CN216377050U - Hydraulic buffer for elevator - Google Patents

Abstract

The utility model provides a hydraulic buffer of an elevator, which comprises a plunger cylinder, a plunger cover, a pressure cylinder, a variable shaft and a return spring, wherein the plunger cover is arranged on the plunger cylinder; the plunger cylinder comprises a cylinder body, a connecting piece, a guide ring and a piston; the side wall of the lower end of the cylinder body is provided with a through hole, the upper end and the lower end of the cylinder body are respectively sleeved with a connecting piece and a piston, and the guide ring is sleeved in the middle of the cylinder body; the plunger piston cover is arranged on the connecting piece; the pressure cylinder sleeve is connected to the outer sides of the guide ring and the piston, and the bottom surface of the guide ring, the top surface of the piston, the outer wall of the cylinder body and the inner wall of the pressure cylinder are matched to form an accommodating cavity; the variable shaft passes through the piston and enters the lower end of the cylinder; the reset spring is sleeved outside the plunger cylinder. The elevator hydraulic buffer enables the bottom surface of the guide ring, the top surface of the piston, the outer wall of the cylinder and the inner wall of the pressure cylinder to form the containing cavity by arranging the guide ring and the piston in the cylinder, and in the buffering process, buffer liquid enters the containing cavity to prevent the buffer liquid from being carried away by discharged gas, so that the problem that the total amount of the buffer liquid is reduced to influence the buffering effect is avoided.

Description

Hydraulic buffer for elevator

Technical Field

The utility model relates to the technical field of elevator safety components, in particular to an elevator hydraulic buffer.

Background

In the prior art, a plurality of hydraulic buffers are used at the bottom of the elevator shaft. When the elevator car or the counterweight slides down to compress the hydraulic buffer, hydraulic oil enters the plunger cylinder from the pressure cylinder through a gap formed between the adjusting rod and the throttling nozzle of the plunger cylinder. In the compression process, the clearance between the adjusting rod and the throttling nozzle can be gradually changed to generate variable damping, so that the elevator car or the counterweight can be buffered and stopped.

In the buffering process of the conventional hydraulic buffer of the elevator, as the plunger cylinder moves downwards, part of hydraulic oil is extruded into the plunger cylinder, and air in the plunger cylinder is exhausted through the exhaust hole due to extrusion. In the exhaust process of the exhaust hole, a small part of hydraulic oil is exhausted along with the gas, and after long-time use, the total amount of the hydraulic oil in the hydraulic buffer of the elevator is reduced, so that the buffering effect is influenced, and even potential safety hazards are caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an elevator hydraulic buffer to solve the problem that a small part of hydraulic oil is discharged along with gas in the exhaust process of a plunger cylinder of the existing elevator hydraulic buffer.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a hydraulic buffer of an elevator, which comprises a plunger barrel, a plunger cover, a pressure cylinder, a variable shaft and a return spring, wherein the plunger barrel, the plunger cover, the pressure cylinder, the variable shaft and the return spring are coaxially arranged;

the plunger barrel comprises a barrel body, a connecting piece, a guide ring and a piston; the side wall of the lower end of the cylinder body is provided with a through hole, and the through hole is communicated with the inside of the cylinder body; the connecting piece is sleeved at the upper end of the cylinder body, the piston is sleeved at the lower end of the cylinder body, and the guide ring is sleeved at the middle part of the cylinder body;

the plunger piston cover is arranged on the top surface of the connecting piece;

the pressure cylinder sleeve is connected to the outer sides of the guide ring and the piston, and the bottom surface of the guide ring, the top surface of the piston, the outer wall of the cylinder body and the inner wall of the pressure cylinder are matched to form an accommodating cavity;

the upper end of the variable shaft penetrates through the piston and enters the opening at the lower end of the cylinder body, and the lower end of the variable shaft is fixedly connected with the bottom of the pressure cylinder;

the reset spring is sleeved on the outer side of the plunger barrel, the upper end of the reset spring tightly abuts against the plunger cover, and the lower end of the reset spring tightly abuts against the top of the pressure cylinder.

In the hydraulic buffer of the elevator, the piston comprises a connecting convex ring, a piston body and a throttle plate;

the connecting convex ring is arranged on the top surface of the piston body, and the lower end of the cylinder body is sleeved in the connecting convex ring;

the middle part of the bottom surface of the piston body is provided with a mounting hole; a concave cavity is concavely arranged on the periphery of the mounting hole, and the throttle plate is mounted in the concave cavity;

the upper end of the variable shaft sequentially penetrates through the throttle plate and the mounting hole and extends into the cylinder body.

