Ultra-long stroke lead screw supporting structure

Abstract

The invention discloses an ultra-long stroke lead screw supporting structure which is composed of an outer cover shell, a sliding seat and a plurality of supporting seats used for dispersing the self weight of a long lead screw and friction force in movement and reducing droop and shaking of the long lead screw. The two sets of supporting seats are located on the two sides of the sliding seat correspondingly and connected with the long lead screw in a rolling and sleeving mode through arranged second lead screw nuts, an elastic boss is installed at the bottom end of the middle of each supporting seat, and a boss unlocking mechanism composed of a first pin matched with a first spring is installed on the side, away from the end of the outer cover shell, of the supporting seat. And meanwhile, a second drag hook is further installed on one side of the supporting base, drag hook holes are formed in the other side of the supporting base and the two sides of the elastic boss, and the ultra-long-stroke lead screw supporting structure effectively solves the problems that a long-stroke lead screw droops and shakes, the service life of a module is prolonged, and the service life of the module is prolonged. And the number of the supporting seats can be flexibly added according to the length of the lead screw, so that the supporting structure can be suitable for the lead screw length and stroke requirements of different modules.

Description

Technical Field

[0001] The invention relates to the technical field of screw rod modules, and in particular to an ultra-long stroke screw rod support structure. Background Art

[0002] In various linear module application scenarios that require high-precision and long-stroke motion, such as precision machinery, semiconductor equipment, and automation equipment, the screw is a key transmission component, and its performance plays a decisive role in the operation of the entire module. However, when the screw stroke is long, the screw's own weight and the friction generated during the long-stroke movement will cause a series of problems. Among them, the screw is prone to sagging, making it difficult to ensure the straightness of the screw during operation, resulting in a decrease in the positioning accuracy of the module. At the same time, the shaking problem also follows, which not only affects the smooth operation of the screw, but also further aggravates the wear between the screw and other components, greatly shortening the service life of the module. Summary of the invention

[0003] The purpose of the present invention is to provide an ultra-long stroke screw support structure to solve the problems raised by the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an ultra-long stroke lead screw support structure, which is composed of an outer cover shell, a sliding seat and a plurality of support seats for dispersing the deadweight of the lead screw and the friction force in the movement and reducing the sagging and shaking of the lead screw, wherein a lead screw bearing frame is installed at one end inside the outer cover shell, a driving motor is installed at the other end inside the outer cover shell, the output shaft of the driving motor is connected to the lead screw, one end of the lead screw is rotatably connected to the lead screw bearing frame with a matching bearing, two linear guide rails are also installed inside the outer cover shell, and a plurality of shuttle-shaped limiting grooves are opened inside the shell bottom of the outer cover shell;

[0005] The sliding seat is rollingly sleeved with the long lead screw through a first screw nut installed inside, and a plurality of first linear sliders are fixedly connected on both sides of the bottom of the sliding seat, and the first linear slider is slidably connected to the linear guide rail, and a first hook is fixedly installed on both ends of the sliding seat; the plurality of support seats are divided into two groups, and the two groups of support seats are respectively located on both sides of the sliding seat and rollingly sleeved with the long lead screw through a second screw nut provided, and an elastic boss is installed at the middle bottom end of each support seat, and a boss unlocking mechanism composed of a first pin and a first spring is installed on one side of the support seat away from the end of the outer cover shell, and at the same time, one side of the support seat A second hook is also installed, and hook holes are provided on the other side of the support seat and on both sides of the elastic boss; when the sliding seat reciprocates with the long screw rod, a group of support seats in the opposite direction of its movement are unfolded one by one, the boss unlocking mechanism unlocks the elastic boss, and the elastic boss of each support seat moves to the corresponding limiting groove and stays there, the second hooks of the adjacent support seats are disengaged from their hook holes, and a group of support seats in the same direction of its movement are retracted one by one, the boss unlocking mechanism locks the elastic boss, the elastic boss of each support seat is retracted from the limiting groove, and the first hook and the second hook are both inserted into the corresponding hook holes.

[0006] As a preferred solution of the present invention: the number of the support seats is an even number of pairs, and the number of support seats is at least two, and the length of the filament rod is greater than 1.5 m.

[0007] As a preferred solution of the present invention: a dust cover is installed on the top of the outer cover shell, and the two side ends of the sliding seat are placed outside the dust cover.

[0008] As a preferred solution of the present invention: the bottoms of both ends of the support seat are fixedly connected with second linear sliders, and the second linear sliders are slidably connected to the linear guide rails.

