Zero-point quick-change hydraulic base with linear jacking function

Abstract

The utility model discloses a zero-point quick-change hydraulic base with a linear jacking function. The zero-point quick-change hydraulic base comprises a body, hydraulic zero point positioners are respectively arranged at four corners of the top surface of the body; at least three double-acting linear cylinders are arranged on the top surface of the body close to the middle area; the multiple double-acting linear cylinders are arranged at intervals, hydraulic rods are slidably connected to the tops of the multiple double-acting linear cylinders, the telescopic direction of the hydraulic rods is the vertical direction, and the multiple double-acting linear cylinders are connected with the same driving source. The bottom of the clamp is supported through the hydraulic rods extending upwards from the at least three double-acting linear cylinders, stable supporting of three points or more is achieved, the double-acting linear cylinders are driven through the same driving source, the hydraulic rods can stretch out and draw back synchronously, the clamp is kept parallel to the zero-point quick-change hydraulic base all the time in the dismounting and mounting process, and the dismounting and mounting efficiency is improved. And the zero-point quick-change unit is prevented from being damaged.

Description

Technical Field

[0001] The utility model belongs to the field of machine tool fixtures and relates to a zero-point quick-change hydraulic base with a linear jacking function. Background Art

[0002] The function of the zero-point quick-change fixture is to achieve rapid positioning and clamping between the fixture and the machine tool, shortening the fixture replacement time. It is mainly used in flexible automated production lines, with convenient and fast production changes, and can be applied to the processing of different workpieces. Its quick replacement function and intelligent operation mode can greatly improve production efficiency and reduce labor intensity.

[0003] The zero-point quick-change unit mainly consists of two parts: the zero-point locator and the zero-point locating joint. The hydraulic zero-point locator used for the zero-point quick-change base is annular, and the zero-point locating joint used for the fixture base is cylindrical, called a pull nail. When the driving pressure is provided to the hydraulic zero-point locator, the zero-point locating joint can freely enter and exit the hydraulic zero-point locator. When the pressure is cut off, the hydraulic zero-point locator locks the zero-point locating joint and provides a certain clamping force. When in use, the hydraulic zero-point locator and the zero-point locating joint are respectively installed on the zero-point quick-change base and the fixture base. The zero-point quick-change base is fixed on the machine tool workbench. When processing workpieces or changing products, the zero-point quick-change base is provided with driving pressure, and the fixture with the zero-point locating joint is installed with the zero-point quick-change base. The fixture can be replaced or clamped within 1 minute, which greatly reduces the auxiliary time of mechanical processing and improves production efficiency.

[0004] However, the zero-point quick-change unit generally requires the fixture bottom plate to be parallel to the quick-change base so that the zero-point positioning joint and the hydraulic zero-point locator can cooperate smoothly. A slightly larger angle will easily damage the zero-point quick-change unit. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art and provide a zero-point quick-change hydraulic base with a linear jacking function, which supports the bottom surface of the disassembled fixture at multiple locations so that the fixture always remains parallel to the quick-change base, avoiding damage to the zero-point quick-change unit.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A zero-point quick-change hydraulic base with a linear jacking function, comprising a body;

[0008] A hydraulic zero point locator is provided at each of the four corners of the top surface of the body, and at least three double-acting linear cylinders are provided near the middle area of ​​the top surface of the body;

[0009] The multiple double-acting linear cylinders are arranged at intervals, the tops of the multiple double-acting linear cylinders are slidably connected with hydraulic rods, the extension and retraction directions of the hydraulic rods are vertical, and the multiple double-acting linear cylinders are connected to the same driving source.

[0010] Preferably, the double-acting linear cylinder includes a third cavity and a fourth cavity, the third cavity and the fourth cavity are separated by a piston, a hydraulic rod is arranged in the third cavity, one end of the hydraulic rod is connected to the piston, and the other end extends out of the top of the third cavity, and the hydraulic rod is arranged vertically upward; a reversing valve, an oil inlet and an oil return port are arranged on the main body, and the reversing valve adopts a two-position four-way reversing valve, and the oil inlet is divided into two interconnected paths, the first path is connected to four hydraulic zero point positioners, the second path is connected to the P port of the reversing valve, and the R port of the reversing valve is connected to the oil return port, the A port of the reversing valve is connected to the fourth cavity of each double-acting linear cylinder, and the B port of the reversing valve is connected to the third cavity of each double-acting linear cylinder.

[0011] Preferably, the hydraulic zero point positioner includes a first cavity and a second cavity, the first cavity and the second cavity are separated by a piston, springs are connected to both ends of the first cavity, and the first oil inlet is connected to the second cavity of the hydraulic zero point positioner. When the first cavity is compressed, the hydraulic zero point positioner is in a relaxed state, and when the second cavity is compressed, the hydraulic zero point positioner is in a locked state.

