Integrated circulator, lead screw assembly and actuator

Abstract

The utility model provides an integrated circulator, a lead screw assembly and an actuator. A return roller path penetrating through the integrated circulator is arranged in the integrated circulator, and open holes in the two ends of the return roller path correspond to two adjacent channels in the lead screw respectively; the upper surface of the integrated circulator is an arc surface, and ball return shovels are arranged on the upper surface of the integrated circulator corresponding to the holes in the two ends of the return raceway respectively and used for guiding balls to enter and exit from the return raceway. By means of the integrated circulator, circulation of the balls on the lead screw can be achieved, and the machining difficulty and cost can be reduced.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of mechanical equipment, in particular to an integrated circulator, a screw rod assembly and an actuator. BACKGROUND

[0002] Ball screw is a main component of linear actuator, especially electric linear actuator (electric cylinder), which can convert rotary motion into linear motion. Generally, ball screw is driven by screw rod rotation to drive nut linear motion, and recently, reverse ball screw driven by nut rotation to drive screw rod linear motion also appears.

[0003] In the manufacturing of ball screw, precise machining is required for screw rod, nut and the like. However, reverse ball screw needs to realize ball returning in screw rod, which is difficult to process. CONTENT OF THE INVENTION

[0004] The present disclosure provides an integrated circulator, a screw rod assembly and an actuator.

[0005] In the first aspect, the present disclosure provides an integrated circulator, wherein a return raceway penetrating through the integrated circulator is arranged, and the openings at both ends of the return raceway correspond to two adjacent grooves on the screw rod respectively; the upper surface of the integrated circulator is a circular arc surface, and return ball spades are arranged at the positions of the openings at both ends of the return raceway on the upper surface of the integrated circulator respectively, for guiding the balls to enter and exit the return raceway.

[0006] In some embodiments, the return ball spade comprises a connecting part and a spade part, the connecting part is connected with the upper surface of the integrated circulator, and the spade part extends from the connecting part to the opening position of the return raceway; the connecting part is protruded from the upper surface of the integrated circulator, and the connecting parts of the two return ball spades are arranged at intervals on the upper surface of the integrated circulator.

[0007] In some embodiments, the spade part is arched, and at least one sub-spade is arranged at the end of the spade part away from the connecting part.

[0008] In some embodiments, the return raceway comprises a first arc segment and a second arc segment, and the bending direction of the first arc segment is opposite to that of the second arc segment.

[0009] In some embodiments, the return raceway further comprises a third arc segment protruding upward, a fourth arc segment concave downward, and a fifth arc segment protruding upward, and the third arc segment and the fifth arc segment are respectively arranged at both ends of the fourth arc segment.

[0010] In some embodiments, the two sides of the integrated circulator are respectively provided with outwardly extending fins; the upper surface of the fins is a circular arc surface coplanar with the upper surface of the integrated circulator; the fins include an outer positioning surface which is a circular arc surface.

[0011] In some embodiments, the inner wall of the opening of the return raceway and the positioning surface of the fin provided outside the opening are on the same reference surface.

[0012] In some embodiments, the material of the integrated circulator includes any one of plastic, resin, and metal.

[0013] In the second aspect, the embodiments of the present disclosure provide a lead screw assembly, including a lead screw, a nut, a ball, and the integrated circulator of the first aspect of the embodiments of the present disclosure; the integrated circulator is provided with a return raceway penetrating the integrated circulator, the return raceway connects two adjacent channels on the lead screw to form a circulating raceway, and the ball is arranged in the circulating raceway; the upper surface of the integrated circulator is a circular arc surface, and the integrated circulator is respectively provided with a ball return shovel at the opening positions of the two ends of the return raceway corresponding to the upper surface, for guiding the ball to enter and exit the return raceway.

[0014] In some embodiments, the ball return shovel includes a connecting part and a shovel part, the connecting part is connected with the upper surface of the integrated circulator, and the shovel part extends from the connecting part to the opening position of the return raceway; the connecting part is protruded from the upper surface of the integrated circulator, and the connecting parts of the two ball return shovels are arranged at intervals on the upper surface of the integrated circulator; the shape of the upper surface of the ball return shovel matches the shape of the channel in the nut, and the two ball return shovels are respectively engaged in the two adjacent channels in the nut.

