Ball screw with combined circulation component

Abstract

The utility model relates to the field of linear actuating devices, in particular to a ball screw with a combined circulating component, which comprises a lead screw provided with threads; the nut is arranged on the lead screw in a sleeving mode, a spiral raceway is arranged between the nut and the lead screw, and balls are arranged in the spiral raceway; the combined circulating component is arranged at the end of the nut and comprises a first circulating part and a second circulating part, a return groove is formed in the combined circulating component, and the return groove is matched with a groove in the nut and a threaded groove in the lead screw to form a complete return channel. And the balls circularly roll between the lead screw and the nut in a reciprocating manner through the return channel and the spiral raceway. The first circulation part and the second circulation part are divided by two sections of straight lines, the lip parts of the circulation parts are separated, the overall bearing capacity is higher, the service life of the circulator is prolonged, and the rigidity and strength of the lip parts are enhanced.

Description

Technical Field

[0001] This application relates to the field of linear actuators, and more particularly to a ball screw with a combined circulating component. Background Technology

[0002] With the continuous improvement of industrialization, the demand for high-speed, long-life ball screws in automated equipment is constantly increasing.

[0003] Existing recirculators are typically cast in one piece, positioned between the nut and the lead screw to guide the balls back. While this type of recirculator offers the advantage of a smooth path, installing it requires threaded grooves on the lead screw, extending to the end of the screw. This results in an incomplete diameter of the lead screw bearing contact surface, causing the lead screw shaft to flex and deform during operation. This directly affects the smoothness of the recirculator, the noise of the ball flow, and the service life of the ball screw. Utility Model Content

[0004] The technical problem this invention aims to solve is: the installation of the circulator damages the integrity of the lead screw bearing end face.

[0005] Therefore, this utility model provides a ball screw with a combined circulating component.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A ball screw with a combined circulating component includes,

[0008] A lead screw, wherein the lead screw is provided with threads;

[0009] A nut, which is sleeved on a lead screw, and a helical raceway is provided between the nut and the lead screw, with balls disposed in the helical raceway;

[0010] A combined circulation component is disposed at the end of a nut. The combined circulation component includes a first circulation part and a second circulation part. A return groove is provided on the combined circulation component. The return groove cooperates with the groove on the nut and the thread groove on the lead screw to form a complete return channel. The ball reciprocates between the lead screw and the nut through the return channel and the helical raceway.

[0011] Furthermore, the first circulation part includes a main body, an installation part, and an insertion part. The insertion part is provided with a transition groove, and the main body of the first circulation part is provided with a first guide groove. The first guide groove and the transition groove are connected to each other. The first guide groove, the transition groove, and the threaded groove on the lead screw cooperate to form a first return channel for the ball to roll.

[0012] Furthermore, the first circulation part also includes a mounting part, which is provided with mounting holes for bolts to pass through and fix the combined circulation component.

[0013] Furthermore, the second circulation part includes a lip, on which a second guide groove is provided. The second guide groove cooperates with the groove on the nut to form a second return groove for the ball to roll. The second guide groove is connected to the end of the first guide groove away from the transition groove and transitions smoothly. The second guide groove, the first guide groove, and the transition groove form a return groove.

[0014] Furthermore, the sidewall on the lip opposite to the second guide groove is set to be arc-shaped to match the threaded groove on the lead screw.

[0015] Furthermore, the end of the lip that is closer to the second guide groove and farther from the first guide groove is the inlet end, and the end of the inlet end is set to be arc-shaped.

[0016] Furthermore, the first circulation part is provided with a first mounting surface, and the second circulation part is provided with a second mounting surface. Both the first mounting surface and the second mounting surface include one or more planes. The first mounting surface and the second mounting surface are in close contact, and the first circulation part and the second circulation part are combined to form a combined circulation component.

[0017] Furthermore, a plug-in block is provided on the first mounting surface, and a slot adapted to the plug-in block is provided on the second mounting surface, wherein the plug-in block and the slot are plugged in and engaged.

[0018] Furthermore, the nut is provided with a mounting groove, and the combined circulation component is embedded in the end of the nut through the mounting groove.

[0019] Furthermore, it also includes a cover plate that covers the end of the nut, pressing the combined circulation component into the mounting groove at the end of the nut.

[0020] The beneficial effects of this invention are as follows: Specifically, the first and second circulation sections are separated by two straight lines, thus separating the lip of the circulation component. This results in higher overall load-bearing capacity, increased lifespan of the circulator, and enhanced rigidity and strength of the lip. The inlet end of the lip is rounded, allowing for a tighter fit with the lead screw and improved sealing performance. Simultaneously, it facilitates oil film formation, reduces frictional resistance, and enhances operational stability. The rounded design of the lip also disperses the contact stress between the balls and the second guide groove, reducing wear and extending service life.

[0021] When the balls roll in the first and second return grooves, the return grooves on the combined circulation component only cover part of the balls. The return grooves on the combined circulation component are semi-enclosed and need to cooperate with the grooves on the lead screw and nut to form a complete groove for the balls to roll. Therefore, the overall size of the combined circulation component in this application is smaller, effectively reducing the radial and axial installation space of the nut. This lightweight design is simple and has a low cost. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the structure of the ball screw with combined circulating components in this utility model.

