A dustproof screw slide
By employing a multi-seal structure on the screw slide, the problems of decreased transmission accuracy and shortened lifespan caused by impurity intrusion are solved, enabling stable use under harsh working conditions and making it suitable for cleanrooms and dusty environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Filing Date
- 2025-09-25
- Publication Date
- 2026-07-17
AI Technical Summary
During long-term operation, existing fully enclosed screw slides generate friction between the slider and the base, leading to the expansion of tiny gaps. This allows external impurities such as dust, moisture, and oil to intrude, affecting transmission accuracy and lifespan, making it difficult to meet the requirements for long-term stable use under harsh working conditions.
The system employs a multi-seal structure, including a first seal, a second seal, and a third seal, which are located between the guide slide and the end plate, the side sealing plate, and the motor mounting plate, respectively. Through expansion and contraction and fitting, it prevents impurities from entering and forms a multi-seal effect.
It effectively prevents impurities from entering, maintains transmission accuracy, extends equipment life, and improves production efficiency. It is suitable for cleanrooms or dusty environments.
Smart Images
Figure CN224516442U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of linear transmission equipment, specifically relating to a dustproof screw slide. Background Technology
[0002] Screw slides, as a common mechanical transmission component, are widely used in automation equipment, CNC machine tools, material handling machinery and other fields. They mainly use the rotation of the screw to drive the slider to move linearly along the guide rail, so as to realize the conveying of materials or the positioning of components.
[0003] The fully enclosed screw slide is a highly customized industrial automation linear motion device. Its core feature is that the internal transmission components are protected by a fully enclosed structure, while the ball screw is used to achieve high-precision linear displacement. It adopts a stainless steel strip or aluminum profile shell, and integrates ball screw and guide rail internally. Dust and pollution prevention are achieved through flexible steel strip or sealing ring, making it suitable for cleanrooms or dusty environments.
[0004] However, existing fully enclosed screw slides have significant technical defects: during long-term operation, the relative movement between the slider and the base generates continuous friction, and fluctuations in equipment load easily cause the housing to vibrate, resulting in the gradual formation of tiny gaps between the stainless steel strip / aluminum cover plate and the base shell. These gaps will continue to widen over time, allowing external dust, moisture, oil, and other impurities to penetrate into the housing and adhere to the surfaces of transmission components such as the ball screw and guide rails. On the one hand, these impurities increase transmission resistance and reduce motion accuracy; on the other hand, they accelerate ball screw wear and may even cause ball jamming and component corrosion, requiring shutdown for maintenance in severe cases. This not only shortens the slide's service life but also affects production efficiency, making it difficult to meet the long-term stable use requirements under harsh working conditions.
[0005] To address the aforementioned issues, this application proposes a dustproof screw slide. Utility Model Content
[0006] To address the aforementioned problems in the existing technology, this utility model provides a dustproof screw slide, which is convenient to use and has a good sealing effect.
[0007] To achieve the above objectives, this utility model provides the following technical solution: a dustproof screw slide, comprising an aluminum profile shell, a guide slide slidably assembled within the aluminum profile shell, a slide cover fixed to the top of the guide slide, a motor fixing plate fixed to one end of the aluminum profile shell, and a sealing cover fixed to the motor fixing plate. The aluminum profile shell includes two symmetrically distributed side sealing plates, end plates fixed to both ends of the side sealing plates, and a stainless steel strip fixed to the top of the side sealing plates. The stainless steel strip penetrates the inner space between the guide slide and the slide cover. It also includes a first sealing element, a second sealing element, and a third sealing element. The two first seals are symmetrically distributed and fixed between the guide slide and the end plate. The first seals can extend and retract as the guide slide moves. The second seal is disposed between the two sides of the guide slide and the corresponding side sealing plate, and the second seal is located directly below the connection gap between the stainless steel strip and the side sealing plate; The third sealing element is located between the sealing cover and the motor mounting plate.
[0008] Preferably, both ends of the first sealing member are fixed with retaining rings for fixed connection with the guide slide and the end plate.
[0009] Preferably, the first sealing element is nylon cloth.
[0010] Preferably, the first seal has a spiral folded structure.
[0011] Preferably, the first seal has an accordion-like folded structure.
[0012] Preferably, the first seal is a tapered structure with a gradually changing diameter.
[0013] Preferably, the second seal is a U-shaped rubber component.
[0014] Preferably, the third sealing element is a "V"-shaped rubber component.
