A screw rod and four-axis motor linkage jacking machine

Abstract

The utility model provides a screw rod and four axle motor linkage jacking machine relates to mechanical equipment technical field, include: fixed plate, upper movable plate, lower movable plate and guiding device, the guiding device includes a plurality of guide posts and corresponding setting on the linear bearing of fixed plate, the both ends of guide post are connected upper movable plate with lower movable plate respectively, and are worn in linear bearing, lower movable plate is detachably connected with first bearing seat, the lower end of screw rod is fixed in lower movable plate through first bearing seat, the upper end of screw rod is supported in upper movable plate through a deep groove ball bearing in floating mode. The utility model has the advantages that, through setting up guiding device in the corner of fixed plate, forms a stable frame structure, can effectively resist the moment produced because of load eccentricity, ensures that the jacking process is stable, has no shaking, and the whole structure is more compact, also is convenient for application in the space limited automatic production line.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment technology, and in particular to a lead screw and four-axis motor linkage lifting machine. Background Technology

[0002] In fields such as industrial automation, intelligent manufacturing, and precision assembly, achieving precise and stable vertical lifting and positioning of workpieces or tooling plates is a key technological requirement. Currently, the widely used linear motion mechanism is the lead screw module. The working principle of the lead screw module is that the rotational motion of the servo motor drives the lead screw to rotate via a coupling, thereby causing the nut assembly connected to the load to move axially, ultimately converting the rotational motion into precise linear displacement. This structure is widely used in horizontal movement or long-stroke lifting scenarios due to its high positioning accuracy and good controllability.

[0003] The existing lead screw module lifting technology has the following problems: the lead screw module mainly adopts a connection method in which the motor and the lead screw are fixed and the nut is used to realize the up and down movement. However, this type of lead screw module is mostly used in horizontal linear motion scenarios and is not suitable for short stroke and narrow vertical space. In addition, this fixing method makes it difficult to flexibly replace lead screws of different diameters according to different load and accuracy requirements, which has certain limitations. Utility Model Content

[0004] This invention overcomes the shortcomings of the prior art and provides a lifting machine that links a lead screw with a four-axis motor, which has good stability and is easy to install and maintain.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] A lead screw and four-axis motor linkage lifting machine includes: a fixed plate, an upper movable plate, a lower movable plate, and a guide device. The guide device includes a plurality of guide columns and linear bearings correspondingly arranged on the fixed plate. The two ends of the guide columns are respectively connected to the upper movable plate and the lower movable plate, and pass through the linear bearings, so that the upper movable plate and the lower movable plate can be raised and lowered vertically relative to the fixed plate.

[0007] It also includes a lead screw and a lead screw nut. The lower movable plate is detachably connected to a first bearing seat. The lower end of the lead screw is fixed to the lower movable plate through the first bearing seat. The upper end of the lead screw is supported on the upper movable plate in a floating manner through a deep groove ball bearing. The deep groove ball bearing is installed in a bearing flange, and the bearing flange is fixed to the upper movable plate.

[0008] The lead screw nut is fixedly installed on the fixing plate and is used in conjunction with the lead screw;

[0009] It also includes a servo motor, which is fixed to the lower movable plate, and the output shaft of the servo motor is connected to the lower end of the lead screw via a coupling;

[0010] The fixed plate is fixed, and when the servo motor drives the lead screw to rotate, the rotational motion of the lead screw is converted into the axial movement of the lead screw itself, thereby driving the upper movable plate, the lower movable plate and the servo motor to perform synchronous lifting or lowering motion.

[0011] Furthermore, the number of the guiding devices is four sets, and the guide posts and linear bearings are distributed at the adjacent corners of the fixed plate to form a four-axis guiding mechanism to resist the off-center load torque.

[0012] Furthermore, it also includes a motor mounting plate and several motor support columns, one end of which is connected to the lower movable plate and the other end of which is connected to the motor mounting plate, and the servo motor is fixedly mounted on the motor mounting plate.

[0013] Furthermore, it also includes a buffer limiting mechanism, which includes a first buffer block and a second buffer block sleeved on the guide post. The first buffer block is disposed on the side of the linear bearing near the upper movable plate, and the second buffer block is disposed on the lower movable plate, so as to form a mechanical hard limit for the up and down movement.

[0014] Furthermore, it also includes a connecting rod, the two ends of which are respectively connected to the upper movable plate and the lower movable plate; a sensing plate is provided on the fixed plate, and a first sensor and a second sensor with adjustable position are provided on the connecting rod. The sensing plate moves with the movable plate and can be detected by the first sensor and the second sensor to form a soft limit protection for up and down movement.

