TW201822923A - Hydraulic driving device for a machine tool chuck comprising a chuck connecting seat, an oil dividing valve, and a piston - Google Patents

Abstract

A hydraulic driving device for a machine tool chuck, which comprises a chuck connecting seat, an oil dividing valve and a piston, wherein an oil storage space and a shaft hole communicating with the oil storage space are provided in the chuck connecting seat. The oil dividing valve is provided with a valve body and an oil-dividing shaft, wherein the valve body communicates with an external pressure fluid, the oil-dividing shaft disposed through the shaft hole of the chuck connecting seat, and guides the pressure fluid to the oil storage space. The piston is movably disposed in the oil storage space of the chuck connecting seat so that the piston divides the oil storage space into a first chamber and a second chamber. When oil pressures are reciprocally generated in the first chamber or the second chamber, relative displacement may occur between the piston or the chuck connecting seat, thereby allowing the piston or the chuck connecting seat to drive the machine tool chuck.

Description

Hydraulic drive for machine tool chuck

The invention relates to a machine tool, in particular to a hydraulic driving device for a machine tool chuck.

The so-called hydraulic chuck is mainly driven by a hydraulic driving device to reciprocally displace a plurality of clamping jaws along a chute, so that these clamping jaws collectively clamp a workpiece to be processed. However, as far as the conventional hydraulic driving device is concerned, it has nothing more than problems such as large volume, troublesome installation and complicated pipelines, so it is not convenient in actual operation and needs to be improved.

The main object of the present invention is to provide a hydraulic driving device for a machine tool chuck, which has a simple structure and easy operation, and can effectively reduce the volume.

In order to achieve the above object, the hydraulic driving device for a machine tool chuck provided by the present invention includes a chuck connection seat, an oil separator valve, and a piston. The chuck connection seat has an oil storage space and a connection A shaft hole through the oil storage space; the oil separating valve has a valve body and an oil separating shaft, the valve body communicates external pressure fluid, and the oil separating shaft passes through the shaft hole of the chuck connection seat and the valve body And the pressure fluid is guided to the oil storage space, the piston is arranged in the oil storage space of the chuck connection seat, so that the oil storage space is divided into a first chamber and a second chamber; The fluid can be reciprocally generated in the first chamber or the second chamber, and the piston or the chuck connection seat can be relatively displaced, so that the piston or the chuck connection seat drives the machine tool chuck.

According to the technical features provided by the present invention, the oil separator valve has a valve body and an oil separator shaft, the valve body has a first oil inlet, a second oil inlet, and an oil return shaft, and the oil separator shaft One end passes through the shaft hole of the chuck connection seat and is connected to the chuck connection seat. The other end of the oil separating shaft is rotatably connected to the valve body, so that the oil separating shaft can drive the oil separating shaft. The chuck connection base rotates together; the piston unit has a piston and a piston guide rod, and the piston is arranged in the oil storage space of the chuck connection base and can be displaced along the axial direction of the shaft hole of the chuck connection base, The piston divides the oil storage space of the chuck connection seat into a first chamber and a second chamber, and the piston guide rod is axially displaceable through the oil separating shaft of the oil separating valve. The piston One end of the guide rod is connected to the piston to drive the piston to move in the oil storage space, and the other end of the piston guide rod is connected to the oil separation shaft of the oil separation valve, so that the piston guide rod is connected to the oil separation valve. Forming a first oil-conducting channel and a second oil-conducting channel, the first and second oil-conducting channels communicating with the The oil return port of the valve body of the oil valve, one end of the first oil guiding channel is connected to the first chamber of the oil storage space of the chuck connection seat, and the other end of the first oil guiding channel is connected to the valve of the oil separating valve. The first oil inlet of the body, one end of the second oil guide channel communicates with the second chamber of the oil storage space of the chuck connection seat, and the other end of the second oil guide channel communicates with the valve body of the oil separation valve Second oil inlet.

