Lead screw nut

Abstract

The utility model relates to a nut, in particular to a lead screw nut which comprises a nut body. The retainer is arranged in the nut main body; the steel ball is arranged in the retainer; and the number of the fastening rivets is four, the four fastening rivets are all connected to the nut body through threads, and the fastening rivets are connected with the retainer through threads. The nut body is sleeved on the ball screw, so that the ball screw can drive the nut body to move through the steel ball, the circulating motion mode of the steel ball between the nut body and the ball screw is changed, the requirement for motion of the large-lead ball screw can be met, the motion precision is higher, the transmission efficiency is higher, the machining cost is lower, and the service life is longer. And the wear resistance is better.

Description

Technical Field

[0001] The utility model relates to a nut, in particular to a lead screw nut. Background Art

[0002] The lead screw nut is one of the core components in the ball screw drive system. It cooperates with the ball screw to realize the conversion of rotational motion into linear motion, and is widely used in fields requiring precise position control and high-efficiency transmission, such as numerical control machine tools, robot joints, etc.

[0003] Currently, most ball screw nuts are composed of a nut body, steel balls, a recirculator and a sealing ring. The steel balls connect the lead screw and the nut to realize the function of converting the rotational motion of the lead screw into the linear motion of the nut. However, the motion form of the steel balls is relatively single and cannot meet the motion of lead screws with a large lead. For example, there are huge limitations in traditional nuts in the subway door opening and closing structure, and the number of steel balls is large. The steel balls are installed in the recirculator, resulting in high processing difficulty and processing cost. Summary of the Utility Model

[0004] In order to overcome the disadvantages that the motion form of the steel balls is relatively single and cannot meet the motion of lead screws with a large lead, and the processing difficulty and processing cost are relatively high, the utility model provides a lead screw nut.

[0005] Technical Solution: A lead screw nut includes: a nut body; a cage, which is arranged inside the nut body; steel balls, which are arranged inside the cage; four set screws, all four set screws are connected to the nut body through threads, and the set screws and the cage are connected through threads.

[0006] As a preferred technical solution of the utility model, it further includes: a stabilizing ring, which is slidably connected to the nut body and is used to block the set screws.

[0007] As a preferred technical solution of the utility model, it further includes: a connecting block, which is connected to the stabilizing ring; a fixing block, which is connected to the nut body; a screw, and the connecting block and the fixing block are connected through the screw.

[0008] As a preferred technical solution of the utility model, it further includes: two mounting rings, which are respectively connected to the left and right ends of the nut body; two internal thread sleeves, which are respectively rotatably connected inside the two mounting rings.

[0009] As a preferred technical solution of the utility model, it further includes: four arc-shaped brushes, two of the arc-shaped brushes are arranged on the left mounting ring, and the other two arc-shaped brushes are arranged on the right mounting ring.

[0010] As a preferred technical solution of the present utility model, two arc-shaped brushes on the same mounting ring are combined into a complete ring-shaped brush.

[0011] The beneficial effects are as follows: By sleeving the nut body onto the ball screw, the present utility model enables the ball screw to drive the nut body to move through steel balls, changes the circular motion mode of the steel balls between the nut body and the ball screw, can meet the movement of large-lead ball screws, has higher movement accuracy, higher transmission efficiency, lower processing cost, longer service life, and better wear resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model.

[0013] Figure 2 It is an exploded view of the nut body, cage, steel balls and set screws of the present utility model.

[0014] Figure 3 It is a top view of the nut body and set screws of the present utility model.

[0015] Figure 4 It is a cross-sectional view of the nut body, cage and steel balls of the present utility model.

[0016] Figure 5 It is a three-dimensional structural schematic diagram of the mounting ring and internal thread sleeve of the present utility model.

[0017] Reference numerals in the drawings: 1: nut body, 2: cage, 3: steel ball, 4: set screw, 5: stabilizing ring, 6: connecting block, 7: fixing block, 8: screw, 9: mounting ring, 10: internal thread sleeve, 11: arc-shaped brush. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0019] As Figures 1 - 4 shown, a ball screw nut includes a nut body 1, a cage 2, steel balls 3 and set screws 4. A cage 2 is provided inside the nut body 1, steel balls 3 are provided inside the cage 2, and four set screws 4 are evenly spaced circumferentially outside the nut body 1 and are connected by threads. The set screws 4 and the cage 2 are connected by threads.