[0012] Preferably, a sequence valve is provided between the second oil inlet and the P port of the reversing valve.

[0013] Preferably, each double-acting linear cylinder is connected to a speed regulating valve.

[0014] Preferably, the speed regulating valve is connected to port A of the reversing valve.

[0015] Preferably, the reversing valve is connected to a manual reversing rod.

[0016] Preferably, two guide rods are vertically arranged on the top surface of the main body, the guide rods are arranged at intervals and are close to one side of the main body, and the positions and sizes of the two guide rods correspond to the two positioning holes at the bottom of the clamp.

[0017] Preferably, the multiple double-acting linear cylinders are evenly arranged in a circle, with the center of the circle being the center of the top surface of the body.

[0018] Preferably, a rubber pad is provided on the top of the hydraulic rod.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model supports the bottom of the clamp by hydraulic rods extending upward from at least three double-acting linear cylinders, thereby achieving stable support at three points or more, and drives each double-acting linear cylinder by the same driving source, so that the hydraulic rods can be synchronously extended and retracted, so that the clamp always remains parallel to the zero-point quick-change hydraulic base during the disassembly and assembly process, avoiding damage to the zero-point quick-change unit.

[0021] Furthermore, the reversing valve can realize the reversing movement of the hydraulic rod of the double-acting linear cylinder by using only one hydraulic pipeline.

[0022] Furthermore, under the action of the spring, the pistons in the four hydraulic zero point positioners can move downward after the oil inlet is cut off, so that the hydraulic zero point positioner can pull down and lock the zero point positioning joint on the fixture, thereby realizing the automatic locking function.

[0023] Furthermore, the sequence valve is used to set the start time of the double-acting linear cylinder to be later than the end time of the hydraulic zero positioner, so as to avoid interference between the two actions and damage to the components.

[0024] Furthermore, the speed regulating valve is used to adjust the extension and retraction speed of the hydraulic rod of each double-acting linear cylinder to be consistent, further ensuring the parallelism of the clamp and the zero-point quick-change hydraulic base.

[0025] Furthermore, the manual reversing rod is used to manually switch the passage of the reversing valve.

[0026] Furthermore, the two guide rods are arranged at one side to prevent the fixture from being installed upside down and to further ensure that the fixture is parallel to the zero-point quick-change hydraulic base.

[0027] Furthermore, the multiple double-acting linear cylinders are evenly arranged in a circle with the center of the circle being the center of the top surface of the body, so that the center of gravity of the fixture is located in the middle of the multiple double-acting linear cylinders, thereby improving parallelism. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a top view of the zero-point quick-change hydraulic base of the utility model;

[0029] Figure 2 It is a side view of the zero-point quick-change hydraulic base of the utility model;

[0030] Figure 3 This is the hydraulic principle diagram of the zero-point quick-change hydraulic base of the utility model.

[0031] Among them: 1-main body; 2-hydraulic zero point positioner; 3-sequence valve; 4-double-acting linear cylinder; 5-guide rod; 6-reversing valve; 7-speed regulating valve. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0033] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0035] like Figure 1 As shown, the zero-point quick-change hydraulic base with a linear jacking function described in the utility model includes a body 1, a hydraulic zero-point positioner 2, a sequence valve 3, a double-acting linear cylinder 4, a guide rod 5, a reversing valve 6 and a speed regulating valve 7.

[0036] The main body 1 is a rectangular thick plate structure with large-sized surfaces on the top and bottom surfaces. The four corners of the top surface of the main body 1 are respectively connected to a hydraulic zero point locator 2 by screws. At least three double-acting linear cylinders 4 are arranged near the middle area of ​​the top surface of the main body 1. The double-acting linear cylinders 4 are evenly arranged in a circle with the center of the circle being the center of the top surface of the main body 1, so that the center of gravity of the clamp will not be offset, reducing the probability of tilting. The hydraulic rod of the double-acting linear cylinder 4 is arranged vertically upward, and the extension and retraction direction of the hydraulic rod is perpendicular to the top surface of the main body 1.

[0037] Two guide rods 5 are vertically arranged on the top surface of the main body 1. The top of the guide rods 5 is higher than the top of the hydraulic zero point locator 2. The guide rods 5 are arranged at intervals and are close to one side of the main body 1. The positions and sizes of the two guide rods 5 correspond to the two positioning holes at the bottom of the clamp.

