CN221144883U

CN221144883U - Power cylinder and working machine

Info

Publication number: CN221144883U
Application number: CN202323009432.2U
Authority: CN
Inventors: 刘大昌
Original assignee: Loudi Zhongxing Hydraulic Parts Co Ltd
Current assignee: Loudi Zhongxing Hydraulic Parts Co Ltd
Priority date: 2023-11-07
Filing date: 2023-11-07
Publication date: 2024-06-14
Anticipated expiration: 2033-11-07

Abstract

The utility model relates to the field of executing elements, and provides a power cylinder and a working machine. The power cylinder includes: the piston is arranged in the cylinder body and is in sliding fit with the cylinder body, the piston rod is connected with the piston, and the piston rod extends out of the cylinder body; a magnet connected to the piston rod or the piston; the sensor is used for detecting the position of the magnet, the sensor is arranged on the outer side of the cylinder body, and the sensor extends along the axial direction of the piston rod. Through setting up the sensor in the outside of cylinder body, the sensor need not to stretch into the inside of piston rod, and the sensor can not contact with the piston rod, therefore the sensor can not produce interference or friction with the piston rod to can reduce the sensor and the problem that the piston rod interfered or rubbed and damaged.

Description

Power cylinder and working machine

Technical Field

The utility model relates to the technical field of executing elements, in particular to a power cylinder and a working machine.

Background

In the field of fluid transmissions, actuators typically include power cylinders, including hydraulic and pneumatic cylinders. In order to accurately control the motion of the power cylinder, the extension and retraction length of the piston rod of the power cylinder needs to be detected, and in the prior art, an internal sensor is generally adopted to detect the extension and retraction length of the piston rod of the power cylinder.

The built-in sensor typically includes a detection rod and a magnet. The piston rod of the power cylinder is provided with a mounting hole extending along the axial direction of the piston rod, and the magnet is arranged in the mounting hole. The detection rod penetrates into the power cylinder and extends into the mounting hole. When the piston rod of the power cylinder is displaced, the magnet on the piston rod moves relative to the detection rod, the detection rod can acquire the position information of the magnet, and the telescopic length of the piston rod can be acquired based on the position information of the magnet.

Although the built-in sensor in the prior art can detect the telescopic length of the piston rod of the power cylinder, the mounting of the built-in sensor requires that a mounting hole is formed in the piston rod by drilling the piston rod by a drilling machine. When the length of piston rod is great, the degree of depth of mounting hole is also great, and consequently the straightness accuracy of mounting hole is difficult to guarantee, produces inclination error easily, leads to producing interference or friction between flexible in-process measuring rod of piston rod and the mounting hole, causes measuring rod to damage easily, influences measuring rod's life-span.

Disclosure of utility model

The utility model provides a power cylinder and an operation machine, which are used for solving the defects that in the prior art, interference is generated between a detection rod and a mounting hole in the process of stretching a piston rod, the detection rod is easy to damage and the service life of the detection rod is influenced, and realizing the effect of avoiding interference and friction between the detection rod and the mounting hole of the piston rod.

The present utility model provides a power cylinder comprising:

The piston is arranged in the cylinder body and is in sliding fit with the cylinder body, the piston rod is connected with the piston, and the piston rod extends out of the cylinder body;

a magnet connected to the piston rod or the piston;

The sensor is used for detecting the position of the magnet, the sensor is arranged on the outer side of the cylinder body, and the sensor extends along the axial direction of the piston rod.

According to the power cylinder provided by the utility model, the power cylinder further comprises a mounting seat, the mounting seat is arranged on one side of the piston, which is close to the cylinder bottom of the power cylinder, the mounting seat is connected with the piston rod or the piston, and the magnet is mounted on the mounting seat.

According to the power cylinder provided by the utility model, the extension section is arranged at one end of the piston rod arranged in the cylinder body, and the mounting seat is sleeved on the extension section and connected with the extension section.

