Ball screw with segmented circulation component

Abstract

The utility model relates to the technical field of linear actuating devices, in particular to a ball screw with a sectional circulating component, which comprises a screw, a nut coaxially sleeves the screw, and a circulating raceway is formed between the nut and the screw; the circulator is arranged at the end part of the nut, and a guide channel connected with the circulating raceway is arranged on the circulator and is used for guiding the balls to circulate; the guide cylinder is inserted into the wall thickness of the nut, a return roller path used for being connected with the guide channel is arranged in the guide cylinder, and the return roller path is arranged to be in an arc shape bent towards the axis of the nut; and the balls are arranged in the circulating raceway, the reversing raceway and the guide channel in a rolling manner. The guide cylinder is placed between the two circulators, a certain angle is formed between the return raceway in the guide cylinder and the axis, the angle is larger when the balls enter the circulators from the guide cylinder, the impact points of the balls are made to deviate towards the inner thick positions, and the service life of circulation components is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of linear actuating devices, and in particular to a ball screw with a segmented circulation component. Background Art

[0002] With the continuous advancement of industrialization, the demand for high-speed, long-life ball screws in automated equipment continues to grow. Existing technical solutions primarily rely on an integrated circulation component to circulate the steel balls. While this circulation component offers the advantage of ease of installation, the existing through-hole design, parallel to the centerline of the nut, frequently causes significant impacts on the weak points at the entrance and exit of the circulation component due to the high-speed circulation of the steel balls, shortening the lifespan of the ball screw. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the weak parts of the existing circulation components are impacted by balls, resulting in a decrease in the service life of the circulation components.

[0004] To this end, the utility model provides a ball screw with a segmented circulation component.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A ball screw with a segmented circulation component, comprising:

[0007] A lead screw, the nut is coaxially sleeved on the lead screw, and a circulating raceway is formed between the nut and the lead screw;

[0008] A circulator is provided at the end of the nut and is provided with a guide channel connected to the circulation raceway to guide the ball circulation;

[0009] A guide cylinder is inserted into the wall thickness of the nut, and a return raceway is provided in the guide cylinder for engaging with the guide channel, and the return raceway is configured to be an arc curved toward the axis of the nut;

[0010] The balls are arranged to roll in the circulating raceway, the return raceway and the guide channel.

[0011] Furthermore, the curvature of the end portion of the return raceway is greater than the curvature of the middle portion of the return raceway.

[0012] Furthermore, the nut is provided with a through hole for inserting the guide cylinder, the through hole is arranged along the axial direction of the nut, and the cross section of the through hole is arranged to be in a runway shape.

[0013] Furthermore, a guide groove is provided on the inner side wall of the through hole, and a guide bar is provided on the outer side wall of the guide cylinder, and the guide bar is plugged into and matched with the guide groove.

[0014] Furthermore, the guide cylinder is detachably connected to the circulator.

[0015] Furthermore, the guide cylinder is inserted between the circulators provided at both ends of the nut, the end of the guide cylinder is provided with a slot, and the circulator is provided with an insert block adapted to the slot.

[0016] Furthermore, the end of the nut is provided with a mounting groove for embedding the circulator.

[0017] Furthermore, the circulator includes a mounting plate and a reflux block, the mounting plate is provided with mounting holes for fixing the circulator on a nut, and the guide channel is provided on the reflux block.

[0018] Furthermore, the mounting plate return block is integrally formed on a side of the mounting plate facing the axis of the nut.

[0019] Furthermore, a mounting groove for mounting a circulator is provided at the end of the nut, and a blocking piece is connected to the end of the nut, and the blocking piece is shielded at the end of the nut to press the circulator into the mounting groove.

[0020] The beneficial effect of the present invention is that a guide cylinder is placed in the through hole of the nut, and the return raceway inside the guide cylinder has a certain angle with the axis. The angle is larger when entering the circulator from the guide cylinder, so that the impact point of the ball is offset to the position with thicker flesh on the inside, thereby increasing the service life of the circulation component. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 It is a structural schematic diagram of a ball screw with a segmented circulation component in the utility model.

[0023] Figure 2 It is a structural diagram of the nut in the utility model.

[0024] Figure 3 It is a structural schematic diagram of the guide cylinder in the utility model.

[0025] Figure 4 It is a structural schematic diagram of the return raceway in the utility model.

[0026] Figure 5 It is a structural diagram of the circulator in the utility model.

[0027] Figure 6 It is a schematic diagram of the ball impact circulator in the present utility model.

[0028] In the figure: 1. Segmented circulation component; 11. circulator; 111. Mounting plate; 112. Return block; 113. Guide channel; 114. Mounting hole; 12. Guide cylinder; 121. Return raceway; 122. Slot; 123. Guide strip; 2. Lead screw; 3. Nut; 31. Through hole; 32. Mounting groove; 33. Baffle; 4. Ball. DETAILED DESCRIPTION

[0029] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0032] A ball screw with a segmented circulation component includes a segmented circulation component 1, a screw 2, a nut 3, and balls 4. The nut 3 is coaxially sleeved on the screw 2, forming a circulation raceway between the nut 3 and the screw 2. A plurality of balls 4 are disposed in the circulation raceway. As the balls 4 roll in the circulation raceway, the nut 3 slides with the screw 2 along its axial direction.

