WO2020113703A1

WO2020113703A1 - Switch device, drill chuck, and bidirectional rotation method for drill chuck

Info

Publication number: WO2020113703A1
Application number: PCT/CN2018/123240
Authority: WO
Inventors: 柳尧亭
Original assignee: 柳尧亭
Priority date: 2018-12-03
Filing date: 2018-12-24
Publication date: 2020-06-11
Also published as: CN109365849B; CN109365849A

Abstract

A switch device, a drill chuck, and a bidirectional rotation method for the drill chuck. The switch device comprises a switch sleeve (200) and a clutch mechanism; the clutch mechanism comprises a first transmission portion (201) and a second transmission portion (202); the first transmission portion (201) is configured to be connected to a front body (101) of the drill chuck, and the second transmission portion (202) is configured to be connected to a rear body (100) of the drill chuck; the engagement or separation between the first transmission portion (201) and the second transmission portion (202) can correspondingly engage or separate the front body (101) and the rear body (100); and the switch sleeve (200) can engage or separate the first transmission portion (201) and the second transmission portion (202) by means of its own rotation. The present switch device can drive a drilling tool to perform bidirectional work, and the switch sleeve (200) can prevent the loosening of the drilling tool during idling rotation. Moreover, the operation and method for replacing the drilling tool is as simple and convenient as that for a keyless drill chuck, so that the defect that the operation method of a self-tightening drill chuck is more complicated than that of a keyless drill chuck is overcome.

Description

Switch device, drill chuck and method for bidirectional rotation of drill chuck

Cross-reference of related applications

This disclosure requires the priority of the Chinese patent application with the application number 2018114684512 and the name "switching device, drill chuck and method for bidirectional rotation of the drill chuck" submitted to the Chinese Patent Office on December 03, 2018. References are incorporated in this disclosure.

Technical field

The present disclosure relates to the technical field of drill chucks, in particular to a switch device, a drill chuck and a method for bidirectional rotation of the drill chuck.

Background technique

When the self-tightening drill chucks on the market suddenly start in the vibrating working state or in the idling state, and the rotation direction of the idling is the direction of loosening the drill, the loosening of the drill is prone to occur, even causing the drill to loose from the drill The detachment of the chuck; and when replacing the drilling tool, the operation method of the self-tightening drill chuck is more complicated than the hand-tight drill chuck on the market, which is not conducive to the use of the operator and limits the sales of the self-tightening drill chuck. .

Summary of the invention

The purpose of the present disclosure includes, for example, to provide a switching device, a drill chuck and a method for bidirectional rotation of the drill chuck to solve the vibrating working state or idling state of the self-tightening drill chuck existing in the prior art Under the sudden start, and the idle rotation direction is the direction of loosening the drill, it is easy to loosen the drill and even cause the technical problem of the drill falling off the drill chuck.

The embodiments of the present disclosure can be implemented as follows:

An embodiment of the present disclosure provides a switch device including a switch sleeve and a clutch mechanism; the clutch mechanism includes a first transmission portion and a second transmission portion, the first transmission portion is configured to be a precursor of a drill chuck Connected, the second transmission part is configured to be connected with the rear body of the drill chuck, the engagement or disconnection between the first transmission part and the second transmission part can correspondingly make the front body and The rear body is engaged or disconnected; the switch sleeve can engage or disconnect the first transmission part and the second transmission part through its own rotation.

Optionally, the first transmission portion is a front adapter, and the front surface of the front adapter has first end teeth; the second transmission portion is a rear adapter, and the end surface of the rear adapter has a first Two end face teeth, the first end face teeth and the second end face teeth can be meshed; the first end face teeth and the second end face teeth can be meshed to realize the first transmission part and the second transmission part When they are engaged, the first end face teeth and the second end face teeth are separated to enable the first transmission part and the second transmission part to be disconnected.

Optionally, the switch device further includes an elastic fitting, and rotation of the switch sleeve can deform the elastic fitting so that the first transmission part and the second transmission part can be engaged or broken open.

Optionally, the switch sleeve includes a rotating part and at least one contact, the contact is connected to the rotating part, and the rotation of the rotating part enables the contact to urge the elastic fitting to make The elastic fitting is deformed.

Optionally, the elastic fitting includes a raised spring piece; the rotation of the switch sleeve causes the contact to press down the raised spring piece, so that the first transmission part and the second transmission part Able to join.

Optionally, a positioning protrusion is installed on a surface of the warped elastic sheet, and the positioning protrusion is configured to cooperate with a positioning socket on a lower surface of the contact.

Optionally, the elastic fitting includes a warped spring piece; the rotation of the switch sleeve causes the contact to push the warped spring piece so that the first transmission part and the second transmission part Able to disconnect.

Optionally, the elastic fitting includes a ring-shaped portion, the number of the raised elastic pieces is plural, and the number of the raised elastic pieces is equal to the number of the contacts, one for each of the contacts A warped elastic piece; a plurality of the warped elastic pieces are evenly distributed along the outer periphery of the annular portion, and an angle is formed between the longitudinal direction of the warped elastic piece and the annular surface of the annular portion.

Optionally, the switching device further includes a return elastic member configured to make the first transmission part and the second transmission part disconnect when the first transmission part and the second transmission part are disconnected There is a tendency to move towards each other.

An embodiment of the present disclosure also provides a drill chuck including a front body, a rear body, a clamping jaw, and the switch device; the rear body can rotate relative to the front body, and the rear body is configured To drive the jaw to move in the first direction; the first transmission part is connected to the front body, and the second transmission part is connected to the rear body.

Optionally, the front body is provided with a clamping jaw slideway, the clamping jaw is provided in the clamping jaw slideway, and the clamping jaw can move along the guiding direction of the clamping jaw slideway; One direction is parallel to the guiding direction of the jaw slide.

Optionally, the drill chuck further includes a driven bevel gear, the driven bevel gear is disposed in the gear accommodating hole of the front body; the driven bevel gear is sleeved on the clamping jaw, And the driven bevel gear and the clamping jaw are driven by threads;

The front end of the rear body is fixed with a driving bevel gear, and the rear body is inserted in the axial receiving hole of the front body, and the driving bevel gear is meshed with the driven bevel gear.

