Air-cut self-locking clamp for ultra-precise hydrostatic linear guide rail

Abstract

The invention provides an ultra-precise hydrostatic linear guide rail air-cut self-locking clamp. The ultra-precise hydrostatic linear guide rail air-cut self-locking clamp comprises a base, a first locking claw, a second locking claw, a first wedge-shaped block, an elastic assembly, a locking rod and a driving assembly. The first locking claw is rotationally connected to the base, and the first locking claw is provided with a first locking part; the second locking claw is rotationally connected to the base, the second locking claw and the first locking claw are oppositely arranged, and the second locking claw is provided with a second locking part; the inclined surface of the first wedge-shaped block is propped against the first locking claw and the second locking claw; the elastic assembly is connected with the first locking claw and the second locking claw; the locking rod is arranged between the first locking part and the second locking part; the output end of the driving assembly is connected to the first wedge-shaped block and used for driving the first wedge-shaped block to move and driving the first locking part and the second locking part to be relatively closed or opened so as to clamp, lock or loosen the locking rod. The self-locking device can realize a reliable self-locking function, provides a very accurate position keeping capability, and is low in cost and easy to check and maintain.

Description

Technical Field

[0001] The present invention relates to the field of mechanical braking, and more particularly, to an ultra-precision hydrostatic linear guide air-off self-locking clamp. Background Art

[0002] In modern precision manufacturing and automated production, linear guide systems are crucial for ensuring high-precision positioning and smooth movement. Existing hydrostatic guide technologies can provide smooth movement with extremely low friction coefficients, but when power, air source, or liquid source is interrupted, traditional systems lack an effective self-locking mechanism to maintain the current position, leading to possible unexpected displacements, which not only affect machining accuracy but also may pose safety hazards. In addition, some existing solutions either rely on complex electronic control systems, increasing the system's failure risk, or require continuous energy supply to maintain the locked state, restricting their application scope and increasing operating costs.

[0003] Therefore, there is an urgent need for a braking device that can automatically activate the self-locking function in the event of power failure or air interruption, to improve the safety and reliability of the system, while simplifying the maintenance process and reducing energy consumption. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] The technical problem to be solved by the present invention is that existing self-locking devices rely on complex electronic control systems, increasing the system's failure risk, and require continuous energy supply to maintain the locked state, restricting their application scope and increasing operating costs.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] The present invention provides an ultra-precision hydrostatic linear guide air-off self-locking clamp, which includes a base, a first locking claw, a second locking claw, a first wedge block, an elastic component, a locking rod, and a driving component; the first locking claw is rotatably connected to the base, and the first locking claw has a first locking portion; the second locking claw is rotatably connected to the base, the second locking claw is disposed opposite to the first locking claw, and the second locking claw has a second locking portion; two opposite inclined surfaces of the first wedge block respectively abut against the first locking claw and the second locking claw; the elastic component connects the first locking claw and the second locking claw; the locking rod is disposed between the first locking portion and the second locking portion; an output end of the driving component is connected to the first wedge block, and the driving component is configured to drive the first wedge block to move, drive the first locking portion and the second locking portion to open relatively to release the locking rod, or the elastic component drives the first locking portion and the second locking portion to close relatively to clamp and lock the locking rod.

[0009] Preferably, it further includes a sleeve, one end of the sleeve abuts against the driving component, and a second wedge block is provided at the other end of the sleeve, and two opposite inclined surfaces of the second wedge block respectively abut against the first locking claw and the second locking claw.

[0010] Preferably, it further includes an extension rod, the driving component is a cylinder, the extension rod passes through the sleeve, one end of the extension rod is connected to the output end of the cylinder, and the other end of the extension rod is connected to the first wedge block.

[0011] Preferably, it further includes a washer, and the washer is disposed between the driving component and the sleeve.

[0012] Preferably, the elastic component includes a first screw and a disc spring, the first screw includes a screw rod and a screw head connected to each other, the first locking claw is provided with a first through hole, the first screw passes through the first through hole and is fixedly connected to the second locking claw, the disc spring is sleeved outside the screw rod, one end of the disc spring abuts against the screw head, and the other end of the disc spring abuts against the first locking claw.

[0013] Preferably, it further includes a first limit set screw and a second limit set screw, the base is provided with a receiving cavity, ends of the first locking claw and the second locking claw are disposed in the receiving cavity, the first limit set screw is threadedly connected to the base and its end abuts against the first locking claw, and the second limit set screw is threadedly connected to the base and its end abuts against the second locking claw.

