Anti-vibration device for screw and nut transmission

Abstract

The present invention relates to an anti-vibration device for a screw-nut transmission, comprising a nut seat, two support shafts, two nut seat support blocks and a connecting piece. The nut seat has a first through hole for the screw to pass through. The two support shafts are arranged relative to each other on the outer wall of the nut seat. The two support shafts are located on the same axis, and the axis is perpendicular to the extension direction of the first through hole. The two nut seat support blocks are arranged relative to each other on both sides of the nut seat. A limiting hole is respectively provided on the surface of the two nut seat support blocks opposite to the nut seat. The limiting holes are used to accommodate the support shafts. The connecting piece is connected to the two nut seat support blocks. The connecting piece is provided with a second through hole. The second through hole is arranged relative to the first through hole. In the present invention, the connecting piece can fix the relative position of the two nut seat support blocks, so that the structure of the nut seat and the nut seat support blocks is stable. When the screw vibrates, the nut seat can deflect with the support shaft as the axis according to the degree of vibration to form a buffer to prevent the vibration from affecting other components.

Description

Technical Field

[0001] The present invention relates to the field of mechanical transmission, in particular to an anti-vibration device for a screw and nut transmission. Background Art

[0002] Ball screws are ideal for converting rotary motion into linear motion, and vice versa. As the screw rotates, the nut moves axially along the screw. Typically, the nut is simply fixed to a workbench or bracket, which is then moved back and forth along the screw's axis. The nut is then adjusted until smooth movement throughout the entire travel is achieved, and then fully tightened.

[0003] However, due to the deadweight of the lead screw and the nut, the lead screw and the nut will inevitably vibrate during the movement, affecting the stability of the moving parts and affecting normal operation. Therefore, a device for preventing vibration is urgently needed. Summary of the Invention

[0004] Based on this, it is necessary to provide an anti-vibration device for a screw-nut transmission to address the problem of vibration generated during the operation of the screw and nut.

[0005] An anti-vibration device for a screw and nut transmission, comprising:

[0006] A nut seat having a first through hole for the lead screw to pass through, the nut seat including two support shafts, the two support shafts being arranged opposite to each other on the outer wall of the nut seat, the two support shafts being located on the same axis, and the axis being perpendicular to the extension direction of the first through hole;

[0007] Two nut support blocks are spaced and arranged on both sides of the nut seat relative to each other, and a limiting hole is respectively formed on the surface of the two nut support blocks opposite to the nut seat, and the limiting hole is used to accommodate the support shaft;

[0008] A connecting piece is connected to the two nut support blocks, and the connecting piece is provided with a second through hole, and the second through hole is arranged opposite to the first through hole.

[0009] In one embodiment, the anti-vibration device further includes an adjustment gap, which is provided between the nut seat and the nut seat support block, and is used to enable the support shaft to slide along the extension direction of the limiting hole.

[0010] In one embodiment, the anti-vibration device further includes a slide plate, which is sandwiched between the nut support block and the connecting member, the two nut support blocks are fixed to the surface of the slide plate, and the slide plate is provided with a third through hole, and the third through hole is arranged opposite to the first through hole;

[0011] The connecting member is provided with two oppositely arranged sliding grooves, and opposite ends of the slide plate are respectively arranged in the two sliding grooves, so as to enable the slide plate to slide along the extending direction of the sliding grooves.

[0012] In one embodiment, the connecting member comprises:

[0013] a connecting base, the slide being attached to a surface of the connecting base, and the second through hole being formed in the connecting base;

[0014] Two slide blocks are arranged at relative intervals on the connecting base. The slide blocks include a connecting portion fixedly connected to the connecting base and a bending portion connected to the connecting portion. The connecting portion, the bending portion and the connecting base surround each other to form the sliding groove.

[0015] In one embodiment, the anti-chatter device comprises:

[0016] an elastic gasket, sandwiched between the slide block and the connecting base;

[0017] A pressure regulating device is connected to the slide plate pressing block and the connecting base, and is used for regulating the pressure of the slide plate pressing block on the elastic gasket.

