CN210125741U

CN210125741U - Oil cylinder and spiral hydraulic chuck arranged in hydraulic station

Info

Publication number: CN210125741U
Application number: CN201921108123.1U
Authority: CN
Inventors: 赵鲁民
Original assignee: Weifang Weibao Machinery Co ltd
Current assignee: Weifang Weibao Machinery Co ltd
Priority date: 2019-07-15
Filing date: 2019-07-15
Publication date: 2020-03-06
Anticipated expiration: 2029-07-15

Abstract

The utility model relates to a chuck technical field, specifically speaking relates to a built-in spiral hydraulic chuck in hydro-cylinder and hydraulic pressure station. The chuck comprises a chuck body, wherein 2-6 radial slideways are uniformly arranged on the surface of the chuck body, and each slideway is provided with a clamping jaw assembly; and a jaw driving mechanism for driving each jaw assembly to synchronously and radially move along the slide way is arranged in the inner cavity at the bottom of the chuck main body. The utility model adopts the structure form of the hydraulic station and the oil cylinder, the axial size is small, the jaw moving stroke is large, the jaw clamping force is large, the chuck is suitable for being made into a large-size chuck, the diameter is 0.8 m at the minimum, more than 6 m can be realized at the maximum, and the rear pull type oil cylinder is removed, thereby solving the installation problem of the machine tool; the DC 12-48V low voltage power supply is adopted, and no potential safety hazard exists.

Description

Oil cylinder and spiral hydraulic chuck arranged in hydraulic station

Technical Field

The utility model relates to a chuck technical field, specifically speaking relates to a built-in spiral hydraulic chuck in hydro-cylinder and hydraulic pressure station.

Background

At present, the hydraulic chucks are mainly divided into two types: 1. the front hydraulic chuck, namely the chuck and the rotary cylinder are integrated, the oil pipe is connected from the front end, and the chuck is small in size due to the limitation of structural design; 2. the back-pull type hydraulic chuck is characterized in that the chuck is installed at the front end of a machine tool spindle, a rotary hydraulic cylinder is installed at the rear end of the machine tool spindle, an oil cylinder is pulled back to drive a wedge-shaped structural member to move backwards, the wedge-shaped structural member drives a sliding block to move towards the axis, and due to the limitation of structural design, the movable stroke of the hydraulic chuck is small, the hydraulic chuck is not suitable for being used as a large-size chuck and is generally within. In addition, an electric chuck is arranged for driving the sliding block to move towards the center for the rotation of a rear-mounted motor.

The back of the chuck structures needs to have enough installation space, the chuck structures cannot be installed if the spindle of the vertical lathe is solid, and even if the spindle of the large vertical lathe is of a hollow structure, a trench needs to be dug during installation, an installer needs to install the rear-mounted oil cylinder below the machine tool through the trench, time and labor are wasted, the later maintenance cost is high, and the working stroke of the machine tool can be greatly reduced if the bench drill is provided with the chuck structures on the table board.

In addition, in the actual work of a machine tool, when a large workpiece is clamped, a large sliding block stroke and an overlarge clamping force are needed, the stroke of a back-pull oil cylinder of a traditional wedge-shaped chuck is generally equal to that of a sliding block, if the stroke or the clamping force of the sliding block is increased on the premise of not improving the pressure of a hydraulic station, the axial size of the chuck can be increased only, the stroke of the sliding block is calculated by 20 mm, if the clamping force is increased by 10 times, the axial size of the chuck needs to be increased by 200 mm, the chuck is too thick, and the machining stroke of the machine tool is reduced.

Disclosure of Invention

An object of the utility model is to provide an hydro-cylinder and built-in spiral hydraulic chuck in hydraulic pressure station to solve above-mentioned technical problem.

