CN214196816U

CN214196816U - Electric hydraulic cylinder

Info

Publication number: CN214196816U
Application number: CN202120132617.4U
Authority: CN
Inventors: 王玉华; 夏江南
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-19
Filing date: 2021-01-19
Publication date: 2021-09-14
Anticipated expiration: 2031-01-19

Abstract

The utility model belongs to the technical field of the hydraulic press technique and specifically relates to an electricity hydraulic cylinder is related to. This digital electrohydraulic cylinder includes: a clutch; the number of the clutches is multiple, and the clutches are divided into two groups and oppositely arranged; the two groups of clutches which are arranged oppositely are connected through a ball screw; the ball screw comprises a screw rod sleeve; the screw rod sleeve is connected with a plurality of push rods, the end parts of one part of the push rods are connected with the screw rod sleeve, and the middle parts of the other part of the push rods are connected with the screw rod sleeve; two ends of the push rod are respectively connected with a push cylinder; the pushing cylinders arranged at the two ends of the pushing rods are connected to the two ends of the bidirectional hydraulic cylinder through pipelines respectively. The utility model relates to an electric hydraulic cylinder, when the hydraulic cylinder acts, the clutch works; when the hydraulic cylinder stops at a certain position, the clutch stops working, noise is not generated, components such as an overflow valve and the like required by the existing hydraulic press are avoided, and the failure rate of equipment is reduced.

Description

Electric hydraulic cylinder

Technical Field

The utility model belongs to the technical field of the hydraulic press technique and specifically relates to an electricity hydraulic cylinder is related to.

Background

At present, a squirrel cage motor is adopted in a traditional hydraulic machine, an oil pump, a control valve and the like are used as main elements of the hydraulic machine, and more components are prone to failure; the motor and the oil pump are always in working states, so that electric energy is increased, noise is constant, and hearing of workers is affected.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electrohydraulic cylinder, this electrohydraulic cylinder can solve the big, fragile, the big problem of power consumption of current hydraulic press noise of operation.

The utility model provides an electric hydraulic cylinder, include: a clutch; the number of the clutches is multiple, and the clutches are divided into two groups and oppositely arranged; the two groups of clutches which are arranged oppositely are connected through a ball screw; the ball screw comprises a screw rod sleeve; the screw rod sleeve is connected with a plurality of push rods, the end parts of one part of the push rods are connected with the screw rod sleeve, and the middle parts of the other part of the push rods are connected with the screw rod sleeve; two ends of the push rod are respectively connected with a push cylinder; the pushing cylinders arranged at the two ends of the pushing rods are connected to the two ends of the bidirectional hydraulic cylinder through pipelines respectively.

Wherein, the clutch is an electromagnetic clutch.

Wherein the number of the clutches is two; the two clutches are oppositely arranged, and the working ends of the two clutches are connected through a ball screw.

Wherein the ball screw further comprises: a screw rod; the screw rod sleeve axially moves along the screw rod is sleeved on the screw rod; and the two ends of the screw rod are respectively and fixedly connected with the clutches.

Wherein the push rod includes: a first push rod and a second push rod; the end part of the first push rod is connected with the screw rod sleeve; the middle part of the second push rod is connected with the screw rod sleeve.

Wherein the push cylinder includes: the device comprises a first pushing cylinder, a second pushing cylinder, a third pushing cylinder and a fourth pushing cylinder; the two ends of the first push rod are respectively connected with a first push cylinder and a second push cylinder, the connecting end of the first push rod and the first push cylinder is arranged at the inlet of the first push cylinder, and the other end of the first push rod is arranged at the bottom of the second push cylinder; the two ends of the second push rod are respectively connected with a third push cylinder and a fourth push cylinder, the connecting end of the second push rod and the third push cylinder is arranged at the bottom of the third push cylinder, and the other end of the second push rod is arranged at the inlet end of the fourth push cylinder.

Wherein the pipeline comprises a first pipeline and a second pipeline; one ends of the first pushing cylinder and the third pushing cylinder, which are far away from the pushing rod, are connected with one end of the hydraulic cylinder through a first pipeline, and one ends of the second pushing cylinder and the fourth pushing cylinder, which are far away from the pushing rod, are connected with the other end of the hydraulic cylinder through a second pipeline; and hydraulic oil is filled in the pipeline.

And the joints of the first pushing cylinder and the third pushing cylinder with the first pipeline and the joints of the second pushing cylinder and the fourth pushing cylinder with the second pipeline are respectively provided with an electric control reversing valve.