[0020] As Figure 1As shown in the figure, it further includes a stabilizing ring 5, and the stabilizing ring 5 is slidably connected to the nut body 1.

[0021] As Figure 1 shown in the figure, it further includes a connecting block 6, a fixing block 7 and a screw 8. The connecting block 6 is connected to the front side of the stabilizing ring 5, the fixing block 7 is connected to the front side of the nut body 1, the screw 8 is threadedly connected to the connecting block 6, and the screw 8 and the fixing block 7 are threadedly connected.

[0022] As Figure 1 and Figure 5 shown in the figure, it further includes a mounting ring 9 and an internal thread sleeve 10. The mounting rings 9 are connected to both the left and right ends of the nut body 1, and the internal thread sleeves 10 are rotatably connected inside the mounting rings 9.

[0023] As Figure 1 shown in the figure, it further includes an arc-shaped brush 11. Two arc-shaped brushes 11 are connected to the mutually remote sides of the two mounting rings 9, and the two arc-shaped brushes 11 on the same mounting ring 9 form a complete ring-shaped brush.

[0024] Put the nut body 1 onto the ball screw. The steel balls 3 cooperate with the ball screw, and the internal thread sleeves 10 also cooperate with the ball screw. When the ball screw rotates, the nut body 1 is driven to move through the steel balls 3. By changing the circulating movement mode of the steel balls 3 between the nut body 1 and the ball screw, it can meet the movement of the large-lead ball screw, with higher movement accuracy, higher transmission efficiency, lower processing cost, longer service life, better wear resistance. The stabilizing ring 5 can block the set screw 4 to prevent the set screw 4 from loosening. The screw 8 can fix the stabilizing ring 5 to prevent the stabilizing ring 5 from sliding. The internal thread sleeves 10 cooperate with the ball screw, so that the internal thread sleeves 10 can block the external debris and prevent the debris from entering the nut body 1. The arc-shaped brushes 11 can clean the debris on the ball screw to prevent the debris from getting stuck between the nut body 1 and the ball screw. The two arc-shaped brushes 11 on the same mounting ring 9 form a complete ring-shaped brush, and the ring-shaped brush surrounds the ball screw, with a larger cleaning range and better cleaning effect.

[0025] The above are only the embodiments of the present invention and are not used to limit the present invention. All equivalent replacements made within the principle of the present invention shall be included in the protection scope of the present invention. The content not elaborated in detail in the present invention belongs to the known prior art of those skilled in the art.

Claims

1. A screw nut, characterized in that: include: Nut body (1); A retaining frame (2), wherein the retaining frame (2) is arranged inside the nut body (1); A steel ball (3), wherein the steel ball (3) is arranged in the retaining frame (2); The fixing rivets (4) are four in number, and the four fixing rivets (4) are all connected to the nut body (1) through threads, and the fixing rivets (4) and the retaining frame (2) are connected through threads.

2. A screw nut as claimed in claim 1, characterized in that include: A stabilizing ring (5) is slidably connected to the nut body (1), and the stabilizing ring (5) is used to block the fixing rivet (4).

3. A screw nut as claimed in claim 2, characterized in that include: A connecting block (6), the connecting block (6) is connected to the stabilizing ring (5); A fixing block (7), the fixing block (7) being connected to the nut body (1); Screw (8), the connecting block (6) and the fixing block (7) are connected by the screw (8).

4. A screw nut as claimed in claim 3, characterized in that include: A mounting ring (9), wherein two mounting rings (9) are provided, and the two mounting rings (9) are respectively connected to the left and right ends of the nut body (1); The inner thread sleeve (10) is provided with two inner thread sleeves (10), and the two inner thread sleeves (10) are rotatably connected in the two mounting rings (9) respectively.

5. A screw nut as claimed in claim 4, characterized in that include: Arc-shaped brushes (11), four arc-shaped brushes (11) are provided, two of which are provided on the mounting ring (9) on the left side, and the other two arc-shaped brushes (11) are provided on the mounting ring (9) on the right side.

6. A lead screw nut as claimed in claim 5, characterized in that: The two arc-shaped brushes (11) on the same mounting ring (9) are combined into a complete annular brush.

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