A high-performance ball screw structure for environmental protection equipment

Abstract

This utility model belongs to the field of ball screw technology, specifically relating to a high-performance ball screw structure for environmental protection equipment. It includes a screw and a nut, with the nut mounted on the screw. End caps are installed at both ends of the nut, each end cap comprising an outer ring. One end of the outer ring is fixed to one end of the nut. Inside the outer ring, from the outside in, are sequentially arranged a sealing cap, an oil reservoir cap, and a coating cap. The oil reservoir cap contains an oil reservoir cavity, with an oil injection block at one end. The other end of the oil reservoir cavity is located inside the oil reservoir cap and corresponds to the first thread groove of the screw. Supports are provided at both ends of the screw, with a grease injection pipe installed on one side of the support at a position corresponding to the oil injection block. This utility model enables automatic grease replenishment without machine shutdown or disassembly by integrating the grease injection pipe into the screw support and the oil injection block on the nut end cap, ensuring long-term reliable operation of the environmental protection equipment.

Description

Technical Field

[0001] This utility model belongs to the field of ball screw technology, specifically relating to a high-performance ball screw structure for environmental protection equipment. Background Technology

[0002] As a key transmission component that converts rotary motion into precise linear motion, the ball screw is widely used in various environmental protection equipment due to its high precision, high efficiency, and reversible transmission characteristics. Examples include flow promoters in wastewater treatment plants, sludge filter presses, and sampling probe drive mechanisms in continuous flue gas monitoring systems. These environmental protection devices typically require long-term continuous operation under harsh conditions such as high temperature, high humidity, corrosive media, or environments filled with dust particles. These harsh working environments place extremely stringent requirements on the sealing and lubrication performance of the ball screw. Regular grease replenishment is a necessary maintenance method to ensure low friction, low wear, and long service life of the ball screw. However, the grease nipple of existing ball screws is mostly located on the outer diameter of the nut, requiring manual operation for grease replenishment. The location of the ball screw in environmental protection equipment is not always suitable for manual operation; some equipment even requires shutdown when replenishing grease, significantly impacting work efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a high-performance ball screw structure for environmental protection equipment. By integrating the grease injection pipe into the screw support and the oil injection block on the nut end cap, automatic grease replenishment can be achieved without stopping the machine or disassembling, ensuring the long-term reliable operation of the environmental protection equipment.

[0004] The specific technical solution adopted by this utility model is as follows: A high-performance ball screw structure for environmental protection equipment includes a screw and a nut. The nut is mounted on the screw, and end caps are installed at both ends of the nut. Each end cap includes an outer ring, one end of which is fixed to one end of the nut. Inside the outer ring, from the outside to the inside, a sealing cap, an oil reservoir cap, and a coating cap are arranged sequentially. The oil reservoir cap has an oil reservoir cavity inside, and an oil injection block is provided at one end of the oil reservoir cavity. The other end of the oil reservoir cavity is located inside the oil reservoir cap and corresponds to the first thread groove of the screw. Supports are provided at both ends of the screw, and a grease injection tube is installed on one side of the support at a position corresponding to the oil injection block.

[0005] Furthermore, the sealing cap, oil storage cap, and application cap have sliding grooves inside their tops. The oil injection block is slidably installed inside the sliding grooves. One end of the oil injection block is provided with a spring groove, and an elastic element is provided inside the spring groove. The other end of the oil injection block is provided with a curved oil injection passage. When the oil injection block is attached to one end of the application cap, one end of the curved oil injection passage is aligned with one end of the oil storage cavity. When the oil injection block is attached to one end of the sealing cap, one side of the oil injection block blocks one end of the oil storage cavity.

[0006] Furthermore, a dust removal scraper is provided on the inner side of the sealing cover. The dust removal scraper is made of a hard material, and the... The dust removal scraper is in close contact with the first threaded groove on the surface of the lead screw, and a uniform coating scraper is provided on the inner side of the coating cover.

[0007] Furthermore, the uniform coating scraper is made of a flexible material, and the uniform coating scraper and the first threaded groove on the surface of the lead screw are provided with... There is a gap.

