High-rigidity integrated sealing end cover and ball screw pair with same

Abstract

The utility model relates to the technical field of sealing parts, in particular to a high-rigidity integrated sealing end cover and a ball screw pair with the high-rigidity integrated sealing end cover, the ball screw pair comprises a ball screw and a ball nut, a spiral passage is formed between the ball nut and the ball screw, and a steel ball is arranged in the spiral passage; the end part of the ball nut is provided with a circulating part for guiding the circulation of the balls; the high-rigidity integrated sealing end cover is arranged at the end of the ball nut in a covering mode, the circulating part is pressed between the ball nut and the high-rigidity integrated sealing end cover, the high-rigidity integrated sealing end cover comprises a metal sealing gland and a sealing film, and the sealing film is arranged at the end, facing the ball nut, of the metal sealing gland; and the supporting part is arranged on the metal sealing gland, and the supporting part provides support for the metal sealing gland to prevent the metal sealing gland from deforming. The supporting part is additionally arranged in the metal sealing gland, so that the overall rigidity is improved, the pressure generated during screw fastening is effectively resisted, and the deformation caused by low sealing rigidity of a resin film is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of sealing components, and in particular, to a highly rigid integrated sealing end cover and a ball screw pair having the same. Background Art

[0002] Due to different usage scenarios of precision transmission components, the requirements for their additional performance are also different. For some usage environments with high dust and many pollutants, reasonable and effective sealing components are essential.

[0003] The existing end cover seals are divided into split type and integrated type. The split type end cover seal is usually composed of a resin sealing film and several metal sealing gaskets (covers) stacked layer by layer. Among them, the sealing film plays a sealing role, and the metal sealing gasket is the bearing surface and fastening surface of the sealing film. Because of its many components, its manufacturing cost is high, the manufacturing process is cumbersome, the assembly efficiency is low, and the assembly accuracy cannot be controlled. For the integrated end cover seal, the resin sealing film and the metal sealing gasket are solidified into one body, effectively solving the above problems. However, due to the limitation of its structure, the resin sealing film bears the screw fastening pressure, resulting in insufficient rigidity and easy deformation on the surface. Utility Model Content

[0004] The technical problem to be solved by the present utility model is that the existing integrated sealing end cover is simple in structure but prone to deformation and has insufficient rigidity.

[0005] To this end, the present utility model provides a highly rigid integrated sealing end cover and a ball screw pair having the same.

[0006] The technical solution adopted by the present utility model to solve its technical problems is as follows:

[0007] A highly rigid integrated sealing end cover is installed at the end of a ball nut and sleeved on a ball screw, and includes:

[0008] A metal sealing cover, and

[0009] A sealing film, the sealing film is arranged at one end of the metal sealing cover facing the ball nut;

[0010] A support portion, the support portion is arranged on the metal sealing cover, and the support portion provides support for the metal sealing cover to prevent it from deforming.

[0011] Further, a receiving groove for receiving the sealing film is arranged on the metal sealing cover, the support portion is spaced from the bottom of the receiving groove, and the sealing film is filled between the support portion and the metal sealing cover.

[0012] Further, the accommodation groove penetrates through the inner side wall of the metal sealing gland, the sealing film extends to between the metal sealing gland and the ball screw, and the shape of the inner circle of the sealing film is adapted to the ball screw groove.

[0013] Further, the sealing film is made of resin material.

[0014] Further, the metal sealing gland and the sealing film are integrally arranged.

[0015] Further, a plurality of through holes are arranged on the metal sealing gland and the sealing film along the circumferential direction of the metal sealing gland, screws are arranged on the metal sealing gland, and the screws penetrate through the through holes and are connected with the ball nut.

[0016] Further, when the supporting part is strip-shaped, the supporting part is arranged between adjacent through holes.

[0017] Further, when the supporting part is a circular boss structure, the circular boss structure is formed by stamping on both sides of the through hole or by stamping a flat hole at the through hole into a through hole with a thickness.

[0018] A ball screw pair, comprising

[0019] A ball screw, and

[0020] A ball nut, the ball nut is coaxially sleeved on the ball screw, a spiral aisle is formed between the ball nut and the ball screw, and steel balls are arranged in the spiral aisle;

[0021] A circulation part, the circulation part is arranged at the end of the ball nut for guiding the circulation of the balls;

[0022] The high-rigidity integrated sealing end cover as described above, the high-rigidity integrated sealing end cover is covered on the end of the ball nut and presses the circulation part between the ball nut and it.

[0023] Further, an installation groove is arranged at the end of the ball nut, an embedding groove is arranged at the bottom of the installation groove, the circulation part is located in the embedding groove, and the high-rigidity integrated sealing end cover is located in the installation groove.