[0009] As a preferred solution of the present invention: the elastic boss is installed in a groove provided at the middle bottom end of the support seat, and the bottom end of the elastic boss is fixedly connected with a spherical protrusion that can slide or limit in the limiting groove, and the spherical protrusion is made of nylon.

[0010] As a preferred solution of the present invention: the boss unlocking mechanism also includes a first pin hole opened in the middle of the elastic boss and on both sides of the support seat and used to accommodate a first pin and a first spring, a ring is embedded in the interior of the first pin hole, the first pin is a cross-shaped pin, one end of the first pin passes through the ring and is placed outside the support seat, and the first spring is sleeved on the other end of the first pin and placed inside the first pin hole.

[0011] As a preferred solution of the present invention: second pins are fixedly connected to both sides of the top of the elastic boss, one end of the second pin is inserted into a second pin hole provided at the bottom of the slot, and a second spring is sleeved on the outside of the second pin.

[0012] As a preferred solution of the present invention: bearing mounting grooves are provided on both sides of the top of the support seat, and a rubber-coated bearing with a shaft is installed inside the bearing mounting groove. The shaft of the rubber-coated bearing is fixedly connected to the support seat by screws, and the rubber-coated bearing is in rolling contact with the inner side of the dust cover.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1) The ultra-long stroke screw support structure of the present invention has multiple support seats distributed in groups on both sides of the sliding seat, and the second screw nut is rolled and sleeved with the long screw, which effectively disperses the deadweight and movement friction of the long screw, greatly reduces the probability of the screw sagging and shaking, and significantly improves the accuracy and operation stability of the module. The elastic boss at the bottom end of the middle part of the support seat cooperates with the shuttle-shaped limiting groove at the bottom of the outer cover shell, and then the boss unlocking mechanism and the hook and the hook hole cooperate, so that the sliding seat can realize the orderly expansion and contraction of the support seat during the reciprocating motion, and accurately and efficiently supports the screw stably;

[0015] 2) The second linear sliders at the bottom of both ends of the support seat of the present invention slide with the linear guide rails, which further improves the stability of the support seat when moving, ensuring the stability of the support during the entire screw operation process. The rubber-coated bearing with a shaft installed on the top of the support seat is in rolling contact with the inner side of the dust cover. While ensuring that the support seat can move smoothly, the dust cover cooperates with the outer cover shell to provide a better dust-proof effect for the module, protect the internal long screw and screw nut and other components, and increase the service life of the module;

[0016] 3) The ultra-long stroke screw support structure of the present invention not only effectively solves the problem of long stroke screw sagging and shaking, and prolongs the service life of the module, but also can flexibly increase the number of support seats according to the length of the screw, so that the support structure can be suitable for the screw length and stroke requirements of different modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the internal structure of the outer casing of the present invention;

[0019] Figure 3 It is a schematic diagram of the support base of the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of the sliding seat of the present invention;

[0021] Figure 5 It is a schematic diagram of the support base structure of the present invention;

[0022] Figure 6 This is one of the structural schematic diagrams of the support base of the present invention;

[0023] Figure 7 It is a schematic diagram of the elastic boss structure of the present invention;

[0024] Figure 8 It is a schematic diagram of the slotting structure of the present invention;

[0025] Fig. 9 It is a schematic diagram of the structure of the boss unlocking mechanism of the present invention.

[0026] In the figure: 100, outer cover shell; 110, screw bearing frame; 120, drive motor; 130, long screw; 140, linear guide; 150, limiting groove; 160, dust cover; 200, sliding seat; 210, first screw nut; 220, first linear slider; 230, first hook; 300, support seat; 310, second screw nut; 320, elastic boss; 321, slot; 322, spherical protrusion; 330, second hook; 340, hook hole; 350, second linear slider; 360, second pin; 370, second pin hole; 380, second spring; 390, bearing mounting groove; 400, rubber-coated bearing; 500, boss unlocking mechanism; 510, first pin; 520, first spring; 530, first pin hole; 540, collar. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Example

[0029] See also Figure 1-9The present invention provides a technical solution: an ultra-long stroke screw support structure, comprising an outer cover shell 100, a sliding seat 200 and a plurality of support seats 300 for dispersing the self-weight and friction force of the long screw 130 during movement and reducing the sagging and shaking of the long screw 130, wherein a screw bearing frame 110 is installed at one end of the inner part of the outer cover shell 100, a driving motor 120 is installed at the other end of the inner part of the outer cover shell 100, the output shaft of the driving motor 120 is connected to the long screw 130, one end of the long screw 130 is rotatably connected to the screw bearing frame 110 with a bearing, two linear guide rails 140 are also installed inside the outer cover shell 100, and a plurality of shuttle-shaped limiting grooves 150 are opened inside the shell bottom of the outer cover shell 100;

[0030] The sliding seat 200 is rollingly sleeved with the long screw rod 130 through the first screw nut 210 installed inside. A plurality of first linear sliders 220 are fixedly connected to both sides of the bottom of the sliding seat 200. The first linear sliders 220 are slidably connected to the linear guide rail 140. First hooks 230 are fixedly installed at both ends of the sliding seat 200.