[0015] Furthermore, a longitudinally extending guide groove is formed on the connecting rod, and the first sensor and the second sensor are mounted by a sliding member slidably connected in the guide groove, the sliding member being provided with screw holes for locking.

[0016] Furthermore, the top end of the lead screw is provided with a retaining groove, in which a retaining spring is installed to prevent the top end of the lead screw from axially disengaging from the deep groove ball bearing.

[0017] Furthermore, the upper movable plate, the lower movable plate, and the guide post are detachably connected.

[0018] Furthermore, the lead screw nut is detachably fixed to the fixing plate by bolts.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This invention features a stable frame structure formed by guiding devices at the corners of the fixed plate. This effectively resists the torque generated by load eccentricity, ensuring a smooth and wobbly lifting process. Furthermore, the servo motor is mounted on the lower movable plate, moving with it, which reduces the space occupied by the lifting machine, making the overall structure more compact and suitable for use in space-constrained automated production lines. In addition, the upper end of the lead screw uses a deep groove ball bearing floating support, ensuring the centering of the lead screw transmission, compensating for minor errors that may occur during installation and operation, and, combined with the detachable connection of the first bearing seat, facilitating the flexible replacement of lead screws of different diameters according to actual load and accuracy requirements, which is very convenient. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the present invention and, together with the embodiments of the present invention, are used to explain the present invention. They do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 yes Figure 1 A magnified view of circle A in the middle;

[0024] Figure 3 This is a front view of the present invention;

[0025] Figure 4 This is a cross-sectional view of a deep groove ball bearing and its flange connected to the upper movable plate.

[0026] Figure 5 This is a schematic diagram of the connection between the lead screw and the deep groove ball bearing;

[0027] Figure 6 This is a schematic diagram showing the separation of the lead screw and the deep groove ball bearing.

[0028] In the picture:

[0029] 1. Fixed plate; 2. Upper movable plate; 3. Lower movable plate; 4. Guide column; 5. Linear bearing; 6. Lead screw; 601. Slot; 7. Lead screw nut; 8. First bearing seat; 9. Deep groove ball bearing; 10. Bearing flange; 11. Servo motor; 12. Coupling; 13. Motor fixing plate; 14. Motor support column; 15. First buffer block; 16. Second buffer block; 17. Connecting rod; 1701. Guide groove; 18. Sensing plate; 19. First sensor; 20. Second sensor; 21. Sliding joint; 2101. Screw hole; 22. Snap ring. Detailed Implementation

[0030] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0031] like Figures 1 to 6 As shown, this utility model claims protection for a lead screw and four-axis motor linkage lifting machine, including a fixed plate 1, an upper movable plate 2, a lower movable plate 3, a guide device, a lead screw transmission mechanism, and a servo motor 11. Specifically, the fixed plate 1 serves as the base of the entire device and is fixedly installed on the equipment frame during operation. Four linear bearings 5 ​​are fixedly installed on the fixed plate 1 near its four corners.

[0032] The guiding device includes four guide pillars 4 and four linear bearings 5. The two ends of the four guide pillars 4 are detachably connected to the upper movable plate 2 and the lower movable plate 3 by bolts, and each guide pillar 4 passes through a corresponding linear bearing 5. This design forms a robust four-axis guiding mechanism, which helps resist eccentric torque caused by uneven loads, ensuring smooth lifting. Furthermore, the detachable connection between the guide pillars 4 and the upper and lower movable plates 2 and 3 allows for the replacement of upper and lower movable plates 2 and 3 of different sizes according to available space, providing high flexibility.

[0033] The lead screw drive mechanism includes a lead screw 6 and a lead screw nut 7. In this embodiment, the lead screw nut 7 is detachably fixed to the center position of the fixed plate 1 by bolts. A first bearing seat 8 is detachably mounted on the lower movable plate 3 by bolts. The lower end of the lead screw 6 is supported and fixed to the lower movable plate 3 by the first bearing seat 8. The upper end of the lead screw 6 is supported in a floating manner on the upper movable plate 2 by a deep groove ball bearing 9.

[0034] Specifically, the deep groove ball bearing 9 is mounted in a bearing flange 10, which is then bolted to the upper movable plate 2. To ensure safety and prevent the lead screw 6 from axially disengaging from the deep groove ball bearing 9, a retaining groove 601 is provided at the top of the lead screw 6, and a retaining spring 22 is installed therein.

