CN2860689Y - Handle Tool Clamping Structure - Google Patents

Abstract

A shank-like tool holding structure comprising: the machine body is provided with gear teeth, ratchets and a guide groove; the plurality of clamping pieces are arranged in the machine body guide groove, and one end of each clamping piece is provided with an incomplete thread; an inner gear ring; a control jacket, on which are arranged: a plurality of control keys and a plurality of driving keys; a transmission member having thereon: the inner taper thread surface is in threaded engagement with the clamping piece, and a plurality of small gears are arranged on the inner taper thread surface through small shafts and are engaged with the inner gear ring and the gear teeth on the machine body; a plurality of resilient anti-loosening elements having claws thereon. When the outer sleeve is rotated, the driving key pushes the inner gear ring to rotate, the pinion meshed with the inner gear ring drives the transmission piece to rotate around the machine body, and larger force can be generated to drive the clamping piece to clamp the tool handle through the gear transmission and the thread transmission of the transmission piece and the clamping piece. At the same time, the control key enables the claw of the elastic anti-loosening element to be meshed with the ratchet on the machine body so as to prevent the tool handle from being loosened under the impact working condition.

Description

Handle Tool Clamping Structure

technical field

The utility model relates to a clamping device for a handle tool, in particular to a clamping structure for a handle tool which is forced to clamp and prevent loosening.

Background technique

The existing clamping structure of handle tools is generally composed of a body, a clamping piece, a nut, a bearing, an anti-loosening device and a jacket. Evenly distributed in the guide groove, there are threads on the clamping part and form a thread transmission with the nut. When the sleeve connected with the nut is rotated, the clamping part can move relative to the body along the guide groove, thereby clamping or loosening the tool handle, preventing loosening The device prevents the tool shank from falling out of the holder when the tool is subjected to load and vibration.

Due to the above structure, the thread between the clamping part and the nut produces a large contact stress under the working load, so that the relative sliding friction is very large, so the clamping tool produced by the thread transmission between the nut and the clamping part The clamping force of the shank is not easy to be large enough, which makes it difficult for the clamping part to clamp the tool shank firmly under the conditions of heavy load and vibration. In addition, several anti-loosening structures that have been disclosed have poor anti-loosening effects due to structural limitations, such as pct/cn02/00375, whose structure has the hidden danger of loosening under vibration and impact conditions.

Utility model content

The purpose of the utility model is to provide a handle tool clamping structure, which can clamp the tool handle with greater force. It rotates the control jacket by hand, drives the driving key of the control ring to push the inner ring gear to rotate, and through the transmission of the ring gear, the upper pinion gear of the transmission part and the upper middle gear of the body, it can generate a greater rotational torque when there is resistance. When the transmission part rotates relative to the machine body, that is, the thread of the nut and the clamping part rotates relative to each other and pushes the clamping part to move along the guide groove of the machine body, the tool handle can be clamped with greater force.

Another purpose of the present utility model is to provide a handle tool clamping structure, which can prompt to start the force clamping process. In the process of clamping the tool handle, when the clamping part is subjected to the reaction force of the tool handle, the claw part of the anti-loosening part engages with the ratchet, and when the force is turned to make the clamping part clamp the tool handle, the claw part The relative ratchet moves elastically and makes a "click" and "click" sound, indicating that it has entered the process of force clamping.

The purpose of the utility model is also to provide a handle tool clamping structure, which can ensure that the tool handle will not be loosened from the clamping part under the working state of vibration and impact. When the clamping part clamps the tool handle and is in the working state of vibration and shock, because the claw part of the anti-loosening part is engaged with the ratchet, it has the function of preventing reverse rotation. The reverse rotation of the nut relative to the clamping piece is prevented, so that the tool shank will not be loosened from the clamping piece under the condition of vibrating and shocking work.

The utility model is realized by the following technical solutions.

