Rolling type guide structure of electric cylinder

Abstract

The utility model relates to the technical field of electric cylinders, and discloses a rolling type guide structure of an electric cylinder, which comprises a cylinder barrel, an upper end cover is arranged at the upper part of the cylinder barrel, a lower end cover is arranged at the lower part of the cylinder barrel, a nut is arranged outside the cylinder barrel, a ball is arranged inside the cylinder barrel, two linear grooves are symmetrically arranged on the inner wall of the cylinder barrel, and the two linear grooves are communicated with each other. The upper end cover and the lower end cover are respectively provided with a linear groove, the surface of the nut is symmetrically provided with linear grooves matched with the grooves of the cylinder barrel, the two sides of the nut are symmetrically provided with hole channels, and the hole channels, the cylinder barrel, the upper end cover and the lower end cover jointly form a closed groove loop. According to the utility model, sliding friction is replaced by rolling friction during movement of the balls, and the balls are in point contact or line contact with the grooves of the cylinder barrel, the grooves of the nut and the grooves of the end cover, so that the balls can smoothly flow in a groove loop, meanwhile, the frictional resistance in a traditional sliding structure is reduced, and the transmission efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric cylinder technical field especially relates to a kind of rolling type guiding structure of electric cylinder. BACKGROUND

[0002] In mechanical transmission, key connection is an important connection mode, which realizes the circumferential fixation between shaft and shaft parts through key, to facilitate the transmission of motion and torque, according to different needs, key connection can also provide additional functions, for example, in some types of key connection, axial fixation and axial force transmission can be realized;While in other types of key connection, movable connection in axial direction can be realized to meet the motion requirements under different working conditions.

[0003] However, in the field of electric cylinder technology, the existing traditional guiding structure mainly adopts the principle of sliding friction, the key and the key groove are usually in surface contact, this contact form can provide certain stability, but due to the large contact area, the friction resistance during movement is high, which directly affects the transmission efficiency. UTILITY MODEL CONTENT

[0004] In order to make up for the above shortcomings, the utility model provides a kind of rolling type guiding structure of electric cylinder, to improve the problem that some traditional guiding structures in prior art all adopt the principle of sliding friction, the key and the key groove are in surface contact, the movement resistance is large, resulting in low transmission efficiency.

[0005] To achieve the above purpose, the utility model provides the following technical scheme:

[0006] A kind of rolling type guiding structure of electric cylinder, including cylinder, the upper part of the cylinder is equipped with upper end cover, the lower part of the cylinder is equipped with lower end cover, the outer part of the cylinder is equipped with nut, the inner part of the cylinder is equipped with ball.

[0007] Further, the inner wall of the cylinder is provided with two straight grooves symmetrically.

[0008] Further, the upper end cover and the lower end cover are provided with straight grooves respectively.

[0009] Further, the surface of the nut is provided with straight grooves symmetrically matched with the grooves of the cylinder.

[0010] Further, the two sides of the nut are provided with channels symmetrically, and the channels form a closed groove loop together with the cylinder, the upper end cover and the lower end cover.

[0011] Further, the ball is arranged in the groove loop and forms annular arrangement and circulation in the loop.

[0012] Further, the upper end cover and the lower end cover are fixed on the nut to shield the groove slide.

[0013] Further, the cross section of the groove slide is at an angle a with the axial center line of the cylinder.

[0014] The utility model has the advantages of the following beneficial effects:

[0015] In the utility model, when the electric cylinder works, the nut moves axially along the inner wall of the cylinder, the ball is in the groove loop, and the rolling friction is used to replace the sliding friction, point contact or line contact is formed between the cylinder groove, the nut groove and the end cover groove, the ball circulates smoothly in the loop, friction resistance is reduced, and the supporting and guiding effects are provided, when the nut moves, the ball moves along the cylinder groove, is guided into the channel through the groove of the end cover, and then returns to the cylinder groove, so that the closed circulation is formed, and the stability of movement is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 The utility model provides a kind of end cover structure schematic diagram of the rolling type guiding structure of electric cylinder proposed by the utility model;

[0017] Fig. 2 The utility model provides a kind of ball structure schematic diagram of the rolling type guiding structure of electric cylinder proposed by the utility model.

[0018] LEGEND:

[0019] 1, upper end cover;2, cylinder;3, nut;4, ball;5, lower end cover. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the range of protection of the utility model.

