Screw rod follow-up supporting mechanism

Abstract

The utility model discloses a lead screw follow-up supporting mechanism which comprises a power part and a lead screw connected with the output end of the power part, the lead screw is further provided with a supporting mechanism and a feedback part, and the feedback part is used for detecting and correcting displacement errors. The supporting mechanism comprises a sliding rail arranged below the lead screw, a first sliding piece, a second sliding piece and a third sliding piece, the first sliding piece, the second sliding piece and the third sliding piece slide on the sliding rail, at least two sets of stress rods are fixedly connected between the first sliding piece and the second sliding piece, and at least two sets of limiting rods are arranged between the second sliding piece and the third sliding piece. The limiting rod is sleeved with a first elastic element, and a driving piece is further arranged between the first sliding piece and the second sliding piece. According to the utility model, the influence caused by droop of the screw rod is effectively controlled, the position movement error caused by distortion of the screw rod can be well compensated, and the manufacturing precision and the manufacturing efficiency are effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical processing, in particular to a screw rod follower support mechanism. Background Art

[0002] In the field of heavy and large parts processing and manufacturing (such as aerospace, shipbuilding, high-speed rail and other parts), there are many manufacturing difficulties, such as heavy workpiece weight, large volume, high precision requirements, and long processing time.

[0003] At present, the weight of the workpiece processed by the equipment has reached 30 tons. After adding the weight of the workbench, the total weight that the X-axis lead screw needs to push or pull has exceeded 45 tons of parts. Therefore, from the moment of static to moving, or from moving to static, the lead screw needs to withstand a large torsional torque. Therefore, the lead screw will be deformed due to the torsional torque, resulting in the movement accuracy of the equipment not meeting the standard, and then causing problems such as inadequate or over-processing of the workpiece. Summary of the invention

[0004] The main technical problem solved by the utility model is that when the screw rod is subjected to a large twisting torque, the screw rod will be deformed due to the twisting torque, resulting in the movement accuracy of the equipment not meeting the standard, and then causing the problem of inadequate or over-processing of the workpiece.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is:

[0006] A screw follower support mechanism comprises a power unit and a screw connected to an output end of the power unit, wherein the screw is further provided with a support mechanism and a feedback unit, wherein the feedback unit is used to detect and correct displacement errors;

[0007] The support mechanism comprises a slide rail arranged below the screw rod and a first slide member, a second slide member and a third slide member sliding on the slide rail, at least two groups of force rods are fixedly connected between the first slide member and the second slide member, at least two groups of limit rods are arranged between the second slide member and the third slide member, a first elastic element is sleeved on the limit rod, and a driving member is also arranged between the first slide member and the second slide member;

[0008] The driving member includes a slider sliding on the slide rail and a connecting plate fixed on the slider. A guide column is provided between the first slider and the second slider. The slider slides on the guide column. A second elastic element is provided on the guide column. The second elastic element is located between the slider and the second slider.

[0009] Furthermore, the feedback part includes a support seat and an encoder arranged in the support seat, the end of the screw rod away from the power part is connected to the support seat, the screw rod rotates in the support seat, the encoder is connected to the screw rod, and detects the displacement error in real time.

[0010] Furthermore, the first sliding member is provided with a U-shaped groove for accommodating the screw rod, and the screw rod slides in the U-shaped groove. Earmuffs for sliding on the force-bearing rod are respectively provided on both sides of the first sliding member.

[0011] Furthermore, the slider is also provided with a through hole for accommodating the screw rod, and the inner side wall of the through hole is provided with a thread matching with the screw rod. When the screw rod rotates, the slider can be driven to slide on the slide rail.

[0012] Beneficial effects of the utility model:

[0013] The driving member of the present application slides between the first sliding member and the second sliding member, and the first sliding member and the second sliding member provide two-point support and force points. When the driving member moves to the end of the second sliding member, due to the presence of the second elastic element, when the movement reaches the limit of the elastic element, the second sliding member can be supported and moved forward, so that a follow-up support mechanism is always provided under the driving member, thereby reducing deformation of the extra-long lead screw and improving processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the overall structure provided by the utility model;

[0016] Figure 2 yes Figure 1 A is a partial enlarged schematic diagram;

[0017] Figure 3 yes Figure 1 A partial enlarged schematic diagram of B in the middle;

[0018] Figure 4 yes Figure 1 A partial enlarged schematic diagram of C in the middle;

[0019] Figure 5 is a schematic structural diagram of a first sliding member;

[0020] Figure 6It is a schematic diagram of the driving component structure;

[0021] Figure 7 is a schematic diagram of the support mechanism;

[0022] Figure 8 It is a schematic diagram of the usage status;

[0023] Description of reference numerals:

[0024] 1. Power unit; 2. Feedback unit; 21. Support seat; 22. Encoder; 3. Screw rod; 4. Support mechanism; 41. First sliding member; 411. U-shaped groove; 412. Earmuff; 42. Second sliding member; 43. Third sliding member; 44. Slide rail; 45. Force rod; 46. Driving member; 461. Sliding block; 461-1. Through hole; 462. Guide column; 463. Second elastic element; 464. Connecting plate; 47. Limit rod; 48. First elastic element; 5. Heavy equipment. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention. Specific embodiment 1:

