A new type of planetary roller screw for robots

Abstract

The utility model discloses a novel robot is with planetary roller screw relates roller screw technical field, it is characterized by, including: main screw; Screw nut, fixedly connected symmetrical gear ring, a group of roller screws are set between main screw with screw nut, realize drive, and the both ends of each roller screw are fixedly connected gear respectively, and each gear is engaged corresponding screw nut respectively, symmetrical guide plate is provided with installation groove respectively to a group of roller screws, and each roller screw is installed on the guide plate. The utility model discloses a novel robot is with planetary roller screw, through adopting carbon fiber composite material roller screw and carrying out nanometer hard alloy coating on the surface of main screw, to improve the service life of equipment, at the same time, realize the sealing of screw nut part.

Description

Technical Field

[0001] This utility model relates to the field of ball screw technology, and more specifically, to a novel planetary ball screw for robots. Background Technology

[0002] Planetary roller screws are precision rolling helical transmission mechanisms that convert rotary motion into linear motion. However, the alloy materials used in existing planetary roller screws are prone to wear, affecting the accuracy of robot movements and resulting in a short service life.

[0003] Currently, there is a lack of a new type of planetary roller screw for robots. By using carbon fiber composite roller screws and applying a nano-hard alloy coating to the surface of the main screw, the service life of the equipment can be improved, while at the same time, the screw nut part can be sealed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a novel planetary roller screw for robots. By using a carbon fiber composite roller screw and applying a nano-hard alloy coating to the surface of the main screw, the service life of the equipment can be improved, and at the same time, the screw nut part can be sealed.

[0005] This utility model achieves its purpose through the following technical solution:

[0006] A novel planetary roller screw for robots, characterized by comprising: a main screw, typically a multi-start threaded shaft, connected to the output end of a motor or reducer to provide rotational power; a screw nut, coaxially arranged with the main screw, having a multi-start internal thread, which can be used for both fixing and linear motion output; symmetrically fixed gear rings that mesh with gears to ensure synchronous rotation of all roller screws and prevent slippage; a set of roller screws, each with a single-start thread, which rotates on its own axis and revolves around the axis of the main screw, forming planetary motion, thereby converting the rotational motion of the main screw into the linear displacement of the screw nut; a transmission mechanism positioned between the main screw and the screw nut, with gears fixedly connected to both ends of each roller screw, each gear meshing with the corresponding screw nut; and symmetrical guide plates, each with mounting grooves corresponding to a set of roller screws, with each roller screw mounted on the guide plates, the roller screws evenly distributed in the circumferential direction and their spacing maintained.

[0007] As a further limitation of this technical solution, the lead screw nut is provided with symmetrical slots, and retaining rings are respectively provided in the symmetrical slots to realize the axial positioning of the guide plate, effectively prevent the guide plate from moving in the axial direction, and enhance the stability of the structure.

[0008] As a further limitation of this technical solution, the retaining ring is fixedly connected to at least two perforated plates at the notch. By using a tool to clamp the perforated plates, the retaining ring undergoes elastic deformation, facilitating its installation and removal.

[0009] As a further limitation of this technical solution, end caps are fixedly connected to both ends of the lead screw nut. Impurities or residues on the lead screw nut are cleaned to ensure its normal operation.

[0010] As a further limitation of this technical solution, the end cap is made of wear-resistant material, which can effectively resist wear during long-term operation and extend its service life.

[0011] As a further limitation of this technical solution, symmetrical sealing grooves are provided at both ends of the lead screw nut, and symmetrical end caps are provided with positioning steps. Two sealing rings are respectively installed in the areas formed by the corresponding positioning steps and sealing grooves. The sealing rings are made of elastic material, have good sealing performance, and can effectively prevent external impurities from entering the interior of the lead screw nut.