In order to solve the above problems, the utility model adopts the following technical scheme:

the utility model provides a built-in spiral hydraulic chuck in hydro-cylinder and hydraulic pressure station, includes the chuck main part, its characterized in that: 2-6 radial slideways are uniformly arranged on the surface of the chuck main body, and each slideway is provided with a clamping jaw assembly; and a jaw driving mechanism for driving each jaw assembly to synchronously and radially move along the slide way is arranged in the inner cavity at the bottom of the chuck main body.

Furthermore, the jaw assembly comprises a sliding block clamped in the sliding way, a jaw seat fixed at the outer end of the sliding block and a jaw fixed on the jaw seat; the middle part of each slide way is provided with a radial stroke hole, and the bottom of each slide block is provided with 2 transmission shafts which are radially arranged; two transmission shafts of each sliding block downwards penetrate through the stroke holes of the corresponding slide ways.

The jaw driving mechanism comprises a rotating disc and at least one group of integrated hydraulic oil cylinders, wherein the rotating disc is arranged in an inner cavity at the bottom of the chuck body; the center of the rotating disk is arranged on a central shaft of the chuck main body through a bearing, 2-6 arc-shaped convex blocks are uniformly arranged on the disk surface of the rotating disk along the circumferential direction of the rotating disk, and the arc-shaped convex blocks are correspondingly clamped between 2 transmission shafts of each sliding block one by one; the integrated hydraulic oil cylinder comprises an oil cylinder and a micro hydraulic station for supplying oil to the oil cylinder; the miniature hydraulic station consists of a hydraulic oil tank, an electric motor and a gear pump; the tail of the cylinder body of the oil cylinder is hinged to the chuck main body, and the top end of a piston rod of the oil cylinder is hinged to the disc surface of the rotating disc.

Furthermore, an annular groove is formed in the outer wall of the chuck main body, an annular bakelite seat is clamped in the annular groove, and two annular leads are fixed on the bakelite seat; the outer side of the chuck main body is provided with a carbon brush support, two carbon brushes are fixed on the carbon brush support, and the two carbon brushes are respectively in contact with the two annular wires; and the positive and negative terminals of the electric motor are respectively and electrically connected with the two annular leads.

Furthermore, a digital display control table for monitoring pressure values and controlling the work of each electric motor according to the pressure values is installed in the chuck main body.

Further, an annular carbon brush protective cover is fixed on the outer wall of the chuck main body.

Has the advantages that: compared with the prior art, the hydraulic chuck of the utility model adopts the structure of the hydraulic station and the built-in oil cylinder, has small axial size, large jaw moving stroke and large jaw clamping force, is suitable for being used as a large-size chuck, has the minimum diameter of 0.8 meter and can reach more than 6 meters to the maximum extent, and removes the rear pull oil cylinder, thereby solving the installation problem of the machine tool; meanwhile, direct current 12-48V low voltage power supply is adopted, a power supply is connected into an electric motor in the chuck main body through a carbon brush support, a carbon brush and a ring-shaped conducting wire, the electric motor changes the oil supply direction through the switching of the positive electrode and the negative electrode of the direct current power supply, the oil cylinder is controlled to stretch, the oil cylinder drives the rotating disc to rotate in the positive direction and the negative direction, the sliding block is driven to move in the axis direction, and then the clamping jaws clamp or release a workpiece, so that the working efficiency.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a side view of an embodiment of the present invention;

fig. 3 is a top view of the chuck body according to the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

Example (b):

referring to fig. 1 to 3, the oil cylinder and the screw type hydraulic chuck built in the hydraulic station according to the present embodiment include a chuck body 1. 3 radial slideways 7 are uniformly arranged on the surface of the chuck body 1, and each slideway 7 is provided with a clamping jaw assembly; and a jaw driving mechanism for driving each jaw assembly to synchronously and radially move along the slide way is arranged in the inner cavity at the bottom of the chuck main body 1. Specifically, the method comprises the following steps:

the jaw assembly comprises a sliding block 8 clamped in the sliding way 7, a jaw seat 10 fixed at the outer end of the sliding block 8 and a jaw 9 fixed on the jaw seat 10; the middle part of each slide way 7 is provided with a radial stroke hole 7A, and the bottom of each slide block 8 is provided with 2 transmission shafts 11 which are radially arranged; the two transmission shafts 11 of each slide 8 extend downwards through the travel holes 7A of the corresponding slide 7.