[0018] In one embodiment, the pressure regulating device is a bolt structure that fixes the slide plate pressure block and the connecting base.

[0019] In one embodiment, the slide plate has a first surface and a second surface opposite to each other, and the slide plate includes two first grooves formed on the first surface, and the two first grooves are spaced apart from each other;

[0020] The two nut support blocks are respectively provided with a protrusion, and the protrusion is arranged in the first groove.

[0021] In one embodiment, the slide plate includes a second groove formed on the first surface, and the second groove is used to accommodate the nut seat.

[0022] In one embodiment, the slide plate includes a third groove formed on the second surface.

[0023] In one embodiment, the anti-vibration device further includes a nut fixedly connected to the nut seat, one end of the nut is fixed to the end of the nut seat, and the other end is embedded in the first through hole.

[0024] The anti-vibration device for the screw-nut transmission mentioned above comprises a nut seat with support shafts on both sides, two nut seat support blocks, and a connecting piece. The two nut seat support blocks accommodate the support shafts through limiting holes, allowing the nut seat to rotate around the support shafts. The connecting piece can fix the positions of the two nut seat support blocks, thereby stabilizing the structure of the nut seat and the nut seat support blocks. When the screw vibrates, the nut seat can deflect at a certain angle around the support shafts to form a buffer and prevent the vibration from affecting other components. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of an anti-chatter device provided in one embodiment of the present application;

[0026] Figure 2 for Figure 1 a schematic left side view of the structure shown;

[0027] Figure 3 for Figure 1 A schematic top view of the structure shown;

[0028] Figure 4 A schematic structural diagram of a nut holder provided in one embodiment of the present application;

[0029] Figure 5 for Figure 4 Schematic diagram of the left side;

[0030] Figure 6 for Figure 4 Schematic top view of

[0031] Figure 7 A schematic structural diagram of a nut support block provided in one embodiment of the present application;

[0032] Figure 8 for Figure 7 Schematic diagram of the left side;

[0033] Figure 9 for Figure 7 Schematic top view of

[0034] Figure 10 A schematic diagram of the structure of a skateboard provided in one embodiment of the present application;

[0035] Figure 11 for Figure 10 Schematic diagram of the left side;

[0036] Figure 12 for Figure 10 Schematic top view of

[0037] Figure 13 A schematic structural diagram of a slide block provided in one embodiment of the present application;

[0038] Figure 14 for Figure 13 Schematic top view of

[0039] Figure 15 A schematic diagram of the connection structure between the slide block and the connection base provided in one embodiment of the present application;

[0040] Figure 16 A schematic structural diagram of a connection base provided in one embodiment of the present application;

[0041] Figure 17 for Figure 16 Schematic diagram of the left side;

[0042] Figure 18 for Figure 16 Schematic top view of .

[0043] Description of Figure Numbers:

[0044] 10 Anti-vibration device for screw and nut transmission

[0045] 100 nut holder

[0046] 110 first through hole

[0047] 120 support shaft

[0048] 130 Adjust the gap

[0049] 200 lead screw

[0050] 300 nut support block

[0051] 310 limit hole

[0052] 320 protrusion

[0053] 330 oil hole

[0054] 400 connectors

[0055] 410 Second through hole

[0056] 420 chute

[0057] 430 connection base

[0058] 432 Fourth Groove

[0059] 440 skateboard block

[0060] 442 connection

[0061] 444 bending part

[0062] 500 Skateboard

[0063] 510 third through hole

[0064] 520 First Surface

[0065] 522 First Groove

[0066] 524 Second Groove

[0067] 530 Second Surface

[0068] 532 Third groove

[0069] 600 elastic gasket

[0070] 700 Pressure Regulating Device

[0071] 800 nut DETAILED DESCRIPTION

[0072] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar modifications without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0073] It should be noted that when an element is referred to as being “fixed to” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0074] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0075] See Figure 1 、 Figure 2 and Figure 3. An embodiment of the present application provides an anti-vibration device 10 for a screw and nut transmission. The anti-vibration device 10 includes a nut seat 100, two support shafts 120, two nut seat support blocks 300 and a connecting member 400. The nut seat 100 has a first through hole 110 for the screw 200 to pass through. The two support shafts 120 are relatively arranged on the outer wall of the nut seat 100. The two support shafts 120 are located on the same axis, and the axis is perpendicular to the extension direction of the first through hole 110. The two nut seat support blocks 300 are spaced and relatively arranged on both sides of the nut seat 100. A limiting hole 310 is respectively provided on the surface of the two nut seat support blocks 300 opposite to the nut seat 100. The limiting hole 310 is used to accommodate the support shaft 120. The connecting member 400 is connected to the two nut seat support blocks 300. The connecting member 400 is provided with a second through hole 410. The second through hole 410 is disposed opposite to the first through hole 110 .

[0076] The material of the nut holder 100, the nut holder support block 300, and the connector 400 is not limited, as long as it can maintain its shape. In one embodiment, the nut holder 100, the nut holder support block 300, and the connector 400 are all made of metal. In one embodiment, the nut holder 100, the nut holder support block 300, and the connector 400 are all made of stainless steel, carbon steel, or aluminum alloy.

[0077] Please also see Figure 4-Figure 9 . In one embodiment, the anti-vibration device 10 further includes a nut 800. The nut 800 is fixedly connected to the nut holder 100. One end of the nut 800 is fixed to the end of the nut holder 100, and the other end is nested in the first through hole 110. It can be understood that the nut 800 can be an end cover type. The outer wall of the portion of the nut 800 nested in the first through hole 110 is in contact with the inner wall of the first through hole 110. A spiral raceway is provided on the inner wall of the nut 800, which is in contact with the lead screw 200 through a ball bearing.

[0078] It can be understood that the two support shafts 120 are located on the same axis, which means that the axes of the two support shafts 120 are on the same straight line. The axis is perpendicular to the extension direction of the first through hole 110, that is, the axis of the support shaft 120 is perpendicular to the extension direction of the lead screw 200, so as to facilitate the rotation of the nut holder 100. The support shaft 120 is provided on the surface of the nut holder 100 only as an embodiment. In one embodiment, the support shaft 120 can also be provided on the surface of the nut holder support block 300. The nut holder 100 can be provided with a corresponding groove to accommodate the support shaft 120, so that the nut holder 100 can rotate with the support shaft 120 as the rotation axis. It can be understood that when the lead screw 200 vibrates, the nut holder 100 deflects accordingly with the force of the vibration to form a buffer.

[0079] In one embodiment, the limiting hole 310 can be a through hole or a blind hole. The limiting hole 310 is used to limit the support shaft 120. The inner wall of the limiting hole 310 provides a rotation fulcrum for the support shaft 120. It can be understood that the connecting member 400 is used to fix the relative positions of the two nut support blocks 300. In one embodiment, the connecting member 400 is also used to connect the workbench to connect the nut seat 100 to the workbench. It can be understood that the diameter of the second through hole 410 is larger than the diameter of the screw 200 to facilitate the rotation of the screw. In one embodiment, the diameter of the second through hole 410 is 3mm-5mm larger than the diameter of the screw 200.

[0080] In this embodiment, the two nut support blocks 300 accommodate the support shaft 120 through the limiting holes 310, allowing the nut support 100 to rotate about the support shaft 120. The connecting member 400 can fix the relative position of the two nut support blocks 300, ensuring structural stability of the nut support and the nut support blocks 300. When the lead screw 200 vibrates, the nut support 100 can deflect at a certain angle about the support shaft 120 according to the degree of vibration to provide a buffer and prevent the vibration from affecting other components.

[0081] In one embodiment, an oil hole 330 is formed on the surface of the nut support block 300. The oil hole 330 is connected to the limiting hole 310 and is used to add lubricating oil to the limiting hole 310 to facilitate the rotation of the support shaft 120. In one embodiment, a lubricating material is provided on the surface of the support shaft 120.