Optionally, the rear body includes a driving part and an external part, the driving part is connected to the external part, and the driving part has a screw structure;

The driving part is screw-driven with the clamping jaws through the thread structure to move the clamping jaws in the first direction;

Or, the driving part is screw-driven with the connecting member connected to the clamping jaw through the screw structure, so that the clamping jaw moves in the first direction.

Optionally, the switch sleeve is disposed on the front body, and a limited groove is formed on the front body, which is configured to limit the rotation angle of the switch sleeve on the front body.

Optionally, the inner wall of the switch sleeve has a first limit step, the front body has a second limit step, the switch sleeve is sleeved on the front body, and the first limit step The step surface may be in contact with the step surface of the second limit step to prevent the switch sleeve from moving toward the front end of the front body.

An embodiment of the present disclosure also provides a method for bidirectional rotation of a drill chuck. The drill chuck includes a front body and a rear body. The method includes:

A clutch mechanism is installed between the front body and the rear body, wherein the first transmission portion of the clutch mechanism is connected to the front body, and the second transmission portion of the clutch mechanism is connected to the rear body through The engagement or disconnection between the first transmission part and the second transmission part can respectively engage or disconnect the front body and the rear body;

A switch sleeve is installed on the front body, and the switch sleeve is rotated to engage or disconnect the first transmission part and the second transmission part.

Compared with the prior art, the beneficial effects of the embodiments of the present disclosure include, for example:

The switch device, the drill chuck and the method for bidirectional rotation of the drill chuck provided in the embodiments of the present disclosure connect the first transmission part with the front body and the second transmission part with the rear body. When the second transmission part is engaged, the front body and the rear body remain relatively fixed, so that the front body, the rear body and the drilling tool can be rotated forward or reverse together, so that the drill chuck has the function of driving the drill tool to rotate forward And the function of driving the drill tool to reverse, and the drill tool will not loosen on the drill chuck. By rotating the switch sleeve, the first transmission part and the second transmission part can be disconnected, so that the drill can be removed from the drill chuck, so that the self-tightening drill chuck can be bidirectionally rotated by the clutch mechanism. In order to drive the drilling tool to perform bidirectional work, the switch sleeve is used to prevent the drilling tool from loosening during idling, and the user experience is better; and the operation method of replacing the drilling tool is exactly the same as the hand-tight drill chuck on the market. Tight chucks are simple and convenient.

BRIEF DESCRIPTION

In order to more clearly explain the specific embodiments of the present disclosure or the technical solutions in the prior art, the following will briefly introduce the drawings required for the specific embodiments or the description of the prior art. Obviously, The drawings are some embodiments of the present disclosure. For those of ordinary skill in the art, without paying any creative labor, other drawings can also be obtained based on these drawings.

1 is an exploded view of a switch device provided by an embodiment of the present disclosure;

2 is an exploded view of a second modified structure of a switch device provided by an embodiment of the present disclosure;

3 is a perspective view of an elastic accessory provided by an embodiment of the present disclosure;

4 is a front view of an elastic accessory provided by an embodiment of the present disclosure;

Figure 5 is a left side view of Figure 4;

6 is a schematic diagram of a deformation structure of a switch sleeve provided by an embodiment of the present disclosure;

7 is an exploded view of a drill chuck provided by an embodiment of the present disclosure;

8 is an assembly diagram of a drill chuck provided by an embodiment of the present disclosure;

9 is a schematic structural view of a drill chuck according to another embodiment of the present disclosure from another perspective;

10 is a cross-sectional view taken along line A-A in FIG. 9;

11 is a schematic structural diagram of a second transmission part provided by an embodiment of the present disclosure;

12 is an exploded view of a second deformation structure of a drill chuck provided by an embodiment of the present disclosure;

13 is an assembly view of a second variant structure of a drill chuck provided by an embodiment of the present disclosure;

14 is an exploded view of a third deformation structure of the drill chuck provided by an embodiment of the present disclosure;

15 is an assembly diagram of a third variant structure of a drill chuck provided by an embodiment of the present disclosure;

16 is an exploded view of a fourth deformation structure of the drill chuck provided by an embodiment of the present disclosure;

17 is an assembly diagram of a fourth variant structure of a drill chuck provided by an embodiment of the present disclosure;

18 is an exploded view of a fifth variant structure of a drill chuck provided by an embodiment of the present disclosure;

19 is an assembly diagram of a fifth variant structure of a drill chuck provided by an embodiment of the present disclosure;

20 is an exploded view of a sixth variant structure of the drill chuck provided by an embodiment of the present disclosure;

21 is an assembly diagram of a sixth variant structure of a drill chuck provided by an embodiment of the present disclosure.

Icons: 100-rear body; 101-front body; 102-jaw; 103-jaw slideway; 104-pin; 105-driven bevel gear; 106-gear accommodating hole; 107-axial accommodating hole; 108-driving bevel gear; 109-external thread; 111-screw; 112-axial stop; 113-large aperture part; 114-small aperture part; 115-front end; 116-rear end; 119-front sleeve ; 121-rear sleeve; 122- sleeve body; 123- sleeve cover; 124- axial threaded hole; 127-drill receiving hole; 200- switch sleeve; 201- first transmission part; 202- second transmission part; 203 -Rotating part; 204-contact; 205-connecting rod; 206-first end face tooth; 207-second end face tooth; 208-elastic fitting; 209-turned spring piece; 210-ring part; 211-inclined face; 212-positioning protrusion; 213-waist round hole; 214-limiting groove; 215-positioning socket; 216-returning elastic member; 217-driving part; 218-external part; 219-first limiting step; 220 -Second limit step; 221-Third limit step; 222-Screw.

detailed description

The technical solutions of the present disclosure will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present disclosure, but not all of the embodiments.

Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present disclosure.

In the description of this disclosure, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear The orientation or positional relationship indicated by "" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation The azimuth is constructed and operated, and therefore cannot be understood as a limitation to the present disclosure.

