High-precision mute ball screw pair

Abstract

The utility model relates to the technical field of ball screw pairs, in particular to a high-precision mute ball screw pair, which comprises a screw rod and is characterized in that a screw groove is arranged on the screw rod, a screw sleeve is sleeved on the screw rod, a thread groove is arranged in the screw sleeve, a ball is embedded in the thread groove in a rolling manner, the ball is also embedded with the screw groove in a rolling manner, and the screw rod and the screw sleeve are connected with the screw rod in a sleeving manner. An oil injection opening is formed in the outer surface of the screw sleeve, one side of the oil injection opening is further communicated with an oil pushing opening formed in the outer side of the screw sleeve, and an oil pushing plug is arranged in the oil pushing opening. Lubricating oil is injected into the oil injection port, the lubricating oil can enter the threaded groove along the oil storage groove, the lubricating oil is directly injected into the screw sleeve, the ball circulates in the screw sleeve through the phase inverter, the lubricating oil can be smeared in the screw sleeve, operation is easy, fast and very convenient, the ball runs more silently, and the lubricating oil smearing device has very high practical value.

Description

Technical Field

[0001] The utility model relates to the technical field of ball screw pairs, in particular to a high-precision silent ball screw pair. Background Art

[0002] Ball screw pair is also called ball screw pair or ball screw pair. It is composed of two sets of screw and nut. It is the most accurate and most commonly used transmission device in transmission machinery.

[0003] A Chinese patent with publication number CN211599441U is searched and discloses a high-precision ball screw pair including a nut sleeve.

[0004] The above technical scheme includes: a nut sleeve, a threaded rod, a threaded rod is provided on the high-precision ball screw pair, a nut sleeve is provided on the outside of the threaded rod, protrusions are provided on the outside of both ends of the nut sleeve, two ball outlet holes are provided on the outer wall of the nut sleeve, a ball circulation groove is provided between the two ball outlet holes, the ball circulation groove is connected with the ball outlet holes, a threaded rod mounting groove is provided inside the nut sleeve, a threaded groove is provided on the inner wall of the threaded rod mounting groove, balls are provided inside the threaded groove, auxiliary ball grooves are provided at the ports at both ends of the threaded rod mounting groove, small balls are provided inside the auxiliary ball grooves, and limiting balls are provided on the inner side of the auxiliary ball grooves, the stability of the ball screw is improved by the limiting balls, thereby improving the accuracy of the ball screw, the device has reasonable design, simple structure, good stability of the ball screw, and high accuracy of the ball screw;

[0005] However, in the above scheme, in order to reduce the friction of the ball when the ball screw is in use, lubricating oil is usually applied to the screw. This method is time-consuming and labor-intensive, and the inside of the thread sleeve cannot be applied. The lubricating oil can only be contaminated into the thread sleeve by the ball, and the effect is poor. After long-term use, iron filings and the like will enter the screw, increasing the wear of the ball and reducing the service life.

[0006] To this end, we propose a high-precision silent ball screw pair. Utility Model Content

[0007] The utility model mainly solves the technical problems existing in the above-mentioned prior art and provides a high-precision silent ball screw pair.

[0008] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme, a high-precision silent ball screw pair, including a screw, characterized in that: a wire groove is opened on the screw, a wire sleeve is connected on the screw, a thread groove is opened in the wire sleeve, a ball is rollingly embedded in the thread groove, the ball is also rollingly embedded in the wire groove, an oil filling port is arranged on the outer surface of the wire sleeve, and one side of the oil filling port is also connected to an oil push port which is also arranged on the outside of the wire sleeve, and an oil push plug is arranged in the oil push port.

[0009] Preferably, the oil filling port and the oil pushing port are both connected to an oil storage tank, the oil storage tank is arranged in the thread sleeve, the oil storage tank is connected to an oil outlet tank, and the oil outlet tank is connected to a thread groove.

[0010] Preferably, a one-way valve is provided inside the oil filling port, and the oil push port is slidably sealed with the oil push plug.

[0011] Preferably, an inverter is sleeved inside the silk sleeve, and the ball is rollingly connected inside the inverter.

[0012] Preferably, both ends of the wire sleeve are fixedly connected with symmetrically arranged cleaning rings, the cleaning rings include mounting rings, a cleaning strip is fixedly connected inside the mounting ring, and the cleaning strip is threadedly arranged and interlocked with the wire groove.

[0013] Preferably, an ash groove is provided at the connection between the cleaning strip and the cleaning ring at one end away from the silk sleeve.