According to the handle tool clamping structure proposed by the utility model, it is mainly installed on the drive mandrel driven by the power source, and the drive mandrel drives it to rotate in the forward and reverse directions. The clamping structure includes: a body whose rear end is connected to the drive spindle, and several clamping parts connected to the body, and is characterized in that: the front end of the body forms an accommodating space for clamping tool handles, and in the accommodating space Inside, a counterbore whose length is longer than the screw head length of the screw connecting the body to the drive mandrel, a number of guide grooves evenly distributed on the conical surface coaxial with the body, and a load-bearing protrusion forming an acute angle with the vertical plane of the body axis platform, several coupling grooves at the rear of the body, the middle gear integrated with the body, and the screw hole or taper hole connected with the drive spindle at the rear; the clamping part is assembled in the guide groove of the body, There is an incomplete screw at one end, and the other end is approximately polygonal for clamping the tool handle; there is also an inner ring gear, which is installed coaxially with the body, and there are: inner gear teeth, several rotating shafts on it A half hole, several accommodation spaces for anti-loosening parts, several driving key movement spaces and positioning pits; a transmission part, which is a rotary composite structure, is provided with: a force transmission end surface at an acute angle to the vertical plane of its axis, The inner cone screw, several small shafts whose axis is parallel to the thread surface axis, several small gears installed on the small shaft and respectively meshed with the inner ring gear and the middle gear on the body; half of the bracket bearing, placed Between the load-bearing platform of the body and the force-transmitting end face of the transmission part, there is a bracket and several rolling elements on it. The bracket is in the shape of an open hollow truncated cone. The corresponding angles are equal, the radius of the inscribed circle in the non-working direction of the rolling body, that is, the radial direction, is greater than the inner radius of the bracket; an axial positioning ring locates the transmission part on the body; several elastic anti-loosening parts are installed on the inner ring gear The anti-loosening part is contained in the space and can swing around the semi-hole of the rotating shaft. It is equipped with: the rotating shaft part, the mandrel, the claw part, the protrusion part and the supporting part. The rotating shaft part and the mandrel are the swing center of the anti-loosening part , the claw is engaged with the ratchet in the working state to prevent the transmission part from rotating in reverse relative to the clamping part; a control jacket, which is provided with: stripes on the outer surface for easy grip, several control keys, and several coupling keys , several driving keys, and there are protrusions on the sides of the driving keys. The control keys control the engagement of the claws of the elastic anti-loosening parts with the ratchet by pressing the protrusions of the elastic anti-loosening parts. The driving keys are used to drive the inner ring gear Rotation; a retaining ring, installed between the elastic anti-loosening part and the pinion of the transmission part; a ratchet, fixedly installed on the connecting teeth of the body, on which there are ratchets and a retaining ring, and the retaining ring will control the casing It is axially positioned on the body; a front cover is set on the front of the body and the outer cover, and a coupling groove is provided on it, and the coupling groove is connected with the connecting key of the control outer cover; a rear cover is assembled on the tail of the body, on which There are holes connected to the tail of the body and several coupling keys; several anti-friction components are installed between the body and the control jacket, or between the transmission part and the control jacket, and are made of materials with a small friction coefficient (for example: polytetrafluoroethylene) or graphite) and frames or by rolling elements and cages.

