Ultra-long stroke lead screw supporting structure

Abstract

The utility model 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. 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, prolongs the service life of a module and improves the production efficiency. 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] This utility model relates to the field of lead screw module technology, specifically to an ultra-long stroke lead screw support structure. Background Technology

[0002] In various linear module applications requiring high precision and long stroke, such as precision machinery, semiconductor equipment, and automation equipment, the lead screw, as a key transmission component, plays a decisive role in the operation of the entire module. However, when the lead screw stroke is long, its own weight and the friction generated during long strokes can cause a series of problems. Among these, the lead screw is prone to sagging, making it difficult to guarantee its straightness during operation, resulting in a decrease in the module's positioning accuracy. Simultaneously, wobbling also occurs, not only affecting the smooth operation of the lead screw but also further accelerating wear between the lead screw and other components, significantly shortening the module's lifespan. Utility Model Content

[0003] The purpose of this invention is to provide an ultra-long stroke lead screw support structure to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an ultra-long stroke lead screw support structure, comprising an outer casing, a sliding seat, and multiple support seats for dispersing the weight of the long lead screw and the frictional force during movement, and reducing the sagging and swaying of the long lead screw. A lead screw bearing bracket is installed at one end inside the outer casing, and a drive motor is installed at the other end inside the outer casing. The output shaft of the drive motor is connected to the long lead screw, and one end of the long lead screw is rotatably connected to the lead screw bearing bracket with a bearing. Two linear guide rails are also installed inside the outer casing, and multiple shuttle-shaped limiting grooves are formed inside the bottom of the outer casing.

[0005] The sliding seat is connected to a long lead screw via an internally installed first lead screw nut. Multiple first linear sliders are fixedly connected to both sides of the bottom of the sliding seat, and these first linear sliders are slidably connected to a linear guide rail. First hooks are fixedly installed at both ends of the sliding seat. The multiple support seats are divided into two groups, located on opposite sides of the sliding seat and connected to the long lead screw via a second lead screw nut. Each support seat has an elastic boss at its bottom center. On the side of the support seat furthest from the outer casing, a boss unlocking mechanism consisting of a first pin and a first spring is installed. Simultaneously, 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 long screw slides back and forth, a group of support seats in the opposite direction of its movement unfolds one by one. The boss unlocking mechanism unlocks the elastic boss, and the elastic boss of each support seat moves into the corresponding limiting groove and stops. The second hook of the adjacent support seat disengages from its hook hole, and a group of support seats in the same direction of movement retracts one by one. The boss unlocking mechanism locks the elastic boss, and the elastic boss of each support seat retracts from the limiting groove. The first hook and the second hook are both inserted into the corresponding hook hole.

[0006] As a preferred embodiment of this utility model: the number of the support bases is an even number of pairs, and the minimum number of support bases is two, and the length of the long screw is greater than 1.5m.

[0007] As a preferred embodiment of this utility model: a dust cover is installed on the top of the outer casing, and the two ends of the sliding seat are placed outside the dust cover.

[0008] As a preferred embodiment of this utility model: a second linear slider is fixedly connected to the bottom of both ends of the support base, and the second linear slider is slidably connected to the linear guide rail.

[0009] As a preferred embodiment of this utility model: the elastic boss is installed in the slot opened at the bottom of the middle part of the support base, and the bottom end of the elastic boss is fixedly connected to a spherical protrusion that can slide or be limited in the limiting groove. The spherical protrusion is made of nylon material.

[0010] As a preferred embodiment of the present invention: the boss unlocking mechanism further includes a first pin hole opened in the middle of the elastic boss and on both sides of the support seat for accommodating the first pin and the first spring. A collar is embedded inside the first pin hole. The first pin is a cross-shaped pin. One end of the first pin passes through the collar and is placed outside the support seat. The first spring is sleeved on the other end of the first pin and placed inside the first pin hole.