It can be known from the above that the hydraulic driving device of the present invention uses the flow of pressure fluid in the first and second chambers, so that one of the piston or the chuck connection seat can be in the first and second of the oil storage space. Displacement occurs between the chambers, thereby achieving the effect of hydraulic driving.

The detailed structure, characteristics, assembly or usage of the hydraulic drive device provided by the present invention will be described in the detailed description of the subsequent embodiments. However, those having ordinary knowledge in the field of the present invention should understand that the detailed descriptions and the specific embodiments listed in the implementation of the present invention are only used to illustrate the present invention, and are not intended to limit the scope of the patent application of the present invention.

Please refer to FIGS. 1 to 3 first. The chuck 10 shown in the figure mainly includes a clamping base 12 and three clamping jaws 14. The three clamping jaws 14 are arranged radially on one end face of the clamping base 12, and can Driven by a clamping claw drive shaft 16, they approach or move away from each other for clamping or releasing a workpiece to be processed (not shown). Since the aforementioned chuck 10 is a conventional technique, in order to save space, the applicant will not repeat its detailed structure and operating principle here.

Please refer to FIGS. 2 to 4 again, the hydraulic driving device 20 of the present invention includes a chuck connection seat 30, an oil separating valve 40, and a piston unit 50.

The chuck connection base 30 is fixed to one end surface of the chuck base 12 facing away from each of the clamping jaws 14 by a plurality of fixing members 18 (as shown in FIGS. 3 and 4). The chuck connection base 30 has a base 31 and a cover plate 32. The cover plate 32 is disposed on an end surface of the base body 31 facing the clamp base 12 to form an oil storage space 33 between the clamp base 12 (as shown in FIGS. 2 and 4). (Shown), the oil storage space 33 is used to store a pressure fluid, the other opposite end surface of the base 31 has a first shaft hole 34 connected to the oil storage space 33, and the cover plate 32 has a first二 轴 孔 35。 Two shaft holes 35.

The oil separator valve 40 has a valve body 41 and an oil separator shaft 45. The valve body 41 has a first oil inlet 42, a second oil inlet 43 and an oil return port 44. One end of the oil separation shaft 45 is rotatably passed through the valve body 41, and the end surface of the valve body 41 is recessed. The oil dividing shaft 45 is provided on the valve body 41 through a recessed end surface of the valve body 41 through a bearing 48 and a bearing support seat 49. The oil dividing shaft 45 has a first radial perforation 46 (such as (Shown in FIG. 5) and a second radial perforation 47 (shown in FIG. 4), the other end of the oil separation shaft 45 is penetrated in the first shaft hole 34 of the chuck connection seat 30 and is connected to the chuck connection seat 30 are connected together (as shown in Figs. 2 to 4), so that the oil separation shaft 45 can drive the chuck connection base 30 to rotate under the driving force of a power source (not shown), and the chuck connection base 30 rotates During the process, the chuck 10 will be driven to rotate together.