According to the power cylinder provided by the utility model, the power cylinder further comprises a fixing nut, the extension section comprises a positioning section and a connecting section, the positioning section is arranged at one end, close to the piston, of the extension section, the diameter of the positioning section is larger than that of the connecting section, a step hole is formed in the mounting seat, the thick end of the step hole is matched with the positioning section in a positioning way, a gap is reserved between the thin end of the step hole and the connecting section, the fixing nut is in threaded connection with one end, far away from the piston, of the connecting section, and the fixing nut abuts against the mounting seat.

According to the power cylinder provided by the utility model, the power cylinder further comprises a first set screw, the first set screw is in threaded connection with the mounting seat, and the first set screw abuts against the extension section.

According to the power cylinder provided by the utility model, the mounting seat is provided with the mounting groove, and the magnet is arranged in the mounting groove.

According to the power cylinder provided by the utility model, the power cylinder further comprises a second set screw, the second set screw is in threaded connection with the mounting seat, and the second set screw passes through the side wall of the mounting groove to prop against the magnet.

According to the power cylinder provided by the utility model, the power cylinder further comprises a support ring, the support ring is of an annular structure, the support ring is arranged in the cylinder body and is used for propping against the mounting seat, and an oil port of the rodless cavity of the power cylinder is communicated with an annular area of the support ring.

According to the power cylinder provided by the utility model, the power cylinder further comprises a cover body, wherein the cover body is arranged on the outer side of the sensor in a covering mode, and the cover body is connected with the cylinder body.

The utility model also provides a working machine comprising a power cylinder as described above.

According to the power cylinder provided by the utility model, the piston is slidably arranged in the cylinder body, the piston rod is connected with the piston and extends out of the cylinder body, and the piston can be driven to reciprocate by changing the flow direction of oil liquid, so that the piston can drive the piston rod to reciprocate.

The magnet is connected with the piston rod or the piston, so that the magnet can move along with the piston rod or the piston, the position information of the magnet can be detected through the sensor, and the telescopic length of the piston rod can be obtained based on the position information of the magnet due to synchronous movement of the magnet and the piston rod or the piston.

Through setting up the sensor in the outside of cylinder body, the sensor need not to stretch into the inside of piston rod, and the sensor can not contact with the piston rod, therefore the sensor can not produce interference or friction with the piston rod to can reduce the sensor and the problem that the piston rod interfered or rubbed and damaged.

In addition, through setting up the sensor in the outside of cylinder body, need not to set up the mounting hole on the piston rod, can reduce the processing degree of difficulty of piston rod to reduce the processing cost of back cock stem.

The working machine provided by the utility model comprises the power cylinder provided by the utility model, so that the working machine comprises all the advantages of the power cylinder,

Drawings

In order to more clearly illustrate the utility model or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a power cylinder provided in some embodiments of the utility model.

Reference numerals:

1. A cylinder; 2. a cylinder bottom; 3. a guide sleeve; 4. a piston; 5. a piston rod; 501. a positioning section; 502. a connection section; 6. a magnet; 7. a sensor; 8. a mounting base; 9. a first set screw; 10. a fixing nut; 11. a second set screw; 12. a support ring; 13. a cover body.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model provides a power cylinder and a working machine, aiming at solving the technical problems that in the prior art, interference is generated between a detection rod and a mounting hole in the process of stretching and retracting a piston rod, the detection rod is easy to damage and the service life of the detection rod is influenced, and realizing the technical effects of avoiding the interference and friction generated between the detection rod and the mounting hole of the piston rod.

The power cylinder provided in the embodiment of the present utility model is described below with reference to fig. 1.

Specifically, the power cylinder includes a cylinder body, a piston 4, a piston rod 5, a magnet 6, and a sensor 7. The power cylinder can be a hydraulic cylinder or an air cylinder.