In the elevator hydraulic buffer, the lower end of the cylinder body and the inner side wall of the connecting convex ring are provided with threads, and the lower end of the cylinder body is in threaded connection with the connecting convex ring;

the side wall of the connecting convex ring is provided with a lower fixing hole and a lower bolt, the side wall of the lower end of the barrel is provided with a lower screw hole corresponding to the lower fixing hole, and the lower bolt penetrates through the lower fixing hole and is connected with the lower screw hole.

In the elevator hydraulic buffer, an avoidance cavity matched with the upper end of a cylinder body is arranged at the bottom of the connecting piece, and the upper end of the cylinder body is sleeved in the avoidance cavity;

the connecting piece lateral wall is equipped with fixed orifices and last bolt, barrel upper end lateral wall is equipped with the last screw that corresponds with last fixed orifices, go up the bolt pass go up the fixed orifices and with go up the screw and be connected.

The elevator hydraulic buffer also comprises an air inlet valve, wherein the air inlet valve is arranged at an opening at the upper end of the cylinder body, and the upper end of the air inlet valve penetrates through the plunger cover.

The hydraulic buffer of the elevator also comprises a buffer cushion, and the buffer cushion is provided with an air inlet hole matched with the position of the air inlet valve; the buffer pad is arranged on the top surface of the plunger cover.

In the hydraulic buffer of the elevator, the pressure cylinder comprises a base and a pressure cylinder body;

the pressure cylinder body is arranged on the base, a blocking convex ring is arranged on the inner wall of the upper end of the pressure cylinder body, and the inner diameter of the blocking convex ring is smaller than the outer diameter of the guide ring;

the outer side wall of the pressure cylinder body is sleeved with a baffle, and the lower end of the return spring is tightly abutted against the baffle;

the variable shaft is arranged in the pressure cylinder body, and the lower end of the variable shaft is fixedly connected to the base.

One technical scheme in the utility model can have the following beneficial effects:

the elevator hydraulic buffer is characterized in that the guide ring and the piston are arranged on the cylinder, the through hole is formed in the cylinder, the bottom surface of the guide ring, the top surface of the piston, the outer wall of the cylinder and the inner wall of the pressure cylinder are matched to form an accommodating cavity, buffer liquid enters the accommodating cavity in the buffering process, the buffer liquid is prevented from being carried away by discharged gas, the problem that the buffer effect is influenced due to the fact that the total amount of the buffer liquid is reduced after the elevator hydraulic buffer is used for a long time is solved, and the safety accident caused by the fact that the buffer liquid is reduced is also avoided.

Drawings

FIG. 1 is a schematic cross-sectional view of one embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is an enlarged view of a portion of FIG. 1 at B;

in the drawings: the plunger piston comprises a plunger piston barrel 1, a plunger piston cover 2, a pressure cylinder 3, a variable shaft 4, a return spring 5, an air inlet valve 6 and a cushion pad 7;

the device comprises a cylinder body 11, a connecting piece 12, a guide ring 13, a piston 14 and an accommodating cavity 15; a base 31, a pressure cylinder 32;

a through hole 111, a lower screw hole 112, an upper screw hole 113; a connecting convex ring 141, a piston body 142, and a throttle plate 143; a blocking convex ring 321 and a baffle 322;

an upper fixing hole 1211, an upper bolt 1212; lower fixing holes 1411, lower bolts 1412.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 3, the utility model provides a hydraulic buffer for an elevator, which comprises a plunger barrel 1, a plunger cover 2, a pressure cylinder 3, a variable shaft 4 and a return spring 5 which are coaxially arranged;

the plunger cylinder 1 comprises a cylinder body 11, a connecting piece 12, a guide ring 13 and a piston 14; a through hole 111 is formed in the side wall of the lower end of the cylinder 11, and the through hole 111 is communicated with the inside of the cylinder 11; the connecting piece 12 is sleeved at the upper end of the cylinder body 11, the piston 14 is sleeved at the lower end of the cylinder body 11, and the guide ring 13 is sleeved at the middle part of the cylinder body 11;

the plunger cover 2 is arranged on the top surface of the connecting piece 12;