In addition, if the terms “first”, “second”, and “third” appear, they are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the connection between two components. For those of ordinary skill in the art, the specific meaning of the above terms in the present disclosure may be understood in specific situations.

It should be noted that the features in the embodiments of the present disclosure can be combined with each other without conflict.

Referring to FIGS. 1 to 7 and FIG. 11, an embodiment of the present disclosure provides a switch device including a switch sleeve 200 and a clutch mechanism; the clutch mechanism includes a first transmission part 201 and a second transmission part 202, the first The transmission part 201 is configured to be connected with the front body 101 of the drill chuck, the second transmission part 202 is configured to be connected with the rear body 100 of the drill chuck, the engagement between the first transmission part 201 and the second transmission part 202 or The disconnection can correspondingly engage or disconnect the front body 101 and the rear body 100; the switch sleeve 200 can engage or disconnect the first transmission part 201 and the second transmission part 202 by its own rotation. The switch sleeve 200 is configured to be mounted on the front body 101 of the drill chuck, and the switch sleeve 200 is axially limited on the front body 101, that is to say, the switch sleeve 200 on the front body 101 is basically not relative to the front body 101 Axial displacement occurs, or the axial position of the switch sleeve 200 on the front body 101 is constant, to ensure that when the switch sleeve 200 rotates around the axis of the front body 101, the switch sleeve 200 can play a role in making the first transmission part 201 and the first The two transmission parts 202 are engaged or disconnected.

The switch device provided in this embodiment can not only meet the working requirements of the positive and reverse rotation of the self-tightening drill chuck, but also meet the needs of the self-tightening drill chuck like the hand-tight drill chuck to easily replace the drilling tool. The structure is reliable and the function is stable . After the first transmission part 201 is connected to the front body 101 and the second transmission part 202 is connected to the rear body 100, when the first transmission part 201 and the second transmission part 202 are joined, the front body 101 and the rear body 100 Keep it relatively fixed, so that the front body 101, the rear body 100 and the drilling tool can rotate forward or reverse together, so that the drill chuck has the function of driving the drill tool forward and the drill tool reversely. The tool will not loosen on the drill chuck. By rotating the switch sleeve 200, the first transmission part 201 and the second transmission part 202 can also be disconnected, which causes the front body 101 and the rear body 100 to be disconnected from the fixed connection, and the front body 101 and the rear body 100 can be realized. The free rotation of the drill, so that the drill can be initially clamped or removed from the drill chuck, so that the self-tightening drill chuck can be bidirectionally rotated by the function of the clutch mechanism and the switch sleeve 200 to drive the drill to bidirectionally The function of work and the function of replacing drilling tools. The switch sleeve 200 can also prevent the drilling tool from loosening or falling off due to the sudden start of the self-tightening drill chuck in a vibrating working state or reverse reverse idling, and the user experience is better.

With reference to FIG. 6, in an optional solution of this embodiment, the switch sleeve 200 includes a rotating part 203 and at least one contact 204, and the contact 204 is connected to the rotating part 203.

Specifically, the number of the contacts 204 is plural, and the rotating portion 203 is cylindrical; in this embodiment, the number of the contacts 204 is three to describe specifically; each contact 204 is fixed to the rotating through the connecting rod 205 The end surface of the portion 203; the contact 204, the connecting rod 205, and the rotating portion 203 may be an integral structure. The contact 204 and the connecting rod 205 have an L-shaped structure, and the length of the contact 204 extends in the direction in which the central axis of the rotating portion 203 is located.

In an optional solution of this embodiment, the first transmission part 201 is a front adapter; the second transmission part 202 is a rear adapter. The front adapter has an end face tooth 206 on the end face, and the rear adapter has an end face on the end face. Two end face teeth 207, the first end face teeth 206 and the second end face teeth 207 can be meshed, and the first end face teeth 206 and the second end face teeth 207 can be engaged to realize the engagement between the first transmission part 201 and the second transmission part 202, The separation of the first end face tooth 206 and the second end face tooth 207 can realize the disconnection between the first transmission part 201 and the second transmission part 202. The first transmission part 201 can be fixed to the front body 101 by screws, and the second transmission part 202 and the rear body 100 are relatively fixed in the radial direction of the rear body 100, and can be produced in the axial direction of the rear body 100 The relative axial displacement, that is to say, the second transmission part 202 can rotate synchronously with the rear body 100 or can move in the axial direction of the rear body 100.

In an optional solution of this embodiment, the switch device further includes an elastic fitting 208, and the rotation of the switch sleeve 200 can deform the elastic fitting 208 so that the first transmission part 201 and the second transmission part 202 can be engaged or broken open. In other words, after rotating the switch cover 200, the switch cover 200 applies force to the elastic fitting 208 through the contact 204, and the elastic fitting 208 is deformed before the first transmission part 201 and the second transmission part 202 can be engaged Or disconnected (in other words, the rotation of the rotating portion 203 can make the contact 204 urge the elastic fitting 208 to deform the elastic fitting 208). That is to say, the first transmission part 201 and the second transmission part 202 can be engaged by the deformation of the elastic fitting 208, or the first transmission part 201 and the second transmission part 202 can be realized by the deformation of the elastic fitting 208 Phase disconnected. The elastic fitting 208 may be fixed on the front body 101 by screws.

The switching device further includes a return elastic member 216 configured to make the first transmission part 201 and the second transmission part 202 have a tendency to move toward each other when the first transmission part 201 and the second transmission part 202 are disconnected Even if there is a tendency to realize the engaged state between the first transmission part 201 and the second transmission part 202. In an optional solution in this embodiment, the return elastic member 216 moves the second transmission part 202 in the direction in which the first transmission part 201 is located, so that the first transmission part 201 and the second transmission part 202 are engaged. After the switch sleeve 200 rotates by a certain angle in the clamping direction, the elastic fitting 208 does not apply force to the second transmission part 202. The second transmission part 202 realizes the second transmission part 202 and the first transmission part under the action of the return elastic part 216 201 is engaged, so that the drill on the drill chuck can be prevented from being loosened; after the switch sleeve 200 is rotated by a certain angle in the loosening direction, the force exerted by the elastic fitting 208 on the second transmission part 202 is greater than that of the return elastic piece 216 on the second The force applied by the second transmission part 202, so that the second transmission part 202 is disconnected from the first transmission part 201, so that the drill on the drill chuck can be released. The return elastic member 216 may be a wave spring washer.