The cylinder body comprises a cylinder barrel 1, a cylinder bottom 2 and a guide sleeve 3. The cylinder bottom 2 is arranged at one end of the cylinder barrel 1, and the guide sleeve 3 is arranged at one end of the cylinder barrel 1 far away from the cylinder bottom 2. The piston 4 is arranged in the cylinder body and is in sliding fit with the cylinder body, i.e. the piston 4 is slidably arranged in the cylinder tube 1. The piston rod 5 is connected with the piston 4, and the piston rod 5 extends out of the cylinder. The piston 4 is fixedly sleeved on the piston rod 5, and the piston rod 5 extends out through the guide sleeve 3 and is in sliding fit with the guide sleeve 3.

The magnet 6 is connected to the piston rod 5 or the piston 4 such that the magnet 6 can move with the piston rod 5 or the piston 4.

The sensor 7 is for detecting the position of the magnet 6, the sensor 7 is disposed outside the cylinder, and the sensor 7 is disposed extending in the axial direction of the piston rod 5. The principle of detecting the position of the magnet 6 by the sensor 7 can refer to the principle of the magnetostrictive displacement sensor 7 in the related art, and the application does not relate to the improvement of the sensor 7 and the detection principle thereof, so that the description thereof is omitted. The sensor 7 may be connected to the cylinder by a connection, for example a threaded connection.

In the power cylinder provided by the embodiment of the utility model, the piston 4 is slidably arranged in the cylinder body, the piston rod 5 is connected with the piston 4 and extends out of the cylinder body, and the piston 4 can be driven to reciprocate by changing the flow direction of oil, so that the piston 4 can drive the piston rod 5 to reciprocate.

By connecting the magnet 6 with the piston rod 5 or the piston 4 so that the magnet 6 can move with the piston rod 5 or the piston 4, the position information of the magnet 6 can be detected by the sensor 7, and the telescopic length of the piston rod 5 can be obtained based on the position information of the magnet 6 because the magnet 6 moves synchronously with the piston rod 5 or the piston 4.

By arranging the sensor 7 outside the cylinder, the sensor 7 does not need to extend into the piston rod 5, and the sensor 7 does not contact the piston rod 5, so that the sensor 7 does not interfere or rub with the piston rod 5, and the problem that the sensor 7 interferes or rubs with the piston rod 5 to damage the piston rod 5 can be reduced.

In addition, by arranging the sensor 7 outside the cylinder body, the mounting hole is not required to be arranged on the piston rod 5, and the processing difficulty of the piston rod 5 can be reduced, so that the processing cost of the rear plug rod is reduced.

In some embodiments provided by the present utility model, the power cylinder further comprises a mounting seat 8. The mount 8 is provided on a side of the piston 4 near the cylinder bottom 2 of the power cylinder, and the mount 8 is connected with the piston rod 5 or the piston 4, and the magnet 6 is mounted on the mount 8.

In this embodiment, by providing the mount 8, the mount 8 can be connected to the piston rod 5 or the piston 4, and the magnet 6 can be mounted on the mount 8, and by being mounted specifically on the magnet 6, the magnet 6 can be mounted conveniently.

In some embodiments of the utility model, the end of the piston rod 5 that is disposed in the cylinder is provided with an extension, in particular, the extension is disposed at the end of the piston rod 5 that is near the cylinder bottom 2, and the extension passes through the piston 4. The mounting seat 8 is sleeved on the extension section, and the mounting seat 8 is connected with the extension section.

In this embodiment, mount pad 8 suit is in the extension for the extension can provide better radial supporting effect and radial location effect for mount pad 8, avoids the in-process that piston rod 5 removed, and mount pad 8 is along the radial sideslip of piston rod 5, guarantees that magnet 6 on the mount pad 8 operates stably, thereby makes the position information of acquisition magnet 6 that sensor 7 can be stable, guarantees the detection precision to piston rod 5 telescopic length.

Further, the power cylinder also comprises a fixing nut 10. The extension section includes a positioning section 501 and a connecting section 502.

