Screw rod transmission stable supporting device

Abstract

The utility model relates to the technical field of lead screw transmission, in particular to a lead screw transmission stable supporting device which comprises bearing seats installed on the left side and the right side of the top of a base, lead screws are rotationally connected into the bearing seats, nuts are connected to the lead screws in a threaded mode, and a supporting frame is installed on the right side of the top of the base and located on the left side of the bearing seat on the right side. A memory spring is installed between the supporting frame and the right bearing seat, a limiting groove is formed in the right side of the top of the base and located at the bottom of the right bearing seat, and a sliding plate slidably connected into the limiting groove is installed at the bottom of the right bearing seat. When the lead screw is heated to expand due to heat generated by friction between the lead screw and the nut, the memory spring is synchronously heated to extend, so that the sliding plate at the bottom of the bearing seat on the right side is pushed to slide towards the right side along the inner wall of the limiting groove, a compensation space is provided for expansion of the lead screw, axial force generated by the lead screw due to blocking of expansion and extension is reduced, and the service life of the lead screw is prolonged. And axial movement is avoided.

Description

Technical Field

[0001] This utility model relates to the field of lead screw transmission technology, and in particular to a lead screw transmission stabilizing support device. Background Technology

[0002] For example, Chinese patent CN203636503U discloses a screw drive stabilizing support device. When the screw rotates, the screw nut moves relative to the screw, and the stabilizing support, connected to the screw nut, moves accordingly, driving the worktable to move along the guide rail. When the screw runs in the X or Y direction due to manufacturing errors, the bidirectional swing of the stabilizing support causes the middle ring sleeve to swing at a small angle around the X or Y axis, eliminating the error at the middle ring sleeve and preventing it from being transmitted to the worktable, thus maintaining a relatively stable transmission motion between the worktable and the screw.

[0003] During operation, the temperature of the lead screw rises due to friction between the lead screw and the nut, as well as heat conduction from the motor. According to the principle of thermal expansion and contraction, the lead screw will expand, and its length will increase with the increase in temperature. This will cause axial movement of the lead screw, reduce its stability, and reduce the transmission accuracy. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a stabilizing support device for lead screw drives, which solves the technical problem that lead screws generate heat through friction, expand, and subsequently experience axial movement, leading to decreased stability and transmission accuracy. This device achieves the goal of improving the stability of lead screw drives.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a screw drive stabilizing support device, including bearing seats installed on the left and right sides of the top of the base, and a screw is rotatably connected inside the bearing seats. A nut is threaded onto the screw. A motor that drives the screw to rotate is installed on the right bearing seat. A support frame is installed on the right side of the top of the base and on the left side of the right bearing seat. A memory spring is installed between the support frame and the right bearing seat. A limit groove is formed on the right side of the top of the base and at the bottom of the right bearing seat. A sliding plate is slidably connected to the limit groove at the bottom of the right bearing seat. A stabilizing mechanism for lubricating and cooling the connection between the nut and the screw is provided on the nut.

[0006] A further improvement is that a sleeve located inside the memory spring is installed on the support frame, and a telescopic sleeve rod whose outer end is connected to the right bearing seat is slidably connected inside the sleeve.

[0007] A further improvement is that the sleeve is fitted onto the lead screw, and the inner wall of the sleeve is provided with an internal thread that is compatible with the lead screw.

[0008] A further improvement is that the stabilization mechanism includes an oil inlet hole at the top of the nut, and an oil outlet hole perpendicular to the oil inlet hole is provided at the bottom of the base. A return pipe is installed at the bottom of the oil outlet hole, and an oil cylinder is installed at the bottom of the return pipe. A micro pump is installed on the oil cylinder, and a delivery pipe extending into the oil inlet hole is installed at the liquid outlet of the micro pump.

[0009] A further improvement is that the nut has symmetrical oil sealing grooves on both the left and right sides inside, and each of the two oil sealing grooves has a drainage groove connected to the oil drain hole.

[0010] A further improvement is that a T-shaped groove is provided on the top of the base, and a T-shaped slider is installed at the bottom of the oil cylinder, which is slidably connected to the inner wall of the T-shaped groove.

[0011] By employing the above technical solution, this utility model provides a screw drive stabilizing support device, which has at least the following beneficial effects:

[0012] 1. When the lead screw and nut rub against each other and generate heat, causing the lead screw to expand due to heat, the memory spring also expands synchronously due to heat, thereby pushing the slide plate at the bottom of the right bearing seat to slide to the right along the inner wall of the limiting groove, thus providing compensation space for the expansion of the lead screw, thereby reducing the axial force generated by the lead screw due to the obstruction of expansion and extension, and avoiding axial movement.

