CN110744085A

CN110744085A - Chuck

Info

Publication number: CN110744085A
Application number: CN201911078854.0A
Authority: CN
Inventors: 王军; 钱素英; 胡颖
Original assignee: CHANGZHOU HUAEN GARMENT MACHINERY PLANT
Current assignee: CHANGZHOU HUAEN GARMENT MACHINERY PLANT
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2020-02-04

Abstract

The invention relates to a chuck, which structurally comprises a chuck body and three clamping jaws, wherein the three clamping jaws are arranged on the chuck body in a regular triangle shape, three sliding rails are arranged on the chuck body corresponding to the three clamping jaws, and the clamping jaws are movably connected on the sliding rails; the chuck body is also provided with an electric driving device and a self-protection device, and the three clamping jaws are respectively connected with the electric driving device. The clamping device can automatically clamp a workpiece through the driving of the electric cylinder, so that the working efficiency of the chuck is improved; the design has the functions of automatically detecting whether the workpiece is loosened and self-protecting, and prevents the workpiece from flying out to cause damage to surrounding devices and human bodies in the high-speed rotation process; the invention also has the advantages of simple structure, easy manufacture, energy saving, environmental protection, practicability and high efficiency.

Description

Chuck

Technical Field

The present invention relates to a chuck.

Background

The three-jaw chuck in the prior art is often clamped manually, and the clamping mode is inconvenient to operate and is easy to cause the situation of infirm clamping. If the chuck does not clamp the workpiece tightly, the workpiece is easy to fly out in the normal turning process and can cause damage to surrounding devices and human bodies, so that the design of the chuck is particularly important.

Chinese invention No. CN 203221216U discloses a three-jaw chuck, which structurally comprises a chuck body, a device for driving the chuck body to rotate, a jaw driving mechanism and a plurality of jaws driven by the jaw driving mechanism to clamp or open; the chuck body and the plurality of jaws which are driven by the jaw driving mechanism to clamp or open are two sets, the two sets of chuck bodies are coaxially arranged, and the jaw driving mechanism is one set and is connected with the two sets of jaws to synchronously drive; the two sets of chuck bodies are arranged on the frame through bearings and are connected with a device for driving the chuck bodies to rotate. Although the invention has good clamping capability, the invention has no self-protection function, but the workpiece is easy to be loosened and fly out to cause damage to the surrounding environment and personnel.

Disclosure of Invention

The technical problem to be solved by the invention is to prevent unnecessary loss caused by the fact that the tools fly out in high-speed rotation due to the loosening of the clamping jaws; a chuck is provided.

In order to solve the technical problem, the structure of the invention comprises a chuck body and three clamping jaws, wherein the three clamping jaws are arranged on the chuck body in a regular triangle shape, three slide rails are arranged on the chuck body corresponding to the three clamping jaws, and the clamping jaws are movably connected on the slide rails; the chuck body is also provided with an electric driving device and a self-protection device, and the three clamping jaws are respectively connected with the electric driving device.

Further: the electric driving device comprises an electric cylinder, an annular rack, a gear and a jaw rack, wherein the annular rack is sleeved on an output shaft of the electric cylinder, each jaw corresponds to one jaw rack and one gear respectively, the jaw rack is arranged on the back face of each jaw, the jaw rack and the gear are connected with the annular rack and the jaw rack respectively, and the jaws are connected with the electric cylinder through the matching of the gear and the rack.

And further: the self-protection device comprises a pneumatic cylinder, a coupler and a displacement sensor, wherein the pneumatic cylinder is arranged on the back of the chuck body, the coupler is connected with an output shaft of the pneumatic cylinder, a groove is formed in the inner side of the clamping jaw, and the displacement sensor is arranged in the groove.

And further: the chuck body on still be equipped with the radius calibrated scale.

By adopting the structure, the electric chuck can automatically clamp a workpiece through the driving of the electric cylinder, so that the working efficiency of the chuck is improved; the design has the functions of automatically detecting whether the workpiece is loosened and self-protecting, and prevents the workpiece from flying out to cause damage to surrounding devices and human bodies in the high-speed rotation process; the invention also has the advantages of simple structure, easy manufacture, energy saving, environmental protection, practicability and high efficiency.

Drawings

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

Fig. 1 is a schematic front structural view of the present invention.

Fig. 2 is a schematic side view of the present invention.

Fig. 3 is a schematic structural diagram of the electric driving device.