[0011] As a preferred embodiment of the present invention: a second pin is fixedly connected to both sides of the top of the elastic boss, one end of the second pin is inserted into the 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 embodiment of this utility model: bearing mounting grooves are provided on both sides of the top of the support base, 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 base by screws, and the rubber-coated bearing is in rolling contact with the inside of the dust cover.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1) The ultra-long stroke lead screw support structure of this utility model has multiple support seats distributed in groups on both sides of the sliding seat. The support seats are rolled and sleeved with the long lead screw through the second lead screw nut, which effectively disperses the weight of the long lead screw and the friction of movement, greatly reduces the probability of lead screw sagging and swaying, and significantly improves the accuracy and stability of the module. The elastic boss at the bottom of the middle of the support seat cooperates with the shuttle-shaped limiting groove at the bottom of the outer shell. The boss unlocking mechanism and the hook and hook hole cooperate to enable the support seats to unfold and retract in an orderly manner during the reciprocating motion of the sliding seat, so as to provide stable support for the lead screw in a precise and efficient manner.

[0015] 2) The second linear slider at the bottom of both ends of the support base of this utility model slides in cooperation with the linear guide rail, which further improves the stability of the support base when it moves and ensures the stability of the support during the entire operation of the lead screw. The rubber-coated bearing with shaft installed on the top of the support base rolls in contact with the inside of the dust cover. While ensuring that the support base can move smoothly, the dust cover and the outer cover can also provide a better dust protection effect for the module, protect the internal long lead screw and lead screw nut and other components, and improve the service life of the module.

[0016] 3) The ultra-long stroke lead screw support structure of this utility model not only effectively solves the problems of drooping and swaying of long stroke lead screws and extends the service life of the module, but also allows for flexible addition of the number of support seats according to the length of the lead screw, so that the support structure can be adapted to the lead screw length and stroke requirements of different modules. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the outer casing of this utility model;

[0019] Figure 3 This is a schematic diagram of the unfolded support base of this utility model;

[0020] Figure 4This is a schematic diagram of the sliding seat structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the support structure of this utility model;

[0022] Figure 6 This is one of the schematic diagrams of the support structure of this utility model;

[0023] Figure 7 This is a schematic diagram of the elastic boss structure of this utility model;

[0024] Figure 8 This is a schematic diagram of the slotted structure of this utility model;

[0025] Figure 9 This is a schematic diagram of the boss unlocking mechanism of this utility model.

[0026] In the diagram: 100, outer casing; 110, lead screw bearing bracket; 120, drive motor; 130, long lead screw; 140, linear guide rail; 150, limiting groove; 160, dust cover; 200, sliding seat; 210, first lead screw nut; 220, first linear slider; 230, first hook; 300, support seat; 310, second lead 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 Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example

[0029] Please see Figure 1-9This utility model provides a technical solution: an ultra-long stroke lead screw support structure, including an outer shell 100, a sliding seat 200, and multiple support seats 300 for dispersing the weight of the long lead screw 130 and the friction during movement, and reducing the sagging and swaying of the long lead screw 130. Among them, a lead screw bearing frame 110 is installed at one end of the inner shell 100, and a drive motor 120 is installed at the other end of the inner shell 100. The output shaft of the drive motor 120 is connected to the long lead screw 130. One end of the long lead screw 130 is rotatably connected to the lead screw bearing frame 110 with a bearing. Two linear guide rails 140 are also installed inside the outer shell 100. Multiple shuttle-shaped limiting grooves 150 are opened inside the bottom of the outer shell 100.

[0030] The sliding seat 200 is rolledly connected to the long screw 130 through the first screw nut 210 installed inside. Multiple 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] Multiple support seats 300 are divided into two groups. The two groups of support seats 300 are located on both sides of the sliding seat 200 and are rolledly connected to the long screw 130 through the second screw nut 310. Each support seat 300 has an elastic boss 320 installed at the bottom middle part. The support seat 300 at the end away from the outer cover 100 is equipped with a boss unlocking mechanism 500 consisting 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. Hook holes 340 are opened on the other side of the support seat 300 and both sides of the elastic boss 320.

[0032] When the sliding seat 200 reciprocates with the long screw 130, a group of support seats 300 in the opposite direction of its movement unfold 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 stops. The second hook 330 of the adjacent support seat 300 disengages from its hook hole 340. A group of support seats 300 in the same direction of movement retracts one by one. The boss unlocking mechanism 500 locks the elastic boss 320. The elastic boss 320 of each support seat 300 retracts 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 starts, 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 slide seat 200 performs reciprocating linear motion along the linear guide rail 140. By utilizing the sliding cooperation between the first linear slider 220 and the linear guide rail 140, the smoothness of the movement of the slide seat 200 can be effectively guaranteed.