the pressure cylinder 3 is sleeved on the outer sides of the guide ring 13 and the piston 14, and the bottom surface of the guide ring 13, the top surface of the piston 14, the outer wall of the cylinder body 11 and the inner wall of the pressure cylinder 3 are matched to form an accommodating cavity 15;

the upper end of the variable shaft 4 penetrates through the piston 14 and enters the opening at the lower end of the cylinder body 11, and the lower end of the variable shaft 4 is fixedly connected with the bottom of the pressure cylinder 3;

the reset spring 5 is sleeved on the outer side of the plunger barrel 1, the upper end of the reset spring 5 tightly abuts against the plunger cover 2, and the lower end of the reset spring 5 tightly abuts against the top of the pressure cylinder 3.

The buffering process of the hydraulic buffer of the elevator can refer to the existing hydraulic buffer of the elevator, when the car descends to the bottom of the elevator shaft, the bottom of the car is contacted with the top end of the hydraulic buffer of the elevator arranged at each position, the weight of the car is averagely pressed on each hydraulic buffer of the elevator, so that the plunger cylinder 1 moves downwards, and the plunger cylinder 1 is inserted into the pressure cylinder 3; meanwhile, the plunger cover 2 moves downwards along with the plunger barrel 1 and compresses the return spring 5; the plunger cylinder 1 extrudes the buffer liquid in the pressure cylinder 3, so that the buffer liquid enters the plunger cylinder 1 through an assembly gap between the bottom of the plunger cylinder 1 and the variable shaft 4, and the hydraulic buffer of the elevator resists the gravity of the lift car through the counterforce generated by extruding the buffer liquid and the reset spring 5, thereby achieving the purpose of buffering.

A through hole 111 is formed at the near end of the lower end of the cylinder 11, a guide ring 13 and a piston 14 are sleeved on the outer side of the cylinder 11, and the through hole 111 is located between the guide ring 13 and the piston 14. The bottom surface of the guide ring 13, the top surface of the piston 14, the outer wall of the cylinder 11 and the inner wall of the pressure cylinder 3 cooperate to form a receiving chamber 15. When the plunger barrel 1 moves downward, the buffer liquid entering the barrel body 11 flows into the accommodation chamber 15 through the through hole 111. And, along with plunger barrel 1 moves down, the upper end of variable volume axle 4 inserts gradually in barrel 11, extrudes buffer liquid, plays the effect of quickening buffer liquid and getting into holding chamber 15.

When the lift car moves upwards, the reset spring 5 resets and jacks up the plunger barrel 1 through the plunger cover 2, the buffer liquid in the accommodating cavity 15 returns to the barrel body 11 through the through hole 111 and then returns to the pressure cylinder 3 again through the assembly gap between the barrel body 11 and the variable displacement shaft 4, and the reset of the hydraulic buffer of the elevator is realized.

The elevator hydraulic buffer is characterized in that the guide ring 13 and the piston 14 are arranged on the cylinder body 11, and the through hole is formed in the cylinder body 11, so that the bottom surface of the guide ring 13, the top surface of the piston 14, the outer wall of the cylinder body 11 and the inner wall of the pressure cylinder 3 are matched to form the accommodating cavity 15, in the buffering process, buffer liquid enters the accommodating cavity 15, the buffer liquid is prevented from being taken away by discharged gas, the problem that the buffer effect is influenced due to the reduction of the total amount of the buffer liquid after the elevator hydraulic buffer is used for a long time is solved, and safety accidents caused by the reduction of the buffer liquid are also avoided.

Specifically, the piston 14 includes a connecting convex ring 141, a piston body 142, and a throttle plate 143;

the connecting convex ring 141 is arranged on the top surface of the piston body 142, and the lower end of the cylinder 11 is sleeved in the connecting convex ring 141;

the middle part of the bottom surface of the piston body 142 is provided with a mounting hole; a concave cavity is concavely arranged on the periphery of the mounting hole, and the throttle plate 143 is mounted in the concave cavity;

the upper end of the variable shaft 4 sequentially passes through the throttle plate 143 and the mounting hole and extends into the cylinder 11.