[0024] The beneficial effect of the present utility model is that in the present application, a reinforcing rib is added in the internal cavity of the metal sealing gland, which improves the overall rigidity, can effectively resist the pressure generated during screw fastening, and reduces the deformation amount caused by the low sealing rigidity of the resin film. Description of the Drawings

[0025] The present utility model will be further described below with reference to the drawings and embodiments.

[0026] Figure 1It is a schematic structural diagram of a ball screw pair with an integrally formed sealing end cover having high rigidity in the present utility model.

[0027] Figure 2 It is a schematic diagram of the installation relationship between the sealing end cover and the ball nut in the present utility model.

[0028] Figure 3 It is a schematic structural diagram of the circulation part in the present utility model.

[0029] Figure 4 It is a schematic structural diagram of an integrally formed sealing end cover having high rigidity in the present utility model.

[0030] Figure 5 It is used to illustrate Figure 4 The A - A sectional view showing the positional relationship between the metal sealing gland and the sealing film in

[0031] Figure 6 It is used to illustrate Figure 5 The enlarged view of part A showing the positional relationship between the receiving groove and the sealing film in

[0032] Figure 7 It is a schematic structural diagram of the support part with a mesh structure in Embodiment 1 of the present utility model.

[0033] Figure 8 is a schematic structural diagram of the support part with a circular boss structure in Embodiment 2 of the present utility model.

[0034] In the figure: 1. Ball screw; 2. Ball nut; 21. Installation groove; 22. Embedded groove; 23. Threaded hole; 3. Circulation part; 4. Sealing end cover; 41. Metal sealing gland; 42. Sealing film; 43. Receiving groove; 44. Support part; 45. Through hole; 5. Screw. Detailed implementation manners

[0035] Now, the present utility model will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic way, so they only show the components related to the present utility model.

[0036] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise stated, the meaning of "a plurality" is two or more.

[0037] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] Embodiment 1

[0039] Referring to Figures 1-3 , a ball screw pair with a high-rigidity integral sealing end cap, comprising a ball nut 2, a ball screw 1, a screw 5, a circulation part 3, steel balls and a high-rigidity integral sealing end cap 4. The sealing end cap 4 is connected to the ball nut 2 through the screw 5, which prevents dust and the like from entering the inside of the ball nut 2 during the operation of the ball screw pair 1, ensures the smooth operation of the device, and effectively extends the service life of the device.

[0040] The ball nut 2 is sleeved on the ball screw 1. A spiral aisle is formed between the ball nut 2 and the ball screw 1. The steel balls are arranged in the spiral aisle between the ball nut 2 and the ball screw 1. An installation groove 21 is provided at the end of the ball nut 2, and an embedding groove 22 is provided at the bottom of the installation groove 21. The circulation part 3 is installed at the end of the ball nut 2 through bolts and is located in the embedding groove 22, which is used to provide guidance for the circulation of the steel balls.

[0041] The sealing end cap 4 is located in the installation groove 21. A plurality of threaded holes 23 are provided at the bottom of the installation groove 21 along the circumferential direction of the roller nut. The screw 5 passes through the sealing end cap 4 and cooperates with the threaded holes 23 to fixedly install the sealing end cap 4 on the ball nut 2.

[0042] Referring toFigure 4 , a highly rigid integral sealing end cover 4, specifically including a sealing film 42, a metal sealing gland 41 and a support portion 44, and the overall end cover seal is in a circular structure.

[0043] As Figure 5 , 6 shown, specifically, the metal sealing gland 41 is arranged in a ring shape, and a receiving groove 43 is provided at one end of the metal sealing gland 41 facing the ball screw nut 2. The receiving groove 43 penetrates the inner circular side wall of the metal sealing gland 41. The sealing film 42 is filled in the receiving groove 43. The sealing film 42 is made of resin material. The sealing film 42 extends between the metal sealing gland 41 and the ball screw 1. The inner ring shape of the sealing film 42 is formed by matching with the groove of the ball screw 1. Opposite through holes 45 are provided on the metal sealing gland 41 and the sealing film 42 for the screw 5 to pass through.

[0044] The support portion 44 is connected to the notch position of the receiving groove 43 of the metal sealing gland 41. The sealing film 42 is filled between the metal sealing gland 41 and the support portion 44. Specifically, the sealing film 42 is filled in the receiving groove 43 and wraps both sides of the support portion 44. The support portion 44 is arranged on both sides of the through hole 45, that is, between adjacent through holes 45, and its shape can also be strip-shaped, circular, etc. These support portions 44 can play the role of improving the sealing rigidity of the end cover when the screw 5 is tightened, and can prevent deformation when the screw 5 is tightened.

