TWM567677U - High/low pressure brake oil path structure for machine tool - Google Patents

Abstract

A high-low pressure brake oil circuit structure of a machine tool includes a brake cylinder and a brake pad; the brake cylinder includes a clamping groove, two piston chambers, two pistons, a first oil passage and a second oil passage, wherein the two piston chambers Respectively recessed on opposite sides of the clamping slot, the two pistons are respectively disposed in a piston chamber, and a first oil chamber and a second oil chamber are formed in the piston chamber disposed therein, and the first oil chamber and the first oil chamber The second oil chamber is not connected; the first oil passage is disposed in the hydraulic cylinder and communicates with the first oil chamber of the two piston chambers, the second oil passage is disposed in the hydraulic cylinder, and the two piston chambers The second oil chamber is connected, and the first oil pressure thrust formed by the brake fluid from the first oil passage into the first oil chamber of each piston chamber is greater than the brake oil formed from the second oil passage into the second oil chamber of each piston chamber. The second hydraulic thrust.

Description

Tool machine high and low pressure brake oil circuit structure

The invention relates to a brake structure of a machine tool, in particular to a brake structure with a high and low pressure brake oil circuit.

The existing turning and milling combined machining machine tool mainly uses a rotatable spindle to hold the workpiece to rotate, and performs workpiece turning, drilling, tapping and milling. When the workpiece needs to be drilled and tapped, it is necessary to use the high-pressure oil passage of the brake to stably hold the spindle holding the workpiece for drilling and tapping.

However, when performing the milling operation of the composite machining, the spindle holding the workpiece needs to cooperate with the axial movement of the milling cutter, and at the same time, the slow reciprocating rotary motion is performed to facilitate the milling of the milling tool on the surface of the workpiece by curve or straight line. Machining, such as engraving text on the surface of the workpiece, pattern lines, etc.; for this special processing, the spindle of the machine tool needs smooth and slow rotation to perform better curved or straight milling operations. However, existing machining The brakes of the machine are only a single brake oil circuit and cannot provide a stable clamping force, and the spindle of the machine tool can be smoothly and slowly rotated, which is less desirable.

In view of this, the main purpose of the present invention is to provide a brake oil passage structure of the machine tool, so that the clamping force formed by the brake device of the machine tool is changed, so that the brake device can completely stop working under the spindle operation, or It is to make the spindle work under slow and steady rotation.

In order to achieve the above object, the present invention provides a high and low pressure brake oil circuit structure for a machine tool, comprising: a brake cylinder comprising opposite ends, a clamping groove, two piston chambers, two pistons, a first oil passage and a second oil passage, the clamping groove is recessed between opposite ends of the brake cylinder and forms opposite faces facing the opposite ends, and the two piston chambers are respectively recessed on opposite sides of the clamping groove, the two pistons Each of the piston chambers is linearly movably disposed in a piston chamber and connected to a return spring. Each piston defines a first oil chamber and a second oil chamber in a piston chamber disposed therein, and the first oil chamber and the second oil The first oil passage is disposed in the hydraulic cylinder, and communicates with the first oil chamber of the two piston chambers, and is connected with a first brake oil pump to allow the brake fluid to enter each piston chamber from the first oil passage. a first hydraulic pressure chamber is formed in the first oil chamber, the second oil passage is disposed in the hydraulic cylinder, and communicates with the second oil chamber of the two piston chambers, and is connected with a second brake oil pump to brake fluid From the second oil passage into the second oil chamber of each piston chamber and forming a second The hydraulic thrust is greater than the second hydraulic thrust; and a brake pad has an end edge disposed in the clamping groove of the brake cylinder.

By using the above technical means, the thrust formed by the brake fluid from the first oil passage into the first oil chamber in the two piston chambers and the thrust formed by the brake fluid entering the second oil chamber in the two piston chambers from the second oil passage The difference is that the two pistons can clamp at high pressure and completely stop the spindle rotation of the machine tool, or the two pistons can be clamped at a low pressure and the spindle of the machine tool can be rotated smoothly and slowly, and the surface of the workpiece is engraved, text, and graphic. Special processing such as waiting.