The piston unit 50 has a piston 51 and a piston guide 55. The piston 51 has a disc portion 52, which is disposed in the oil storage space 33 of the chuck connection seat 30, and divides the oil storage space 33 into a first chamber 36 and a second chamber 37, as in the fourth and the fourth chambers. As shown in FIG. 5, the disk portion 52 has two oil guide holes 53 opposite to each other, and the two oil guide holes 53 respectively communicate with the first chamber 36 of the oil storage space 33. In addition, the piston 51 has a sleeve shaft connected to the disk portion 52. 54. The socket shaft 54 passes through the second shaft hole 35 of the cover plate 32 of the chuck connection base 30 and is sleeved on the jaw driving shaft 16 (as shown in Figs. 4 and 5), so that the piston 51 can move The jaw drive shaft 16 operates together; the piston guide 55 passes through the oil-separating shaft of the oil-separating valve 40 and has an inner pipe 56 and an outer pipe 57. As shown in FIGS. 4 and 5, one end of the inner pipe 56 It is connected to the oil separation shaft 45. One end of the outer tube 57 is sleeved on the other end of the inner tube 56 so as to be axially movable. The other end of the outer tube 57 is connected to the disk portion 52 of the piston 51 and has two opposite third radial directions. The perforations 58 and the two third radial perforations 58 communicate with the oil guide holes 53 of the disc portion 52 of the piston 51, respectively. Thereby, the inside of the inner pipe 56 and the inside of the outer pipe 57 are connected to each other to form a first oil guide passage 59, and a second between the outer peripheral surface of the inner pipe 56 and the outer peripheral surface of the outer pipe 57 and the oil dividing shaft 45 is formed. The oil guide passage 60, as shown in FIGS. 4 and 5, one end of the first oil guide passage 59 communicates with the first oil inlet 42 of the oil separator valve 40 through the first radial perforation 46 of the oil separator shaft 45, The other end of the first oil guide passage 59 communicates with the oil guide hole 53 of the disc portion 52 of the piston 51 through the third radial perforation 58 of the outer pipe 57 to the first chamber 36 of the oil storage space 33. In addition, the second guide One end of the oil passage 60 is communicated to the second oil inlet 43 of the oil separation valve 40 through the second radial perforation 47 of the oil separation shaft 45, and the other end of the second oil passage 60 is directly connected to the second of the oil storage space 33 Cavity 37.

It can be known from the above structure that when the pressure fluid flows from the first oil inlet 42 of the oil separation valve 40 into the first oil guide passage 59, the pressure fluid will flow into the first chamber 36 of the oil storage space 33 along the first oil passage 59 Inside, when the pressure fluid accumulates to a certain volume in the first chamber 36, the piston 51 is pushed in the direction of the second chamber 37, as shown in FIG. 5, after the piston 51 is pushed to the second chamber During the process of the chamber 37, the jaw driving shaft 16 is simultaneously pulled, so that the jaw driving shaft 16 further drives the jaws 14 away from each other. At this time, the pressure fluid originally in the second chamber 37 will pass through the oil separator valve 40. The oil return port 44 is discharged out of the oil separation valve 40 for backflow.

On the other hand, after the pressure fluid flows from the second oil inlet 43 of the oil separation valve 40 into the second oil guide passage 60, the pressure fluid flows into the second chamber 37 of the oil storage space 33 along the second oil guide passage 60 After the pressure fluid has accumulated to a certain volume in the second chamber 37, the piston 51 will be pushed in the direction of the first chamber 36, as shown in FIG. 4, after the piston 51 is pushed to the first chamber During the process of 36, the jaw driving shaft 16 is pushed at the same time, so that the jaw driving shaft 16 further drives the jaws 14 to approach each other, and at this time, the pressure fluid originally in the first chamber 36 will return through the oil separator valve 40 The oil port 44 is discharged out of the oil separation valve 40 for backflow.

Please refer to FIG. 6 to FIG. 8 again. The constituent components of the hydraulic drive device 70 provided by another preferred embodiment of the present invention are the same as those of the foregoing preferred embodiment, and are characterized in that the chuck connection seat 72 has a The moving plunger 74 and the oil storage space 76 formed inside the plunger 74 can move the jaw 77 when the plunger 74 moves. The piston 82 is also provided in the oil storage space 76 of the plunger 74 of the chuck connection seat 72. The oil separation shaft 80 of the oil separation valve 78 is penetrated in the chuck connection seat 72 and guides the pressure fluid to the oil storage space 76. The piston 82 Relative displacement with the plunger 74, when the pressure fluid is reciprocally generated in the first chamber 84 or the second chamber 86, the plunger 74 can be displaced relative to the piston 82, so that the plunger 74 drives the jaw 77 .