[0014] Preferably, it further includes a third limit set screw, the third limit set screw is threadedly connected to the first clamping claw and its end abuts against the second clamping claw.

[0015] Preferably, it further comprises a first rotating pin and a second rotating pin, wherein the first rotating pin is rotationally connected to the first clamping claw and the base, and the second rotating pin is rotationally connected to the second clamping claw and the base.

[0016] Preferably, the first locking portion comprises a first clamping block having a first semicircular groove, the second locking portion comprises a second clamping block having a second semicircular groove, and the locking rod is disposed between the first semicircular groove and the second semicircular groove.

[0017] Preferably, the inner wall surface of the first semicircular groove is provided with a plurality of striped protrusions, and / or the inner wall surface of the second semicircular groove is provided with striped protrusions.

[0018] (III) Beneficial effects

[0019] The above technical solution of the present invention has at least the following advantages:

[0020] 1. The present invention is suitable for low-load and small motion inertia working conditions such as ultra-precision liquid hydrostatic linear guides. It adopts a mechanical claw structure. The symmetrical clamping force generated by the first locking claw and the second locking claw can effectively clamp the locking rod, while preventing the hydraulic guide from being subjected to bending and twisting forces during the braking process. Even in the event of power or other control system failures, it can achieve a reliable self-locking function, provide a very precise position holding capability, and has low cost and is easy to inspect and maintain.

[0021] 2. The present invention drives the first wedge block to move, and then drives the first locking claw and the second locking claw to open relatively through the inclined surface cooperating with the first locking claw and the second locking claw, so as to unlock the locking rod; when the first wedge block releases the limit on the first locking claw, the elastic component can drive the first locking claw and the second locking claw to be relatively close to each other, so as to achieve the clamping and locking of the locking rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is one of the structural schematic diagrams of the ultra-precision liquid static pressure linear guide air-off self-locking clamp provided in an embodiment of the present invention.

[0024] Figure 2 It is a front view of an ultra-precision liquid hydrostatic linear guide air-cutting self-locking clamp provided in an embodiment of the present invention.

[0025] Figure 3 is Figure 2 The sectional view taken along line A-A in

[0026] Figure 4 is Figure 2 The sectional view taken along line B-B in

[0027] Figure 5 Fig. is the second structural schematic diagram of the ultra-precision hydrostatic linear guide air-off self-locking clamp provided by the embodiment of the present invention.

[0028] Figure 6 Fig. is the schematic diagram of the use state of the ultra-precision hydrostatic linear guide air-off self-locking clamp provided by the embodiment of the present invention.

[0029] Each reference numeral in the figure is as follows:

[0030] 1, base; 2, first locking claw; 3, second locking claw; 4, first wedge block; 5, elastic component; 6, locking rod; 7, driving component; 8, sleeve; 9, extension rod; 10, washer; 11, first limit set screw; 12, second limit set screw; 13, third limit set screw; 14, first rotating pin; 15, second rotating pin; 101, accommodation cavity; 21, first locking portion; 22, first through hole; 31, second locking portion; 41, second screw; 51, first screw; 52, disc spring; 101, air inlet hole; 102, cylinder piston connection hole; 211, first clamping block; 212, first semi-circular groove; 311, second clamping block; 312, second semi-circular groove; 2121, stripe protrusion; 401, first inclined surface; 402, second inclined surface; 511, screw; 512, screw head; 81, second wedge block. Detailed implementation manners

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected or indirectly connected to the other element.

[0033] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and does not indicate that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating relative importance or indicating the quantity of technical features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined. The following describes the specific implementation of the present invention in more detail with reference to specific embodiments:

[0035] As Figures 1 to 6 shown, an embodiment of the present invention provides a super-precision hydrostatic linear guide air-off self-locking clamp, including a base 1, a first locking claw 2, a second locking claw 3, a first wedge block 4, an elastic component 5, a locking rod 6, and a driving component 7; the first locking claw 2 is rotatably connected to the base 1, and the first locking claw 2 has a first locking portion 21; the second locking claw 3 is rotatably connected to the base 1, the second locking claw 3 is disposed opposite to the first locking claw 2, and the second locking claw 3 has a second locking portion 31; two opposite inclined surfaces of the first wedge block 4 respectively abut against the first locking claw 2 and the second locking claw 3; the elastic component 5 connects the first locking claw 2 and the second locking claw 3; the locking rod 6 is disposed between the first locking portion 21 and the second locking portion 31; the output end of the driving component 7 is connected to the first wedge block 4, and the driving component 7 is used to drive the first wedge block 4 to move, driving the first locking portion 21 and the second locking portion 31 to open relatively to release the locking rod 6, or the elastic component 5 drives the first locking portion 21 and the second locking portion 31 to close relatively to clamp and lock the locking rod 6.