[0015] In some embodiments, the lead screw is provided with a mounting groove, and the integrated circulator is arranged in the mounting groove.

[0016] In some embodiments, the shape of the upper surface of the integrated circulator matches the shape of the outer peripheral surface of the lead screw; the two sides of the integrated circulator are respectively provided with outwardly extending fins; the upper surface of the fins is a circular arc surface coplanar with the upper surface of the integrated circulator; the two fins of the integrated circulator respectively extend into the two adjacent channels on the lead screw; the fins include an outer positioning surface which is a circular arc surface matching the inner wall of the channel on the lead screw; the positioning surface is in contact with the inner wall of the channel on the lead screw to position the integrated circulator.

[0017] In some embodiments, the inner wall of the opening of the return raceway, the locating surface of the fin arranged outside the opening, and the inner wall of the channel are on the same reference surface.

[0018] In some embodiments, a plurality of the integrated circulators are distributed circumferentially, and each of two adjacent integrated circulators has one fin extending into the same channel; the spacing between the two fins corresponding to the same channel is less than the diameter of the ball.

[0019] In a third aspect, the embodiments of the present disclosure provide an actuator, comprising a driving assembly and the lead screw assembly of the second aspect of the embodiments of the present disclosure.

[0020] The embodiments of the present disclosure provide an integrated circulator. The integrated circulator is provided with a return raceway. The return raceway penetrates the integrated circulator, and the openings at both ends correspond to two adjacent channels on the lead screw, thereby connecting the two adjacent channels and forming a circulating raceway. The ball can circulate and roll in the circulating raceway, thereby achieving the ball return on the surface of the lead screw without the need to process a ball return channel in the lead screw. In particular, in the case of precise machining of a small-sized lead screw, the machining difficulty of the lead screw assembly is reduced, and the cost is saved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 FIG. 1 is a perspective view of an integrated circulator according to an embodiment of the present disclosure.

[0022] Figure 2 FIG. 2 is a schematic view of the opening side of the return raceway of the integrated circulator according to an embodiment of the present disclosure.

[0023] Figure 3 FIG. 3 is a top view of the integrated circulator according to an embodiment of the present disclosure.

[0024] Figure 4 FIG. 4 is a top view of another integrated circulator according to an embodiment of the present disclosure.

[0025] Figure 5 FIG. 5 is a sectional view of the integrated circulator according to an embodiment of the present disclosure.

[0026] Figure 6 FIG. 6 is a structural schematic view of a lead screw assembly according to an embodiment of the present disclosure.

[0027] Figure 7 FIG. 7 is a structural schematic view of a lead screw according to an embodiment of the present disclosure.

[0028] Figure 8 FIG. 8 is a mounting schematic view of an integrated circulator according to an embodiment of the present disclosure.

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 1, integral circulator; 11, return raceway; 111, opening; 112, opening; 113, third arc segment; 114, fourth arc segment; 115, fifth arc segment; 101, upper surface; 12, ball return scoop; 121, connecting portion; 122, scoop portion; 13, fin; 131, locating surface; 2, screw; 21, channel; 3, nut; 4, ball. DETAILED DESCRIPTION

[0031] In order for those skilled in the art to better understand the technical solutions of the present disclosure, the technical solutions of the present disclosure are described in detail below with reference to the drawings.

[0032] In the following, example embodiments will be described more fully with reference to the accompanying drawings, in which example embodiments can be embodied in different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided as a full and enabling disclosure of the present disclosure, and to fully convey the scope of the present disclosure to those skilled in the art.

[0033] In the case of no conflict, each embodiment of the present disclosure and each feature in the embodiments can be combined with each other.

[0034] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0035] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0036] The embodiments described herein can be described with reference to plan views and / or cross-sectional views by virtue of the present disclosure being idealized schematic illustrations. Thus, the example illustrations can be modified according to manufacturing techniques and / or tolerances. Therefore, the embodiments are not limited to the embodiments illustrated in the drawings, but include modifications of configurations formed based on manufacturing processes. Thus, the regions illustrated in the drawings have schematic properties, and the shapes of the regions shown in the drawings exemplify specific shapes of regions of elements, but are not intended to be limiting.

[0037] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure and will not be interpreted in an overly literal or overly formal sense unless expressly so defined herein.

