CN219176695U

CN219176695U - Multi-stage hydraulic cylinder with self-locking and manual emergency descending functions

Info

Publication number: CN219176695U
Application number: CN202320310934.XU
Authority: CN
Inventors: 石宏彪; 白果; 何福林; 刘亮; 张向英; 罗梓铭
Original assignee: Chengdu Lihang Technology Co Ltd
Current assignee: Chengdu Lihang Technology Co Ltd
Priority date: 2023-02-24
Filing date: 2023-02-24
Publication date: 2023-06-13
Anticipated expiration: 2033-02-24

Abstract

The utility model discloses a multi-stage hydraulic cylinder with self-locking and manual emergency descending functions, which mainly comprises: the device comprises a handle, a cylinder body, a piston, a cylinder bottom, a first-stage oil cylinder and a second-stage oil cylinder, wherein the first-stage oil cylinder is provided with a piston rod a, the second-stage piston is provided with a piston rod b, the piston rod a is positioned in the cylinder body, the piston rod b is positioned in the piston rod a, a rod head is arranged on the upper portion of the piston rod b, the handle is arranged on the side face of the rod head, a cam device is arranged at the tail portion of the piston rod b, the piston rod a is connected with the piston rod b through threads, a locking nut is arranged on the upper portion of the piston rod a, and a guide rod is arranged on the outer side of the locking nut. The utility model solves the technical problems of insufficient reliability and safety of the hydraulic cylinder and difficult control of sinking displacement in the prior art.

Description

Multi-stage hydraulic cylinder with self-locking and manual emergency descending functions

Technical Field

The utility model relates to the field of multistage hydraulic cylinders, in particular to a multistage hydraulic cylinder with self-locking and manual emergency descending functions.

Background

The hydraulic cylinder is a hydraulic executive component which converts hydraulic energy into mechanical energy and performs linear reciprocating motion or swinging motion, the structure is simple, the work is reliable, a speed reducing device can be omitted when the hydraulic cylinder is used for realizing reciprocating motion, and the hydraulic cylinder has no transmission clearance and stable motion, so the hydraulic cylinder is widely applied to various mechanical hydraulic systems, but the existing cylinder mostly does not have self-locking capability, and the conventional cylinder can not meet the requirements in places with high requirements on equipment reliability and safety and sinking displacement amount of the cylinder.

Disclosure of Invention

The utility model aims to provide a multi-stage hydraulic cylinder with self-locking and manual emergency descending functions, so as to solve the technical problems that the reliability and the safety of the hydraulic cylinder are not high enough and the sinking displacement is difficult to control in the prior art.

In order to achieve the above purpose, the present utility model provides a multi-stage hydraulic cylinder with self-locking and manual emergency descending functions, comprising: the device comprises a handle, a cylinder body, a piston, a cylinder bottom, a first-stage oil cylinder and a second-stage oil cylinder, wherein the first-stage oil cylinder is provided with a piston rod a, the second-stage piston is provided with a piston rod b, the piston rod a is positioned in the cylinder body, the piston rod b is positioned in the piston rod a, a rod head is arranged on the upper portion of the piston rod b, the handle is arranged on the side face of the rod head, a cam device is arranged at the tail portion of the piston rod b, the piston rod a is connected with the piston rod b through threads, a locking nut is arranged on the upper portion of the piston rod a, and a guide rod is arranged on the outer side of the locking nut.

Specifically, trapezoidal threads are machined on the inner side and the outer side of the piston rod a, and the trapezoidal threads on the inner side are located on the upper half section of the piston rod a.

Specifically, the outer side of the piston rod b is provided with trapezoidal threads, and the trapezoidal threads are connected with the trapezoidal threads on the inner side of the piston rod a.

Specifically, the top end of the club head is provided with an internal thread.

Specifically, the lock nut is connected with the piston rod a through threads.

Specifically, the guide rod head is located at the outermost side, and a guide sleeve is arranged on the guide rod.

Based on the technical scheme, the embodiment of the utility model at least has the following technical effects:

(1) According to the multistage hydraulic oil cylinder with the self-locking and manual emergency descending functions, the inner side and the outer side of the piston rod a of the first-stage oil cylinder are both provided with the trapezoid threads with the self-locking capability, when the piston rod of the first-stage oil cylinder extends out of any position, the locking nut at the upper part of the oil cylinder is screwed, the piston rod a of the oil cylinder is locked, and the mechanical lock is reliable and is parked for a long time without sinking.

(2) According to the multistage hydraulic cylinder with the self-locking and manual emergency descending functions, the trapezoidal threads with the self-locking capability are machined on the outer side of the second-stage piston rod b of the cylinder, and when the piston rod 2 of the second-stage cylinder extends out of any position, the trapezoidal threads on the outer side of the piston rod b interact with the trapezoidal threads on the inner side of the piston rod a to lock the piston rod b of the cylinder.

(3) According to the multistage hydraulic cylinder with the self-locking and manual emergency descending functions, when the hydraulic system is in fault and the piston rod a cannot descend, the locking nut is loosened to prop the guide rod against the outer side of the cylinder barrel, and meanwhile the locking nut is rotated to enable the piston rod a to descend, so that the manual emergency function can be achieved.

Drawings

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

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a schematic diagram of an embodiment of the present utility model;

FIG. 3 is a schematic view of a piston rod a according to an embodiment of the present utility model;

FIG. 4 is a schematic view of the structure of a piston rod b according to an embodiment of the present utility model;

FIG. 5 is a schematic view showing the structure of the connection of the piston rod a and the piston rod b according to the embodiment of the present utility model;

fig. 6 is a schematic view of a club head according to an embodiment of the present utility model.

