Large stroke ball screw work platform

Abstract

The application relates to the technical field of linear sliding devices, in particular to a large-stroke screw rod operation platform which comprises a base and a screw rod, the screw rod being rotationally arranged on the base; a screw nut being sleeved on the screw rod and being in threaded cooperation with the screw rod, the screw nut moving along the axial direction of the screw rod; a supporting assembly being used for supporting the screw rod, the supporting assembly comprising a first supporting seat and a second supporting seat, the first supporting seat being connected with the second supporting seat through a sliding table, the second supporting seat and the first supporting seat being connected with the screw rod through supporting nuts, the supporting nuts being in threaded cooperation with the screw rod, the first supporting seat and the second supporting seat being respectively located at two ends of the screw nut along the axial direction of the screw rod; wherein the supporting nuts are intermittently connected with the supporting seats through electromagnets. The application realizes the support addition of the long-stroke screw rod shaft by increasing the supporting nuts on the supporting seats and realizing the intermittent connection of the supporting nuts with the supporting seats, the installation interval is shortened, and meanwhile, the maximum long-stroke length of the original screw nut is ensured.

Description

Technical Field

[0001] This application relates to the field of linear sliding device technology, and more particularly to a large-stroke lead screw working platform. Background Technology

[0002] Ball screws are supported by bearing housings at both ends during operation. However, during long strokes, due to excessive spacing between the bearing housings and the weight of the screw shaft itself, a "screw head" region can form in the middle of the shaft. This causes the screw shaft to rotate eccentrically, affecting overall rotational accuracy. Furthermore, as the spacing increases, the overall support rigidity of the screw shaft weakens, and its natural vibration frequency decreases. As the ball screw speed increases, it quickly approaches the natural frequency, causing resonance and preventing further rotation. This prevents the screw shaft from reaching higher speeds.

[0003] To mitigate the problem of eccentric rotation of the lead screw shaft, a support device is typically added in the middle of the shaft, shortening the installation distance. This serves two purposes: firstly, it increases the rigidity of the support to prevent deflection, and secondly, it allows for a higher rotational speed of the lead screw shaft. The support device itself is not powered. To avoid interfering with the slippage of the lead screw nut, the support device must be connected to the lead screw nut to move and stop together with it. Figure 1 As shown, however, in such a structure, the travel L0 of the nut is limited by the support device. Utility Model Content

[0004] The technical problem to be solved by this utility model is that in the existing large-stroke lead screw structure, the stroke of the lead screw nut is limited by the support device, and the problems of lead screw eccentricity and lead screw nut stroke shortening cannot be solved simultaneously.

[0005] Therefore, this utility model provides a long-stroke lead screw working platform, which realizes the support of long-stroke lead screw shafts, shortens the installation distance, and at the same time ensures the maximum long stroke length of the original lead screw nut.

[0006] The technical solution adopted by this utility model to solve its technical problem is: A long-stroke lead screw working platform includes, Base, and The lead screw is rotatably mounted on the base; A lead screw nut is sleeved on the lead screw and threaded into the lead screw, and the lead screw nut moves along the axial direction of the lead screw. A support assembly for supporting the lead screw, the support assembly comprising, First support base, and The second support seat is connected to the first support seat via a slide table. Both the second support seat and the first support seat are connected to the lead screw via support nuts. The support nuts are threaded into the lead screw. The first support seat and the second support seat are located at both ends of the lead screw nut along the axial direction of the lead screw. The support nut and the support base are intermittently connected.

[0007] Furthermore, electromagnets are provided on the contact surfaces between the support nut and the first and second support seats, and the switching on and off of the electromagnets enables the support nut to be detachably connected to the first and second support seats.

[0008] Furthermore, the electromagnet is embedded in the first support base and the second support base.

[0009] Furthermore, the end of the support nut is provided with a flange, the surface of the flange that abuts against the first support seat and the second support seat is the first abutment surface, the surface of the first support seat and the second support seat that abuts against the flange is the second abutment surface, and an electromagnet is provided on both the first abutment surface and the second abutment surface.

[0010] Furthermore, both the first support base and the second support base are provided with through holes, and a support block is installed in the through hole. The lead screw passes through the support block and the support nut. The support nut is threadedly engaged with the lead screw. The flange is located at the head of the support nut, and the tail of the support nut can be inserted into the through hole.

[0011] Furthermore, the support assembly also includes a guide rail, which is mounted on the base and its length direction is along the axial direction of the lead screw. The slide table is slidably engaged with the guide rail.