The throttle plate 143 is mounted on the piston and the cylinder 11 is inserted on the coupling boss 141. The mounting hole communicates with the inner space of the coupling boss 141 so that the upper end of the variable displacement shaft 4 can pass through the throttle plate 143 and the mounting hole to enter the cylinder 11. The connection convex ring 141 plays a role of being fixedly connected with the cylinder 11. The throttle plate 143 functions to block the buffer liquid from flowing into the cylinder 11 quickly, thereby preventing the buffer effect from being deteriorated due to the buffer liquid flowing into the cylinder 11 too quickly.

In the specific embodiment, the throttle plate 143 is in clearance fit with the mounting hole, and the throttle plate has a degree of freedom with a 0.3mm clearance, so that the phenomenon of jamming of the piston 14 when the machining precision of the pressure cylinder 3 and the variable shaft 4 is poor can be avoided, and the mounting qualified rate is improved.

Specifically, the lower end of the cylinder 11 and the inner side wall of the connecting convex ring 141 are provided with threads, and the lower end of the cylinder 11 is in threaded connection with the connecting convex ring 141;

the side wall of the connecting convex ring 141 is provided with a lower fixing hole 1411 and a lower bolt 1412, the side wall of the lower end of the cylinder 11 is provided with a lower screw hole 112 corresponding to the lower fixing hole 1411, and the lower bolt passes through the lower fixing hole 1411 and is connected with the lower screw hole 112.

By adopting the structure, the cylinder 11 and the piston 14 can be more tightly connected, so that the cylinder 11 and the piston 14 are fully stressed in the buffering process, and the stability of the cylinder 11 and the piston 14 can be enhanced.

Specifically, an avoidance cavity matched with the upper end of the cylinder 11 is arranged at the bottom of the connecting piece 12, and the upper end of the cylinder 11 is sleeved in the avoidance cavity;

the side wall of the connecting member 12 is provided with an upper fixing hole 1211 and an upper bolt 1212, the side wall of the upper end of the cylinder 11 is provided with an upper screw hole 113 corresponding to the upper fixing hole 1211, and the upper bolt passes through the upper fixing hole 1211 and is connected with the upper screw hole 113.

With the above structure, the stability of the cylinder 11 and the connector 12 can be enhanced. And the problem of buffer liquid leakage of the hydraulic buffer of the elevator in the transportation process can be avoided.

Further, the hydraulic buffer of the elevator further comprises an air inlet valve 6, wherein the air inlet valve 6 is arranged at an opening at the upper end of the cylinder 11, and the upper end of the air inlet valve 6 penetrates through the plunger cover 2.

Adopt above-mentioned structure, elevator hydraulic buffer exhausts and breathes in through the admission valve, avoids buffer liquid buffer to take place the side and fall and lead to buffer liquid to flow in the transportation, and simultaneously, the admission valve can avoid buffer liquid to follow gas outgoing at the buffering process to prevent that buffer liquid total amount from reducing, influence buffering effect.

Furthermore, the hydraulic buffer of the elevator also comprises a buffer cushion 7, and the buffer cushion 7 is provided with an air inlet hole matched with the position of the air inlet valve 6; the buffer pad 7 is disposed on the top surface of the plunger cover 2.

The buffer pad 7 contacts with the car bottom, plays the buffering and reduces the frictional effect of plunger lid 2, and buffer pad 7 is equipped with the inlet port, prevents that buffer pad 7 from blocking 11 upper end openings of barrel, avoids the unable carminative problem of elevator hydraulic buffer in the buffering process.

Specifically, the pressure cylinder 3 includes a base 31 and a pressure cylinder body 32;

the pressure cylinder 32 is arranged on the base 31, a blocking convex ring 321 is arranged on the inner wall of the upper end of the pressure cylinder 32, and the inner diameter of the blocking convex ring 321 is smaller than the outer diameter of the guide ring 13;

a baffle 322 is sleeved on the outer side wall of the pressure cylinder body 32, and the lower end of the return spring 5 is tightly abutted to the baffle 322;

the variable shaft 4 is disposed in the pressure cylinder 32, and the lower end of the variable shaft 4 is fixedly connected to the base 31.

The base 31 is arranged at the bottom of the elevator shaft and plays a role in fixing a hydraulic buffer of the elevator and connecting the variable shaft 4. The pressure cylinder 32 is used for loading buffer liquid, and the variable shaft 4 plays a role of guiding to prevent the plunger barrel 1 from moving in other directions except the axial direction.

