A screw rod structure with reduced installation requirements

Abstract

The utility model relates to the technical field of screw rod structures, and in particular to a screw rod structure with reduced installation requirements, comprising a guide rail installed on a frame, and a movable plate sliding on the guide rail, wherein two screw rod seats are fixed above the frame, and a screw rod is rotatably connected between the two screw rod seats; wherein a nut is threadedly connected to the outer side of the screw rod, and a floating mechanism connected to the nut is provided at the bottom of the movable plate. In the utility model, a receiving hole is provided on the end face of the nut seat, so that the nut retains two degrees of freedom and is not fixed in the radial direction of the screw rod, so that the distance between the screw rod and the guide rail is floating during installation, thereby reducing the screw rod installation requirements and the accuracy of related parts, so it is not sensitive to the position of the nut seat relative to the screw rod seat, that is, it does not need to be matched very accurately during assembly, and the processing requirements of the parts screw rod seat, nut seat, movable plate and frame can also be reduced accordingly.

Description

Technical Field

[0001] The utility model relates to the technical field of screw rod structures, in particular to a screw rod structure with reduced installation requirements. Background Art

[0002] In modern office supplies, such as collating machines, transport and transfer mechanisms are key components for efficient and precise operation. Such mechanisms usually use a design that combines a lead screw with a guide rail slider to achieve the conversion from rotary motion to linear motion. This design requires a high degree of parallelism between the lead screw and the guide rail slider to ensure smooth motion and accurate positioning.

[0003] The high parallelism requirement for the screw and guide rail brings about high processing accuracy requirements, resulting in increased processing costs, complicated installation and debugging processes, and requires technicians to have a high level of skills.

[0004] In order to overcome these problems, we propose a screw structure with reduced installation requirements, aiming to reduce the parallelism requirement between the screw and the guide rail slider. Utility Model Content

[0005] The utility model aims to solve the shortcomings of the prior art, such as increased processing cost, complicated installation and debugging process, and proposes a screw rod structure with reduced installation requirements.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A screw rod structure with reduced installation requirements is designed, comprising a guide rail installed on a frame, and a movable plate sliding on the guide rail, two screw rod seats are fixed above the frame, and a screw rod is rotatably connected between the two screw rod seats;

[0008] A nut is threadedly connected to the outer side of the screw rod, a floating mechanism connected to the nut is arranged at the bottom of the movable plate, and the nut has a planar movable space in the floating mechanism.

[0009] Furthermore, the floating mechanism includes a nut seat fixed to the bottom of the movable plate, an accommodating hole for accommodating the nut is provided on the end surface of the nut seat, and the end of the nut has a stop ring protrusion that abuts against the nut seat.

[0010] Furthermore, the diameter of the accommodating hole is larger than the outer diameter of the nut to form a planar movable space for the nut.

[0011] Furthermore, a pressure plate is fastened on the outer side of the nut seat, the pressure plate is in a bent structure, and at least partially stops on the outer side of the stop ring convex.

[0012] Furthermore, a notch is provided at the bottom of the nut seat, a positioning pin is fixedly installed at the bottom of the nut, and the positioning pin is clamped in the notch.

[0013] Furthermore, a bearing is embedded in the screw seat, and the bearing is threadedly connected to the screw.

[0014] The utility model proposes a screw rod structure with reduced installation requirements, and its beneficial effect is that: in the utility model, a receiving hole is provided on the end face of the nut seat, so that the nut retains two degrees of freedom and is not fixed in the radial direction of the screw rod, so that the distance between the screw rod and the guide rail is floating during installation, thereby reducing the screw rod installation requirements and the accuracy of related parts, so it is not sensitive to the position of the nut seat relative to the screw rod seat, that is, it does not need to be matched very accurately during assembly, and the processing requirements of the parts screw rod seat, nut seat, movable plate and frame can also be reduced accordingly. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 This is a schematic diagram of the pressing plate structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the positioning pin structure of the utility model.

[0018] In the figure: 1, frame; 2, guide rail; 3, moving plate; 4, screw seat; 5, screw; 6, nut; 61, stop ring convex; 7, floating mechanism; 71, nut seat; 72, receiving hole; 73, pressure plate; 74, notch; 75, positioning pin. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Reference Figure 1-3 An embodiment of the utility model discloses a screw rod structure with reduced installation requirements, the screw rod structure comprises a guide rail 2 mounted on a frame 1, and a movable plate 3 sliding on the guide rail 2, further, two screw rod seats 4 are fixed above the frame 1, and a screw rod 5 is rotatably connected between the two screw rod seats 4;

[0021] A nut 6 is threadedly connected to the outer side of the screw rod 5 , and a floating mechanism 7 connected to the nut 6 is disposed at the bottom of the movable plate 3 . The nut 6 has a planar movable space in the floating mechanism 7 .