[0082] In one embodiment, the anti-vibration device 10 further includes an adjustment gap 130. The adjustment gap 130 is provided between the nut holder 100 and the nut holder support block 300. The adjustment gap 130 is used to allow the support shaft 120 to slide along the extension direction of the limiting hole 310. In one embodiment, when the limiting hole 310 is a blind hole, the depth of the limiting hole 310 is greater than the length of the support shaft 120. In one embodiment, the adjustment gap 130 may be 2 mm to 3 mm. It is understood that the adjustment gap 130 is provided on both sides of the nut holder 100.

[0083] In this embodiment, when the lead screw 200 vibrates, it may produce vibrations in the axial direction of the support shaft 120. The nut holder 100 can slide along the support shaft 120 through the adjustment gap 130 to achieve buffering, reducing the impact of the vibration on the nut holder support block 300. This further prevents the vibration from affecting the workbench. At the same time, by moving the nut holder 100 along the radial direction of the lead screw 200, possible jamming during operation is avoided.

[0084] Please also see Figure 10-15 . In one embodiment, the anti-vibration device 10 further includes a slide plate 500. The slide plate 500 is clamped between the nut support block 300 and the connector 400. The two nut support blocks 300 are fixed to the surface of the slide plate 500. The slide plate 500 is provided with a third through hole 510. The third through hole 510 is arranged opposite to the first through hole 110. The connector 400 is provided with two oppositely arranged slide grooves 420. The opposite ends of the slide plate 500 are respectively arranged in the slide groove 420, so as to enable the slide plate 500 to move along the extension direction of the slide groove 420 (i.e. Figure 3 Slide in the direction of the arrow.

[0085] It is understandable that the slide 500 moves together with the two nut support blocks 300. In one embodiment, the slide groove 420 can be a through groove (i.e. a groove that is not closed at both ends), or an open groove (i.e. a groove that is closed at one end) or an oblong groove (i.e. a groove that is closed at both ends). It is understandable that the extension directions of the two slide grooves 420 are parallel, so that the slide 500 can slide. The extension direction of the slide groove 420 can be set as needed. In one embodiment, the extension direction of the slide groove 420 can be perpendicular to the axial direction of the support shaft 120. In one embodiment, the connector 400 can be provided with a plurality of slide grooves 420, and the slide groove 500 is correspondingly provided with a plurality of protrusions arranged in the slide groove 420. In one embodiment, as Figure 15As shown, the slide groove 420 can not only make the slide plate 500 slide, but also apply pressure perpendicular to the slide plate 500 to the slide plate 500, thereby limiting the slide plate 500 and making the slide plate 500 movably connected to the connecting member 400, thereby preventing the slide plate 500 from being separated from the connecting member 400.

[0086] In this embodiment, when the vibration of the lead screw 200 is such that even the rotation of the nut holder 100 cannot offset the vibration, the nut holder 100 drives the nut holder support block 300 and the slide plate 500 to slide along the slide groove 420 to further provide a buffer and reduce the impact of the vibration on the connecting member 400. At the same time, the nut holder 100 can be radially displaced in more directions along the lead screw 200, further avoiding possible jamming during operation.

[0087] In another embodiment, the connector 400 may define at least one slide groove 420. The slide plate 500 may be provided with at least one protrusion that is received within the slide groove 420. Male and female stoppers are provided on the protrusion of the slide plate 500 and on the inner wall of the slide groove 420, respectively. The male and female stoppers extend at an angle to the depth of the slide groove 420, thereby limiting the position of the slide plate 500.

[0088] Please also see Figure 16-Figure 18 In one embodiment, the connecting member 400 includes a connecting base 430 and two slide pressing blocks 440. The slide 500 is attached to the surface of the connecting base 430. The second through hole 410 is opened in the connecting base 430. The two slide pressing blocks 440 are arranged at a relative interval on the connecting base 430. The slide pressing block 440 includes a connecting portion 442 fixedly connected to the connecting base 430, and a bending portion 444 connected to the connecting portion 442. The connecting portion 442, the bending portion 444 and the connecting base 430 surround and form the slide groove 420.