Wherein the pipeline further comprises a third pipeline; the third pipeline is communicated with the first pipeline and the second pipeline; an oil pump constant-pressure device is arranged on the third pipeline; and a one-way pressure retaining valve for preventing hydraulic oil from flowing back into the oil pump constant pressure device is respectively arranged on the oil pump constant pressure device and a third pipeline between the first pipeline and the second pipeline.

The utility model discloses beneficial effect: an electro-hydraulic cylinder, when the hydraulic cylinder acts, the clutch works; when the hydraulic cylinder stops at a certain position, the clutch stops working, and noise is not generated; the action coordination of the pushing cylinder assembly and the hydraulic cylinder is realized by pushing hydraulic oil, and the action of pushing the cylinder assembly is realized by controlling the ball screw through the clutch, so that overflow valves and other components required by the existing hydraulic machine are avoided, and the equipment failure rate is reduced.

The utility model relates to a clutch of electricity hydraulic cylinder adopts the automatically controlled switching-over valve of electromagnetic clutch cooperation to use jointly, makes things convenient for the switching of the business turn over hydraulic oil of two-way pneumatic cylinder, makes things convenient for numerical control equipment's intervention, and the suitability is strong.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is the utility model relates to an electric hydraulic cylinder schematic diagram.

Description of reference numerals:

1. a clutch;

2. a ball screw; 21. a screw rod sleeve; 22. a screw rod;

3. a push rod; 31. a first push rod; 32. a second push rod;

4. a pushing cylinder; 41. a first push cylinder; 42. a second push cylinder; 43. a third push cylinder; 44. a fourth push cylinder;

5. a pipeline; 51. a first pipeline; 52. a second pipeline; 53. a third pipeline;

6. a hydraulic cylinder;

7. an oil pump constant pressure device;

8. a one-way pressure retaining valve;

9. an electrically controlled directional valve.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" 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 to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. 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, an electro-hydraulic cylinder includes: a clutch 1; the number of the clutches 1 is 2, and the 2 clutches 1 are oppositely arranged; the two oppositely arranged clutches 1 are connected through a ball screw 2; the ball screw 2 comprises a screw sleeve 21; the screw rod sleeve 21 is connected with two push rods 3, the end part of one push rod 3 is connected with the screw rod sleeve 21, and the middle part of the other push rod 3 is connected with the screw rod sleeve 21; two ends of the push rod 3 are respectively connected with a push cylinder 4; and the four pushing cylinders 4 which are arranged at the two ends of the two pushing rods 3 are respectively connected with the two ends of the two-way hydraulic cylinder 6 through pipelines 5.

Specifically, the clutch 1 is an electromagnetic clutch 1.

The electromagnetic clutch 1 has the characteristics of high reaction speed, long service life and convenience in maintenance. The service life of the electro-hydraulic cylinder in the technology can be prolonged.

Specifically, the ball screw 2 further includes: a screw rod 22; the screw rod 22 is sleeved with the screw rod sleeve 21 which moves along the axial direction of the screw rod; the two ends of the screw rod 22 are fixedly connected with the clutch 1 respectively.

One of the two clutches 1 works actively, the working end drives the screw rod 22 to rotate, and the clutch 1 connected with the other end of the screw rod 22 works in a driven mode.

When the screw 22 rotates, the screw sleeve 21 sleeved on the screw 22 can move along the axial direction of the screw 22, so that the push rod 3 connected with the screw sleeve 21 moves.

Specifically, the push rod 3 includes: a first push lever 31 and a second push lever 32; the end of the first push rod 31 is connected with the lead screw sleeve 21; the middle part of the second push rod 32 is connected with the lead screw sleeve 21.

The first push rod 31 is used for controlling the push cylinders 4 at two ends of the first push rod 31 to work, and the two push cylinders 4 are used for feeding in and discharging out to finish the discharge and feeding of hydraulic oil.

The second push rod 32 and the push cylinder 4 connected to both ends operate on the same principle as the first push rod 31, except that only the direction of operation is reversed.