[0038] Figure 1 is a perspective view of an integrated circulator in an embodiment of the present disclosure, Figure 2 is a schematic view of the return raceway opening side of an integrated circulator in an embodiment of the present disclosure, Figure 3 is a top view of an integrated circulator in an embodiment of the present disclosure.

[0039] As shown in Figure 1 , the integrated circulator 1 is provided with a return raceway 11 that penetrates the integrated circulator 1, and the openings 111 and 112 at both ends of the return raceway 11 correspond to two adjacent channels on the lead screw, respectively. When the integrated circulator is arranged on the lead screw, the openings 111 and 112 are aligned and connected with the two adjacent channels on the lead screw, respectively, so that the return raceway 11 connects the two adjacent channels on the lead screw, thereby forming a circulating raceway, and the ball can circulate and roll in the circulating raceway, thereby achieving ball return in the lead screw.

[0040] As shown in Figure 1 , the upper surface 101 of the integrated circulator 1 is a circular arc surface, and the upper surface 101 of the integrated circulator 1 is provided with a ball return shovel 12 at positions corresponding to the openings 111 and 112, respectively. After the integrated circulator is arranged on the lead screw to form a circulating raceway, when the ball rolls to the position of the opening 111 or the opening 112 of the integrated circulator 1 in the circulating raceway, the ball return shovel 12 can guide the path of the ball, ensuring that the ball smoothly enters the return raceway 11, thereby enabling the ball to circulate and roll in the circulating raceway.

[0041] In an embodiment of the present disclosure, the return raceway 11 in the integrated circulator 1 can connect the two adjacent channels on the lead screw, enabling the ball to return on the surface of the lead screw, without the need to process a ball return channel in the lead screw. In particular, in the case of precise machining of a lead screw with a small size, the machining difficulty of the lead screw is reduced, and the cost is saved.

[0042] As shown in Figure 1 , Figure 3As shown, the return ball shovel 12 includes a connecting portion 121 and a shovel-shaped portion 122. The connecting portion 121 is connected to the upper surface 101 of the integrated circulator 1. One shovel-shaped portion 122 extends from the connecting portion 121 corresponding to the shovel-shaped portion 122 to the opening 111 of the return raceway 11, and the other shovel-shaped portion 122 extends from the connecting portion 121 corresponding to the shovel-shaped portion 122 to the opening 112 of the return raceway 11. The connecting portion 121 protrudes from the upper surface 101 of the integrated circulator 1, and the connecting portions 121 of the two return ball shovels 12 are spaced apart on the upper surface 101 of the integrated circulator 1. In this embodiment, the shape of the upper surface of the ball return shovel 12 matches the groove shape of the nut, the connecting part 121 of the two ball return shovels 12 is spaced apart on the upper surface 101 of the integrated circulator 1, and the positions of the two ball return shovels 12 correspond to two adjacent grooves respectively, so that the integrated circulator 1 can be installed on the lead screw, and the two ball return shovels 12 are respectively arranged in two adjacent grooves of the nut.

[0043] The shape of the shovel-shaped portion 122 of the ball return shovel 12 is not particularly limited in this embodiment. For example, as Figure 3 As shown, the shovel-shaped portion 122 is arched, and two sub-shovels are provided at the end of the shovel-shaped portion 122 away from the connecting portion 121, forming a dovetail-shaped structure. For example, as Figure 4 As shown, the shovel-shaped part 122 is arched, and a sub-shovel is provided at the end of the shovel-shaped part 122 away from the connecting part 121.

[0044] In the embodiments disclosed herein, such as Figure 4 As shown, when a sub-shovel is provided at one end of the shovel-shaped part 122, the sub-shovel is positioned off-center from the center line of the opening in the return raceway. Figure 4 In the middle, the right side corresponding to the opening 111 is the outer side, and the left side corresponding to the opening 112 is the outer side. When the ball rolls in the circulating raceway and enters the return raceway 11 from the channel, at the opening 111 or the opening 112, the ball will roll along the outer and upper raceways under the action of centrifugal force. The sub-shovel is set off the outer side of the center line of the hole. The position of the sub-shovel corresponds to the trajectory of the ball and can guide the ball to enter the return raceway 11 smoothly.

[0045] The present invention does not impose any special limitations on the shape and structure of the return raceway 11.

