Spiral dustproof component of ball screw

Abstract

The utility model relates to the technical field of ball screws, in particular to a screw type dustproof component of a ball screw, the ball screw comprises a screw and a nut in threaded fit with the screw, the screw type dustproof component is arranged at the end of the nut and located between the nut and the screw, and the screw type dustproof component comprises a lip part and a dustproof part. The inner circle of the lip part is in a thread shape, and the lip part is matched with the thread on the lead screw; the connecting part is arranged on the periphery of the lip part, a plurality of limiting grooves are formed in the outer edge of the connecting part in the circumferential direction of the connecting part, and the number of the limiting grooves is plural; and the bolt is arranged on the nut, and the bolt penetrates through the nut and is clamped in the limiting groove. According to the spiral dustproof component, the annular design is adopted, the clamping grooves which are evenly distributed and identical in shape and size are formed in the outer circumferential face of the spiral dustproof component, and the spiral dustproof component can be stably installed and accurately positioned due to the arrangement of the clamping grooves, so that the dustproof capacity of the spiral dustproof component is brought into full play.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ball screw, in particular to a spiral dustproof component of ball screw. BACKGROUND

[0002] For ball screw, there are two common dustproof components, one is to achieve dustproof effect through cooperation between dustproof ring and spring clamp, spring clamp presses dustproof ring to prevent circumferential and axial movement of dustproof ring, spring clamp is a customized product, and the precision of stamping forming process is not high, the cost is relatively high, and the spring clamp slot part needs to be processed with certain precision to meet the ideal cooperation requirement, which increases the production and processing cost, and the spring clamp will be loose when the ball screw runs for a long time, reducing the reliability of the product, and the other is to fix the dustproof component with a set screw, which needs to add a set screw mounting hole during later assembly, so as to form a set of mounting holes on the nut and the dustproof ring, which is low in assembly efficiency, and the positioning hole of the set screw is difficult to align with the mounting hole during secondary installation, which is not accurate in positioning, causing the dustproof component to be unstable and reducing the dustproof performance. In summary, the two common dustproof rings are difficult to balance the production cost and assembly efficiency. CONTENT OF THE UTILITY MODEL

[0003] The technical problem to be solved by the present application is that the existing dustproof ring is difficult to balance the production cost and assembly efficiency.

[0004] Therefore, the utility model provides a spiral dustproof component of ball screw.

[0005] The technical scheme adopted by the utility model to solve the technical problem is:

[0006] A spiral dustproof component of ball screw, the ball screw comprises a screw rod, a nut matched with the screw rod in screw thread, the spiral dustproof component is arranged at the end of the nut and located between the nut and the screw rod, and the spiral dustproof component comprises,

[0007] A lip part, the lip part is arranged in a ring shape, the inner circle of the lip part is arranged in a threaded shape, and the lip part is matched with the screw thread on the screw rod;

[0008] A connecting part, the connecting part is arranged at the periphery of the lip part, the outer edge of the connecting part is provided with a plurality of limiting grooves along the circumference thereof, and the number of the limiting grooves is plural;

[0009] A bolt, the bolt is arranged on the nut and clamped in the limiting groove through the nut.

[0010] Further, a gap is arranged between the inner circle of the lip part and the channel part of the screw rod, and the distance of the gap is S.

[0011] Further, the minimum number N of the limiting grooves, the lead Ph and the gap S between the lip of the helical dustproof component and the screw channel part satisfy the relationship: Ph / 2N≤S.

[0012] Further, the limiting groove is arranged as a U-shaped groove.

[0013] Further, the limiting groove is arranged as a counterbore.

[0014] Further, the thread-shaped inner circle of the lip adopts a normal Gothic double circular-arc tooth profile.

[0015] Further, the end face of the nut is provided with a mounting groove for mounting the helical dustproof component.

[0016] Further, the nut is provided with an oil hole which is in communication with the mounting groove.

[0017] The helical dustproof component has the advantages that the helical dustproof component has a simple structure and is convenient to operate, and the machining and mounting problems are solved, the production efficiency and the mounting efficiency are improved, the use performance is ensured, and the helical dustproof component is more firm and reliable.

[0018] Specifically, the helical dustproof component with a plurality of limiting grooves arranged on the outer side wall is screwed into the bolt in the radial direction to fix the dustproof component, the dustproof component is clamped at the end of the nut, and the axial and circumferential positioning is realized. The dustproof component can be formed by one-time machining, the production time and the production cost are greatly reduced, the assembly is convenient and simple, the mounting positioning precision is high, the production difficulty is greatly reduced, the machining and assembly efficiency is improved, the helical dustproof component is more reliable and safe, deformation does not occur, the dustproof capacity is effectively exerted, the assembly difficulty and the low production and assembly efficiency are solved, and the dustproof property and the stable and reliable operation are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] The helical dustproof component will be further described below in combination with the drawings and embodiments.

[0020] Figure 1 is a structural schematic view of a ball screw with the helical dustproof component in the utility model.

[0021] Figure 2 is a structural schematic view of the assembly relationship between the helical dustproof component and the ball screw in the utility model.