Specifically, the push cylinder 4 includes: a first push cylinder 41, a second push cylinder 42, a third push cylinder 43, and a fourth push cylinder 44; the two ends of the first push rod 31 are respectively connected with a first push cylinder 41 and a second push cylinder 42, the connecting end of the first push rod 31 and the first push cylinder 41 is arranged at the inlet of the first push cylinder 41, and the other end of the first push rod 31 is arranged at the bottom of the second push cylinder 42; the two ends of the second push rod 32 are respectively connected with a third push cylinder 43 and a fourth push cylinder 44, the connecting end of the second push rod 32 and the third push cylinder 43 is arranged at the bottom of the third push cylinder 43, and the other end of the second push rod 3 is arranged at the inlet end of the fourth push cylinder 44.

The first pushing cylinder 41 and the second pushing cylinder 42 are respectively provided at both ends of the first pushing rod 31.

The first pushing cylinder 41 and the third pushing cylinder 43 work in opposite directions.

The first push rod 31 directly reciprocates in the first push cylinder 41 and the second push cylinder 42. So that the hydraulic oil in the first and

second push cylinders

41 and 42 reciprocates in and out.

The second push rod 32 and the third and

fourth push cylinders

43 and 44 operate on the same principle as the second push cylinder 42, but in opposite directions.

Specifically, the pipeline 5 includes a first pipeline 51 and a second pipeline 52; one ends of the first pushing cylinder 41 and the third pushing cylinder 43, which are far away from the pushing rod 3, are connected with one end of the hydraulic cylinder 6 through a first pipeline 51, and one ends of the second pushing cylinder 42 and the fourth pushing cylinder 44, which are far away from the pushing rod 3, are connected with the other end of the hydraulic cylinder 6 through a second pipeline 52; and hydraulic oil is filled in the pipeline 5.

The hydraulic oil in the cylinder 4 is pushed to move back and forth into the pipeline 5.

And the electrically controlled reversing valves 9 are respectively arranged at the joints of the first pushing cylinder 41 and the third pushing cylinder 43 with the first pipeline 51 and at the joints of the second pushing cylinder 42 and the fourth pushing cylinder 44 with the second pipeline 52.

In order to ensure the stability of one pipeline 5 applied to two push cylinders 4, the first pipeline 51 is shared by the first push cylinder 41 and the third push cylinder 43, an electrically controlled reversing valve 9 is arranged at the joint of the first pipeline 51 and the

third push cylinder

41 and 43, and the communication state between the pipeline 5 and the first push cylinder 41 or the third push cylinder 43 can be changed through the electrically controlled reversing valve 9.

The connection of the electrically controlled direction valve 9 at the connection of the second and

fourth push cylinders

42, 44 and the second pipeline 52 and the connection of the first and

third push cylinders

41, 43 and the first pipeline 51 are provided with the electrically controlled direction valve 9.

Specifically, the pipeline 5 further includes a third pipeline 53; the third pipe 53 communicates the first pipe 51 and the second pipe 52; and an oil pump constant pressure device 7 is provided on the third pipe 53; and a third pipeline 53 between the oil pump constant pressure device 7 and the first pipeline 51 and the second pipeline 52 is respectively provided with a one-way pressure retaining valve 8 for preventing hydraulic oil from flowing back into the oil pump constant pressure device 7.

The third pipeline 53 is used in the present technology to ensure that the quantity of the hydraulic oil entering the two cavities of the hydraulic cylinder 6 is the same, so as to ensure the stability of the operation of the hydraulic cylinder, and an oil pump constant pressure device 7 is arranged on the third pipeline 53 in order to ensure the stability (the oil pump constant pressure device 7 is of the conventional structure and is used for supplementing the pipeline 5 with the hydraulic oil).

The one-way pressure retaining valve 8 arranged in the third pipeline 53 can ensure that hydraulic oil cannot flow back to the oil pump constant pressure device 7 when the hydraulic cylinder 6 works.

The working principle is as follows:

one clutch 1 works actively, and the screw rod 22 connected with the clutch rotates to drive the other clutch 1 to work in a driven mode.

The screw rod sleeve 21 sleeved on the screw rod 22 moves along the axial direction of the screw rod 22, and in the moving process, the two push rods 3 connected with the screw rod sleeve 21 move along with the screw rod sleeve.

When the first push rod 31 moves towards the second push cylinder 42, the hydraulic oil in the second push cylinder 42 is pushed into the hydraulic cylinder 6; at the same time, the second push rod 32 moves synchronously, hydraulic oil enters the third push cylinder 43, and hydraulic oil in the fourth push cylinder 44 is discharged into the second pipeline 52 and enters one cavity of the bidirectional hydraulic cylinder 6 through the second pipeline 52. After a period of operation, in order to balance the hydraulic oil in the pipeline 5, the oil pump constant pressure device 7 is controlled to deliver oil into the pipeline 5, so that the hydraulic oil at the two ends of the hydraulic cylinder 6 is in a balanced state. The one-way pressure retaining valve 8 can ensure that the hydraulic oil does not flow reversely.