The purpose of this utility model can further be realized like this. According to the handle tool clamping structure proposed by the utility model, it is mainly installed on the drive mandrel driven by the power source, and the drive mandrel drives it to rotate in the forward and reverse directions. The clamping structure includes: a body whose rear end is connected to the drive spindle, and several clamping parts connected to the body, and is characterized in that: the front end of the body forms an accommodating space for clamping tool handles, and in the accommodating space Inside, a counterbore whose length is longer than the screw head length of the screw connecting the body to the drive mandrel, a number of guide grooves evenly distributed on the conical surface coaxial with the body, and a load-bearing protrusion forming an acute angle with the vertical plane of the body axis Platform, several connecting grooves at the rear of the body, an annular groove at the front of the body, a middle gear integrated with the body, and a screw hole or taper hole connected with the drive spindle at the rear; the clip The holder is assembled in the guide groove of the body, one end has an incomplete screw, and the other end is approximately polygonal for holding the tool handle; there is also an inner ring gear, which is installed coaxially with the body, on which It is equipped with: inner gear teeth, several semi-holes of the rotating shaft, several accommodation spaces for anti-loosening parts, several moving spaces for driving keys and positioning pits; a transmission part, which is a rotary composite structure, on which is provided: The vertical surface of the force transmission end surface at an acute angle, the inner cone screw mosquito, the ratchet integrated with the transmission part, several small shafts whose axis is parallel to the thread surface axis, installed on the small shaft and respectively connected to the inner ring gear and the threaded surface. A number of small gears meshed with the middle gear on the body; half of the bracket bearing is placed between the load-bearing platform of the body and the force transmission end face of the transmission part, and a bracket and several rolling elements are arranged on it. The bracket is an open hollow cone. Bench shape, the inclination angle between the generatrix and the plane of the rolling body is equal to the corresponding angle of the bearing platform of the machine body, the radius of the inscribed circle in the non-working direction of the rolling body is greater than the inner radius of the bracket; an axial positioning ring locates the transmission part On the body; several elastic anti-loosening parts are installed in the anti-loosening part accommodation space of the inner ring gear and can swing around the half-hole of the rotating shaft. There are: rotating shaft part, mandrel, claw part and raised part And the support part, the shaft part and the mandrel are the swing center of the anti-loosening part, and the claw part is engaged with the ratchet teeth on the transmission part in the working state to prevent the transmission part from rotating in reverse relative to the clamping part; a control sleeve , is composed of a jacket and a control ring, the jacket surface is provided with stripes for easy grip, the control ring is provided with: longitudinal connecting serrations distributed along the circumference for fixed connection with the jacket, several control keys, There are several driving keys, and there are protrusions on the sides of the driving keys. The control keys control the engagement of the claws of the elastic anti-loosening parts with the ratchet by pressing the protrusions of the elastic anti-loosening parts. The driving keys are used to drive the inner ring gear to rotate ; a circlip, installed between the elastic anti-loosening part and the pinion of the transmission part; an elastic circlip, installed in the annular groove at the front of the body and axially positioning the inner ring gear and the outer sleeve on the body; a rear cover , assembled at the tail of the body, on which there are holes connected with the tail of the body and several coupling keys; several anti-friction components are installed between the body and the control jacket, or between the transmission part and the control jacket, and the friction coefficient is small. The material (such as: polytetrafluoroethylene or graphite) and frame or rolling element and cage.

The purpose of this utility model can further be realized like this. According to the handle tool clamping structure proposed by the utility model, it is mainly installed on the drive mandrel driven by the power source, and the drive mandrel drives it to rotate in the forward and reverse directions. The clamping structure includes: a body whose rear end is connected to the drive spindle, and several clamping parts connected to the body, and is characterized in that: the front end of the body forms an accommodating space for clamping tool handles, and in the accommodating space Inside, a counterbore whose length is greater than the length of the screw head of the screw connecting the body to the drive mandrel, a number of guide grooves evenly distributed on the conical surface coaxial with the body, a load-bearing boss, and a circular column around the body The longitudinal connecting fine teeth distributed on the surface and the screw hole or taper hole connected with the drive spindle at the rear; The prismatic shape is used to clamp the tool handle; there are also: a middle gear, which is fixedly installed on the connecting teeth of the body; a ratchet, which is also fixedly installed on the connecting teeth of the body; , which is provided with: inner gear teeth, several semi-holes of the rotating shaft, several accommodation spaces for anti-loosening parts, several moving spaces for driving keys and positioning pits; a transmission part, which is a set of The rotary body assembly is composed of a nut, a transmission sleeve, several small shafts and several small gears. The nut is provided with a tapered thread, a force transmission end surface and connecting teeth distributed on the outer cylindrical surface. The transmission sleeve is fixed on the Outside the connecting teeth of the nut, the small shaft is parallel to the axis of the transmission sleeve and is fixedly installed on the circumference of the end face of the transmission sleeve with the axis as the center. The middle gears on the body are meshed; the half-bracket bearing is placed between the load-bearing platform of the body and the force transmission end face of the transmission part, and a bracket and several rolling bodies are arranged on it. The bracket is ring-shaped, and the rolling bodies are distributed. On it, the radius of the inscribed circle in the non-working direction of the rolling body, that is, the radial direction, is greater than the inner radius of the bracket; several elastic anti-loosening parts are installed in the anti-loosening part accommodation space of the inner ring gear and can be half-holed around its rotating shaft Swing, on which there are: rotating shaft, mandrel, claw, protruding part and supporting part. The rotating shaft and mandrel are the swing center of the anti-loosening part. The engagement is used to prevent the transmission part from rotating in reverse relative to the clamping part; a control jacket is composed of a jacket and a control ring. An annular connection groove, the control ring is provided with: connection teeth distributed on the outer circumference for fixed connection with the outer casing, several control keys, several drive keys, and protrusions on the sides of the drive keys. The protruding part of the loose part is used to control the engagement between the claw part of the elastic anti-loose part and the ratchet. The driving key is used to drive the inner ring gear to rotate; a retaining ring is installed between the elastic anti-loose part and the pinion on the transmission part; The rear cover is assembled in the ring-shaped connecting groove of the jacket, and there are holes for flexible connection with the tail of the machine body; several anti-friction components are installed between the machine body and the jacket, or between the transmission part and the control jacket, and the friction coefficient is small. The material (such as: polytetrafluoroethylene or graphite) and frame or rolling element and cage.