In order to understand the technical features and practical effects of the present invention in detail, and in accordance with the novel content, further detailed embodiments as illustrated in the following are described in detail below:

Referring to FIG. 1 , a first embodiment of the brake oil passage structure of the machine tool of the present invention includes a brake cylinder 10 and a brake pad 30 .

The brake cylinder 10, please refer to FIG. 2 to FIG. 4, which includes opposite ends 11, 12, a clamping slot 13, two piston chambers 14, two pistons 20, a first oil passage 15, and a second oil passage 16. The clamping groove 13 is transversely cut from one side of the brake cylinder 10 between the opposite ends 11 and 12, and forms opposite faces 131, 132 respectively facing the opposite ends 11, 12; the two piston chambers 14 are respectively recessed The opposite faces 131, 132 of the clamping slot 13 are preferably the same in the axial center of the two piston chambers 14;

The two pistons 20 are respectively linearly movably disposed in the two piston chambers 14 and respectively connected to a return spring 25, so that the pistons 20 can automatically return to the original position after displacement, and each of the pistons 20 includes a main plug. The body 21, a pair of plug bodies 22 and a clamping piece 23, wherein the clamping piece 23 is disposed at an end of the main plug body 21 close to the clamping slot 13, the secondary plug body 22 is disposed at the main plug body 21 away from the clip a first oil chamber 141 and a second oil chamber 142 are respectively formed in the piston chamber 14 provided therein, and each of the pistons 20 is located in each of the piston chambers 14, and the first oil chamber 141 is located The main plug body 21 is located near the end of the secondary plug body 22, and the second oil chamber 142 is located at the end of the secondary plug body 22 away from the main plug body 21, and the first oil chamber 141 and the second oil chamber 142 are not connected. Preferably, the cross-sectional area of the first oil chamber 141 is larger than the cross-sectional area of the second oil chamber 142, and the outer diameter of the main plug body 21 is larger than the outer diameter of the secondary plug body 22;

The first oil passage 15 is disposed in the brake cylinder 10 and communicates with the first oil chamber 141 of the two piston chambers 14 and is connected to a first brake oil pump, so that the brake fluid can enter from the first oil passage 15 The first oil chamber 141 of the piston chamber 14 forms a first hydraulic pressure thrust; the second oil passage 16 is disposed in the brake cylinder 10 and communicates with the second oil chamber 142 of the two piston chambers 14 and is connected to the first The second brake pump allows the brake fluid to enter the second oil chamber 142 of each piston chamber 14 from the second oil passage 16 and form a second hydraulic pressure thrust, and the first hydraulic pressure thrust is greater than the second hydraulic pressure thrust.

The brake pad 30 is formed in a disk shape and connected to the rotating main shaft of the machine tool, and the end edge thereof is inserted into the clamping groove 13 of the brake cylinder 10, and is formed between the opposite faces 131 and 132 of the clamping groove 13. gap.

Referring to FIG. 5, when the brake fluid enters the first oil chamber 141 of each piston chamber 14 from the first oil passage 15 and forms a first hydraulic pressure thrust, the end of the main plug body 21 of each piston 20 is pushed, so that each The piston 20 moves toward the clamping slot 13 and the clamping piece 23 of the two pistons 20 clamps the brake pad 30, and the first hydraulic pushing force pushes the clamping force formed by each piston 20 to stop the brake pad 30 from rotating. In turn, the spindle of the machine tool is stopped.

Referring to FIG. 6 , when the brake fluid enters the second oil chamber 142 of each piston chamber 14 from the second oil passage 16 and forms a second hydraulic pressure thrust, the end of the secondary plug body 22 of each piston 20 is pushed to make each The piston 20 moves toward the clamping slot 13 and causes the clamping piece 23 of the two pistons 20 to clamp the brake pad 30. Since the second hydraulic pressure thrust is smaller than the first hydraulic pressure thrust, the second hydraulic pressure thrust pushes the pistons 20 to form. The clamping force can make the brake pad 30 bear a braking force with a small clamping force and a smooth braking force, so that the spindle of the machine tool can perform a slow and smooth rotation motion, and the surface of the workpiece can be engraved, text, Special processing of graphics and so on.

