TWM522807U - Hydraulic clamping device of double layered piston - Google Patents

Description

Oil pressure clamping device for double piston

The utility model relates to a machine tool, in particular to a hydraulic clamping device for a double-layer piston.

As shown in FIG. 1 , a conventional gantry type automatic exchange angle head grasping and fixing device is installed around a C-axis and has a fixing base 1 , a piston member 2 mounted on the inside of the fixing base 1 , and a The piston unit 2 is linked to the clamping unit 3. When the pressure source is activated and the piston member 2 is slid relative to the fixed seat 1 , the clamping unit 3 can also be slid relative to the fixed seat 1 , and at the same time, the angled head 4 can be grasped and fixed. Or release action.

Although this automatic exchange angle head grab fixture can achieve the intended use, there are still two missing points:

1. The hydraulic clamping mechanism is mostly operated by the hydraulic pressure of the single piston body. Under the same hydraulic pressure, the smaller the cross-sectional area of the piston, the smaller the clamping force of the oil pressure generated. In order to generate a large clamping force, the cross-sectional area of the piston is relatively increased, so that not only the pressure source needs to be increased, but also the overall manufacturing cost is increased.

Second, when the piston mechanism has problems such as oil seal leakage, it is often necessary to disassemble from the outside to the inside, resulting in maintenance and trivial maintenance.

Accordingly, it is an object of the present invention to provide a hydraulic clamping device for a double-layer piston that can generate a large clamping force and can reduce costs.

Therefore, the hydraulic clamping device of the double-layer piston of the present invention comprises a fixing seat, a first piston member, a second piston member and a clamping unit. The fixing seat is disposed along an axis and includes a first cylinder chamber, a second cylinder chamber disposed along one side of the first cylinder chamber along the axis, and a first cylinder chamber and the second cylinder chamber An intermediate partition and a through hole disposed along the axis and connectable to the outside by the second cylinder chamber, the partition having a perforation disposed along the axis and communicating the first cylinder chamber and the second cylinder chamber. The first piston member includes a first piston ring slidably mounted in the first cylinder chamber along the axis and a first piston rod coupled to the first piston ring and passing through the through hole. The second piston member includes a second piston ring slidably mounted in the second cylinder chamber along the axis, and a second piston rod coupled to the second piston ring and threadable through the through hole. The second piston ring is interconnected with the first piston rod. The clamping unit is mounted in the through hole of the fixing base and includes a clamping member having a plurality of clamping jaws, the clamping jaws being swayed by the second piston rod and being generated by the axis A snap-on state approaching is operated in a released state away from the axis.

The utility model has the advantages that: the first piston member and the second piston member are connected in series along the axis, so that the same cross-sectional area can generate twice the hydraulic clamping tension, which not only reduces the cost, but also adopts modularization. Design and maintenance are quite convenient.

Referring to FIG. 2 and FIG. 3, an embodiment of the hydraulic pressure clamping device of the double-layer piston of the present invention can be mounted on the head 100 of a processing machine, and can clamp and fix a plurality of hoes 210 of an angle head 200. The oil pressure clamping device of the double piston comprises a fixing base 10, a first piston member 20, a second piston member 30 and a clamping unit 40.

The fixing base 10 is mounted on the inside of the handpiece 100, and is disposed along an axis L. The utility model is disposed on an axis L, and includes an upper body 11, a lower body 12 disposed under the upper body 11 along the axis L, and a lower body 11 disposed on the upper body 11. a partitioning member 13 between the lower seat body 12 and a first cylinder chamber 14 disposed between the upper seat body 11 and the partitioning member 13 is disposed between the partitioning member 13 and the lower seat body 12. a second cylinder chamber 15, a propulsion oil hole 16 communicating with the first cylinder chamber 14 and the second cylinder chamber 15, and a refueling oil hole 17 communicating with the first cylinder chamber 14 and the second cylinder chamber 15 . The partition member 13 is disposed between the first cylinder chamber 14 and the second cylinder chamber 15.