The progressive effects that the utility model can show through the above technical solutions are: when the control overcoat is rotated, the driving key is driven to push the inner ring gear to rotate, and the pinion gear and the body (or fixedly connected on the body) The transmission relationship of the middle gear of the ) can generate a greater rotational torque when there is resistance, and the drive transmission part relative to the body, and the drive transmission part (or nut) thread produces relative rotation relative to the thread of the clamping part, and pushes the clamp The holder clamps the tool handle with greater force along the guide groove of the machine body; in the above process of clamping the tool handle, when the holder is subjected to the reaction force of the tool handle, the protrusion of the drive key on the control ring passes through and The engagement of the positioning pit of the inner ring gear and the "click" sound give the operator a signal to start clamping, and at this time the claw of the anti-loosening part is also engaged with the ratchet under the control of the control key; continue to rotate the control When the jacket makes the clamping part forcefully clamp the tool handle, the claw part of the anti-loosening part moves elastically relative to the ratchet and makes a "click" and "click" sound, prompting to enter the process of force clamping. When the clamping part clamps the tool handle and is in the working state of vibration and shock, the engagement between the claw part of the anti-loosening part and the ratchet has the function of preventing reverse rotation. The transmission relationship of the middle gear on the top) prevents the transmission part (or nut) from rotating in reverse relative to the clamping part, so that the tool handle will not be loosened from the clamping part under the condition of vibration and shock.

When you want to loosen the handle of the tool, turn the control sleeve in the opposite direction, and the protrusion of the drive key will engage with the other reverse positioning pit of the inner ring gear and make a "click" sound to give the operator a signal to start loosening. Signal.

To sum up, the beneficial effects of the utility model are: first, the tool handle can be clamped with greater force; second, it can be prompted to start the clamping process with force; and, third, it can ensure , the tool shank will not loosen from the holder.

Description of drawings

Fig. 1 is a front sectional view of the first embodiment of the clamping structure of the present invention.

Fig. 2 is a sectional view along D-D direction of Fig. 1 (remove part 19).

Fig. 3 is a sectional view along J-J direction of Fig. 1 and Fig. 11 .

Fig. 4 is a sectional view along line H-H of Fig. 3 .

Fig. 5 is a front cross-sectional view of the half-support bearing in the first embodiment and the second embodiment of the clamping structure of the present invention.

FIG. 6 is a top view of FIG. 5 .

Fig. 7 is a K-direction view of Fig. 8 .

Fig. 8 is a main cross-sectional view (C-C cross-sectional view of Fig. 7) of the transmission part after the small shaft and pinion are removed in the second embodiment of the clamping structure of the present invention.

Fig. 9 is a schematic diagram of the control ring of the control jacket in the second embodiment of the clamping structure of the present invention.

Fig. 10 is a sectional view along B-B direction of Fig. 9 .

Fig. 11 is a front sectional view of the second embodiment of the clamping structure of the present invention.

Fig. 12 is a sectional view along A-A direction of Fig. 11 .

Fig. 13 is a front sectional view of the third embodiment of the clamping structure of the present invention.

Fig. 14 is a cross-sectional view along F-F direction of Fig. 13 (part 37 is removed).

