Shockproof flexible locking mechanism capable of eliminating micro-gap of lead screw

Abstract

The utility model discloses a shockproof flexible locking mechanism capable of eliminating lead screw micro clearance, which comprises a lead screw, a lead screw threaded seat is arranged on the lead screw, a lead screw nut is arranged on one side of the lead screw threaded seat, and a clearance lead screw fixing seat is arranged on one side of the lead screw nut far away from the lead screw threaded seat. A first clamping block is arranged on the portion, located on one side of the lead screw, of the lower portion of the gap lead screw fixing base, a second clamping block is arranged on the side, away from the first clamping block, of the lead screw, a mounting plate is arranged on the side, away from the lead screw, of the second clamping block, and the mounting plate is fixedly connected with the second clamping block and the first clamping block through long bolts. The long bolt is located between the second clamping block and the first clamping block and sleeved with a spring, and an oil cylinder is arranged on the side, away from the second clamping block, of the mounting plate. According to the locking mechanism, the influence of vibration on a transmission system is reduced, an axial gap and a radial gap can be adjusted and compensated, and the workpiece machining accuracy of machining equipment is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical drive technical field, especially relate to a kind of eliminate screw rod micro-gap shock-absorbing flexible locking mechanism. BACKGROUND

[0002] In screw rod transmission system, the tiny gap between screw rod and nut is a long-standing problem in the industry. During equipment operation, these micro-gaps can cause transmission accuracy to decrease, leading to position deviation. For example, in precision machine tool machining, screw rod micro-gap may cause the actual cutting position of the tool to deviate from the expected position, thereby affecting the dimensional accuracy and surface quality of the machined parts. Moreover, external vibrations and vibrations generated by the equipment itself can further exacerbate the adverse effects of micro-gaps, and even cause abnormal wear of the screw rod and nut, greatly shortening the service life of the equipment. Traditional screw rod locking methods are mostly rigid locking, which can limit the movement of the screw rod to some extent, but cannot effectively eliminate micro-gaps. In a vibrating environment, rigid locking mechanisms are prone to damage due to stress concentration, making it difficult to meet the stringent requirements of modern high-precision and high-stability equipment for screw rod transmission systems. Therefore, we propose a kind of eliminate screw rod micro-gap shock-absorbing flexible locking mechanism. SUMMARY

[0003] To solve the above problems, the utility model provides a kind of eliminate screw rod micro-gap shock-absorbing flexible locking mechanism. The utility model solves the problem that traditional screw rod locking methods are mostly rigid locking, which can limit the movement of the screw rod to some extent, but cannot effectively eliminate micro-gaps. In a vibrating environment, rigid locking mechanisms are prone to damage due to stress concentration, making it difficult to meet the stringent requirements of modern high-precision and high-stability equipment for screw rod transmission systems.

[0004] The utility model discloses a kind of eliminate screw rod micro-gap shock-absorbing flexible locking mechanism, including screw rod, the screw rod is equipped with screw rod thread seat, the screw rod thread seat one side is equipped with screw rod nut, the screw rod nut is equipped with gap screw rod fixed seat away from screw rod thread seat side, the gap screw rod fixed seat below is located screw rod one side and is equipped with first clamping block, the screw rod is equipped with second clamping block away from first clamping block side, the first clamping block and second clamping block top are equipped with slider, the gap screw rod fixed seat below is equipped with with slider matching guide groove, the second clamping block is equipped with mounting plate away from screw rod side, the mounting plate is fixedly connected by long bolt between second clamping block and first clamping block, long bolt is sleeved with spring between second clamping block and first clamping block, second clamping block and first clamping block are equipped with with spring matching through slot, the mounting plate is equipped with oil cylinder away from second clamping block side, oil cylinder stroke end is fixedly connected with second clamping block by penetrating mounting plate.

[0005] The first clamping block is provided with a fastening nut matched with the long bolt on the side away from the screw rod.

[0006] The gap screw rod fixing seat is provided with a limiting plate on each side, and the limiting plate is fixedly connected with the gap screw rod fixing seat through a short bolt.

[0007] The first installation groove is arranged above the screw rod threaded seat, and a threaded seat flat key is arranged in the first installation groove.

[0008] The second installation groove is arranged in the middle of the upper portion of the gap screw rod fixing seat, and a fixing seat flat key is arranged in the second installation groove.

[0009] The first clamping block and the second clamping block are provided with inner threads matched with the screw rod on the inner sides, and the inner threads are cast with PU engineering plastics.