[0035] The aforementioned floating method refers to a support method that allows the lead screw 6 to have a certain degree of self-adjustment capability in both the axial and radial directions. The bearing flange 10, which is a separate machined part fixed to the upper movable plate 2 by bolts, is used to support the deep groove ball bearing 9, which is installed in the inner hole of the bearing flange 10. The top end of the lead screw 4 is directly inserted into and supported in the inner ring of the deep groove ball bearing 9. Since the deep groove ball bearing 9 mainly bears radial loads and has a relatively weak ability to restrict axial displacement, in this installation method, the inner ring of the deep groove ball bearing 9 can have a small degree of freedom of movement in the axial direction together with the lead screw 4, while also compensating for small angular deviations.

[0036] The servo motor 11 serves as the power source and is mounted on the lower movable plate 3 via a motor mounting plate 13 and several motor support columns 14. One end of each motor support column 14 is connected to the lower movable plate 3, and the other end is connected to the motor mounting plate 13. The servo motor 11 is then fixedly mounted on the motor mounting plate 13. The output shaft of the servo motor 11 is directly connected to the lower end of the lead screw 6 via a coupling 12.

[0037] When the lifting machine needs to operate, the fixed plate 1 remains stationary. The servo motor 11 is started, and its output shaft drives the lead screw 6 to rotate via the coupling 12. Since the lead screw nut 7 is fixed to the fixed plate 1 and cannot move, according to the principle of threaded transmission, the rotational motion of the lead screw 6 is converted into its own axial movement. Because the lower end of the lead screw 6 is fixed to the lower movable plate 3 by the first bearing seat 8, and the upper end is floatingly connected to the upper movable plate 2 via a deep groove ball bearing 9, the axial movement of the lead screw 6 directly pushes or pulls the lower movable plate 3 and the upper movable plate 2. Simultaneously, through the combined action of the four guide pillars 4 and the linear bearing 5, the upper movable plate 2, the lower movable plate 3, and the servo motor 11 mounted on the lower movable plate 3 act as a single unit, performing synchronized lifting or lowering movements.

[0038] In addition, a buffer limiting mechanism is provided, comprising a first buffer block 15 and a second buffer block 16. The first buffer block 15 is sleeved on the guide post 4 and located on the side of the linear bearing 5 near the upper movable plate 2. The second buffer block 16 is sleeved on the guide post 4 and disposed on the lower movable plate 3. When the movable plate assembly rises or falls to its limit position, the first buffer block 15 or the second buffer block 16 will contact the fixed plate 1 or the linear bearing 5, absorbing the impact energy through its own elastic deformation, thereby mechanically limiting the up-and-down movement and preventing damage to the mechanical structure due to overshoot. In this embodiment, the first buffer block 15 and the second buffer block 16 can be made of rubber material.

[0039] In addition, a connecting rod 17 is included, with its two ends connected to the upper movable plate 2 and the lower movable plate 3, respectively, and moving synchronously with the movable plates. A sensing plate 18 is fixedly mounted on the fixed plate 1. An adjustable first sensor 19 and a second sensor 20 are mounted on the connecting rod 17. In this embodiment, the first sensor 19 and the second sensor 20 can be proximity switches or photoelectric sensors. Specifically, a longitudinally extending guide groove 1701 is formed on the connecting rod 17. The first sensor 19 and the second sensor 20 are mounted through a sliding connector 21 that is slidably connected in the guide groove 1701. The guide groove 1701 is a groove with a T-shaped cross-section, and the sliding connector 21 is a T-shaped structure that matches its shape, so that the sliding connector 21 is slidably connected to the guide groove 1701 without loosening; the sliding connector 21 is provided with a screw hole 2101 for locking. After the sensor position is adjusted, tightening the screw to press against the guide groove 1701 will fix it.

[0040] When the upper movable plate 2 and the lower movable plate 3 move, the connecting rod 17 moves accordingly, causing the first sensor 19 and the second sensor 20 to move relative to the sensing plate 18. That is, when the detection areas of the first sensor 19 and the second sensor 20 pass through the sensing plate 18, they will react and generate a signal. This signal is transmitted to the servo motor 11, indicating that the height has been reached, thus stopping the servo motor 11 and achieving soft limit protection for vertical movement. This soft limit, combined with the aforementioned mechanical hard limit, constitutes dual safety protection.