Fig. 15 is a cross-sectional view along the line G-G of Fig. 13 .

Detailed ways

The clamping structure of the present utility model can be used to clamp handle-type tools, such as drill bits, thread cutters, etc., which produce the main function by rotating motion. For the convenience of description, they are collectively referred to as tool handles in this specification. Below in conjunction with accompanying drawing, the utility model is described further.

Please refer to Figures 1 to 6; the first embodiment of the clamping structure of the present utility model includes:

A body 1, the body mainly includes: a screw hole or a taper hole 106 connected with the power source transmission mandrel 001 at its rear, a plurality of coupling grooves 107, an accommodating space 101 for clamping a tool handle at its front end, The inside of the accommodation space 101 has a counterbore 102 whose length L is greater than the length e of the screw head 002 of the screw that connects the body to the drive mandrel, several guide grooves 103 evenly distributed on the conical surface coaxial with the body, and bearings. Force boss 104, middle gear 105 and connection serration 108 integrated with the body;

Several clamping parts 3, which are assembled in the guide groove 103 of the body 1, have an incomplete screw 301 at one end, and an approximately polygonal shape 302 at the other end, for clamping the tool handle;

An inner ring gear 17, which is installed coaxially with the body 1, and is provided with: inner gear teeth 171, half holes 172 of the rotating shaft, accommodating space 173 for locking parts, moving space 174 for driving parts and positioning pits 175 and 176;

A transmission member 18, which is a rotary combined structure, is provided with: a force transmission end surface 181 forming an acute angle with the vertical surface of its axis, an inner cone screw 182, several small shafts 183 whose axes are parallel to the axis of the thread surface, A plurality of small gears 184 that are installed on the small shaft and mesh with the ring gear teeth 171 and the gear 105 in the body respectively;

A ratchet 15, fixedly mounted on the connecting serration 108 of the body, on which a ratchet 151 and a retaining ring portion 152 are arranged;

Several elastic anti-loosening parts 11 are installed in the anti-loosening part accommodating space 173 of the inner ring gear and can swing around the half hole 172 of the rotating shaft. Part 113 and supporting part 114;

Half of the bracket bearing 5 is placed between the force-bearing boss 104 of the body and the force-transmitting end face 181 of the transmission part, on which a bracket 502 and several rolling elements 501 are arranged; The inclination angle φ of the plane where the rolling element 501 is located is equal to the corresponding angle of the load-bearing boss of the body, and the radius R2 of the inscribed circle in the non-working direction of the rolling element 501, that is, the radial direction, is greater than the inner radius R1 of the bracket;

An axial positioning ring 121, positioning the transmission member 18 on the body 1;

A control jacket 14, which is provided with: stripes 145 on the outer surface for easy gripping, several control keys 141, several connecting keys 144, several driving keys 142, and protrusions 143 on the sides of the driving keys;

A retaining ring 19 is installed between the elastic anti-loosening part 11 and the pinion 184 on the transmission part;

A front cover 16, which is set on the front part of the body 1 and the control jacket 14, is provided with a coupling groove 161 and is connected with the coupling key 144 of the control jacket;

An anti-friction component 13 is made of a product 132 and a frame 131 made of a material with a small friction coefficient (such as polytetrafluoroethylene or graphite), and is installed between the body 1 and the control jacket 14;

A rear cover 2 is assembled on the tail of the body, and is provided with a hole connected with the tail of the body and several connecting keys 207 .

Please refer to Figures 7 to 12; the second embodiment of the clamping structure of the present invention includes:

A body 1, the body mainly includes: a screw hole or a tapered hole 106 connected to the power source transmission spindle 001 at its rear; several coupling grooves 107; Inside the space 101, a counterbore 102 whose length L is greater than the length e of the screw head 002 of the screw connecting the body to the drive mandrel; several guide grooves 103 evenly distributed on the conical surface coaxial with the body; bearing force Boss 104; Middle gear teeth 105 integrated with the body;

Several clamping parts 3, which are assembled in the guide groove 103 of the body 1, have an incomplete screw 301 at one end, and an approximately polygonal shape 302 at the other end, for clamping the tool handle;