In the figure: 1 is chuck disk body, 2 is the jack catch, 3 is the slide rail, 4 is the radius calibrated scale, 5 is the recess, 6 is displacement sensor, 7 is pneumatic cylinder, 8 is the shaft coupling, 9 is electronic jar, 10 is annular rack, 11 is the gear, 12 is jack catch rack

Detailed Description

As shown in fig. 1 and 2, the chuck structurally comprises a chuck body 1 and three jaws 2, wherein the three jaws 2 are installed on the chuck body 1 in a regular triangle shape, three slide rails 3 are arranged on the chuck body 1 corresponding to the three jaws 2, and the jaws 2 are movably connected to the slide rails 3; the chuck body 1 is also provided with an electric driving device and a self-protection device, and the three clamping jaws 2 are respectively connected with the electric driving device. The electric driving device drives the three clamping jaws 2 to move along the sliding rail 3, so that the three clamping jaws 2 are used for clamping a workpiece; and when utilizing this design just the position that self-protection device can detect the work piece when processing, look over whether the work piece has appeared becoming flexible, self-protection device will start when the work piece has appeared becoming flexible, prevent that the work piece from flying out at high-speed rotatory in-process and producing the influence to surrounding environment. In addition, the electric driving device replaces a common manual driving device, so that the working efficiency of the chuck is improved.

The electric driving device shown in fig. 3 includes an electric cylinder 9, an annular rack 10, a gear 11 and a jaw rack 12, the annular rack 10 is sleeved on an output shaft of the electric cylinder 9, each jaw 2 corresponds to one jaw rack 12 and one gear 11, the jaw rack 12 is arranged on the back of the jaw 2, the jaw rack 12 and the gear 11 are connected with the annular rack 10 and the jaw rack 12, respectively, and the jaw 2 is connected with the electric cylinder 9 through the matching of the gear and the rack. This design is through electronic jar 9 drive annular rack 10 forward and is horizontal motion when pressing from both sides tight the work piece, makes gear 11 rotate under annular rack 10's effect through annular rack 10 and gear 11's cooperation, and jaw rack 12 can take place the displacement along with gear 11's rotation to it presss from both sides tightly the work piece to push away jaw 2.

The self-protection device shown in fig. 2 comprises a pneumatic cylinder 7, a coupler 8 and a displacement sensor 6, wherein the pneumatic cylinder is arranged on the back of the chuck body 1, the coupler 8 is connected with an output shaft of the pneumatic cylinder 7, a groove 5 is formed in the inner side of each jaw 2, and the displacement sensor 6 is arranged in the groove 5. When the automatic chuck device works normally, the position of a workpiece is detected through the displacement sensor 6, whether the workpiece is loosened or not is checked, after the workpiece is detected to be loosened, the pneumatic cylinder 7 can receive a signal to contract, the coupler 8 can be separated from the motor under the driving of the output shaft of the pneumatic cylinder 7, so that the chuck stops rotating, and the workpiece is prevented from flying out due to high-speed rotation to damage surrounding devices and personnel.

The chuck body 1 shown in fig. 1 is also provided with a radius scale 4. According to the invention, the feeding amount of the electric cylinder 9 is controlled according to the display of the radius dial 4, so that the workpiece can be clamped more conveniently and rapidly.

In conclusion, the electric chuck can automatically clamp a workpiece through the driving of the electric cylinder, so that the working efficiency of the chuck is improved; the design has the functions of automatically detecting whether the workpiece is loosened and self-protecting, and prevents the workpiece from flying out to cause damage to surrounding devices and human bodies in the high-speed rotation process; the invention also has the advantages of simple structure, easy manufacture, energy saving, environmental protection, practicability and high efficiency.

Claims

1. A chuck structurally comprises a chuck body (1) and three clamping jaws (2), wherein the three clamping jaws (2) are installed on the chuck body (1) in a regular triangle shape, three sliding rails (3) are arranged on the chuck body (1) corresponding to the three clamping jaws (2), and the clamping jaws (2) are movably connected to the sliding rails (3); the method is characterized in that: an electric driving device and a self-protection device are further arranged on the chuck body (1), and the three clamping jaws (2) are respectively connected with the electric driving device.

2. A chuck as claimed in claim 1, wherein: the electric driving device comprises an electric cylinder (9), an annular rack (10), a gear (11) and a jaw rack (12), wherein the annular rack (10) is sleeved on an output shaft of the electric cylinder (9), each jaw (2) corresponds to one jaw rack (12) and one gear (11) respectively, the jaw rack (12) is arranged on the back face of each jaw (2), the jaw racks (12) and the gears (11) are connected with the annular rack (10) and the jaw racks (12) respectively, and the jaws (2) are connected with the electric cylinder (9) through the matching of the gear racks.

3. A chuck as claimed in claim 1, wherein: the self-protection device comprises a pneumatic cylinder (7), a coupler (8) and a displacement sensor (6), wherein the pneumatic cylinder is arranged on the back of the chuck body (1), the coupler (8) is connected with an output shaft of the pneumatic cylinder (7), a groove (5) is formed in the inner side of the jaw (2), and the displacement sensor (6) is arranged in the groove (5).

4. A chuck as claimed in claim 1, wherein: the chuck body (1) is also provided with a radius dial (4).