In this embodiment, when the user wants to completely stop the rotation of the main shaft, in addition to allowing the brake fluid to enter the first oil passage 15 and forming a first hydraulic pressure pushing the piston 20 to clamp the brake pad 30, the brake can also be applied. The liquid enters the first oil passage 15 and the second oil passage 16 at the same time and the combined thrust of the first hydraulic thrust and the second hydraulic thrust is pushed to push the piston 20 to hold the brake pad 30 and stop the brake pad 30 from rotating.

Referring to FIG. 7 to FIG. 9 , in the second embodiment of the present invention, both pistons 20A include a main plug body 21A, a sub-plug body 22A and a clamping piece 23A, and are respectively connected with a return spring 25A. The pistons 20A are automatically returned to the original position after being displaced; the clamping piece 23A is disposed at one end of the main plug body 21A close to the clamping slot 13A, and the secondary plug body 22A is disposed at the main plug body 21A away from the clamping slot. When the pistons 20A are disposed in the piston chamber 14A of the brake cylinder 10A, a first oil chamber 141A and a second oil chamber 142A are formed in the piston chamber 14A disposed therein, and the first oil chamber is formed. 141A is located at one end of the main plug body 21A close to the auxiliary plug body 22A, and the second oil chamber 142A is located at one end of the auxiliary plug body 22A close to the main plug body 21A, and the first oil chamber 141A and the second oil chamber 142A are not connected. The first oil passage 15A is disposed in the brake cylinder 10A and communicates with the first oil chamber 141A of the two piston chambers 14A, and is connected to a first brake oil pump, so that the brake fluid can enter from the first oil passage 15A. The first oil chamber 141A of each piston chamber 14A forms a first hydraulic pressure thrust; the second oil passage 16A is disposed in the brake cylinder 10A and two The second oil chamber 142A of the piston chamber 14A is in communication and is connected to a second brake pump, so that the brake fluid can enter the second oil chamber 142A of each piston chamber 14A from the second oil passage 16A and form a second hydraulic pressure thrust. And the first hydraulic pressure thrust is greater than the second hydraulic pressure thrust.

Referring to FIG. 10, when the brake fluid enters the first oil chamber 141A of each piston chamber 14A from the first oil passage 15A and forms a first hydraulic pressure thrust, the main plug body 21A end of each piston 20A is pushed to make each The piston 20A moves toward the clamping groove 13A, and the clamping piece 23A of the two pistons 20A clamps the brake pad 30, and the first hydraulic pushing force pushes the clamping force formed by each piston 20A to stop the brake pad 30 from rotating. In turn, the spindle of the machine tool is stopped.

Referring to FIG. 11, when the brake fluid enters the second oil chamber 142A of each piston chamber 14A from the second oil passage 16A and forms a second hydraulic pressure, the secondary plug body 22A of each piston 20A is pushed close to the main plug body 21A. One end forms a second hydraulic thrust that pushes each piston 20A away from the clamping groove 13A. Therefore, when the brake fluid simultaneously enters the first oil chamber 141A of each piston chamber 14A from the first oil passage 15A and the second oil passage 16A, In the second oil chamber 142A, since the first hydraulic pressure thrust is opposite to the second hydraulic pressure thrust direction, and the first hydraulic pressure thrust is greater than the second hydraulic pressure thrust, a combination is formed toward the clamping groove 13A of the brake cylinder 10A. The thrust force causes each piston 20A to move in the direction of the clamping groove 13A, and the holding piece 23A of each piston 20A holds the brake pad 30, because the combined thrust is smaller than the first hydraulic thrust, the combined thrust pushes each piston 20A The clamping force formed can make the brake pad 30 bear a braking force with a small clamping force and a smooth braking force, so that the rotating spindle of the machine tool can rotate slowly and smoothly, and engrave lines, characters, and Special processing of graphics and so on.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any one of ordinary skill in the art may use the present invention without departing from the scope of the present invention. Equivalent embodiments of the novel modifications or modifications made by the novel disclosures, and without departing from the scope of the present invention, are still within the scope of the present invention.

