CN214888089U - Buffer structure for hydraulic cylinder of forklift - Google Patents

Abstract

The utility model discloses a be used for fork truck buffer structure for pneumatic cylinder, including the jar shell, the working chamber has been seted up to the inside of jar shell, and sealed slidable mounting has piston mechanism in the working chamber, the inner diapire of working chamber is equipped with buffer gear, and buffer gear includes buffer spring and conflict buffer board, buffer spring's one end fixed connection is in the inner diapire of working chamber. This a buffer structure for fork truck pneumatic cylinder, the buffer spring atress is compressed this moment, under its spring action, make partial power subduct, in order to avoid piston mechanism to pound the diapire to the working chamber, when the buffer plate atress of contradicting moves down simultaneously, it is protruding that the buffer plate extrusion arc of contradicting, the protruding atress of arc drives power lead screw and slides in the side position inslot, it is compressed to reset to turn round the spring this moment, under its spring action of resetting turning round the spring, in order to offset the power of contradicting the buffer plate, thereby make piston mechanism's buffering effect better, in order to improve the life of pneumatic cylinder.

Description

Buffer structure for hydraulic cylinder of forklift

Technical Field

The utility model relates to a fork truck pneumatic cylinder technical field specifically is a be used for buffer structure for fork truck pneumatic cylinder.

Background

The hydraulic oil cylinder buffer structure is an important functional device of a hydraulic oil cylinder, when the hydraulic oil cylinder is used for driving an object with certain mass or easy to break to fall, the object has larger kinetic energy when the hydraulic oil cylinder moves to the stroke end point, if the speed reduction treatment is not carried out, a piston of the hydraulic oil cylinder mechanically collides with a cylinder bottom, impact and noise are generated, and the hydraulic oil cylinder buffer structure is destructive. To avoid this, a buffer structure is required in the hydraulic cylinder.

In the prior art, the cylinder bottom integrated buffer structure is generally adopted, a buffer sleeve made of red copper materials is embedded in a piston and fixed by a clamping ring, an inner hole of the buffer sleeve made of red copper materials is used as a buffer hole, and a high-precision buffer plunger is integrated with the cylinder bottom.

Therefore, a buffer structure for a hydraulic cylinder of a forklift needs to be designed so as to solve the problems set forth in the foregoing description.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a be used for fork truck buffer structure for pneumatic cylinder to solve the problem that above-mentioned background art provided.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a buffer structure for fork truck pneumatic cylinder, includes the jar shell, the working chamber has been seted up to the inside of jar shell, and the sealed slidable mounting in working chamber has piston mechanism, the inner diapire in working chamber is equipped with buffer gear, and buffer gear includes buffer spring and conflict buffer plate, buffer spring's one end fixed connection is in the inner diapire in working chamber, and buffer spring's the other end and conflict buffer plate fixed linking to each other, conflict buffer plate activity in working chamber and lie in piston mechanism's below, the both sides of jar shell are connected with respectively and enter the pipe and the oily exit tube of the oil that communicates with working chamber, and the oil is gone into the pipe and the oily exit tube all lies in between piston mechanism and the conflict buffer plate, lateral slot has all been seted up to the both sides wall in working chamber, and the lateral slot is equipped with slowly weak mechanism.

Preferably, slow weak mechanism includes that power lead screw, arc are protruding and the spring is turned round in the restoration, power lead screw slidable mounting is in the side position inslot, and the one end fixedly connected with arc that power lead screw is close to the working chamber is protruding, the protruding one side of keeping away from power lead screw of arc is convex and extends to the working chamber in, the tank bottom fixedly connected with in side position groove is turned round the spring in the restoration, and the spring is turned round in the restoration twines on power lead screw and rather than fixed continuous.

Preferably, the outer side surface of the cylinder shell is fixedly connected with an external seat, a swing sealing plate is rotatably installed in the external seat through a sliding mechanism, one end, far away from the arc protrusion, of the power screw rod extends into the external seat and is in threaded connection with the swing sealing plate, and the outer side of the swing sealing plate extends to the outside of the external seat.

Preferably, an arc-shaped rail groove is formed in the external seat, the sliding mechanism comprises a sliding block, the sliding block is slidably mounted in the arc-shaped rail groove, and the swing sealing plate is fixedly connected to the sliding block.

