Combined dustproof device for ball screw pair
By designing a combined dustproof device, using self-locking and convex spiral raceway design, combined with polytetrafluoroethylene and aluminum bronze materials, the problem of debris intrusion during operation of the ball screw pair is solved, and effective dustproofing is achieved and dust removal effect extends service life and reduces noise.
Patent Information
- Application Number
- CN202420647494.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-01
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-04-01
AI Technical Summary
During operation, the existing ball screw pair is easily invaded by dust, powder, iron filings and other debris, resulting in faster wear and shorter service life. The existing dust ring material is insufficient in strength, making it difficult to effectively resist hard debris.
A combined dust-proof device is designed, including a dust-proof coil body and a dust-proof coil body. Both are formed by matching designs of self-locking grooves and lugs, annular grooves and bosses, combining ball screws and ball nuts. The convex spiral raceway is made of polytetrafluoroethylene and aluminum bronze or steel to ensure sealing and durability.
It effectively prevents dust, powder, iron filings and other debris from entering the ball screw pair, extends service life, reduces noise, and provides dual effects of dust removal and dust prevention, and has a simple structure and low cost.
Smart Images
Figure CN222229334U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of ball screw pairs, and in particular relates to a combined dust-proof device for a ball screw pair. Background Art
[0002] Since the outer surface of the ball screw pair is provided with a spiral raceway for the rolling of the balls, during the operation of the existing ball screw pair, dust, powder, iron filings, debris and other debris are easily caused to enter the spiral raceway of the ball screw and the ball nut, which is easy to cause a gap between the ball nut and the ball screw, affecting the normal operation of the balls and easily causing premature damage to the ball screw pair. At the same time, the wear of the ball screw and the ball nut is increased, which is easy to cause the heating life of the screw to be shortened.
[0003] Under the condition that the ball screw pair has dust-proof requirements, the ball screw pair will generally be equipped with a soft dust ring at both ends of the ball nut. The dust ring material is polytetrafluoroethylene, which is used to prevent dust, powder, debris and other debris from entering the ball screw and ball nut spiral raceway. However, this material has low strength and is easily damaged when encountering hard iron filings and other debris, which can easily cause premature damage to the ball screw pair. Utility Model Content
[0004] The purpose of the utility model is to provide a combined dustproof device for a ball screw pair, which is in close contact with the spiral track of the ball screw, the outer circle of the ball screw and the ball nut, and is used to effectively prevent dust, powder, iron filings, debris and other debris from entering the ball screw pair to meet the use requirements.
[0005] The technical solution of the utility model is a combined dust-proof device for a ball screw pair, comprising a ball screw and a ball nut, and is characterized in that it also includes a dust-proof ring body and a dust-removing ring body; convex spiral raceways matching the size and shape of the ball screw thread track are respectively provided inside the dust-proof ring body and the dust-removing ring body; self-locking grooves are respectively provided on the left and right end faces of the ball nut; an annular groove is opened on the outer edge surface of the dust-proof ring body, and an annular boss is provided on the outer edge of the dust-removing ring body, and the annular groove is fit with the annular boss, so that the dust-proof ring body and the dust-removing ring body are connected as a whole to form a combined dust-proof device.
[0006] Furthermore, two self-locking lugs are provided on the end face of the dust removal ring body, and the two self-locking lugs provided on the dust removal ring body are fitted with the self-locking grooves on the left and right end faces of the ball nut to achieve self-locking and control the circumferential movement of the dust prevention ring body and the dust removal ring body.
[0007] Furthermore, the number, shape and size of the annular groove and the annular boss match each other.
[0008] The utility model has the following beneficial effects:
[0009] 1. After the dustproof device of the utility model is assembled, the self-locking effect prevents the dustproof device from moving circumferentially and has elasticity. The convex raceway thread design of the ball screw pair combined dustproof device combines the top diameter of the raceway with the bottom diameter of the screw. By fitting the screw raceway flange, powder, iron filings, debris, etc. cannot enter the nut raceway. The dustproof effect is good, the production cost is low, the structure is simple, and the assembly is convenient. The dual effects of chip removal (hard debris such as iron filings) and dustproof can be achieved at the same time.
[0010] 2. The utility model provides a combined dustproof device for a ball screw pair. The dustproof ring and the dust removal ring are installed together. The dust removal ring body is made of aluminum bronze or steel, which can effectively prevent and resist large particles, iron filings, debris and other debris from entering the ball screw pair; the dustproof ring body is made of polytetrafluoroethylene / polyoxymethylene material; it can effectively prevent and resist dust, powder, debris and other debris from entering the ball screw pair. It also protects the ball screw pair from damage by debris to the raceway, and increases the service life of the ball screw pair.
[0011] 3. In the utility model, the inner sides of the dustproof ring body and the dust removal ring body are provided with convex raceway threads, which can ensure that the dust removal ring body, the de-icing ring body are in close contact with the ball screw thread track and the outer circle of the ball screw, effectively preventing external powder, iron filings, debris and other debris from entering the ball screw pair, enhancing the dust removal sealing effect and the service life of the ball screw pair.