[0015] Preferably, a positioning ring is fixed to the outer side of the motor fixing plate, the third sealing element is sleeved on the positioning ring, the sealing cover is sleeved on the positioning ring, and the inner wall of the sealing cover is in contact with the outer wall of the positioning ring.
[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. The first sealing element can extend and retract synchronously with the movement of the guide slide, continuously sealing the area between the guide slide and the end plate (mainly for threaded screw protection) without affecting the flexibility of movement, preventing impurities from entering from this part; 2. The second seal tightly wraps around the connecting edge of the guide slide and the side sealing plate, and the second seal is located directly below the connecting gap between the stainless steel strip and the side sealing plate, further blocking falling impurities; 3. The third sealing element, in conjunction with the inner wall of the sealing cover and the outer wall of the positioning ring, forms a multi-layer seal, which greatly improves the sealing effect at the motor end and prevents impurities from entering.
[0017] Other additional advantages and benefits of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the isometric structure of the first sealing element in this utility model; Figure 3 This is an isometric structural diagram of the present invention after removing the stainless steel strip and the slide cover; Figure 4 This is a schematic diagram of the cooperation structure between the guide slide and the side sealing plate in this utility model; Figure 5 This is an isometric structural diagram of the sealing cover in this utility model.
[0019] In the diagram: 1. Aluminum profile shell; 11. Side sealing plate; 12. End plate; 13. Stainless steel strip; 2. Guide slide; 3. Slide cover; 4. Motor fixing plate; 41. Positioning ring; 5. Sealing cover; 6. First sealing element; 61. Fixing ring; 7. Second sealing element; 8. Third sealing element. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] Please see Figures 1-5 The present invention provides the following technical solution: a dustproof screw slide, comprising an aluminum profile shell 1, a guide slide 2 slidably assembled in the aluminum profile shell 1, a slide cover 3 fixed to the top of the guide slide 2, a motor fixing plate 4 fixed to one end of the aluminum profile shell 1, and a sealing cover 5 fixed to the motor fixing plate 4. The aluminum profile shell 1 includes two symmetrically distributed side sealing plates 11, end plates 12 fixed to both ends of the side sealing plates 11, and a stainless steel strip 13 fixed to the top of the side sealing plates 11. The stainless steel strip 13 passes through the inner space between the guide slide 2 and the slide cover 3. It also includes a first sealing element 6, a second sealing element 7, and a third sealing element 8.
[0022] Furthermore, by Figures 1-5As shown, in this embodiment, two first seals 6 are symmetrically distributed and fixed between the guide slide 2 and the end plate 12. The first seals 6 can extend and retract with the movement of the guide slide 2. The second seals 7 are located between the two sides of the guide slide 2 and the corresponding side sealing plates 11, and the second seals 7 are located directly below the connection gap between the stainless steel strip 13 and the side sealing plates 11. The third seals 8 are located between the sealing cover 5 and the motor fixing plate 4. With the above scheme, when the dustproof screw slide is put into use, the motor is fixed on the motor fixing plate 4 as a power source. Its output shaft is connected to the screw inside the slide through a transmission device (such as a synchronous pulley and synchronous belt). When the motor is powered on and started, the power is transmitted to the screw through the transmission device, which drives the screw to rotate stably around its own axis.
[0023] Since the guide slide 2 is slidably assembled inside the aluminum profile shell 1, and its interior is provided with an internal thread structure that is compatible with the screw, the rotational motion of the screw can be converted into the linear reciprocating motion of the guide slide 2 along the length direction of the aluminum profile shell 1 through thread engagement, thereby driving the slide cover 3 fixed at the top of the guide slide 2 to move synchronously, so as to realize the linear conveying function of the slide table to the load.
[0024] During this process, the dustproof structure functions simultaneously: Firstly, two symmetrically distributed first sealing elements 6 are fixed between the guide slide 2 and the end plate 12. Since the guide slide 2 changes its distance from the end plate 12 as it moves, and the first sealing elements 6 have telescopic characteristics, their length can be adjusted in real time according to the displacement of the guide slide 2, always sealing the gap between the guide slide 2 and the end plate 12, thus providing better protection for the internal screw. Secondly, the second sealing elements 7 are located at the connection points between the guide slide 2 and the corresponding side sealing plates 11 on both sides, and are precisely positioned within the stainless steel strip. Directly below the connection gap between the 13 and the side sealing plate 11, the connection gap can be sealed to prevent dust from seeping in from the assembly gap between the side sealing plate 11 and the guide slide 2, and from the connection between the stainless steel strip 13 and the side sealing plate 11; thirdly, the third sealing element 8 is assembled between the sealing cover 5 and the motor fixing plate 4. The sealing cover 5 can protect the motor and the end of the screw, while the third sealing element 8 can eliminate the gap between the sealing cover 5 and the motor fixing plate 4, blocking dust from entering the transmission connection area between the motor and the screw, and avoiding dust from affecting the transmission accuracy or causing component wear.