[0045] In this embodiment, the support portion 44 is strip-shaped, and multiple support portions 44 can be arranged between adjacent through holes 45. The arrangement method of the multiple support portions 44 is not limited. As Figure 4 shown, the support portion 44 can be arranged along the radial direction of the metal sealing gland 41; as Figure 7 shown, one end of adjacent support portions 44 among the multiple support portions 44 can be inclined to be close to each other to form a mesh structure.

[0046] Embodiment 2

[0047] In this embodiment, the support portion 44 is a circular boss. This circular boss structure can be formed by stamping on both sides of the screw 5 installation through hole 45 (as shown in Fig. 8(a)), or the through hole 45 can be formed by stamping a flat hole into a through hole 45 with a certain thickness (as shown in Fig. 8(b)).

[0048] In summary, the integral end cover seal in this application has fewer component parts, is easy to process, and has a lower production cost. Compared with the split end cover seal that installs each component part in sequence, the integral end cover seal only needs to be installed once, is simpler during assembly, and can effectively improve the assembly efficiency.

[0049] Moreover, compared with the ordinary integral end - cover seal, a support part 44 is additionally provided at the inner cavity of the metal seal gland 41 in this application, which improves the overall rigidity, can effectively resist the pressure generated when the screw 5 is tightened, and reduces the deformation amount caused by the low rigidity of the metal seal gland 41.

[0050] Enlightened by the above - mentioned ideal embodiments of the present utility model, through the above - mentioned description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A highly rigid one-piece sealing end cover is installed at the end of a ball nut (2) and sleeved on a ball screw (1), characterized in that, including a metal sealing gland (41), and a sealing film (42), the sealing film (42) being disposed at one end of the metal sealing gland (41) facing the ball screw nut (2); a support portion (44), the support portion (44) being disposed on the metal sealing gland (41), and the support portion (44) providing support for the metal sealing gland (41) to prevent it from deforming.

2. The highly rigid one-piece sealed end cover according to claim 1, wherein, A receiving groove (43) for receiving the sealing film (42) is provided on the metal sealing gland (41), the support portion (44) is spaced from the bottom of the receiving groove (43), and the sealing film (42) is filled between the support portion (44) and the metal sealing gland (41).

3. The highly rigid integral sealing end cover according to claim 2, wherein, The receiving groove (43) penetrates the inner side wall of the metal sealing gland (41), the sealing film (42) extends between the metal sealing gland (41) and the ball screw (1), and the inner circle shape of the sealing film (42) is adapted to the groove of the ball screw (1).

4. The highly rigid one-piece sealed end cover according to claim 1, characterized in that The sealing film (42) is made of resin.

5. The highly rigid one-piece sealed end cover according to claim 1, characterized in that, The metal sealing gland (41) and the sealing film (42) are integrally provided.

6. The highly rigid one-piece sealed end cover according to claim 1, characterized in that, A plurality of through holes (45) are provided on the metal sealing gland (41) and the sealing film (42) along the circumferential direction of the metal sealing gland (41), a screw (5) is provided on the metal sealing gland (41), and the screw (5) passes through the through hole (45) and is connected to the ball screw nut (2).

7. The highly rigid one-piece sealed end cover according to claim 1, characterized in that, When the support portion (44) is strip-shaped, the support portion (44) is disposed between adjacent through holes (45).

8. The highly rigid integral sealing end cover according to claim 1, characterized in that, When the support portion (44) is a circular boss structure, the circular boss structure is formed by stamping on both sides of the through hole (45) or by stamping a flat hole at the through hole (45) into a through hole (45) with a thickness.

9. A ball screw pair, characterized in that, including a ball screw (1), and a ball screw nut (2), the ball screw nut (2) being coaxially sleeved on the ball screw (1), a spiral passage being formed between the ball screw nut (2) and the ball screw (1), and steel balls being disposed in the spiral passage; a circulation portion (3), the circulation portion (3) being disposed at the end of the ball screw nut (2) for guiding the circulation of the steel balls; The high-rigidity integral sealing end cover (4) according to any one of claims 1-8, the high-rigidity integral sealing end cover (4) being covered on the end of the ball screw nut (2) and pressing the circulation portion (3) between the ball screw nut (2) and it.

10. The ball screw pair according to claim 9, characterized in that, An installation groove (21) is provided at the end of the ball screw nut (2), an embedding groove (22) is provided at the bottom of the installation groove (21), the circulation portion (3) is located in the embedding groove (22), and the high-rigidity integral sealing end cover (4) is located in the installation groove (21).

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