Wherein, the location section 501 is disposed at one end of the extension section near the piston 4, the connection section 502 is connected with the location section 501, and the connection section 502 is disposed at one end of the extension section near the cylinder bottom 2. The diameter of the positioning segment 501 is larger than the diameter of the connecting segment 502. A stepped hole is formed in the mounting seat 8, and the thick end of the stepped hole is in positioning fit with the positioning section 501, for example, the stepped hole is in transition fit or interference fit with the positioning section 501. A gap is provided between the thin end of the stepped bore and the connecting section 502.

The fixing nut 10 is screwed with the end of the connecting section 502 remote from the piston 4, and the fixing nut 10 abuts against the mounting seat 8.

In this embodiment, the thick end of the stepped hole of the mounting seat 8 is matched with the positioning section 501 in a positioning manner, so that the positioning section 501 can radially support and radially limit the mounting seat 8. The thick end of step hole and location section 501 locate fit have satisfied the support and the location effect to mount pad 8, if the thin end of linkage segment 502 and step hole also locate fit, the problem of interference appears easily, leads to mount pad 8 inconvenient to install on the extension section, has the clearance between the thin end of linkage segment 502 and step hole consequently, avoids appearing the problem of interference.

In addition, as described above, since the extension section needs to be positioned for the mount 8, the machining accuracy requirement of the extension section is high, so the machining difficulty is relatively high, and in this embodiment, the extension section includes the positioning section 501 and the connecting section 502, where only the positioning section 501 is used for positioning the mount 8, so that the finished part is shortened, and thus the machining difficulty of the extension section can be reduced.

Through fixation nut 10 and linkage segment 502 threaded connection to fixation nut 10 offsets with mount pad 8, can carry out axial positioning to mount pad 8, avoids mount pad 8 to deviate from the extension. Optionally, the hole shoulder of the stepped hole abuts against the end face of the positioning segment 501.

In some embodiments provided by the present utility model, the power cylinder further comprises a first set screw 9. The first set screw 9 is threaded with the mount 8 and the first set screw 9 abuts against the extension. Optionally, a first set screw 9 passes through the side wall of the mount 8 and abuts the extension.

In this embodiment, the first set screw 9 is in threaded connection with the mounting seat 8, and the first set screw 9 abuts against the extension section, so that an axial limiting effect can be formed on the mounting seat 8, and the mounting seat 8 is prevented from moving along the extension section.

Further, a first set screw 9 passes through the mounting block 8 and abuts against the locating section 501 of the extension section. Because the diameter of location section 501 is bigger than the diameter of linkage segment 502, offset with location section 501 through first holding screw 9, on the one hand can reduce the degree of depth with first holding screw 9 complex screw hole, reduce the processing degree of difficulty, on the other hand can reduce the screw degree of depth of first holding screw 9, reduce the assembly degree of difficulty.

In some embodiments of the present utility model, the mounting base 8 is provided with a mounting groove, and the magnet 6 is disposed in the mounting groove. Further, the notch of the mounting groove faces the sensor 7, so arranged that the sensor 7 can detect the position of the magnet 6 more accurately when the magnet 6 is mounted in the mounting groove.

In some embodiments provided by the present utility model, the power cylinder further comprises a second set screw 11, the second set screw 11 being threadedly coupled to the mount 8, and the second set screw 11 being disposed through a sidewall of the mounting slot against the magnet 6.

In this embodiment, the second set screw 11 is in threaded connection with the mounting seat 8, and the second set screw 11 passes through the side wall of the mounting groove and abuts against the magnet 6, so that a limiting effect can be formed on the magnet 6, the magnet 6 is prevented from falling out of the mounting groove, and the stability of the magnet 6 is ensured.

In some embodiments provided by the present utility model, the power cylinder further includes a support ring 12. The support ring 12 is of an annular structure, the support ring 12 is arranged in the cylinder body, the support ring 12 is used for propping against the mounting seat 8, and an oil port of the rodless cavity of the power cylinder is communicated with an annular area of the support ring 12.

In this embodiment, the support ring 12 supports the mounting seat 8, and when the extension section protrudes from the mounting seat 8, the support ring 12 supports the mounting seat 8, so that the extension section can be prevented from colliding with the cylinder bottom 2.

