A reversible self-locking ball screw device

Abstract

The utility model discloses a reversible self-locking ball screw device, including a screw and a nut threadedly connected to the outside of the screw, both ends of the screw are fixedly connected with a connecting shaft, one end of the connecting shaft opposite to the screw is provided with a mounting plate, the connecting shaft is rotatably connected to the mounting plate, the bottom of the inner wall of the mounting plate is fixedly connected with a baffle, the outside of the connecting shaft and the inside of the mounting plate are rotatably connected with a plurality of movable plates through a hinged rotating shaft, and the bottoms of the plurality of movable plates can all contact the outside of the mounting plate. Through the above structure, when the nut, the screw and the connecting shaft directly undergo reverse transmission, the rotation of the connecting shaft drives the movable plate to rotate in the reverse direction, and under the action of the connecting shaft, the rotating movable plate can be limited to prevent the movable plate from moving to the other side of the baffle after continuous rotation, thereby preventing the problem of reverse transmission. The structure is simple, and the screw can be well prevented from rotating in the opposite direction due to the action of external forces, and the use safety is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of ball screws, in particular to a reversible self-locking ball screw device. Background Art

[0002] Ball screws are ideal products for converting rotary motion into linear motion, or vice versa. They are the most commonly used transmission elements in tool machinery and precision machinery. Their main function is to convert rotary motion into linear motion, or torque into axial repetitive force. They are widely used in various industrial equipment and precision instruments.

[0003] In current ball screw devices, external brakes or locking devices are usually required to prevent the load from moving in reverse when it stops moving. These traditional locking devices are usually complex in structure, which may increase the complexity and cost of the system, and some improvements in material and surface treatment processes may be limited by material properties, processing accuracy, high processing difficulty, etc. Therefore, the utility model provides a reversible self-locking ball screw device to solve the problems raised in the above background technology. Utility Model Content

[0004] The utility model aims to provide a reversible self-locking ball screw device, which can prevent the problem of reverse transmission, has a simple structure, can well prevent the screw from rotating in the opposite direction due to external forces, and has higher safety in use.

[0005] To achieve the above-mentioned purpose, a reversible self-locking ball screw device is provided, comprising a screw and a nut threadedly connected to the outside of the screw, both ends of the screw are fixedly connected to connecting shafts, one end of the connecting shaft opposite to the screw is provided with a mounting plate, the connecting shaft is rotatably connected to the mounting plate, a baffle is fixedly connected to the bottom of the inner wall of the mounting plate, and a plurality of movable plates are rotatably connected to the outside of the connecting shaft and located on the inner side of the mounting plate through a hinged shaft, and the bottoms of the plurality of movable plates can be in contact with the outside of the mounting plate.

[0006] According to the reversible self-locking ball screw device, a first magnet is embedded in the interior of the mounting plate, and a second magnet is embedded in one end of a plurality of the movable plates close to the first magnet.

[0007] According to the reversible self-locking ball screw device, a plurality of movable plates are fixedly connected with a protrusion on one side close to the connecting shaft and opposite to the hinged rotating shaft.

[0008] According to the reversible self-locking ball screw device, both sides of the baffle are fixedly connected with soft pads.

[0009] According to the reversible self-locking ball screw device, a fixing plate is fixedly connected to the outer side of the mounting plate, the connecting shaft is rotatably connected to the fixing plate, and a plurality of through holes are evenly opened inside the fixing plate.

[0010] According to the reversible self-locking ball screw device, the rotation direction of the screw is that the hinge axis rotates toward one side of the adjacent protrusion.

[0011] The utility model has the following beneficial effects:

[0012] Compared with the prior art, this reversible self-locking ball screw device, when the nut, screw and connecting shaft directly undergo reverse transmission, the rotation of the connecting shaft drives the movable plate to rotate in the reverse direction, and under the action of the connecting shaft, the rotating movable plate can be limited to prevent the movable plate from moving to the other side of the baffle after continuous rotation, thereby preventing the problem of reverse transmission. The structure is simple, and it can effectively prevent the screw from rotating in the opposite direction due to the action of external force, and the use safety is higher.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0015] Figure 1 This is a schematic diagram of the overall structure of a reversible self-locking ball screw device of the utility model;

[0016] Figure 2 It is a partial structural schematic diagram of a reversible self-locking ball screw device of the utility model;

[0017] Figure 3 The utility model is a reversible self-locking ball screw device Figure 2 The enlarged structural diagram at A in the middle;

[0018] Figure 4 The utility model is a schematic diagram of the internal cross-sectional structure of a mounting plate of a reversible self-locking ball screw device.

[0019] Legend:

[0020] 1. Screw; 2. Nut; 3. Connecting shaft; 4. Mounting plate; 5. Fixed plate; 6. Through hole; 7. Articulated shaft; 8. Movable plate; 9. Raised portion; 10. Baffle; 11. Cushion; 12. First magnet; 13. Second magnet. DETAILED DESCRIPTION

[0021] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0022] Reference Figure 1-4 The utility model embodiment is a reversible self-locking ball screw device, which includes a screw rod 1 and a nut 2 threadedly connected to the outside of the screw rod 1, both ends of the screw rod 1 are fixedly connected with a connecting shaft 3, one end of the connecting shaft 3 opposite to the screw rod 1 is provided with a mounting plate 4, the connecting shaft 3 is rotatably connected to the mounting plate 4, the bottom of the inner wall of the mounting plate 4 is fixedly connected with a baffle 10, the outside of the connecting shaft 3 and the inside of the mounting plate 4 are rotatably connected with a plurality of movable plates 8 through a hinged rotating shaft 7, and the bottoms of the plurality of movable plates 8 can all contact with the outside of the mounting plate 4;