Preferably, the arc protrusion is located below the collision buffer plate, and when the arc protrusion shrinks into the side groove, the swing sealing plate rotates one hundred eighty degrees.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) this a buffer structure for fork truck pneumatic cylinder, when piston mechanism moves down in the working chamber, under its power effect, piston mechanism extrusion conflict breaker, the buffer spring atress is compressed this moment, under its spring action, make partial power subduct, in order to avoid piston mechanism pound the diapire to the working chamber, when conflict breaker atress moves down simultaneously, it is protruding that conflict breaker extrusion arc, the protruding atress of arc drives the power lead screw and slides in the side position inslot, the spring is turned round in the reseing this moment, under its spring action that resets and turns round the spring, in order to offset the power of conflict breaker, thereby make piston mechanism's buffering effect better, in order to improve the life of pneumatic cylinder.

(2) This a buffer structure for fork truck pneumatic cylinder, move the in-process at the power lead screw, because power lead screw and pendulum shrouding threaded connection, so the power lead screw drives the pendulum shrouding on it and rotates, the slider slides in the arc rail groove this moment, so that the pendulum shrouding can stably swing one hundred eighty degrees (the pendulum shrouding is vertical downwards under its natural state originally), two pendulum shroudings seal oil income pipe and oil exit tube this moment, with the input and the output of control oil, make power can be by make full use of, when the buffering finishes, under its effect of turning round the spring that resets, the power lead screw resets, make pendulum shrouding reversal to normal position, in order to relieve the closing cap of oil income pipe and oil exit tube, reduce the loss of pneumatic cylinder.

Drawings

FIG. 1 is a sectional view of the present invention;

FIG. 2 is an enlarged view of part A of the structure of FIG. 1;

FIG. 3 is a schematic structural view of another embodiment of the present invention;

fig. 4 is a side sectional view of the connection structure of the external seat and the swing sealing plate of the present invention.

In the figure: 1. a cylinder shell; 101. oil inlet pipe; 102. an oil outlet pipe; 2. a working chamber; 3. a buffer spring; 4. is abutted against the buffer plate; 5. a piston mechanism; 6. a lateral groove; 7. a power screw rod; 8. arc convex; 9. a return torsion spring; 10. an external seat; 11. a swing closing plate; 12. a sliding mechanism; 13. an arc-shaped rail groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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.

Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a be used for fork truck buffer structure for pneumatic cylinder, including cylinder shell 1, working chamber 2 has been seted up to the inside of cylinder shell 1, and sealed slidable mounting has piston mechanism 5 in working chamber 2, the inner diapire of working chamber 2 is equipped with buffer gear, and buffer gear includes buffer spring 3 and conflict buffer plate 4, buffer spring 3's one end fixed connection is in working chamber 2's inner diapire, and buffer spring 3's the other end and conflict buffer plate 4 are fixed to be linked to each other, conflict buffer plate 4 activity is in working chamber 2 and be located piston mechanism 5's below, the both sides of cylinder shell 1 are connected with respectively and are gone into pipe 101 and oil exit tube 102 with working chamber 2 intercommunication, and oil income pipe 101 and oil exit tube 102 all are located between piston mechanism 5 and the conflict buffer plate 4, lateral groove 6 has all been seted up to working chamber 2's both sides wall, and be equipped with the weak mechanism that delays in lateral groove 6.

The slow-weak mechanism comprises a power screw rod 7, an arc protrusion 8 and a reset torsion spring 9, the power screw rod 7 is slidably mounted in a side groove 6, the power screw rod 7 is close to one end of the working cavity 2 and fixedly connected with the arc protrusion 8, one side, far away from the power screw rod 7, of the arc protrusion 8 is arc-shaped and extends into the working cavity 2, the bottom of the side groove 6 is fixedly connected with the reset torsion spring 9, and the reset torsion spring 9 is wound on the power screw rod 7 and is fixedly connected with the power screw rod.

The outer side surface of the cylinder shell 1 is fixedly connected with an external seat 10, a swing sealing plate 11 is rotatably installed in the external seat 10 through a sliding mechanism 12, one end, far away from the arc protrusion 8, of the power screw rod 7 extends into the external seat 10 and is in threaded connection with the swing sealing plate 11, and the outer side of the swing sealing plate 11 extends to the outside of the external seat 10.

An arc-shaped rail groove 13 is formed in the external seat 10, the sliding mechanism 12 comprises a sliding block, the sliding block is slidably mounted in the arc-shaped rail groove 13, and the swing sealing plate 11 is fixedly connected to the sliding block.

The arc protrusion 8 is located below the collision buffer plate 4, and when the arc protrusion 8 shrinks into the side position groove 6, the pendulum sealing plate 11 rotates one hundred eighty degrees.