The loosening direction is the rotation direction of the switch sleeve 200 when the drilling tool on the drill chuck can be loosened, and the clamping direction is the rotation direction of the switch sleeve 200 when the drilling tool on the drill chuck is clamped.

The following specifically describes the situation where the deformation of the elastic fitting 208 implements two different solutions:

The first embodiment solution: as shown in FIG. 1 and FIG. 3, in this solution, the elastic fitting 208 includes a tilted spring piece 209; the rotation of the switch sleeve 200 causes the contact 204 to lift the tilted spring piece 209 to make the first transmission The part 201 and the second transmission part 202 can be disconnected, that is, by the elastic piece 209 of the elastic fitting 208 being deformed, the first transmission part 201 and the second transmission part 202 can be disconnected to realize the self-tightening drill clamp Requirements for head replacement drilling tools. The elastic fitting 208 includes a ring-shaped portion 210, the number of the raised elastic pieces 209 is plural, and the number of the raised elastic pieces 209 is equal to the number of the contacts 204, one contact 204 corresponds to one raised elastic piece 209; a plurality of raised elastic pieces The 209 is evenly distributed along the outer peripheral edge of the annular portion 210, and the longitudinal direction of the warped elastic piece 209 has an angle with the annular surface of the annular portion 210. When the contact 204 rotates in the circumferential direction of the ring portion 210, the contact 204 can lift the warped elastic piece 209 in the direction of the second transmission portion 202, so that the first transmission portion 201 and the second transmission portion 202 are realized Can be separated; then rotate the switch sleeve 200 in the opposite direction, the contact 204 on the switch sleeve 200 will gradually reduce or lose its effect on the warped spring piece 209, the warped spring piece 209 automatically falls down to realize the first transmission part 201 and the second transmission part 202 are fully engaged automatically. In the solution of the first embodiment, when the contact 204 rotates along with the rotating portion 203 in the loosening direction, the contact 204 pushes up the warped elastic piece 209, and the force exerted by the warped elastic piece 209 on the second transmission portion 202 is greater than The force applied by the return elastic member 216 to the second transmission part 202 causes the second transmission part 202 to be disconnected from the first transmission part 201. When the contact 204 rotates with the rotating portion 203 in the clamping direction, the force of the contact 204 against the tilting elastic piece 209 gradually decreases, and when the tilting elastic piece 209 exerts less force on the second transmission portion 202 than the return elastic member 216 The force applied to the second transmission part 202, so that the second transmission part 202 is engaged with the first transmission part 201, can achieve the work requirements of the self-tightening drill chuck forward and reverse. In the first solution, the top surface of the contact 204 is an inclined surface 211, and the inclined surface 211 can be attached to the surface of the raised elastic piece 209, so that the contact 204 can be moved up and down during the rotation of the contact 204. The force between the warped elastic pieces 209 changes uniformly, and the contact 204 can be prevented from abrading the surface of the warped elastic pieces 209. In the first solution, the contact 204 on the switch sleeve 200 is at the lower part of the raised spring piece 209, and the contact 204 will lift the raised spring piece 209, and the first transmission part 201 and the second transmission part 202 will be realized. Separation; when the contact 204 on the switch sleeve 200 is reduced or loses control of the flipped spring piece 209, the flipped spring piece 209 will return to its original position and fall, losing its effect on the second transmission part 202, the first transmission The part 201 will automatically engage with the second transmission part 202.

The second embodiment: as shown in FIGS. 2, 3 and 6, in this solution, the elastic fitting 208 also includes a warped elastic piece 209; the rotation of the switch sleeve 200 causes the contact 204 to press down the warped elastic piece 209 to make The elastic piece 209 is lifted off the second transmission part 202, so that the second transmission part 202 moves toward the first transmission part 201 under the action of the return elastic member 216, so that the first transmission part 201 and the second transmission part 202 Can be joined, that is, the elastic piece 209 of the elastic fitting 208 is deformed, so that the first transmission part 201 and the second transmission part 202 can be engaged, so that the work requirements of the self-tightening drill chuck can be realized; If the switch sleeve 200 is rotated in the opposite direction, the contact 204 on the switch sleeve 200 will reduce or lose the impact on the tilting spring piece 209, and the tilting spring piece 209 will automatically spring up to move the first transmission part 201 and the second transmission The part 202 is completely separated. The elastic fitting 208 also includes a ring portion 210, and the number of the raised elastic pieces 209 is plural, and the number of the raised elastic pieces 209 is equal to the number of the contacts 204, one contact 204 corresponds to one raised elastic piece 209; The elastic pieces 209 are evenly distributed along the outer peripheral edge of the annular portion 210, and there is an angle between the longitudinal direction of the raised elastic piece 209 and the annular surface of the annular portion 210, and the height of the contact 204 extending beyond the annular surface of the annular portion 210 is Is smaller than the height between the free end of the warped elastic piece 209 and the annular surface of the ring-shaped portion 210 in the state without external force, so that when the contact 204 rotates in the circumferential direction of the ring-shaped portion 210, the contact 204 can The warped elastic piece 209 is pressed down in the direction of the annular surface of the ring portion 210, so that the first transmission portion 201 and the second transmission portion 202 can be engaged. In this second embodiment, a positioning protrusion 212 is also installed on the surface of the warped elastic piece 209. The contact 204 can be in contact with the positioning protrusion 212. By setting the positioning protrusion 212, it is configured to cooperate with the positioning socket 215 on the lower surface of the contact 204, that is, to maintain a constant and stable pressure on the warping elastic piece 209 to ensure warping The elastic piece 209 presses down against the annulus of the ring portion 210 to avoid the failure of the switch sleeve 200, which causes the two transmission parts of the drill chuck to suddenly break and fail to work. The positioning protrusion 212 may be located in the middle in the longitudinal direction of the raised elastic piece 209. The positioning protrusion 212 may be formed by punching a face of the warped elastic piece 209. In the second embodiment solution, when the contact 204 rotates along with the rotating portion 203 in the clamping direction, the contact 204 presses the tilting elastic piece 209 downward, and the force exerted by the tilting elastic piece 209 on the second transmission portion 202 gradually Reduced, when the force exerted by the tilting elastic piece 209 on the second transmission portion 202 is smaller than the force exerted by the return elastic member 216 on the second transmission portion 202, the second transmission portion 202 is engaged with the first transmission portion 201. When the contact 204 rotates in the loosening direction with the rotating portion 203, the force of the contact 204 against the tilting elastic piece 209 gradually decreases, and when the tilting elastic piece 209 exerts a greater force on the second transmission portion 202 than the return elastic member 216 The force applied to the second transmission part 202, so that the second transmission part 202 is disconnected from the first transmission part 201, so that the requirement of the self-tightening drill chuck to replace the drilling tool can be realized. In the second solution, the lower surface of the contact 204 is an inclined surface 211, and the inclined surface 211 can be attached to the surface of the raised elastic piece 209, so that the upper and lower sides of the contact 204 during the rotation of the contact 204 can be realized The force between the warped elastic pieces 209 changes uniformly, and the contact 204 can be prevented from abrading the surface of the warped elastic pieces 209. The lower surface of the contact 204 is also provided with a positioning socket 215 (see FIG. 6 ), which is configured to accommodate the positioning protrusion 212, which can also prevent the switch sleeve 200 from being in a vibrating working state or when the power tool is instantaneously reversed and started The accidental rotation of, and the loss of control of the flipped spring piece 209, may cause the first transmission part 201 and the second transmission part 202 to automatically separate, and the drilling tool to automatically fall off, unable to complete the work of the drill chuck. In the second solution, the contact 204 on the switch sleeve 200 is on the upper part of the flip spring 209, the contact 204 presses the flip spring 209, and the flip spring 209 loses the The function of the second transmission part 202 will realize the engagement of the first transmission part 201 and the second transmission part 202; when the contact 204 on the switch sleeve 200 is reduced or loses the control force of the lifting spring piece 209, the lifting spring piece 209 will return to its original position and pop up, separating the first transmission part 201 and the second transmission part 202.

