Double action clamp

Abstract

The present invention relates to a double-action clamp with hydraulic brake, which comprises: a fixed seat having a containing space; a piston having a protruding rod and arranged in the containing space, dividing the containing space into a first and a second hydraulic chamber; a check valve, a first hydraulic input hole and a second hydraulic input hole are arranged in the fixed seat; when hydraulic oil is input from the first hydraulic input hole, the hydraulic oil first passes through the check valve and then enters the first hydraulic chamber, which can push the piston and make the protruding rod protrude to generate clamping force; when hydraulic oil is input from the second hydraulic input hole, the hydraulic oil opens the check valve and enters the second hydraulic chamber, so that the hydraulic oil in the first hydraulic chamber can return from the original pipeline along the check valve. In this way, the double-action clamp of the present invention can reset the piston by hydraulic pressure, so as to achieve the effect of quickly loosening the clamp.

Description

Technical Field

[0001] The present invention relates to a double-action die clamp, in particular to a die clamp which uses oil pressure to reset the die. Background Art

[0002] The existing clamp structure is roughly as follows Figure 1 As shown, it comprises: a fixing seat 1, a sleeve 2 assembled on the fixing seat 1, a piston 3 arranged in the sleeve 2, a protruding rod 4 is provided on the top of the piston 3, and a return spring 5 is provided on the sleeve 2, and an oil pressure chamber 6 is provided below the piston 3. When the oil pressure chamber 6 below is filled with hydraulic oil, the piston 3 can be pushed up, so that the protruding rod 4 protrudes out of the sleeve 2, and a clamping force can be obtained; when the hydraulic oil returns, the return spring 5 will help to return the piston 3.

[0003] If the clamping force direction is to be changed, a convex seat 7 may be connected to the fixing seat 1, and a clamping block 8 may be pivotally connected to the convex seat 7. One end of the clamping block 8 may be pushed by the convex rod 4, and the other end of the clamping block 8 may change the clamping force direction. However, the above structure actually has the following disadvantages:

[0004] (1) There is no seal between the protruding rod 4 and the sleeve 2 of the existing clamp, which causes air and moisture to enter the interior through the gap, making the protruding rod 4, spring 5 and other parts easy to rust. Dust and processing debris may also block the gap, increasing the friction when the protruding rod 4 is extended and retracted, so that the reset speed of the protruding rod 4 is reduced.

[0005] (2) When the existing clamp is to be relaxed, the hydraulic oil in the oil pressure chamber 6 is pushed back by the elastic force of the return spring 5 and the gravity generated by the weight of the piston 3, so that the piston 3 is reset and the protruding rod 4 is retracted into the sleeve 2. However, the elastic force and gravity are relatively small compared to the pressure in the oil pressure chamber 6, so that the reset speed of the piston 3 is slow, and after long-term use, the spring 5 may become elastically fatigued, further reducing the reset speed. The time for the clamp to become relaxed is prolonged, and the mold object cannot be quickly replaced.

[0006] (3) The front of the existing clamping block 8 is designed to be a right angle. When the clamping block 8 is pressed down, the clamping point of the clamping block 8 will shrink inward, making the distance between it and the edge of the mold object W smaller, which can easily cause the mold object W to deform and easily cause the clamping block 8 to slip off the mold, making it impossible to use stably. Summary of the invention

[0007] The object of the present invention is to provide a double-action clamp to improve the above-mentioned existing disadvantages.

[0008] To achieve the above object, the present invention provides a double-action clamp, which comprises:

[0009] A fixing seat having a containing space;

[0010] A cover having a through hole in the middle thereof, the cover is assembled above the fixing seat, and the cover has a first outer ring groove, a first inner ring groove, and a second inner ring groove;

[0011] A piston is assembled in the accommodating space to divide the accommodating space into a first oil pressure chamber and a second oil pressure chamber. The piston has a protruding rod and a second outer ring groove in the middle. The protruding rod can protrude from the through hole of the cover. The length of the protruding rod protruding from the cover is less than or equal to the length from the top of the cover to the first inner ring groove.