[0024] Figure 2 This is a schematic diagram of the mounting groove on the nut in this utility model.

[0025] Figure 3 This is a schematic diagram of the combined circulation component in this utility model.

[0026] Figure 4 This is a schematic diagram of the mounting part in this utility model.

[0027] Figure 5 This is a schematic diagram of the structure of the first circulation section in this utility model.

[0028] Figure 6 This is a schematic diagram of the structure of the second circulation section in this utility model.

[0029] Figure 7 This is a schematic diagram of the structure of the second mounting surface in this utility model.

[0030] In the diagram: 1. Lead screw; 2. Nut; 21. Mounting groove; 3. Cover plate; 4. Combined circulation component; 41. First circulation part; 411. Mounting part; 412. Insertion part; 413. Main body; 414. First guide groove; 415. Transition groove; 416. Mounting hole; 417. First mounting surface; 418. Insertion block; 42. Second circulation part; 421. Lip; 422. Second guide groove; 423. Second mounting surface; 424. Slot; 425. Inlet end; 426. Limiting block. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Reference Figure 1 , 2 A ball screw 1 with a combined circulation component 4 includes a screw 1, a nut 2, balls, a cover plate 3, and a combined circulation component 4. The nut 2 is sleeved on the screw 1, and a helical raceway is formed between the nut 2 and the screw 1. The combined circulation component 4 is embedded in the end of the nut 2 through a mounting groove 21. A return channel is provided on the combined circulation component 4, which communicates with the helical raceway to form a circulation channel. The balls roll in the circulation channel. The cover plate 3 covers the end of the nut 2 and presses the combined circulation component 4 into the mounting groove 21 at the end of the nut 2.

[0035] It should be noted that the combined circulation component of this utility model can be applied to a structure in which the two ends of the lead screw 1 are not connected, and the two ends of the thread provided on the lead screw 1 do not penetrate the end face of the lead screw 1, that is, the end of the thread is spaced apart from the end face of the lead screw 1.

[0036] Reference Figure 3The combined circulation component 4 includes a first circulation part 41 and a second circulation part 42, which are inserted and fitted together to form a complete combined circulation component 4. Specifically, the first circulation part 41 is provided with a first mounting surface 417, and the second circulation part 42 is provided with a second mounting surface 423. Both the first mounting surface 417 and the second mounting surface 423 include one or more planes. The first mounting surface 417 is provided with a plug-in block 418, and the second mounting surface 423 is provided with a slot 424 adapted to the plug-in block 418. The plug-in block 418 and the slot 424 are inserted and fitted together, and the first mounting surface 417 and the second mounting surface 423 are tightly fitted together, thereby assembling the first circulation part 41 and the second circulation part 42 into a complete combined circulation component 4. Furthermore, the second circulation part 42 may be provided with a limiting block 426, and the mounting groove 21 is provided with a limiting groove adapted to the limiting block 426, thereby improving the installation accuracy of the combined circulation component 4.

[0037] Reference Figure 4 , 5 The first circulation part 41 includes a main body 413, a mounting part 411, and an insertion part 412. The mounting part 411 is provided with a mounting hole 416, and the insertion part 412 is provided with a transition groove 415. The main body 413 of the first circulation part 41 is provided with a first guide groove 414. The transition groove 415 is connected to the guide groove. When the combined circulation component 4 is inserted into the mounting groove 21, it is fixedly installed by bolts passing through the mounting hole 416 and threadedly connected to the nut 2. The transition groove 415 is connected to the circulation channel on the nut 2 and cooperates with the threaded groove on the lead screw 1 to form part of the circulation channel.

[0038] Reference Figure 6 , 7 The second circulation section 42 includes a lip 421, on which a second guide groove 422 is provided. The second guide groove 422 connects and smoothly transitions with the end of the first guide groove 414 away from the transition groove 415. The end of the lip 421 near the second guide groove 422 away from the first guide groove 414 is the inlet end 425. The side wall of the lip 421 opposite to the second guide groove 422 is set as an arc shape to match the thread groove on the lead screw 1. The inlet end 425 of the lip 421 is arc-shaped, so that it can fit more tightly with the lead screw 1, and the sealing performance is higher. At the same time, it helps to form an oil film, reduce frictional resistance, and improve operational stability. The arc-shaped design of the lip 421 can disperse the contact stress between the ball and the second guide groove 422, reduce wear, and extend service life.

[0039] It should be noted that the second guide groove 422, the first guide groove 414, and the transition groove 415 form a return groove. The second guide groove 422 cooperates with the groove on the nut 2 to form a second return groove for the rolling of the ball. The first guide groove 414 and the transition groove 415 cooperate with the thread groove on the lead screw 1 to form a first return groove for the rolling of the ball. The first return groove and the second return groove transition smoothly.