The lower seat body 12 has a through hole 121 which is disposed along the axis L and which can be communicated to the outside by the second cylinder chamber 15.

The partition member 13 has a perforation 131 disposed along the axis L and communicating with the first cylinder chamber 14 and the second cylinder chamber 15.

The propulsion oil hole 16 has a first oil inlet 161 disposed at the top edge of the first cylinder chamber 14 and a first oil inlet 161 disposed at the top edge of the first cylinder chamber 14 and a first edge of the second cylinder chamber 15 Two inlet ports 162.

The refilling oil hole 17 has a first oil inlet 171 disposed at the bottom edge of the first cylinder chamber 14 and disposed at the lower base 12 and at the bottom edge of the second cylinder chamber 15 The second oil inlet 172.

The first piston member 20 includes a first piston ring 21 slidably mounted in the first cylinder chamber 14 along the axis L, and a first connecting to the first piston ring 21 and passing through the through hole 131. Piston rod 22. The first oil inlet 161 and the second oil inlet 162 are respectively disposed on two sides of the first piston ring 21 along the axis L. The first piston rod 22 has a screw hole 221 disposed along the axis L.

The second piston member 30 includes a second piston ring 31 slidably mounted in the second cylinder chamber 15 along the axis L, and is connected to the second piston ring 31 and can be disposed through the through hole 121. The second piston rod 32 and an inner hole 33 disposed along the axis L and having a step shape. The first oil inlet 171 and the second oil inlet 172 are disposed on the two sides of the second piston ring 31 along the axis L. The inner hole 33 has an upper portion for the first piston rod 22 to be inserted. a hole segment 331, a lower hole segment 332 opposite to the upper hole segment 331 along the axis L, and a middle hole segment 333 connected between the upper hole segment 331 and the lower hole segment 332, and a middle hole portion 333 connected to the upper hole An upper shoulder surface 334 between the segment 331 and the middle hole section 333 and a lower shoulder surface 335 that is coupled between the middle hole section 333 and the lower hole section 332, the upper shoulder surface 334 is available for the first piston rod 22 bottom against.

The clamping unit 40 is mounted in the through hole 121 of the fixing base 10 and includes a clamping member 41 and a linking member 42 connected between the second piston member 32 and the clamping member 41. The jaw member 41 has a plurality of jaws 411 each having a pair of hook portions 412 that should open the opening end of the through hole 121 and a beam clamping portion 413 disposed inside the hook portion 412. The linking member 42 has a screw segment 421 screwed into the screw hole 221, a neck ring segment 422 connected to the screw segment 421 along the axis L and sleeved on the lower hole segment 332, and a The axis L is connected to the connecting portion 423 on one side of the neck ring segment 422. The neck ring segment 422 abuts the lower shoulder surface 335, and the neck ring segment 422 of the linking member 42 is used to abut the lower shoulder surface 335. And the screw segment 421 is screwed into the screw hole 221 to connect the second piston ring 31 and the first piston rod 22 to each other.

As shown in FIG. 2 and FIG. 3, the clamp jaws 411 are shown in a state of being brought closer to the axis L. The bundle clamps 413 clamp and fix the hammers 210 of the angle head 200.

As shown in FIG. 4, when the pressure oil is introduced from the propulsion oil hole 16, the pressure oil can be simultaneously injected into the first cylinder chamber 14 from the first oil inlet 161 and the second oil inlet 162, respectively. In the second cylinder chamber 15, the first piston ring 21 and the second piston ring 31 can be simultaneously pushed down along the first cylinder chamber 14 and the second cylinder chamber 15, respectively, and the clamping unit 40 is clamped. When the claw member 41 is tilted by the second piston rod 32, the hook portions 412 can be removed from the open end of the through hole 121, and the jaws 411 are released from the axis L, and the same is made. The beam clamp portion 413 is released relative to the hammer heads 210 of the angle head 200.

