阅读说明：本技术 一种用于油压机滑块的液压锁止装置及液压锁止系统 (Hydraulic locking device and hydraulic locking system for oil press sliding block ) 是由 叶臻 于 2019-11-28 设计创作，主要内容包括：本发明公开一种用于油压机滑块的液压锁止装置及液压锁止系统,用于滑块顶部活动导杆的夹紧,液压锁止装置包括空心缸体、法兰压盘、底盖、负载补偿单元和夹紧单元,空心缸体上方安装有法兰压盘,底部安装有底盖,空心缸体内部安装有压紧活动导杆的夹紧单元,底盖底部设置有负载补偿单元,法兰压盘、底盖、负载补偿单元上均开设有供活动导杆穿过的通孔,液压锁止系统包括液压系统和液压锁止装置,本发明解决了现有技术中锁止装置锁紧效果差,无法及时应对突发意外事故的安全性技术问题。(The invention discloses a hydraulic locking device and a hydraulic locking system for a sliding block of an oil press, which are used for clamping a movable guide rod at the top of the sliding block, wherein the hydraulic locking device comprises a hollow cylinder body, a flange pressure plate, a bottom cover, a load compensation unit and a clamping unit, the flange pressure plate is arranged above the hollow cylinder body, the bottom cover is arranged at the bottom, the clamping unit for pressing the movable guide rod is arranged in the hollow cylinder body, the load compensation unit is arranged at the bottom of the bottom cover, through holes for the movable guide rod to pass through are formed in the flange pressure plate, the bottom cover and the load compensation unit, and the hydraulic locking system comprises a hydraulic system and a hydraulic locking device.)

1. The utility model provides a hydraulic locking means for hydraulic press slider for the clamp of slider top activity guide arm is tight, its characterized in that, including hollow cylinder body, flange pressure disk, bottom, load compensation unit and clamping unit, install hollow cylinder body top the flange pressure disk, install the bottom, hollow cylinder body internally mounted has the clamping unit who compresses tightly movable guide arm, the bottom is provided with load compensation unit, all set up the through-hole that supplies movable guide arm to pass on flange pressure disk, bottom, the load compensation unit.

2. The hydraulic locking device for the oil press sliding block according to claim 1, wherein the load compensation unit comprises a bottom plate, a connecting flange and a plurality of compensation springs, the connecting flange is mounted on the outer side of the bottom plate, the compensation springs are connected between the bottom plate and the bottom cover, and the compensation springs are arranged at intervals.

3. The hydraulic locking device for the oil press slider as claimed in claim 2, wherein the load compensation unit further comprises a positioning support and a fixing housing, the positioning support is mounted below the bottom cover, the fixing housing is mounted on an outer side of the positioning support, an outer edge of the bottom plate is fixed to an inner wall of a bottom of the fixing housing, the connecting flange is sleeved on an outer side of the fixing housing, and the compensation spring is disposed between the positioning support and the bottom plate.

4. The hydraulic locking device for the hydraulic press slider as claimed in claim 1, wherein the clamping unit comprises a plurality of clamping discs and a plurality of braking springs, the clamping discs are arranged along a circumferential direction, inner walls of the clamping discs are combined to form a cylindrical channel for the movable guide rod to pass through, and the braking springs are arranged between the upper part of the clamping discs and the bottom surface of the flange gland.

5. The hydraulic lock-out mechanism of claim 1, wherein the clamping unit further comprises a fixed wedge disposed between an inner wall of the hollow cylinder and an outer wall of the clamping disk, and a guide plate disposed between the fixed wedge and the clamping disk.

6. The hydraulic locking device for the oil press sliding block according to claim 5, wherein the clamping unit further comprises a piston rod, the bottom cover comprises a stepped portion and a horizontal portion, the stepped portion is located above the horizontal portion, the stepped portion is located inside the hollow cylinder, a reservoir cavity is formed between an inner wall of the hollow cylinder and an outer wall of the stepped portion, the piston rod is hermetically arranged inside the reservoir cavity, a top portion of the piston rod is in contact with a bottom portion of the clamping disc, and the bottom cover is provided with a high-pressure oil passage which is communicated with the bottom portion of the reservoir cavity.

7. The hydraulic locking device for a hydraulic press ram of claim 6, wherein a position sensitive switch is inserted outside the hollow cylinder.