[0031] The multiple support seats 300 are divided into two groups. The two groups of support seats 300 are respectively located on both sides of the sliding seat 200 and are rollingly sleeved with the long screw 130 through the second screw nut 310. The middle bottom end of each support seat 300 is installed with an elastic boss 320. The side of the support seat 300 away from the end of the outer cover shell 100 is installed with a boss unlocking mechanism 500 composed of a first pin 510 and a first spring 520. At the same time, a second hook 330 is also installed on one side of the support seat 300. The other side of the support seat 300 and both sides of the elastic boss 320 are provided with hook holes 340.

[0032] When the sliding seat 200 slides back and forth on the long screw rod 130, a group of support seats 300 in the opposite direction of its movement are unfolded one by one, the boss unlocking mechanism 500 unlocks the elastic boss 320, and the elastic boss 320 of each support seat 300 moves to the corresponding limiting groove 150 and then stays there, the second hook 330 of the adjacent support seat 300 is disengaged from its hook hole 340, and a group of support seats 300 in the same direction of its movement are retracted one by one, the boss unlocking mechanism 500 locks the elastic boss 320, the elastic boss 320 of each support seat 300 is retracted from the limiting groove 150, and the first hook 230 and the second hook 330 are both inserted into the corresponding hook hole 340.

[0033] Specifically, when the drive motor 120 is started, the output shaft of the drive motor 120 drives the long lead screw 130 to start rotating. Under the rotation drive of the long lead screw 130, the sliding seat 200 performs reciprocating linear motion along the linear guide rail 140. Then, the first linear slider 220 is slidably cooperated with the linear guide rail 140 to effectively ensure the smooth movement of the sliding seat 200.

[0034] When the sliding seat 200 slides back and forth on the long screw rod 130, the long screw rod 130 cooperates with the second screw nut 310 to also drive the two groups of support seats 300 to move, and the group of support seats 300 in the opposite direction of the movement of the sliding seat 200 begins to play a role, and this group of support seats 300 begins to unfold one by one. At this time, one end of the first pin 510 is no longer squeezed by the adjacent support seat 300, so that the first pin 510 is disengaged from the first pin hole 530 under the action of the first spring 520, thereby unlocking the elastic boss 320 so that the elastic boss 320 can extend downward, and when the support seat 300 moves to the corresponding position of the limiting groove 150, the spherical protrusion 322 of the elastic boss 320 falls into the limiting groove 150, and the support seat 300 It stays here, and at the same time, the second hook 330 of the adjacent support seat 300 is disengaged from its hook hole 340, continues to move, and makes the spherical protrusion 322 fall into the next limiting groove 150, thereby supporting the long screw rod 130, dispersing its own weight and movement friction, and reducing the shaking of the long screw rod 130; and a group of support seats 300 with the same movement direction as the sliding seat 200 are retracted one by one, and when the adjacent support seats 300 are pressed tightly, the first pin 510 of the boss unlocking mechanism 500 will be inserted into the first pin hole 530, at this time the elastic boss 320 is locked, and the elastic boss 320 is retracted from the limiting groove 150, and the first hook 230 and the second hook 330 are inserted into the corresponding hook holes 340, preparing for the next unfolding action.

[0035] In this embodiment, the number of the support bases 300 is an even number of pairs, and there are at least two support bases 300 . The length of the filament rod 130 is greater than 1.5 m.

[0036] Specifically, an even number of pairs of support seats 300 are distributed on both sides of the sliding seat 200, which can more evenly disperse the weight of the long lead screw 130 and the friction generated by the movement. At the same time, multiple support seats 300 can support the lead screw at different positions when unfolded, and multiple stable fulcrums are built under the long lead screw 130, so that the lead screw is more evenly stressed during operation, reducing the possibility of sagging and shaking, thereby ensuring the high-precision operation of the module and meeting the application scenarios with high high-precision requirements such as precision machinery and semiconductor equipment.