An inner ring gear 7, which is installed coaxially with the body 1, on which there are: inner gear teeth 701, half holes 702 for the rotating shaft, accommodating space 703 for locking parts, moving space 704 for driving keys and positioning pits 705;

A transmission member 6, which is a rotary combined structure, is provided with: a force transmission end surface 601 forming an acute angle with the vertical surface of its axis, an inner conical surface screw 602, several small shafts 603 whose axes are parallel to the axis of the thread surface, Several pinion gears 604 installed on the small shaft and meshing with the gear teeth 701 of the inner ring gear and the gear teeth 105 of the body respectively, and the ratchet teeth 605 distributed on the outer surface of the transmission member;

Several elastic anti-loosening parts 11 are installed in the anti-loosening part accommodating space 703 of the inner ring gear and can swing around the half hole 702 of the rotating shaft, on which are provided: rotating shaft part 112, mandrel 115, claw part 111, protrusion Part 113 and supporting part 114;

Half of the bracket bearing 5 is placed between the force-bearing boss 104 of the body and the force-transmitting end face 601 of the transmission part, on which a bracket 502 and several rolling elements 501 are arranged; The inclination angle φ of the plane where the rolling element 501 is located is equal to the corresponding angle of the load-bearing boss of the body, and the radius R2 of the inscribed circle in the non-working direction of the rolling element 501, that is, the radial direction, is greater than the inner radius R1 of the support (see Figure 6);

An axial positioning ring 121, positioning the transmission member 6 on the body 1;

A control overcoat is composed of an overcoat 4 and a control ring 9, the surface of the overcoat is provided with stripes 405 for easy gripping, and the control ring is provided with longitudinal connecting serrations 904 distributed along the circumference for use with the control ring. The jacket 4 is fixedly connected, several control keys 901, and several driving keys 902. There are protrusions 903 and 904 on the sides of the driving keys. The control keys control the claws of the elastic locking parts by pressing the protrusions of the elastic locking parts. Engaging with the ratchet, the driving key is used to drive the inner ring gear to rotate;

A retaining ring 69 is installed between the elastic anti-loosening part 11 and the pinion 604 on the transmission part; a friction-reducing assembly 13 is made of a material (for example: polytetrafluoroethylene or graphite) product 132 and a frame with a small friction coefficient 131, which is installed between the body 1 and the overcoat 4;

A circlip 122 is mounted on the front of the body.

Please refer to Figures 13 to 15; the third embodiment of the clamping structure of the present invention includes:

A body 1, the body mainly includes: a screw hole or a tapered hole 106 connected to the power source transmission spindle 001 at its rear; several coupling grooves 107; Inside the space 101, a counterbore 102 whose length L is greater than the length e of the screw head 002 of the screw connecting the body to the drive mandrel; several guide grooves 103 evenly distributed on the conical surface coaxial with the body; bearing force Boss 104; connecting serrations 109 annularly distributed around the outer cylindrical surface of the body;

Several clamping parts 3, which are assembled in the guide groove 103 of the body 1, have an incomplete screw 301 at one end, and an approximately polygonal shape 302 at the other end, for clamping the tool handle;

A middle gear 41 is fixedly mounted on the connecting serrations 109 of the body, and has gear teeth 415 on it;

An inner ring gear 27, which is installed coaxially with the body 1, and is provided with: inner gear teeth 271, half holes 272 of the rotating shaft, accommodating space 273 for locking parts, moving space 274 for driving keys and positioning pits 275 and 276;

A transmission part, the transmission part is a revolving body assembly set on the body, and is composed of a nut 26, a transmission sleeve 36, a number of small shafts 363 and a number of pinion gears 364. The nut is provided with tapered threads 262, transmission The force end surface 261 and the connecting serrations 266 distributed on the outer cylindrical surface, the transmission sleeve 36 is fixedly fitted outside the connection serrations 266 of the nut, the small shaft 363 is parallel to the axis of the transmission sleeve and is fixedly installed on the end surface of the transmission sleeve with the axis On the circumference of the center of the circle, the pinion 364 is installed on the small shaft and meshes with the gear teeth 271 of the inner ring gear and the gear teeth 415 of the middle gear installed on the body;