[0036] Specifically, the working principle of this embodiment is as follows:

[0037] When it is necessary to unlock the locking rod 6, the driving assembly 7 can drive the first wedge block 4 to move forward. When the first wedge block 4 moves, since the inclined surfaces (i.e., the first inclined surface 401) on the first wedge block 4 are respectively connected and cooperated with the first locking claws 2 and the second locking claws 3 on both sides, the first locking claws 2 and the second locking claws 3 can be driven to move relatively away through this inclined surface, thereby causing a relative away movement between the first locking portion 21 and the second locking portion 31. At this time, the elastic component 5 is compressed, and finally the first locking portion 21 and the second locking portion 31 are separated from the contact with the locking rod 6, realizing the unlocking of the locking rod 6. At this time, the locking rod 6 can move along its length direction. Similarly, when it is necessary to lock the locking rod 6, the control driving assembly 7 drives the first wedge block 4 to move backward. When the first wedge block 4 moves, the first wedge block 4 releases the limiting effect on the first locking claws 2. Under the action of the elastic force provided by the elastic component 5, the first locking claws 2 move towards the direction close to the second locking claws 3, thereby causing the first locking portion 21 and the second locking portion 31 to hold the locking rod 6 tightly, realizing the locking of the locking rod 6. At this time, the locking rod 6 cannot move along its length direction.

[0038] In one embodiment, a sleeve 8 is further included. One end of the sleeve 8 abuts against the driving assembly 7, and a second wedge block 81 is provided at the other end of the sleeve 8. The two opposite inclined surfaces (i.e., the second inclined surface 402) of the second wedge block 81 respectively abut against the first locking claws 2 and the second locking claws 3. Specifically, the sleeve 8 is disposed opposite to the first wedge block 4, and the axis of the sleeve 8 coincides with the axis of the output end of the driving assembly 7. The second wedge block 81 is disposed on the opposite side of the first wedge block 4 along its moving direction. When the first wedge block 4 moves, the second wedge block 81 can support the first locking claws 2 and the second locking claws 3, thereby preventing the first locking claws 2 and the second locking claws 3 from shaking during the opening and closing process, so as to ensure the movement stability of the first locking claws 2 and the second locking claws 3. At the same time, since the second wedge block 81 is also connected and cooperated with the first locking claws 2 and the second locking claws 3 through inclined surfaces, when the first wedge block 4 moves, the supporting effect of the inclined surface of the second wedge block 81 on the first locking claws 2 and the second locking claws 3 can also facilitate the opening of the first locking claws 2 and the second locking claws 3.

[0039] In one embodiment, it also includes an extension rod 9, the drive assembly 7 is a cylinder, the extension rod 9 is inserted into the sleeve 8, one end of the extension rod 9 is connected to the output end of the cylinder, and the other end of the extension rod 9 is connected to the first wedge block 4. Specifically, the cylinder is provided with an air inlet 101, and it also has a cylinder piston connecting hole 102, the cylinder piston connecting hole 102 is used to connect with the extension rod 9, and the air inlet 101 is used to connect with the gas supply equipment to realize the supply and disconnection of gas. Furthermore, the first wedge block 4 is fastened to the extension rod 9 by a second screw 41, which is convenient for the disassembly and replacement of the first wedge block 4. Specifically, the drive assembly 7 is preferably a single-acting cylinder, and the piston rod of the single-acting cylinder retracts when ventilated and can be extended when the air is cut off, thereby driving the extension rod 9 to move along its length direction.

[0040] In one embodiment, a washer 10 is further included, and the washer 10 is disposed between the drive assembly 7 and the sleeve 8. By installing the washer 10, close contact between the second wedge block 81 on the sleeve 8 and the first locking claw 2 and the second locking claw 3 can be achieved.

[0041] In one embodiment, the elastic component 5 includes a first screw 51 and a disc spring 52, the first screw 51 includes a screw rod 511 and a screw head 512 connected to each other, the first locking claw 2 is provided with a first through hole 22, the first screw 51 passes through the first through hole 22 and is fastened to the second locking claw 3, the disc spring 52 is sleeved outside the screw rod 511, one end of the disc spring 52 abuts against the screw head 512, and the other end of the disc spring 52 abuts against the first locking claw 2. Specifically, when the first wedge block 4 drives the first locking claw 2 and the second locking claw 3 to open relatively, it will compress the disc spring 52, and the disc spring 52 will store the elastic force. When the first wedge block 4 releases the movement limit of the first locking claw 2, the first locking claw 2 can cooperate with the second locking claw 3 to clamp and fix the locking rod 6 under the action of the elastic force, so as to achieve the clamping and locking of the locking rod 6. The disc spring 52 can also provide elastic force support in the subsequent locking state to ensure the locking effect of the first locking claw 2 and the second locking claw 3.