Referring to FIGS. 7 to 10 and FIGS. 12 and 13, an embodiment of the present disclosure further provides a drill chuck, which includes a front body 101, a rear body 100, a clamping jaw 102, and the above-mentioned switch device; The rear body 100 can rotate relative to the front body 101, and the rear body 100 is configured to drive the jaws 102 to move in the first direction; the first transmission part 201 is connected to the front body 101, and the second transmission part 202 is connected to the rear body 100. The drill chuck may be a gear self-tightening drill chuck. The switching device in FIG. 1 is used in FIGS. 7 to 10; the switching device shown in FIG. 2 is used in FIGS. 12 and 13.

In an optional solution of this embodiment, the switching device is configured to engage or disconnect the rear body 100 and the front body 101. After the clamping jaw 102 clamps the drill, observe the drill chuck from the working end of the drill (for example, when the drill is a drill, the working end of the drill can drill holes in the object) in the direction of the drill chuck At this time, the counterclockwise rotation is the forward rotation of the drill chuck, and the clockwise rotation is the reverse rotation of the drill chuck. The rear body 100 rotates forward relative to the front body 101 to achieve clamping of the drilling tool by the clamping jaws 102, and the rear body 100 reverses relative to the front body 101 to achieve loosening of the drilling tool by the clamping jaws 102. The provisions of the forward and reverse directions of the rear body 100 and the forward and reverse directions of the front body 101 are both the same as the forward and reverse directions of the drill chuck. The forward and reverse rotation of the rear body 100 can drive the jaw 102 to move back and forth in the first direction. The rear body 100 can rotate relative to the front body 101 about the axis of the rear body 100, and the rear body 100 is disposed coaxially with the front body 101.

It should be noted that (1) the material of the front body 101 may be plastic, and/or the material of the rear body 100 may be plastic, and the plastic may be engineering plastic, so that the weight of the drill chuck is light and the manufacturing cost is low; in addition, The material of the front body 101 may also be metal, and/or the material of the rear body 100 may be metal, that is to say, the material of the front body 101 may be metal or plastic, and the material of the rear body 100 may be metal or plastic. (2) The clamping direction of the switch sleeve 200 is the same as the reverse direction of the drill chuck, and the loosening direction of the switch sleeve 200 is the same as the forward rotation direction of the drill chuck.

In this embodiment, the drill chuck and the rear body 100 rotate forward, and the clamping jaw 102 can clamp the drilling tool, and the rear body 100 reverses, which can realize the release of the clamping jaw 102 on the drilling tool. 100 is rotating forward to achieve normal forward rotation after the clamping jaw 102 clamps the drilling tool. At this time, the rear body 100 and the front body 101 rotate forward together; when the clamping jaw 102 clamps the drilling tool, After the rear body 100 and the front body 101 are joined by the clutch mechanism, the clutch body realizes a relatively stationary fixed connection state between the rear body 100 and the front body 101, that is, the rear body 100 and the front body 101 are reversed together, thereby passing The clutch mechanism realizes the bidirectional rotation of the drill chuck to drive the drill to perform bidirectional work, and the user experience is better.

In an optional solution of this embodiment, the front body 101 is provided with a gripper slideway 103, the gripper 102 is provided in the gripper slideway 103, and the gripper 102 can move along the guide direction of the gripper slideway 103; One direction is parallel to the guiding direction of the jaw slide 103.

Specifically, the number of the jaws 102 is equal to the number of the jaw slides 103; the number of the jaw slides 103 is multiple, and the multiple jaw slides 103 are evenly arranged around the circumference of the precursor 101; the jaws 102 The jaw slide 103 can only move along the guide direction of the jaw slide 103, and the jaw 102 cannot rotate around its own longitudinal axis. A rotation stop can be set between the jaw 102 and the jaw slide 103 The structure is used to prevent the rotation of the clamping jaws 102. The rotation stop structure can be implemented by a limit groove and a limit slider. The limit slider can be a trapezoidal block, a T block, or a pin 104. The limit groove can be opened on the jaw slide 103, and the extending direction of the limit groove is consistent with the guiding direction of the jaw slide 103, and the limit slider is fixed on the jaw 102; or, the limit groove can be opened On the side surface of the clamping jaw 102 in the longitudinal direction, and the extending direction of the limiting groove is consistent with the longitudinal direction of the clamping jaw 102, the limiting slider is fixed in the clamping jaw slideway 103.