[0022] Figure 3 is a structural schematic view of the helical dustproof component in the utility model.

[0023] Figure 4 is a structural schematic view of the limiting groove in the utility model.

[0024] Figure 5 Figure 5 is a schematic view of the installation position between the screw type dustproof component and the nut in the utility model.

[0025] Figure 6 Figure 6 is a schematic view of the installation structure of the dustproof component in the utility model. Figure 5 Figure 7 is an enlarged view of part A of the dustproof component installation structure in the utility model.

[0026] Figure 7 Figure 8 is a schematic view of the structure of the U-shaped limiting groove in the utility model.

[0027] Figure 8 Figure 9 is a schematic view of the structure of the counterbore-shaped limiting groove in the utility model.

[0028] In the figure: 1, lead screw; 2, nut; 3, nut flange; 4, installation groove; 5, oil hole; 6, threaded through hole; 7, screw type dustproof component; 71, lip; 72, connecting part; 73, limiting groove; 8, bolt. DETAILED DESCRIPTION

[0029] The utility model will be further described in detail in combination with the drawings. These drawings are all simplified schematic views, and only illustrate the basic structure of the utility model in a schematic manner, so they only show the structure related to the utility model.

[0030] In the description of the utility model, it is to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the features limited by "first" and "second" can be explicitly or implicitly included one or more features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0031] In the description of the utility model, it is to be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] A helical dustproof component 7 of a ball screw 1, the ball screw 1 comprising a screw rod 1, a nut 2 and a nut flange 3, the nut 2 being sleeved on the screw rod 1 and forming a helical channel between the screw rod 1 and the nut 2, the helical channel being provided with balls, and the end of the nut 2 being provided with the nut flange 3, in the embodiment, the nut flange 3 is arranged at one end of the nut 2, the end face of the nut flange 3 and the end face of the nut 2 are provided with mounting grooves 4, the mounting grooves 4 are used for mounting the helical dustproof component 7, the bottom surface of the mounting groove 4 is provided as a bonding surface, the nut 2 is provided with an oil hole 5, the oil hole 5 is communicated with the mounting groove 4, and lubrication is facilitated.

[0033] The helical dustproof component 7 is arranged in the mounting groove 4 and sleeved on the screw rod 1. The helical dustproof component 7 is arranged in a circular ring shape and specifically comprises a lip portion 71 and a connecting portion 72, the connecting portion 72 is arranged at the periphery of the lip portion 71, and the connecting portion 72 can be integrally formed with the lip portion 71, the lip portion 71 is arranged in a ring shape, the inner circle of the lip portion 71 is arranged in a threaded shape, and the normal direction adopts a Gothic double circular arc tooth shape, so as to facilitate the machining of the lip portion 71 and the cooperation with the screw rod 1, and in use, the lip portion 71 is accurately matched with the helix of the screw rod 1 shaft through the thread, and is screwed into close contact with the bonding surface on the side of the nut flange 3 and the outer circle side. It should be noted that there is a gap between the inner circle of the lip portion 71 and the channel of the screw rod 1, so as to prevent heat from being generated by the friction between the lip portion 71 and the channel of the screw rod 1.

[0034] The outer edge of the connecting portion 72 is uniformly provided with a plurality of limiting grooves 73 along the axial direction, and the limiting grooves 73 penetrate through one end of the connecting portion 72 away from the center of the nut 2. The outer side wall of the nut flange 3 and the nut 2 is provided with a threaded hole 6, the number of the threaded hole 6 is arranged to be at least two, and the threaded hole 6 is arranged without phase relationship with the helix, so the threaded hole 6 can be arranged in any direction in the circumference. After the dustproof component is screwed into the nut flange 3 and the nut 2 through the thread on the lip portion 71, the threaded hole 6 is opposite to the limiting groove 73, an inner hexagonal bolt 8 is screwed into the threaded hole 6, and the inner hexagonal bolt 8 is inserted into the limiting groove 73, so as to realize the fixed installation of the dustproof component.

[0035] Specifically, the limiting groove 73 can be U-shaped, when the wall thickness of the nut 2 is relatively thick, the U-shaped limiting groove 73 is used to ensure the fixing effect, and the a small drawing in FIG. 1 and the b small drawing in FIG. 2 are the side view of the U-shaped limiting groove 73 and the schematic diagram of the assembly relationship between the bolt 8 and the U-shaped limiting groove 73. When the wall thickness is relatively thin, the length of the set bolt 8 cannot be satisfied, and the counterbore-shaped limiting groove 73 can be used to achieve the fixing purpose, and the a small drawing in FIG. 3 and the b small drawing in FIG. 4 are the side view of the counterbore-shaped limiting groove 73 and the schematic diagram of the assembly relationship between the bolt 8 and the counterbore-shaped limiting groove 73. Figure 7 Figure 7 Figure 8 Figure 8 ​​​​

[0036] It should be noted that the number of limiting grooves 73 is even, and the minimum number N of limiting grooves 73 is related to the pitch Ph and the gap S between the lip 71 of the dustproof component 7 and the channel of the lead screw 1, and the relationship is Ph / 2N≤S. In order to simplify the design of the nut 2 and reduce the processing difficulty, the position of the limiting groove 73 is not phase-related to the thread of the nut 2, thereby simplifying the product design and production difficulty of the nut 2, and greatly improving the applicability. Therefore, the utility model can meet the needs in different use scenarios. In the early design stage, the number of limiting grooves 73 in the circumferential direction is considered, the maximum adjustment angle is 360 / 2N, the conversion axial distance is Ph / 2N, and when Ph / 2N≤S, the lip 71 of the dustproof component and the channel of the lead screw 1 will not interfere.