10,10A‧‧‧ brake cylinder

11,11A,12,12A‧‧‧

13,13A‧‧‧ slot

131, 131A, 132, 132A‧‧‧ opposite

14,14A‧‧ ‧ piston room

141, 141A‧‧‧ first oil room

142, 142A‧‧‧ second oil room

15,15A‧‧‧First oil road

16,16A‧‧‧Second oil road

20,20A‧‧‧Pistons

21, 21A‧‧‧ main body

22,22A‧‧‧Secondary body

23,23A‧‧‧Clamping film

25,25A‧‧‧Return spring

30‧‧‧ brake pads

Figure 1 is a perspective view of the first preferred embodiment of the present invention. Figure 2 is an exploded perspective view of the first preferred embodiment of the present invention. Figure 3 is a side cross-sectional view of the first oil passage of the first preferred embodiment of the present invention. Figure 4 is a side cross-sectional view of the first preferred embodiment of the present invention. Fig. 5 is a schematic view showing the operation of the first oil passage of the first preferred embodiment of the present invention. Fig. 6 is a schematic view showing the operation of the second oil passage of the first preferred embodiment of the present invention. Figure 7 is an exploded perspective view of a second preferred embodiment of the present invention. Figure 8 is a side cross-sectional view of the first oil passage of the second preferred embodiment of the present invention. Figure 9 is a side cross-sectional view showing a second preferred embodiment of the present invention. Figure 10 is a schematic view showing the operation of the first oil passage of the second preferred embodiment of the present invention. Figure 11 is a schematic view showing the operation of the first oil passage and the second oil passage according to the second preferred embodiment of the present invention.

Claims (5)

The utility model relates to a high and low pressure brake oil circuit structure of a machine tool, comprising: a brake cylinder comprising opposite ends, a clamping groove, two piston chambers, two pistons, a first oil passage and a second oil passage, the clamping groove a recessed between the opposite ends of the brake cylinder and forming opposite faces facing the opposite ends, the piston chambers are respectively recessed on opposite sides of the clamping groove, and the two pistons are respectively linearly movable on a piston Indoors and respectively connected to a return spring, each piston forms a first oil chamber and a second oil chamber in a piston chamber disposed therein, and the first oil chamber and the second oil chamber are not connected; the first oil passage Provided in the hydraulic cylinder, and connected to the first oil chamber of the two piston chambers, and connected with a first brake oil pump to allow brake fluid to enter the first oil chamber of each piston chamber from the first oil passage and form a first a hydraulic thrust, the second oil passage is disposed in the hydraulic cylinder, and communicates with the second oil chamber of the two piston chambers, and is connected with a second brake oil pump to allow the brake fluid to enter the piston chambers from the second oil passage a second oil pressure chamber and a second oil pressure thrust, and the first oil pressure thrust is greater than a second hydraulic thrust; and a brake pad having an end edge disposed in the clamping groove of the brake cylinder. The high and low pressure brake oil circuit structure of the machine tool according to claim 1, wherein each of the pistons comprises a main plug body and a pair of plug bodies, wherein the auxiliary plug body is disposed at an end of the main plug body away from the clamping groove of the brake cylinder. And the first oil chamber of each piston chamber is formed at one end of each main plug body close to each auxiliary plug body, and the second oil chamber of each piston chamber is formed at one end of each auxiliary plug body. The high-low pressure brake oil passage structure of the power tool according to claim 2, wherein the second oil chamber of each piston chamber is formed at an end of each piston from the main plug body. The machine tool high and low pressure brake oil circuit structure according to claim 2, wherein the second oil chamber of each piston chamber is formed at an end of each of the pistons adjacent to the main plug body. The machine tool high and low pressure brake oil passage structure according to any one of claims 1 to 4, wherein each piston is provided with a clamping piece on a side close to the clamping groove.