[0042] In one embodiment, it further includes a first position-limiting top screw 11 and a second position-limiting top screw 12, the base 1 is provided with an accommodating cavity, the ends of the first locking claw 2 and the second locking claw 3 are provided in the accommodating cavity, the first position-limiting top screw 11 is threadedly connected to the base 1 and the end thereof abuts against the first locking claw 2, and the second position-limiting top screw 12 is threadedly connected to the base 1 and the end thereof abuts against the second locking claw 3. Specifically, by adjusting the fastening length of the first position-limiting top screw 11, the movable distance of the first locking claw 2 can be adjusted, and by adjusting the fastening length of the second position-limiting top screw 12, the movable distance of the second locking claw 3 can be adjusted, and finally the opening and closing angles of the first locking claw 2 and the second locking claw 3 can be adjusted.

[0043] In one embodiment, a third limiting set screw 13 is further included. The third limiting set screw 13 is threadedly connected to the first clamping jaw 2 and its end abuts against the second clamping jaw 3. Specifically, by adjusting the fastening length of the third limiting set screw 13, the adjustable opening and closing angle between the first locking jaw 2 and the second locking jaw 3 can be achieved.

[0044] In one embodiment, a first rotating pin 14 and a second rotating pin 15 are further included. The first rotating pin 14 rotatably connects the first clamping jaw 2 and the base 1, and the second rotating pin 15 rotatably connects the second clamping jaw 3 and the base 1. Specifically, the first clamping jaw 2 can perform a rotational movement centered on the first rotating pin 14, and the second clamping jaw 3 can perform a rotational movement centered on the second rotating pin 15.

[0045] In one embodiment, the first locking portion 21 includes a first clamping block 211, and the first clamping block 211 is provided with a first semi-circular groove 212. The second locking portion 31 includes a second clamping block 311, and the second clamping block 311 is provided with a second semi-circular groove 312. The locking rod 6 is disposed between the first semi-circular groove 212 and the second semi-circular groove 312.

[0046] In one embodiment, a plurality of stripe protrusions 2121 are provided on the inner wall surface of the first semi-circular groove 212, and / or a stripe protrusion 2121 is provided on the inner wall surface of the second semi-circular groove 312. By providing the stripe protrusions 2121, the surface contact friction between the inner wall surface of the first semi-circular groove 212 / second semi-circular groove 312 and the locking rod 6 can be increased, the locking effect on the locking rod 6 can be improved, and the sliding of the locking rod 6 in the locked state can be avoided. To ensure that even under vibration or other external disturbances, a stable locking state can be maintained, and the self-locking performance and positioning accuracy of the system are improved.

[0047] In one embodiment, a first fixing hole is provided on the first wedge block 4, and a first anti-rotation pin 16 is inserted into the first fixing hole. The first anti-rotation pin 16 is used to limit the circumferential rotational movement of the first wedge block 4. A second fixing hole is provided on the second wedge block 81, and a second anti-rotation pin 17 is inserted into the second fixing hole. The second anti-rotation pin 17 is used to limit the circumferential rotational movement of the second wedge block 81.

[0048] Specifically, the specific implementation manner of this embodiment is as follows:

[0049] When the single-acting cylinder (drive assembly 7) is ventilated, the extension rod 9 drives the first wedge block 4 to move towards the second wedge block 81. Through the contact surfaces of the first wedge block 4 with the first locking claw 2 and the second locking claw 3, the two locking claws are pushed apart to both sides. The two locking claws swing left and right respectively with the rotating pin as the reference point. The limit movement stroke is determined by the first limit set screw, the second limit set screw, and the third limit set screw. At this time, the disc spring produces a compressive deformation, and the first locking claw 2 and the second locking claw 3 open and disengage from the locking rod 6, enabling the guide rail workbench connected to the locking rod 6 to work smoothly. After the single-acting cylinder is de-ventilated, the extension rod 9 loses the pulling force of the rear inclined block and rebounds. At this time, the disc spring also produces a rebound deformation, releasing the movement stroke, so that the first locking claw 2 and the second locking claw 3 close and hold the locking rod 6 tightly, realizing the braking of the guide rail workbench. In addition, solenoid valves, pressure sensors and other methods can be used to control the ventilation and de-ventilation of the single-acting cylinder, so as to realize the power-off, liquid-off, and air-off self-locking of the clamp.