When the pressure oil is further introduced from the push oil injection hole 17, the pressure oil can be simultaneously injected into the first cylinder chamber 14 and the second cylinder chamber from the first oil inlet 171 and the second oil inlet 172, respectively. 15 and simultaneously pushing the first piston ring 21 and the second piston ring 31 upward along the first cylinder chamber 14 and the second cylinder chamber 15, respectively, the jaw member 41 of the clamping unit 40 is subjected to the first The pulling of the two piston rods 32 allows the hook portions 412 to be moved inwardly from the outside of the through hole 121. The jaws 411 approach the axis L and return to a clip state, and the bundles are clamped. The portion 413 is clamped and fixed with respect to the hoes 210 of the angle head 200.

Therefore, the present invention utilizes the overall structural fit to produce the following effects:

1. The first piston member 20 and the second piston member 30 are connected in series along the axis L to form a hydraulic clamping mechanism of the double piston, even if the first cylinder chamber 14 or the second cylinder chamber 15 It has the same cross-sectional area as the existing cylinder chamber, but it can produce twice the hydraulic clamping tension. Therefore, the cross-sectional area of the first cylinder chamber 14 or the second cylinder chamber 15 does not need to be increased, the pressure source does not need to be increased, and the overall manufacturing cost can be reduced.

2. The fixing base 10, the first piston member 20, the second piston member 30 and the clamping unit 40 can be modularized, and the module can be quickly replaced during the maintenance and repair, and the maintenance is shortened. Working hours.

It is to be noted that, in the above-mentioned embodiment of the present invention, the first cylinder chamber 14 and the second cylinder chamber 15 are disposed inside the fixing base 11 at intervals along the axis L, and cooperate with the first cylinder chamber 14 and The second cylinder chamber 15 is provided with the first piston member 20 and the second piston member 30. In fact, the number of cylinder chambers and the number of piston members are not limited to two, and may be two or more. Not shown).

In summary, the hydraulic clamping device of the novel double-layer piston can solve the technical problems existing in the existing structure, and can truly achieve the purpose of the present invention.

However, the above is only the embodiment of the present invention, and when it is not possible to limit the scope of the present invention, all the simple equivalent changes and modifications according to the scope of the patent application and the contents of the patent specification are still This new patent covers the scope.

100‧‧‧ nose
200‧‧‧ angle head
210‧‧‧ Shantou
10‧‧‧ Fixed seat
L‧‧‧ axis
11‧‧‧The upper body
12‧‧‧ Lower body
121‧‧‧through hole
13‧‧‧Parts
131‧‧‧Perforation
14‧‧‧First cylinder room
15‧‧‧Second cylinder room
16‧‧‧Advance oil hole
161‧‧‧First inlet
162‧‧‧Second inlet
17‧‧‧Return oil hole
171‧‧‧ first oil inlet
172‧‧‧Second inlet
20‧‧‧First piston parts
21‧‧‧First Piston Ring
22‧‧‧First piston rod
221‧‧‧ screw holes
30‧‧‧Second piston parts
31‧‧‧Second Piston Ring
32‧‧‧Second piston rod
33‧‧‧ 内孔
331‧‧‧Upper hole section
332‧‧‧ lower hole section
333‧‧‧Medium hole section
334‧‧‧Upper shoulder
335‧‧‧ lower shoulder
40‧‧‧Clamping unit
41‧‧‧claw parts
411‧‧‧claw
412‧‧‧Hook
413‧‧‧Bundle
42‧‧‧ linkages
421‧‧‧ screw section
422‧‧‧Neck ring segment
423‧‧‧ link segment

Other features and effects of the present invention will be clearly shown in the embodiments with reference to the drawings, wherein: FIG. 1 is a schematic view showing the installation of a conventional angle head grasping fixture; FIG. 2 is a hydraulic pressure of the double-layer piston of the present invention. FIG. 3 is a partially enlarged schematic view of FIG. 2; and FIG. 4 is a schematic view of the operation of the above-described embodiment of the present invention.