[0008] Furthermore, the nut includes a movable stage, the inner wall of which is provided with a second threaded groove, and the second threaded groove on the inner wall of the movable stage corresponds to the first threaded groove provided on the surface of the lead screw, and the first threaded groove and the second threaded groove together form a rolling groove. A circuit pipe is provided inside the movable stage and between the two reversers, and rolling balls are provided in the rolling groove and the circuit pipe.

[0009] Furthermore, a reverser is installed at both ends of the moving stage and at both ends of the second threaded groove, and the two reversers are arranged in opposite directions. The rolling groove and the loop pipe are connected through the two reversers. The rolling groove, the two reversers and the loop pipe together form a circulating raceway.

[0010] The technical effects achieved by this utility model are as follows: This invention automatically connects the grease injection tube and the oil injection block by moving the nut to a fixed position, thus replenishing the grease. This process requires no manual operation, making it more convenient. In addition, the oil injection block has an elastic reset function, which can seal the oil storage cavity after reset, effectively preventing external dust and moisture from entering the nut during non-grease injection periods, thus maintaining the cleanliness of the grease. This utility model uses a sealing cap, a coating cap, a dust removal scraper, and a uniform coating scraper arranged in sequence. The sealing cap and the dust removal scraper can effectively remove contaminants from the surface of the lead screw and protect the internal raceway. The coating cap and the uniform coating scraper can ensure that the grease can cover the first thread groove with a uniform thickness, increase the lubrication effect, and reduce friction loss. At the same time, the inner dust removal scraper can also recover some of the old grease, reduce grease loss, and extend service life and operational stability. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a partial cross-sectional schematic diagram of the lead screw, nut, and end cap in this utility model; Figure 3 This is a cross-sectional schematic diagram of the connection structure between the lead screw and one end of the end cap in this utility model; Figure 4 This is an exploded view of the structure of the end cap of this utility model.

[0012] The attached diagram lists the components represented by each number as follows: 1. Lead screw; 2. Nut; 3. End cap; 11. Support; 12. Grease injection pipe; 21. Moving table; 22. Reversing device; 23. Ball bearing; 31. Outer ring collar; 32. Sealing cap; 33. Oil reservoir cap; 34. Coating cap; 35. Oil reservoir; 36. Sliding groove; 37. Oil injection block; 38. Elastic element; 39. Curved oil injection passage; 40. Dust removal scraper; 41. Coating scraper. Detailed Implementation

[0013] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0014] like Figures 1 to 4 As shown, a high-performance ball screw structure for environmental protection equipment includes a screw 1 and a nut 2. The nut 2 is mounted on the screw 1. Both ends of the nut 2 are equipped with end caps 3. The end caps 3 include an outer ring 31. One end of the outer ring 31 is fixed to one end of the nut 2. The outer ring 31 is provided with a sealing cap 32, an oil storage cap 33 and a coating cap 34 arranged sequentially from the outside to the inside. The oil storage cap 33 is provided with an oil storage cavity 35. One end of the oil storage cavity 35 is provided with an oil injection block 37. The other end of the oil storage cavity 35 is located inside the oil storage cap 33 and corresponds to the first thread groove of the screw 1. Both ends of the screw 1 are provided with supports 11. A grease injection pipe 12 is installed on one side of the support 11 at the position corresponding to the oil injection block 37. In the above description, the grease injection blocks 37 for replenishing grease are located at both ends of the nut 2. When grease needs to be replenished, the nut 2 is driven to move towards the support 11 by rotating the screw 1. When the nut 2 moves to one end of one of the supports 11, the grease injection tube 12 aligns with and contacts the grease injection block 37. At this time, the grease is pushed out from the grease injection tube 12 by an external device and injected into the oil storage cavity 35 through the grease injection block 37. A portion of the grease is temporarily stored in the oil storage cavity 35, while a portion of the grease enters the first thread groove corresponding to the oil storage cavity 35. When the nut 2 moves linearly, it is evenly coated by the coating cover 34 and transported into its interior.