[0012] Furthermore, it also includes a controller, which is electrically connected to the electromagnet and controls the on / off state of the electromagnet.

[0013] Furthermore, the lead screw is connected to the base via mounting blocks, and two mounting blocks are respectively located at both ends of the lead screw. The base is equipped with a motor that drives the lead screw to rotate.

[0014] Furthermore, shock absorbers are provided on the side of both mounting blocks closest to the support assembly.

[0015] The beneficial effects of this utility model are as follows: In this application, the support seat uses a support nut connected to the lead screw, which can automatically achieve stroke feed as the lead screw shaft rotates. During the movement of the lead nut along the lead screw, the feeding mode is controlled by setting the time of the electromagnet, allowing the lead nut to move forward between the two support seats. This avoids the situation in existing technologies where the intermediate support reaches the end of its stroke, preventing the lead nut from achieving its maximum stroke. Furthermore, by using a standard clearance lead nut, rolling friction between it and the lead screw shaft results in low resistance and low heat generation, reducing wear and extending service life. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the lead screw sliding mechanism in the background art.

[0018] Figure 2 This is a structural schematic diagram of the large stroke lead screw working platform of this utility model.

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

[0020] Figure 4 This is a schematic diagram of the installation structure of the electromagnet on the end face of the support base in this utility model.

[0021] In the diagram: 1. Base; 2. Mounting block; 3. Lead screw; 4. Lead nut; 5. Guide rail; 6. Slide table; 7. First support seat; 8. Second support seat; 9. Support block; 10. Support nut; 11. Electromagnet; 12. Shock absorber. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] A large-stroke lead screw working platform includes a base 1, a lead screw 3, a lead screw nut 4, and a support assembly. The lead screw 3 is connected to the base 1 via mounting blocks 2. There are two mounting blocks 2 located at the two ends of the lead screw 3. A motor for driving the lead screw 3 to rotate is provided on the base 1. The lead screw nut 4 is coaxially sleeved on the lead screw 3 and threadedly engaged with the lead screw 3. The support assembly is used to support the lead screw 3.

[0026] The support assembly includes a guide rail 5, a slide table 6, a first support seat 7, and a second support seat 8. The guide rail 5 is mounted on the base 1 and its length direction is axially arranged along the lead screw 3. The slide table 6 is slidably mounted on the base 1 via the guide rail 5. The first support seat 7 and the second support seat 8 are respectively located at both ends of the slide table 6. Both the first support seat 7 and the second support seat 8 are provided with through holes. A support block 9 and a support nut 10 are installed in the through holes. The lead screw 3 passes through the support block 9 and the support nut 10. The support nut 10 is threadedly engaged with the lead screw 3, causing the first support seat 7 and the second support seat 8 to slide axially along the lead screw 3. The lead screw nut 4 is located between the first support seat 7 and the second support seat 8.

[0027] The support nut 10 is a standard clearance screw nut. One end of the support nut 10 can be inserted into a through hole, and this end is the tail of the support nut 10. The other end is the head of the support nut 10. The head of the support nut 10 is provided with a flange. When the tail of the support nut 10 is inserted into the through hole of a support seat, the flange abuts against the end face of the support seat. The surface of the flange abutting against the support seat is the first abutting surface, and the surface of the support seat abutting against the flange is the second abutting surface. Electromagnets 11 are provided on both the first abutting surface and the second abutting surface. In this embodiment, multiple electromagnets 11 are provided on both the first abutting surface and the second abutting surface. Multiple electromagnets 11 are circumferentially arranged around the lead screw 3.

[0028] This application can also include a controller, which is electrically connected to the electromagnet 11. When energized, the electromagnet 11 attracts and fixes the support nut 10 and the support seat. At this time, as the lead screw 3 rotates, it drives the lead nut 4 to move forward, while simultaneously moving the support seat. When de-energized, the electromagnet 11 loses its attraction, the support nut 10 and the support seat lose their connection, the support nut 10 rotates in place with the lead screw 3, the support seat remains stationary without any feeding action, while the lead nut 4 continues to move forward.

[0029] The energizing time (t) of electromagnet 11 is set according to the rotational speed (n) of lead screw 3, satisfying the following formula relationship: t = 30 / n seconds. After being energized for t time, the energizer is de-energized for t time, and this cycle is repeated.