The jaw driving mechanism comprises a rotating

disk

13 and 3 groups of integrated hydraulic oil cylinders which are arranged in an inner cavity at the bottom of the chuck body 1. The center of the rotating disk 13 is arranged on the central shaft of the chuck main body 1 through a bearing, 3 arc-shaped convex blocks 12 are uniformly arranged on the disk surface of the rotating disk along the circumferential direction of the rotating disk, and the arc-shaped convex blocks 12 are correspondingly clamped between 2 transmission shafts 11 of each sliding block 8 one by one. The integrated hydraulic oil cylinder comprises an oil cylinder 16 and a micro hydraulic station for supplying oil to the oil cylinder 16; the micro hydraulic station is composed of a hydraulic oil tank 5, an electric motor 17 and a gear pump 19. (the utility model discloses an integrated form hydraulic cylinder market sell, for prior art, no longer give unnecessary details its concrete structure and theory of operation here.) the cylinder body afterbody of hydro-cylinder 16 articulates in chuck main part 1, and the top of its piston rod articulates in the quotation of rotary disk 13.

An annular groove is formed in the outer wall of the chuck main body 1, an annular bakelite seat 18 is clamped in the annular groove, and two annular leads 4 are fixed on the bakelite seat 18; the outer side of the chuck main body 1 is provided with a carbon brush support 2, two carbon brushes 3 are fixed on the carbon brush support 2, and the two carbon brushes 3 are respectively contacted with two annular wires 4; and the positive and negative terminals of the electric motor 17 are respectively and electrically connected with the two annular leads 4. An annular carbon brush shield 6 is fixed on the outer wall of the chuck main body 1.

The hydraulic chuck described in this embodiment adopts direct current 12-48V low voltage power supply, has no potential safety hazard, places the carbon brush support 2 outside the chuck main body 1, fixes on the machine tool, makes its position fixed, can not rotate with the chuck main body 1, simultaneously, makes the carbon brush 3 touch the annular wire 4. The power supply is connected to an electric motor 17 in the chuck main body 1 through a carbon brush support 2, a carbon brush 3 and an annular lead 4, the electric motor 17 changes the oil supply direction through the positive and negative conversion of a direct current power supply, the oil cylinder 16 is controlled to stretch, the oil cylinder 16 drives the rotating disk 13 to rotate in the positive and negative directions, the convex block 12 rotates in the positive and negative directions along with the rotating disk 13, the sliding block 8 is driven to move in the radial direction through the transmission shaft 11, and then the clamping jaws 9 clamp or release a workpiece.

According to the sizes of different diameters of the chuck main body 1, the diameter of the hydraulic cylinder is generally between 60 and 100 mm, when the motor pressure is 7.1MP, the maximum thrust of the phi 60 oil cylinder is 8000N, the maximum thrust of the phi 100 oil cylinder is 24000N, and the stroke is 50 to 500 mm. When the stroke of the oil cylinder is 200 mm, the sliding block moves by 20 mm through the rotating disk, the stroke of the oil cylinder is 10 times of that of the sliding block, and 8000N multiplied by 10 times is equal to 80000N. The electric motor and the oil cylinder are horizontally arranged in the chuck body, and 1-9 electric motors are arranged according to the size of the chuck body and the required clamping force. When hydraulic chuck's rotary disk structure compares the slider stroke with traditional wedge and increases 5 times, the clamping-force still can increase more than 10 times.

