Dustproof lubricating small-size ball nut

Abstract

The utility model discloses a dustproof lubricating small volume ball nut, including nut body, circulator and snap spring, the both ends of nut body are equipped with mounting position, with the snap spring groove of mounting position intercommunication, circulator can be placed in said mounting position, snap spring is installed in said snap spring groove, snap spring is used for fixing circulator, and said mounting position is equipped with the mounting position. A backflow channel is formed in the nut body, notches are formed in the two sides of the backflow channel, and the backflow channel communicates with the ball pipeline through the circulator. An oil injection pipeline and an oil injection port are formed in the inner wall of the nut body, one end of the oil injection pipeline communicates with the backflow channel, the other end of the oil injection pipeline communicates with the oil injection port, a dustproof pad is arranged between the circulator and the clamping spring, and a plug is fixedly arranged on the dustproof pad and used for blocking the oil injection port.

Description

Technical Field

[0001] The utility model belongs to the technical field of ball screw nuts, and particularly relates to a small-volume ball nut with dust-proof and lubricating functions. Background Technique

[0002] A ball screw is a mechanical transmission device that realizes the conversion of efficient rotational motion and linear motion through the rolling friction of balls between the nut and the screw. It consists of a screw, a nut, and balls. The balls roll between the screw and the nut, reducing friction and improving transmission efficiency and accuracy.

[0003] As disclosed in the patent document "CN202392064U" for the "circulator", its technical solution is to use a C-shaped snap ring 80 to be buckled in the C-shaped snap ring grooves 45 and 46, and then quickly fix the front circulator 60 and the rear circulator 70, which can achieve the quick fixation of the front circulator 60 and the rear circulator 70 to the nut seat.

[0004] In this patent, the characteristics of small volume, easy assembly, and saving assembly man-hours are achieved through the setting of the circulator and the nut seat. However, during the long-term use of the ball screw of this patent, the friction force between the balls is likely to increase, and it is necessary to remove the circulator from the nut seat to add lubricating oil, and the process of adding lubricating oil is relatively cumbersome. Content of the Utility Model

[0005] The purpose of the utility model is to provide a small-volume ball nut with dust-proof and lubricating functions to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A small-volume ball nut with dust-proof and lubricating functions includes a nut body, a circulator, and a snap ring. Installation positions and snap ring grooves communicating with the installation positions are opened at both ends of the nut body. The circulator can be placed in the installation position, and the snap ring is installed in the snap ring groove. The snap ring is used to fix the circulator. A return channel is opened in the nut body, notches are opened on both sides of the return channel, and the return channel is communicated with the ball pipeline through the circulator.

[0008] An oil injection pipeline and an oil injection port are opened on the inner wall of the nut body. One end of the oil injection pipeline is communicated with the return channel, and the other end of the oil injection pipeline is communicated with the oil injection port. A dust-proof pad is arranged between the circulator and the snap ring, and a plug is fixedly arranged on the dust-proof pad to block the oil injection port.

[0009] Further technical solution: The circulator includes two positioning arc blocks and positioning convex ribs. A ball groove is formed between the two positioning arc blocks to guide the flow direction of the balls. The positioning convex ribs are arranged opposite to the positioning arc blocks.

[0010] Further technical solution: Among the two positioning arc blocks, the positioning arc block in contact with the dust-proof pad is provided with a semi-circular convex platform. A first positioning groove is formed on the nut body, and the first positioning groove is clamped with the semi-circular convex platform.

[0011] Further technical solution: A positioning convex platform is arranged on the side of the circulator away from the dust-proof pad. A second positioning groove is formed on the nut body, and the positioning convex platform is inserted into the second positioning groove.

[0012] Further technical solution: The plug is an elastic plug, and the plug is inclined relative to the dust-proof pad.

[0013] Further technical solution: A groove is formed on the outer wall of the nut body, and the groove is a circular groove.

[0014] Advantages of the present utility model:

[0015] For the ball screw provided by the present utility model, a dust-proof pad is arranged between the circlip and the outer wall of the circulator, which can enhance the dust-proof performance, thereby reducing the friction between the balls and the ball pipeline. An oil injection pipeline is formed on the side wall of the nut body, which improves the convenience for the operator to add lubricating oil between the balls, and further enhances the friction between the balls. An oil injection port communicated with the oil injection pipeline is formed on the upper surface of the side wall of the nut body, and a plug is arranged on the dust-proof pad in contact with the upper surface of the side wall of the nut body to block the dust-proof pad, so that the operator only needs to remove the circlip and the dust-proof pad, and then can add lubricating oil between the balls through the oil injection port.

