Rotatably mounted circulating component and ball screw

Abstract

The utility model discloses a rotatablely installed circulating part, which comprises a first part and a second part which are split, the first part is provided with a rotating part which is arranged in an installation groove of a nut, and the first part rotates by taking the central axis of the installation groove and the rotating part as a rotating center. And the second component is fixedly mounted in the mounting groove and locks the first component in the mounting groove. The ball screw is provided with the circulating component capable of being installed in a rotating mode. According to the circulating component and the ball screw which can be rotatably installed, the split type circulating component can be assembled in the nut without an additional fixing component, and the ball screw assembly is simple in structure, convenient to install and capable of being matched with different types of screw shafts.

Description

Technical Field

[0001] This utility model relates to the field of ball screw technology, and in particular to a rotatably mounted circulating component and a ball screw. Background Technology

[0002] With the continuous improvement of industrialization, the demand for high-speed, low-noise, long-life and high-rigidity ball screws is constantly increasing for automated equipment, industrial robots, machining centers and other applications.

[0003] Patent CN111684179B discloses a ball screw with an integrated circulation component installed in its nut. The circulation component is mounted in the nut's mounting groove via a fixing mechanism. While this integrated circulation component offers the advantage of smooth path movement, installing it requires the screw shaft to be designed with at least one threaded end open. Although this avoids interference between the lip of the circulation component and the outer diameter of the screw shaft, it results in incomplete diameter of the screw bearing contact surface. This causes the screw shaft to flex and deform during operation, directly affecting the smoothness of the circulation component, the noise of the ball flow, and the lifespan of the ball screw.

[0004] Patent CN218440476U discloses a split-type circulator, consisting of an upper circulator body and a lower circulator body, which is fastened to a nut by screws. This split-type circulator component, with its lip portion, lacks an effective fixing device after being inserted into the mounting groove of the nut, causing installation difficulties for the remaining part. The circulator component still requires other fixing parts for fastening. Furthermore, this semi-enclosed circulator component only contains a portion of the steel ball rotation channel; after the steel ball enters the rotation channel, it may experience a hard collision with the nut. Utility Model Content

[0005] The technical problem to be solved by this utility model is: This utility model provides a rotatable circulating component and ball screw, which can assemble the split circulating component into the screw nut without additional fixing components. It has a simple structure, is easy to install, and can be adapted to different types of screw shafts.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a rotatable and installable circulating component, including a split first component and a second component. The first component has a rotating part that is inserted into a mounting groove for inserting a nut. The first component rotates about the central axis of the mounting groove and the rotating part as the rotation center. The second component is fixedly inserted into the mounting groove and locks the first component in the mounting groove.

[0007] Furthermore, in order for the first component to rotate within the mounting groove, the mounting groove has a rotating groove, the rotating part is rotatably disposed within the rotating groove, and the rotating groove axially limits the rotation of the rotating part.

[0008] Furthermore, in order to fix the second component in the mounting groove, the second component has a snap-fit ​​limiting part, which is fixed in the rotating groove and presses against the rotating part.

[0009] Furthermore, in order to provide rotation space for the first component and avoid interference with the nut, the first component has a clearance portion located on the side of the rotating part, and a clearance gap is formed between the clearance portion and the mounting groove to allow the first component to rotate.

[0010] Furthermore, in order to limit the first component by the second component, the second component has a protruding limiting portion facing the avoidance portion. The second component is connected to the first component so that the protruding limiting portion is in close contact with the avoidance portion to limit the rotation of the first component.

[0011] Furthermore, in order to enable the second component to connect with the first component and restrict the rotation of the first component, the first component is provided with a slot, and the second component is provided with a plug. The plug is inserted into the slot to connect the first component and the second component into a whole.

[0012] Furthermore, in order to reduce the collision between the steel ball and the nut, the first component has a first circulation channel, the second component has a second circulation channel, and the first component and the second component are connected to form a complete circulation channel.