The first transmission part 201 can be an integral structure with the front body 101; or the first transmission part 201 can also be fixedly connected with the front body 101; or the first transmission part 201 can also be detachably connected with the front body 101, and the first transmission part 201 and the precursor 101 can rotate synchronously. The second transmission part 202 and the rear body 100 can rotate synchronously. The first transmission part 201 cooperates with the second transmission part 202 to engage or disconnect the rear body 100 and the front body 101. Through the axial displacement of the second transmission part 202 relative to the rear body 100 and facilitating the contact or separation between the first transmission part 201 and the second transmission part 202.

In an optional solution of this embodiment, the drill chuck further includes a driven bevel gear 105, which is disposed in the gear receiving hole 106 of the front body 101; the driven bevel gear 105 is sleeved on the clamping jaw 102 , And the driven bevel gear 105 and the clamping jaw 102 are driven by threads; the front end 115 of the rear body 100 is fixed with a driving bevel gear 108, and the rear body 100 is inserted in the axial receiving hole 107 of the front body 101, the driving bevel gear 108 meshes with the driven bevel gear 105.

Specifically, the number of driven bevel gears 105 is equal to the number of clamping jaws 102, and each driven bevel gear 105 corresponds to one clamping jaw 102; the gear accommodating hole 106 on the front body 101 accommodates along the axial direction of the front body 101 The mounting holes 107 are evenly distributed in the circumferential direction; after the driven bevel gear 105 is installed in the gear accommodating hole 106 of the front body 101, the clamping jaw 102 is set in the clamping jaw slideway 103, and the clamping jaw 102 passes through the driven bevel gear 105 In the wheel hole, the driven bevel gear 105 has an internal thread in the wheel hole, and the clamping jaw 102 has an external thread 109 that matches the internal thread in the wheel hole of the driven bevel gear 105; the front end 115 of the rear body 100 is active The bevel gear 108 is integrally connected with the rear body 100; when the rear body 100 rotates, the driving bevel gear 108 is rotated, the driving bevel gear 108 is rotated, the driven bevel gear 105 is rotated, and the driven bevel gear 105 is rotated to drive the jaw 102 along The guiding direction of the clamping jaw slideway 103 moves, so that the clamping jaws 102 clamp and loosen the drilling tool. The internal thread in the wheel hole of the driven bevel gear 105 and the external thread 109 on the jaw 102 that cooperates with the internal thread in the wheel hole of the driven bevel gear 105 are both multi-start threads.

In an optional solution of this embodiment, the first transmission part 201 is fixed to the end surface of the rear end 116 of the front body 101, and is configured to limit the rear body 100 to the axial receiving hole 107 of the front body 101.

Specifically, the first transmission part 201 is fixed to the end surface of the rear end 116 of the front body 101 by screws 111; the rear end 116 of the rear body 100 passes through the shaft hole of the first transmission part 201, and the axial direction of the rear body 100 The diameter of the limiting portion 112 is larger than the diameter of the shaft hole of the first transmission portion 201, so that the first transmission portion 201 can prevent the rear body 100 from falling out of the axial receiving hole 107 of the front body 101; The position 112 is located between the two ends of the rear body 100.

It should be noted that in this embodiment, the front refers to the direction in which the drilling tool mounting end of the drill chuck is located, and the rear of the drilling chuck refers to the mounting end of the external chuck opposite to the drilling tool mounting end Direction. With reference to FIG. 8, the front end 115 refers to the location of the drilling tool installation end on the drill chuck, and the rear end 116 refers to the location of the external equipment installation end of the drill chuck opposite to the drilling tool installation end.

In an optional solution of this embodiment, the axial accommodating hole 107 of the front body 101 is a stepped hole, and the portion 113 with a large hole diameter of the stepped hole is close to the rear end 116 of the front body 101, and the portion 114 with a small hole diameter of the stepped hole is away The rear end 116 of the precursor 101.

In an optional solution of this embodiment, the shaft hole of the second transmission part 202 is a waist-round hole 213, and the cross-section of the rear end of the rear body 100 is a waist circle, so that the rear end of the rear body 100 passes through the second transmission part 202 After the waist-round hole 213, the rear body 100 and the second transmission portion 202 are relatively fixed in the radial direction, and can be displaced in the axial direction. It should be noted that the rear body 100 and the second transmission part 202 can also be connected by splines to achieve relative fixation of the rear body 100 and the second transmission part 202 in the radial direction of the rear body 100, while the shaft Displacement can occur in the direction.

With reference to FIG. 10, in an optional solution of this embodiment, the drill chuck further includes a front sleeve 119 and a rear sleeve 121; the front sleeve 119 is sleeved on the front end 115 of the front body 101, and the front sleeve 119 and the front body 101 can be threaded, etc. The connection is fixed in other ways to enhance the strength of the front end 115 of the precursor 101. The front cover 119 may also be an integral structure with the front body 101, or the front cover 119 may also be fixedly connected to the front body 101 through an interference fit.

The switch sleeve 200 is set on the front body 101. Specifically, the switch sleeve 200 is sleeved on the rear end 116 of the front body 101; the switch sleeve 200 is axially limited on the front body 101, so as to ensure that when the switch sleeve 200 rotates, the contacts 204 can act on the raised elastic piece 209, that is, the contact 204 can make the raised elastic piece 209 be pushed down or pushed up.

With reference to FIG. 12, in an optional solution of this embodiment, a limit groove 214 is formed on the front body 101, which is configured to limit the rotation angle of the switch sleeve 200 on the front body 101.

