CN212982159U

CN212982159U - Elevator buffer

Info

Publication number: CN212982159U
Application number: CN202021948801.8U
Authority: CN
Inventors: 胡佳裕
Original assignee: Cixi Jiayu Elevator Parts Co ltd
Current assignee: Cixi Jiayu Elevator Parts Co ltd
Priority date: 2020-09-08
Filing date: 2020-09-08
Publication date: 2021-04-16
Anticipated expiration: 2030-09-08

Abstract

The utility model discloses an elevator buffer, including pneumatic cylinder and piston rod, piston rod and the flexible cooperation of pneumatic cylinder are provided with one-level compressor arrangement between piston rod and the pneumatic cylinder outer wall, and the lateral wall of pneumatic cylinder is along radially seting up the liquid level hole of two vertical arrangements, and the liquid level hole feeds through the oil pocket in the pneumatic cylinder, and the liquid level hole is including high-order oilhole and low level oilhole, and high-order oilhole is located low level oilhole top, the downthehole equal threaded connection of liquid level has the end cap. The utility model has the advantages of it is following and effect: the new mechanical structure of this scheme utilization adopts the mode of two level holes about the lateral wall of pneumatic cylinder is seted up, has the effect of being convenient for detect fluid liquid level in the pneumatic cylinder.

Description

Elevator buffer

Technical Field

The utility model relates to an elevator safety equipment technical field, in particular to elevator buffer.

Background

The elevator buffer is one kind and installs the bottom at the elevator well for place the elevator case because of the contact bottom device that suddenly stops and damage, at present, the spring buffer for the elevator that uses in the trade includes a spring that is vertical arrangement, there is the buffer board at the top of spring, the bottom of spring is fixed in the bottom of elevator well, in operation, when the elevator case descends to being close elevator well bottom, the buffer board is pressed down, make its compression spring, the spring produces reaction force to the elevator case, and the size of this reaction force promotes along with the decline of elevator case steadily, reach the effect that makes the elevator case slow deceleration.

The elevator buffer needs the interval certain time to maintain in the use, and maintainer need highly inspect the fluid in the buffer, if fluid height is lower, need add appropriate fluid, but the unable direct detection of fluid liquid level obtains in prior art, and the maintenance process is more troublesome.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing an elevator buffer has the more convenient effect of maintenance.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides an elevator buffer, includes pneumatic cylinder and piston rod, and piston rod and the flexible cooperation of pneumatic cylinder are provided with one-level compressor arrangement between piston rod and the pneumatic cylinder outer wall, and the lateral wall of pneumatic cylinder is along radially offering two vertical liquid level holes of arranging, and the liquid level hole communicates the oil pocket in the pneumatic cylinder, and the liquid level hole is including high-order oilhole and low level oilhole, and high-order oilhole is located low level oilhole top, and the downthehole equal threaded connection of liquid level has the end cap.

Through adopting above-mentioned technical scheme, under the normal use condition, be annotated with fluid in the oil pocket of pneumatic cylinder, when maintainer detected the liquid level in the pneumatic cylinder, the pneumatic cylinder is vertical to be placed, pull down the end cap of high-order oilhole from high-order oilhole earlier, the pole that can stretch into in the oil pocket is used and is surveyed, if be stained with fluid on the pole, then the liquid level is higher, if do not have fluid, take off the end cap of low-order oilhole, the mode that equally adopts the pole to stretch into in the oil pocket detects the oil level, if be stained with fluid on the pole, it is lower to explain the liquid level, after stifled the end cap again, it can to pour into proper amount fluid in the pneumatic cylinder. Therefore, compared with the prior art, the device has the function of facilitating the maintenance process.

The present invention may be further configured in a preferred embodiment as: the interval between high-order oilhole and the low level oilhole sets up to 4 ~ 8 cm.

The present invention may be further configured in a preferred embodiment as: the interval between high-order oilhole and the low level oilhole sets up to 5 cm.

The present invention may be further configured in a preferred embodiment as: and two-stage compression devices are arranged in the piston rod and the hydraulic cylinder.

Through adopting above-mentioned technical scheme, when the elevator whereabouts, at first compress one-level compressor arrangement, compress second grade compressor arrangement afterwards, one-level compressor arrangement plays one-level cushioning effect to the piston rod, and second grade compressor arrangement plays second grade cushioning effect to the piston rod, and the buffering dynamics is bigger, adopts the mode of two-stage buffering for the effect of absorbing the impact energy is better, and the security is higher.

