Dustproof ball screw and ball screw assembly

Abstract

The dustproof ball screw comprises a screw body, one end of the screw body is fixedly connected with a fixing plate, a ball nut is rotationally installed on the surface of one end of the screw body, guide cylinders are arranged at the two ends of the ball nut, an annular groove is formed in one end of the outer surface of each guide cylinder, and the guide cylinders are arranged in the annular grooves. The outer surface of the guide cylinder is rotationally sleeved with a combined cylinder, the outer side of the guide cylinder is sleeved with the combined cylinder, one end of the combined cylinder is fixedly connected with a folding dustproof cylinder, one end of the folding dustproof cylinder is fixedly connected with an annular frame, and fixing holes are formed in the surface of the annular frame; the folding dustproof barrel is slidably connected to the outer surface of the lead screw body in a sleeving mode, a connecting screw is installed on the surface of one end of the combined barrel in a threaded mode, a connecting ball head is arranged at one end of the connecting screw, combined connection can be achieved, rotating avoiding can be achieved, torsional deformation is avoided, interference is avoided, adaptability is high, and installation and use are convenient.

Description

Technical Field

[0001] The utility model relates to the field of ball screws, and more specifically, to a dustproof ball screw and a ball screw assembly. Background Art

[0002] The ball screw is composed of a screw, a nut, a steel ball, a pre-loaded sheet, a reverser, and a dust collector. Traditionally, the screw has always been poorly positioned and easily damaged. The ball screw is the most commonly used transmission element in tool machinery and precision machinery. Its main function is to convert rotational motion into linear motion, or to convert torque into axial repeated force. At the same time, it has the characteristics of high precision, no leakage, no need for filtration, low friction loss, high transmission efficiency, high precision, high axial stiffness, reversibility and high efficiency. Due to its small friction resistance, the ball screw is widely used in various industrial equipment and precision instruments. However, since the use environment of the ball screw is mostly a high-chip and oily environment, if dirt falls on the raceway or dirty lubricating oil is used, it will not only hinder the normal operation of the ball, but also increase the wear sharply. Therefore, dust prevention of the ball screw is a top priority. However, since the ball screw is used in an environment with a lot of oil and dust, long-term use will cause the screw thread groove to be blocked, thereby affecting the service life of the ball screw.

[0003] The utility model with authorization announcement number CN210715799U relates to the field of screws, and specifically discloses a dustproof ball screw assembly, including a screw, a collar is installed on one side of the screw, an end cap is arranged on the inner side of the collar, a ball nut is installed between the sealing ring and the collar, and a dust cover is arranged at one end of the sealing ring, a mounting sleeve is arranged between the dust cover and the sealing ring, and a connecting bolt is installed on the outer side of the mounting sleeve. The dust cover can prevent dust, chips, hard sand and the like from entering, reduce the damage of hard granular foreign matter to the ball screw, and maintain the precision of the instrument. The dust cover is an accordion type, with the advantages of long stroke and small compression. After the mounting sleeve and the sealing ring are installed through the card slot, the first connecting hole and the second connecting hole are aligned and fixed, and after being fixed with the sealing ring, they can move together with the ball nut, thereby ensuring that the screw is not contaminated by dust and oil and does not affect the normal movement of the screw.

[0004] In the above-mentioned disclosed structure, dust is prevented by connecting the dust cover to the screw body, but there is a lack of a split combined structure for positioning, which is not conducive to combined installation and is prone to interference. Moreover, when the thread drives the ball nut, the dust cover is easily twisted and deformed, and the stability is poor, and the machine needs to be modified. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a dustproof ball screw and a ball screw assembly. The ball nut is installed through the screw body, and the combined cylinder is installed in combination with the guide cylinder to connect the folding dustproof cylinder. The two parts can be installed and positioned in combination to facilitate dust isolation. The connecting ball head is installed by connecting screws, which can be combined and connected, and can be rotated to avoid torsional deformation and interference. It has high adaptability and is easy to install and use.

[0006] To solve the above problems, the utility model adopts the following technical solutions.