[0025] Meanwhile, the stainless steel strip 13 at the top of the aluminum profile shell 1 passes through the inner space of the guide slide 2 and the slide cover 3. When the guide slide 2 moves the slide cover 3, the inner side of the slide cover 3 always stays in contact with the stainless steel strip 13, and the stainless steel strip 13 continuously covers the top opening of the aluminum profile shell 1. In coordination with the movement trajectory of the slide cover 3, the top of the shell is always sealed to prevent dust from falling directly into the slide table.
[0026] Optionally, by Figures 1-3As shown in this embodiment, both ends of the first sealing member 6 are fixed with fixing rings 61 for fixed connection with the guide slide 2 and the end plate 12. With the above solution, during use, the fixing rings 61 can be rigidly fixed to the side wall of the guide slide 2 and the inner side wall of the end plate 12 by means of bolt tightening or snap-fit, ensuring that the two ends of the first sealing member 6 will not be displaced or loosened due to the operation of the slide.
[0027] When the guide slide 2 moves toward the end plate 12, the fixing ring 61 fixed to the guide slide 2 moves synchronously with the guide slide 2, thereby squeezing the first seal 6 and causing the first seal 6 to contract along the length of the slide. Conversely, when the guide slide 2 moves away from the end plate 12, the fixing ring 61 pulls the first seal 6 to extend. The first seal 6 always maintains stable positions at both ends and will not experience seal offset due to loose connection. It always fits tightly against the inner wall of the gap between the guide slide 2 and the end plate 12.
[0028] Optionally, by Figures 1-3 As shown in this embodiment, the first sealing element 6 is nylon cloth. After adopting the above solution, the nylon cloth has excellent flexibility and elasticity when in use. It can be smoothly contracted along the length of the slide table, and the surface remains flat during the contraction process without wrinkles accumulating.
[0029] When the guide slide 2 moves away from the end plate 12, the fixing ring 61 pulls the nylon cloth to stretch. The elasticity of the nylon cloth allows it to quickly return to a flat state, tightly covering the gap between the guide slide 2 and the end plate 12, and avoiding dustproof gaps due to untimely stretching.
[0030] In addition, the nylon fabric has a dense fiber structure and good dustproof barrier properties, which can effectively prevent external dust and debris from entering the aluminum profile shell 1 through the gap between the guide slide 2 and the end plate 12.
[0031] Optionally, by Figures 1-3 As shown in this embodiment, the first sealing element 6 has a spiral folding structure. With the above solution, when the guide slide 2 moves closer to the end plate 12 during use, the fixing ring 61 connected to the guide slide 2 pushes the first sealing element 6 to contract. At this time, the spiral folding structure rotates inward along the central axis, and the folded layers fit together and are stacked in an orderly manner, avoiding the sealing gap caused by disordered wrinkles. Conversely, when the guide slide 2 moves away from the end plate 12, the fixing ring 61 pulls the first sealing element 6 to extend, and the spiral folding structure gradually rotates open along the axial direction. Each folded layer unfolds evenly, so that the surface of the nylon cloth always remains flat and taut, tightly covering the gap between the guide slide 2 and the end plate 12.
[0032] Optionally, by Figures 1-3As shown in this embodiment, the first sealing member 6 has an accordion-shaped folding structure. After adopting the above solution, when in use, the accordion-shaped folding structure of the first sealing member 6 is periodically corrugated between the two fixing rings 61, and the folding layers are evenly arranged along the length direction of the slide.