8. The utility model provides a hydraulic locking system for hydraulic press slider, its characterized in that includes that claim 1-7 is arbitrary hydraulic locking device, pressure relay, solenoid directional valve, pressure valve, check valve, hydraulic pump and batch oil tank, the import of hydraulic pump with the batch oil tank intercommunication, the export with the check valve intercommunication, the solenoid directional valve respectively with high-pressure fluid passageway, batch oil tank and check valve intercommunication, it has pressure relay still to communicate on the solenoid directional valve, the solenoid directional valve with the batch oil tank intercommunication forms the oil return branch road, the solenoid directional valve with check valve, hydraulic pump intercommunication form the oil feed branch road, the pressure valve respectively with oil feed branch road and oil return branch road intercommunication.

Technical Field

The invention relates to the technical field of mechanical braking, in particular to a hydraulic locking device and a hydraulic locking system for a slide block of an oil press.

Background

At present, the safety measures of domestic oil presses have great defects, which cause frequent safety accidents and even the phenomena of machine damage and people death. The safety protection is not achieved in the aspect of safety protection mainly due to the technical and cost reasons of equipment manufacturers, and even some simple safety mechanisms are not equipped, so that the safety standards of forging and pressing machine tools are seriously not met. Generally, there are two safety measures for the ram block of a forging machine. The first mode is as follows: when the slide block stops at the uppermost position, the slide block is locked by the bolt type safety bolt for preventing the slide block from sliding downwards so as to be convenient for safe overhaul and die change. For example, the patent of publication number "CN 101386217A" is a safety bolt, and the patent of publication number "CN 203713125U" is an upper limit locking device for a slide block of a hydraulic machine, which has the disadvantages that the slide block can be locked only when the slide block stops operating and must stay at the uppermost position, and if the slide block suddenly fails due to the pressure loss of a hydraulic system, the power failure of an electric line and other faults in the operating process, the slide block can still continue to operate downwards under the state of losing control, which not only damages a device mold, but also brings great harm to the personal safety of an operator.

The second way is: the end surfaces of two sides of the hydraulic press sliding block are respectively provided with a rack, the inner side of the machine body upright post is provided with a mechanism comprising a clamping jaw, an oil cylinder and a plurality of connecting pieces, and the oil cylinder drives the clamping jaw and the rack to be locked and released, so that the sliding block is safely locked. Publication number "CN 203023776U") and a hydraulic press, which have the following disadvantages: 1) the locking of the slide can only be carried out when the device is out of operation and the slide has to stay in a certain position, because there is a certain distance between each tooth of the rack, so that the locking in any position of the full stroke is not possible, and the risk of the first mode still exists. 2) There are limitations. Due to the installation mode, the structure is only suitable for the frame type oil press, but cannot be installed for the four-column type oil press.

Disclosure of Invention

The invention aims to provide a hydraulic locking device and a hydraulic locking system for a sliding block of an oil press, and solves the safety technical problems that a locking device in the prior art is poor in locking effect and cannot timely cope with sudden accidents.

A hydraulic locking device for a sliding block of an oil press is used for clamping a movable guide rod at the top of the sliding block and comprises a hollow cylinder body, a flange pressure plate, a bottom cover, a load compensation unit and a clamping unit, wherein the flange pressure plate is arranged above the hollow cylinder body, the bottom cover is arranged at the bottom of the hollow cylinder body, the clamping unit for compressing the movable guide rod is arranged in the hollow cylinder body, the load compensation unit is arranged at the bottom of the bottom cover, and through holes for the movable guide rod to pass through are formed in the flange pressure plate, the bottom cover and the load compensation unit;

the invention has the advantages that the clamping unit is improved, and the sliding block can be effectively locked or immediately braked no matter the press equipment is in a stop state or in an operating state when any fault occurs, so that the effects of protecting the equipment mould from being damaged and protecting the personal safety of operators from being injured are achieved.

On the basis of the technical scheme, the invention can be further improved as follows:

further, the load compensation unit comprises a bottom plate, a connecting flange and a plurality of compensation springs, the connecting flange is installed on the outer side of the bottom plate, the bottom plate and the compensation springs are connected between the bottom covers, the compensation springs are arranged at intervals, and the load compensation unit has the beneficial effect that a certain displacement compensation effect can be achieved through the load compensation unit.

Furthermore, the load compensation unit further comprises a positioning support and a fixed shell, the positioning support is installed below the bottom cover, the fixed shell is installed on the outer side of the positioning support, the outer edge of the bottom plate is fixed with the inner wall of the bottom of the fixed shell, the connecting flange is sleeved on the outer side of the fixed shell, and the compensation spring is arranged between the positioning support and the bottom plate.

