driving unit 382 is a driving member 388 fixedly connected to the operating element 380. The drive member 388 includes oppositely disposed first and second drive surfaces 3881, 3882. Of course, the drive element 388 can also be formed integrally with the actuating element 380. The connection unit 384 includes a connection member 310 provided on the locking member 366. In this embodiment, the connecting member 310 is a protrusion, and the protrusion 310 includes a first contact surface 3101 and a second contact surface 3102 which are oppositely disposed. When the driving member 388 is engaged with the connecting member 310, the operation assembly 342 is in an engaging mode; the driver 388 is disengaged from the connector 310 and the operating assembly 342 is in the disengaged mode.

In particular, the driver 388 is rotated together when the operating element 380 is rotated in the first direction E about the output shaft axis X4. Until the first driving surface 3881 contacts the first contact surface 3101, the operating unit 342 is in the engaged mode. In this mode, continued rotation in the first direction E drives the locking member 366 to rotate about the axis X4, thereby locking the work head.

After locking, rotation in the second direction F may cause the driving member 388 to disengage from the connecting member 310, thereby placing the operating assembly 342 in a disengaged mode. In this mode, the actuating element 380 rotates the actuating element 388 about the axis X4, but does not rotate the locking element 366. Thus, the operating element 380 is moved into position and secured, thereby preventing the locking member 366 from swinging along with the operating assembly 342.

When the working head needs to be disassembled, the operating element 280 is driven along the second direction F to drive the driving member 388 to rotate together. Until the second driving surface 3882 contacts the second contact surface 3102, the operating assembly 342 is in the mating mode. In this mode, continued rotation in the second direction F drives the lock 366 to rotate about the axis X4 to remove the work head.

Claims

1. A clamping arrangement for a hand-held tool, comprising:

a clamping unit for fixing the working head in the axial direction; the clamping unit comprises a connecting unit, and the connecting unit comprises a connecting piece and a connecting groove;

the method is characterized in that: the operating assembly further comprises a driving unit fixedly arranged with the operating element, the driving unit comprises a driving piece and a driving groove, the driving piece movably extends into the connecting groove, the connecting piece movably extends into the driving groove, and the driving piece and the connecting piece are cylindrical pins; the operating element is operable to drive the driving unit to rotate around the axial direction, so that the operating assembly is switched between a matching mode and a releasing mode, in the matching mode, the connecting piece is abutted against the groove wall of the driving groove, and the operating element is connected with the clamping unit in a non-relative rotation mode; the operating element can drive the clamping unit to rotate through the driving piece, and the clamping unit can fix or loosen the working head; in the disengagement mode, the connecting piece is disengaged from the groove wall of the driving groove so that the operating element and the clamping unit can rotate relatively; thereby preventing the operating element from moving when the working head drives the clamping unit to move.

2. The clamping device of claim 1, wherein: at least one of the drive groove and the connection groove is a spiral groove, and the drive unit is supported in translation while being rotatable about an axial direction.

3. The clamping device of claim 1, wherein: the driving unit rotates by an angle greater than or equal to 360 degrees relative to the clamping unit.

4. A hand tool having a clamping device as claimed in any one of claims 1 to 3.