Self-lubricating device for ball screw pair

Abstract

The utility model provides a self-lubricating device for a ball screw pair. The self-lubricating device comprises a screw body, a nut is arranged on the peripheral side face of the lead screw body, an oil box is fixedly connected to the upper end of the nut, a sealing cover is arranged at the upper end of the oil box, four sets of screws are arranged at the upper end of the sealing cover, the sealing cover is fixedly connected with the oil box through the screws, and a ball groove is formed in the nut. A lower oil hole is formed in the upper end of the nut in a penetrating mode and communicates with the ball groove. According to the self-lubricating device for the ball screw pair, lubricating oil is poured into the oil box and enters the lower oil hole at the moment, when the screw body rotates, the bead rolls in the ball groove, and the bead passing through the bottom of the oil-stained ball is in contact with the oil-stained ball and drives the oil-stained ball to rotate at the moment; when the oil-stained beads rotate, lubricating oil stained on the surfaces of the oil-stained beads can be adhered to the surfaces of the beads in contact with the oil-stained beads, so that the effect of lubricating the beads is achieved, and the beads can be automatically lubricated through the structure.

Description

Technical Field

[0001] This utility model relates to the field of ball screw pair technology, and in particular to a self-lubricating device for ball screw pairs. Background Technology

[0002] A ball screw pair, also known as a ball screw assembly or ball screw joint, consists of two matching parts: a screw and a nut. It is the most precise and commonly used transmission device in transmission machinery. The ball screw pair is a helical transmission element with steel balls as rolling elements between the screw and the nut. It can convert rotary motion into linear motion, or vice versa. Therefore, the ball screw pair is both a transmission component and a component that converts between linear and rotary motion.

[0003] In the field of ball screw assembly technology, most existing ball screw assemblies are lubricated by manually applying lubricant, which is quite troublesome.

[0004] Therefore, it is necessary to provide a self-lubricating device for ball screw pairs to solve the above-mentioned technical problems. Utility Model Content

[0005] This utility model provides a self-lubricating device for ball screw pairs, which solves the problem of the cumbersome process of manually applying lubricant to lubricate ball screw pairs.

[0006] To solve the above-mentioned technical problems, the present invention provides a self-lubricating device for ball screw pairs, comprising: a screw body;

[0007] A nut is provided on the peripheral side of the lead screw body. An oil box is fixedly connected to the upper end of the nut. A sealing cover is provided on the upper end of the oil box. Screws are provided on the upper end of the sealing cover, and there are four sets of screws. The sealing cover is fixedly connected to the oil box by the screws. A ball groove is opened inside the nut. An oil drain hole is opened through the upper end of the nut. The oil drain hole is connected to the ball groove. A rotating ball groove is opened inside the oil drain hole. An oil-adhesive bead is rotatably connected inside the rotating ball groove.

[0008] Preferably, a sealing head is slidably connected to the right side of the oil box, and a first sealing ring is fixedly connected to the periphery of the sealing head.

[0009] Preferably, a baffle is fixedly connected to the left end of the sealing head, and a second sealing ring is fixedly connected to the right side of the baffle.

[0010] Preferably, a guide rod is fixedly connected to the right side of the inner wall of the oil box, and two sets of guide rods are provided. The guide rods are slidably connected to the baffle.

[0011] Preferably, a limit block is fixedly connected to the left end of the guide rod.

[0012] Preferably, a spring is sleeved on the peripheral side of the guide rod, and the spring is located between the limiting block and the baffle.

[0013] Compared with related technologies, the self-lubricating device for ball screw pairs provided by this utility model has the following beneficial effects:

[0014] This utility model provides a self-lubricating device for ball screw pairs. Lubricating oil is poured into the oil box, entering the lower oil hole. When the screw body rotates, the balls roll inside the ball grooves. Balls passing the bottom of the oil-coated balls contact the oil-coated balls, causing them to rotate. The rotating oil-coated balls transfer the lubricating oil onto the contacting balls, thus achieving lubrication. This structure allows for self-lubrication of the balls, simplifying lubrication and maintenance. The sealing head is pressed into the oil box, causing a baffle to slide along the guide rod. When the sealing head reaches its leftmost position, lubricant can be injected into the oil box. After replenishing the lubricant, the sealing head is released, and the spring force allows it to return to its original position. At this point, the first and second sealing rings seal the oil box inlet. This structure makes adding lubricant very convenient. Attached Figure Description

[0015] Figure 1 A schematic diagram of a preferred embodiment of the self-lubricating device for ball screw pairs provided by this utility model;

[0016] Figure 2 for Figure 1 The diagram shows a front view and cross-sectional view of the nut and oil box.

[0017] Figure 3 for Figure 2 An enlarged structural diagram of region A is shown below;

[0018] Figure 4 for Figure 2 An enlarged structural diagram of region B is shown.

[0019] The following are the labels in the diagram: 1. Lead screw body; 2. Nut; 3. Oil box; 4. Sealing cover; 5. Screw; 6. Ball groove; 7. Oil hole; 8. Ball groove; 9. Oil dropper; 10. Sealing head; 11. First sealing ring; 12. Baffle; 13. Second sealing ring; 14. Guide rod; 15. Limiting block; 16. Spring. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Please refer to the following: Figure 1 , Figure 2 , Figure 3 and Figure 4 ,in Figure 1A schematic diagram of a preferred embodiment of the self-lubricating device for ball screw pairs provided by this utility model; Figure 2 for Figure 1 The diagram shows a front view and cross-sectional view of the nut and oil box. Figure 3 for Figure 2 An enlarged structural diagram of region A is shown below; Figure 4 for Figure 2 The enlarged structural diagram of area B shown shows the self-lubricating device for the ball screw pair, which includes: screw body 1;

[0022] Nut 2 is provided on the side of the lead screw body 1. Oil box 3 is fixedly connected to the upper end of nut 2. Sealing cover 4 is provided on the upper end of oil box 3. Screw 5 is provided on the upper end of sealing cover 4. There are four sets of screw 5. Sealing cover 4 is fixedly connected to oil box 3 through screw 5. Ball groove 6 is opened inside nut 2. Oil hole 7 is opened through the upper end of nut 2. Oil hole 7 is connected to ball groove 6. Rotary ball groove 8 is opened inside the oil hole 7. Oil beads 9 are rotatably connected inside the rotating ball groove 8. The setting of sealing cover 4 and screw 5 facilitates the cleaning of the inside of oil box 3. Ball groove 6 is provided with balls.