Further, the clamping unit comprises a plurality of clamping discs and a plurality of brake springs, the clamping discs are arranged along the circumferential direction, the inner walls of the clamping discs are combined to form a cylindrical channel for the movable guide rod to pass through, the brake springs are arranged between the upper side of the clamping discs and the bottom surface of the flange gland, and the clamping unit has the beneficial effects that when the clamping unit is used for clamping, the inner walls of the clamping discs and the outer walls of the movable guide rod are tightly attached to finish the clamping action.

Furthermore, the clamping unit also comprises a fixed wedge block and a guide plate, the fixed wedge block is arranged between the inner wall of the hollow cylinder body and the outer wall of the clamping disc, and the guide plate is arranged between the fixed wedge block and the clamping disc.

Further, the clamping unit still includes the piston rod, the bottom includes ladder portion and horizontal part, the ladder portion is located the horizontal part top, and the ladder portion is located inside the hollow cylinder body, form the stock solution chamber between the inner wall of hollow cylinder body and the outer wall of ladder portion, stock solution chamber internal seal is provided with the piston rod, the top of piston rod with the bottom contact of pressing from both sides tight dish, high-pressure fluid passageway has been seted up to the bottom, high-pressure fluid passageway with stock solution chamber bottom intercommunication, the beneficial effect of adopting this step is that piston rod and stock solution chamber form the structure similar to the pneumatic cylinder, provide hydraulic for the relaxed state.

Furthermore, the position sensing switch is inserted in the outer side of the hollow cylinder body, and the beneficial effect of the step is that the motion track of the clamping disc can be detected through the position sensing switch.

The invention also discloses a hydraulic locking system for the sliding block of the oil press, which comprises the hydraulic locking device, a pressure relay, an electromagnetic directional valve, a pressure valve, a one-way valve, a hydraulic pump and an oil storage tank, wherein the inlet of the hydraulic pump is communicated with the oil storage tank, the outlet of the hydraulic pump is communicated with the one-way valve, the electromagnetic directional valve is respectively communicated with the high-pressure oil passage, the oil storage tank and the one-way valve, the pressure relay is also communicated with the electromagnetic directional valve, the electromagnetic directional valve is communicated with the oil storage tank to form an oil return branch, the electromagnetic directional valve is communicated with the one-way valve and the hydraulic pump to form an oil inlet branch, and the pressure valve is respectively communicated with the oil inlet branch and the oil return.

The hydraulic locking device has the beneficial effects that the hydraulic locking device is controlled through the hydraulic system, when locking is realized, the liquid storage cavity loses pressure, and the braking spring pushes the clamping disc to be locked; when the clamping disc is loosened, the hydraulic system supplies oil, the piston rod pushes the clamping disc to loosen, and therefore the sliding block is locked at any position in real time and is in a static state, and the effect of protecting equipment and personal safety is achieved.

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 description of the embodiments or 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 other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a cross-sectional view of a hydraulic locking device for a ram according to embodiment 1 of the present invention;

fig. 2 is a schematic view of a direction a-a of a hydraulic locking device for a ram according to embodiment 1 of the present invention;

fig. 3 is a cross-sectional view of a hydraulic locking device for a hydraulic press ram according to embodiment 1 of the present invention in a released state;

fig. 4 is a cross-sectional view of a hydraulic locking device for a hydraulic press ram according to embodiment 1 of the present invention in a clamped state;

fig. 5 is a schematic diagram of a hydraulic locking system for a hydraulic press ram according to embodiment 2 of the present invention;

reference numerals:

1-hollow cylinder body; 2-flange pressure plate; 3-bottom cover; 4-a load compensation unit; 5-a clamping unit; 6-a slide block; 7-a movable guide rod; 8-a through hole; 9-position sensing switch; 10-hydraulic locking device; 11-a pressure relay; 12-a solenoid directional valve; 13-a pressure valve; 14-a one-way valve; 15-a hydraulic pump; 16-an oil storage tank; 17-oil return branch; 18-an oil inlet branch;

301-step portion; 302-a horizontal portion; 303-liquid storage cavity; 304-a high pressure oil passage;

401-a backplane; 402-a connecting flange; 403-a compensation spring; 404-positioning a support; 405-a stationary housing;

501-clamping the disc; 502-a brake spring; 503-fixing the wedge block; 504-a guide plate; 505-piston rod.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.

In the description of the present application, it is to be understood that the terms "upper", "lower", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred devices or elements 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.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.