[0012] A check valve, which is assembled on the fixed seat;

[0013] A first oil pressure input hole is arranged on the fixing seat. When the hydraulic oil is input from the first oil pressure input hole, the hydraulic oil first passes through the check valve and then enters the first oil pressure chamber;

[0014] A second oil pressure input hole is arranged on the fixing seat. When the hydraulic oil is input from the second oil pressure input hole, the hydraulic oil will open the check valve and enter the second oil pressure chamber;

[0015] Four oil seals are respectively arranged in the first outer ring groove, the first inner ring groove, the second inner ring groove and the second outer ring groove.

[0016] The aforementioned double-action clamp further comprises:

[0017] A convex seat connected to the fixing seat, the convex seat having a first axial hole and a second axial hole;

[0018] A clamping block having a pivot axis hole;

[0019] A shaft column passes through the first shaft hole, the fulcrum shaft hole and the second shaft hole, and the clamping block is pivotally connected to the convex seat, so that one end of the clamping block can be pushed by the convex rod.

[0020] The aforementioned double-action clamp further comprises:

[0021] A return spring is assembled on the convex seat and can assist the clamping block to return to its original position.

[0022] In the aforementioned double-action clamp, the lower bottom surface of the clamping block is longer than the upper bottom surface, so that the side surface of the clamping block is an inclined surface.

[0023] The beneficial effects of the present invention are as follows: a hydraulic double-acting clamp is designed, which comprises: a fixed seat having a containing space; a piston having a protruding rod arranged in the containing space, dividing the containing space into a first and a second hydraulic chamber; a check valve arranged in the fixed seat; a first hydraulic input hole arranged in the fixed seat, when hydraulic oil is input from the first hydraulic input hole, the hydraulic oil will first pass through the check valve and then enter the first hydraulic chamber, and the piston can be pushed up, so that the protruding rod protrudes to generate a clamping force; a second hydraulic input hole arranged in the fixed seat, when hydraulic oil is input from the second hydraulic input hole, the hydraulic oil will open the check valve and enter the second hydraulic chamber, so that the hydraulic oil in the first hydraulic chamber can return from the original pipeline along the check valve. In this way, the double-acting clamp of the present invention can reset the piston by hydraulic pressure, so as to achieve the effect of quickly loosening the clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a side sectional view of the existing clamp structure.

[0025] Figure 2 It is a three-dimensional exploded view of the present invention.

[0026] Figure 3 It is a combined stereogram of the present invention.

[0027] Figure 4 It is a top view of the present invention.

[0028] Figure 5 It is the AA cross-sectional view of the present invention.

[0029] Figure 6 It is a BB cross-sectional view of the present invention.

[0030] Figure 7 It is a CC cross-sectional view of the present invention.

[0031] Figure 8 It is a schematic diagram of the force application state of the clamp of the present invention.

[0032] Fig. 9 It is a schematic diagram of the clamping state of the clamp of the present invention.

[0033] Fig.10 It is a schematic diagram of the clamp of the present invention in a relaxed state.

[0034] Fig.11 This is a second schematic diagram of the clamp in a relaxed state according to the present invention.

[0035] Description of reference numerals:

[0036] 1Fixed seat

[0037] 2 sleeves

[0038] 3 Piston

[0039] 4 convex rod

[0040] 5Return spring

[0041] 6Hydraulic chamber

[0042] 7 Boss

[0043] 8 Clamping block

[0044] WMold Objects

[0045] 10 Fixed seat

[0046] 100 storage space

[0047] 101 First Hydraulic Chamber

[0048] 102 Second hydraulic chamber

[0049] 11. Block

[0050] 110 Perforation

[0051] 111 first outer ring groove

[0052] 121 first inner ring groove

[0053] 122 second inner ring groove

[0054] 13 Piston

[0055] 131 convex rod

[0056] 132 second outer ring groove

[0057] 14 Check valve

[0058] 151 First oil pressure input hole

[0059] 152 Second oil pressure input hole

[0060] 161, 162, 171, 172 oil seal

[0061] 20 convex seat

[0062] 201 first axis hole

[0063] 202 second axis hole

[0064] 21 Clamping block

[0065] 210 pivot shaft hole

[0066] 211 bottom surface

[0067] 212 upper bottom surface

[0068] 213 bevel

[0069] 22 Axis Column

[0070] 23 Return spring

[0071] L1, L2 length. DETAILED DESCRIPTION

[0072] See also Figures 2 to 10 The present invention relates to a double-action clamp, comprising: a fixed seat 10 having a receiving space 100; a cover 11 having a through hole 110 in the middle thereof, which is assembled above the fixed seat 10, and the cover 11 has a first outer ring groove 111, a first inner ring groove 121, and a second inner ring groove 122; a piston 13, which is assembled in the receiving space 100, and divides the receiving space 100 into a first oil pressure chamber 101 and a second oil pressure chamber 102, and the piston has a protruding rod 131 and a second outer ring groove 132 in the middle, and the protruding rod 131 can protrude from the through hole 110 of the cover 11; a check valve 14, which is assembled on the fixed seat 10; a first An oil pressure input hole 151 is assembled on the fixed seat 10. When the hydraulic oil is input from the first oil pressure input hole 151, the hydraulic oil will first pass through the check valve 14 and then enter the first oil pressure chamber 101. A second oil pressure input hole 152 is assembled on the fixed seat 10. When the hydraulic oil is input from the second oil pressure input hole 152, the hydraulic oil will open the check valve 14 and enter the second oil pressure chamber 102. Four oil seals 161, 171, 172, and 162 are respectively arranged in the first outer ring groove 111, the first inner ring groove 121, the second inner ring groove 122, and the second outer ring groove 132; in this way, the convex rod 131 can be used as a clamp to provide clamping force.

[0073] If the force direction is to be changed, a convex seat 20 may be provided, which is connected to the fixing seat 10 and has a first shaft hole, a second shaft hole 201, and a clamping block 21, which has a fulcrum shaft hole 210; a shaft column 22 passes through the first shaft hole 201, the fulcrum shaft hole 210, and the second shaft hole 202, and the clamping block 21 is pivotally connected to the convex seat 20, so that one end of the clamping block 21 can be pushed by the convex rod 131. In addition, the convex seat 20 may be provided with a return spring 23, which is assembled on the convex seat 20 and can help the clamping block 21 to return to its original position.

[0074] See also Figures 8 to 11When the present invention is used, the mold object W is first pushed to a position, and then hydraulic oil is input through the first oil pressure input hole 151. The hydraulic oil will first pass through the check valve 14 and then enter the first oil pressure chamber 101. Due to the existence of the check valve 14, the hydraulic oil can be maintained in the first oil pressure chamber 101 to continuously provide clamping force. When the clamp is to be loosened, hydraulic oil is input through the second oil pressure input hole 152. The hydraulic oil will open the check valve 14 and enter the second oil pressure chamber 102, so that the hydraulic oil in the first oil pressure chamber 101 can return from the original pipeline along the check valve 14, so that the protruding rod 131 is retracted into the cover 11, and the reset spring 23 can push the clamping block 21 to help the clamping block 21 reset.

[0075] According to the above structure, the following effects and advantages can be achieved:

[0076] (1) Compared with the existing structure, the present invention eliminates the configuration of the sleeve 3, and the clamping force is positively correlated with the piston area. Therefore, if a clamp with the same clamping force as the existing one is required, that is, the piston area is the same as the existing one, the overall clamp volume can be reduced, so that the mold object to be clamped can be designed in a more flexible shape; if the overall clamp volume remains unchanged, that is, the piston area can be enlarged, the clamping force can be increased.