[0007] A dustproof ball screw and ball screw assembly, comprising a screw body, one end of the screw body is fixedly connected to a fixing plate, one end surface of the screw body is rotatably mounted with a ball nut, both ends of the ball nut are provided with a guide cylinder, one end of the outer surface of the guide cylinder is provided with an annular groove, the outer surface of the guide cylinder is rotatably sleeved with a combination cylinder, the combination cylinder is sleeved on the outside of the guide cylinder, one end of the combination cylinder is fixedly connected to a folding dustproof cylinder, one end of the folding dustproof cylinder is fixedly connected to an annular frame, the surface of the annular frame is provided with a fixing hole, the folding dustproof cylinder is slidably sleeved on the outer surface of the screw body, one end surface of the combination cylinder is threadedly mounted with a connecting screw, one end of the connecting screw is provided with a connecting ball head, the connecting ball head is slidably connected to the inside of the annular groove, and the connecting screws are equiangularly distributed on the outer surface of the guide cylinder.

[0008] Furthermore, a support screw is threadedly installed on one end of the combination cylinder, and the support screw is located on one side of the screw rod body.

[0009] Furthermore, a rotating block is provided at one end of the supporting screw, and an arc plate is rotatably mounted on one side of the rotating block.

[0010] Furthermore, the arc plate is slidably connected to the outer surface of the screw body and is distributed at equal angles at one end of the screw body. The arc plate is installed by supporting screws, and the spacing can be adjusted by threads, which is conducive to fitting the screw body for guiding support and convenient adjustment and use.

[0011] Furthermore, a spherical groove is provided on the inner side of the arc plate, and a ball is rollingly connected inside the spherical groove.

[0012] Furthermore, the balls are rollingly connected to the outer surface of the screw body and are evenly distributed at equal angles.

[0013] Furthermore, the combined cylinder and the folding dustproof cylinder are symmetrically distributed at both ends of the screw body, and are connected by balls through spherical grooves, so they can be rollingly connected, which is convenient for support and guidance, avoids interference, and is also convenient for installation and use, thereby improving the accuracy and stability of adjustment.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] (1) This solution installs the ball nut through the screw body, and combines the guide tube to install the combination tube to connect the folding dustproof tube. It can be installed and positioned in a split combination, which is conducive to dust isolation. The connecting ball head is installed by connecting screws, which can be combined and connected, and can be rotated to avoid torsional deformation and interference. It has high adaptability and is easy to install and use.

[0016] (2) The arc plate is installed by supporting screws, and the spacing can be adjusted by threads, which is conducive to fitting the screw body for guide support and convenient adjustment.

[0017] (3) The ball bearings are connected through spherical grooves, which can be rolled together to facilitate support and guidance, avoid interference, and facilitate installation and use, thereby improving the accuracy and stability of adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 It is a schematic diagram of the planar structure of the utility model;

[0020] Figure 3 It is a cross-sectional view of the connection between the combined cylinder and the guide cylinder of the utility model;

[0021] Figure 4 For the utility model Figure 3 Enlarged view of point A of the middle ball connection.

[0022] Description of the numbers in the figure:

[0023] 1 screw body, 11 fixing plate, 12 ball nut, 13 guide cylinder, 14 annular groove, 15 combination cylinder, 16 folding dustproof cylinder, 17 annular frame, 18 fixing hole, 2 connecting screws, 21 connecting ball head, 22 supporting screws, 23 rotating block, 24 arc plate, 25 spherical groove, 26 ball. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0025] See also Figure 1 , Figure 2 and Figure 3A dustproof ball screw and a ball screw assembly, comprising a screw body 1, one end of the screw body 1 is fixedly connected with a fixing plate 11, one end surface of the screw body 1 is rotatably mounted with a ball nut 12, both ends of the ball nut 12 are provided with a guide cylinder 13, which can guide support, facilitate thread drive, and facilitate installation and use, one end of the outer surface of the guide cylinder 13 is provided with an annular groove 14, the outer surface of the guide cylinder 13 is rotatably sleeved with a combination cylinder 15, the combination cylinder 15 is sleeved on the outside of the guide cylinder 13, one end of the combination cylinder 15 is fixedly connected with a folding dustproof cylinder 16, the guide cylinder 13 is connected by the combination cylinder 15, can be installed and positioned, and when moving left and right, the dustproof cylinder 16 can be folded and extended, which is beneficial to isolate and protect the screw body 1 and improve the dustproof effect The effect will not cause interference, and it has high adaptability. One end of the foldable dust-proof cylinder 16 is fixedly connected to an annular frame 17, and a fixing hole 18 is provided on the surface of the annular frame 17. The foldable dust-proof cylinder 16 is slidably sleeved on the outer surface of the screw body 1, and a connecting screw 2 is threadedly installed on the surface of one end of the combination cylinder 15. A connecting screw 2 is provided at one end of the connecting screw 2, and a connecting ball head 21 is provided. The connecting ball head 21 is slidably connected to the inside of the annular groove 14, and the connecting ball head 21 is connected to the inside of the annular groove 14, so that the combination cylinder 15 can be connected to the guide cylinder 13, and can avoid in a circular manner to avoid torsion. At the same time, the combination cylinder 15 and the foldable dust-proof cylinder 17 can be pulled to move, which is beneficial to the combined installation for linked control, and it has high adaptability. The connecting screws 2 are distributed at equal angles on the outer surface of the guide cylinder 13.

