CN217545784U - Servo electric cylinder - Google Patents

Abstract

The utility model discloses a servo electric cylinder, including the cylinder, the one end of cylinder is provided with the front end housing, and the other end of cylinder is provided with the rear end cap, is provided with oilless bearing on the front end housing, is provided with the ball bearing on the rear end cap, has a lead screw to pass in the cylinder, and the one end of lead screw is passed outside the ball bearing stretches out the rear end cap, and the lead screw is gone up the cover and is provided with push rod, piston cylinder and the slip nut cover of tube-shape, and the internal diameter of push rod and the internal diameter of piston cylinder all are greater than the external diameter of lead screw, and the slip nut cover constitutes the screw thread pair with the lead screw, and outside the one end of push rod was passed oilless bearing and is stretched out the front end housing, the other end of push rod was together fixed with piston cylinder and slip nut cover three, installs servo motor on the rear end cap, the lead screw one end with servo motor's output shaft passes through the coupling joint and is in the same place. The utility model discloses a servo electronic jar can convert servo motor's rotary motion into the linear motion of push rod, realizes the accurate reciprocating motion of servo electronic jar's push rod.

Description

Servo electric cylinder

Technical Field

The utility model relates to a drive mechanism technical field specifically is a servo electronic jar.

Background

To achieve linear motion of the push rod in some transmission mechanisms, a conventional air cylinder or hydraulic cylinder can achieve linear motion of the push rod, but the conventional air cylinder or hydraulic cylinder has some disadvantages, including:

(1) Because the traditional air cylinder and hydraulic cylinder are controlled in two stages, the starting and stopping of the push rod at any position in the motion range can not be realized, the control of any speed can not be realized, and the control of multiple stages can not be realized;

(2) The traditional air cylinder and hydraulic cylinder have poor precision, and the working speed and acceleration of the air cylinder and the hydraulic cylinder cannot be accurately controlled;

(3) The power of traditional cylinder and pneumatic cylinder is gas and oil, and gas and oil are the unstable material, and temperature and density can produce very big influence to its pressure and displacement, and the situation that can appear oil leak gas leakage has been long-lived, can be difficult to reach the operation requirement of product, and the operating pressure and the displacement of cylinder, pneumatic cylinder are difficult to guarantee, and oil leak gas leakage also can cause the pollution of environment, and work efficiency is not high.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides a following technical scheme: the utility model provides a servo electric cylinder, includes the cylinder, the one end of cylinder is provided with the front end housing, the other end of cylinder is provided with the rear end cap, be provided with oil-free bearing on the front end cap, be provided with the ball bearing on the rear end cap, a lead screw passes in the cylinder, the one end of lead screw is passed the ball bearing stretches out outside the rear end cap, the lead screw upper cover is provided with push rod, piston barrel and the slip nut cover of tube-shape, the internal diameter of push rod and the internal diameter of piston barrel all are greater than the external diameter of lead screw, slip nut cover constitutes the screw thread pair with the lead screw, the one end of push rod is passed oil-free bearing and is stretched out outside the front end cap, the other end of push rod is together fixed with piston barrel and slip nut cover three, the other end of push rod all is located with piston barrel and slip nut cover three in the cylinder, install servo motor on the rear end cap, the lead screw the one end with servo motor's output shaft passes through the shaft coupling and is in the same place.

Preferably, the screw is a ball screw.

Preferably, the push rod is coaxial with the screw rod.

Preferably, the inner wall of the cylinder barrel is axially provided with a guide groove, the outer peripheral surface of the piston barrel is provided with a convex guide block, and the guide block extends into the guide groove.

Preferably, a sealing groove is radially formed in the inner wall of the front end cover, a sealing ring is arranged in the sealing groove, and the sealing ring is sleeved on the push rod.

Preferably, the piston cylinder is radially provided with a magnetic ring and a wear-resisting ring.

Compared with the prior art, the beneficial effects of the utility model are that: the servo motor is combined with the motion cylinder, the torque is transmitted through the servo motor to drive the screw rod to rotate, the screw rod drives the sliding nut sleeve and the push rod to do linear motion, the rotary motion of the servo motor is converted into the linear motion of the push rod, so that the precise reciprocating motion of the push rod of the servo electric cylinder is realized, the servo motor can perform any speed, torque and position control within a set range, the precision of the ball screw rod is high, the multi-stage control, any speed and acceleration control of the push rod in the electric cylinder can be realized, and the control precision can reach +/-0.01 mm- +/-0.02 mm.

Drawings

Fig. 1 is a schematic structural view of the servo electric cylinder of the present invention without a servo motor;

FIG. 2 isbase:Sub>A cross-sectional view A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

fig. 4 is a schematic structural perspective view of the servo electric cylinder of the present invention;

fig. 5 is a schematic structural view of the servo electric cylinder of the present invention.