[0013] 2. This utility model uses a micro pump to pump lubricating oil from the oil cylinder into the infusion pipe, and then injects it into the screw through the oil inlet hole, thereby lubricating the nut, reducing the friction between the screw and the nut, and cooling the contact area between the screw and the nut, thus minimizing the risk of the screw expanding due to heat and causing axial movement. Attached Figure Description

[0014] The accompanying drawings, which are provided to further understand this application and constitute a part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0015] In the attached diagram:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a partially enlarged structural schematic diagram of the present invention;

[0018] Figure 3 This is a partially enlarged cross-sectional view of the present invention.

[0019] Figure 4 This is a side view sectional structural diagram of the nut and stabilization mechanism of this utility model;

[0020] Figure 5This is a cross-sectional view of the internal structure of the nut of this utility model.

[0021] In the diagram: 1. Base; 2. Bearing housing; 3. Lead screw; 4. Nut; 5. Motor; 6. Support frame; 7. Memory spring; 8. Limiting groove; 9. Slide plate;

[0022] 10. Stabilization mechanism; 101. Oil inlet; 102. Oil outlet; 103. Return pipe; 104. Oil cylinder; 105. Micro pump; 106. Infusion pipe; 107. Oil sealing groove; 108. Drainage groove; 109. T-shaped slide; 110. T-shaped slider;

[0023] 11. Sleeve; 12. Telescopic sleeve. Detailed Implementation

[0024] 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.

[0025] Example 1

[0026] To address the existing problems of lead screw friction generating heat and causing expansion, which in turn leads to axial movement of the lead screw, resulting in decreased stability and reduced transmission accuracy, this embodiment provides a lead screw transmission stabilizing support device. Please refer to [reference needed]. Figures 1-5 This can improve the stability of the lead screw drive. The screw drive stabilizing support device includes bearing seats 2 installed on the left and right sides of the top of the base 1, with a screw 3 rotatably connected inside the bearing seats 2. A nut 4 is threaded onto the screw 3. A motor 5 that drives the screw 3 to rotate is installed on the right bearing seat 2. A support frame 6 is installed on the right side of the top of the base 1 and on the left side of the right bearing seat 2. A memory spring 7 is installed between the support frame 6 and the right bearing seat 2. A limit groove 8 is opened on the right side of the top of the base 1 and at the bottom of the right bearing seat 2. A sliding plate 9 is slidably connected to the limit groove 8. A stabilizing mechanism 10 is provided on the nut 4 to lubricate and cool the connection between the nut 4 and the screw 3. When the screw 3 and the nut 4 generate heat through friction, causing the screw 3 to expand, the memory spring 7 also expands synchronously, thereby pushing the sliding plate 9 at the bottom of the right bearing seat 2 to slide to the right along the inner wall of the limit groove 8. This provides compensation space for the expansion of the screw 3, thereby reducing the axial force generated by the screw 3 due to the obstruction of expansion and preventing axial movement.

[0027] To ensure that the memory spring 7 can extend or retract synchronously with the temperature change of the lead screw 3, a sleeve 11 located inside the memory spring 7 is installed on the support frame 6 in the device, and a telescopic sleeve 12 with its outer end connected to the right bearing seat 2 is slidably connected inside the sleeve 11.

[0028] The sleeve 11 is fitted onto the lead screw 3, and the inner wall of the sleeve 11 is provided with an internal thread that is compatible with the lead screw 3. The sleeve 11 contacts the lead screw 3, thereby transferring the heat of the lead screw 3 to the memory spring 7 synchronously, so that it can be synchronized with the expansion and extension of the lead screw 3, thus providing adaptive compensation force for the lead screw 3. In addition, the sleeve 11 and the telescopic sleeve 12 can prevent the memory spring 7 from being distorted.

