Double-nut ball screw assembly

Abstract

The utility model discloses a double-nut ball screw pair which comprises a ball screw, two ball screw pairs are rotatably connected to the outside of the ball screw, mounting seats are fixedly connected to the tops of the two ball screw pairs, and a turntable is fixedly connected to the left end of the ball screw. During use, the ball screw pair can move left and right along the external thread of the ball screw, and when the ball screw pair rotates along the external thread of the ball screw, the drainage ball can be in contact friction along the thread groove outside the ball screw, so that the drainage ball can rotate in the oil outlet pipe; according to the grease coating device for the ball screw pair, grease in the collecting bottle flows out of the grease outlet pipe, the grease can coat an external thread groove of the ball screw, the grease coating effect is achieved, and in the daily use process, the sound insulation and noise reduction effects can be achieved when the ball screw pair rotates along the exterior of the ball screw through the combination of the sound insulation plate and the mute cotton.

Description

Technical Field

[0001] This utility model relates to the technical field of double-nut ball screw pairs, specifically double-nut ball screw pairs. Background Technology

[0002] Currently, precision ball screw and nut drives, in addition to requiring a certain unidirectional feed accuracy, also require strict control of the axial clearance between the nut and the screw. Otherwise, when the screw rotates in the reverse direction, a backlash error will occur. To eliminate the backlash error caused by the axial clearance between the nut and the screw, ball screw and nut drives generally employ double-nut preload to eliminate backlash.

[0003] A double-nut ball screw assembly, disclosed in publication number CN211574192U, includes a screw, a main nut and a secondary nut connected in series on the screw; a keyway is formed on the outer circumferential surface of the main nut facing the secondary nut and along the axial direction of the main nut, and a load-bearing key is embedded in the keyway; a sleeve integrally formed with the secondary nut is provided on the side of the secondary nut facing the main nut, the sleeve having a circular hole coaxial with the secondary nut, and an arc-shaped hole is formed on the sleeve; the sleeve is fitted on the end of the main nut facing the secondary nut, and the load-bearing key protrudes from the keyway away from the screw and is embedded in the arc-shaped hole, and the load-bearing key is adapted to move in the arc-shaped hole along the circumference of the sleeve; a preload plate is also embedded in the arc-shaped hole; an annular preload clamp is arranged around the sleeve, and the preload clamp abuts against the preload plate. This invention can eliminate the axial clearance newly generated by wear in the screw, main nut, and auxiliary nut of a double-nut ball screw assembly, and the preload force of the main nut and auxiliary nut is easy to adjust. However, the above-mentioned double-nut ball screw assembly has a relatively simple structure and does not have an automatic oiling structure, which requires manual oiling during maintenance, which is cumbersome and laborious. Therefore, it is necessary to provide a new double-nut ball screw assembly to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this invention is to provide a double-nut ball screw assembly with the advantages of automatic lubrication, quiet operation, and improved practicality, thus solving the problems in the background technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a double-nut ball screw assembly, comprising: a ball screw, to which two ball screw assemblies are rotatably connected, each ball screw assembly having a mounting base fixedly connected to its top, and a turntable fixedly connected to the left end of the ball screw; an auxiliary assembly, comprising two collection bottles, each collection bottle being respectively secured to the top of one of the two mounting bases; and a noise reduction assembly, comprising a cavity formed inside the ball screw assembly, wherein during use, the ball screw... The ball screw assembly can move left and right along the external thread of the ball screw. When the ball screw assembly rotates along the external thread of the ball screw, the guide ball will contact and rub along the thread groove of the external ball screw, causing the guide ball to rotate inside the oil outlet pipe. This causes the grease inside the collection bottle to flow out from the oil outlet pipe, allowing the grease to coat the external thread groove of the ball screw, achieving the effect of oiling. In daily use, the combination of sound insulation board and sound-absorbing cotton can achieve the effect of sound insulation and noise reduction when the ball screw assembly rotates along the external thread of the ball screw.