[0033] When the guide slide 2 moves closer to the end plate 12, the fixing ring 61 connected to the guide slide 2 advances synchronously, forming an axial compression on the accordion-shaped folded structure. At this time, each folded layer will stack in an orderly manner along the corrugated trajectory, and the inner sidewalls of adjacent folded layers will fit tightly together. This avoids sealing gaps caused by disordered wrinkles and can also buffer the compressive stress through the stacking of folded layers, reducing local wear of the nylon cloth material. Conversely, when the guide slide 2 moves away from the end plate 12, the fixing ring 61 will pull the accordion-shaped folded structure to extend, and each folded layer will be evenly spread along the corrugated trajectory, keeping the nylon cloth flat and taut, tightly covering the gap between the guide slide 2 and the end plate 12. During the extension process, the supporting effect of the folded layers can prevent the first sealing element 6 from sagging due to its own weight or airflow.
[0034] Preferably, by Figures 1-3 As shown in this embodiment, the first sealing element 6 is a tapered structure with a gradually changing diameter. After adopting the above scheme, when in use, the tapered structure of the first sealing element 6 exhibits a gradually changing diameter characteristic along the length of the slide: the end closer to the guide slide 2 has a larger (or smaller) diameter, which matches the side wall size of the guide slide 2; the end closer to the end plate 12 has a smaller (or larger) diameter, which matches the installation space inside the end plate 12. The two ends are rigidly positioned by the fixing ring 61 to ensure that the tapered generatrix always remains parallel to the inner side wall of the aluminum profile shell 1.
[0035] When the guide slide 2 moves closer to the end plate 12, the fixing ring 61 connected to the guide slide 2 advances synchronously, pushing the conical structure to contract axially. Due to the gradual change in diameter, during the contraction process, the outer layer (large diameter side) of the conical structure will naturally wrap around the inner layer (small diameter side), forming an orderly nested fold, avoiding sealing gaps caused by disordered wrinkles, and the nested surfaces fit tightly, effectively preventing dust from entering from the gaps between the layers; conversely, when the guide slide 2 moves away from the end plate 12, the fixing ring 61 pulls the conical structure to extend. The design of the gradual change in diameter makes each part unfold evenly along the axial direction, with the small diameter end stretching first, followed by the large diameter end, and the whole maintaining the conical contour unchanged, ensuring the fit with the inner wall of the aluminum profile shell 1, and preventing the sealing surface from separating due to excessive local stretching.
[0036] Optionally, by Figure 1 , Figure 2 and Figure 4As shown in this embodiment, the second sealing member 7 is a "U"-shaped rubber component. After adopting the above scheme, when in use, the "U"-shaped rubber component of the second sealing member 7 is installed at the connection between the guide slide 2 and the corresponding side sealing plate 11 with the opening facing the side sealing plate 11 (or other orientations).
[0037] To prevent dust from seeping in through the assembly gap between the side sealing plate 11 and the guide slide 2, and the joint between the stainless steel strip 13 and the side sealing plate 11.
[0038] Optionally, by Figure 1 , Figure 2 and Figure 5 As shown in this embodiment, the third sealing element 8 is a "V" shaped rubber component. After adopting the above scheme, when in use, the "V" shaped rubber component of the third sealing element 8 is clamped between the end face of the sealing cover 5 and the outer wall of the motor fixing plate 4 with the opening facing the transmission area (the connection between the motor output shaft and the screw). The rubber wings on both sides are tightly fitted to the end face of the sealing cover 5 and the outer wall of the motor fixing plate 4, respectively.
[0039] Eliminate the gap between the sealing cover 5 and the motor mounting plate 4 to prevent dust from entering the transmission connection area between the motor and the screw, thus avoiding dust affecting transmission accuracy or causing component wear.
[0040] Preferably, by Figure 1 , Figure 2 and Figure 5 As shown in this embodiment, a positioning ring 41 is fixed to the outer side of the motor fixing plate 4, a third sealing member 8 is sleeved on the positioning ring 41, and a sealing cover 5 is sleeved on the positioning ring 41. The inner wall of the sealing cover 5 is in contact with the outer wall of the positioning ring 41. With the above solution, during use, the positioning ring 41 is rigidly connected to the outer side of the motor fixing plate 4 by bolts. After assembly, the end face of the sealing cover 5 will form radial compression on the outer wing of the third sealing member 8, causing the "V"-shaped rubber component to undergo elastic deformation. The inner wing will further adhere to the outer wall of the positioning ring 41, while the outer wing will tightly adhere to the end face of the sealing cover 5 to form a seal.
[0041] Components not described in detail in this article are existing technologies.