[0016] Other features and advantages of the present utility model will be described in detail in the subsequent specific implementation part. Description of the drawings

[0017] Figure 1 : Assembly drawing of the overall structure of the present utility model and the screw.

[0018] Figure 2 : Exploded view of the overall structure of the present utility model and the screw.

[0019] Figure 3 : Sectional view of the overall structure of the present utility model and the screw.

[0020] Figure 4 : Circulator diagram of the present utility model.

[0021] Figure 5 : Nut body diagram of the present utility model.

[0022] Reference numerals: 1, screw; 2, nut body; 3, first spiral groove; 4, second spiral groove; 5, return channel; 6, circulator; 7, groove; 8, mounting position; 9, snap ring groove; 10, dust-proof pad; 11, snap ring; 12, oil injection pipe; 13, oil injection port; 14, plug; 15, positioning arc block; 16, positioning rib; 17, ball groove; 18, semi-circular boss; 19, first positioning groove; 20, positioning boss; 21, second positioning groove Detailed implementation manners

[0023] 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.

[0024] Please refer to Figures 1-5 ;

[0025] A small-volume ball nut with dust-proof and lubrication functions includes a nut body 2. A screw 1 is rotatably arranged on the nut body 2. The screw 1 is provided with a first spiral groove 3, and the nut body 2 is provided with a second spiral groove 4. The screw 1 is passed through the nut body 2, and the first spiral groove 3 and the second spiral groove 4 are combined to form a ball pipeline. A number of balls are arranged in the ball pipeline. The rotation between the screw 1 and the threads of the nut body 2 is replaced by the rolling of the balls, reducing the friction between the screw 1 and the nut body 2. Correspondingly, a return channel 5 is opened in the nut body 2, and the return channel 5 is communicated with the ball pipeline through a circulator 6, so that the balls can circulate in the ball pipeline. It should be noted that in some preferred embodiments, a groove 7, preferably a circular groove 7, is opened on the outer wall of the nut body 2 to meet the application requirements of a wide range of scenarios.

[0026] In this embodiment, the circulator 6 is installed at both ends of the nut body 2. Installation positions 8 are provided at both ends of the nut body 2. The circulator 6 is detachably placed in the installation positions 8. The number of the installation positions 8 and the circulators 6 is preferably 4, and they are located in pairs at one end of the circulator 6 respectively, further increasing the circulation efficiency and enabling it to be applicable to a wider range of scenarios. Clamp spring grooves 9 communicating with the installation positions 8 are further provided at both ends of the circulator 6. A dust-proof pad 10 and a clamp spring 11 are sequentially arranged on the circulator 6. The dust-proof pad 10 and the clamp spring 11 are clamped with the clamp spring grooves 9, so that the dust-proof pad 10 and the circulator 6 can be fixed by the clamp spring 11. In order to further improve the convenience of adding lubricating oil to this ball screw, an oil injection pipeline 12 and an oil injection port 13 are provided on the inner wall of the nut body 2. One end of the oil injection pipeline 12 is communicated with the return channel 5, and the other end of the oil injection pipeline 12 is communicated with the oil injection port 13. For the convenience of the circulation of the lubricating oil, the oil injection pipeline 12 is inclined. An inclined plug 14 for blocking the oil injection port 13 is fixedly arranged on the dust-proof pad 10 arranged between the circulator 6 and the clamp spring 11. Both the plug 14 and the dust-proof pad 10 are made of elastic materials. Therefore, in this embodiment, the plug 14 and the dust-proof pad 10 are integrally formed or bonded. The plug 14 is preferably inclined to better adapt to the oil injection pipeline 12.

[0027] Generally, for the convenience of oil injection, the prior art is to provide an oil injection pipeline 12 on the outer surface of the side wall of the nut body 2 that is communicated with the ball pipeline. However, this kind of oil injection pipeline 12 has two disadvantages. First, a separate plug 14 is still needed to block the oil injection pipeline 12, and in actual use, the nut body 2 moves linearly, and the stability of the installation of the plug 14 also needs to be considered. Second, for a small-volume ball screw, taking the "circulator 6" disclosed in the patent document "CN202392064U" as an example, only the oil injection pipeline 12 can be communicated with the ball pipeline, and it is difficult to communicate the oil injection pipeline 12 with the return channel 5, and it is difficult to effectively reduce the friction between the balls and the return channel 5. In other embodiments of the present application, the oil injection pipeline 12 can be provided with branch channels to be simultaneously communicated with the ball pipeline and the return channel 5.