The blocking convex ring 321 plays a role in limiting the guide ring 13 to continuously move upwards, and under a normal state, the top surface of the guide ring 13 tightly supports against the blocking convex ring 321, so that the guide ring 13 is prevented from continuously moving upwards to cause the plunger cylinder 1 to be separated from the pressure cylinder 3, and further the elevator hydraulic buffer cannot normally operate.

The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the utility model and should not be construed in any way as limiting the scope of the utility model. Other embodiments of the utility model will occur to those skilled in the art without the exercise of inventive faculty based on the explanations herein, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined in the appended claims.

Claims (7)

1. The hydraulic buffer of the elevator is characterized in that: the plunger piston comprises a plunger piston barrel, a plunger piston cover, a pressure cylinder, a variable shaft and a return spring which are coaxially arranged;

the plunger barrel comprises a barrel body, a connecting piece, a guide ring and a piston; the side wall of the lower end of the cylinder body is provided with a through hole, and the through hole is communicated with the inside of the cylinder body; the connecting piece is sleeved at the upper end of the cylinder body, the piston is sleeved at the lower end of the cylinder body, and the guide ring is sleeved at the middle part of the cylinder body;

the plunger piston cover is arranged on the top surface of the connecting piece;

the pressure cylinder sleeve is connected to the outer sides of the guide ring and the piston, and the bottom surface of the guide ring, the top surface of the piston, the outer wall of the cylinder body and the inner wall of the pressure cylinder are matched to form an accommodating cavity;

the upper end of the variable shaft penetrates through the piston and enters the opening at the lower end of the cylinder body, and the lower end of the variable shaft is fixedly connected with the bottom of the pressure cylinder;

the reset spring is sleeved on the outer side of the plunger barrel, the upper end of the reset spring tightly abuts against the plunger cover, and the lower end of the reset spring tightly abuts against the top of the pressure cylinder.

2. The hydraulic buffer of an elevator according to claim 1, characterized in that: the piston comprises a connecting convex ring, a piston body and a throttle plate;

the connecting convex ring is arranged on the top surface of the piston body, and the lower end of the cylinder body is sleeved in the connecting convex ring;

the middle part of the bottom surface of the piston body is provided with a mounting hole; a concave cavity is concavely arranged on the periphery of the mounting hole, and the throttle plate is mounted in the concave cavity;

the upper end of the variable shaft sequentially penetrates through the throttle plate and the mounting hole and extends into the cylinder body.

3. The hydraulic buffer of an elevator according to claim 2, characterized in that: threads are arranged on the lower end of the cylinder body and the inner side wall of the connecting convex ring, and the lower end of the cylinder body is in threaded connection with the connecting convex ring;

the side wall of the connecting convex ring is provided with a lower fixing hole and a lower bolt, the side wall of the lower end of the barrel is provided with a lower screw hole corresponding to the lower fixing hole, and the lower bolt penetrates through the lower fixing hole and is connected with the lower screw hole.

4. The hydraulic buffer of an elevator according to claim 1, characterized in that: an avoidance cavity matched with the upper end of the cylinder is arranged at the bottom of the connecting piece, and the upper end of the cylinder is sleeved in the avoidance cavity;

the connecting piece lateral wall is equipped with fixed orifices and last bolt, barrel upper end lateral wall is equipped with the last screw that corresponds with last fixed orifices, go up the bolt pass go up the fixed orifices and with go up the screw and be connected.

5. The hydraulic buffer of an elevator according to claim 1, characterized in that: still include the admission valve, the admission valve set up in the opening part of barrel upper end, just the upper end of admission valve passes the plunger lid.

6. The hydraulic buffer of an elevator according to claim 5, characterized in that: the air inlet valve is characterized by also comprising a buffer cushion, wherein the buffer cushion is provided with an air inlet hole matched with the air inlet valve in position; the buffer pad is arranged on the top surface of the plunger cover.

7. The hydraulic buffer of an elevator according to claim 6, characterized in that: the pressure cylinder comprises a base and a pressure cylinder body;

the pressure cylinder body is arranged on the base, a blocking convex ring is arranged on the inner wall of the upper end of the pressure cylinder body, and the inner diameter of the blocking convex ring is smaller than the outer diameter of the guide ring;

the outer side wall of the pressure cylinder body is sleeved with a baffle, and the lower end of the return spring is tightly abutted against the baffle;

the variable shaft is arranged in the pressure cylinder body, and the lower end of the variable shaft is fixedly connected to the base.

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