[0006] Preferably, the auxiliary component further includes an oil outlet pipe, which is fixedly connected to the outside of the collection bottle. A guide bead is installed inside the oil outlet pipe. When the synchronous ball screw pair of the collection bottle rotates along the outside of the ball screw, the guide bead will roll along the thread groove on the outside of the ball screw. When the guide bead rolls, the grease inside the collection bottle flows out from the oil outlet pipe, so that the grease can be applied to the thread groove on the outside of the ball screw.

[0007] Preferably, each of the two collection bottles is fixedly connected to an injection port at its top, and a bottle stopper is fitted inside the injection port, so that butter can be easily injected into the collection bottle.

[0008] Preferably, both collection bottles are provided with a viewing window on the outside, which allows for easy observation of the current amount of butter inside the collection bottle, facilitating timely replenishment.

[0009] Preferably, each of the two mounting bases has a slot at its top, and a block is inserted inside the slot. The two blocks are fixedly connected to the bottom of the two collection bottles respectively. The slots and blocks are used together to facilitate the assembly and disassembly of the collection bottles.

[0010] Preferably, the noise reduction component further includes two sound insulation plates, which are respectively fixedly connected to the inside of the two cavities. The sound insulation plates can reduce the noise when the ball screw pair rotates.

[0011] Preferably, sound-absorbing cotton is fixedly connected to the outside of both sound insulation panels. The sound-absorbing cotton is fixedly connected to the inside of the cavity, and the sound-absorbing cotton, together with the sound insulation panels, achieves the effect of sound insulation and noise reduction.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] I. When this utility model is in use, the ball screw assembly can move left and right along the external thread of the ball screw. When the ball screw assembly rotates along the external thread of the ball screw, the guide ball will contact and rub along the thread groove of the external ball screw, causing the guide ball to rotate inside the oil outlet pipe, causing the grease inside the collection bottle to flow out from the oil outlet pipe, so that the grease can be applied to the external thread groove of the ball screw to achieve the effect of oiling.

[0014] II. In daily use, this utility model, through the combination of sound insulation board and sound-absorbing cotton, can achieve the effect of sound insulation and noise reduction when the ball screw pair rotates along the outside of the ball screw. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the external structure of the double-nut ball screw assembly of this utility model;

[0016] Figure 2 This is a schematic diagram of the disassembly structure of the collection bottle of the double-nut ball screw pair of this utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the collection bottle of the double-nut ball screw pair of this utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the ball screw assembly of the double nut ball screw assembly of this utility model.

[0019] In the diagram: 1. Ball screw; 2. Ball screw pair; 3. Mounting base; 4. Collection bottle; 5. Turntable; 6. Slot; 7. Block; 8. Viewing window; 9. Oil outlet pipe; 10. Drainage bead; 11. Injection port; 12. Bottle stopper; 13. Cavity; 14. Sound-absorbing cotton; 15. Sound insulation board. Detailed Implementation

[0020] 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.

[0021] Please see Figures 1 to 4This utility model provides a technical solution: a double-nut ball screw assembly, comprising: a ball screw 1, with two ball screw assemblies 2 rotatably connected to the outside of the ball screw 1, each ball screw assembly 2 having a mounting base 3 fixedly connected to its top, and a turntable 5 fixedly connected to the left end of the ball screw 1; an auxiliary assembly, comprising two collection bottles 4, each collection bottle 4 being respectively secured to the top of the two mounting bases 3; and a noise reduction assembly, which further comprises a cavity 13, the cavity 13 being formed inside the ball screw assembly 2, allowing the ball screw assembly 2 to move along the ball screw 1 during use. When the external thread moves left and right, the ball screw assembly 2 rotates along the external thread of the ball screw 1, and the guide bead 10 contacts and rubs along the external thread groove of the ball screw 1, causing the guide bead 10 to rotate inside the oil outlet pipe 9. This causes the grease inside the collection bottle 4 to flow out from the oil outlet pipe 9, allowing the grease to coat the external thread groove of the ball screw 1, thus achieving the effect of oiling. In daily use, the combination of the sound insulation plate 15 and the sound-absorbing cotton 14 can achieve the effect of sound insulation and noise reduction when the ball screw assembly 2 rotates along the outside of the ball screw 1.

