CN213381126U - Pressing plate type oil pressure clamp - Google Patents

Abstract

The utility model discloses a clamp plate formula oil pressure anchor clamps, include: oil pressure unit and die clamping device, oil pressure unit include: the device comprises an upper oil cylinder, a lower oil cylinder, a piston, a spring, a pressure relief device and an oil inlet device; the upper oil cylinder and the lower oil cylinder are screwed through threads; the lower surface of the upper oil cylinder, the lower surface of the piston and the upper surface of the lower oil cylinder form an oil pressure cavity together; the oil inlet device is arranged in the lower oil cylinder and communicated with the oil pressure cavity; the pressure relief device is arranged in the lower oil cylinder and communicated with the oil pressure cavity; the inner wall of the upper cylinder is matched with the upper surface of the piston to form a rebound cavity, and a spring is arranged in the rebound cavity. The utility model provides a better clamp plate formula oil pressure anchor clamps of energy-conservation nature, oil feed device among the clamp plate formula oil pressure anchor clamps injects lubricating oil to the oil pressure intracavity unidirectionally, provides the required pressure of clamp plate formula oil pressure anchor clamps work, and the lubricating oil of injecting into the oil pressure intracavity can only flow through the pressure relief device with adjustable export, need not to keep the oil pressure through the oil pump, has greatly saved the energy.

Description

Pressing plate type oil pressure clamp

Technical Field

The utility model relates to an anchor clamps technical field especially relates to a clamp plate formula oil pressure anchor clamps.

Background

The jig is a device for fixing a processing object to occupy a correct position for receiving construction or inspection in a machine manufacturing process, and is also called a jig. In a broad sense, any device used to quickly, conveniently and safely mount a workpiece at any stage in a process may be referred to as a jig.

The fixture generally comprises a positioning element (for determining the correct position of a workpiece in the fixture), a clamping device, a tool setting guide element (for determining the relative position of the tool and the workpiece or guiding the direction of the tool), an indexing device (for enabling the workpiece to complete the processing of a plurality of stations in one-time installation, including a rotary indexing device and a linear motion indexing device), a connecting element, a fixture body (a fixture base), and the like.

The oil pressure anchor clamps replace mechanical parts with the oil pressure component and realize the automatic positioning to the work piece, support and tight anchor clamps of clamp, through the oil pressure component of selecting for use and the mechanical part assembly of design together, just can obtain required anchor clamps, the oil pressure anchor clamps can guarantee the accurate location and firm the clamp tightly of work piece on the position of regulation, and can reduce the vibration and the deformation in the processing through floating the support, can also utilize compressing tightly of automatic control clamp plate and lift up and let out the clamping position in the processing, the oil pressure anchor clamps can bear big cutting force in rough machining, also can guarantee the accurate positioning in precision machining, can also accomplish the support that manual clamp can't accomplish, press from both sides tightly and release fast.

The application of the hydraulic clamp in the existing clamp is the most extensive, but in the existing technology, the hydraulic clamp mainly depends on the oil pump to maintain the pressure in the hydraulic cavity, which causes unnecessary energy loss.

Disclosure of Invention

The utility model provides a better clamp plate formula oil pressure anchor clamps of energy-conservation uses the pressurization pressure release link in the adjustable pressure relief device control oil pressure intracavity of one-way oil feed device and export, no longer need use the oil pump to keep pressure, has greatly saved the energy.

A platen-type oil pressure jig comprising: oil pressure unit and die clamping device, oil pressure unit include: the oil feeding device comprises an upper oil cylinder, a lower oil cylinder, a piston, a first spring, a pressure relief device and an oil feeding device; the upper oil cylinder and the lower oil cylinder are screwed through threads; the lower surface of the upper oil cylinder, the lower surface of the piston and the upper surface of the lower oil cylinder form an oil pressure cavity together; the oil inlet device is arranged in the lower oil cylinder and communicated with the oil pressure cavity; the pressure relief device is arranged in the lower oil cylinder and communicated with the oil pressure cavity; the inner wall of the upper cylinder is matched with the upper surface of the piston to form a rebound cavity, and a first spring is arranged in the rebound cavity. The upper oil cylinder and the lower oil cylinder in the oil pressure device are screwed through threads, when the pressure in the oil pressure cavity is enough, the piston moves upwards, so that the pressing plate in the die clamping device presses downwards to clamp the die, and the first spring in the rebound cavity ensures that the oil pressure is released, and the pressing plate type oil pressure clamp is restored to the original position.

The die clamping device comprises: the pressing plate, the body, the retaining ring, the connecting rod, the steel ball and the reset spring; the connecting rod is connected with the body through the axis on the body and the pressing plate, and the snap ring is buckled with the clamping groove on the connecting rod; the reset spring is arranged in the groove of the lower oil cylinder, and the steel ball is arranged on the reset spring and connected with the reset spring. The reset spring and the steel ball in the die clamping device play a role in assisting the pressing plate to restore to the original position.