[0029] Example 2

[0030] To minimize the risk of thermal expansion of the lead screw 3 due to friction with the nut 4, which could lead to transmission errors, based on Example 1, as follows... Figures 1-5 As shown, the device also includes a stabilization mechanism 10, which includes an oil inlet 101 at the top of the nut 4, and an oil outlet 102 perpendicular to the oil inlet 101 at the bottom of the base 1. A return pipe 103 is installed at the bottom of the oil outlet 102, and an oil cylinder 104 is installed at the bottom of the return pipe 103. A micro pump 105 is installed on the oil cylinder 104, and a delivery pipe 106 extending from the top into the oil inlet 101 is installed at the outlet port of the micro pump 105. When the nut 4 is in When the lead screw 3 moves, the micro pump 105 is started to pump the lubricating oil in the oil cylinder 104 into the infusion pipe 106, and then inject it into the nut 4 through the oil inlet hole 101, thereby lubricating the nut 4, reducing the friction between the lead screw 3 and the nut 4, and cooling the contact position between the lead screw 3 and the nut 4, so as to avoid the lead screw 3 from expanding due to heat and causing axial movement. The excess lubricating oil flows into the return pipe 103 through the oil drain hole 102 and returns to the oil cylinder 104 for recycling.

[0031] To prevent excess lubricating oil from overflowing from both sides of the nut 4 and contaminating the processing environment, the device has symmetrically provided oil sealing grooves 107 on the left and right sides inside the nut 4. Both oil sealing grooves 107 are provided with drainage grooves 108 connected to the oil drain hole 102. After lubrication, excess lubricating oil flows into the oil sealing grooves 107 and is guided into the oil drain hole 102 through the drainage grooves 108, and finally flows back into the oil cylinder 104, thereby preventing excess lubricating oil from overflowing from both sides of the nut 4.

[0032] To prevent the screw 3 from deforming due to pressure from the upper layer, a T-shaped groove 109 is provided on the top of the base 1 in this device, and a T-shaped slider 110 is installed at the bottom of the oil cylinder 104 and is slidably connected to the inner wall of the T-shaped groove 109. As the nut 4 moves, the T-shaped slider 110 at the bottom of the oil cylinder 104 below it slides left and right along the T-shaped groove 109, thereby providing support for the nut 4 and preventing the screw 3 from being deformed due to pressure, which would affect the stable transmission of the screw 3. The cooperation between the T-shaped groove 109 and the T-shaped slider 110 also improves the movement stability of the nut 4.

[0033] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screw drive stable support device, comprising bearing seats (2) mounted on the top of the base (1) on both sides, and a screw rod (3) is rotatably connected in the bearing seat (2), a nut (4) is threadedly connected on the screw rod (3), a motor (5) is mounted on the right bearing seat (2) to drive the rotation of the screw rod (3), characterized in that: The right side of the top of the base (1) and the left side of the right side bearing seat (2) are provided with a support frame (6), and a memory spring (7) is arranged between the support frame (6) and the right side bearing seat (2), the right side of the top of the base (1) and the bottom of the right side bearing seat (2) are provided with a limiting groove (8), and the bottom of the right side bearing seat (2) is provided with a sliding plate (9) slidably connected in the limiting groove (8), and the nut (4) is provided with a stability mechanism (10) for lubricating and cooling the connection between the nut (4) and the lead screw (3).

2. The stable support device for a lead screw drive according to claim 1, characterized by: The support frame (6) is provided with a sleeve (11) arranged in the memory spring (7), and the sleeve (11) is slidably connected with a telescopic sleeve rod (12) having an outer end connected with the right side bearing seat (2).

3. A stable support device for a lead screw drive according to claim 2, characterized in that: The sleeve (11) is sleeved on the lead screw (3), and the inner wall of the sleeve (11) is provided with an internal thread matched with the lead screw (3).

4. The stable support device for a lead screw drive according to claim 1, characterized by: The stability mechanism (10) comprises an oil inlet hole (101) formed in the top of the nut (4), and the bottom of the base (1) is provided with an oil outlet hole (102) vertically opposite to the oil inlet hole (101), the bottom of the oil outlet hole (102) is provided with a backflow pipe (103), and the bottom of the backflow pipe (103) is provided with an oil cylinder (104), the oil cylinder (104) is provided with a micro pump (105), and the liquid outlet of the micro pump (105) is provided with a liquid delivery pipe (106) extending into the oil inlet hole (101).

5. A stable support device for a lead screw drive according to claim 4, characterized in that: The left and right sides of the nut (4) are symmetrically provided with oil sealing grooves (107), and the two oil sealing grooves (107) are provided with drainage grooves (108) connected with the oil outlet hole (102).

6. The stable support device for a lead screw drive according to claim 4, wherein: The top of the base (1) is provided with a T-shaped sliding groove (109), and the bottom of the oil cylinder (104) is provided with a T-shaped sliding block (110) slidably connected with the inner wall of the T-shaped sliding groove (109).

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