[0014] The utility model provides a high-precision silent ball screw pair, which has the following improvements and advantages compared with the prior art:

[0015] (1) The utility model adopts an oil filling port connected to an oil pushing port, a screw rod is provided with a thread groove, a thread sleeve is sleeved on the screw rod, a thread groove is provided in the thread sleeve, a ball is rolled and embedded in the thread groove, and the ball is also rolled and embedded in the thread groove, an oil filling port is provided on the outer surface of the thread sleeve, one side of the oil filling port is also connected to an oil pushing port which is also arranged on the outer side of the thread sleeve, an oil pushing plug is arranged in the oil pushing port, the oil filling port and the oil pushing port are both connected to an oil storage tank, the oil storage tank is provided in the thread sleeve, the oil storage tank is connected to an oil outlet tank, the oil outlet tank is connected to the thread groove, a one-way valve is sleeved in the oil filling port, the oil pushing port and the oil pushing plug are slidably sealed, and the thread sleeve is also provided with a one-way valve. An inverter is connected to the sleeve, and the ball is connected in a rolling manner in the inverter. By injecting lubricating oil into the oil filling port, the lubricating oil will enter the threaded groove along the oil storage groove, and the lubricating oil is directly injected into the thread sleeve. The ball circulates in the thread sleeve through the inverter to apply the lubricating oil to the thread sleeve. The operation is simple and fast, and very convenient. An oil push plug is provided. After the lubricating oil has applied the inside of the thread sleeve, the lubricating oil continues to be added to fill the oil push port. When the lubricating oil needs to be added next time, the oil push plug is directly pushed to squeeze the lubricating oil out of the oil storage tank, so that the ball operation is quieter, which is very practical.

[0016] (2) The utility model adopts a cleaning ring fixedly connected to both ends of the thread sleeve, and the cleaning ring includes a mounting ring, a cleaning strip fixedly connected inside the mounting ring, the cleaning strip is threaded and interlocked with the thread groove, and an ash groove is provided at the connection between the cleaning strip and the cleaning ring at one end away from the thread sleeve. The cleaning ring is used to remove impurities such as iron filings in the thread groove, thereby avoiding wear of the ball bearing and extending the service life. The utility model is suitable for high-precision operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0018] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a structural plane schematic diagram of the thread sleeve in the utility model;

[0020] Figure 3 It is a schematic diagram of the structure of the cleaning ring in the utility model.

[0021] Legend:

[0022] 10. Screw rod; 11. Thread groove; 20. Thread sleeve; 23. Thread groove; 24. Ball; 26. Oil filling port; 27. Oil push port; 28. One-way valve; 29. ​​Oil push plug; 30. Oil storage tank; 31. Oil outlet tank; 32. Inverter; 40. Cleaning ring; 41. Mounting ring; 42. Cleaning strip; 43. Ash trough. DETAILED DESCRIPTION

[0023] The invention is further described below in conjunction with the accompanying drawings and specific implementation methods:

[0024] See also Figure 1 to Figure 2Embodiment 1 is described, including a screw rod 10, a screw rod 10 is provided with a screw groove 11, the screw groove 11 is in a threaded shape, a screw sleeve 20 is sleeved on the screw rod 10, a screw sleeve 20 is provided with a thread groove 23, the thread groove 23 is used to engage a ball 24, a ball 24 is rollingly embedded in the thread groove 23, the ball 24 is also rollingly engaged with the screw groove 11, and moves through the rotational motion of the ball 24, an oil filling port 26 is provided on the outer surface of the screw sleeve 20, the oil filling port 26 is used to add lubricating oil, and one side of the oil filling port 26 is also connected to an oil push port 27 which is also provided on the outer side of the screw sleeve 20, the oil push port 27 is used to store lubricating oil, and an oil push plug 29 is provided in the oil push port 27, the oil push plug 29 pushes the lubricating oil out, and the oil filling port 26 and the oil push plug 29 are connected. The ports 27 are all connected to the oil storage tank 30. Lubricating oil is added from the oil filling port 26 and can also flow to the oil pushing port 27. The oil storage tank 30 is set in the thread sleeve 20. The oil storage tank 30 is connected with the oil outlet groove 31. The oil outlet groove 31 is connected with the thread groove 23. The lubricating oil enters the thread groove 23 from the oil storage tank 30 and contacts the ball 24. A one-way valve 28 is sleeved in the oil filling port 26 to prevent the lubricating oil from flowing out of the oil filling port 26. The oil pushing port 27 is slidably sealed with the oil pushing plug 29 to prevent the lubricating oil from leaking and can also push the lubricating oil out. An inverter 32 is also sleeved in the thread sleeve 20. The ball 24 is rollingly connected in the inverter 32. The function of the inverter 32 is to allow the ball 24 to circulate in the thread sleeve 20 to convert the linear motion into the rotary motion.