[0012] 4. The dust ring body of the utility model is made of polytetrafluoroethylene / polyformaldehyde material, and the dust removal ring body is made of aluminum bronze or steel material, which prevents the end face of the ball nut of the ball screw pair from directly colliding with foreign objects during operation, and absorbs the vibration caused by the collision with foreign objects during the movement of the ball screw pair, thereby reducing the generation of noise. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a structural diagram of the utility model ball screw pair combined dustproof device;
[0014] Figure 2 It is a schematic diagram of the ball nut of the utility model;
[0015] Figure 3 This is a schematic diagram of the dustproof ring body of the utility model;
[0016] Figure 4 This is a schematic diagram of the dust removal ring body of the utility model;
[0017] Figure 5 This is a schematic diagram of the annular groove of the dustproof ring body of the utility model;
[0018] Figure 6 yes Figure 5 Side view of
[0019] Figure 7 It is a schematic diagram of the annular boss and the self-locking lug of the dust removal ring body of the utility model;
[0020] Figure 8 yes Figure 7 Side view of
[0021] Explanation of the accompanying drawings: 1-ball screw; 2-ball nut; 3-dust ring body; 4-dust removal ring body; 5-self-locking groove on the left end face of the ball nut; 6-self-locking groove on the right end face of the ball nut; 7-convex spiral raceway matching the dust ring body and the ball screw; 8-convex spiral raceway matching the dust removal ring body and the ball screw; 9-annular groove; 10-annular boss; 11-self-locking lug. DETAILED DESCRIPTION
[0022] like Figures 1 to 8 As shown, the present embodiment discloses a ball screw pair combined dustproof device, comprising a ball screw 1, a ball nut 2, a dustproof ring body 3 and a dust removal ring body 4, a ball nut left end face self-locking groove 5 is provided on the left end face of the ball nut, and a ball nut right end face self-locking groove 6 is provided on the right end face of the ball nut.
[0023] The dust ring body 3 is provided with a convex raceway thread 7 that matches the size and shape of the ball screw 1 thread track, and the dust removal ring body 4 is provided with a convex raceway thread 8 that matches the size and shape of the ball screw 1 thread track. The dust ring body 3 and the dust removal ring body 4 can both be completely fitted to the ball screw spiral raceway surface.
[0024] The outer edge surface of the dustproof ring body is provided with an annular groove 9, and the outer edge surface of the dust removal ring 4 body is provided with an annular boss 10. The number, shape and size of the annular grooves 9 and the annular boss 10 match each other. The annular grooves 9 and the annular boss 10 are fitted together to connect the dustproof ring body 3 and the dust removal ring body 4 into a whole.
[0025] The dustproof ring body 3 and the dust removal ring body 4 connected as a whole are screwed into the ball screw 1 as a whole and assembled at both ends of the ball nut. The convex raceway threads of the dustproof ring body 3 and the dust removal ring body 4 are completely fitted into the spiral raceway of the ball screw 1.
[0026] The dust-removing ring body 4 is provided with two self-locking lugs 11 on its end face, and the two self-locking lugs 11 on the dust-removing ring body 4 are fitted into two self-locking grooves on the left and right end faces of the ball nut 2 to achieve self-locking and control the circumferential movement of the dust-proof ring body 3 and the dust-removing ring body 4.
[0027] The above is only a specific implementation of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Any changes or replacements that can be easily thought of by any technician familiar with the field within the technical scope disclosed in the utility model should be covered within the scope of protection of the utility model.
Claims
1. A ball screw assembly dust prevention device, comprising a ball screw (1) and a ball nut (2), characterized in that The invention also comprises a dustproof ring body (3) and a dust removal ring body (4); convex spiral raceways matching the size and shape of the ball screw thread track are respectively provided inside the dustproof ring body and the dust removal ring body; self-locking grooves are respectively provided on the left and right end faces of the ball nut; an annular groove (9) is provided on the outer edge surface of the dustproof ring body (3), and an annular boss (10) is provided on the outer edge of the dust removal ring body (4); the annular groove (9) and the annular boss (10) are fitted together, so that the dustproof ring body (3) and the dust removal ring body (4) are connected as a whole to form a combined dustproof device.
2. A ball screw assembly dust prevention device as claimed in claim 1, characterized in that: Two self-locking lugs (11) are provided on the end surface of the dust collecting ring body (4), and the two self-locking lugs (11) provided on the dust collecting ring body (4) are fitted into the self-locking grooves on the left and right end surfaces of the ball nut (2), thereby achieving self-locking and controlling the circumferential movement of the dust collecting ring body (3) and the dust collecting ring body (4).
3. A ball screw assembly dust prevention device as claimed in claim 2, characterized in that: The number, shape and size of the annular groove (9) and the annular boss (10) match each other.