CN209959620U

CN209959620U - Self-locking mechanism of hydraulic cylinder

Info

Publication number: CN209959620U
Application number: CN201920528640.8U
Authority: CN
Inventors: 纪文明
Original assignee: Beijing Zhonghui Hechuang Technology Co Ltd
Current assignee: Beijing Zhonghui Hechuang Technology Co Ltd
Priority date: 2019-04-17
Filing date: 2019-04-17
Publication date: 2020-01-17
Anticipated expiration: 2029-04-17

Abstract

The utility model relates to a pneumatic cylinder self-locking mechanism, include: the locking device comprises a locking bracket, a locking mechanism and a locking mechanism, wherein the locking bracket comprises a mounting plate and a first limiting plate; the mounting plate is arranged on the hydraulic cylinder and is positioned on the same side with the piston rod; the first limiting plate is erected on the first mounting plate, a long-strip-shaped first limiting hole is formed in the upper portion of the first limiting plate, and the first limiting hole is parallel to the piston rod; the lock hook comprises a locking plate and a blocking piece, the locking plate and the blocking piece are connected in an L shape, and the connecting position of the locking plate and the blocking piece is hinged with the mounting plate; one end of the pin shaft is vertically connected to the piston rod, and the other end of the pin shaft penetrates through the first limiting hole and is blocked by the blocking piece; the pin shaft is suitable for reciprocating motion in the first limiting hole along with the extension of the piston rod so as to stir the blocking piece to drive the locking plate to be locked. The utility model can automatically take effect when the hydraulic locking of the hydraulic cylinder is invalid, and avoid the failure of the locking and positioning functions of the hydraulic cylinder; and simultaneously, the utility model discloses well pneumatic cylinder self-locking mechanism's simple structure is effective, and maneuverability is strong.

Description

Self-locking mechanism of hydraulic cylinder

Technical Field

The utility model belongs to the technical field of the pneumatic cylinder locking, concretely relates to pneumatic cylinder self-locking mechanism.

Background

The hydraulic cylinder is an actuating element which drives and bears a large load, and is generally required to be capable of stably bearing an external load for a long time without any displacement when the movement is stopped, namely, the hydraulic cylinder is required to have a locking and positioning function and have no 'soft-back' phenomenon. At present, a hydraulic locking circuit is generally adopted to realize the locking and positioning functions of a hydraulic cylinder, namely, the hydraulic locking circuit is formed by an o-type or m-type three-position reversing valve, a one-way valve, a hydraulic control one-way valve, a two-way hydraulic lock and the like to realize the one-way or two-way locking and positioning functions. However, the hydraulic locking circuit cannot solve the problems of piston slippage and stability caused by internal leakage inevitably existing in the hydraulic cylinder, so that the hydraulic locking circuit can only be used in occasions with low locking and positioning requirements. For some occasions with higher locking and positioning requirements, especially occasions requiring long-term reliable locking under the action of load, hydraulic locking cannot meet the requirements.

Therefore, not enough more than, the utility model discloses the urgent need provides a pneumatic cylinder self-locking mechanism to solve the unstable problem of hydraulic pressure locking.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pneumatic cylinder self-locking mechanism to solve the unstable problem of hydraulic pressure locking of pneumatic cylinder among the prior art.

The utility model provides a hydraulic cylinder self-locking mechanism, a drop lock bracket, wherein the drop lock bracket comprises a mounting plate and a first limiting plate; the mounting plate is mounted on a cylinder cover of the hydraulic cylinder and is positioned on the same side with a piston rod of the hydraulic cylinder; the first limiting plate is vertically arranged on the mounting plate, a long-strip-shaped first limiting hole is formed in the first limiting plate, and the first limiting hole is parallel to the piston rod; one end of the pin shaft is vertically connected to the piston rod, and the other end of the pin shaft penetrates through the first limiting hole; the pin shaft is suitable for reciprocating movement in the first limiting hole along with the extension and retraction of the piston rod; the lock hook comprises a locking plate and a blocking piece, the locking plate and the blocking piece are connected in an L shape, and the connecting position of the locking plate and the blocking piece is hinged with the mounting plate; the blocking piece is suitable for being stirred by the end part of the pin shaft when the pin shaft reciprocates, and then the locking plate is driven to move.

The hydraulic cylinder self-locking mechanism further preferably further comprises a fixing plate, wherein the fixing plate is mounted on the first limiting plate and located on the upper side of the first limiting hole, and the fixing plate is suitable for limiting the blocking sheet.