[0034] When the sliding seat 200 reciprocates on the long lead screw 130, the long lead screw 130, in conjunction with the second lead screw nut 310, also drives the two sets of support seats 300 to move. The set of support seats 300 moving in the opposite direction to the sliding seat 200 begins to function, and this set 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 disengages from the first pin hole 530 under the action of the first spring 520, thereby unlocking the elastic boss 320 and allowing the elastic boss 320 to extend downward. When the support seat 300 moves to the corresponding limiting groove 150 position, the spherical protrusion 322 of the elastic boss 320 falls into the limiting groove 150, and the support seat 300... The device pauses here, while the second hook 330 of the adjacent support seat 300 disengages from its hook hole 340, continues to move, and causes the spherical protrusion 322 to fall into the next limiting groove 150, thereby supporting the long lead screw 130, dispersing its own weight and motion friction, and reducing the swaying of the long lead screw 130; while a group of support seats 300 moving in the same direction as the sliding seat 200 retract one by one. When the adjacent support seats 300 are pressed together, 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 retracts from the limiting groove 150. The first hook 230 and the second hook 330 are inserted into the corresponding hook holes 340, ready for the next unfolding action.

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

[0036] Specifically, even-numbered pairs of support seats 300 are distributed on both sides of the sliding seat 200, which can more evenly distribute the weight of the long lead screw 130 and the frictional force generated by its movement. At the same time, multiple support seats 300 can provide support at different positions of the lead screw when unfolded, and multiple stable fulcrums are built under the long lead screw 130, so that the force on the lead screw is more even 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 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 casing 100, and the two ends of the sliding seat 200 are placed outside the dust cover 160.

[0038] Specifically, when the sliding seat 200 reciprocates linearly on the long lead screw 130, the dust cover 160 and the outer casing 100 together form a relatively enclosed space, making it difficult for external dust and impurities to enter the module. This prevents dust particles from adhering to key components such as the long lead screw 130, the lead screw nut, and the linear guide rail 140, ensuring the long-term stable operation of the module and extending its service life.

[0039] In this embodiment, a second linear slider 350 is fixedly connected to the bottom of both ends of the support base 300, and the second linear slider 350 is slidably connected to the linear guide rail 140.

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

[0041] In this embodiment, the elastic boss 320 is installed in the slot 321 opened at the bottom of the middle part of the support base 300. The bottom end of the elastic boss 320 is fixedly connected to a spherical protrusion 322 that can slide or be limited in the limiting groove 150. The spherical protrusion 322 is made of nylon material.

[0042] Specifically, the spherical protrusions 322 made of nylon material give it good wear resistance and a certain degree of support elasticity. When the support seat 300 moves to the corresponding limiting groove 150 position as the long screw 130 moves, when the spherical protrusions 322 come into contact with the shuttle-shaped limiting groove 150, they can adapt to the shape change of the limiting groove 150 by utilizing their elasticity to achieve a tight fit, thereby accurately limiting the position of the support seat 300, thus ensuring that the long screw 130 is stably supported at this position.

[0043] In this embodiment, the boss unlocking mechanism 500 further includes a first pin hole 530 formed in the middle of the elastic boss 320 and on both sides of the support base 300 for accommodating the first pin 510 and the first spring 520. A collar 540 is embedded inside 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 base 300. The first spring 520 is sleeved on the other end of the first pin 510 and placed inside the first pin hole 530.

[0044] Specifically, when the support seats 300 come together, the adjacent support seats 300 will abut against the first pin 510 and compress the first spring 520, while the first pin 510 is inserted into the first pin hole 530, locking the elastic boss 320 again and causing it to retract, ready for the next unfolding action.

[0045] In this embodiment, the top two sides of the elastic boss 320 are fixedly connected with second pins 360. One end of the second pin 360 is inserted into the 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 weight and the elastic force of the second spring 380 enable the spherical protrusion 322 to fit more tightly with the limiting groove 150 after the elastic boss 320 extends, ensuring the support seat 300's support for the long screw 130 is stable and reliable.

[0047] In this embodiment, bearing mounting grooves 390 are provided on both sides of the top of the support base 300. 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 base 300 by screws. The rubber-coated bearing 400 is in rolling contact with the inside of the dust cover 160.