[0089] In one embodiment, the connecting portion 442 and the bending portion 444 form an "L" shape, and surround the connecting base 430 to form the slide groove 420. The material of the connecting base 430 and the slide block 440 is not limited. In one embodiment, the material of the connecting base 430 and the slide block 440 can be metal. It can be understood that the slide block 440 is used to clamp the slide 500, so the slide block 440 is not limited to Figure 13 、 Figure 14The shape of the slide 500 can be any shape, as long as it can compress the slide 500. For example, the slide pressing block 440 can be hook-shaped, and the hook portion can be used to engage the slide 500. In one embodiment, the connecting base 430 defines a fourth groove 432. The fourth groove 432 is used to accommodate the slide 500. The inner wall of the fourth groove 432 and the slide pressing block 440 surround each other to form the slide groove 420.

[0090] In this embodiment, the two slide pressing blocks 440 are used to restrict the slide 500 to the surface of the connecting base 430 , so that the slide 500 can slide along the sliding groove 420 .

[0091] In one embodiment, the anti-vibration device 10 includes an elastic gasket 600 and a pressure regulating device 700. The elastic gasket 600 is interposed between the slide block 440 and the connecting base 430. The pressure regulating device 700 is connected to the slide block 440 and the connecting base 430 and is used to adjust the pressure exerted by the slide block 440 on the elastic gasket 600. It is understood that the thickness of the elastic gasket 600 can vary depending on the pressure applied by the pressure regulating device 700 on the slide block 440, thereby varying the width of the chute 420.

[0092] In this embodiment, the pressure regulating device 700 adjusts the pressure applied to the slide block 440 to deform the elastic gasket 600 and further adjust the width of the chute 420. This adjusts the friction between the slide 500 and the inner wall of the chute 420, thereby adjusting the appropriate cushioning level according to actual conditions.

[0093] It is understandable that the material of the elastic gasket 600 is an elastic material, which can be selected according to the application. In one embodiment, the elastic gasket 600 can be copper or rubber. It is understandable that copper itself has poor elasticity. The copper described in this application is heat-treated copper with good elasticity. The size of the elastic gasket 600 can be increased or decreased according to actual needs. In one embodiment, the elastic gasket 600 covers the contact surface between the connecting portion 442 and the connecting base 430. The structure of the pressure regulating device 700 is not limited, as long as it can change the pressure between the slide block 440 and the connecting base 430.

[0094] In one embodiment, the pressure regulating device 700 is a bolt structure that securely connects the slide block 440 to the connecting base 430. It is understood that in this embodiment, the distance between the slide block 440 and the connecting base 430 can be adjusted based on the tightness of the bolt, thereby causing the elastic gasket 600 to deform.

[0095] In one embodiment, the slide 500 has a first surface 520 and a second surface 530 that are opposite to each other. The slide 500 includes two first grooves 522 disposed on the first surface 520. The two first grooves 522 are spaced apart from each other. The two nut support blocks 300 are each provided with a protrusion 320. The protrusion 320 is disposed within the first groove 522.

[0096] It is understood that the cooperation between the protrusion 320 and the first groove 522 can be used to position the nut support block 300. In this embodiment, the protrusion 320 and the first groove 522 function as male and female stoppers, facilitating assembly of the nut support block 300 and providing a stable structure, thereby preventing unnecessary vibration during operation. It is understood that multiple cooperation between the first grooves 522 and the protrusion 320 can be provided on the contact surface between the two nut support blocks 300 and the slide 500.

[0097] In one embodiment, the slide plate 500 includes a second groove 524 defined in the first surface 520. The second groove 524 is configured to accommodate the nut holder 100. In this embodiment, the second groove 524 serves to position and assemble the nut holder 100. In one embodiment, the distance between the second groove 524 and the outer wall of the nut holder 100 is greater than or equal to the adjustment gap 130.