[0013] Furthermore, in order to install the circulation component into the nut and provide a circulation channel for the steel ball, the mounting groove has a mounting hole, the first component has a first insertion part, the second component has a second insertion part, and the first insertion part and the second insertion part form an integral plug-in part inserted into the mounting hole.

[0014] Furthermore, in order to enable the lip to be independently inserted into the groove, the first component has a lip that mates with the groove of the lead screw shaft, and rotating the first component will insert the lip away from the groove into the groove.

[0015] The technical solution adopted by this utility model to solve its technical problem is: a ball screw, including a nut and a screw shaft passing through the nut, wherein the above-mentioned circulation component is installed in the mounting groove of the nut, and a sealing end cap for fixing the circulation component is installed on the nut.

[0016] Furthermore, in order to fix and limit the circulation component, the mounting hole of the mounting groove is a stepped hole in the axial direction to limit the circulation component.

[0017] Furthermore, the lead screw shaft can be a lead screw shaft with one end open, both ends open, or both ends closed.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. The rotatable circulation component of this utility model is a split circulation component formed by a first component and a second component. The rotatable first component is easier to assemble accurately, and the non-rotatable second component effectively limits the first component. The first and second components can be fastened to the nut without the need for an additional fixing mechanism. The structure is simple and the assembly is convenient.

[0020] 2. The rotatable circulation component of this utility model has a closed circulation channel that reduces the collision between the steel ball and the lead screw, effectively reducing noise and heat generation.

[0021] 3. The rotatable circulation component of this utility model has a first component that is rotatably installed in a rotating groove, which allows the position of the lip to be adjusted, avoiding interference between the lip and the lead screw shaft when the first component is installed into the lead screw nut, and ensuring that the lip is accurately embedded in the groove after the first component is installed into the lead screw nut.

[0022] 4. The rotatable circulating component and ball screw of this utility model are applicable to structures where one end of the screw shaft is open, both ends are open, or both ends are closed. This can improve the rigidity of the screw shaft, ensure the stable operation of the steel balls on the surface of the screw shaft, and extend the service life of the ball screw. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the structure of the ball screw of this utility model;

[0025] Figure 2 A schematic diagram of the structure of a rotatable, recirculating component;

[0026] Figure 3 This is a schematic diagram of the structure of the first component;

[0027] Figure 4 A schematic diagram of the first component from another perspective;

[0028] Figure 5 This is a schematic diagram of the structure of the second component;

[0029] Figure 6 This is a schematic diagram showing the installation status of the first component;

[0030] Figure 7 This is a schematic diagram of the first component after rotation;

[0031] Figure 8 This is a schematic diagram of the second component after assembly.

[0032] Figure 9 This is a schematic diagram of the structure of the silk mother.

[0033] Figure 10 This is a cross-sectional view of the nut along line A-A;

[0034] In the diagram: 1. Circulation component, 11. First component, 111. Rotating part, 112. Clearing part, 113. Slot, 114. First circulation channel, 115. First insertion part, 116. Lip, 12. Second component, 121. Snap-fit ​​limiting part, 122. Protruding limiting part, 123. Insert block, 124. Second circulation channel, 125. Second insertion part, 2. Nut, 21. Mounting groove, 211. Rotating groove, 3. Lead screw shaft, 4. Sealing end cap. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0036] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] like Figure 1A ball screw includes a nut 2 and a screw shaft 3 passing through the nut 2. A rotatable circulation component 1 is installed in the mounting groove 21 of the nut 2, and a sealing end cap 4 for fixing the circulation component 1 is installed on the nut 2. The structure of the rotatable circulation component 1 and its specific assembly method will be described in detail below.

[0039] like Figure 9 and Figure 10 As shown, the mounting hole of the mounting groove 21 is a stepped hole in the axial direction to limit the circulation component 1. The stepped hole structure allows for axial limiting and fixing of the circulation component 1. The lead screw 3 can be one-end open, two-end open, or two-end closed. All of the above types of lead screw 3 are suitable for the rotatably mounted circulation component 1 of this embodiment.