[0042] The working principle and usage process of this utility model: The dustproof screw slide of this utility model has a motor as the power source fixed on the motor fixing plate 4. Its output shaft is connected to the screw inside the slide through a transmission device (such as a synchronous pulley and synchronous belt). When the motor is powered on and started, the power is transmitted to the screw through the transmission device, which drives the screw to rotate stably around its own axis. The guide slide 2 is slidably assembled inside the aluminum profile shell 1, and its interior is provided with an internal thread structure that is compatible with the screw. The rotational motion of the screw can be converted into the linear reciprocating motion of the guide slide 2 along the length of the aluminum profile shell 1 through thread engagement, thereby driving the slide cover 3 fixed at the top of the guide slide 2 to move synchronously, so as to realize the linear conveying function of the slide table to the load. During this process, the dustproof structure also plays a role: Firstly, two symmetrically distributed first sealing elements 6 are fixed between the guide slide 2 and the end plate 12. As the guide slide 2 moves, the distance between it and the end plate 12 will change. The first sealing element 6 has telescopic characteristics and can adjust its length in real time with the displacement of the guide slide 2, thus always sealing the gap between the guide slide 2 and the end plate 12 and providing better protection for the internal screw. Secondly, the "U"-shaped rubber component of the second sealing element 7 is installed at the connection between the guide slide 2 and the corresponding side sealing plate 11 with the opening facing the side sealing plate 11 (or other orientations), and is located directly below the connection gap between the stainless steel strip 13 and the side sealing plate 11. This can seal the connection gap and prevent dust from seeping in from the assembly gap between the side sealing plate 11 and the guide slide 2, as well as the connection between the stainless steel strip 13 and the side sealing plate 11. Thirdly, the "V"-shaped rubber component of the third seal 8 is clamped between the end face of the sealing cover 5 and the outer wall of the motor fixing plate 4 with the opening facing the transmission area (the connection between the motor output shaft and the screw). The sealing cover 5 can protect the motor and the end of the screw, while the third seal 8 can eliminate the gap between the sealing cover 5 and the motor fixing plate 4, preventing dust from entering the transmission connection area between the motor and the screw, and avoiding dust from affecting the transmission accuracy or causing component wear.
[0043] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A dustproof screw slide, comprising an aluminum profile shell (1), a guide slide (2) slidably assembled within the aluminum profile shell (1), a slide cover (3) fixed to the top of the guide slide (2), a motor fixing plate (4) fixed to one end of the aluminum profile shell (1), and a sealing cover (5) fixed to the motor fixing plate (4), wherein the aluminum profile shell (1) comprises two symmetrically distributed side sealing plates (11), end plates (12) fixed to both ends of the side sealing plates (11), and a stainless steel strip (13) fixed to the top of the side sealing plates (11), wherein the stainless steel strip (13) penetrates the inner space of the guide slide (2) and the slide cover (3), characterized in that, It also includes a first seal (6), a second seal (7) and a third seal (8); Two first seals (6) are symmetrically distributed and fixed between the guide slide (2) and the end plate (12). The first seals (6) can extend and retract as the guide slide (2) moves. The second sealing element (7) is disposed between the two sides of the guide slide (2) and the corresponding side sealing plate (11), and the second sealing element (7) is located directly below the connection gap between the stainless steel strip (13) and the side sealing plate (11); The third sealing element (8) is located between the sealing cover (5) and the motor fixing plate (4).
2. The dustproof screw slide according to claim 1, characterized in that: Both ends of the first sealing member (6) are fixed with fixing rings (61) for fixed connection with the guide slide (2) and the end plate (12).
3. The dustproof screw slide table according to claim 1, characterized in that: The first sealing element (6) is made of nylon cloth.
4. The dustproof screw slide according to claim 1, characterized in that: The first seal (6) has a spiral folded structure.
5. A dustproof screw slide according to claim 1, characterized in that: The first seal (6) has an accordion-like folded structure.
6. A dustproof screw slide according to claim 1, characterized in that: The first sealing element (6) is a tapered structure with a gradually changing diameter.
7. A dustproof screw slide according to claim 1, characterized in that: The second seal (7) is a "U" shaped rubber component.
8. A dustproof screw slide according to claim 1, characterized in that: The third sealing element (8) is a "V" shaped rubber component.
9. A dustproof screw slide according to claim 1, characterized in that: The outer side of the motor fixing plate (4) is fixed with a positioning ring (41), the third sealing element (8) is sleeved on the positioning ring (41), the sealing cover (5) is sleeved on the positioning ring (41), and the inner wall of the sealing cover (5) is in contact with the outer wall of the positioning ring (41).