The present invention may be further configured in a preferred embodiment as: a bottom plate is arranged at the bottom of the hydraulic cylinder, a central pull rod is arranged in the hydraulic cylinder, the central pull rod is fixed on the bottom plate, a piston rod is movably sleeved on the central pull rod, and the piston rod is in telescopic fit with the central pull rod; the second-stage compression device comprises a spacer ring movably sleeved on the central pull rod, a return spring is arranged between the spacer ring and the bottom plate, the return spring drives the spacer ring to be away from the bottom plate, and when the first-stage compression device is compressed, the piston rod is abutted against the spacer ring and starts to compress the second-stage compression device.

Through adopting above-mentioned technical scheme, after one-level compressor arrangement was compressed for the piston rod lower extreme supports on the spacer ring, and the piston rod pushes down, and the drive spacer ring moves down along central pull rod, compresses reset spring, and reset spring can produce an ascending thrust to the piston rod through the spacer ring, makes the bounce during buffering less.

The present invention may be further configured in a preferred embodiment as: the inner wall of the hydraulic cylinder is provided with an annular check ring which is matched with the spacing ring in a resisting way.

By adopting the technical scheme, when the spacer ring moves downwards along the central pull rod, the annular check ring is abutted against the spacer ring, and under the action of impact force, the annular check ring penetrates through the spacer ring, so that a better buffering and abutting effect can be achieved to a certain extent.

The present invention may be further configured in a preferred embodiment as: the annular retainer ring divides an oil cavity of the hydraulic cylinder into an upper cavity and a lower cavity, the outer ring of the spacer ring is provided with a first guide surface, and the first guide surface drives the spacer ring to enter the lower cavity from the upper cavity; the inner ring of the annular retainer ring is provided with a second guide surface which drives the space ring to enter the upper cavity from the lower cavity.

By adopting the technical scheme, when the piston rod is subjected to downward impact force, the space ring is pushed into the lower cavity from the upper cavity under the guiding action of the first guide surface, and the space ring and the annular retainer ring are in a blocking action in the pushing process; when the oil liquid is reset, the spacer ring is pushed into the upper cavity from the lower cavity under the elastic force action of the second guide surface and the reset spring, the spacer ring and the annular check ring are in a resisting action in the pushing process, and in addition, the friction action between the spacer ring and the annular check ring is small and the abrasion is small under the lubricating action of the oil liquid.

The present invention may be further configured in a preferred embodiment as: an inner sleeve is arranged between the hydraulic cylinder and the piston rod and fixedly connected with the inner wall of the hydraulic cylinder, a double-layer sealing ring is arranged on the inner wall of the inner sleeve along the axial direction, and the sealing ring is in sealing fit with the piston rod.

By adopting the technical scheme, the mode of arranging the double-layer sealing ring between the inner sleeve of the hydraulic cylinder and the piston rod is adopted, so that the oil leakage can be avoided to a certain extent.

The present invention may be further configured in a preferred embodiment as: the upper end of the inner sleeve is provided with a first elastic check ring, the lower end of the inner sleeve is provided with a second elastic check ring, and the first elastic check ring and the second elastic check ring are in sliding fit with the piston rod.

By adopting the technical scheme, when the piston rod moves relative to the hydraulic cylinder in a telescopic mode, the inner rings of the first elastic check ring and the second elastic check ring can play a role in scraping oil on the side wall of the piston rod.

The present invention may be further configured in a preferred embodiment as: the top end of the piston rod is provided with an upper cover plate, the outer wall of the hydraulic cylinder is provided with a lower baffle plate, the primary compression device comprises a compression spring, and the compression spring drives the piston rod to move outwards the hydraulic cylinder; the upper cover plate is provided with the connecting block, and the lower baffle is provided with the fixed block, is provided with travel switch on the fixed block, the vertical switch contact lever that is provided with on the connecting block, and the lower extreme of switch contact lever sets up to the inclined plane, travel switch and the cooperation of contradicting on the inclined plane.

Through adopting above-mentioned technical scheme, when the elevator whereabouts produced pressure to one-level compressor arrangement, the piston rod drives the upper cover plate downstream for compression spring is compressed, drives switch contact lever downstream simultaneously, and when travel switch broke away from the ramp of switch contact lever, the circuit of control elevator was interrupted, so, had higher security.