[0050] Compared with the prior art, the advantages of the present invention are as follows: The embodiments of the present invention are applicable to low-load and small-moment-of-inertia working conditions such as ultra-precision hydrostatic linear guides. The mechanical claw structure is adopted, and the symmetrical pressing force can effectively avoid the bending and torsional forces borne by the hydraulic guide rail during braking. Moreover, even in the case of power or other control system failures, a reliable self-locking function can be realized, providing very precise position holding ability, and having low cost and being easy to inspect and maintain.

[0051] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A super-precision hydrostatic linear guide air-off self-locking clamp, characterized in that, Comprising: Base; First locking claw, rotatably connected to the base, the first locking claw having a first locking portion; Second locking claw, rotatably connected to the base, the second locking claw being disposed opposite to the first locking claw, the second locking claw having a second locking portion; First wedge block, two opposite inclined surfaces of the first wedge block respectively abutting against the first locking claw and the second locking claw; Elastic component, connecting the first locking claw and the second locking claw; Locking rod, disposed between the first locking portion and the second locking portion; Drive assembly, an output end of the drive assembly being connected to the first wedge block, the drive assembly being configured to drive the first wedge block to move, driving the first locking portion and the second locking portion to open relatively to release the locking rod, or, the elastic component driving the first locking portion and the second locking portion to close relatively to clamp and lock the locking rod.

2. The air cut-off self-locking clamping device for the ultra-precision hydrostatic linear guide rail according to claim 1, wherein, Further comprising a sleeve, one end of the sleeve abutting against the drive assembly, the other end of the sleeve being provided with a second wedge block, two opposite inclined surfaces of the second wedge block respectively abutting against the first locking claw and the second locking claw.

3. The ultra-precision hydrostatic linear guide air-off self-locking clamping device according to claim 2, characterized in that, Further comprising an extension rod, the drive assembly being a cylinder, the extension rod passing through the sleeve, one end of the extension rod being connected to the output end of the cylinder, the other end of the extension rod being connected to the first wedge block.

4. The ultra-precision hydrostatic linear guide air-off self-locking clamp as claimed in claim 2, wherein Further comprising a washer, the washer being disposed between the drive assembly and the sleeve.

5. The ultra-precision hydrostatic linear guide air-off self-locking clamp as described in claim 1, characterized in that, The elastic component includes a first screw and a disc spring, the first screw including a screw rod and a screw head connected to each other, the first locking claw being provided with a first through hole, the first screw passing through the first through hole and being fixedly connected to the second locking claw, the disc spring being sleeved outside the screw rod, one end of the disc spring abutting against the screw head, the other end of the disc spring abutting against the first locking claw.

6. The ultra-precision hydrostatic linear guide air-off self-locking clamp as claimed in claim 1, wherein, Further comprising a first limit set screw and a second limit set screw, the base being provided with a receiving cavity, ends of the first locking claw and the second locking claw being disposed in the receiving cavity, the first limit set screw being threadedly connected to the base and an end thereof abutting against the first locking claw, the second limit set screw being threadedly connected to the base and an end thereof abutting against the second locking claw.

7. The ultra-precision hydrostatic linear guide air-off self-locking clamp as claimed in claim 1, wherein Further comprising a third limit set screw, the third limit set screw being threadedly connected to the first clamping claw and an end thereof abutting against the second clamping claw.

8. The air-off self-locking clamping device for the ultra-precision hydrostatic linear guide rail according to claim 1, characterized in that Further comprising a first rotating pin and a second rotating pin, the first rotating pin rotatably connecting the first clamping claw and the base, the second rotating pin rotatably connecting the second clamping claw and the base.

9. The ultra-precision hydrostatic linear guide air cut-off self-locking clamp as described in claim 1, characterized in that, The first locking portion includes a first clamping block, the first clamping block being provided with a first semi-circular groove, the second locking portion includes a second clamping block, the second clamping block being provided with a second semi-circular groove, the locking rod being disposed between the first semi-circular groove and the second semi-circular groove.

10. The ultra-precision hydrostatic linear guide air-off self-locking clamping device according to claim 1, characterized in that, The inner wall surface of the first semi-circular groove is provided with a plurality of stripe protrusions, and / or, the inner wall surface of the second semi-circular groove is provided with stripe protrusions.

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