The utility model discloses in, install in the chuck main part 1 and be used for monitoring the pressure value and according to the digital display control table 15 of pressure value control electric motor work. The digital display control meter 15 can display the pressure of the chuck, control the power supply of the electric motor to be switched on or off according to the set pressure, and change the clamping force of the chuck by adjusting the pressure to process different workpieces. Each electric motor 17 is of a parallel structure, the pressure of the two oil ways is monitored and controlled through the two digital display control meters 15, and the electric motors 17 only supply power during clamping and loosening actions, so that electric energy is saved, the electric motors 17 and hydraulic oil are prevented from heating, the abrasion of the electric motors 17 is reduced, the service life is prolonged, and no noise exists. If the pressure is reduced in the processing process, the digital display control table 15 can automatically switch on the power supply of the electric motor 17, and the electric motor 17 operates to supplement the pressure to the oil cylinder 16.

The technical contents not described in detail in the present invention are all known techniques.

The present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only for illustrating the principle of the present invention, without departing from the spirit and scope of the present invention, the present invention can also have various changes and improvements, and these changes and improvements all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a built-in spiral hydraulic chuck in hydro-cylinder and hydraulic pressure station, includes chuck main part (1), its characterized in that: 2-6 radial slideways (7) are uniformly arranged on the surface of the chuck main body (1), and each slideway (7) is provided with a clamping jaw assembly; and a jaw driving mechanism for driving each jaw assembly to perform synchronous radial motion along a slide way is arranged in the inner cavity at the bottom of the chuck main body (1).

2. The built-in screw-type hydraulic chuck of the oil cylinder and the hydraulic station of claim 1, wherein: the jaw assembly comprises a sliding block (8) clamped in the sliding way (7), a jaw seat (10) fixed at the outer end of the sliding block (8) and a jaw (9) fixed on the jaw seat (10); the middle part of each slide way (7) is provided with a radial stroke hole (7A), and the bottom of each slide block (8) is provided with 2 transmission shafts (11) which are radially arranged; two transmission shafts (11) of each sliding block (8) downwards penetrate through the stroke holes (7A) of the corresponding slide ways (7).

3. The built-in screw-type hydraulic chuck of the oil cylinder and the hydraulic station of claim 2, wherein: the jaw driving mechanism comprises a rotating disk (13) arranged in an inner cavity at the bottom of the chuck main body (1) and at least one group of integrated hydraulic oil cylinders; the center of the rotating disk (13) is arranged on a central shaft of the chuck main body (1) through a bearing, 2-6 arc-shaped convex blocks (12) are uniformly arranged on the disk surface of the rotating disk along the circumferential direction of the rotating disk, and the arc-shaped convex blocks (12) are correspondingly clamped between 2 transmission shafts (11) of each sliding block (8) one by one; the integrated hydraulic oil cylinder comprises an oil cylinder (16) and a micro hydraulic station for supplying oil to the oil cylinder (16); the micro hydraulic station consists of a hydraulic oil tank (5), an electric motor (17) and a gear pump (19); the tail part of the cylinder body of the oil cylinder (16) is hinged on the chuck main body (1), and the top end of the piston rod of the oil cylinder is hinged on the disc surface of the rotating disc (13).

4. The built-in screw-type hydraulic chuck of oil cylinder and hydraulic station of claim 3, wherein: an annular groove is formed in the outer wall of the chuck main body (1), an annular bakelite seat (18) is clamped in the annular groove, and two annular leads (4) are fixed on the bakelite seat (18); the outer side of the chuck main body (1) is provided with a carbon brush support (2), two carbon brushes (3) are fixed on the carbon brush support (2), and the two carbon brushes (3) are respectively in contact with two annular wires (4); and the positive and negative terminals of the electric motor (17) are respectively and electrically connected with the two annular conducting wires (4).

5. The built-in screw-type hydraulic chuck of oil cylinder and hydraulic station of claim 4, wherein: and a digital display control table (15) for monitoring pressure values and controlling the work of each electric motor according to the pressure values is installed in the chuck main body (1).

6. The built-in screw-type hydraulic chuck of oil cylinder and hydraulic station of claim 5, wherein: an annular carbon brush protective cover (6) is fixed on the outer wall of the chuck main body (1).