[0023] When the nut 2, the screw rod 1 and the connecting shaft 3 directly reverse the transmission, the connecting shaft 3 rotates to drive the movable plate 8 to rotate in the reverse direction, so that the side of the movable plate 8 close to the hinge shaft 7 moves toward the side of the baffle 10, and the baffle 10 contacts the movable plate 8, so that the movable plate 8 reversely rotates around the hinge shaft 7 as the center, and under the action of the connecting shaft 3, the rotating movable plate 8 can be limited to prevent the movable plate 8 from moving to the other side of the baffle 10 after continuous rotation, thereby preventing the problem of reverse transmission. The structure is simple, and the screw rod 1 can be well prevented from rotating in the opposite direction due to the action of external force, and the use safety is higher.

[0024] A first magnet 12 is embedded inside the mounting plate 4, and a second magnet 13 is embedded at one end of several movable plates 8 close to the first magnet 12. The first magnet 12 and the second magnet 13 are arranged to be attracted to each other, which helps to ensure that the movable plates 8 are in a corresponding horizontal state to prevent the movable plates 8 from colliding with the rotation of the connecting shaft 3 and causing a loud noise.

[0025] Several movable plates 8 are fixedly connected with protrusions 9 on one side close to the connecting shaft 3 and opposite to the hinge shaft 7. When the movable plate 8 rotates in the opposite direction, the protrusion 9 can be rotated toward the connecting shaft 3 under the action of the baffle 10, so that the distance between the top of the movable plate 8 and the connecting shaft 3 can be reduced under the action of the protrusion 9 to better position the connecting shaft 3. The rotation direction of the screw rod 1 is that the hinge shaft 7 rotates toward the side of the adjacent protrusion 9. The screw rod 1 keeps rotating in this direction to better realize the free rotation operation of the movable plate 8 through the baffle 10, as well as the limiting effect of the baffle 10 on the movable plate 8 during reverse rotation.

[0026] A fixing plate 5 is fixedly connected to the outer side of the mounting plate 4, the connecting shaft 3 is rotatably connected to the fixing plate 5, and a plurality of through holes 6 are evenly opened inside the fixing plate 5. The through holes 6 can be used in conjunction with external bolts to mount the fixing plate 5 on the mounting surface to ensure the stability of the mounting plate 4. Soft pads 11 are fixedly connected to both sides of the baffle 10, and the noise and wear generated by the contact between the movable plate 8 and the baffle 10 can be reduced under the action of the soft pads 11.

[0027] When the nut 2, the screw rod 1 and the connecting shaft 3 are directly reversed, the rotation of the connecting shaft 3 drives the movable plate 8 to rotate in the reverse direction, so that the side of the movable plate 8 close to the hinge shaft 7 moves toward the side of the baffle 10, and the baffle 10 contacts the movable plate 8, so that the movable plate 8 rotates in the reverse direction with the hinge shaft 7 as the center, and the rotating movable plate 8 can be limited under the action of the connecting shaft 3 to prevent the movable plate 8 from moving to the other side of the baffle 10 after continuous rotation, thereby preventing the problem of reverse transmission. The structure is simple, and the screw rod 1 can be well prevented from rotating in the opposite direction due to the action of external force, and the use safety is higher.

[0028] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A reversible self-locking ball screw device, characterized in that: The invention comprises a screw rod (1) and a nut (2) threadedly connected to the outer side of the screw rod (1), wherein both ends of the screw rod (1) are fixedly connected to a connecting shaft (3), wherein an end of one of the connecting shafts (3) opposite to the screw rod (1) is provided with a mounting plate (4), wherein the connecting shaft (3) is rotatably connected to the mounting plate (4), a baffle plate (10) is fixedly connected to the bottom of the inner wall of the mounting plate (4), and a plurality of movable plates (8) are rotatably connected to the outer side of the connecting shaft (3) and located on the inner side of the mounting plate (4) via a hinged rotating shaft (7), and the bottoms of the plurality of movable plates (8) can all contact the outer side of the mounting plate (4).

2. A reversible self-locking ball screw device according to claim 1, characterized in that: A first magnet (12) is embedded inside the mounting plate (4), and a second magnet (13) is embedded at one end of a plurality of movable plates (8) close to the first magnet (12).

3. A reversible self-locking ball screw device according to claim 2, characterized in that: A plurality of movable plates (8) are fixedly connected with a protrusion (9) on one side close to the connecting shaft (3) and opposite to the hinged rotating shaft (7).

4. A reversible self-locking ball screw device according to claim 3, characterized in that: Soft pads (11) are fixedly connected to both sides of the baffle (10).

5. A reversible self-locking ball screw device according to claim 4, characterized in that: A fixing plate (5) is fixedly connected to the outer side of the mounting plate (4), the connecting shaft (3) is rotatably connected to the fixing plate (5), and a plurality of through holes (6) are evenly arranged inside the fixing plate (5).

6. A reversible self-locking ball screw device according to claim 1, characterized in that: The rotation direction of the screw rod (1) is that the hinge shaft (7) rotates toward the side of the adjacent protrusion (9).

Images