[0040] The balls in the helical raceway between the lead screw 1 and the nut 2 enter the second return channel between the second guide groove 422 and the upper channel of the nut 2 from the inlet end 425 of the second guide groove 422. Then, they follow the second guide groove 422 into the first return channel between the first guide groove 414 and the thread groove of the lead screw 1, and between the transition groove 415 and the thread groove of the lead screw 1. Finally, they return to the helical raceway between the lead screw 1 and the nut 2. The first return channel and the second return channel form a complete return channel. The balls in the return channel and the helical raceway circulate and roll back and forth between the nut 2 and the lead screw 1.

[0041] In this application, when the ball rolls in the first return groove and the second return groove, the return groove on the combined circulation component 4 only covers part of the ball. The return groove on the combined circulation component 4 is semi-enclosed and needs to cooperate with the grooves on the lead screw 1 and the nut 2 to form a complete groove for the ball to roll. Therefore, the overall size of the combined circulation component 4 in this application is smaller, effectively reducing the radial and axial installation space of the nut 2. This lightweight design is simple and has a low cost.

[0042] Furthermore, in this application, the mating surfaces (first mounting surface 417 and second mounting surface 423) between the first circulation part 41 and the second circulation part 42 are both planar designs, resulting in higher overall load-bearing capacity, improved lifespan of the circulator, and enhanced rigidity and strength of the lip 421.

[0043] The inlet end 425 of the lip 421 is arc-shaped, which allows it to fit more tightly with the lead screw 1 and achieve better sealing performance. At the same time, it helps to form an oil film, reduce frictional resistance, and improve operational stability. The arc-shaped design of the lip 421 can disperse the contact stress between the ball and the second guide groove 422, reduce wear, and extend service life.

[0044] Based on the above-described preferred embodiments of this utility model, and through the foregoing 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 ball screw with a combined circulating component, characterized in that, include, A lead screw (1) is provided with threads; Nut (2), the nut (2) is sleeved on the lead screw (1), a spiral raceway is provided between the nut (2) and the lead screw (1), and balls are provided in the spiral raceway; A combined circulation component (4) is provided at the end of the nut (2). The combined circulation component (4) includes a first circulation part (41) and a second circulation part (42). A return groove is provided on the combined circulation component (4). The return groove cooperates with the groove on the nut (2) and the thread groove on the lead screw (1) to form a complete return channel. The ball rolls back and forth between the lead screw (1) and the nut (2) through the return channel and the spiral raceway.

2. The ball screw with a combined circulating component according to claim 1, characterized in that, The first circulation part (41) includes a main body (413), a mounting part (411) and an insertion part (412). The insertion part (412) is provided with a transition groove (415). The main body (413) of the first circulation part (41) is provided with a first guide groove (414). The first guide groove (414) and the transition groove (415) are connected to each other. The first guide groove (414), the transition groove (415) and the threaded groove on the lead screw (1) cooperate to form a first return channel for the ball to roll.

3. The ball screw with a combined circulating component according to claim 2, characterized in that, The first circulation part (41) further includes a mounting part (411), which is provided with a mounting hole (416) for bolts to pass through and fix the combined circulation component (4).

4. The ball screw with a combined circulating component according to claim 1, characterized in that, The second circulation part (42) includes a lip (421), on which a second guide groove (422) is provided. The second guide groove (422) cooperates with the groove on the nut (2) to form a second return groove for the ball to roll. The second guide groove (422) is connected to the end of the first guide groove (414) away from the transition groove (415) and smoothly transitions. The second guide groove (422), the first guide groove (414), and the transition groove (415) form a return groove.

5. The ball screw with a combined circulating component according to claim 4, characterized in that, The sidewall of the lip (421) opposite to the second guide groove (422) is set to be arc-shaped to match the threaded groove on the lead screw (1).

6. The ball screw with a combined circulating component according to claim 5, characterized in that, The end of the lip (421) near the second guide groove (422) and away from the first guide groove (414) is the inlet end (425), and the end of the inlet end (425) is set to be arc-shaped.

7. The ball screw with a combined circulating component according to claim 1, characterized in that, The first circulation part (41) is provided with a first mounting surface (417), and the second circulation part (42) is provided with a second mounting surface (423). The first mounting surface (417) and the second mounting surface (423) each include one or more planes. The first mounting surface (417) and the second mounting surface (423) are closely fitted together. The first circulation part (41) and the second circulation part (42) are combined to form a combined circulation component (4).

8. The ball screw with a combined circulating component according to claim 7, characterized in that, The first mounting surface (417) is provided with a plug-in block (418), and the second mounting surface (423) is provided with a slot (424) adapted to the plug-in block (418), wherein the plug-in block (418) and the slot (424) are plugged in and engaged.

9. The ball screw with a combined circulating component according to claim 1, characterized in that, The nut (2) is provided with a mounting groove (21), and the combined circulation component (4) is embedded in the end of the nut (2) through the mounting groove (21).

10. The ball screw with a combined circulating component according to claim 9, characterized in that, It also includes a cover plate (3) that covers the end of the nut (2) and presses the combined circulation component (4) into the mounting groove (21) at the end of the nut (2).

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