As shown in FIG. 9 and FIG. 10, the constituent components of the hydraulic drive device 90 provided by another preferred embodiment of the present invention are similar to those of the foregoing preferred embodiment, and are characterized by using the adapter seat 91 instead of the oil separating valve. The adapter seat 91 has two through holes 92. The adapter seat 91 is rotatably provided in the first shaft hole 95 of the chuck connection seat 94 through the bearing assembly 93 and is engaged with the piston 96. The piston 96 can move relative to the adapter seat 91. The two through holes 92 are respectively connected to the oil storage space 98 through the oil guide holes 97 of the piston 96. When pressure fluid is injected into the different through holes 92, the piston 96 can be reciprocated, thereby achieving the technical effect of driving the gripper 99.

To sum up, the hydraulic driving device of the present invention utilizes the reciprocating flow of pressure fluid in the first and second chambers, so that the plunger of the piston or the chuck connection seat can be displaced inside the oil storage space, thereby achieving the oil pressure. Compared with the conventional technology, the hydraulic driving device of the present invention has the effect of simplifying the structure, facilitating the operation, and reducing the volume.

10‧‧‧ Collet

12‧‧‧clip

14‧‧‧Jaw

16‧‧‧ jaw drive shaft

18‧‧‧Fixed parts

20‧‧‧Hydraulic drive

30‧‧‧Chuck connector

31‧‧‧ seat

32‧‧‧ Cover

33‧‧‧oil storage space

34‧‧‧First shaft hole

35‧‧‧Second shaft hole

36‧‧‧First Chamber

37‧‧‧Second Chamber

39‧‧‧seals

40‧‧‧ oil separator valve

41‧‧‧Valve body

42‧‧‧First oil inlet

43‧‧‧Second oil inlet

44‧‧‧ oil return port

45‧‧‧Split shaft

46‧‧‧First radial perforation

47‧‧‧ second radial perforation

48‧‧‧bearing

49‧‧‧bearing support

50‧‧‧Piston unit

51‧‧‧Piston

52‧‧‧ Pan Department

53‧‧‧oil guide hole

54‧‧‧ Socket shaft

55‧‧‧Piston guide

56‧‧‧Inner tube

57‧‧‧External tube

58‧‧‧ Third radial perforation

59‧‧‧first oil passage

60‧‧‧Second oil guide channel

70‧‧‧hydraulic drive

72‧‧‧ Collet Connector

74‧‧‧ plunger

76‧‧‧oil storage space

77‧‧‧Jaw

78‧‧‧ oil separator valve

80‧‧‧ oil separator shaft

82‧‧‧Piston

84‧‧‧First Chamber

86‧‧‧Second Chamber

90‧‧‧hydraulic drive

91‧‧‧ adapter

92‧‧‧through hole

93‧‧‧bearing assembly

94‧‧‧chuck connector

95‧‧‧First shaft hole

96‧‧‧ Pistons

97‧‧‧oil guide hole

98‧‧‧oil storage space

99‧‧‧Jaw

FIG. 1 is an external perspective view of a chuck of a hydraulic drive device according to the present invention. Fig. 2 is a partially exploded perspective view of a hydraulic chuck of the present invention with a chuck. Figure 3 is a partially exploded view of Figure 2 from another perspective. FIG. 4 is a sectional view of a combination of a hydraulic drive device and a chuck according to the present invention, which mainly shows that a piston is located in a first chamber of an oil storage space. Figure 5 is similar to Figure 4 and shows that the piston is located in the second chamber of the oil storage space. FIG. 6 is an exploded perspective view of another preferred embodiment of the present invention. 7 and 8 are combined sectional views of another preferred embodiment of the present invention, which mainly show the relative positions between the plunger and the piston of the chuck connection seat. FIG. 9 is an exploded perspective view of another preferred embodiment of the present invention. Fig. 10 is similar to Fig. 9 and mainly shows an exploded perspective view from another angle.