[0030] In this embodiment, during the process T of the lead screw 3 rotating and the lead nut 4 moving along the axial direction of the lead screw 3, the electromagnet 11 is energized for a total duration of T / 2, thereby causing the lead screw 3 to rotate N times. The support nut 10, the first support seat 7, and the second support seat 8 are driven forward for N / 2 turns and remain stationary for N / 2 turns. Thus, during the process T of the lead nut 4 moving along the axial direction of the lead screw 3, the stroke length of the lead nut 4 is L, and the stroke length of the support seat is L / 2. Since the support nut 10 and the support seat are intermittently connected, the support assembly moves and stops intermittently. Therefore, the forward speed of the lead nut 4 is always greater than or equal to the moving speed of the support seat. The lead nut 4 can move forward between the two support seats without interference or obstruction from the support seats.

[0031] Furthermore, to prevent damage caused by collision between the support base and the mounting block 2 when the support base moves, shock absorbers 12 are provided on the side of both mounting blocks 2 closest to the support base.

[0032] In this application, the support base is connected to the lead screw 3 via a support nut 10, thus enabling automatic stroke feeding as the lead screw 3 rotates. During the movement of the lead nut 4 along the lead screw, the feeding mode is controlled by setting the time of the electromagnet 11 to move halfway and stop halfway. This allows the lead nut 4 to move forward between the two support bases, avoiding the situation in existing technologies where the intermediate support reaches the end of its stroke, preventing the lead nut 4 from achieving its maximum stroke. Simultaneously, by using a standard clearance lead nut, rolling friction between it and the lead screw shaft reduces resistance and heat generation, minimizing wear and extending service life.

[0033] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A large-stroke lead screw working platform, characterized in that, include, Base (1), and A lead screw (3) is rotatably mounted on a base (1); Thread nut (4), which is sleeved on the lead screw (3) and threadedly engaged with the lead screw (3), and the thread nut (4) moves along the axial direction of the lead screw (3); A support assembly for supporting the lead screw (3), the support assembly comprising, First support (7), and The second support seat (8) is connected to the first support seat (7) via a slide (6). Both the second support seat (8) and the first support seat (7) are connected to the lead screw (3) via a support nut (10). The support nut (10) is threaded into the lead screw (3). The first support seat (7) and the second support seat (8) are located at both ends of the lead screw nut (4) along the axial direction of the lead screw (3). The support nut (10) is intermittently connected to the support base.

2. The large-stroke lead screw working platform according to claim 1, characterized in that, Electromagnets (11) are provided on the contact surfaces between the support nut (10) and the first support base (7) and the second support base (8). The switching on and off of the electromagnets (11) enables the support nut (10) to be detachably connected to the first support base (7) and the second support base (8).

3. The large-stroke lead screw operating platform according to claim 2, characterized in that, The electromagnet (11) is embedded in the first support base (7) and the second support base (8).

4. The large-stroke lead screw working platform according to claim 2, characterized in that, The end of the support nut (10) is provided with a flange. The surface of the flange that abuts against the first support seat (7) and the second support seat (8) is the first abutting surface. The surface of the first support seat (7) and the second support seat (8) that abuts against the flange is the second abutting surface. An electromagnet (11) is provided on both the first abutting surface and the second abutting surface.

5. The large-stroke lead screw working platform according to claim 4, characterized in that, Both the first support base (7) and the second support base (8) are provided with through holes. A support block (9) is installed in the through hole. The lead screw (3) passes through the support block (9) and the support nut (10). The support nut (10) is threadedly engaged with the lead screw (3). The flange is provided at the head of the support nut (10). The tail of the support nut (10) can be inserted into the through hole.

6. The large-stroke lead screw working platform according to claim 1, characterized in that, The support assembly also includes a guide rail (5), which is mounted on the base (1). The length of the guide rail (5) is axially arranged along the lead screw (3), and the slide (6) is slidably engaged with the guide rail (5).

7. The large-stroke lead screw operating platform according to claim 1, characterized in that, The lead screw (3) is connected to the base (1) via mounting blocks (2). The mounting blocks (2) have two blocks located at the two ends of the lead screw (3). The base (1) is equipped with a motor that drives the lead screw (3) to rotate.

8. The large-stroke lead screw operating platform according to claim 7, characterized in that, Both mounting blocks (2) are provided with shock absorbers (12) on the side near the support assembly.

9. The large-stroke lead screw working platform according to claim 2, characterized in that, It also includes a controller, which is electrically connected to the electromagnet (11) and controls the on and off of the electromagnet (11).

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