[0046] like Figures 1 to 3 As shown, the return roller 11 is in Figure 3 The left and right directions include a first arc segment and a second arc segment. The bending direction of the first arc segment is opposite to that of the second arc segment. The first arc segment and the second arc segment are smoothly transitioned, so that the positions and orientations of the openings 111 and 112 correspond to the two adjacent grooves on the lead screw, respectively.

[0047] Figure 5 is a schematic view of a cross section of the return raceway 11 of the integrated circulator. The return raceway 11 further comprises, in the up-down direction in the Figure 5 , a third arc segment 113 protruding upwards, a fourth arc segment 114 concave downwards, and a fifth arc segment 115 protruding upwards, the third arc segment 113 and the fifth arc segment 115 are respectively located at two ends of the fourth arc segment 114, and there is a smooth transition between the third arc segment 113 and the fourth arc segment 114 and between the fourth arc segment 114 and the fifth arc segment 115. In the embodiment of the present disclosure, the third arc segment 113 and the fifth arc segment 115 protrude upwards, which is consistent with the extension direction of the upper groove of the lead screw, and is conducive to the smooth entry and exit of the ball into the return raceway; the fourth arc segment 114 is concave downwards, as shown in Figure 7 , which is conducive to keeping the upper surface of the integrated circulator 1 consistent with the outer shape of the lead screw, and facilitating the assembly of the lead screw and the nut.

[0048] In some embodiments, the geometric design of the return raceway 11 enables its radius of curvature to withstand the Hertz pressure related to the speed of the ball, so that the ball can roll at high speed in the circulating raceway.

[0049] As shown in Figure 4 , on the two sides of the integrated circulator 1 where the opening of the return raceway 11 is not provided, fins 13 extending outward are respectively arranged, the upper surface of the fin 13 is a circular arc surface coplanar with the upper surface 101 of the integrated circulator 1, which facilitates the installation of the integrated circulator 1 on the lead screw of the lead screw assembly and does not hinder the mating connection of the lead screw and the nut of the lead screw assembly.

[0050] As shown in Figure 4 , the fin 13 includes a positioning surface 131 on the outer side, which is a circular arc surface. The shape of the positioning surface 131 matches the shape of the inner wall of the upper groove of the lead screw. When the integrated circulator 1 is installed on the lead screw, the fin 13 can extend into the groove on the lead screw and contact the inner wall of the groove, thereby positioning the integrated circulator 1 so that the openings 111 and 112 of the return raceway 11 of the integrated circulator 1 are aligned and connected with the groove on the lead screw.

[0051] As shown in Figure 4 , the positioning surface 131 of one fin 13 and the inner wall 111a of the opening 111 are on the same reference surface, and the positioning surface 131 of the other fin 13 and the inner wall 112a of the opening 112 are on the same reference surface.

[0052] When the integrated circulator 1 is arranged on the screw rod, the two fins 13 of the integrated circulator 1 are respectively in contact with the inner walls of the two adjacent grooves, and since the positioning surface 131 of one fin 13 and the inner wall of the opening 111 are on the same reference surface, and the positioning surface 131 of the other fin 13 and the inner wall of the opening 112 are on the same reference surface, the error of the groove processed by the same process is small, and the two fins 13 are respectively in contact with the inner walls of the two adjacent grooves, so that the reference surfaces of the one positioning surface 131, the inner wall of the opening 111 and the inner wall of the groove are consistent, and the reference surfaces of the other positioning surface 131, the inner wall of the opening 112 and the inner wall of the groove are consistent, thereby compensating for the process error of the integrated circulator 1 and the groove, and enabling the two openings of the integrated circulator 1 returning to the raceway 11 to be accurately aligned and connected with the grooves on the screw rod.

[0053] The material of the integrated circulator 1 is not specially limited in the embodiments of the present disclosure. For example, the integrated circulator can be metal, resin, plastic or the like.

[0054] The manufacturing process of the integrated circulator 1 is also not specially limited in the embodiments of the present disclosure. For example, the integrated circulator 1 can be manufactured by forming processes including but not limited to injection molding, casting, powder metallurgy, 3D printing and the like.

[0055] Figure 6 is a structural schematic diagram of a screw rod assembly in the embodiments of the present disclosure.