[0098] In one embodiment, the slide 500 includes a third groove 532 defined in the second surface 530. The size and shape of the third groove 532 are not limited and can be configured as needed. In one embodiment, the third groove 532 can be a through groove or an oblong groove. In this embodiment, the third groove 532 is used to reduce the contact area between the slide 500 and the connecting base 430, thereby reducing the sliding resistance of the slide 500. Furthermore, the third groove 532 can serve as a process groove to facilitate processing.

[0099] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0100] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. An anti-vibration device for a screw and nut transmission, characterized in that: include: A nut seat (100) has a first through hole (110) for a lead screw (200) to pass through, the nut seat (100) comprising two support shafts (120), the two support shafts (120) being arranged opposite to each other on the outer wall of the nut seat (100), the two support shafts (120) being located on the same axis, and the axis being perpendicular to the extension direction of the first through hole (110); Two nut support blocks (300) are arranged at opposite sides of the nut seat (100) with a spacing therebetween, and a limiting hole (310) is respectively formed on the surface of the two nut support blocks (300) opposite to the nut seat (100), and the limiting hole (310) is used to accommodate the support shaft (120); A connecting member (400) is connected to the two nut support blocks (300), the connecting member (400) is provided with a second through hole (410), and the second through hole (410) is arranged opposite to the first through hole (110); It also includes a slide plate (500) sandwiched between the nut support block (300) and the connecting member (400), the two nut support blocks (300) being fixed to the surface of the slide plate (500), the slide plate (500) being provided with a third through hole (510), the third through hole (510) being arranged opposite to the first through hole (110); The connecting member (400) is provided with two oppositely arranged sliding grooves (420), and the opposite ends of the slide plate (500) are respectively arranged in the two sliding grooves (420) for making the slide plate (500) slide along the extension direction of the sliding grooves (420); The slide plate (500) has a first surface (520) and a second surface (530) opposite to each other, and the slide plate (500) includes two first grooves (522) opened on the first surface (520), and the two first grooves (522) are arranged relative to each other and spaced apart. The two nut support blocks (300) are respectively provided with a protrusion (320), and the protrusion (320) is arranged in the first groove (522); The slide plate (500) includes a second groove (524) opened on the first surface (520), and the second groove (524) is used to accommodate the nut seat (100); the slide plate (500) includes a third groove (532) opened on the second surface (530).

2. The anti-chatter device according to claim 1, wherein: It also includes an adjustment gap (130) disposed between the nut seat (100) and the nut seat support block (300) and used to enable the support shaft (120) to slide along the extension direction of the limiting hole (310).

3. The anti-chatter device according to claim 1, wherein: The connecting member (400) comprises: A connecting base (430), the slide plate (500) is attached to the surface of the connecting base (430), and the second through hole (410) is opened in the connecting base (430); Two slide block presses (440) are arranged at a relative interval on the connecting base (430), and the slide block presses (440) include a connecting portion (442) fixedly connected to the connecting base (430), and a bending portion (444) connected to the connecting portion (442). The connecting portion (442), the bending portion (444) and the connecting base (430) surround and form the sliding groove (420).

4. The anti-chatter device according to claim 3, characterized in that include: An elastic gasket (600) is sandwiched between the slide plate pressing block (440) and the connecting base (430); A pressure regulating device (700) is connected to the slide plate pressing block (440) and the connecting base (430) and is used to regulate the pressure of the slide plate pressing block (440) on the elastic gasket (600).

5. The anti-chatter device according to claim 4, characterized in that The pressure regulating device (700) is a bolt structure for fixedly connecting the slide plate pressing block (440) and the connecting base (430).

6. The anti-chatter device according to claim 1, wherein: It also includes a nut (800) fixedly connected to the nut seat (100), one end of the nut (800) is fixed to the end of the nut seat (100), and the other end is embedded in the first through hole (110).

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