[0037] In this embodiment, a dust cover 160 is installed on the top of the outer housing 100 , and both side ends of the sliding seat 200 are placed outside the dust cover 160 .

[0038] Specifically, when the sliding seat 200 makes reciprocating linear motion on the long lead screw 130, the dust cover 160 and the outer cover shell 100 together form a relatively closed space, and external dust, impurities, etc. are difficult to enter the interior of the module, thereby preventing dust particles from adhering to key components such as the long lead screw 130, the lead screw nut and the linear guide 140, thereby ensuring the long-term stable operation of the module and extending the service life of the module.

[0039] In this embodiment, the bottoms of both ends of the support seat 300 are fixedly connected with second linear sliders 350 , and the second linear sliders 350 are slidably connected to the linear guide rails 140 .

[0040] Specifically, when the support seat 300 moves with the rotation of the long lead screw 130 and the movement of the sliding seat 200, the second linear slider 350 can slide smoothly along the linear guide rail 140, ensuring the stability of the posture of the support seat 300 during the movement, thereby ensuring the stability and reliability of the support for the long lead screw 130.

[0041] In this embodiment, the elastic boss 320 is installed in a groove 321 provided at the middle bottom end of the support seat 300. The bottom end of the elastic boss 320 is fixedly connected with a spherical protrusion 322 that can slide or limit in the limiting groove 150. The spherical protrusion 322 is made of nylon.

[0042] Specifically, the spherical protrusion 322 made of nylon material has good wear resistance and certain supporting elasticity. When the support seat 300 moves to the corresponding position of the limiting groove 150 along with the movement of the filament rod 130, when the spherical protrusion 322 contacts the shuttle-shaped limiting groove 150, it can adapt to the shape change of the limiting groove 150 by utilizing its elastic effect, achieve a close fit, and then accurately limit the position of the support seat 300, thereby ensuring that the filament rod 130 is stably supported at this position.

[0043] In this embodiment, the boss unlocking mechanism 500 also includes a first pin hole 530 opened in the middle of the elastic boss 320 and on both sides of the support seat 300 and used to accommodate the first pin 510 and the first spring 520. A ring 540 is embedded in the interior of the first pin hole 530. The first pin 510 is a cross-shaped pin. One end of the first pin 510 passes through the ring 540 and is placed on the outside of the support seat 300. The first spring 520 is sleeved on the other end of the first pin 510 and is placed inside the first pin hole 530.

[0044] Specifically, when the support seats 300 are brought close to each other, the adjacent support seats 300 will press against the first pin 510 and compress the first spring 520, while inserting the first pin 510 into the first pin hole 530, re-locking the elastic boss 320 and retracting it to prepare for the next deployment action.

[0045] In this embodiment, second pins 360 are fixedly connected to both sides of the top of the elastic boss 320, one end of the second pin 360 is inserted into a second pin hole 370 provided at the bottom of the slot 321, and a second spring 380 is sleeved on the outside of the second pin 360.

[0046] Specifically, when the elastic boss 320 is unlocked and moves to the limiting groove 150, the elastic boss 320's own gravity and the elastic force of the second spring 380 can enable the elastic boss 320 to extend and the spherical protrusion 322 to fit more closely with the limiting groove 150, thereby ensuring the stable and reliable support of the support seat 300 for the long screw rod 130.

[0047] In this embodiment, bearing mounting grooves 390 are provided on both sides of the top of the support seat 300, and a rubber-coated bearing 400 with a shaft is installed inside the bearing mounting groove 390. The shaft of the rubber-coated bearing 400 is fixedly connected to the support seat 300 by screws, and the rubber-coated bearing 400 is in rolling contact with the inner side of the dust cover 160.

[0048] Specifically, during the operation of the module, when the support seat 300 moves with the movement of the sliding seat 200 and the long screw 130, the rubber-coated bearing 400 rolls in contact with the inner side of the dust cover 160. The rubber-coated bearing 400 can reduce the friction between the support seat 300 and the dust cover 160, so that the support seat 300 can move more smoothly and will not be affected by excessive friction. The speed and accuracy of its deployment and folding will not be affected. In addition, the rubber-coated material of the rubber-coated bearing 400 has a certain elasticity and cushioning property. During the movement of the support seat 300, it can cushion the impact caused by vibration or other external forces, thereby ensuring the stability of the support seat 300.