[0025] In this embodiment, lubricating oil is injected from the oil filling port 26, and the lubricating oil flows into the oil storage tank 30 through the one-way valve 28. After filling the oil storage tank 30, the lubricating oil will enter the threaded groove 23 from the oil outlet groove 31 and contact the ball 24. Slightly rotate the screw rod 10 or the thread sleeve 20 to allow the ball 24 to circulate in the thread sleeve 20, thereby injecting lubricating oil into the entire thread sleeve 20, and the contact friction between the ball 24 and the thread groove 11 is reduced. When refueling is needed, press the oil push plug 29, and the oil push plug 29 squeezes out the lubricating oil in the oil push port 27. The oil filling port 26 is blocked by the reverse valve, and the lubricating oil enters the threaded groove 23 from the oil outlet groove 31. The operation is simple, fast and very convenient.

[0026] Example 2

[0027] See also Figure 1 and Figure 3 Embodiment 2 is described, including cleaning rings 40 symmetrically arranged fixedly connected at both ends of the wire sleeve 20, which can clean the wire sleeve 20 in both forward and backward moving directions, the cleaning ring 40 includes a mounting ring 41, the mounting ring 41 plays a supporting role, a cleaning strip 42 is fixedly connected inside the mounting ring 41, the cleaning strip 42 is threadedly arranged and interlocked with the wire groove 11, the cleaning strip 42 can push away the iron filings in the wire groove 11, and an ash groove 43 is provided at the connection between the cleaning strip 42 and the end of the cleaning ring 40 away from the wire sleeve 20, the function of the ash groove 43 is that the cleaning strip 42 pushes out the iron filings and discharges them along the ash groove 43;

[0028] In this embodiment, when the screw rod 10 rotates, the wire sleeve 20 moves, driving the mounting ring 41 to move, and the wire groove 11 engages with the cleaning strip 42. The cleaning strip 42 can squeeze out impurities such as iron filings in the wire groove 11. The iron filings are collected in the ash groove 43 and discharged as the wire sleeve 20 moves, which can reduce abnormal wear of the ball 24 and extend its service life.

Claims

1. A high-precision silent ball screw pair, comprising a screw (10), characterized in that: The screw rod (10) is provided with a screw groove (11), the screw rod (10) is sleeved with a screw sleeve (20), a thread groove (23) is provided in the screw sleeve (20), a ball (24) is rollingly embedded in the thread groove (23), and the ball (24) is also rollingly embedded in the screw groove (11), an oil filling port (26) is provided on the outer surface of the screw sleeve (20), one side of the oil filling port (26) is also connected to an oil push port (27) also provided on the outer side of the screw sleeve (20), and an oil push plug (29) is provided in the oil push port (27).

2. A high-precision silent ball screw pair according to claim 1, characterized in that: The oil filling port (26) and the oil pushing port (27) are both connected to an oil storage tank (30), the oil storage tank (30) is arranged in the thread sleeve (20), the oil storage tank (30) is connected to an oil outlet tank (31), and the oil outlet tank (31) is connected to the thread groove (23).

3. The high-precision silent ball screw pair according to claim 1 is characterized in that: The oil filling port (26) is sleeved with a one-way valve (28), and the oil pushing port (27) and the oil pushing plug (29) are slidably sealed.

4. The high-precision silent ball screw pair according to claim 1 is characterized in that: An inverter (32) is also sleeved in the wire sleeve (20), and the ball (24) is rollingly connected in the inverter (32).

5. The high-precision silent ball screw pair according to claim 1 is characterized in that: The two ends of the wire sleeve (20) are also fixedly connected to symmetrically arranged cleaning rings (40), the cleaning ring (40) comprising a mounting ring (41), a cleaning strip (42) being fixedly connected inside the mounting ring (41), the cleaning strip (42) being threadedly arranged and interlocked with the wire groove (11).

6. The high-precision silent ball screw pair according to claim 5, characterized in that: An ash groove (43) is provided at the connection between the cleaning strip (42) and the cleaning ring (40) at one end away from the silk sleeve (20).

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