The hydraulic cylinder self-locking mechanism further preferably further comprises a second limiting plate, wherein the second limiting plate is vertically arranged on the mounting plate and is parallel to the first limiting plate; and a second limiting hole is formed in the second limiting plate, and the second limiting hole is superposed with the orthographic projection of the first limiting hole.

In the hydraulic cylinder self-locking mechanism, it is further preferable that the lock hook is hinged to the mounting plate through a mounting bracket; the mounting frame comprises two support plates and a connecting rod, the support plates are vertically arranged on the mounting plate, and the two support plates are parallel to each other; the support plate is provided with a first mounting hole suitable for the insertion of the connecting rod; and a second mounting hole is formed in the lock hook, and the second mounting hole is correspondingly mounted with the connecting rod.

In the hydraulic cylinder self-locking mechanism described above, it is further preferable that the stopper is provided with a flange, and the flange is provided on a side of the stopper facing the mounting plate.

In the hydraulic cylinder self-locking mechanism, it is further preferable that a free end of the locking piece is provided with a weight.

In the hydraulic cylinder self-locking mechanism, it is further preferable that the blocking piece, the locking piece, the flange and the weight block are integrally formed.

The hydraulic cylinder self-locking mechanism is further preferably characterized in that the mounting plate, the first limiting plate, the second limiting plate, the fixing plate and the two support plates are of an integrally formed structure.

The hydraulic cylinder self-locking mechanism is further preferably characterized in that the first limiting hole and the second limiting hole are oblong holes, and the width of each oblong hole is matched with the diameter of the pin shaft.

The hydraulic cylinder self-locking mechanism is further preferably made of wear-resistant cast iron, gray cast iron, steel or aluminum alloy materials.

Compared with the prior art, the utility model has the following advantage:

the utility model discloses a setting up the pneumatic cylinder self-locking mechanism including lock bracket, latch hook and round pin axle that falls, wherein, the round pin axle along with the flexible reciprocating motion in the first spacing hole of piston rod, when the piston rod outwards expands and reaches the maximum displacement and lean on the supporter, the round pin axle also moves forward, releases the spacing to the separation blade, makes the whole latch hook rotate naturally, releases the support to the supporter; when the two piston rods stretch backwards, the pin shaft also moves backwards, the blocking piece is stirred backwards in the moving process, and then the locking plate is finally made to be perpendicular to the mounting plate to replace the piston rod to continue to provide support, so that locking is completed. Through the arrangement, the hydraulic cylinder self-locking structure can be automatically replaced and taken effect when the hydraulic locking of the hydraulic cylinder is invalid, so that the locking and positioning functions of the hydraulic cylinder are prevented from being invalid; and simultaneously, the utility model discloses well pneumatic cylinder self-locking mechanism's simple structure is effective, and maneuverability is strong.

Drawings

Fig. 1 is a schematic structural view of a self-locking mechanism of a hydraulic cylinder according to the present invention;

FIG. 2 is a view taken along line A of FIG. 1;

fig. 3 is a view from direction B of fig. 1.

Description of reference numerals:

1-mounting plate, 2-first limiting plate, 3-second limiting plate, 4-baffle plate, 5-locking plate, 6-pin shaft, 7-first limiting hole, 8-fixing plate, 9-flange, 10-balancing weight, 11-support plate and 12-connecting rod.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, 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 should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", 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 referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting 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.