Several elastic anti-loosening parts 11 are installed in the anti-loosening part accommodating space 703 of the inner ring gear and can swing around the half hole 702 of the rotating shaft, on which are provided: rotating shaft part 112, mandrel 115, claw part 111, protrusion Part 113 and supporting part 114;

Half of the bracket bearing 15 is placed between the load-bearing boss 104 of the body and the force-transmitting end face 261 of the transmission part, on which a bracket and several rolling elements are arranged. The bracket is ring-shaped, and the rolling elements are distributed on it. The radius of the inscribed circle in the non-working direction of the rolling element, that is, the radial direction, is greater than the inner radius of the bracket;

A ratchet 51 is fixedly mounted on the connecting serrations 109 of the body, on which a ratchet 515 is provided;

A control overcoat is composed of an overcoat 34 and a control ring 39, the surface of the overcoat is provided with stripes 345 for easy gripping, and the control ring is provided with: longitudinally connecting serrations 394 distributed along the circumference for connecting with the overcoat 34 fixed connection, several control keys 391, several driving keys 392, there is a protrusion 393 on the side of the driving key, and the control key controls the engagement of the pawl 111 and the ratchet 51 by pressing the protrusion 113 of the elastic anti-loosening part , the drive key 392 is used to drive the ring gear 27 to rotate;

A retaining ring 37 is installed between the elastic anti-loosening part 11 and the pinion 364 on the transmission part;

A friction-reducing member 40 is made of a material with a small friction coefficient (for example: polytetrafluoroethylene or graphite), which is installed between the body 1 and the jacket 34 .

Now take the first embodiment as an example to illustrate the action process of the clamping structure of the present invention. Insert a tool handle 003 into the accommodating space 101 of the tool handle of the body, relatively rotate the control overcoat 14 and the rear cover 2 assembled on the body in the clamping direction, and the drive key 142 of the control overcoat passes through its protrusion 143 and The meshing of the positioning pit 176 of the inner ring gear pushes the inner ring gear 17 to rotate relative to the body 1, and the transmission member 18 also moves relative to the body due to the meshing transmission of the pinion 184 on it with the inner ring gear 17 and the gear teeth 105 of the body at the same time. 1 rotation, that is, the thread 182 of the transmission part rotates relative to the thread 301 of the clamping part assembled on the body, and the clamping part 3 approaches and clamps the upper tool handle 003. Continue to increase the torque of the relative rotation control sleeve 14 and the rear cover 2 assembled on the body, and the driving key moves in the clamping direction until its protrusion 143 engages with another positioning recess 175 of the inner ring gear and makes a "click" sound, and the driving key 142 is also in contact with the side wall of the driving key moving space 174 in the clamping direction. On the ratchet 151 engagement. Continue to increase the torque of the relative rotation control overcoat 14 and the rear cover 2 assembled on the body. When the driving key 142 pushes the ring gear 17 to make a small rotation, the pawl 111 of the elastic anti-loosening part is on the ratchet 151. The continuous "click" and "click" sound of elastic jumping indicates that the drive key is gradually clamping the tool handle.

When the tool handle needs to be loosened, the control overcoat 14 and the back cover 2 are rotated in the opposite direction, and the control key 141 moves in the opposite direction and disengages the protrusion 113 of the elastic anti-loosening part. The pawl 111 of the claw disengages from the engagement with the ratchet 151, and at the same time, when the protruding portion 143 of the drive key moves to engage with the other reverse positioning recess 176 of the inner ring gear, a "click" sound is issued to the operator to start signal to let go.

Claims (10)