[0038] The hydraulic zero point positioner 2 includes a first cavity and a second cavity, the first cavity and the second cavity are separated by a piston, a spring is arranged in the first cavity, two ends of the spring are respectively connected to the piston and the end of the first cavity, the length of the spring is greater than the sum of the lengths of the first cavity and the second cavity, so that the spring is always in a compressed state, when the first cavity is compressed, the hydraulic zero point positioner 2 is in a relaxed state, the zero point positioning joint can freely enter and exit the hydraulic zero point positioner 2, and the fixture can be placed on the zero point quick change base, when the second cavity is compressed, the hydraulic zero point positioner 2 is in a locked state, and the zero point positioning joint on the fixture is pulled down and locked.

[0039] The double-acting linear cylinder 4 includes two chambers, namely the third chamber and the fourth chamber. The third chamber and the fourth chamber are separated by a piston. A hydraulic rod is arranged in the third chamber. One end of the hydraulic rod is connected to the piston, and the other end extends out of the top of the third chamber. When the third chamber is compressed, the hydraulic rod extends out of the double-acting linear cylinder 4 to lift the clamp. When the fourth chamber is compressed, the hydraulic rod retracts. A rubber pad is arranged on the top of the hydraulic rod.

[0040] The side of the body 1 is provided with a sequence valve 3 and a reversing valve 6 by screws. The reversing valve 6 adopts a two-position four-way reversing valve, including four ports, namely port A, port B, port P and port R. When the reversing valve 6 is in the 0 state, port P is connected with port B, and port A is connected with port R. When the reversing valve 6 is in the 1 state, port P is connected with port A, and port B is connected with port R.

[0041] An oil inlet P and an oil return port R are provided on the main body 1. The oil inlet is divided into two interconnected paths. The first path is connected to the second cavities of the four hydraulic zero point positioners 2, and the second path is connected to the oil inlet of the sequence valve 3. The oil outlet of the sequence valve 3 is connected to the P port of the reversing valve 6, and the R port of the reversing valve 6 is connected to the oil return port. The A port of the reversing valve 6 is connected to the fourth cavity of each double-acting linear cylinder 4, and the B port of the reversing valve 6 is connected to the third cavity of each double-acting linear cylinder 4.

[0042] The sequence valve 3 is used to make the start time of the double-acting linear cylinder 4 later than the end time of the hydraulic zero positioner 2 to avoid interference between the two actions and damage to components. The reversing valve 6 is connected to a manual reversing rod for manually switching the passage of the reversing valve 6.

[0043] Each double-acting linear cylinder 4 is connected to a speed regulating valve 7 , which is connected to port A of the reversing valve 6 . The speed regulating valve 7 is used to adjust the extension and retraction speed of the hydraulic rod of each double-acting linear cylinder 4 to be consistent.

[0044] When used for the first time, the extension and retraction speed of the hydraulic rod of each double-acting linear cylinder 4 is adjusted to be basically the same through the speed regulating valve 7.

[0045] When installing the fixture, adjust the reversing valve 6 to state 1, and introduce hydraulic oil into the oil inlet. Under pressure drive, the first chambers of the four hydraulic zero point positioners 2 are compressed, and the hydraulic zero point positioners 2 are relaxed. The hydraulic oil flows from the P port to the A port of the reversing valve 6 to the fourth chamber of the double-acting linear cylinder 4. The third chamber of the double-acting linear cylinder 4 is compressed, and the hydraulic rod extends out of the double-acting linear cylinder 4. Under the action of the sequence valve 3, the hydraulic rod of the double-acting linear cylinder 4 rises after a few seconds after the hydraulic zero point positioner 2 is relaxed, and the bottom of the fixture contacts the top of the hydraulic rod. The two guide rods 5 are inserted into the two positioning holes at the bottom of the fixture.

[0046] The reversing valve 6 switches to the 0 state, and the hydraulic oil flows from the P port to the B port of the reversing valve 6 to the third chamber of the double-acting linear cylinder 4. The fourth chamber of the double-acting linear cylinder 4 is compressed, and the hydraulic rod gradually retracts. The hydraulic rod lowers the clamp in the vertical direction, and the zero point positioning joint is inserted into the hydraulic zero point positioner 2.

[0047] After installation, cut off the oil inlet, the pistons in the four hydraulic zero point positioners 2 move downward under the action of the spring, the hydraulic oil in the second cavity is discharged from the oil inlet, the hydraulic zero point positioner 2 pulls down and locks the zero point positioning joint on the fixture, and starts the machine tool for cutting.