The oil feed device include: the oil inlet groove, the stop block, the second spring and the oil inlet cavity are formed; the check block is arranged in the oil inlet cavity, one side of the check block is connected with the oil inlet groove, and the other side of the check block is connected with a second spring; the cross section area of the oil inlet cavity is larger than that of the stop block. When lubricating oil is injected, the stop block moves upwards to compress the second spring and enters the oil inlet cavity, and when the oil pressure is enough, the second spring rebounds the stop block downwards to seal the oil inlet groove, so that the lubricating oil cannot flow out, and the pressure required by the pressing plate type oil pressure clamp during normal work is maintained.

The pressure relief device comprises: the sealing device comprises a left sealing ring, a sealing ball, a right sealing ring, a third spring, a screw, a sealing cover and an oil outlet groove; the center of the sealing ball is provided with an oil through hole which is fixed by a left sealing ring and a right sealing ring which are provided with spherical grooves; the third spring is arranged between the right sealing ring and the sealing cover; the screw is screwed with the sealing ball through a small hole on the right sealing ring, and the handle of the screw is in a long strip shape; two sides of the sealing cover are provided with an upper stop block and a lower stop block. After the pressing plate type oil pressure clamp finishes working, the oil through hole in the center of the sealing ball is aligned to the oil outlet groove by rotating the screw rod handle, and pressure is unloaded.

An annular groove is formed in the outer wall of the upper oil cylinder, a sealing space is formed between the annular groove and the inner wall of the lower oil cylinder, and a double-layer sealing ring is arranged in the groove; the piston outer wall on be equipped with annular groove, annular groove and last cylinder inner wall form sealed space, are equipped with double-deck sealing washer in the recess.

The double-layer sealing ring is composed of a back support ring and an O-shaped ring, the double-layer sealing ring ensures the sealing performance of the pressing plate type oil pressure clamp, and the oil leakage phenomenon is avoided.

From the above embodiment, it can be easily seen that the utility model has the following advantages: the utility model provides a better clamp plate formula oil pressure anchor clamps of energy-conservation nature, oil feed device among the clamp plate formula oil pressure anchor clamps injects lubricating oil to the oil pressure intracavity unidirectionally, provides the required pressure of clamp plate formula oil pressure anchor clamps work, and the lubricating oil of injecting into the oil pressure intracavity can only flow through the pressure relief device with adjustable export, need not to keep the oil pressure through the oil pump, has greatly saved the energy.

Drawings

FIG. 1 is a schematic view of the structure of a platen oil pressure clamp of the present invention;

fig. 2 is a schematic structural view of the oil inlet device of the pressing plate type oil pressure clamp of the utility model;

fig. 3 is the structure schematic diagram of the pressure relief device of the pressure plate type oil pressure clamp of the present invention.

Detailed Description

A platen-type oil pressure jig shown in fig. 1 to 3 includes: oil pressure unit and die clamping device, oil pressure unit includes: the device comprises an upper oil cylinder 10, a lower oil cylinder 7, a piston 11, a first spring 12, a pressure relief device 9 and an oil inlet device 8; the upper oil cylinder 10 and the lower oil cylinder 7 are screwed through threads; the lower surface of the upper oil cylinder 10, the lower surface of the piston 11 and the upper surface of the lower oil cylinder 7 form an oil pressure cavity 13 together; the oil inlet device 8 is arranged in the lower oil cylinder 7 and is communicated with the oil pressure cavity 13; the pressure relief device 9 is arranged in the lower oil cylinder 7 and communicated with the oil pressure cavity 13; the inner wall of the upper oil cylinder 10 is matched with the upper surface of the piston 11 to form a rebound cavity 14, and a first spring 12 is arranged in the rebound cavity 14. Die clamping device includes: the pressing plate 2, the body 1, the retaining ring 3, the connecting rod 4, the steel ball 5 and the reset spring 6; the connecting rod 4 is connected with the body 1 through the axis on the pressing plate 2, and the snap ring 3 is buckled with the clamping groove on the connecting rod 4; the return spring 6 is arranged in a groove of the lower oil cylinder 7, and the steel ball 5 is arranged on the return spring 6 and connected with the return spring 6. Oil feed device 8 includes: an oil inlet groove 81, a stopper 82, a second spring 84, and an oil inlet chamber 83; the block 82 is arranged in the oil inlet cavity 83, one side of the block 82 is connected with the oil inlet groove 81, and the other side is connected with a second spring 84; the cross-sectional area of the oil inlet chamber 83 is larger than that of the stopper 82. The pressure relief device 9 includes: the sealing device comprises a left sealing ring 91, a sealing ball 92, a right sealing ring 93, a third spring 94, a screw 95, a sealing cover 96 and an oil outlet groove 97; an oil through hole is formed in the center of the sealing ball 92 and is fixed by a left sealing ring and a right sealing ring which are provided with spherical grooves; the third spring 94 is arranged between the right sealing ring 93 and the sealing cover 96; the screw 95 is screwed with the sealing ball 92 through a small hole on the right sealing ring 93, and the handle of the screw 95 is in a long strip shape; two sides of the cover 96 are provided with an upper block and a lower block. An annular groove is formed in the outer wall of the upper oil cylinder 10, a sealing space is formed between the annular groove and the inner wall of the lower oil cylinder 7, and a double-layer sealing ring is arranged in the groove; the outer wall of the piston 11 is provided with an annular groove, the annular groove and the inner wall of the upper oil cylinder 10 form a sealing space, a double-layer sealing ring is arranged in the groove, and the double-layer sealing ring is composed of a back support ring 15 and an O-shaped ring 16.