[0056] As shown in Figure 6 , the screw rod assembly includes a screw rod 2, a nut 3 and a ball 4, and further includes an integrated circulator 1; as shown in Figure 1 , the integrated circulator 1 is provided with a returning raceway 11 penetrating the integrated circulator 1, and the openings 111 and 112 at both ends of the returning raceway 11 correspond to two adjacent grooves 21 on the screw rod 2 respectively; when the integrated circulator 1 is arranged on the screw rod 2, the openings 111 and 112 are aligned and connected with the two adjacent grooves 21 on the screw rod 2 respectively, so that the returning raceway 11 connects the two adjacent grooves 21 on the screw rod 2, thereby forming a circulating raceway, and the ball 4 can circulate and roll in the circulating raceway, thereby achieving ball returning in the screw rod 2.

[0057] As shown in Figure 1 , the upper surface 101 of the integrated circulator 1 is a circular arc surface, and the upper surface 101 of the integrated circulator 1 is provided with a ball returning shovel 12 at positions corresponding to the openings 111 and 112 respectively. When the ball 4 rolls to the position of the opening 111 or the opening 112 of the integrated circulator 1 in the circulating raceway, the ball returning shovel 12 can play a role of path guiding for the ball, ensuring that the ball 4 smoothly enters the returning raceway 11, thereby enabling the ball 4 to circulate and roll in the circulating raceway.

[0058] The lead screw assembly in this embodiment is a reverse ball screw, as described below... Figure 6 , Figure 7 The working process of the lead screw assembly is explained. The cylindrical outer circumference of the lead screw 2 is provided with a helical groove 21. Without the integrated circulator 1, when the nut 3 rotates, the ball 4 rolls downwards along the helical groove 21, circle by circle. In this embodiment, an integrated circulator 1 is provided on the lead screw 2. The integrated circulator 1 has a return raceway 11 inside, which connects two adjacent grooves 21. When the ball rolls through the groove 21 to the position of the integrated circulator 1, it enters the return raceway 11 of the integrated circulator 1 and returns to the adjacent previous groove 21, thus causing the ball 4 to circulate in the raceway.

[0059] In this embodiment of the present disclosure, the return raceway 11 in the integrated circulator 1 can connect two adjacent channels 21 on the lead screw 2, so that the ball 4 can return on the surface of the lead screw 2 without the need to process the return channel in the lead screw 2. Especially when the lead screw 2 is small in size and requires precision machining, it reduces the machining difficulty of the lead screw 2 and saves costs.

[0060] In this embodiment, the number of integrated circulators 1 on the lead screw, i.e., the number of circulating raceways, is not specifically limited and can be set according to the load requirements of the lead screw assembly. The more integrated circulators 1 and the more circulating raceways there are, the greater the load on the lead screw assembly. In some embodiments, the number of integrated circulators 1 on the lead screw does not exceed 6, i.e., the number of circulating raceways does not exceed 6. For example, 1, 3, or 5 integrated circulators 1 are provided on the lead screw.

[0061] like Figure 1 , Figure 3 As shown, the return ball shovel 12 includes a connecting portion 121 and a shovel-shaped portion 122. The connecting portion 121 is connected to the upper surface 101 of the integrated circulator 1. One shovel-shaped portion 122 extends from the connecting portion 121 corresponding to the shovel-shaped portion 122 to the opening 111 of the return raceway 11, and the other shovel-shaped portion 122 extends from the connecting portion 121 corresponding to the shovel-shaped portion 122 to the opening 112 of the return raceway 11. The connecting portion 121 protrudes from the upper surface 101 of the integrated circulator 1, and the connecting portions 121 of the two return ball shovels 12 are spaced apart on the upper surface 101 of the integrated circulator 1. In this embodiment, the shape of the upper surface of the return ball shovel 12 matches the groove shape of the nut. The connecting portions 121 of the two return ball shovels 12 are spaced apart on the upper surface 101 of the integrated circulator 1, and the positions of the two return ball shovels 12 correspond to two adjacent grooves, respectively. The two return ball shovels 12 are respectively engaged in two adjacent grooves of the nut.

[0062] like Figure 7As shown, the screw rod 2 is provided with a mounting groove, the shape of the mounting groove matches the shape of the integrated circulating device 1, and the integrated circulating device 1 is arranged in the mounting groove.