[0010] The utility model discloses a kind of eliminate screw rod micro-gap shock-absorbing flexible locking mechanisms, oil cylinder is pushed to second clamping block, long bolt pulls first clamping block, so that first clamping block is close to the center position of screw rod, at this moment, first clamping block and second clamping block tightly hold and lock screw rod, first clamping block and second clamping block have no axial and radial gap with screw rod, to effectively eliminate the gap between transmission system, under the pressure of oil cylinder, PU engineering plastics and screw rod contact surface produce certain deformation, perfectly fill radial and axial gap, simultaneously, PU engineering plastics can buffer the contact surface between first clamping block and second clamping block and screw rod, reduce the influence of vibration on transmission system. This kind of locking mechanism structure is simple, reduce the influence of vibration on transmission system, axial and radial gap can be adjusted and supplemented, effectively improve the precision of workpiece processing of processing equipment. BRIEF DESCRIPTION OF DRAWINGS

[0011] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0012] Fig. 1 It is the structural schematic diagram of the utility model;

[0013] Fig. 2 It is the explosion structural schematic diagram of the utility model.

[0014] In the figure: 1, lead screw 2, lead screw threaded seat 3, lead screw nut 4, gap lead screw fixed seat 5, the first clamping block 6, the second clamping block 7, sliding block 8, guide groove 9, mounting plate 10, long bolt 11, spring 12, oil cylinder 13, fastening nut 14, limit plate 15, short bolt 16, the first installation groove 17, threaded seat flat key 18, the second installation groove 19, fixed seat flat key. DETAILED DESCRIPTION

[0015] The specific embodiments of the utility model are further described below in combination with the drawings and examples. The following examples are only used to more clearly illustrate the technical scheme of the utility model, and cannot limit the protection scope of the utility model.

[0016] As Figs. 1-2 shown, the utility model is a kind of eliminate flexible locking mechanism of shock absorption of micro-gap of screw rod, including lead screw 1, the lead screw 1 is equipped with lead screw threaded seat 2, the lead screw threaded seat 2 one side is equipped with lead screw nut 3, lead screw threaded seat 2 and lead screw nut 3 are all with lead screw 1 thread connection, the lead screw nut 3 is equipped with gap lead screw fixed seat 4 away from lead screw threaded seat 2 side, the gap lead screw fixed seat 4 below is located lead screw 1 one side and is equipped with the first clamping block 5, the lead screw 1 is equipped with the second clamping block 6 away from the first clamping block 5 side, the first clamping block 5 and the second clamping block 6 above are all equipped with sliding block 7, the gap lead screw fixed seat 4 below is equipped with the guide groove 8 matched with sliding block 7, sliding block 7 section is inverted trapezoidal, sliding block 7 can slide inside guide groove 8, by the mutual cooperation between sliding block 7 and guide groove 8, so that the first clamping block 5 and the second clamping block 6 can move in horizontal direction on the both sides of lead screw 1, the second clamping block 6 is equipped with mounting plate 9 away from lead screw 1 side, the mounting plate 9 is fixedly connected through long bolt 10 between the second clamping block 6 and the first clamping block 5, spring 11 is sleeved between long bolt 10 between the second clamping block 6 and the first clamping block 5, the through slot matched with spring 11 is formed in the second clamping block 6 and the first clamping block 5, the oil cylinder 12 is equipped with mounting plate 9 away from the second clamping block 6 side, the oil cylinder 12 stroke end is fixedly connected with the second clamping block 6, when injecting pressure oil in the rear cavity of oil cylinder 12, the oil cylinder 12 stroke end moves in horizontal direction, the oil cylinder 12 stroke end pushes the second clamping block 6, until the second clamping block 6 is pressed against screw rod 1, at this time, the end surface of oil cylinder 12 is spaced apart from mounting plate 9 under the stroke end thrust, and simultaneously pulls mounting plate 9 to move, simultaneously, long bolt 10 pulls the first clamping block 5, so that the first clamping block 5 is close to the central position of screw rod 1, at this moment, the first clamping block 5 and the second clamping block 6 tightly hold and lock screw rod 1, the first clamping block 5 and the second clamping block 6 have no axial and radial gap with screw rod 1.

[0017] The first clamping block 5 is provided with a fastening nut 13 matched with the long bolt 10 on the side away from the lead screw 1, and the first clamping block 5 and the second clamping block 6 can be stably clamped on the outer side of the lead screw 1 through the cooperation between the fastening nut 13 and the long bolt 10.

[0018] The gap lead screw fixing seat 4 is provided with a limiting plate 14 on both sides, the limiting plate 14 is fixedly connected with the gap lead screw fixing seat 4 through a short bolt 15, and the limiting plate 14 can limit the movement of the first clamping block 5 and the second clamping block 6.

[0019] The first installation groove 16 is arranged on the upper side of the lead screw threaded seat 2, the threaded seat flat key 17 is arranged in the first installation groove 16, and the lead screw threaded seat 2 is fixedly connected with the sliding table through the threaded seat flat key 17.