To sum up, the utility model discloses following beneficial effect has:

1. the mode of forming an upper liquid level hole and a lower liquid level hole on the side wall of the hydraulic cylinder is adopted, so that the hydraulic cylinder has the effect of conveniently detecting the liquid level of oil in the hydraulic cylinder;

2. the two-stage buffering mode is adopted, so that the impact energy absorption effect is good, and the safety is high;

3. the inner wall of the hydraulic cylinder is provided with the annular retainer ring matched with the spacer ring in a resisting manner, when the spacer ring moves downwards along the central pull rod, the annular retainer ring and the spacer ring are resisted, and under the action of impact force, the annular retainer ring penetrates through the spacer ring, so that a better buffering resisting effect can be achieved to a certain extent.

Drawings

Fig. 1 is a schematic structural view of the overall structure of the embodiment.

Fig. 2 is a top view of the embodiment.

Fig. 3 is a sectional view of section a-a in fig. 2.

Reference numerals: 1. a hydraulic cylinder; 11. a high-position oil hole; 12. a low-position oil hole; 13. a plug; 14. a base plate; 15. a central pull rod; 16. an annular retainer ring; 161. a second guide surface; 17. an upper chamber; 18. a lower cavity; 2. a piston rod; 3. a first stage compression device; 31. a compression spring; 4. a secondary compression device; 41. a space ring; 411. a first guide surface; 42. a return spring; 5. an upper cover plate; 51. connecting blocks; 52. a switch contact lever; 521. a bevel; 6. a lower baffle plate; 61. a fixed block; 7. a travel switch; 8. an inner sleeve; 81. a first circlip; 82. a second circlip; 9. and (5) sealing rings.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

An elevator buffer is shown in figures 1-3 and comprises a hydraulic cylinder 1 and a piston rod 2, wherein the lower end of the piston rod 2 extends into the hydraulic cylinder 1, the piston rod 2 is in telescopic fit with the hydraulic cylinder 1, a primary compression device 3 is arranged between the piston rod 2 and the outer wall of the hydraulic cylinder 1, and a secondary compression device 4 is arranged between the piston rod 2 and the hydraulic cylinder 1.

As shown in fig. 3, two vertically arranged liquid level holes are radially formed in the side wall of the hydraulic cylinder 1, the liquid level holes are communicated with an oil cavity in the hydraulic cylinder 1, each liquid level hole comprises a high-position oil hole 11 and a low-position oil hole 12, the high-position oil hole 11 is located above the low-position oil hole 12, a plug 13 is in threaded connection with each liquid level hole, and the distance between the high-position oil hole 11 and the low-position oil hole 12 is set to be 5 cm.

As shown in fig. 1 and 3, an upper cover plate 5 is disposed at the top end of the piston rod 2, an annular lower baffle plate 6 is disposed on the outer wall of the hydraulic cylinder 1, the primary compression device 3 includes a compression spring 31, the upper end of the compression spring 31 abuts against the upper cover plate 5, the lower end of the compression spring 31 abuts against the lower baffle plate 6, and the compression spring 31 drives the piston rod 2 to move outward of the hydraulic cylinder 1; the upper cover plate 5 is provided with a connecting block 51, the lower baffle 6 is provided with a fixing block 61, the fixing block 61 is provided with a travel switch 7, a switch contact rod 52 is vertically arranged on the connecting block 51, the switch contact rod 52 penetrates through the fixing block 61, the lower end of the switch contact rod 52 is arranged to be an inclined plane 521, and the travel switch 7 is in interference fit with the inclined plane 521.