[0012] As a further limitation of this technical solution, each of the symmetrical end caps is provided with a spring groove, and each of the symmetrical spring grooves is provided with a disc spring and a pressure ring. Each of the symmetrical disc springs is fixedly connected to a corresponding pressure ring, and each of the symmetrical disc springs contacts a corresponding end cap. Each of the symmetrical pressure rings contacts a corresponding sealing ring. The disc springs provide continuous elastic pressure, ensuring tight contact between the sealing ring and the end cap and the lead screw nut, further enhancing the sealing effect. The pressure rings, as supports for the disc springs, effectively disperse the pressure generated by the disc springs, preventing excessive local pressure from damaging the sealing rings.

[0013] As a further limitation of this technical solution, the end cap is fixedly connected to a set of positioning round blocks, and the set of positioning round blocks respectively match the round holes on the perforated plate.

[0014] As a further limitation of this technical solution, the ball screw is made of carbon fiber composite material, and the surface of the main ball screw is coated with a nano-hard alloy coating.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are:

[0016] (1) The roller material of this utility model is improved by using carbon fiber composite material and a nano hard alloy coating is applied to the surface of the lead screw to reduce inertia and improve wear resistance. It is 30% lighter and its service life is doubled.

[0017] (2) This utility model uses a disc spring and a sealing ring to ensure tight contact between the sealing ring and the end cap and the lead screw nut, thereby further enhancing the sealing effect. The pressure ring, as a support for the disc spring, effectively disperses the pressure generated by the disc spring and avoids damage to the sealing ring due to excessive local pressure. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a partially cut-away three-dimensional structural diagram of the present invention.

[0020] Figure 3 For the localized explosion of this utility model Figure 1 .

[0021] Figure 4 For the localized explosion of this utility model Figure 2 .

[0022] Figure 5 This is a partial three-dimensional structural diagram of the present invention.

[0023] In the diagram: 1. Main lead screw, 2. Lead screw nut, 3. Gear, 4. Roller lead screw, 5. Gear ring, 6. Snap groove, 7. Sealing groove, 8. End cap, 9. Positioning step, 10. Spring groove, 11. Sealing ring, 12. Pressure ring, 13. Disc spring, 14. Snap ring, 15. Guide plate, 16. Perforated plate, 17. Mounting groove, 18. Positioning block. Detailed Implementation

[0024] The following describes a specific embodiment of the present invention in detail with reference to the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.

[0025] Example 1: This utility model includes: a main lead screw 1, typically a multi-start threaded shaft, connected to the output end of a motor or reducer to provide rotational power; a lead screw nut 2, coaxially arranged with the main lead screw 1, having a multi-start internal thread, which can be used for fixing or as a linear motion output end; a fixedly connected symmetrical gear ring 5, meshing with a gear 3 to ensure synchronous rotation of all roller lead screws 4 and prevent slippage; and a set of roller lead screws 4, each with a single-start thread, which rotates both around its own axis and around the axis of the main lead screw 1. The rotation forms planetary motion, thereby converting the rotational motion of the main lead screw 1 into the linear displacement of the lead screw nut 2; a transmission is achieved between the main lead screw 1 and the lead screw nut 2; each of the roller lead screws 4 has a gear 3 fixedly connected to both ends, and each gear 3 meshes with the corresponding lead screw nut 2; symmetrical guide plates 15 are provided with mounting grooves 17 corresponding to a group of roller lead screws 4, and each roller lead screw 4 is mounted on the guide plate 15, with the roller lead screws 4 evenly distributed in the circumferential direction and their spacing maintained.

[0026] The lead screw nut 2 is provided with symmetrical slots 6, and retaining rings 14 are respectively provided in the symmetrical slots 6 to realize the axial positioning of the guide plate 15, effectively prevent the guide plate 15 from moving in the axial direction, and enhance the stability of the structure.

[0027] The retaining ring 14 is fixedly connected to at least two perforated plates 16 at the notch. By using a tool to clamp the perforated plates 16, the retaining ring 14 undergoes elastic deformation, facilitating the installation and removal of the retaining ring 14.

[0028] The ball screw 4 is made of carbon fiber composite material, and the surface of the main screw 1 is coated with a nano-hard alloy.