In addition, through setting up support ring 12 to the hydraulic fluid port in rodless cavity and the annular region intercommunication of support ring 12 reduce the problem of mount pad 8 shutoff rodless cavity's hydraulic fluid port, make the fluid can more smoothly flow field ground enter into the rodless cavity from the hydraulic fluid port in rodless cavity.

In some embodiments provided by the present utility model, the power cylinder further includes a cover 13.

The cover 13 is provided outside the sensor 7. The cover 13 is connected with the cylinder.

In this embodiment, the cover 13 is covered on the outer side of the sensor 7, so that the cover 13 can protect the sensor 7, reduce the problem of collision or extrusion of external objects to the sensor 7, and prolong the service life of the sensor 7.

Optionally, the cover 13 is connected to the cylinder by threaded fasteners.

The embodiment of the utility model also provides a working machine.

The work machine includes a power cylinder as described above.

It should be noted that, the working machine includes the power cylinder and includes all the advantages of the power cylinder, which are not described herein.

Work machines include, but are not limited to, excavators, loaders, concrete pump trucks, and on-board pumps.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.

In the description of the present specification, reference to the terms "one embodiment," "first aspect embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A power cylinder, comprising:

The piston (4) is arranged in the cylinder body and is in sliding fit with the cylinder body, the piston rod (5) is connected with the piston (4), and the piston rod (5) extends out of the cylinder body;

a magnet (6), the magnet (6) being connected to the piston rod (5) or the piston (4);

the sensor (7) is used for detecting the position of the magnet (6), the sensor (7) is arranged on the outer side of the cylinder body to be separated from the piston rod (5), and the sensor (7) is arranged along the axial extension of the piston rod (5).

2. The power cylinder according to claim 1, further comprising a mounting seat (8), said mounting seat (8) being provided at a side of said piston (4) close to a cylinder bottom (2) of said power cylinder, and said mounting seat (8) being connected with said piston rod (5) or said piston (4), said magnet (6) being mounted to said mounting seat (8).

3. A power cylinder according to claim 2, characterized in that the end of the piston rod (5) arranged in the cylinder body is provided with an extension section, and the mounting seat (8) is sleeved on the extension section and connected with the extension section.

4. A power cylinder according to claim 3, further comprising a fixing nut (10), wherein the extension section comprises a positioning section (501) and a connecting section (502), the positioning section (501) is arranged at one end of the extension section close to the piston (4), the diameter of the positioning section (501) is larger than that of the connecting section (502), a step hole is arranged in the mounting seat (8), the thick end of the step hole is in positioning fit with the positioning section (501), a gap is formed between the thin end of the step hole and the connecting section (502), the fixing nut (10) is in threaded connection with one end of the connecting section (502) away from the piston (4), and the fixing nut (10) is propped against the mounting seat (8).

5. A power cylinder according to claim 3, further comprising a first set screw (9), the first set screw (9) being in threaded connection with the mount (8) and the first set screw (9) being in abutment with the extension.

6. A power cylinder according to claim 2, characterized in that the mounting seat (8) is provided with a mounting groove, in which the magnet (6) is arranged.

7. A power cylinder according to claim 6, further comprising a second set screw (11), the second set screw (11) being in threaded connection with the mounting block (8), and the second set screw (11) being passed through a side wall of the mounting slot against the magnet (6).

8. A power cylinder according to any one of claims 2-7, further comprising a support ring (12), said support ring (12) being arranged in an annular configuration, said support ring (12) being arranged in said cylinder, said support ring (12) being adapted to be in abutment with said mounting seat (8), an oil port of a rodless cavity of said power cylinder being in communication with an annular region of said support ring (12).

9. A power cylinder according to any one of claims 1-7, further comprising a cover (13), said cover (13) being arranged to cover the outside of said sensor (7), said cover (13) being connected to said cylinder.

10. A work machine comprising a power cylinder as claimed in any one of claims 1 to 9.