[0063] As shown in Figure 1 , Figure 2 , Figure 6 , Figure 7 As shown in Figure 4 , on the two sides of the integrated circulating device 1 which are not provided with the opening of the return raceway 11, the outwardly extending fins 13 are arranged respectively, and the upper surface of the fin 13 is a circular arc surface which is coplanar with the upper surface 101 of the integrated circulating device 1, which facilitates the installation of the integrated circulating device 1 on the screw rod of the screw assembly, and does not hinder the matching connection of the screw rod and the nut of the screw assembly.

[0064] As shown in Figure 4 , the fin 13 includes a positioning surface 131 on the outer side, and the positioning surface 131 is a circular arc surface. The shape of the positioning surface 131 matches the shape of the inner wall of the groove on the screw rod, and when the integrated circulating device 1 is installed on the screw rod, the fin 13 can extend into the groove on the screw rod and contact the inner wall of the groove, thereby positioning the integrated circulating device 1 so that the openings 111 and 112 of the return raceway 11 of the integrated circulating device 1 are accurately aligned with the grooves on the screw rod.

[0065] As shown in Figure 4 , the positioning surface 131 of one fin 13 and the inner wall of the opening 111 are on the same reference surface, and the positioning surface 131 of the other fin 13 and the inner wall of the opening 112 are on the same reference surface.

[0066] As shown in Figure 8 , when the integrated circulating device 1 is arranged on the screw rod 2, the two fins 13 of the integrated circulating device 1 contact the inner walls of the adjacent two grooves 21 respectively, so that the positioning surface 131 of one fin 13, the inner wall of the opening 111 and the inner wall of the groove 21 are on the same reference surface, and the positioning surface 131 of the other fin 13, the inner wall of the opening 112 and the inner wall of the groove 21 are on the same reference surface. The error of the groove machined by the same process is small, and the machining process error of the integrated circulating device 1 and the groove 21 can be compensated by positioning the two fins 13 and the adjacent two grooves 21, so that the openings 111 and 112 of the return raceway 11 of the integrated circulating device 1 are accurately aligned with the grooves 21 on the screw rod 2.

[0067] As shown in Figure 6 , Figure 7As shown, a plurality of the integrated circulators 1 are distributed in the circumferential direction on the outer circumferential surface of the screw rod 2. In the case where the integrated circulator 1 includes the fin 13, the two adjacent integrated circulators 1 each have one fin 13 extending into the same channel 21; the spacing between the fins 13 of the two integrated circulators 1 corresponding to the same channel 21 is less than the diameter of the ball 4, so as to be able to prevent the ball 4 from being stuck in the channel 21 between the adjacent integrated circulators 1 during assembly.

[0068] The embodiment of the present disclosure further provides an actuator, comprising a driving assembly and the lead screw assembly provided by the embodiment of the present disclosure.

[0069] Example embodiments have been disclosed herein and, although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation. In some instances, it will be apparent to those skilled in the art that features, characteristics or elements described with reference to one particular embodiment can be used alone or in combination with elements described in connection with other embodiments unless expressly stated otherwise. Accordingly, it will be understood by those skilled in the art that various changes in form and details can be made without departing from the scope of the present disclosure as set forth in the appended claims.

Claims

1. An integrated circulator, characterized by, The integrated circulating device (1) is provided with a return raceway (11) penetrating through the integrated circulating device (1), and the openings at both ends of the return raceway (11) correspond to two adjacent grooves on the screw rod respectively; The upper surface (101) of the integrated circulating device (1) is a circular arc surface, and the upper surface (101) of the integrated circulating device (1) is provided with ball return shovels (12) at positions corresponding to the openings at both ends of the return raceway (11) respectively, for guiding the balls to enter and exit the return raceway (11).

2. The integrated circulator of claim 1, wherein The ball return shovel (12) comprises a connecting part (121) and a shovel-shaped part (122), the connecting part (121) is connected with the upper surface (101) of the integrated circulating device (1), and the shovel-shaped part (122) extends from the connecting part (111) to the opening position of the return raceway (11); the connecting part (121) is protruded from the upper surface (101) of the integrated circulating device (1), and the connecting parts (121) of the two ball return shovels (12) are arranged at intervals on the upper surface (101) of the integrated circulating device (1).