[0026] See also Figure 2 and Figure 3 A support screw 22 is threadedly installed at one end of the combination tube 15, and the support screw 22 is located on one side of the screw body 1. A rotating block 23 is provided at one end of the support screw 22, and an arc plate 24 is rotatably installed on one side of the rotating block 23. The arc plate 24 is slidably connected to the outer surface of the screw body 1 and is distributed at equal angles at one end of the screw body 1. The arc plate is installed by the support screw, and the spacing can be adjusted by thread, which is conducive to fitting the screw body for guiding support and convenient adjustment.

[0027] See also Figure 3 and Figure 4 A spherical groove 25 is provided on the inner side of the arc plate 24, and a ball 26 is rollingly connected inside the spherical groove 25. The ball 26 is rollingly connected to the outer surface of the screw body 1 and is evenly distributed at equal angles. The combined cylinder 15 and the folding dust-proof cylinder 16 are symmetrically distributed at both ends of the screw body 1. The ball is connected by the spherical groove, which can be rollingly connected, which is convenient for support and guidance, avoids interference, and is also convenient for installation and use, thereby improving the accuracy and stability of adjustment.

[0028] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A dustproof ball screw and a ball screw assembly, comprising a screw body (1), one end of the screw body (1) being fixedly connected to a fixing plate (11), characterized in that: A ball nut (12) is rotatably mounted on the surface of one end of the screw body (1), and guide cylinders (13) are provided at both ends of the ball nut (12). An annular groove (14) is provided on one end of the outer surface of the guide cylinder (13). A combination cylinder (15) is rotatably sleeved on the outer surface of the guide cylinder (13), and the combination cylinder (15) is sleeved on the outer side of the guide cylinder (13). A folding dustproof cylinder (16) is fixedly connected to one end of the combination cylinder (15), and an annular frame (17) is fixedly connected to one end of the folding dustproof cylinder (16). A fixing hole (18) is provided on the surface of the annular frame (17). The folding dustproof cylinder (16) is slidably sleeved on the outer surface of the screw body (1). A connecting screw (2) is threadedly mounted on the surface of one end of the combination cylinder (15), and a connecting ball head (21) is provided at one end of the connecting screw (2). The connecting ball head (21) is slidably connected to the inside of the annular groove (14). The connecting screws (2) are distributed at equal angles on the outer surface of the guide cylinder (13).

2. The dustproof ball screw and ball screw assembly according to claim 1, characterized in that: A support screw (22) is threadedly mounted on one end of the combined cylinder (15), and the support screw (22) is located on one side of the screw rod body (1).

3. The dustproof ball screw and ball screw assembly according to claim 2, characterized in that: A rotating block (23) is provided at one end of the supporting screw (22), and an arc-shaped plate (24) is rotatably mounted on one side of the rotating block (23).

4. The dustproof ball screw and ball screw assembly according to claim 3, characterized in that: The arc-shaped plates (24) are slidably connected to the outer surface of the screw body (1) and are distributed at equal angles at one end of the screw body (1).

5. The dustproof ball screw and ball screw assembly according to claim 3, characterized in that: A spherical groove (25) is provided on the inner side of the arc-shaped plate (24), and a ball (26) is rollingly connected inside the spherical groove (25).

6. The dustproof ball screw and ball screw assembly according to claim 5, characterized in that: The balls (26) are rollingly connected to the outer surface of the screw body (1) and are evenly distributed at equal angles.

7. The dustproof ball screw and ball screw assembly according to claim 1, characterized in that: The combined cylinder (15) and the folding dustproof cylinder (16) are symmetrically distributed at two end positions of the screw rod body (1).

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