[0015] Please refer to the following: Figure 2 , Figure 3 and Figure 4As shown, the sealing cap 32, the oil storage cap 33 and the top of the application cap 34 are provided with sliding grooves 36. The oil injection block 37 is slidably installed inside the sliding groove 36. One end of the oil injection block 37 is provided with a spring groove, and an elastic element 38 is provided in the spring groove. The other end of the oil injection block 37 is provided with a curved oil injection passage 39. When the oil injection block 37 is attached to one end of the application cap 34, one end of the curved oil injection passage 39 is aligned with one end of the oil storage cavity 35. When the oil injection block 37 is attached to one end of the sealing cap 32, one side of the oil injection block 37 blocks one end of the oil storage cavity 35. As described above, when replenishing grease, the grease injection tube 12 is aligned with the grease injection block 37 by controlling the movement of the nut 2. At this time, the end of the grease injection tube 12 is aligned with the inlet of the curved grease injection passage 39, and the grease injection block 37 is squeezed to slide in the sliding groove 36. At this time, the elastic element 38 contracts, and the other end of the curved grease injection passage 39 is aligned with the oil storage cavity 35. After injecting sufficient grease into the oil storage cavity 35 through the grease injection tube 12, when the nut 2 moves in the opposite direction, the grease injection tube 12 and the grease injection block 37 are separated, the elastic element 38 rebounds, and the grease injection block 37 is reset. At this time, one end of the oil storage cavity 35 is blocked by one end of the grease injection block 37, which can prevent external dust from contacting the grease and keep the grease clean.

[0016] Please refer to it again. Figure 4 As shown, a dust removal scraper 40 is provided on the inner side of the sealing cover 32. The dust removal scraper 40 is made of hard material and is tightly fitted with the first thread groove on the surface of the lead screw 1. A uniform coating scraper 41 is provided on the inner side of the coating cover 34. The uniform coating scraper 41 is made of flexible material and has a gap with the first thread groove on the surface of the lead screw 1. In the above description, the dust removal scraper 40 is located on the outermost side of the two end caps 3. When the nut 2 moves in a straight line, the side located on the outside of the sealing cap 32 can scrape the first thread groove on the screw 1 that is about to pass inside the nut 2, removing dust and debris from the surface and preventing dust from entering the second thread groove inside the nut 2. The side located on the inside of the sealing cap 32 can scrape the grease in the first thread groove, allowing the grease to accumulate at the oil reservoir cap 33 and reducing the rate of grease consumption. At the same time, when the nut 2 moves in a straight line, the even coating scraper 41 located on the inside of the coating cap 34 can evenly coat the grease remaining between the oil reservoir cap 33 and the first thread groove. Since there is a gap between the even coating scraper 41 and the first thread groove on the surface of the screw 1, the thickness of the grease remaining in the first thread groove after the grease is applied is uniform, resulting in better lubrication.

[0017] Please refer to the following: Figure 1 and Figure 3As shown, the nut 2 includes a movable table 21. The inner wall of the movable table 21 is provided with a second thread groove, and the second thread groove on the inner wall of the movable table 21 corresponds to the first thread groove provided on the surface of the lead screw 1. The first thread groove and the second thread groove together form a rolling groove. A circuit pipe is provided inside the movable table 21 and between the two reversers 22. Rolling balls 23 are provided in the rolling groove and the circuit pipe. Reversers 22 are installed at both ends of the movable table 21 and at both ends of the second thread groove. The two reversers 22 are arranged in opposite directions. The rolling groove and the circuit pipe are connected through the two reversers 22. The rolling groove, the two reversers 22 and the circuit pipe together form a circulating raceway. In the above description, the lead screw 1 is driven to rotate, while the nut 2 is restricted from rotating. The force generated by the rotation of the lead screw 1 is transmitted through the rolling balls 23, pushing the nut 2 to move linearly along the lead screw 1. When the nut 2 moves linearly, the rolling balls 23 are rolled and conveyed in the circulating raceway formed by the rolling groove, the two reversers 22 and the circuit pipe. During the rolling, they come into contact with the grease that is evenly applied to the first thread groove by the uniform coating scraper 41, and are evenly applied to each rolling ball 23 and the second thread groove of the moving table 21 during the continuous rolling process.