3. The unitary circulator of claim 2, wherein, The shovel-shaped part (122) is arched, and at least one sub-shovel is arranged at one end of the shovel-shaped part (122) away from the connecting part (121).

4. The unitary circulator of any one of claims 1 to 3, wherein, The return raceway (11) comprises a first arc segment and a second arc segment, and the bending direction of the first arc segment is opposite to that of the second arc segment.

5. The unitary circulator of any one of claims 1 to 3, wherein, The return raceway further comprises a third arc segment (113) protruding upward, a fourth arc segment (114) concave downward, and a fifth arc segment (115) protruding upward, and the third arc segment (113) and the fifth arc segment (115) are respectively located at both ends of the fourth arc segment (114).

6. The unitary circulator of any one of claims 1 to 3, wherein, The two sides of the integrated circulating device (1) are respectively provided with fins (13) extending outward; the upper surface of the fin (13) is a circular arc surface coplanar with the upper surface (101) of the integrated circulating device (1); the fin (13) comprises an outer positioning surface (131), and the positioning surface (131) is a circular arc surface.

7. The unitized circulator of claim 6, wherein, The inner wall of the opening of the return raceway (11) and the positioning surface (131) of the fin (13) arranged outside the opening are on the same reference surface.

8. The unitary circulator of any one of claims 1 to 3, wherein, The material of the integrated circulating device (1) comprises any one of plastic, resin and metal.

9. A screw assembly comprising a screw rod (2), a nut (3), and balls (4), characterized in that The screw rod assembly further comprises the integrated circulating device (1) according to any one of claims 1 to 8; The integrated circulating device (1) is provided with a return raceway (11) penetrating through the integrated circulating device (1), and the return raceway (11) communicates two adjacent grooves (21) on the screw rod (2), forming a circulating raceway, and the balls (4) are arranged in the circulating raceway; The upper surface (101) of the integrated circulating device (1) is a circular arc surface, and the upper surface (101) of the integrated circulating device (1) is provided with ball return shovels (12) at positions corresponding to the openings at both ends of the return raceway (11) respectively, for guiding the balls to enter and exit the return raceway (11).

10. The lead screw assembly of claim 9, wherein, The return ball shovel (12) comprises a connecting part (121) connected with the upper surface (101) of the integrated circulator (122) and a shovel part (122) extending from the connecting part (121) to the opening position of the return raceway (11); the connecting part (121) is protruded from the upper surface (101) of the integrated circulator (1), and the connecting parts (121) of the two return ball shovels (12) are arranged at intervals on the upper surface (101) of the integrated circulator (1). The upper surface of the return ball shovel (12) is matched with the shape of the channel in the nut (3), and the two return ball shovels (12) are respectively engaged in the two adjacent channels in the nut (3).

11. Screw assembly according to claim 9 or 10, characterized in that The lead screw (2) is provided with a mounting groove, and the integrated circulator (1) is arranged in the mounting groove.

12. The lead screw assembly of claim 11, wherein, The upper surface (101) of the integrated circulator (1) is matched with the shape of the outer circumferential surface of the lead screw (2); the two side surfaces of the integrated circulator (1) are respectively provided with outwardly extending fins (13); the upper surface of the fin (13) is a circular arc surface coplanar with the upper surface (101) of the integrated circulator (1); the two fins (13) of the integrated circulator (1) respectively extend into the two adjacent channels (21) of the lead screw (2); the fin (13) comprises an outer positioning surface (131), which is a circular arc surface matched with the inner wall of the channel (21) of the lead screw (2); the positioning surface (131) is in contact with the inner wall of the channel (21) of the lead screw (2) to position the integrated circulator (1).

13. The lead screw assembly of claim 12, wherein, The inner wall of the opening of the return raceway (11), the positioning surface (131) of the fin (13) arranged outside the opening, and the inner wall of the channel (21) are on the same reference surface.

14. The lead screw assembly of claim 12, wherein, A plurality of integrated circulators (1) are distributed circumferentially, and one fin (13) of each of the two adjacent integrated circulators (1) extends into the same channel (21); the spacing between the two fins (13) corresponding to the same channel (21) is less than the diameter of the ball (4).

15. An actuator comprising: The drive assembly comprises a lead screw assembly according to any one of claims 9 to 14.

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