In the technology, the sizes of two groups of push cylinders 4 are changed under the condition that the volumes of a first push cylinder 41, a third push cylinder 43, a second push cylinder 42 and a fourth push cylinder 44 are inconvenient, (the first push cylinder 41 and the third push cylinder 43 are one group, the second push cylinder 42 and the fourth push cylinder 44 are the other group, and the sizes of the push cylinders 4 are the same), when a hydraulic cylinder 6 is stopped at a certain position, the clutch 1 stops working, and no noise is generated; the action coordination of the pushing cylinder 4 assembly and the hydraulic cylinder 6 is realized by pushing hydraulic oil, and the action of the pushing cylinder 4 assembly is realized by controlling the ball screw 2 by the clutch 1, so that the components such as an overflow valve and the like required by the existing hydraulic machine are avoided, and the equipment failure rate is reduced.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. An electro-hydraulic cylinder, comprising:

a clutch; the number of the clutches is multiple, and the clutches are divided into two groups and oppositely arranged; the two groups of clutches which are arranged oppositely are connected through a ball screw;

the ball screw comprises a screw rod sleeve; the screw rod sleeve is connected with a plurality of push rods, the end parts of one part of the push rods are connected with the screw rod sleeve, and the middle parts of the other part of the push rods are connected with the screw rod sleeve;

two ends of the push rod are respectively connected with a push cylinder;

the pushing cylinders arranged at the two ends of the pushing rods are connected to the two ends of the bidirectional hydraulic cylinder through pipelines respectively.

2. The electro-hydraulic cylinder of claim 1, wherein the clutch is an electromagnetic clutch.

3. The electro-hydraulic cylinder as defined in claim 2 wherein the number of said clutches is two; the two clutches are oppositely arranged, and the working ends of the two clutches are connected through a ball screw.

4. The electric hydraulic cylinder as recited in claim 2, wherein the ball screw further comprises: a screw rod; the screw rod sleeve axially moves along the screw rod is sleeved on the screw rod; and the two ends of the screw rod are respectively and fixedly connected with the clutches.

5. The electro-hydraulic cylinder as defined in claim 1, wherein the push rod comprises: a first push rod and a second push rod; the end part of the first push rod is connected with the screw rod sleeve; the middle part of the second push rod is connected with the screw rod sleeve.

6. The electric hydraulic cylinder as recited in claim 5, wherein the push cylinder comprises: the device comprises a first pushing cylinder, a second pushing cylinder, a third pushing cylinder and a fourth pushing cylinder; the two ends of the first push rod are respectively connected with a first push cylinder and a second push cylinder, the connecting end of the first push rod and the first push cylinder is arranged at the inlet of the first push cylinder, and the other end of the first push rod is arranged at the bottom of the second push cylinder; the two ends of the second push rod are respectively connected with a third push cylinder and a fourth push cylinder, the connecting end of the second push rod and the third push cylinder is arranged at the bottom of the third push cylinder, and the other end of the second push rod is arranged at the inlet end of the fourth push cylinder.

7. The electro-hydraulic cylinder of claim 6, wherein the conduit comprises a first conduit and a second conduit; one ends of the first pushing cylinder and the third pushing cylinder, which are far away from the pushing rod, are connected with one end of the hydraulic cylinder through a first pipeline, and one ends of the second pushing cylinder and the fourth pushing cylinder, which are far away from the pushing rod, are connected with the other end of the hydraulic cylinder through a second pipeline; and hydraulic oil is filled in the pipeline.

8. The electric hydraulic cylinder according to claim 7, wherein the joints of the first pushing cylinder and the third pushing cylinder with the first pipeline and the joints of the second pushing cylinder and the fourth pushing cylinder with the second pipeline are respectively provided with an electric control reversing valve.

9. The electro-hydraulic cylinder of claim 7, wherein the conduit further comprises a third conduit; the third pipeline is communicated with the first pipeline and the second pipeline; an oil pump constant-pressure device is arranged on the third pipeline; and a one-way pressure retaining valve for preventing hydraulic oil from flowing back into the oil pump constant pressure device is respectively arranged on the oil pump constant pressure device and a third pipeline between the first pipeline and the second pipeline.