As shown in fig. 1 and 3, a bottom plate 14 is arranged at the bottom of the hydraulic cylinder 1, a central pull rod 15 is arranged in the hydraulic cylinder 1, the central pull rod 15 is fixed on the bottom plate 14, a piston rod 2 is movably sleeved on the central pull rod 15, and the piston rod 2 is in telescopic fit with the central pull rod 15; the secondary compression device 4 comprises a spacer ring 41 movably sleeved on the central pull rod 15, a return spring 42 is arranged between the spacer ring 41 and the bottom plate 14, the upper end of the return spring 42 abuts against the spacer ring 41, the lower end of the return spring 42 abuts against the bottom plate 14, the return spring 42 drives the spacer ring 41 to move upwards away from the bottom plate 14, and after the primary compression device 3 is compressed, the lower end of the piston rod 2 abuts against the upper surface of the spacer ring 41 and starts to compress the secondary compression device 4. An annular retainer ring 16 is arranged on the inner wall of the hydraulic cylinder 1, the annular retainer ring 16 is in abutting fit with the spacer ring 41, the annular retainer ring 16 divides an oil chamber of the hydraulic cylinder 1 into an upper chamber 17 and a lower chamber 18, a first guide surface 411 is arranged on the outer ring of the spacer ring 41, and the first guide surface 411 drives the spacer ring 41 to enter the lower chamber 18 from the upper chamber 17; the inner ring of the annular retainer 16 is provided with a second guide surface 161, the second guide surface 161 drives the spacer 41 from the lower cavity 18 into the upper cavity 17, and the center of the annular retainer 16 is provided for the spacer 41 to pass through.

When the piston rod 2 is subjected to downward impact force, the spacer 41 is pushed into the lower cavity 18 from the upper cavity 17 under the guiding action of the first guide surface 411, and the spacer 41 and the annular retainer ring 16 are in a resisting action in the pushing process; during resetting, under the elastic force action of the second guide surface 161 and the return spring 42, the spacer 41 is pushed into the upper cavity 17 from the lower cavity 18, and the spacer 41 and the annular retainer ring 16 are in a blocking effect in the pushing process, so that a good buffering and blocking effect can be achieved to a certain extent.

As shown in fig. 3, an inner sleeve 8 is arranged between the hydraulic cylinder 1 and the piston rod 2, the outer wall of the inner sleeve 8 is fixedly connected with the inner wall of the hydraulic cylinder 1, a double-layer sealing ring 9 is arranged on the inner wall of the inner sleeve 8 along the axial direction, and the sealing ring 9 is in sealing fit with the piston rod 2. The upper end of the inner sleeve 8 is provided with a first elastic retainer ring 81, the lower end of the inner sleeve 8 is provided with a second elastic retainer ring 82, and the first elastic retainer ring 81 and the second elastic retainer ring 82 are in sliding fit with the piston rod 2. The mode that the double-layer sealing ring 9 is arranged between the inner sleeve 8 of the hydraulic cylinder 1 and the piston rod 2 is adopted, so that the oil leakage can be avoided to a certain extent. When the piston rod 2 moves telescopically relative to the hydraulic cylinder 1, the inner rings of the first elastic check ring 81 and the second elastic check ring 82 can play a role in scraping oil on the side wall of the piston rod 2.

When the elevator falls and first generates pressure on the primary compression device 3, the piston rod 2 drives the upper cover plate 5 to move downwards, so that the compression spring 31 is compressed and simultaneously drives the switch contact rod 52 to move downwards until the travel switch 7 is separated from the inclined surface 521 of the switch contact rod 52, the circuit of the elevator is controlled to be interrupted, and therefore the elevator has high safety. And then, the second-stage compression device 4 is compressed when the piston falls down again, after the first-stage compression device 3 is compressed, the lower end of the piston rod 2 is abutted against the spacer ring 41, the piston rod 2 is pressed downwards, the spacer ring 41 is driven to move downwards along the central pull rod 15, the return spring 42 is compressed, and the return spring 42 can generate an upward thrust to the piston rod 2 through the spacer ring 41, so that the rebound force during buffering is smaller. One-level compressor arrangement 3 plays one-level cushioning effect to piston rod 2, and second grade compressor arrangement 4 plays second grade cushioning effect to piston rod 2, and the buffering dynamics is bigger, adopts the mode of two-stage buffering for the effect of absorbing the impact energy is better, and the security is higher.

The utility model discloses a basic operating principle does: under the normal use condition, be annotated with fluid in the oil pocket of pneumatic cylinder 1, when the liquid level of maintainer in to pneumatic cylinder 1 detected, pneumatic cylinder 1 was vertical to be placed, pull down end cap 13 from high-order oilhole 11 of first high-order oilhole 11, the use can stretch into the pole in the oil pocket and survey, if be stained with fluid on the pole, then the liquid level is higher, if there is not fluid, take off end cap 13 of low level oilhole 12, the mode that equally adopts the pole to stretch into in the oil pocket detects the oil level, if not be stained with fluid on the pole, it is lower to explain the liquid level, after stifled end cap 13 again, it can to pour into proper amount fluid into pneumatic cylinder 1. Therefore, compared with the prior art, the device has the function of facilitating the maintenance process.