Claims (8)

An oil pressure driving device for a machine tool chuck, comprising: a chuck connection seat, which has an oil storage space inside and a shaft hole communicating with the oil storage space; an oil separating valve having a valve body and a Oil separation shaft, the valve body communicates with external pressure fluid, the oil separation shaft is penetrated through the shaft hole of the chuck connection seat, and guides the pressure fluid to the oil storage space; a piston is provided on the chuck connection seat In the oil storage space, the piston and the chuck connection seat can be relatively displaced, so that the piston can distinguish the oil storage space of the chuck connection seat into a first chamber and a second chamber; thereby, when When the pressure fluid is reciprocally generated in the first chamber or the second chamber, one of the piston or the chuck connection seat can be displaced, so that the piston or the chuck connection seat drives the machine tool. Chuck. The hydraulic drive device for a machine tool chuck according to claim 1, wherein the valve body of the oil separating valve has a first oil inlet, a second oil inlet and an oil return port, and the oil separating shaft One end is penetrated in the shaft hole of the chuck connection seat and connected with the chuck connection seat, and the other end of the oil separating shaft is rotatably penetrated in the valve body. The hydraulic driving device for a machine tool chuck as described in claim 2, further comprising a piston guide rod, the piston is arranged in the oil storage space of the chuck connection seat and can be along the chuck connection seat. The axial displacement of the shaft hole makes the piston divide the oil storage space of the chuck connection seat into the first chamber and the second chamber, and the piston guide rod is axially displaceable and penetrates the oil separation valve. In the oil separation shaft, one end of the piston guide rod is connected to the piston, and the other end of the piston guide rod is connected to the oil separation shaft of the oil separation valve, so that a first guide is formed between the piston guide rod and the oil separation valve. An oil passage and a second oil-conducting passage, the first and second oil-conducting passages respectively communicate with the oil return port of the valve body of the oil separating valve, and one end of the first oil-conducting passage communicates with the oil storage of the chuck connection seat In the first chamber of the space, the other end of the first oil passage is connected to the first oil inlet of the valve body of the oil separation valve, and one end of the second oil passage is connected to the oil storage space of the chuck connection seat. In the second chamber, the other end of the second oil-conducting channel communicates with the second oil inlet of the valve body of the oil separating valve. The hydraulic drive device for a machine tool chuck according to claim 3, wherein the piston guide has an inner tube and an outer tube, and one of the inner tubes is connected to the oil dividing shaft, and the outer tube can be shafted. It is sleeved to the other end of the inner pipe in a moving direction, and one end of the outer pipe is connected to the piston; the insides of the inner and outer pipes are connected with each other to form the first oil guide channel, The second oil guiding channel is formed between the oil separating shafts. The hydraulic driving device for a machine tool chuck according to claim 2, wherein the oil separating shaft has a first radial perforation and a second radial perforation, and the first oil guide channel passes through the first radial The perforation communicates with the first oil inlet, and the second oil guide channel communicates with the second oil inlet through the second radial perforation. The hydraulic drive device for a machine tool chuck as described in claim 4, wherein one end of the outer pipe remote from the inner pipe has a third radial perforation, the piston has an oil guiding hole, and the first oil guiding channel Connected with the oil guiding hole to the first chamber through the third radial perforation. The hydraulic drive device for a machine tool chuck as described in claim 1, wherein an end surface of the valve body is concave, and the oil dividing shaft is sequentially provided with a seal, a bearing, and a bearing support through the concave end surface. The seat is rotatably and conveniently assembled on the valve body. An oil pressure driving device for a chuck of a machine tool includes: a chuck connection seat, which has an oil storage space and a shaft hole communicating with the oil storage space; an adapter seat with two through holes respectively communicated with each other For external pressure fluid, the adapter seat is rotatably penetrated through the shaft hole of the chuck connection seat and guides the pressure fluid to the oil storage space; a piston is provided in the oil storage space of the chuck connection seat, The piston and the chuck connection seat can be relatively displaced, so that the piston can distinguish the oil storage space of the chuck connection seat into a first chamber and a second chamber; thereby, when the pressure fluid passes through different The through hole flows into the first chamber or the second chamber, and the piston is reciprocally moved to the chuck connection seat, so that the piston drives the machine tool chuck.