[0048] After the processing is completed, the reversing valve 6 is adjusted to state 1, and hydraulic oil is introduced into the oil inlet. Under the pressure drive, the first cavity of the four hydraulic zero point positioners 2 is compressed, and the hydraulic zero point positioner 2 is relaxed. The hydraulic oil flows from the P port to the A port of the reversing valve 6 to the fourth cavity of the double-acting linear cylinder 4. The third cavity of the double-acting linear cylinder 4 is compressed, and the hydraulic rod extends out of the double-acting linear cylinder 4. Under the action of the sequence valve 3, the hydraulic rod of the double-acting linear cylinder 4 rises after a delay of a few seconds after the hydraulic zero point positioner 2 is relaxed. The hydraulic rod lifts the fixture in the vertical direction, and the zero point positioning joint leaves the hydraulic zero point positioner 2. At this time, the fixture is taken out and a new fixture is put in for the next round of processing. This reciprocating change of production is carried out to achieve quick fixture change.

[0049] The zero-point quick-change hydraulic base of the present application uses only two external oil circuits and can be powered by a double-acting hydraulic station, thereby improving machining efficiency and product quality, and having a good guiding role for other similar working conditions.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0051] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the foregoing claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended to be a waiver of the subject matter, nor should it be considered that the applicant has not considered the subject matter as part of the disclosed utility model subject matter.

Claims

1. A zero-point quick-change hydraulic base with a linear lifting function, characterized in that: The invention comprises a body (1); A hydraulic zero point positioner (2) is respectively arranged at the four corners of the top surface of the main body (1), and at least three double-acting linear cylinders (4) are arranged near the middle area of ​​the top surface of the main body (1); The multiple double-acting linear cylinders (4) are arranged at intervals, the tops of the multiple double-acting linear cylinders (4) are all slidably connected with hydraulic rods, the extension and retraction directions of the hydraulic rods are vertical, and the multiple double-acting linear cylinders (4) are connected to the same driving source.

2. The zero-point quick-change hydraulic base with linear jacking function according to claim 1 is characterized in that: The double-acting linear cylinder (4) comprises a third cavity and a fourth cavity, the third cavity and the fourth cavity are separated by a piston, a hydraulic rod is arranged in the third cavity, one end of the hydraulic rod is connected to the piston, and the other end extends out of the top of the third cavity, and the hydraulic rod is arranged vertically upward; a reversing valve (6), an oil inlet and an oil return port are arranged on the body (1), the reversing valve (6) adopts a two-position four-way reversing valve, the oil inlet is divided into two mutually connected paths, the first path is connected to four hydraulic zero point positioners (2), the second path is connected to the P port of the reversing valve (6), the R port of the reversing valve (6) is connected to the oil return port, the A port of the reversing valve (6) is connected to the fourth cavity of each double-acting linear cylinder (4), and the B port of the reversing valve (6) is connected to the third cavity of each double-acting linear cylinder (4).

3. The zero-point quick-change hydraulic base with linear jacking function according to claim 2 is characterized in that: The hydraulic zero point positioner (2) comprises a first cavity and a second cavity, the first cavity and the second cavity are separated by a piston, springs are connected to both ends of the first cavity, a first oil inlet is connected to the second cavity of the hydraulic zero point positioner (2), when the first cavity is compressed, the hydraulic zero point positioner (2) is in a relaxed state, and when the second cavity is compressed, the hydraulic zero point positioner (2) is in a locked state.

4. The zero-point quick-change hydraulic base with linear jacking function according to claim 3 is characterized in that: A sequence valve (3) is provided between the second oil inlet and the P port of the reversing valve (6).

5. The zero-point quick-change hydraulic base with linear jacking function according to claim 2 is characterized in that: Each double-acting linear cylinder (4) is connected to a speed regulating valve (7).

6. The zero-point quick-change hydraulic base with linear jacking function according to claim 5, characterized in that: The speed regulating valve (7) is connected to the port A of the reversing valve (6).

7. The zero-point quick-change hydraulic base with linear jacking function according to claim 2, characterized in that: The reversing valve (6) is connected with a manual reversing rod.

8. The zero-point quick-change hydraulic base with linear jacking function according to claim 1, characterized in that: Two guide rods (5) are vertically arranged on the top surface of the body (1). The guide rods (5) are arranged at intervals and are close to one side of the body (1). The positions and sizes of the two guide rods (5) correspond to the two positioning holes at the bottom of the clamp.

9. The zero-point quick-change hydraulic base with linear jacking function according to claim 1, characterized in that: The plurality of double-acting linear cylinders (4) are evenly arranged in a circle, with the center of the circle being the center of the top surface of the body (1).

10. The zero-point quick-change hydraulic base with linear jacking function according to claim 1, characterized in that: A rubber pad is provided on the top of the hydraulic rod.

Images