[0021] WITH REFERENCE Figs. 1-2 The utility model provides an embodiment: a kind of rolling type guiding structure of electric cylinder, including cylinder 2, cylinder 2 upper portion is equipped with upper end cover 1, cylinder 2 lower portion is equipped with lower end cover 5, cylinder 2 outside is equipped with nut 3, cylinder 2 inside is equipped with ball 4, cylinder 2 inner wall is equipped with two straight grooves symmetrically, upper end cover 1 and lower end cover 5 are equipped with straight groove respectively, the surface of nut 3 is equipped with the straight groove matched with cylinder 2 groove symmetrically, nut 3 two sides are equipped with channel symmetrically, channel and cylinder 2, upper end cover 1 and lower end cover 5 jointly form closed groove loop, ball 4 is arranged in groove loop, and annular arrangement and circulation flow are formed in loop, upper end cover 1 and lower end cover 5 are fixed on nut 3 to shield groove slide, the cross section of groove slide is at an angle a with the axial center line of cylinder 2.

[0022] Specifically, when the electric cylinder works, the nut 3 moves axially along the inner wall of the cylinder barrel 2, and is guided and supported by the ball 4, the ball 4 is arranged in the closed loop formed by the groove of the cylinder barrel 2, the groove of the nut 3 and the groove of the end cover, and the movement of the ball 4 in the loop relies on rolling friction instead of sliding friction, and the contact form is point contact or line contact, which greatly reduces the frictional resistance compared with the traditional sliding friction, improves the movement efficiency, and the ball 4 transmits movement and force by rolling between the grooves, so that the axial movement of the nut 3 on the inner wall of the cylinder barrel 2 is more stable, the ball 4 realizes circulation through the hole on both sides of the nut 3, when the nut 3 moves forward, the ball 4 moves along the groove of the cylinder barrel 2 and provides support and guidance for the nut 3, when the ball 4 reaches the groove of the end cover, it is guided into the hole through the groove on the end cover, and then the ball 4 reenters the groove of the cylinder barrel 2 to continue to support and guide, in this way, the ball 4 is always in a continuous and closed loop, the closed groove loop ensures the stability of the ball 4 in the movement, and the point contact between the ball 4 and the groove reduces the contact friction coefficient, further improving the working efficiency of the electric cylinder, in addition, the angle design of the groove slide also optimizes the circulation path of the ball 4, avoiding the problems of jamming or uneven movement of the ball 4 in high-speed movement, ensuring that it can still maintain stability under high load and high speed conditions.

[0023] Working principle: when the electric cylinder works, the nut 3 moves axially along the inner wall of the cylinder barrel 2, and since the ball 4 is in the groove loop, the ball 4 relies on rolling friction instead of sliding friction in the movement, and forms point contact or line contact with the groove of the cylinder barrel 2, the groove of the nut 3 and the groove of the end cover, so that the ball 4 can circulate smoothly in the groove loop, while reducing the frictional resistance in the traditional sliding structure, the ball 4 circulates through the hole on both sides of the nut 3, when the nut 3 moves forward, the ball 4 moves along the groove of the cylinder barrel 2 and provides support and guidance for the nut 3; when the ball 4 reaches the groove of the end cover, it is guided into the hole through the groove on the end cover, and then returns to the groove of the cylinder barrel 2 to continue to support and guide, through the closed groove structure, the ball 4 can realize continuous circulation, so as to ensure the stability and efficiency of the movement.

[0024] Finally, it should be pointed out that: the above only describes the preferred embodiments of the present application, and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. Rolling guide structure of an electric cylinder comprising a cylinder barrel (2), characterized in that: The upper end cover (1) is installed on the upper part of the cylinder (2), the lower end cover (5) is installed on the lower part of the cylinder (2), the nut (3) is installed on the outside of the cylinder (2), and the ball (4) is installed in the inside of the cylinder (2).

2. A rolling guide structure for an electric cylinder according to claim 1, characterized by: Two straight grooves are symmetrically arranged on the inner wall of the cylinder (2).

3. The rolling guide structure of an electric cylinder according to claim 1, characterized by: The upper end cover (1) and the lower end cover (5) are respectively provided with straight grooves.

4. The rolling guide structure of an electric cylinder according to claim 1, characterized by: The surface of the nut (3) is symmetrically provided with straight grooves matched with the grooves of the cylinder (2).

5. The rolling guide structure of an electric cylinder according to claim 1, characterized by: The two sides of the nut (3) are symmetrically provided with channels, which together with the cylinder (2), the upper end cover (1) and the lower end cover (5) form a closed groove loop.

6. A rolling guide structure for an electric cylinder according to claim 1, characterized by: The ball (4) is arranged in the groove loop and forms annular arrangement and circulating flow in the loop.

7. The rolling guide structure of an electric cylinder according to claim 1, characterized by: The upper end cover (1) and the lower end cover (5) are fixed on the nut (3) to shield the groove slide.

8. The rolling guide structure of an electric cylinder according to claim 1, characterized by: The cross section of the groove slide is at an angle α with the axial center line of the cylinder (2). The cross section of the groove slide is at an angle α with the axial center line of the cylinder (2).

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