[0022] In some embodiments, the floating mechanism 7 described in the utility model includes a nut seat 71 fixed to the bottom of the movable plate 3, and a receiving hole 72 for accommodating the nut 6 is provided on the end face of the nut seat 71, and the end of the nut 6 has a stop ring protrusion 61 that abuts against the nut seat 71.

[0023] On the basis of the above embodiment, the diameter of the accommodating hole 72 is larger than the outer diameter of the nut 6 to form a planar movable space for the nut 6 .

[0024] That is to say, in this embodiment, the length direction of the screw rod 5 is the first direction, the nut seat 71 is an L-shaped structure, and its upper side is connected to the bottom of the movable plate 3 by fasteners such as bolts, and the length direction and width direction of the lower bending surface of the nut seat 71 are respectively set as the second direction and the third direction, and the nut 6 is movably set in the second direction and the third direction to reduce the installation accuracy requirements for the nut 6.

[0025] Of course, considering the first direction limitation of the nut 6 to keep it stably fastened to the nut seat 71 in the first direction, in this embodiment, a pressure plate 73 is also fastened to the outside of the nut seat 71. The pressure plate 73 has a bent structure and is at least partially stopped on the outside of the stop ring convex 61. That is to say, in this embodiment, the pressure plate 73 is designed to abut against the outside of the stop ring convex 61 to limit the stop ring convex 61 between the nut seat 71 and the pressure plate 73, so as to achieve the first direction limitation of the nut 6 and ensure that it can stably drive the movable plate 3 to move.

[0026] In some embodiments, in the utility model, a notch 74 is provided at the bottom of the nut seat 71, and a positioning pin 75 is fixedly installed at the bottom of the nut 6, and the positioning pin 75 is clamped in the notch 74. Specifically, in this embodiment, the notch 74 is provided to fix the positioning pin 75 to achieve circumferential position locking of the nut 6, thereby preventing the nut 6 from rotating with the screw rod 5 to achieve a limiting effect.

[0027] It should be noted that in this embodiment, a bearing is embedded inside the screw seat 4 , and the bearing is threadedly connected to the screw 5 .

[0028] In summary, in this embodiment, the nut 6 is not directly fixed on the screw nut seat 71, but the relative movement of the nut 6 relative to the nut seat 71 in the first direction and the rotation around the first direction are restricted by the pressing plate 73 and the positioning pin 75;

[0029] After installation, the nut 6 can move in the second direction and the third direction relative to the nut seat 71. During the assembly process, the nut 6 is installed on the movable plate 3 through the nut seat 71, the screw rod 5 is installed on the frame 1 through the screw rod seat 4, and the nut 6 is sleeved on the screw rod 5. Because the nut 6 can float in the second direction and the third direction relative to the nut seat 71, it is not sensitive to the position of the nut seat 71 relative to the screw rod seat 4, that is, it does not need to be matched very accurately during assembly, and the processing requirements of the parts screw rod seat 4, nut seat 71, movable plate 3, and frame 1 can also be reduced accordingly.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A screw rod structure with reduced installation requirements, comprising a guide rail (2) mounted on a frame (1), and a moving plate (3) sliding on the guide rail (2), characterized in that: Two screw rod seats (4) are fixed above the frame (1), and a screw rod (5) is rotatably connected between the two screw rod seats (4); A nut (6) is threadedly connected to the outer side of the screw rod (5), a floating mechanism (7) connected to the nut (6) is provided at the bottom of the movable plate (3), and the nut (6) has a planar movable space in the floating mechanism (7).

2. A screw rod structure with reduced installation requirements according to claim 1, characterized in that: The floating mechanism (7) comprises a nut seat (71) fixed to the bottom of the movable plate (3), an accommodating hole (72) for accommodating the nut (6) is provided on the end surface of the nut seat (71), and the end of the nut (6) has a stop ring protrusion (61) that abuts against the nut seat (71).

3. A screw rod structure with reduced installation requirements according to claim 2, characterized in that: The diameter of the accommodating hole (72) is greater than the outer diameter of the nut (6), so as to form a planar movable space for the nut (6).

4. The screw rod structure with reduced installation requirements according to claim 2, characterized in that: A pressure plate (73) is also fastened to the outer side of the nut seat (71); the pressure plate (73) is in a bent structure and at least partially stops at the outer side of the stop ring protrusion (61).

5. The screw rod structure with reduced installation requirements according to claim 2, characterized in that: A notch (74) is provided at the bottom of the nut seat (71), and a positioning pin (75) is fixedly mounted on the bottom of the nut (6), the positioning pin (75) being snap-fitted into the notch (74).

6. The screw rod structure with reduced installation requirements according to claim 1, characterized in that: A bearing is embedded inside the screw seat (4), and the bearing is threadedly connected to the screw (5).

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