As shown in fig. 1 to 3, the hydraulic cylinder self-locking mechanism disclosed in this embodiment includes: the locking device comprises a locking bracket, a locking mechanism and a locking mechanism, wherein the locking bracket comprises a mounting plate 1 and a first limiting plate 2; the mounting plate 1 is mounted on a cylinder cover of the hydraulic cylinder and is positioned on the same side with a piston rod of the hydraulic cylinder; the first limiting plate 2 is vertically arranged on the mounting plate 1, a long-strip-shaped first limiting hole 7 is formed in the first limiting plate 2, and the first limiting hole 7 is parallel to the piston rod; one end of the pin shaft 6 is vertically connected to the piston rod, and the other end of the pin shaft 6 penetrates through the first limiting hole 7; the pin shaft 6 is suitable for reciprocating movement in the first limiting hole 7 along with the extension and retraction of the piston rod; the lock hook comprises a locking plate 5 and a blocking piece 4, the locking plate 5 and the blocking piece 4 are connected in an L shape, and the connecting position of the locking plate 5 and the blocking piece 4 is hinged with the mounting plate 1; the blocking piece 4 is suitable for being stirred by the end part of the pin shaft 6 when the pin shaft 6 reciprocates, and then the locking plate 5 is driven to move. In the structure, the lock hook is L-shaped, the blocking piece is blocked by the pin shaft, and the connecting position of the locking plate 5 and the blocking piece 4 is hinged with the mounting plate 1, so when the pin shaft 6 moves back and forth in the first limiting hole 7 along with the extension of the piston rod, the lock hook has two states, wherein one state is a natural state, at the moment, when the piston rod is unfolded outwards and reaches the maximum displacement to abut against a support, the limit of the pin shaft 6 on the blocking piece 4 is minimum, and the locking plate naturally droops; another kind is the locking state, and at this moment, the piston rod is shrink backward and is makeed the round pin axle is right the spacing of separation blade is the biggest, makes the separation blade with the mounting panel is parallel, the locking plate with the mounting panel is perpendicular, and then replaces the piston rod to lean on the support, realizes the locking. The transformation of the two states is caused by the failure of hydraulic locking of the piston rod, at the moment, the piston rod contracts backwards due to the pressure of the support to drive the pin shaft 6 to move backwards, the limit of the blocking piece 4 is increased in the backward movement process of the pin shaft 6 until the maximum limit is reached, in the process, the lock hook rotates relative to the mounting plate, the natural state is transformed into the locking state, the piston rod is replaced to abut against the support, and locking is achieved. The hydraulic cylinder self-locking mechanism in the embodiment is a mechanical self-locking mechanism, the hydraulic cylinder is replaced for locking and supporting only when the hydraulic self-locking of the hydraulic cylinder is failed, the locking and supporting are started automatically by withdrawing a piston rod of the hydraulic cylinder, instantaneous replacement is achieved, and the influence on a support is small.

As shown in fig. 1 to 3, further, in the hydraulic cylinder self-locking mechanism disclosed in this embodiment, a fixing plate 8 is further included, and the fixing plate 8 is installed on the first limiting plate 2, is located on the upper side of the first limiting hole 7, and is suitable for limiting the blocking piece 4. The fixing plate 8 is arranged to limit the rotation angle of the blocking piece 4, so as to avoid the problem that the length of the blocking piece 4 is lengthened due to too large reciprocating displacement of the pin shaft 6, that is, in this embodiment, the fixing plate 8 and the mounting plate 1 limit the maximum rotation angle of the pin shaft 6, and the pin shaft 6 is adapted to adjust the instant angle of the pin shaft 6.

As shown in fig. 1 to 3, further, the hydraulic cylinder self-locking mechanism disclosed in this embodiment further includes a second limiting plate 3, where the second limiting plate 3 is vertically installed on the mounting plate 1, and is parallel to the first limiting plate 2; and a second limiting hole is formed in the second limiting plate 3, and the second limiting hole is superposed with the orthographic projection of the first limiting hole 7. The arrangement of the second limiting plate 3 is suitable for further limiting the movement of the pin shaft 6, so that the movement of the pin shaft 6 is more stable.

As shown in fig. 1 to 3, further, in the hydraulic cylinder self-locking mechanism disclosed in this embodiment, the locking hook is hinged to the mounting plate 1 through a mounting frame; the mounting frame comprises two support plates 11 and a connecting rod 12, wherein the support plates 11 are vertically arranged on the mounting plate 1, and the two support plates are parallel to each other; the support plate 11 is provided with a first mounting hole suitable for the insertion of the connecting rod 12; and a second mounting hole is formed in the lock hook and is correspondingly mounted with the connecting rod 12.

Preferably, the blocking plate 4 is provided with a flange 9, the flange is arranged on one side of the blocking plate 4 facing the mounting plate 1, and the flange 9 is suitable for stopping the mounting plate 1. In the above structure, the mounting bracket is adapted to provide a hinge structure for the latch hook, and the flange 9 is adapted to provide a supporting force for the latch hook after the latch hook is erected, so that the latch hook 5 can be perpendicular to the supporting plate when the latch hook is supported by the overall structure, and a maximum acting force is provided. On the other hand, the flange 9 is also suitable for limiting the rotating angle of the other side of the lock hook, so that the problem that the lock hook tilts the locking plate 5 due to the fact that the separation blade 4 abuts against the mounting plate 1 after the mounting frame supports the lock hook is avoided.