The specific embodiments are only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiments without inventive contribution as required after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The utility model provides an elevator buffer, includes pneumatic cylinder (1) and piston rod (2), piston rod (2) with pneumatic cylinder (1) flexible cooperation, piston rod (2) with be provided with one-level compression device (3), its characterized in that between pneumatic cylinder (1) outer wall: the side wall of the hydraulic cylinder (1) is provided with two vertically arranged liquid level holes along the radial direction, the liquid level holes are communicated with an oil cavity in the hydraulic cylinder (1), each liquid level hole comprises a high-level oil hole (11) and a low-level oil hole (12), the high-level oil holes (11) are located above the low-level oil holes (12), and the liquid level holes are all in threaded connection with plugs (13).

2. An elevator buffer as defined in claim 1, wherein: the distance between the high-position oil hole (11) and the low-position oil hole (12) is set to be 4-8 cm.

3. An elevator buffer as defined in claim 2, wherein: the distance between the high-position oil hole (11) and the low-position oil hole (12) is set to be 5 cm.

4. An elevator buffer as defined in claim 1, wherein: and a secondary compression device (4) is arranged in the piston rod (2) and the hydraulic cylinder (1).

5. An elevator buffer as defined in claim 4, wherein: a bottom plate (14) is arranged at the bottom of the hydraulic cylinder (1), a central pull rod (15) is arranged in the hydraulic cylinder (1), the central pull rod (15) is fixed on the bottom plate (14), the piston rod (2) is movably sleeved on the central pull rod (15), and the piston rod (2) is in telescopic fit with the central pull rod (15); the secondary compression device (4) comprises a space ring (41) movably sleeved on the central pull rod (15), a return spring (42) is arranged between the space ring (41) and the bottom plate (14), the return spring (42) drives the space ring (41) to be far away from the bottom plate (14), and after the primary compression device (3) is compressed, the piston rod (2) is abutted against the space ring (41) and starts to compress the secondary compression device (4).

6. An elevator buffer as defined in claim 5, wherein: the inner wall of the hydraulic cylinder (1) is provided with an annular retainer ring (16), and the annular retainer ring (16) is matched with the spacer ring (41) in a propping manner.

7. An elevator buffer as defined in claim 6, wherein: the annular retainer ring (16) divides an oil cavity of the hydraulic cylinder (1) into an upper cavity (17) and a lower cavity (18), a first guide surface (411) is arranged on the outer ring of the spacer ring (41), and the first guide surface (411) drives the spacer ring (41) to enter the lower cavity (18) from the upper cavity (17); the inner ring of annular retaining ring (16) is provided with second spigot surface (161), second spigot surface (161) orders about space ring (41) by cavity of resorption (18) gets into epicoele (17).

8. An elevator buffer as defined in claim 1, wherein: the hydraulic cylinder (1) and an inner sleeve (8) is arranged between the piston rods (2), the inner sleeve (8) is fixedly connected with the inner wall of the hydraulic cylinder (1), a double-layer sealing ring (9) is arranged on the inner wall of the inner sleeve (8) along the axial direction, and the sealing ring (9) is in sealing fit with the piston rods (2).

9. An elevator buffer as defined in claim 8, wherein: the upper end of the inner sleeve (8) is provided with a first elastic retainer ring (81), the lower end of the inner sleeve (8) is provided with a second elastic retainer ring (82), and the first elastic retainer ring (81) and the second elastic retainer ring (82) are in sliding fit with the piston rod (2).

10. An elevator buffer as defined in claim 1, wherein: an upper cover plate (5) is arranged at the top end of the piston rod (2), a lower baffle plate (6) is arranged on the outer wall of the hydraulic cylinder (1), the primary compression device (3) comprises a compression spring (31), and the compression spring (31) drives the piston rod (2) to move outwards of the hydraulic cylinder (1); the upper cover plate (5) is provided with a connecting block (51), the lower baffle (6) is provided with a fixing block (61), a travel switch (7) is arranged on the fixing block (61), a switch contact rod (52) is vertically arranged on the connecting block (51), the lower end of the switch contact rod (52) is arranged to be an inclined plane (521), and the travel switch (7) is in interference fit with the inclined plane (521).