[0027] like Figures 1 to 8 As shown, a screw follower support mechanism includes a power unit 1 and a screw 3 connected to the output end of the power unit 1, the screw 3 is also provided with a support mechanism 4 and a feedback unit 2, and the feedback unit 2 is used to detect and correct displacement errors; specifically, the feedback unit 2 includes a support seat 21 and an encoder 22 arranged in the support seat 21, the screw 3 is connected to the support seat 21 at one end away from the power unit 1, the screw 3 rotates in the support seat 21, the encoder 22 is connected to the screw 3, and detects the displacement error in real time, and the encoder is a conventional electrical component, the principle is that each reference angle sends a unique binary value corresponding to the angle, and multiple positions can be recorded and measured through an external circle recording device. The output of the absolute encoder can directly reflect the absolute angle within the range of 360°. The absolute position can be identified by the amplitude of the output signal or the physical encoding scale of the grating. If the encoder is connected to the lead screw, the angular velocity of the lead screw can be directly recorded, which is converted into the displacement distance. The measured displacement distance is then calculated by subtracting the distance required to be moved to obtain the error, and then the parameters are selected for correction based on this error.

[0028] The support mechanism 4 includes a slide rail 44 arranged below the screw rod 3 and a first slide member 41, a second slide member 42, and a third slide member 43 sliding on the slide rail 44, two groups of force rods 45 are fixedly connected between the first slide member 41 and the second slide member 42, two groups of limit rods 47 are arranged between the second slide member 42 and the third slide member 43, and a first elastic element 48 is sleeved on the limit rod 47, and a driving member 46 is also arranged between the first slide member 41 and the second slide member 42;

[0029] The driving member 46 includes a slider 461 sliding on the slide rail 44 and a connecting plate 464 fixed on the slider 461. A guide column 462 is further provided between the first slide member 41 and the second slide member 42. The slider 461 slides on the guide column 462. A second elastic element 463 is further provided on the guide column 462. The second elastic element 463 is located between the slider 461 and the second slide member 42. Specifically, the first slide member 41 is provided with a U-shaped groove 411 for accommodating the screw rod 3. The screw rod 3 slides in the U-shaped groove 411. Ear sleeves 412 for sliding on the force-bearing rod 45 are further provided on both sides of the first slide member 41. Specifically, the slider 461 is further provided with a through hole 461-1 for accommodating the screw rod 3. The inner side wall of the through hole 461-1 is provided with a thread matching the screw rod 3. When the screw rod 3 rotates, the slider 461 can be driven to slide on the slide rail 44.

[0030] Working principle:

[0031] First, the power unit directly drives the screw rod to rotate, thereby driving the driving member to slide back and forth on the slide rail, and the driving member is fixedly connected to the heavy equipment above, thereby driving the heavy equipment to move. Traditional screw rods do not have a supporting mechanism, so when the screw rod drives the driving member to slide to the middle section or the end, it will be deformed due to gravity, affecting the displacement accuracy. This situation is very common in heavy equipment, and deformation will affect the service life. The driving member of the present application slides between the first sliding member and the second sliding member. The first sliding member and the second sliding member provide two-point support and force points. When the driving member is displaced to the end of the second sliding member, due to the presence of the second elastic element, when the movement reaches the limit of the elastic element, it can support the second sliding member and follow the forward movement, so that the driving member always has a support point.

[0032] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A screw follower support mechanism, comprising a power unit (1) and a screw (3) connected to an output end of the power unit (1), characterized in that: The screw rod (3) is also provided with a support mechanism (4) and a feedback unit (2), and the feedback unit (2) is used to detect and correct displacement errors; The support mechanism (4) comprises a slide rail (44) arranged below the screw rod (3) and a first slide member (41), a second slide member (42) and a third slide member (43) sliding on the slide rail (44); at least two groups of force rods (45) are fixedly connected between the first slide member (41) and the second slide member (42); at least two groups of limit rods (47) are arranged between the second slide member (42) and the third slide member (43); a first elastic element (48) is sleeved on the limit rod (47); and a driving member (46) is also arranged between the first slide member (41) and the second slide member (42); The driving member (46) comprises a slider (461) sliding on the slide rail (44) and a connecting plate (464) fixed on the slider (461); a guide column (462) is provided between the first slider (41) and the second slider (42); the slider (461) slides on the guide column (462); a second elastic element (463) is provided on the guide column (462); the second elastic element (463) is located between the slider (461) and the second slider (42).

2. A screw follower support mechanism according to claim 1, characterized in that: The feedback part (2) comprises a support seat (21) and an encoder (22) arranged in the support seat (21); the end of the screw rod (3) away from the power part (1) is connected to the support seat (21); the screw rod (3) rotates in the support seat (21); the encoder (22) is connected to the screw rod (3) and detects displacement error in real time.

3. The screw follower support mechanism according to claim 1, characterized in that: The first sliding member (41) is provided with a U-shaped groove (411) for accommodating the screw rod (3), and the screw rod (3) slides in the U-shaped groove (411). Ear sleeves (412) for sliding on the force-bearing rod (45) are also provided on both sides of the first sliding member (41).

4. The screw follower support mechanism according to claim 1, characterized in that: The slider (461) is also provided with a through hole (461-1) for accommodating the screw rod (3); the inner wall of the through hole (461-1) is provided with a thread matching the screw rod (3); when the screw rod (3) rotates, the slider (461) can be driven to slide on the slide rail (44).

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