Preferably, the free end of the locking plate 5 is provided with a counterweight 10. The arrangement of the counterweight block 10 is suitable for increasing the weight of the free end of the locking plate 5, and the problem of upward tilting of the locking plate 5 is avoided.

As shown in fig. 1 to 3, further, in the hydraulic cylinder self-locking mechanism disclosed in this embodiment, the first limiting hole 7 and the second limiting hole are oblong holes, and the width of the oblong hole is adapted to the diameter of the pin shaft 6.

As shown in fig. 1 to 3, further, in the hydraulic cylinder self-locking mechanism disclosed in this embodiment, the blocking plate 4, the locking plate 5, the flange 9 and the counterweight 10 are integrally formed; mounting panel 1, first limiting plate 2, second limiting plate 3, fixed plate 8 and two the extension board 11 is the integrated into one piece structure.

As shown in fig. 1-3, further, the self-locking structure of the hydraulic cylinder is made of wear-resistant cast iron, gray cast iron, steel or aluminum alloy. Wear-resistant cast iron, gray cast iron (HT300, HT350), steel or aluminum alloy material.

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. A hydraulic cylinder self-locking mechanism is characterized by comprising:

the locking device comprises a locking bracket, a locking mechanism and a locking mechanism, wherein the locking bracket comprises a mounting plate and a first limiting plate; the mounting plate is mounted on a cylinder cover of the hydraulic cylinder and is positioned on the same side with a piston rod of the hydraulic cylinder; the first limiting plate is vertically arranged on the mounting plate, a long-strip-shaped first limiting hole is formed in the first limiting plate, and the first limiting hole is parallel to the piston rod;

one end of the pin shaft is vertically connected to the piston rod, and the other end of the pin shaft penetrates through the first limiting hole; the pin shaft is suitable for reciprocating movement in the first limiting hole along with the extension and retraction of the piston rod;

the lock hook comprises a locking plate and a blocking piece, the locking plate and the blocking piece are connected in an L shape, and the connecting position of the locking plate and the blocking piece is hinged with the mounting plate; the blocking piece is suitable for being stirred by the end part of the pin shaft when the pin shaft reciprocates, and then the locking plate is driven to move.

2. The hydraulic cylinder self-locking mechanism according to claim 1, further comprising a fixing plate, wherein the fixing plate is mounted on the first limiting plate, is located on the upper side of the first limiting hole, and is suitable for limiting the blocking sheet.

3. The hydraulic cylinder self-locking mechanism according to claim 2, further comprising a second limiting plate vertically mounted on the mounting plate and parallel to the first limiting plate; and a second limiting hole is formed in the second limiting plate, and the second limiting hole is superposed with the orthographic projection of the first limiting hole.

4. The hydraulic cylinder self-locking mechanism according to claim 3, wherein the locking hook is hinged to the mounting plate by a mounting bracket; the mounting frame comprises two support plates and a connecting rod, the support plates are vertically arranged on the mounting plate, and the two support plates are parallel to each other; the support plate is provided with a first mounting hole suitable for the insertion of the connecting rod;

and a second mounting hole is formed in the lock hook, and the second mounting hole is correspondingly mounted with the connecting rod.

5. The hydraulic cylinder self-locking mechanism according to claim 4, wherein the blocking piece is provided with a flange, and the flange is arranged on one side of the blocking piece facing the mounting plate.

6. The hydraulic cylinder self-locking mechanism according to claim 5, wherein the free end of the locking plate is provided with a counterweight.

7. The hydraulic cylinder self-locking mechanism according to claim 6, wherein the catch, the locking plate, the flange and the weight block are integrally formed.

8. The hydraulic cylinder self-locking mechanism according to claim 7, wherein the mounting plate, the first limiting plate, the second limiting plate, the fixing plate and the two support plates are of an integrally formed structure.

9. The hydraulic cylinder self-locking mechanism according to claim 8, wherein the first limiting hole and the second limiting hole are oblong holes, and the width of each oblong hole is matched with the diameter of the pin shaft.

10. The hydraulic cylinder self-locking mechanism according to claim 9, wherein the hydraulic cylinder self-locking structure is made of wear-resistant cast iron, gray cast iron, steel or aluminum alloy material.