[0022] The auxiliary components also include an oil outlet pipe 9, which is fixedly connected to the outside of the collection bottle 4. A guide bead 10 is installed inside the oil outlet pipe 9. When the collection bottle 4 rotates synchronously with the ball screw assembly 2 along the outside of the ball screw 1, the guide bead 10 will roll along the thread groove on the outside of the ball screw 1. When the guide bead 10 rolls, the grease inside the collection bottle 4 flows out from the oil outlet pipe 9, so that the grease can be applied to the thread groove on the outside of the ball screw 1.

[0023] Both collection bottles 4 are fixedly connected to the top of the injection port 11, and the injection port 11 is fitted with a bottle stopper 12. The injection port 11 can easily inject grease into the inside of the collection bottle 4.

[0024] Both collection bottles 4 have a viewing window 8 on the outside, which allows for easy observation of the current amount of grease inside the collection bottle 4, and facilitates timely replenishment.

[0025] Both mounting bases 3 have slots 6 on their tops, and slot blocks 7 are fitted inside the slots 6. The two slot blocks 7 are fixedly connected to the bottoms of the two collection bottles 4 respectively. The slots 6 and slot blocks 7 are used together to facilitate the assembly and disassembly of the collection bottles 4.

[0026] When the double nut ball screw assembly is in use, when the ball screw assembly 2 rotates along the external thread of the ball screw 1, the guide ball 10 will contact and rub along the external thread groove of the ball screw 1, causing the guide ball 10 to rotate inside the oil outlet pipe 9, so that the grease inside the collection bottle 4 flows out from the oil outlet pipe 9.

[0027] Please see Figures 1 to 4This utility model provides a technical solution: a double-nut ball screw assembly, and the noise reduction component also includes two sound insulation plates 15. The two sound insulation plates 15 are respectively fixedly connected to the inside of two cavities 13. The sound insulation plates 15 can reduce the noise when the ball screw assembly 2 rotates.

[0028] Both sound insulation panels 15 are fixedly connected to the outside of sound insulation cotton 14. The sound insulation cotton 14 is fixedly connected to the inside of the cavity 13. The sound insulation cotton 14, together with the sound insulation panels 15, achieves the effect of sound insulation and noise reduction.

[0029] When this double-nut ball screw assembly is in use, the combination of the sound insulation plate 15 and the sound-absorbing cotton 14 can achieve the effect of sound insulation and noise reduction when the ball screw assembly 2 rotates along the outside of the ball screw 1.

[0030] The standard parts used in this embodiment can be purchased directly from the market, while the non-standard structural parts described in the specification and drawings can be processed without any doubt based on existing technical common sense. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0031] 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 double-nut ball screw assembly, characterized in that, include: A ball screw (1) is externally rotatably connected to two ball screw pairs (2), and the top of each of the two ball screw pairs (2) is fixedly connected to a mounting seat (3). A turntable (5) is fixedly connected to the left end of the ball screw (1). An auxiliary component, comprising two collection bottles (4), which are respectively secured to the top of two mounting bases (3); The noise reduction component further includes a cavity (13) which is located inside the ball screw pair (2).

2. The double-nut ball screw assembly according to claim 1, characterized in that: The auxiliary component also includes an oil outlet pipe (9), which is fixedly connected to the outside of the collection bottle (4), and a drainage bead (10) is installed inside the oil outlet pipe (9).

3. The double-nut ball screw assembly according to claim 1, characterized in that: Both collection bottles (4) are fixedly connected to the top of the injection port (11), and the injection port (11) is fitted with a bottle stopper (12).

4. The double-nut ball screw assembly according to claim 1, characterized in that: Both collection bottles (4) have a viewing window (8) on their exterior.

5. The double-nut ball screw assembly according to claim 1, characterized in that: Both mounting bases (3) have a slot (6) on their tops, and a block (7) is inserted inside the slot (6).

6. The double-nut ball screw assembly according to claim 1, characterized in that: The noise reduction assembly also includes two sound insulation panels (15), which are fixedly connected to the interiors of the two cavities (13).

7. The double-nut ball screw assembly according to claim 6, characterized in that: Both of the sound insulation panels (15) are fixedly connected to the outside of sound-absorbing cotton (14), and the sound-absorbing cotton (14) is fixedly connected to the inside of the cavity (13).

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