Specifically, the front surface of the front body 101 is provided with a limiting groove 214 for accommodating the connecting rod 205. The width of the limiting groove 214 is greater than the width of the connecting rod 205, so that the switch sleeve 200 can drive the front body 101 Rotating around the axis of the rear body 100 ensures that the contact 204 can effectively control the tilting spring piece 209, and ensure that the tilting spring piece 209 can effectively make the first transmission part 201 and the second transmission part 202 fully integrated or completely separated . With reference to FIG. 7, the rear cover 121 includes a cover body 122 and a cover 123. The cover 122 and the cover 123 may be an integral structure. The cover 123 and the rear body 100 are connected by a key. The rear body 100 also has an axial threaded hole 124 or a tapered hole, which is configured to be connected to an external device. In use, the rear body 121 can be rotated by rotating the rear cover 121. The limit groove 214 and the connecting rod 205 on the switch sleeve 200 rotate to cooperate, so that the switch sleeve 200 can only rotate in a limited radial direction on the front body 101 (that is, the rotation angle of the switch sleeve 200 is fixed, and the rotation angle is less than 90 degrees. (More than 0 degrees), when the switch sleeve 200 rotates to one of the two opposite groove edges of the limit groove 214, it will drive the front body 101 to rotate synchronously, and the front body 101 and the rear sleeve 121 drive the rear The body 100 rotates toward each other to realize the initial clamping or loosening function of the self-tightening drill chuck to the drilling tool.

It should be noted that the switch sleeve 200 can also be screwed to the front body 101, so that the switch sleeve 200 can move a certain displacement on the front body 101, and the rotation of the switch sleeve 200 can also cause the contact 204 to lift up against the warped elastic piece 209 Function, the program is also within the scope of protection of this application.

10, in an alternative solution of this embodiment, the inner wall of the switch sleeve 200 has a first limit step 219, and the front body 101 has a second limit step 220 (combined with FIG. 7), the switch sleeve 200 is sleeved After being on the front body 101, the step surface of the first limiting step 219 and the step surface of the second limiting step 220 can be in contact, so as to prevent the switch sleeve 200 from moving the front end 115 of the front body 101. In order to prevent the switch sleeve 200 from moving further to the rear end of the front body 101, a third limit step 221 can be provided on the outer wall of the switch sleeve 200, and the axial end surface of the rear sleeve 121 can abut on the third limit step 221 In the above, since the rear sleeve 121 is fixedly connected to the rear body 100, the switch sleeve 200 can be prevented from moving to the rear end of the front body 101, thereby achieving the axial limitation of the switch sleeve 200 on the front body 101. It should be noted that, in order to prevent the switch sleeve 200 from moving further to the rear end of the front body 101, a limit pin may be installed on the front body 101. The limit pin is located on the rotating portion 203 of the switch sleeve 200 and is connected to the connecting rod 205 Side.

In an optional solution of this embodiment, the tooth shapes of the first end face tooth 206 and the second end face tooth 207 are obtuse triangles, or isosceles triangles. When they are obtuse triangles, that is, the teeth are ratchets. When both the first end face tooth 206 and the second end face tooth 207 are ratchet teeth, when the rear body 100 rotates forward, even when the first end face tooth 206 contacts the second end face tooth 207, the rear body 100 can still contact the front body 101 Relative rotation, that is, the ratchet teeth between the two end teeth will not play a role in stopping rotation, and when the rear body 100 is reversed, the ratchet teeth between the first end tooth 206 and the second end tooth 207 will play The anti-rotation action reverses the rear body 100 together with the front body 101.

In an optional solution of this embodiment, the return elastic member 216 is located between the second transmission portion 202 and the cover 123 of the rear cover 121.

Referring to FIGS. 14 to 21, an embodiment of the present disclosure further provides a drill chuck, which includes a front body 101, a rear body 100, a clamping jaw 102, and the above-mentioned switch device; the rear body 100 can be relative to the front body 101 It rotates, and the rear body 100 is configured to drive the gripper 102 to move in the first direction; the first transmission part 201 is connected to the front body 101, and the second transmission part 202 is connected to the rear body 100. The drill chuck may be an internally threaded self-tightening drill chuck or a flat-jaw self-tightening drill chuck. 14, 15, 18 and 19 adopt the switching device in FIG. 1; FIGS. 16, 17, 20 and 21 adopt the switching device shown in FIG. 2. The drill chucks in FIGS. 14, 15, 16, and 17 are flat-jaw self-tightening drill chucks; the drill chucks in FIGS. 18, 19, 20, and 21 are internally threaded self-tightening drill chucks.

In the optional solution of this embodiment, referring to FIG. 14, the rear body 100 includes a driving part 217 and an external part 218, the second transmission part 202 is connected to the external part 218 of the rear body 100, and the external part 218 and the second transmission part 202 is relatively fixed in the radial direction of the circumscribed portion 218, and can be displaced in the axial direction of the circumscribed portion 218.

In an optional solution of this embodiment, the driving part 217 is connected to the external part 218, and the driving part 217 has a screw structure.

In this embodiment, the driving portion 217 can move the jaw 102 by using at least the following two solutions:

The first scheme: referring to FIGS. 18, 19, 20 and 21, the driving part 217 is screwed with the clamping jaw 102 through a screw structure to move the clamping jaw 102 in the first direction; specifically, the driving part 217 is The external portion 218 may be an integral structure. The screw structure is an external thread provided at the front end of the driving portion 217. A side surface of the clamping jaw 102 is provided with an internal thread that matches the external thread at the front end of the driving portion 217.

Second scheme: referring to FIGS. 14, 15, 16 and 17, the driving part 217 is screw-driven with a connecting member connected to the clamping jaw 102 through a screw structure, so that the clamping jaw 102 is along the first direction Move; specifically, the connecting piece is the screw 222; the screw structure is an internal thread provided in the axial hole of the driving portion 217; the clamping jaw 102 is installed in the T-shaped slot on the end surface of the front end of the screw 222, and the screw 222 passes through It is provided in the axial hole of the driving part 217, and the rear end of the screw 222 has an external screw thread that matches with the internal thread in the axial hole of the driving part 217, and the driving part 217 and the external part 218 are detachably connected.