In the figure: 1-club head, 2-handle, 3-piston rod a, 4-piston rod b, 5-lock nut, 6-guide sleeve, 7-guide rod, 8-nut, 9-cylinder, 10-cam device, 11-seal a, 12-seal b, 13-piston, 14-cylinder bottom.

Detailed Description

For better understanding of the purpose, structure and function of the present utility model, the multi-stage hydraulic cylinder with self-locking and manual emergency lowering functions of the present utility model will be described in further detail with reference to the accompanying drawings and examples. The specific embodiments described herein are to be considered in all respects as illustrative and not restrictive, and the described embodiments are intended to be illustrative only of some, but not all embodiments of the utility model.

In the description of the present utility model, 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 present utility model 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 present utility model. 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.

As shown, the multi-stage hydraulic cylinder with self-locking and manual emergency descent functions comprises: handle 2, cylinder body 9, piston 13, cylinder bottom 14, first order hydro-cylinder and second grade hydro-cylinder, first order hydro-cylinder has piston rod a3, the second grade piston has piston rod b4, piston rod a3 is located cylinder body 9 inside, piston rod b4 is located inside piston rod a3, piston rod b4 upper portion is equipped with pole head 1, handle 2 is equipped with to pole head 1 side, piston rod b4 afterbody is provided with cam device 10, piston rod a3 and piston rod b4 pass through threaded connection, piston rod a3 upper portion is provided with lock nut 5, the lock nut outside has guide bar 7, both processing has trapezoidal screw thread in the inboard and the outside of piston rod a3, inboard trapezoidal screw thread is located piston rod a3 upper half, processing has trapezoidal screw thread in the outside of piston rod b4, link to each other with piston rod a3 inboard trapezoidal screw thread, the pole head 1 top is provided with the internal thread, pass through threaded connection between lock nut 5 and the piston rod a3, guide bar 7 head is located the outside, be provided with uide bushing 6 on the guide bar 7.

The oil cylinder is formed by two stages, trapezoidal threads with self-locking capability are processed on the inner side and the outer side of a piston rod a3 of the first-stage oil cylinder, when the piston rod a3 of the first-stage oil cylinder extends out to any position, a locking nut 5 at the upper part of the oil cylinder is screwed, the first-stage piston rod a3 of the oil cylinder is locked, and the mechanical lock is reliable and is parked for a long time without sinking; the outer side of a second-stage piston rod b4 of the oil cylinder is provided with a trapezoid thread with self-locking capability, the upper part of the piston rod b4 is provided with a rod head 1, the top end of the rod head 1 is provided with an internal thread, various oil cylinder joints can be connected, the side surface of the rod head 1 is provided with a handle 2, and the second-stage piston rod b4 of the oil cylinder is screwed out by rotating the handle 8. When the piston rod b4 of the second-stage oil cylinder extends out to any position, the trapezoidal threads on the outer side of the piston rod b4 interact with the trapezoidal threads on the inner side of the piston rod a3 to lock the second-stage piston rod b4 of the oil cylinder; the tail of the piston rod b4 is provided with a cam device 10, so that the piston rod b4 can be prevented from being manually unscrewed. The cam gear 10 may be rotated to remove the piston rod b4 when servicing.

When the hydraulic system fault is detected and the piston rod a3 cannot descend, the lock nut 5 is manually rotated to the lowest position, the guide rod 7 outside the lock nut 5 is adjusted, the guide rod 7 is adjusted to the outer side of the jack post cylinder body 9, the lock nut 5 is manually rotated, the piston rod a3 outside the lock nut 5 descends, and the emergency descending operation of the oil cylinder can be manually completed.

It will be understood that the utility model has been described with respect to certain embodiments and that various changes and equivalents may be made to those features and embodiments without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims

1. The utility model provides a take multistage hydraulic cylinder of auto-lock and manual emergent decline function, includes handle (2), cylinder body (9), piston (13), cylinder bottom (14), first order hydro-cylinder and second grade hydro-cylinder, and first order hydro-cylinder has piston rod a (3), and the second grade piston has piston rod b (4), and piston rod a (3) are located inside cylinder body (9), and piston rod b (4) are located inside piston rod a (3), a serial communication port, club head (1) are equipped with on piston rod b (4) upper portion, handle (2) are equipped with to club head (1) side, piston rod b (4) afterbody is provided with cam device (10), piston rod a (3) and piston rod b (4) pass through threaded connection, piston rod a (3) upper portion is provided with lock nut (5), the lock nut outside has guide bar (7).

2. The multistage hydraulic cylinder with the self-locking and manual emergency descending functions according to claim 1, wherein trapezoidal threads are machined on the inner side and the outer side of the piston rod a (3), and the inner trapezoidal threads are located on the upper half section of the piston rod a (3).

3. The multistage hydraulic cylinder with the self-locking and manual emergency descending functions according to claim 2, wherein trapezoidal threads are machined on the outer side of the piston rod b (4) and connected with trapezoidal threads on the inner side of the piston rod a (3).

4. The multistage hydraulic cylinder with self-locking and manual emergency descent function according to claim 1, characterized in that the head (1) top is provided with internal threads.

5. The multistage hydraulic cylinder with self-locking and manual emergency descent function according to claim 1, characterized in that the locking nut (5) is connected with the piston rod a (3) through threads.

6. The multistage hydraulic cylinder with the self-locking and manual emergency descending functions according to claim 1, wherein the head of the guide rod (7) is located at the outermost side, and a guide sleeve (6) is arranged on the guide rod (7).