1. A handle tool clamping structure, which is mainly installed on the transmission mandrel driven by the power source. The clamping structure includes: a body connected to the drive mandrel at the rear end, several The clamping part is characterized in that: the front end of the body forms an accommodating space for clamping the handle of the tool, and inside the accommodating space, a counterbore whose length is greater than the length of the screw head of the screw that connects the body to the drive mandrel is uniform. Several guide grooves distributed on the conical surface coaxial with the body, a force-bearing boss forming an acute angle with the vertical plane of the body axis, several coupling grooves at the rear of the body, an annular ring at the front of the body Groove, connecting serrations distributed around the outer cylindrical surface of the machine body and the screw hole or taper hole connected with the drive spindle at the rear; The clamping part is assembled in the guide groove of the machine body, with an incomplete screw at one end, and an approximately polygonal shape at the other end for clamping the tool handle; Also features: A middle gear, fixedly installed on the coupling serrations of the machine body; An inner ring gear, installed coaxially with the machine body, on which are provided: inner gear teeth, several half-holes for the rotating shaft, several accommodation spaces for anti-loosening parts, several moving spaces for driving keys, and positioning pits; A transmission part, which is a rotary combined structure, is provided with: a force transmission end surface at an acute angle to the vertical plane of its axis, an inner cone screw, several small shafts whose axes are parallel to the thread surface axis, installed on the small A number of small gears on the shaft and respectively meshing with the ring gear and the middle gear installed on the machine body; A ratchet, fixedly installed on the connecting serrations of the body, on which a ratchet and a retaining ring are arranged; Several elastic anti-loosening parts are installed in the anti-loosening part accommodation space of the inner ring gear and can swing around the half hole of the rotating shaft, on which there are: rotating shaft part, mandrel, claw part, raised part and supporting part; Half of the bracket bearing is placed between the load-bearing boss of the machine body and the force-transmitting end face of the transmission part. There are brackets and several rolling elements mounted on it and distributed on the same circumference. The bracket is hollow with openings. Frustum-shaped, the inclination angle between the generatrix and the plane of the rolling body is equal to the corresponding angle of the load-bearing platform of the body, and the radius of the inscribed circle in the non-working direction of the rolling body, that is, the radial direction, is greater than the inner radius of the support; An axial positioning ring to position the transmission part on the machine body; A control jacket, which is provided with: stripes on the outer surface for easy gripping, several control keys, several connecting keys, several driving keys, and protrusions on the sides of the driving keys; A rear cover, which is assembled on the tail of the body, is provided with a hole connected with the tail of the body and several connecting keys; A retaining ring, installed between the elastic anti-loosening part and the pinion on the transmission part; Several anti-friction components are composed of materials with small friction coefficient and frames or rolling elements and cages, which are installed between the machine body and the control casing, or the transmission part and the control casing. 2. The handle tool holding structure according to claim 1, characterized in that: a front cover is installed on the front part of the machine body, and an annular coupling groove is arranged on it. 3. The handle tool clamping structure according to claim 1, characterized in that: a circlip is installed at the front of the body to axially position the inner ring gear and the front cover on the body. 4. The clamping structure for handle tools according to claim 1, characterized in that: the ratchet can be integrated with the machine body. 5. The handle tool holding structure according to claim 1, characterized in that: the ratchet can be integrated with the transmission member. 6. The clamping structure for handle tools according to claim 1, characterized in that: the transmission part is a set of rotating body assembly set on the machine body, which is composed of nuts, transmission sleeves, several small shafts and several pinion gears The nut is provided with a tapered thread, a force transmission end surface and connecting serrations distributed on the outer cylindrical surface. The transmission sleeve is fixedly fitted on the connection serrations of the nut. The small shaft is parallel to the axis of the transmission sleeve and is fixedly installed on the The end face of the transmission sleeve is on the same circle with the axis as the center, and the pinion is installed on the small shaft and meshes with the inner ring gear and the middle gear installed on the machine body respectively. 7. The handle tool holding structure according to claim 1, characterized in that: the body and the middle gear are integrally made. 8. The clamping structure of handle tool according to claim 1, characterized in that: the control overcoat can be a combination of the overcoat and the control ring fixedly connected together, and the overcoat is an outer surface with a handle for easy gripping. The striped sleeve-shaped member is provided with an annular connection groove, and the control ring is provided with: connection teeth distributed on the outer circumference for fixed connection with the outer casing, several control keys, several drive keys, and drive keys on the sides. Raised part. 9. The handle tool holding structure according to claim 1, characterized in that: the rear cover can be embedded in the annular coupling groove of the casing. 10. The clamping structure for shank tools according to claim 1, characterized in that: the half-support bearing is composed of a ring-shaped support and several rolling bodies mounted on it and distributed on the same circumference, and the rolling bodies are not The radius of the inscribed circle in the working direction, that is, the radial direction, is greater than the inner radius of the bracket.

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