[0020] The second installation groove 18 is arranged on the upper middle part of the gap lead screw fixing seat 4, the fixing seat flat key 19 is arranged in the second installation groove 18, and the gap lead screw fixing seat 4 is fixedly connected with the sliding table through the fixing seat flat key 19.

[0021] The first clamping block 5 and the second clamping block 6 are provided with internal threads matched with the lead screw 1 on the inner sides, the inner wall of the internal thread is cast with PU engineering plastic, the thickness of the PU engineering plastic is 1 mm, a certain deformation amount is generated on the contact surface between the PU engineering plastic and the lead screw 1 under the pressure of the oil cylinder 12, the radial and axial gaps are perfectly filled, the contact surface between the first clamping block 5, the second clamping block 6 and the lead screw 1 can be buffered by the PU engineering plastic, and the influence of vibration on the transmission system is reduced.

[0022] Specifically, in the utility model, the oil cylinder 12 pushes the second clamping block 6 at the stroke end until the second clamping block 6 abuts against the lead screw 1, at this time, the end surface of the oil cylinder 12 generates a spacing with the mounting plate 9 under the stroke end thrust, and simultaneously pulls the mounting plate 9 to move, simultaneously, the long bolt 10 pulls the first clamping block 5, so that the first clamping block 5 approaches the central position of the lead screw 1, at this moment, the first clamping block 5 and the second clamping block 6 tightly hold and lock the lead screw 1, the first clamping block 5 and the second clamping block 6 have no axial and radial gaps with the lead screw 1, so that the gaps between the transmission systems are effectively eliminated, the inner wall of the internal thread is cast with PU engineering plastic, the thickness of the PU engineering plastic is 1 mm, a certain deformation amount is generated on the contact surface between the PU engineering plastic and the lead screw 1 under the pressure of the oil cylinder 12, the radial and axial gaps are perfectly filled, the contact surface between the first clamping block 5, the second clamping block 6 and the lead screw 1 can be buffered by the PU engineering plastic, and the influence of vibration on the transmission system is reduced.

[0023] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A flexible locking mechanism for eliminating the micro-gap of a lead screw, comprising a lead screw (1), characterized in that, The screw rod (1) is provided with a screw rod threaded seat (2), one side of the screw rod threaded seat (2) is provided with a screw rod nut (3), the screw rod nut (3) is provided with a gap screw rod fixing seat (4) away from one side of the screw rod threaded seat (2), the first clamping block (5) is arranged below the gap screw rod fixing seat (4) on one side of the screw rod (1), the second clamping block (6) is arranged away from one side of the screw rod (1) of the first clamping block (5), the slide block (7) is arranged above the first clamping block (5) and the second clamping block (6), the guide groove (8) matched with the slide block (7) is arranged below the gap screw rod fixing seat (4), the mounting plate (9) is arranged away from one side of the screw rod (1) of the second clamping block (6), the mounting plate (9) is fixedly connected with the second clamping block (6) and the first clamping block (5) through the long bolt (10), the spring (11) is sleeved between the long bolt (10) and the first clamping block (5), the through groove matched with the spring (11) is arranged on the second clamping block (6) and the first clamping block (5), the oil cylinder (12) is arranged away from one side of the second clamping block (6) of the mounting plate (9), and the oil cylinder (12) is fixedly connected with the second clamping block (6) through the stroke end penetrating the mounting plate (9).

2. The flexible locking mechanism for eliminating the micro-gap of the lead screw according to claim 1, characterized in that, The first clamping block (5) is provided with a fastening nut (13) matched with the long bolt (10) away from one side of the screw rod (1).

3. The flexible locking mechanism for eliminating the micro-gap of the lead screw according to claim 1, characterized in that, The gap screw rod fixing seat (4) is provided with a limiting plate (14) on both sides, and the limiting plate (14) is fixedly connected with the gap screw rod fixing seat (4) through the short bolt (15).

4. The flexible locking mechanism for eliminating the backlash of the lead screw according to claim 1, wherein The screw rod threaded seat (2) is provided with a first mounting groove (16) above, and the first mounting groove (16) is provided with a threaded seat flat key (17).

5. The flexible locking mechanism for eliminating the backlash of the screw rod according to claim 1, characterized in that, The gap screw rod fixing seat (4) is provided with a second mounting groove (18) above the middle part, and the second mounting groove (18) is provided with a fixing seat flat key (19).

6. The flexible locking mechanism for eliminating the backlash of the lead screw according to claim 1, wherein The first clamping block (5) and the second clamping block (6) are provided with internal threads matched with the screw rod (1) on the inner sides, and the inner wall of the internal thread is cast with PU engineering plastic.

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