一种滚珠丝杠电动缸

Abstract

本实用新型的一种滚珠丝杠电动缸，包括动力装置和齿轮箱，齿轮箱包括齿轮箱体、齿轮箱盖，以及安装在齿轮箱体内的输入端齿轮与输出端齿轮；动力装置的输出端连接输入端齿轮；还包括：空心传动轴、空心滚珠丝杠、套筒螺母以及内套筒；空心传动轴，包括依次连接的第一轴段和第二轴段，第一轴段与输出端齿轮固连，第一轴段通过安装轴承安装于齿轮箱体上，第二轴段的外壁设有四方导轨，其上可滑动的套接空心滚珠丝杠；套筒螺母固定于齿轮箱，与空心滚珠丝杠构成滚珠丝杠副；内套筒通过支承轴承套接于空心滚珠丝杠，其外端连接托板。本实用新型一种滚珠丝杠电动缸，通过精简传动结构，使得整体结构简单的同时还提升了传动效率与定位精度。

Claims

1. A ball screw electric cylinder, comprising a power unit and a gearbox, the gearbox comprising a gearbox body (2), a gearbox cover (4), and an input gear and an output gear installed within the gearbox body (2); the output end of the power unit is connected to the input gear; characterized in that, It also includes: a hollow drive shaft (11), a hollow ball screw (15), a sleeve nut (14), and an inner sleeve (17); The hollow drive shaft (11) is hollow inside and includes a first shaft section (12) and a second shaft section (13) connected in sequence. The first shaft section (12) is fixedly connected to the output gear. The first shaft section (12) is mounted on the gearbox (2) by means of a mounting bearing (7). The stepped surface between the first shaft section (12) and the second shaft section (13) abuts against the outer surface of the side wall of the gearbox (2). The outer wall of the second shaft section (13) is provided with a guide rail along the axial direction. The hollow ball screw (15) is slidably sleeved on the guide rail on the outer wall of the second shaft section (13) through a sliding groove provided on its inner wall. The sleeve nut (14) is fixed to the side wall of the gearbox body (2) and forms a ball screw pair with the hollow ball screw (15); The inner sleeve (17) is fitted inside the hollow ball screw (15) via a support bearing (20), and its outer end is connected to a support plate (21). The support plate (21) serves as the telescopic output end and is used to connect with the target being telescopically driven.

2. The ball screw electric cylinder according to claim 1, characterized in that: It also includes a central shaft (9), one end of which is fixedly connected to the gearbox cover (4), and the other end extends into the hollow transmission shaft (11); the central shaft (9) is provided with a guide key (18); The inner end of the inner sleeve (17) extends into the hollow drive shaft (11), and its inner wall is provided with a keyway, which can be slidably sleeved on the central shaft (9). The guide key (18) cooperates with the keyway to restrict the circumferential rotation of the inner sleeve (17).

3. The ball screw electric cylinder according to claim 2, characterized in that: The gearbox is a two-stage gearbox, comprising a primary gear pair and a secondary gear pair; The first-stage gear pair includes a first-stage driving gear (3) and a first-stage driven gear (5) meshing with it. The first-stage driven gear (5) is fixedly connected to the transmission shaft (6). The two ends of the transmission shaft (6) are respectively mounted on the gearbox body (2) and the gearbox cover (4) through mounting bearings (7). The first-stage driving gear (3) is the input end gear. The secondary gear pair includes a secondary driving gear (8) fixed to the transmission shaft (6) and a secondary driven gear (10) meshing with it; the secondary driven gear (10) is the output end gear.

4. The ball screw electric cylinder according to claim 3, characterized in that: The two ends of the first shaft segment are respectively mounted on the gearbox body (2) and gearbox cover (4) by mounting bearings (7).

5. The ball screw electric cylinder according to claim 4, characterized in that: The guide rail is a square guide rail, and the slide groove is a square slide groove.

6. The ball screw electric cylinder according to claim 5, characterized in that: A sealing ring (16) is provided between the inner end of the inner sleeve (17) and the central shaft (9).

7. The ball screw electric cylinder according to claim 6, characterized in that: The sleeve nut (14), the power unit and the side wall of the gearbox (2) are all provided with seals.

8. The ball screw electric cylinder according to claim 1, characterized in that: The sleeve nut (14) is provided with a reverser (19) on the outside. The reverser (19) has an arc-shaped groove structure and is used for the circulation of balls across the raceway in the ball screw pair.

9. The ball screw electric cylinder according to claim 7 or 8, characterized in that: The tray (21) and the inner sleeve (17) are connected by a detachable structure, and the connection between the two is sealed.

Images