[0041] This invention forms a stable frame structure by providing guide devices at the corners of the fixed plate 1, which effectively resists the torque generated by load eccentricity, ensuring a smooth and wobbly lifting process. Furthermore, the servo motor 11 is mounted on the lower movable plate 3, moving with it, which not only reduces the space occupied by the lifting machine and makes the overall structure more compact, but also facilitates application in space-constrained automated production lines. In addition, the upper end of the lead screw 6 is supported by a deep groove ball bearing 9, which not only ensures the centering of the lead screw transmission and compensates for minor errors that may occur during installation and operation, but also, in conjunction with the detachable connection of the first bearing seat 8, allows for flexible replacement of lead screws 6 of different diameters according to actual load and precision requirements, making it very convenient.

[0042] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the 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. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lifting machine that links a lead screw with a four-axis motor, characterized in that, include: The fixed plate (1), the upper movable plate (2), the lower movable plate (3) and the guide device, the guide device includes several guide posts (4) and linear bearings (5) correspondingly arranged on the fixed plate (1). The two ends of the guide posts (4) are respectively connected to the upper movable plate (2) and the lower movable plate (3) and pass through the linear bearings (5) so that the upper movable plate (2) and the lower movable plate (3) can move vertically relative to the fixed plate (1); It also includes a lead screw (6) and a lead screw nut (7). The lower movable plate (3) is detachably connected to a first bearing seat (8). The lower end of the lead screw (6) is fixed to the lower movable plate (3) through the first bearing seat (8). The upper end of the lead screw (6) is supported on the upper movable plate (2) in a floating manner through a deep groove ball bearing (9). The deep groove ball bearing (9) is installed in a bearing flange (10). The bearing flange (10) is fixed to the upper movable plate (2). The lead screw nut (7) is fixedly installed on the fixed plate (1) and is used in conjunction with the lead screw (6); It also includes a servo motor (11), which is fixed to the lower movable plate (3), and the output shaft of the servo motor (11) is connected to the lower end of the lead screw (6) through a coupling (12); The fixed plate (1) is fixed. When the servo motor (11) drives the lead screw (6) to rotate, the rotational motion of the lead screw (6) is converted into the axial movement of the lead screw (6) itself, thereby driving the upper movable plate (2), the lower movable plate (3) and the servo motor (11) to perform synchronous lifting or lowering motion as a whole.

2. The lead screw and four-axis motor linkage lifting machine according to claim 1, characterized in that, The number of the guiding devices is four sets. The guide posts (4) and linear bearings (5) are distributed at the adjacent corners of the fixed plate (1) to form a four-axis guiding mechanism to resist the off-center load torque.

3. The lead screw and four-axis motor linkage lifting machine according to claim 1, characterized in that, It also includes a motor mounting plate (13) and several motor support columns (14), one end of which is connected to the lower movable plate (3) and the other end is connected to the motor mounting plate (13), and the servo motor (11) is fixedly installed on the motor mounting plate (13).

4. The lead screw and four-axis motor linkage lifting machine according to any one of claims 1 to 3, characterized in that, It also includes a buffer limiting mechanism, which includes a first buffer block (15) and a second buffer block (16) sleeved on the guide post (4). The first buffer block (15) is disposed on the side of the linear bearing (5) near the upper movable plate (2), and the second buffer block (16) is disposed on the lower movable plate (3) to form a mechanical hard limit for up and down movement.

5. The lead screw and four-axis motor linkage lifting machine according to claim 4, characterized in that, It also includes a connecting rod (17), the two ends of which are connected to the upper movable plate (2) and the lower movable plate (3) respectively; a sensing plate (18) is provided on the fixed plate (1), and a first sensor (19) and a second sensor (20) with adjustable position are provided on the connecting rod (17). The sensing plate (18) moves with the movable plate and can be detected by the first sensor (19) and the second sensor (20) to form a soft limit protection for up and down movement.

6. The lead screw and four-axis motor linkage lifting machine according to claim 5, characterized in that, The connecting rod (17) has a longitudinally extending guide groove (1701), and the first sensor (19) and the second sensor (20) are mounted by a sliding member (21) slidably connected in the guide groove (1701), the sliding member (21) having a screw hole (2101) for locking.

7. The lead screw and four-axis motor linkage lifting machine according to claim 1, characterized in that, The top end of the lead screw (6) is provided with a groove (601), and a retaining spring (22) is installed in the groove (601) to prevent the top end of the lead screw (6) from axially disengaging from the deep groove ball bearing (9).

8. The lead screw and four-axis motor linkage lifting machine according to claim 1, characterized in that, The upper movable plate (2), the lower movable plate (3), and the guide post (4) are detachably connected.

9. The lead screw and four-axis motor linkage lifting machine according to claim 1, characterized in that, The lead screw nut (7) is detachably fixed to the fixing plate (1) by bolts.

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