[0018] The working principle of this utility model is as follows: When grease needs to be replenished, the drive nut 2 moves to the support 11 at the end of the lead screw 1. At this time, the grease injection tube 12 on the support 11 will align with and release the grease injection block 37 at the end of the end cap 3. Squeezing the grease injection block 37 causes the elastic element 38 to contract and slide inward. At this time, the grease injection tube 12, which is connected to the curved grease injection passage 39 on the grease injection block 37, is connected to the oil storage cavity 35 on the oil storage cap 33. Grease is injected into the oil storage cavity 35 through an external device. After the nut 2 moves away from the support 11, the grease injection block 37 returns to its original position under the elasticity of the elastic element 38, and one end of the grease injection block 37 is automatically sealed. One end of the oil reservoir 35 is designed to prevent contamination from entering. When the nut 2 moves, the outermost dust scraper 40 will first contact the first thread groove of the lead screw 1 and scrape off the debris and dust on its surface, thus cleaning it. At the same time, the inner side of the dust scraper 40 will scrape the old grease that is about to be moved out of the nut 2 towards the center when it moves, so that it accumulates in the area of ​​the oil reservoir 33, reducing wear. Meanwhile, when the nut 2 moves, the even coating scraper 41 will evenly apply the grease supplied in the oil reservoir 35 and the accumulated old grease to the first thread groove of the lead screw 1, ensuring that the rolling ball 23 can obtain stable and uniform lubrication.

[0019] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A high-performance ball screw structure for environmental protection equipment, characterized in that: The device includes a lead screw (1) and a nut (2). The nut (2) is mounted on the lead screw (1). Both ends of the nut (2) are equipped with end caps (3). The end caps (3) include an outer ring (31). One end of the outer ring (31) is fixed to one end of the nut (2). The outer ring (31) is provided with a sealing cap (32), an oil storage cap (33), and an application cap (34) in sequence from the outside to the inside. The oil storage cap (33) is provided with an oil storage cavity (35). One end of the oil storage cavity (35) is provided with an oil injection block (37). The other end of the oil storage cavity (35) is located on the inside of the oil storage cap (33) and corresponds to the first thread groove of the lead screw (1). Both ends of the lead screw (1) are provided with supports (11). A grease injection tube (12) is installed on one side of the support (11) at the position corresponding to the oil injection block (37).

2. The high-performance ball screw structure for environmental protection equipment according to claim 1, characterized in that: The sealing cap (32), the oil storage cap (33), and the application cap (34) have sliding grooves (36) inside their tops. The oil injection block (37) is slidably installed inside the sliding groove (36). One end of the oil injection block (37) is provided with a spring groove, and an elastic element (38) is provided in the spring groove. The other end of the oil injection block (37) is provided with a curved oil injection passage (39). When the oil injection block (37) is attached to one end of the application cap (34), one end of the curved oil injection passage (39) is aligned with one end of the oil storage cavity (35). When the oil injection block (37) is attached to one end of the sealing cap (32), one side of the oil injection block (37) blocks one end of the oil storage cavity (35).

3. The high-performance ball screw structure for environmental protection equipment according to claim 1, characterized in that: The inner side of the sealing cover (32) is provided with a dust removal scraper (40), which is made of hard material and is in close contact with the first thread groove on the surface of the lead screw (1).

4. The high-performance ball screw structure for environmental protection equipment according to claim 1, characterized in that: The inner side of the coating cover (34) is provided with a uniform coating scraper (41), which is made of flexible material and has a gap with the first thread groove on the surface of the lead screw (1).

5. The high-performance ball screw structure for environmental protection equipment according to claim 1, characterized in that: The nut (2) includes a movable stage (21), the inner wall of which is provided with a second thread groove, and the second thread groove on the inner wall of the movable stage (21) corresponds to the first thread groove provided on the surface of the lead screw (1), and the first thread groove and the second thread groove together form a rolling groove. A circuit pipe is provided inside the movable stage (21) and between the two reversers (22), and rolling balls (23) are provided in the rolling groove and the circuit pipe.

6. The high-performance ball screw structure for environmental protection equipment according to claim 5, characterized in that: Reversing devices (22) are installed at both ends of the moving stage (21) and at both ends of the second threaded groove. The two reversing devices (22) are arranged in opposite directions. The rolling groove and the loop pipe are connected through the two reversing devices (22). The rolling groove, the two reversing devices (22) and the loop pipe together form a circulating raceway.

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