[0023] A sealing head 10 is slidably connected to the right side of the oil box 3, and a first sealing ring 11 is fixedly connected to the side of the sealing head 10.

[0024] A baffle 12 is fixedly connected to the left end of the sealing head 10, and a second sealing ring 13 is fixedly connected to the right side of the baffle 12.

[0025] A guide rod 14 is fixedly connected to the right side of the inner wall of the oil box 3, and two sets of guide rods 14 are provided. The guide rod 14 is slidably connected to the baffle 12.

[0026] The left end of the guide rod 14 is fixedly connected to the limit block 15.

[0027] A spring 16 is sleeved on the side of the guide rod 14, and the spring 16 is located between the limit block 15 and the baffle 12.

[0028] The working principle of the self-lubricating device for ball screw pairs provided by this utility model is as follows:

[0029] Step 1: When using, pour the lubricating oil into the oil box 3. At this time, the lubricating oil enters the lower oil hole 7. When the lead screw body 1 rotates, the balls roll in the ball groove 6. At this time, the balls passing the bottom of the oil-adhesive ball 9 will contact the oil-adhesive ball 9 and drive the oil-adhesive ball 9 to rotate. The rotation of the oil-adhesive ball 9 will stick the lubricating oil on its surface to the surface of the ball it contacts, thereby achieving the effect of lubricating the balls.

[0030] Step 2: Squeeze the sealing head 10 into the oil box 3. When the sealing head 10 is squeezed, it will cause the baffle 12 to slide along the guide rod 14. When the sealing head 10 slides to the leftmost side, lubricant can be injected into the oil box 3. After the lubricant is replenished, release the sealing head 10. At this time, the sealing head 10 can be reset by the elastic force of the spring 16. At this time, the first sealing ring 11 and the second sealing ring 13 can seal the feed port of the oil box 3.

[0031] Compared with related technologies, the self-lubricating device for ball screw pairs provided by this utility model has the following beneficial effects:

[0032] Lubricating oil is poured into the oil box 3. At this time, the lubricating oil enters the lower oil hole 7. When the lead screw body 1 rotates, the balls roll in the ball groove 6. At this time, the balls passing the bottom of the oil-adhesive ball 9 will contact the oil-adhesive ball 9 and drive the oil-adhesive ball 9 to rotate. The rotation of the oil-adhesive ball 9 will stick the lubricating oil on its surface to the surface of the ball it contacts, thereby achieving the effect of lubricating the ball. Through this structure, the balls can be lubricated by itself, and the lubrication and maintenance are relatively simple. Squeeze the sealing head 10 into the oil box 3. The sealing head 10 will be squeezed and will drive the baffle 12 to slide along the guide rod 14. When the sealing head 10 slides to the leftmost side, lubricant can be injected into the oil box 3. After the lubricant is replenished, the sealing head 10 is released. At this time, the spring force of the spring 16 can make the sealing head 10 return to its original position. At this time, the first sealing ring 11 and the second sealing ring 13 can seal the feed port of the oil box 3. This structure makes it very convenient to add lubricant.

[0033] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A self-lubricating device for ball screw pairs, characterized in that, include: Screw body(1); The lead screw body (1) is provided with a nut (2) on its periphery. An oil box (3) is fixedly connected to the upper end of the nut (2). A sealing cover (4) is provided at the upper end of the oil box (3). A screw (5) is provided at the upper end of the sealing cover (4), and four sets of screws (5) are provided. The sealing cover (4) is fixedly connected to the oil box (3) by the screws (5). A ball groove (6) is provided inside the nut (2). A lower oil hole (7) is provided through the upper end of the nut (2). The lower oil hole (7) is connected to the ball groove (6). A rotating ball groove (8) is provided inside the lower oil hole (7). An oil-adhesive bead (9) is rotatably connected inside the rotating ball groove (8).

2. The self-lubricating device for ball screw pairs according to claim 1, characterized in that, A sealing head (10) is slidably connected to the right side of the oil box (3), and a first sealing ring (11) is fixedly connected to the periphery of the sealing head (10).

3. The self-lubricating device for ball screw pairs according to claim 2, characterized in that, A baffle (12) is fixedly connected to the left end of the sealing head (10), and a second sealing ring (13) is fixedly connected to the right side of the baffle (12).

4. The self-lubricating device for ball screw pairs according to claim 3, characterized in that, A guide rod (14) is fixedly connected to the right side of the inner wall of the oil box (3), and two sets of guide rods (14) are provided. The guide rod (14) is slidably connected to the baffle (12).

5. The self-lubricating device for ball screw pairs according to claim 4, characterized in that, The guide rod (14) is fixedly connected to the left end of the limit block (15).

6. The self-lubricating device for ball screw pairs according to claim 5, characterized in that, A spring (16) is sleeved on the periphery of the guide rod (14), and the spring (16) is located between the limiting block (15) and the baffle (12).

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