[0040] like Figure 2 As shown, a rotatable recirculating component includes a separate first component 11 and a second component 12.

[0041] like Figure 3 and Figure 4 As shown, the first component 11 has a rotating part 111 that is inserted into the mounting groove 21 of the nut 2. The first component 11 rotates about the central axis of the mounting groove 21 and the rotating part 111. The mounting groove 21 has a rotating groove 211, and the rotating part 111 is rotatably disposed in the rotating groove 211 and is axially limited by the rotating groove 211. During installation, the rotating part 111 is inserted into the mounting groove 21. Since the rotating part 111 can rotate within the mounting groove 21, during installation... Figure 6 As shown, the insertion position of the first component 11 is adjusted so that the lip 116 is relatively far away from the lead screw shaft 3, avoiding interference between the lip 116 and the outer diameter of the lead screw shaft 3 during installation. Figure 7 As shown, after the first component 11 is inserted into the mounting groove 21, the first component 11 is rotated so that the lip 116 is correspondingly embedded in the groove of the lead screw shaft 3. Since the rotating groove 211 has a limiting effect on the rotating part 111, the first component 11 will not tilt after installation.

[0042] In this embodiment, the rotating groove 211 and the rotating part 111 are approximately circular, but they can also be fan-shaped or other common forms.

[0043] The first component 11 has a lip 116 that mates with the groove of the lead screw shaft 3. The first component 11 and the second component 12 form a dividing surface composed of arcs and straight lines (a plane from the rotating part 111 to the notch to the circulation channel), which separates the lip 116 from the body of the first component 11, so that it can be individually installed into the mounting groove 21 and rotated into the groove of the lead screw shaft 3.

[0044] Preferably, the first component 11 has a clearance portion 112 located on the side of the rotating portion 111, and a clearance gap is formed between the clearance portion 112 and the mounting groove 21 to allow the first component 11 to rotate. Figure 6 As shown, since the lip 116 needs to be away from the lead screw shaft 3 during the installation process, this means that the first component 11 needs sufficient rotation space and installation space. The clearance part 112 can achieve the above function and avoid interference between the first component 11 and the lead screw nut 2 when it is installed.

[0045] like Figure 5 and Figure 8 As shown, the second component 12 is inserted into the mounting groove 21 and connected to the first component 11, thereby forming the circulation component 1 fixed in the nut 2. After the first component 11 is installed, the circulation component 1 can be assembled and fixed simply by inserting the second component 12 into the mounting groove 21.

[0046] Since the first component 11 has rotational space within the mounting groove 21, the second component 12 has a snap-fit ​​limiting part 121. After the second component 12 is installed, the snap-fit ​​limiting part 121 is fixed in the rotation groove 211 and presses against the rotating part 111. Since the snap-fit ​​limiting part 121 cannot rotate within the rotation groove 211, the second component 12 is fixed in the mounting groove 21.

[0047] Meanwhile, the second component 12 has a protruding limiting part 122 facing the relief part 112. After the second component 12 is assembled, it is connected to the first component 11 so that the protruding limiting part 122 is tightly against the relief part 112 to restrict the rotation of the first component 11. Since the protruding limiting part 122 just abuts against the relief part 112, the first component 11 is secured when the second component 12 cannot rotate. At this time, the first component 11 also cannot rotate in the mounting groove 21.

[0048] In this embodiment, the clearance portion 112 is an arc-shaped notch structure, and the protruding limiting portion 122 is an arc-shaped protrusion. Other common structures can also be used in conjunction.

[0049] Preferably, the first component 11 is provided with a slot 113, and the second component 12 is provided with a plug 123. The plug 123 is inserted into the slot 113 to connect the first component 11 and the second component 12 into a whole. The connection between the first component 11 and the second component 12 is achieved through the cooperation of the slot 113 and the plug 123, ensuring a stable connection between the two.