[0028] In this embodiment, the circulator 6 further includes two positioning arc blocks 15 and a positioning rib 16. A ball groove 17 is formed between the two positioning arc blocks 15 to guide the flow direction of the balls. The positioning rib 16 is arranged opposite to the positioning arc block 15, and the positioning rib 16 is located on the side of the positioning arc block 15 close to the ball pipeline. A semi-circular boss 18 is provided on the positioning arc block 15 that abuts against the dust-proof pad 10 among the two positioning arc blocks 15. Correspondingly, a first positioning groove 19 is provided on the nut body 2, and the first positioning groove 19 is clamped with the semi-circular boss 18. A positioning boss 20 is provided on the side of the circulator 6 away from the dust-proof pad 10, and a second positioning groove 21 is provided on the nut body 2. The positioning boss 20 is inserted into the second positioning groove 21. Through the dual positioning effect of the semi-circular boss 18 and the positioning boss 20, the circulator 6 is stably positioned on the installation position 8.

[0029] Working principle: During assembly, the operator places the circulator 6 on the installation position 8, inserts the positioning boss 20 into the second positioning groove 21, and at the same time inserts the semi-circular boss 18 into the first positioning groove 19, so as to accurately align the position of the circulator 6 with the installation position 8, making it convenient to place the circulator 6 into the installation position 8. Then, the dust-proof pad 10 and the snap ring 11 are placed in sequence, and the dust-proof pad 10, the snap ring 11 are clamped with the snap ring groove 9, thereby fixing the circulator 6 and the dust-proof pad 10. It should be noted that the plug 14 of the dust-proof pad 10 should correspond to the oil injection to facilitate the plug 14 to be inserted into the oil injection port 13, and at the same time, it also limits the placement position of the dust-proof pad 10; using the snap ring 11 to fix the circulator 6 can further reduce the volume of the circulator 6, and thus reduce the volume of the ball screw; using the dust-proof pad 10 improves the dust-proof performance of the ball screw;

[0030] Suppose that the friction between the balls increases due to long-term use. The operator can take out the snap ring 11, then take out the dust-proof pad 10, thereby taking out the plug 14, and then add lubricating oil into the oil injection pipeline 12 through the oil injection port 13, so as to reduce the friction between the balls and the friction between the balls and the return channel 5.

[0031] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0032] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dustproof and lubricated small-volume ball nut, comprising a nut body (2), a circulator (6) and a retaining spring (11), characterized in that: Both ends of the nut body (2) are provided with mounting positions (8) and retaining ring grooves (9) connected to the mounting positions (8); the circulator (6) is placed at the mounting positions (8); the retaining ring (11) is installed in the retaining ring grooves (9); the retaining ring (11) is used to fix the circulator (6); a return flow channel (5) is provided in the nut body (2); notches are provided on both sides of the return flow channel (5); the return flow channel (5) is connected to the ball pipe through the circulator (6); An oil injection pipe (12) and an oil injection port (13) are provided on the inner wall of the nut body (2); one end of the oil injection pipe (12) is connected to the return channel (5); the other end of the oil injection pipe (12) is connected to the oil injection port (13); a dustproof pad (10) is provided between the circulator (6) and the retaining spring (11); a plug (14) is fixedly provided on the dustproof pad (10) for blocking the oil injection port (13).

2. A dustproof and lubricated small-volume ball nut according to claim 1, characterized in that: The circulator (6) comprises two positioning arc blocks (15) and a positioning convex rib (16). A ball groove (17) is formed between the two positioning arc blocks (15) to guide the flow direction of the balls. The positioning convex rib (16) and the positioning arc block (15) are arranged opposite to each other.

3. A dustproof and lubricated small-volume ball nut according to claim 2, characterized in that: The positioning arc block (15) of the two positioning arc blocks (15) that abuts against the dustproof pad (10) is provided with a semicircular boss (18), and a positioning groove (19) is provided on the nut body (2), and the positioning groove (19) is clamped with the semicircular boss (18).

4. A dustproof and lubricated small-volume ball nut according to claim 3, characterized in that: A positioning boss (20) is provided on the side of the circulator (6) away from the dustproof pad (10), and a second positioning groove (21) is provided on the nut body (2), and the positioning boss (20) is plugged into the second positioning groove (21).

5. A dustproof and lubricated small-volume ball nut according to claim 1, characterized in that: The plug (14) is an elastic plug (14), and the plug (14) is arranged obliquely relative to the dustproof pad (10).

6. A dustproof and lubricated small-volume ball nut according to claim 1, characterized in that: The outer wall of the nut body (2) is provided with a groove (7), and the groove (7) is a circular groove (7).

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