[0048] Specifically, during module operation, as the support base 300 moves along with the sliding seat 200 and the long lead screw 130, the rubber-coated bearing 400 rolls against the inner side of the dust cover 160. The rubber-coated bearing 400 reduces the friction between the support base 300 and the dust cover 160, making the support base 300 move more smoothly and preventing excessive friction from affecting its unfolding and retraction speed and accuracy. Furthermore, the rubber coating material of the bearing 400 has a certain degree of elasticity and cushioning, which can buffer the impact caused by vibration or other external forces during the movement of the support base 300, ensuring the stability of the support base 300.

[0049] The contents not described in detail in this description are existing technologies known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A support structure for an ultra-long stroke lead screw, characterized in that, include: An outer casing (100) has a lead screw bearing bracket (110) installed at one end inside the outer casing (100) and a drive motor (120) installed at the other end inside the outer casing (100). The output shaft of the drive motor (120) is connected to a long lead screw (130). One end of the long lead screw (130) is rotatably connected to the lead screw bearing bracket (110) with a bearing. Two linear guide rails (140) are also installed inside the outer casing (100). Multiple shuttle-shaped limiting grooves (150) are opened inside the bottom of the outer casing (100). A sliding seat (200) is rolledly connected to a long lead screw (130) via an internally installed first lead screw nut (210). Multiple 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 a linear guide rail (140). First hooks (230) are fixedly installed at both ends of the sliding seat (200). Multiple support seats (300) are provided to distribute the weight of the long lead screw (130) and the friction during movement, and to reduce the sagging and swaying of the long lead screw (130). The multiple support seats (300) are divided into two groups. The two groups of support seats (300) are located on both sides of the sliding seat (200) and are rolledly connected to the long lead screw (130) through the provided second lead screw nut (310). Each support seat (300) has an elastic boss (320) installed at the bottom of the middle part. On the side of the support seat (300) away from the end of the outer cover (100), a boss unlocking mechanism (500) consisting of a first pin (510) and a first spring (520) is installed. At the same time, a second hook (330) is also installed on one side of the support seat (300). Hook holes (340) are provided on the other side of the support seat (300) and on both sides of the elastic boss (320). When the sliding seat (200) slides back and forth on the long screw (130), a group of support seats (300) with the opposite direction of movement unfold 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 stops. The second hook (330) of the adjacent support seat (300) disengages from its hook hole (340). A group of support seats (300) with the same direction of movement close one by one. The boss unlocking mechanism (500) locks the elastic boss (320). The elastic boss (320) of each support seat (300) retracts 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 lead screw support structure according to claim 1, characterized in that: 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 long screw (130) is greater than 1.5m.

3. The ultra-long stroke lead screw support structure according to claim 1, characterized in that: The top of the outer casing (100) is fitted with a dust cover (160), and the two ends of the sliding seat (200) are placed outside the dust cover (160).

4. The ultra-long stroke lead screw support structure according to claim 1, characterized in that... The bottom of both ends of the support base (300) is fixedly connected to a second linear slider (350), and the second linear slider (350) is slidably connected to the linear guide rail (140).

5. The ultra-long stroke lead screw support structure according to claim 1, characterized in that: The elastic boss (320) is installed in the slot (321) at the bottom of the middle part of the support base (300). The bottom end of the elastic boss (320) is fixedly connected to a spherical protrusion (322) that can slide or be limited in the limiting groove (150). The spherical protrusion (322) is made of nylon material.

6. The ultra-long stroke lead screw support structure according to claim 1, characterized in that: The boss unlocking mechanism (500) further includes a first pin hole (530) opened in the middle of the elastic boss (320) and on both sides of the support base (300) for accommodating the first pin (510) and the first spring (520). A collar (540) is embedded inside 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 base (300). The first spring (520) is sleeved on the other end of the first pin (510) and placed inside the first pin hole (530).

7. The ultra-long stroke lead screw support structure according to claim 1, characterized in that: The top two sides of the elastic boss (320) are fixedly connected with second pins (360). One end of the second pin (360) is inserted into the 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 lead screw support structure according to claim 1, characterized in that: The support base (300) has bearing mounting grooves (390) on both sides of its top. 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 base (300) by screws. The rubber-coated bearing (400) is in rolling contact with the inside of the dust cover (160).

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