[0050] In this example, slot 113 and insert 123 are trapezoidal structures, but other shapes can also be used for the same purpose.

[0051] The first component 11 has a first circulation channel 114, and the second component 12 has a second circulation channel 124. The first component 11 and the second component 12 are connected to form a complete circulation channel. The mounting groove 21 has a mounting hole. The first component 11 has a first insertion part 115, and the second component 12 has a second insertion part 125. The first insertion part 115 and the second insertion part 125 form an integral insertion joint that is inserted into the mounting hole. The steel ball enters the circulation channel through the insertion joint. Because the circulation channel is an enclosed structure, the steel ball will not directly collide with the nut 2, further reducing the noise and heat generated by the collision between the steel ball and the nut 2, achieving high speed and low noise.

[0052] In summary, the rotatable circulation component and ball screw of this utility model can assemble the split circulation component into the nut without additional fixing components. It has a simple structure, is easy to install, and can be adapted to different types of ball screw shafts.

[0053] The above description is based on the preferred embodiments of this utility model. Through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A rotatably mounted circulating part comprising a first part (11) and a second part (12) which are separate, characterised in that, The first component (11) has a rotating part (111) installed in the installation groove (21) of the nut (2), the first component (11) rotates around the central axis of the installation groove (21) and the rotating part (111), and the second component (12) is fixedly installed in the installation groove (21) and locks the first component (11) in the installation groove (21).

2. The rotatably mounted circulating component of claim 1, wherein, The installation groove (21) has a rotating groove (211), the rotating part (111) rotates in the rotating groove (211) and is axially limited by the rotating groove (211).

3. A rotatably mounted circulating component according to claim 2, wherein, The second component (12) has a clamping limiting part (121) fixedly installed in the rotating groove (211) and pressing above the rotating part (111).

4. The rotatably mounted circulating component of claim 1, wherein, The first component (11) has a avoiding part (112) on the side of the rotating part (111), the avoiding part (112) and the installation groove (21) form an avoiding gap for the rotation of the first component (11).

5. A rotatably mounted circulating component according to claim 4, wherein, The second component (12) has a protruding limiting part (122) opposite to the avoiding part (112), the connection of the second component (12) and the first component (11) makes the protruding limiting part (122) tightly contact with the avoiding part (112) to limit the rotation of the first component (11).

6. The rotatably mounted circulating component of claim 1, wherein, The first component (11) is provided with a slot (113), the second component (12) is provided with an insertion block (123), the insertion block (123) is inserted into the slot (113) to connect the first component (11) and the second component (12) as a whole.

7. A rotatably mounted circulating component according to claim 6, wherein, The first component (11) has a first circulation channel (114), the second component (12) has a second circulation channel (124), and the connection of the first component (11) and the second component (12) forms a complete circulation channel.

8. The rotatably mounted circulating component of claim 1, wherein, The installation groove (21) has an installation hole, the first component (11) has a first insertion part (115), the second component (12) has a second insertion part (125), and the first insertion part (115) and the second insertion part (125) form a whole insertion part inserted into the installation hole.

9. The rotatably mounted circulating component of claim 2, wherein, The first component (11) has a lip part (116) matched with the groove of the screw shaft (3), and the rotation of the first component (11) embeds the lip part (116) away from the groove into the groove.

10. A ball screw, characterized by, The nut (2) and the screw shaft (3) are provided, the installation groove (21) of the nut (2) is provided with the circulation component (1) of any one of claims 1-9, and the nut (2) is provided with a sealing end cover (4) for fixing the circulation component (1).

11. The ball screw of claim 10, wherein, The installation hole of the installation groove (21) is a stepped hole limiting the circulation component (1) in the axial direction.

12. The ball screw of claim 10, wherein, The screw shaft (3) is a screw shaft (3) with one end through, both ends through or both ends not through.

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