The working principle is as follows: when the piston mechanism 5 moves downwards in the working cavity 2, the piston mechanism 5 extrudes the conflict buffer plate 4 under the action of power, the buffer spring 3 is compressed under the stress, part of power is reduced under the action of elasticity, so that the situation that the piston mechanism 5 smashes the bottom wall of the working cavity is avoided, meanwhile, when the conflict buffer plate 4 moves downwards under the stress, the conflict buffer plate 4 extrudes the arc protrusion 8, the arc protrusion 8 is stressed to drive the power screw rod 7 to slide in the side groove 6, the reset torsion spring 9 is compressed at the moment, and the power of the conflict buffer plate 4 is counteracted under the action of the elasticity of the reset torsion spring 9, so that the buffer effect of the piston mechanism 5 is better, and the service life of the hydraulic cylinder is prolonged;

in the moving process of the power screw rod 7, the power screw rod 7 is in threaded connection with the swing seal plate 11, so that the power screw rod 7 drives the swing seal plate 11 on the power screw rod 7 to rotate, the sliding block slides in the arc-shaped rail groove 13 at the moment, the swing seal plate 11 can stably swing one hundred eighty degrees (the swing seal plate 11 is vertically downward in a natural state), at the moment, the two swing seal plates 11 seal the oil inlet pipe 101 and the oil outlet pipe 102, the input and the output of oil are controlled, the power can be fully utilized, when the buffering is finished, under the action of the reset torsion spring 9, the power screw rod 7 resets, the swing seal plate 11 is reversely rotated to the original position, the sealing covers of the oil inlet pipe 101 and the oil outlet pipe 102 are removed, and the loss of the hydraulic cylinder is reduced.

Those not described in detail in this specification are within the skill of the art.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (5)

1. The utility model provides a be used for fork truck buffer structure for pneumatic cylinder, includes jar shell (1), its characterized in that: the inner part of the cylinder shell (1) is provided with a working cavity (2), a piston mechanism (5) is arranged in the working cavity (2) in a sealing and sliding mode, a buffer mechanism is arranged on the inner bottom wall of the working cavity (2) and comprises a buffer spring (3) and a conflict buffer plate (4), one end of the buffer spring (3) is fixedly connected to the inner bottom wall of the working cavity (2), the other end of the buffer spring (3) is fixedly connected with the conflict buffer plate (4), the conflict buffer plate (4) is movable in the working cavity (2) and is positioned below the piston mechanism (5), two sides of the cylinder shell (1) are respectively connected with an oil inlet pipe (101) and an oil outlet pipe (102) which are communicated with the working cavity (2), the oil inlet pipe (101) and the oil outlet pipe (102) are both positioned between the piston mechanism (5) and the conflict buffer plate (4), two side grooves (6) are respectively formed in two side walls of the working cavity (2), and a weak buffering mechanism is arranged in the side groove (6).

2. The cushioning structure for a forklift hydraulic cylinder according to claim 1, characterized in that: slowly weak mechanism includes power lead screw (7), arc protruding (8) and reset torsion spring (9), power lead screw (7) slidable mounting is in side position groove (6), and power lead screw (7) are close to the protruding (8) of one end fixedly connected with arc of working chamber (2), one side that power lead screw (7) were kept away from in arc protruding (8) is arc and extends to working chamber (2), the tank bottom fixedly connected with of side position groove (6) resets torsion spring (9), and resets torsion spring (9) twine on power lead screw (7) and rather than fixed continuous.

3. The cushioning structure for a forklift hydraulic cylinder according to claim 2, characterized in that: the lateral surface fixedly connected with of jar shell (1) puts seat (10) outward, and rotates through slide mechanism (12) in putting seat (10) outward and install pendulum shrouding (11), power lead screw (7) keep away from the one end of arc protruding (8) extend to put seat (10) outward and with pendulum shrouding (11) threaded connection, the outside of pendulum shrouding (11) extends to the outside of putting seat (10) outward.

4. The cushioning structure for a forklift hydraulic cylinder according to claim 3, characterized in that: an arc-shaped rail groove (13) is formed in the external seat (10), the sliding mechanism (12) comprises a sliding block, the sliding block is slidably mounted in the arc-shaped rail groove (13), and the swing sealing plate (11) is fixedly connected to the sliding block.

5. The cushioning structure for a forklift hydraulic cylinder according to claim 3, characterized in that: the arc protrusion (8) is located below the conflict buffer plate (4), and when the arc protrusion (8) shrinks into the lateral groove (6), the swing sealing plate (11) rotates one hundred eighty degrees.

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