As the preferred clamp plate formula oil pressure anchor clamps of structure, pour into lubricating oil through the oil feed device into, when the oiling, the dog rebound compression first spring and enter the oil feed chamber, when the oil pressure was enough, first spring rebounded the dog downwards and sealed the oil feed tank, made lubricating oil unable outflow, kept the required pressure of clamp plate formula oil pressure anchor clamps normal during operation. The upper oil cylinder and the lower oil cylinder in the oil pressure device are screwed through threads, when the pressure in the oil pressure cavity is enough, the piston moves upwards, so that the pressing plate in the die clamping device presses downwards to clamp the die, and the first spring in the rebound cavity ensures that the oil pressure is released, and the pressing plate type oil pressure clamp is restored to the original position. After the pressing plate type oil pressure clamp finishes working, the screw rod handle is rotated to align the oil through hole at the center of the sealing ball to the oil outlet groove, so that lubricating oil can smoothly flow out, the screw rod handle is rotated after pressure is unloaded, and the oil outlet groove is sealed for next use. The reset spring and the steel ball in the die clamping device play a role in assisting the pressing plate to restore to the original position.

Claims (6)

1. A platen-type oil pressure jig comprising: oil pressure unit and die clamping device, its characterized in that: the oil pressure device comprises: the oil cylinder device comprises an upper oil cylinder (10), a lower oil cylinder (7), a piston (11), a first spring (12), a pressure relief device (9) and an oil inlet device (8); the upper oil cylinder (10) and the lower oil cylinder (7) are screwed together through threads; the lower surface of the upper oil cylinder (10), the lower surface of the piston (11) and the upper surface of the lower oil cylinder (7) form an oil pressure cavity (13) together; the oil inlet device (8) is arranged in the lower oil cylinder (7) and is communicated with the oil pressure cavity (13); the pressure relief device (9) is arranged in the lower oil cylinder (7) and communicated with the oil pressure cavity (13); the inner wall of the upper oil cylinder (10) is matched with the upper surface of the piston (11) to form a rebound cavity (14), and a first spring (12) is arranged in the rebound cavity (14).

2. The platen-type oil pressure jig according to claim 1, characterized in that: the die clamping device comprises: the pressing plate (2), the body (1), the retaining ring (3), the connecting rod (4), the steel ball (5) and the reset spring (6); the connecting rod (4) is connected with the pressing plate (2) through the axle centers on the body (1) and the pressing plate, and the snap ring (3) is buckled with the clamping groove on the connecting rod (4); the return spring (6) is arranged in a groove of the lower oil cylinder (7), and the steel ball (5) is arranged on the return spring (6) and connected with the return spring (6).

3. The platen-type oil pressure jig according to claim 1, characterized in that: the oil feed device (8) comprises: the oil inlet structure comprises an oil inlet groove (81), a stop block (82), a second spring (84) and an oil inlet cavity (83); the check block (82) is arranged in the oil inlet cavity (83), one side of the check block (82) is connected with the oil inlet groove (81), and the other side of the check block (82) is connected with a second spring (84); the cross section area of the oil inlet cavity (83) is larger than that of the stop block (82).

4. The platen-type oil pressure jig according to claim 1, characterized in that: the pressure relief device (9) comprises: the oil pump comprises a left sealing ring (91), a sealing ball (92), a right sealing ring (93), a third spring (94), a screw (95), a sealing cover (96) and an oil outlet groove (97); an oil through hole is formed in the center of the sealing ball (92) and is fixed by a left sealing ring and a right sealing ring which are provided with spherical grooves; the third spring (94) is arranged between the right sealing ring (93) and the sealing cover (96); the screw (95) is screwed with the sealing ball (92) through a small hole on the right sealing ring (93), and the handle of the screw (95) is in a long strip shape; two sides of the sealing cover (96) are provided with an upper stop block and a lower stop block.

5. The platen-type oil pressure jig according to claim 1, characterized in that: an annular groove is formed in the outer wall of the upper oil cylinder (10), a sealing space is formed between the annular groove and the inner wall of the lower oil cylinder (7), and a double-layer sealing ring is arranged in the groove; the outer wall of the piston (11) is provided with an annular groove, the annular groove and the inner wall of the upper oil cylinder (10) form a sealing space, and a double-layer sealing ring is arranged in the groove.

6. The platen-type oil pressure jig according to claim 5, characterized in that: the double-layer sealing ring is composed of a back support ring (15) and an O-shaped ring (16).

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