100‧‧‧ nose

22‧‧‧First piston rod

200‧‧‧ angle head

221‧‧‧ screw holes

210‧‧‧ Shantou

30‧‧‧Second piston parts

10‧‧‧ Fixed seat

31‧‧‧Second Piston Ring

L‧‧‧ axis

32‧‧‧Second piston rod

11‧‧‧The upper body

33‧‧‧ 内孔

12‧‧‧ Lower body

331‧‧‧Upper hole section

121‧‧‧through hole

332‧‧‧ lower hole section

13‧‧‧Parts

333‧‧‧Medium hole section

131‧‧‧Perforation

334‧‧‧Upper shoulder

14‧‧‧First cylinder room

335‧‧‧ lower shoulder

15‧‧‧Second cylinder room

40‧‧‧Clamping unit

16‧‧‧Advance oil hole

41‧‧‧claw parts

161‧‧‧First inlet

411‧‧‧claw

162‧‧‧Second inlet

412‧‧‧Hook

17‧‧‧Return oil hole

413‧‧‧Bundle

171‧‧‧ first oil inlet

42‧‧‧ linkages

172‧‧‧Second inlet

421‧‧‧ screw section

20‧‧‧First piston parts

422‧‧‧Neck ring segment

21‧‧‧First Piston Ring

423‧‧‧ link segment

Claims (4)

A hydraulic clamping device for a double-layer piston, comprising: a fixing seat disposed along an axis, and comprising a first cylinder chamber, a second cylinder chamber disposed along a side of the first cylinder chamber, and a a partition disposed between the first cylinder chamber and the second cylinder chamber and a through hole disposed along the axis and connectable to the outside by the second cylinder chamber, the partition having a line along the axis and being connectable a first piston member and a second piston chamber; a first piston member including a first piston ring slidably mounted in the first cylinder chamber along the axis and a first piston ring connected thereto And a first piston rod disposed on the through hole; a second piston member including a second piston ring slidably mounted in the second cylinder chamber along the axis and a second piston ring coupled to the second piston ring a second piston rod that is disposed in the through hole, the second piston ring is interconnected with the first piston rod; and a clamping unit is mounted in the through hole of the fixing seat and includes a clamping member The jaw member has a plurality of jaws that are tilted by the second piston rod and can be directed toward the axis A snap-on state that approaches is approached, operating in a released state away from the axis. The hydraulic pressure clamping device of the double-layer piston according to claim 1, wherein the fixing base further comprises a propulsion oil-filling hole communicating with the first cylinder chamber and the second cylinder chamber and communicating with the first cylinder a pushback oil hole of the chamber and the second cylinder chamber, the propulsion oil hole has a first oil inlet port on one side of the first piston ring and a second oil inlet port on a side of the second piston ring. The pushback oil hole has a first oil inlet on the other side of the first piston ring and a second oil inlet on the other side of the second piston ring. The hydraulic pressure clamping device of the double piston according to claim 1, wherein the first piston rod of the first piston member has a screw hole disposed along the axis, and the second piston member further includes an axis along the axis An inner hole having a stepped shape, the inner hole having an upper hole section for inserting the first piston rod, a lower hole section opposite to the upper hole section along the axis, and a communicating with the upper hole section a middle hole section between the lower hole section, an upper shoulder surface that is coupled between the upper hole section and the middle hole section, and a lower shoulder surface that is coupled between the middle hole section and the lower hole section, The clamping unit further includes a linking member coupled between the second piston member and the jaw member, the linking member having a screw segment screwed into the screw hole, and a screw segment coupled to the screw segment along the axis a neck ring segment disposed on one side of the lower hole section and a connecting section connected to one side of the neck ring segment along the axis, the neck ring segment abutting the lower shoulder surface. The hydraulic pressure clamping device of the double-layer piston according to claim 2, wherein the fixing base further comprises an upper seat body and a lower seat body disposed under the upper seat body along the axis, the partition member being disposed on the upper seat Between the body and the lower body, the first cylinder chamber is disposed between the upper seat and the partition, and the second cylinder chamber is disposed between the partition and the lower seat, and the advancement of the oil hole An oil inlet is disposed in the upper seat, the second oil inlet is disposed in the partition, a first oil inlet of the push oil hole is disposed in the partition, and the second oil inlet is disposed in the lower seat body.