[0037] Through this formula, the minimum value (taking complex number) of the number of limiting grooves 73 can be obtained. Since the number of limiting grooves 73 is determined in relation to the gap S, and the thread through hole 6 is not phase-related to the spiral line, the thread through hole 6 can be set in any direction in the circumference, so only the total number of limiting grooves 73 needs to be determined. The thread through hole 6 enables the hexagonal head bolt 8 to better cooperate with the limiting groove 73, and better play a fixing role.

[0038] The implementation principle of the present application is:

[0039] The lip of the spiral dustproof component 7 is accurately matched with the spiral of the lead screw 1, and is screwed into the mounting groove 4, so that the spiral dustproof component 7 abuts against the joint surface. The thread through hole 6 is screwed into the nut 2 and inserted into the limiting groove 73 by the hexagonal bolt 8, thereby realizing firm locking of the spiral dustproof component 7, ensuring that the spiral dustproof component 7 cannot move axially and radially, and further improving the stability and dustproofness of the overall structure.

[0040] The present application realizes sealing cooperation with the lead screw 1 by setting the lip 71 of the threaded inner circle, and realizes quick connection with the nut flange 3 and the nut 2 by setting the limiting groove 73 on the outer edge of the connecting part 72. The present application is simple in design and convenient to operate. Only the utility model needs to be screwed into the lead screw 1 shaft, and the joint surfaces at both ends of the nut 2 are tightly attached, so as to realize axial and circumferential positioning.

[0041] When installing the new spiral dustproof component 7, since the thread through hole 6 is not phase-related to the spiral line, the thread through hole 6 can be set in any direction in the circumference, and the installation is also very convenient. When the joint surfaces at both ends of the spiral dustproof component 7 and the nut 2 are tightly attached, the axial and circumferential positions of the spiral dustproof component 7 are limited and cannot be moved. At this time, the hexagonal head bolt 8 and the limiting groove 73 can be completely fixed by cooperation.

[0042] Compared with the mode that the dustproof ring and the spring buckle or the bolt 8 are directly fixed on the dustproof part, the manufacturing cost is greatly reduced, the reliability is greatly improved, the production efficiency and the installation efficiency are improved, the dustproof performance is greatly improved, the dustproof performance is greatly improved.

[0043] In addition, the new spiral dustproof part 7 faces the diversified lead screw 1 specifications and the nut 2 outer diameter size, and the installed bolt 8 selects the standard size specification.

[0044] Through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the utility model. The technical scope of the utility model is not limited to the content in the specification, and must be determined by the scope of claims.

Claims

1. A helical dustproof component for a ball screw, wherein the ball screw (1) comprises a screw (1) and a nut (2) threadedly engaged with the screw (1), characterized in that, The spiral dustproof component (7) is disposed at the end of the nut (2) and located between the nut (2) and the lead screw (1). The spiral dustproof component (7) includes, The lip (71) is set as an annular shape, the inner circle of the lip (71) is set as a thread, and the lip (71) is adapted to the thread on the lead screw (1); A connecting part (72) is provided around the lip (71). The outer edge of the connecting part (72) is provided with a plurality of limiting grooves (73) along its circumferential direction. The number of limiting grooves (73) is multiple. Bolt (8) is set on nut (2) and the bolt (8) passes through nut (2) and is locked in limiting groove (73).

2. The helical dustproof component of the ball screw according to claim 1, characterized in that, A gap is provided between the inner circle of the lip (71) and the groove of the lead screw (1), and the gap distance is S.

3. The helical dustproof component of the ball screw according to claim 2, characterized in that, The minimum number N of the limiting groove (73), the lead Ph, and the gap S between the lip (71) of the spiral dustproof component (7) and the channel of the lead screw (1) satisfy the following relationship: Ph / 2N≤S.

4. The helical dustproof component of the ball screw according to claim 1, characterized in that, The limiting groove (73) is configured as a U-shaped groove.

5. The helical dustproof component of the ball screw according to claim 1, characterized in that, The limiting groove (73) is configured as a countersunk hole.

6. The helical dustproof component of the ball screw according to claim 1, characterized in that, The threaded inner circle of the lip (71) adopts a Gothic double circular arc tooth profile in the normal direction.

7. The helical dustproof component of the ball screw according to claim 1, characterized in that, The end face of the nut (2) is provided with a mounting groove (4) for installing a spiral dustproof component (7).

8. The helical dustproof component of the ball screw according to claim 7, characterized in that, The nut (2) is provided with an oil hole (5), which is connected to the mounting groove (4).

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