An embodiment of the present disclosure also provides a method for bidirectional rotation of a drill chuck. The drill chuck is the drill chuck in the above embodiment. The method includes: installing a clutch mechanism between the front body 101 and the rear body 100, wherein , The first transmission part 201 of the clutch mechanism is connected to the front body 101, and the second transmission part 202 of the clutch mechanism is connected to the rear body 100, through the engagement or disconnection between the first transmission part 201 and the second transmission part 202 The front body 101 and the rear body 100 can be engaged or disconnected accordingly; a switch sleeve 200 is installed on the front body 101, and by rotating the switch sleeve 200, the first transmission part 201 and the second transmission part 202 are connected to each other. Engage or disconnect.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, but not to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features thereof may be equivalently replaced; and these modifications or replacements do not deviate from the essence of the corresponding technical solutions of the technical solutions of the embodiments of the present disclosure range. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Industrial applicability:

In summary, the present disclosure provides a switch device, a drill chuck, and a method for bidirectional rotation of the drill chuck. The switch device and the drill chuck have simple structures, low cost, and convenient use.

Claims

A switching device, characterized in that it includes a switch sleeve and a clutch mechanism; the clutch mechanism includes a first transmission portion and a second transmission portion, the first transmission portion is configured to be connected to the front body of the drill chuck. The second transmission part is configured to be connected to the rear body of the drill chuck, and the engagement or disconnection between the first transmission part and the second transmission part can correspondingly make the front body and the rear body Engagement or disconnection; the switch sleeve can engage or disconnect the first transmission part and the second transmission part through its own rotation.
The switch device according to claim 1, wherein the first transmission part is a front engaging element, and the end face of the front engaging element has a first end face tooth; the second transmission part is a rear engaging element, The end face of the rear joint has a second end face tooth, and the first end face tooth can mesh with the second end face tooth; the first end face tooth can mesh with the second end face tooth to realize the first A transmission part is engaged with the second transmission part, and the separation of the first end face tooth and the second end face tooth can realize the disconnection between the first transmission part and the second transmission part .
The switch device according to claim 1 or 2, wherein the switch device further comprises an elastic fitting, and rotation of the switch sleeve can deform the elastic fitting so that the first transmission part and the The second transmission parts can be engaged or disconnected.
The switch device according to claim 3, wherein the switch sleeve includes a rotating part and at least one contact, the contact is connected to the rotating part, and the rotation of the rotating part enables the contact The head applies force to the elastic fitting to deform the elastic fitting.
The switch device according to claim 4, wherein the elastic fitting includes a warped spring piece; the rotation of the switch sleeve causes the contact to press down the warped spring piece to make the first transmission And the second transmission part can be engaged.
The switch device according to claim 5, wherein a positioning protrusion is installed on a surface of the warped elastic piece, and the positioning protrusion is configured to cooperate with a positioning socket on a lower surface of the contact.
The switch device according to claim 4, characterized in that the elastic fitting includes a warped elastic piece; the rotation of the switch sleeve causes the contact to lift the warped elastic piece to make the first transmission The second transmission part can be disconnected.
The switch device according to any one of claims 5-7, wherein the elastic fitting includes a ring-shaped portion, the number of the raised elastic pieces is plural, and the number of the raised elastic pieces is The number of contacts is equal, one of the contacts corresponds to one of the raised elastic pieces; a plurality of the raised elastic pieces are evenly distributed along the outer periphery of the ring-shaped portion, and the length direction of the raised elastic pieces is The ring portion has an angle between the ring surfaces.
The switch device according to any one of claims 1-8, wherein the switch device further includes a return elastic member configured to be disposed between the first transmission part and the second transmission part When disconnected, the first transmission part and the second transmission part have a tendency to move toward each other.
A drill chuck, characterized in that it includes a front body, a rear body, a clamping jaw and the switch device according to any one of claims 1-9; the rear body can rotate relative to the front body, and The rear body is configured to drive the jaw to move in a first direction; the first transmission part is connected to the front body, and the second transmission part is connected to the rear body.
The drill chuck according to claim 10, wherein the front body is provided with a clamping jaw slideway, the clamping jaw is provided in the clamping jaw slideway, and the clamping jaw can be along the clamp The guide direction of the claw slide moves; the first direction is parallel to the guide direction of the jaw slide.
The drill chuck according to claim 10 or 11, wherein the drill chuck further comprises a driven bevel gear, the driven bevel gear is disposed in a gear accommodating hole of the precursor; The driven bevel gear is sleeved on the clamping jaw, and the driven bevel gear and the clamping jaw are driven by threads;

The front end of the rear body is fixed with a driving bevel gear, and the rear body is inserted in the axial receiving hole of the front body, and the driving bevel gear is meshed with the driven bevel gear.
The drill chuck according to any one of claims 10-12, wherein the rear body includes a driving portion and an external portion, the driving portion is connected to the external portion, and the driving portion has a thread structure;

The driving part is screw-driven with the clamping jaws through the thread structure to move the clamping jaws in the first direction;

Or, the driving part is screw-driven with the connecting member connected to the clamping jaw through the screw structure, so that the clamping jaw moves in the first direction.
The drill chuck according to any one of claims 10-13, wherein the switch is sleeved on the front body, and a limited groove is opened on the front body, configured to limit the The switch sleeve rotates on the front body at an angle.
The drill chuck according to any one of claims 10 to 14, wherein the inner wall of the switch sleeve has a first limit step, and the front body has a second limit step, the switch The sleeve is disposed on the front body, and the step surface of the first limiting step and the step surface of the second limiting step may be in contact to prevent the switch sleeve from moving toward the front end of the front body.
A method for bidirectional rotation of a drill chuck. The drill chuck includes a front body and a rear body. The method is characterized in that the method includes:

A clutch mechanism is installed between the front body and the rear body, wherein the first transmission portion of the clutch mechanism is connected to the front body, and the second transmission portion of the clutch mechanism is connected to the rear body by The engagement or disconnection between the first transmission part and the second transmission part can respectively engage or disconnect the front body and the rear body;

A switch sleeve is installed on the front body, and the switch sleeve is rotated to engage or disconnect the first transmission part and the second transmission part.