[0049] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An ultra-long stroke screw support structure, characterized in that: include: An outer cover shell (100), wherein a screw bearing frame (110) is installed at one end inside the outer cover shell (100), and a drive motor (120) is installed at the other end inside the outer cover shell (100); an output shaft of the drive motor (120) is connected to a long screw (130); one end of the long screw (130) is rotatably connected to the screw bearing frame (110) through a matching bearing; two linear guide rails (140) are also installed inside the outer cover shell (100); and a plurality of shuttle-shaped limiting grooves (150) are provided inside the shell bottom of the outer cover shell (100); A sliding seat (200), wherein the sliding seat (200) is rollingly sleeved with the long screw (130) via a first screw nut (210) installed inside, a plurality of first linear sliders (220) are fixedly connected to both sides of the bottom of the sliding seat (200), the first linear sliders (220) are slidably connected to the linear guide rail (140), and first hooks (230) are fixedly installed at both ends of the sliding seat (200); A plurality of support seats (300) for dispersing the weight of the long lead screw (130) and the friction force during movement and reducing the sagging and shaking of the long lead screw (130), wherein the plurality of support seats (300) are divided into two groups, the two groups of support seats (300) are respectively located on both sides of the sliding seat (200) and are rollingly sleeved with the long lead screw (130) through a second lead screw nut (310), an elastic boss (320) is installed at the middle bottom end of each support seat (300), a boss unlocking mechanism (500) composed of a first pin (510) and a first spring (520) is installed on one side of the support seat (300) away from the end of the outer cover shell (100), and a second draw hook (330) is also installed on one side of the support seat (300), and a draw hook hole (340) is opened on the other side of the support seat (300) and on both sides of the elastic boss (320); When the sliding seat (200) reciprocates on the long screw rod (130), a group of support seats (300) in the opposite direction of movement thereof are unfolded one by one, the boss unlocking mechanism (500) unlocks the elastic boss (320), and the elastic boss (320) of each support seat (300) moves into the corresponding limiting groove (150) and stays there, the second hook (330) of the adjacent support seat (300) is disengaged from its hook hole (340), and a group of support seats (300) in the same direction of movement thereof are retracted one by one, the boss unlocking mechanism (500) locks the elastic boss (320), and the elastic boss (320) of each support seat (300) is retracted from the limiting groove (150), and the first hook (230) and the second hook (330) are both inserted into the corresponding hook hole (340).

2. The ultra-long stroke screw support structure according to claim 1, characterized in that: The number of the support seats (300) is an even number of pairs, and the number of the support seats (300) is at least two, and the length of the long threaded rod (130) is greater than 1.5 m.

3. The ultra-long stroke screw support structure according to claim 1, characterized in that: A dust cover (160) is installed on the top of the outer cover shell (100), and both side ends of the sliding seat (200) are placed outside the dust cover (160).

4. The ultra-long stroke screw support structure according to claim 1, characterized in that The bottoms of both ends of the support seat (300) are fixedly connected to second linear slide blocks (350), and the second linear slide blocks (350) are slidably connected to the linear guide rails (140).

5. The ultra-long stroke screw support structure according to claim 1, characterized in that: The elastic boss (320) is installed in a slot (321) provided at the bottom end of the middle portion of the support seat (300), and a spherical protrusion (322) capable of sliding or limiting in the limiting groove (150) is fixedly connected to the bottom end of the elastic boss (320), and the spherical protrusion (322) is made of nylon.

6. The ultra-long stroke screw support structure according to claim 1, characterized in that: The boss unlocking mechanism (500) further comprises a first pin hole (530) which is opened in the middle of the elastic boss (320) and on both sides of the support seat (300) and is used to accommodate the first pin (510) and the first spring (520); a collar (540) is embedded in the interior of the first pin hole (530); the first pin (510) is a cross-shaped pin; one end of the first pin (510) passes through the collar (540) and is placed outside the support seat (300); the first spring (520) is sleeved on the other end of the first pin (510) and is placed inside the first pin hole (530).

7. The ultra-long stroke screw support structure according to claim 1, characterized in that: Second pins (360) are fixedly connected to both sides of the top of the elastic boss (320), one end of the second pin (360) is inserted into a second pin hole (370) provided at the bottom of the slot (321), and a second spring (380) is sleeved on the outside of the second pin (360).

8. The ultra-long stroke screw support structure according to claim 1, characterized in that: Both sides of the top of the support seat (300) are provided with bearing installation grooves (390), and a rubber-coated bearing (400) with a shaft is installed inside the bearing installation groove (390). The shaft of the rubber-coated bearing (400) is fixedly connected to the support seat (300) by screws, and the rubber-coated bearing (400) is in rolling contact with the inner side of the dust cover (160).

Images