[0029] Example 2: This example further elaborates on Example 1, wherein end caps 8 are fixedly connected to both ends of the lead screw nut 2. Impurities or residues on the lead screw nut 2 are cleaned to ensure its normal operation.

[0030] The end cap 8 is made of wear-resistant material, which can effectively resist wear during long-term operation and extend its service life.

[0031] The lead screw nut 2 has symmetrical sealing grooves 7 at both ends, and the symmetrical end caps 8 have positioning steps 9. Two sealing rings 11 are respectively installed in the areas formed by the corresponding positioning steps 9 and sealing grooves 7. The sealing rings 11 are made of elastic material and have good sealing performance, which can effectively prevent external impurities from entering the interior of the lead screw nut 2.

[0032] Example 3: This example further elaborates on Example 2. The symmetrical end caps 8 are each provided with a spring groove 10. A disc spring 13 and a pressure ring 12 are respectively disposed within each symmetrical spring groove 10. The symmetrical disc springs 13 are respectively fixedly connected to the corresponding pressure rings 12. The symmetrical disc springs 13 contact the corresponding end caps 8, and the symmetrical pressure rings 12 contact the corresponding sealing rings 11. The disc springs 13 provide continuous elastic pressure, ensuring tight contact between the sealing rings 11 and the end caps 8 and the lead screw nut 2, further enhancing the sealing effect. The pressure rings 12, acting as a support for the disc springs 13, effectively disperse the pressure generated by the disc springs 13, preventing excessive local pressure from damaging the sealing rings 11.

[0033] Example 4: This example is a further elaboration based on Example 2 or 3. The end cap 8 is fixedly connected to a set of positioning round blocks 18, and the set of positioning round blocks 18 respectively match the round holes on the perforated plate 16.

[0034] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A novel planetary roller screw for robots, characterized in that, include: Main screw (1); Screw nut (2), fixedly connected to symmetrical gear ring (5); A set of roller screws (4) is set between the main screw (1) and the screw nut (2) to realize transmission. Each roller screw (4) has a gear (3) fixedly connected to both ends, and each gear (3) meshes with the corresponding screw nut (2). The symmetrical guide plate (15) is provided with mounting grooves (17) corresponding to a set of roller screws (4), and each roller screw (4) is mounted on the guide plate (15).

2. The novel planetary roller screw for robots according to claim 1, characterized in that: The lead screw nut (2) is provided with symmetrical slots (6), and retaining rings (14) are respectively provided in the symmetrical slots (6).

3. A novel planetary roller screw for robots according to claim 2, characterized in that: The retaining ring (14) is fixedly connected to at least two perforated plates (16) at the notch.

4. A novel planetary roller screw for robots according to claim 3, characterized in that: The two ends of the lead screw nut (2) are respectively fixedly connected to end caps (8).

5. A novel planetary roller screw for robots according to claim 4, characterized in that: The two ends of the lead screw nut (2) are respectively provided with symmetrical sealing grooves (7), and the symmetrical end caps (8) are respectively provided with positioning steps (9). Two sealing rings (11) are respectively installed in the area formed by the corresponding positioning steps (9) and the sealing grooves (7).

6. A novel planetary roller screw for robots according to claim 5, characterized in that: The symmetrical end caps (8) are respectively provided with spring grooves (10), and disc springs (13) and pressure rings (12) are respectively provided in the symmetrical spring grooves (10). The symmetrical disc springs (13) are respectively fixedly connected to the corresponding pressure rings (12). The symmetrical disc springs (13) respectively contact the corresponding end caps (8), and the symmetrical pressure rings (12) respectively contact the corresponding sealing rings (11).

7. A novel planetary roller screw for robots according to claim 4, characterized in that: The end cap (8) is fixedly connected to a set of positioning blocks (18), and the set of positioning blocks (18) respectively match the corresponding holes on the perforated plate (16).

8. A novel planetary roller screw for robots according to claim 1, characterized in that: The roller screw (4) is made of carbon fiber composite material, and the surface of the main screw (1) is coated with a nano-hard alloy.

Images