[0077] (2) When the piston 13 of the present invention is reset, it mainly relies on inputting hydraulic oil from the second hydraulic input hole 152, allowing the hydraulic oil to enter the second hydraulic chamber 102, and opening the check valve 14, so that the hydraulic oil in the first hydraulic chamber 101 can return along the original pipeline. In this way, the time required for the clamp to relax can be greatly reduced, achieving the effect of quickly replacing the mold.

[0078] (3) The sealing cover of the present invention is provided with a first inner ring groove 121 and a second inner ring groove 122, an oil seal 171 is provided in the first inner ring groove 121, and an oil seal 172 is provided in the second inner ring groove 122. The oil seal 171 can block external air, moisture, and dust, so that the mold clamp of the present invention has a waterproof function and can be applied to more purposes.

[0079] (4) Please refer to Figure 8 Part of the protruding rod 131 of the present invention is exposed to the outside for a long time, which will inevitably cause rust. In order to prevent the surface corrosion from contaminating the hydraulic oil, an oil seal 172 is provided in the second inner ring groove 122, and the length L1 of the protruding rod 131 from the cover can be less than or equal to the length L2 from the top of the cover to the first inner ring groove 121. When the protruding rod 131 is retracted, the part that has been exposed to the outside will not be lower than the oil seal 172, so that the hydraulic oil can be prevented from being contaminated by the outside.

[0080] (5) The lower bottom surface 211 of the clamping block 21 of the present invention is longer than the upper bottom surface 212, so that the side surface of the clamping block is an inclined surface 213. When the clamping block 21 is pressed down, the clamping block 21 can maintain the position of the clamping point during the pressing process, solving the problem that the existing clamping point shrinks inward, causing the edge of the mold object W to be easily deformed and slipped, so that the clamp can clamp the mold more stably and extend the service life of the mold.

[0081] The above is only one of the preferred embodiments of the present invention, and the scope of protection of the claims of the present invention cannot be limited thereto; that is, all equivalent changes and modifications made within the scope of protection of the claims of the present invention should still fall within the scope of protection of the claims of the present invention.

Claims

1. A double-action clamp, characterized in that: Include: A fixing seat having a containing space; A cover having a through hole in the middle thereof, the cover is assembled above the fixing seat, and the cover has a first outer ring groove, a first inner ring groove, and a second inner ring groove; a piston, which is assembled in the accommodating space, dividing the accommodating space into a first oil pressure chamber and a second oil pressure chamber, and the piston has a protruding rod and a second outer ring groove in the middle, the protruding rod can protrude from the through hole of the cover, and the length of the protruding rod protruding from the cover is less than or equal to the length from the top of the cover to the first inner ring groove; A check valve, which is assembled on the fixed seat; A first oil pressure input hole is arranged on the fixing seat. When the hydraulic oil is input from the first oil pressure input hole, the hydraulic oil first passes through the check valve and then enters the first oil pressure chamber; a second oil pressure input hole, which is arranged on the fixing seat. When the hydraulic oil is input from the second oil pressure input hole, the hydraulic oil will enter the second oil pressure chamber and open the switch of the check valve, so that the hydraulic oil in the first oil pressure chamber can return along the original pipeline; Four oil seals are respectively arranged in the first outer ring groove, the first inner ring groove, the second inner ring groove and the second outer ring groove.

2. The double-action clamp according to claim 1, characterized in that: Also features: A convex seat connected to the fixing seat, the convex seat having a first axial hole and a second axial hole; A clamping block having a pivot axis hole; An axial column passes through the first axial hole, the fulcrum axial hole and the second axial hole, and the clamping block is pivotally connected to the convex seat, so that one end of the clamping block can be pushed by the convex rod.

3. The double-action clamp according to claim 2, characterized in that Also features: A return spring is assembled on the convex seat and can assist the clamping block to return to its original position.

4. The double-action clamp according to claim 2 or 3, characterized in that: The lower bottom surface of the clamping block is longer than the upper bottom surface, so that the side surface of the clamping block is an inclined surface.

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