[0033] The segmented circulation component 1 includes a circulator 11 and a guide cylinder 12, wherein the cross-section of the guide cylinder 12 in a plane perpendicular to the axial direction of the nut 3 is set to a runway shape, and a through hole 31 is provided in the wall thickness of the nut 3. The current state of the through hole 31 is adapted to the guide cylinder 12, and the guide cylinder 12 can be stably inserted in the through hole 31. A guide groove is also provided on the side wall of the through hole 31. A guide bar 123 is connected to the outer wall of the guide cylinder 12, and the guide bar 123 is inserted in the guide groove to position the guide cylinder 12 to prevent the guide cylinder 12 from rotating in the through hole 31.

[0034] A return raceway 121 is provided within the guide cylinder 12 and is arranged axially along the nut 3. The return raceway 121 communicates with both ends of the circulating raceway. The circulator 11 is embedded in a mounting groove 32 provided at the end of the nut 3. A retaining plate 33 is also connected to the end of the nut 3. The retaining plate 33 covers the end of the nut 3 and presses the circulator 11 into the mounting groove 32.

[0035] The circulator 11 includes a mounting plate 111 and a return block 112. The mounting plate 111 and the return block 112 are integrally formed on the side of the mounting plate 111 facing the axis of the nut 3. The mounting plate 111 is provided with a mounting hole 114 for fixing the circulator 11 to the nut 3. The return block 112 is provided with a guide channel 113 to guide the circulation of the balls 4. A slot 122 is provided at the end of the guide cylinder 12, and an insert is provided on the return block 112. The guide cylinder 12 is inserted into the end of the return block 112 away from the mounting plate 111, and the return raceway 121 is connected between the guide channel 113 and the return raceway 121.

[0036] It should be noted that the return raceway 121 is set to be an arc with both ends bent toward the axis of the nut 3. The curvature of the end of the return raceway 121 is greater than the curvature of the middle position of the return raceway 121. The connection between the return raceway 121 and the guide channel 113 is a curved surface connection, so that the steel ball can turn smoothly.

[0037] The present application provides an arc-shaped return raceway 121 in the guide cylinder 12, so that the steel ball can pass through the circulator 11 more smoothly. The inner wall of the return raceway 121 is gradually changed toward the guide channel 113, which further reduces the change in the movement path of the steel ball in the through hole 31 when the steel ball leaves the return raceway 121 and enters the circulator 11 reflow surface. The ball 4 can smoothly transition from the return raceway 121 to the circulator 11, which is different from the design of the return raceway 121 being parallel to the center line of the nut 3 (such as Figure 6 In the a-picture), in this application, the inner wall of the return raceway 121 is curved gradually toward the direction of the guide channel 113, referring to Figure 6As shown in the small figure b, the impact point of the steel ball on the rotating surface of the circulator 11 when leaving the through hole 31 moves toward the thick part of the circulator 11, so that the circulator 11 can withstand larger and more frequent steel ball impacts, thereby improving the service life of the circulator 11.

[0038] Based on the above-described preferred embodiments of the present invention, and in accordance with the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A ball screw with a segmented circulation component, characterized in that: include, a lead screw (2), and A nut (3), wherein the nut (3) is coaxially sleeved on the lead screw (2), and a circulating raceway is formed between the nut (3) and the lead screw (2); A circulator (11), the circulator (11) being arranged at the end of the nut (3), and the circulator (11) being provided with a guide channel (113) connected with the circulation raceway for guiding the balls (4) to circulate; A guide cylinder (12), the guide cylinder (12) being inserted into the wall thickness of the nut (3), the guide cylinder (12) being provided with a return raceway (121) for engaging with the guide channel (113), the return raceway (121) being provided in an arc shape bent toward the axis of the nut (3); The balls (4) are arranged to roll in the circulating raceway, the return raceway (121) and the guide channel (113).

2. The ball screw with segmented circulation components according to claim 1, characterized in that: The curvature of the end of the return raceway (121) is greater than the curvature of the middle position of the return raceway (121).

3. The ball screw with segmented circulation components according to claim 1, characterized in that: The nut (3) is provided with a through hole (31) for inserting the guide cylinder (12), the through hole (31) is arranged along the axial direction of the nut (3), and the cross section of the through hole (31) is arranged in a runway shape.

4. The ball screw with segmented circulation components according to claim 3, characterized in that: A guide groove is provided on the inner side wall of the through hole (31), and a guide strip (123) is provided on the outer side wall of the guide cylinder (12), and the guide strip (123) is plugged into and matched with the guide groove.

5. The ball screw with segmented circulation components according to claim 1, characterized in that: The guide cylinder (12) is detachably connected to the circulator (11).

6. The ball screw with segmented circulation components according to claim 5, characterized in that: The guide cylinder (12) is inserted between the circulators (11) arranged at both ends of the nut (3), a slot (122) is provided at the end of the guide cylinder (12), and an insert block adapted to the slot (122) is provided on the circulator (11).

7. The ball screw with segmented circulation components according to claim 1, characterized in that: The end of the nut (3) is provided with a mounting groove (32) for embedding the circulator (11).

8. The ball screw with segmented circulation components according to claim 1, characterized in that: The circulator (11) comprises a mounting plate (111) and a reflux block (112); the mounting plate (111) is provided with a mounting hole (114) for fixing the circulator (11) on a nut (3); and the guide channel (113) is provided on the reflux block (112).

9. The ball screw with segmented circulation components according to claim 8, characterized in that: The mounting plate (111) reflux block (112) is integrally formed on a side of the mounting plate (111) facing the axis of the nut (3).

10. The ball screw with segmented circulation components according to claim 1, characterized in that: The end of the nut (3) is provided with a mounting groove (32) for mounting the circulator (11), and the end of the nut (3) is also connected to a baffle (33), which covers the end of the nut (3) and presses the circulator (11) into the mounting groove (32).

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