In the figure: 1. a rear end cap; 2. a cylinder barrel; 3. a front end cap; 4. a push rod; 5. a screw rod; 6. a sliding nut sleeve; 7. a piston cylinder; 8. a guide block; 9. a magnetic ring; 10. a wear ring; 11. a ball bearing; 12. an oilless bearing; 13. a seal ring; 14. a guide groove; 15. seal groove, 16, servo motor.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or both elements may be in communication. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 5, the present invention provides an embodiment: the utility model provides a servo electric cylinder, includes cylinder 2, the one end of cylinder 2 is provided with front end housing 3, the other end of cylinder 2 is provided with rear end housing 1, be provided with oil-free bearing 12 on the front end housing 3, be provided with ball bearing 11 on the rear end housing 1, there is a lead screw 5 to pass in the cylinder 2, the one end of lead screw 5 is passed ball bearing 11 and is stretched out outside rear end housing 1, the upper cover of lead screw 5 is provided with push rod 4, piston tube 7 and the slip nut cover 6 of tube-shape, the internal diameter of push rod 4 and the internal diameter of piston tube 7 all are greater than the external diameter of lead screw 5, slip nut cover 6 constitutes the screw thread pair with lead screw 5, the one end of push rod 4 is passed oil-free bearing 12 and is stretched out outside front end housing 3, the other end of push rod 4 is together fixed with piston tube 7 and slip nut cover 6 three, the other end of push rod 4 and piston tube 7 and slip nut cover 6 three are all located in cylinder 2, install servo motor 16 on the rear end housing 1, one end of lead screw 5 with the output shaft coupling links together.

Preferably, the screw 5 is a ball screw, and has a large bearing capacity.

Preferably, the push rod 4 is coaxial with the screw rod 5.

Preferably, a guide groove 14 is axially formed in the inner wall of the cylinder tube 2, a protruding guide block 8 is arranged on the outer circumferential surface of the piston tube 7, and the guide block 8 extends into the guide groove 14.

The utility model discloses servo electronic jar during operation, servo motor 16 drives lead screw 5 rotatory, because lead screw 5 is fixed in the ball bearing, so lead screw 5 can not be the rectilinear movement and only can rotate, just drive slip nut cover 6 and slide on lead screw 5 when lead screw 5 is rotatory like this, and because guide block 8 receives the restriction of guide way 14, so guide block 8 can only be in the guide way 14 rectilinear sliding, slip nut cover 6 and piston cylinder 7 and push rod 4 just can only be in cylinder 2 rectilinear sliding, servo motor 16's output shaft corotation or reversal, then push rod 4 just gos forward or retreat, realize the rectilinear reciprocating motion of push rod 4 through servo motor 16, because servo motor can be at its within range arbitrary control rotational speed and acceleration, the position of the removal that can accurate control push rod 4, moving speed and acceleration, push rod 4's movement control precision can reach 0.01 mm- +/-0.02 mm, push rod 4's moving speed is fast, the precision is high, there is not traditional cylinder, hydraulic cylinder oil gas leaks.

Preferably, radially be provided with seal groove 15 on the inner wall of front end housing 3, be provided with sealing washer 13 in the seal groove 15, sealing washer 13 cover is established on push rod 4, and sealing washer 13 is sealed between to push rod 4 and cylinder 2, prevents to have lubricating oil to leak.

Preferably, the piston cylinder 7 is radially provided with a magnetic ring 9 and a wear-resistant ring 10, and the wear-resistant ring 10 can reduce the wear of the piston cylinder 7 and prolong the service life of the piston cylinder 7.

It is obvious to the person skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, and may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (6)

1. The utility model provides a servo electronic jar, includes the cylinder, the one end of cylinder is provided with the front end housing, the other end of cylinder is provided with rear end cap, its characterized in that: the oil-free bearing is arranged on the front end cover, a ball bearing is arranged on the rear end cover, a lead screw penetrates through the cylinder barrel, one end of the lead screw penetrates through the ball bearing and extends out of the rear end cover, a cylindrical push rod, a piston barrel and a sliding nut sleeve are arranged on the lead screw in a sleeved mode, the inner diameter of the push rod and the inner diameter of the piston barrel are larger than the outer diameter of the lead screw, the sliding nut sleeve and the lead screw form a thread pair, one end of the push rod penetrates through the oil-free bearing and extends out of the front end cover, the other end of the push rod is fixed with the piston barrel and the sliding nut sleeve together, the other end of the push rod, the piston barrel and the sliding nut sleeve are located in the cylinder barrel, a servo motor is arranged on the rear end cover, and one end of the lead screw is connected with an output shaft of the servo motor through a coupler.

2. The servo electric cylinder according to claim 1, wherein: the screw is a ball screw.

3. The servo electric cylinder according to claim 1, characterized in that: the push rod is coaxial with the screw rod.

4. The servo electric cylinder according to claim 1, characterized in that: the piston cylinder is characterized in that a guide groove is axially formed in the inner wall of the cylinder barrel, a protruding guide block is arranged on the outer peripheral surface of the piston barrel, and the guide block extends into the guide groove.

5. The servo electric cylinder according to claim 1, characterized in that: the inner wall of the front end cover is radially provided with a sealing groove, a sealing ring is arranged in the sealing groove, and the sealing ring is sleeved on the push rod.

6. The servo electric cylinder according to claim 1, characterized in that: and a magnetic ring and a wear-resistant ring are radially arranged on the piston cylinder.

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