CN116231948A - Multi-stage cylinder capable of being thickened step by step - Google Patents

Multi-stage cylinder capable of being thickened step by step Download PDF

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Publication number
CN116231948A
CN116231948A CN202310308909.2A CN202310308909A CN116231948A CN 116231948 A CN116231948 A CN 116231948A CN 202310308909 A CN202310308909 A CN 202310308909A CN 116231948 A CN116231948 A CN 116231948A
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CN
China
Prior art keywords
screw rod
tube
nut
multistage cylinder
screw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310308909.2A
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Chinese (zh)
Inventor
郭季
孟自明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lim Tec Langfang Transmission Equipment Co ltd
Original Assignee
Lim Tec Langfang Transmission Equipment Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lim Tec Langfang Transmission Equipment Co ltd filed Critical Lim Tec Langfang Transmission Equipment Co ltd
Priority to CN202310308909.2A priority Critical patent/CN116231948A/en
Publication of CN116231948A publication Critical patent/CN116231948A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/003—Couplings; Details of shafts
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Abstract

The invention discloses a multi-stage cylinder which is thickened step by step, comprising: a first screw rod; a motor which drives the first screw rod to rotate; the second screw rod is of a hollow structure and is sleeved on the first screw rod in a matched manner through internal threads; one end of the nut is arranged on the second screw rod in a matching way through internal threads; the fixed pipe is coaxially and fixedly sleeved outside the screw rod and the nut; the first protection tube is coaxially sleeved outside the fixed tube and can move along the axial direction of the fixed tube; the second protective tube is coaxially sleeved outside the first protective tube and can move along the axial direction of the first protective tube; a front end connector for connecting a load; the front end connector is fixedly connected with the other end of the nut and one end of the second protection tube at the same time; when the second screw rod and the nut axially move to enable the multistage cylinder to extend or shorten, the first protection tube and the second protection tube axially move to protect the multistage cylinder.

Description

Multi-stage cylinder capable of being thickened step by step
Technical Field
The invention belongs to the technical field of electric cylinders, and particularly relates to a multistage cylinder which is thickened step by step.
Background
The electric cylinder converts the rotary motion of the motor into linear motion, and simultaneously converts the precise rotating speed control, precise rotating speed control and precise torque control of the motor into precise speed control, precise position control and precise thrust control; realizing a brand new revolutionary product of high-precision linear motion series. At present, the traditional electric cylinder structure is single-stage screw rod transmission, and to the occasion that installation space is restricted, the size of single-stage electric cylinder often can't satisfy the operation requirement, and in outdoor use occasion, traditional electric cylinder protection tube becomes thin step by step, is unfavorable for the drainage.
Disclosure of Invention
The invention aims to provide a multistage cylinder which is thickened step by step, which is provided with a plurality of protective pipes, wherein the diameters of the protective pipes are gradually increased along the direction from the power input end to the load end of the multistage cylinder, so that the multistage cylinder has better waterproof effect.
The technical scheme provided by the invention is as follows:
a multi-stage cylinder that is thickened step by step, comprising:
a first screw rod;
a motor which drives the first screw rod to rotate;
the second screw rod is of a hollow structure and is sleeved on the first screw rod in a matched manner through internal threads;
one end of the nut is arranged on the second screw rod in a matching way through internal threads;
the fixed pipe is coaxially and fixedly sleeved outside the screw rod and the nut;
the first protection tube is coaxially sleeved outside the fixed tube and can move along the axial direction of the fixed tube;
the second protective tube is coaxially sleeved outside the first protective tube and can move along the axial direction of the first protective tube;
a front end connector for connecting a load; the front end connector is fixedly connected with the other end of the nut and one end of the second protection tube at the same time;
when the second screw rod and the nut axially move to enable the multistage cylinder to be lengthened or shortened, the first protection tube and the second protection tube axially move to protect the multistage cylinder.
Preferably, a first guide groove is axially formed in the outer wall of the fixed pipe; the first guard tube is fixedly provided with a first anti-rotation pin, and the first anti-rotation pin can axially move along the first guide groove.
Preferably, a second guide groove is axially formed in the outer wall of the first protection tube; the second guard tube is fixedly provided with a second anti-rotation pin, and the second anti-rotation pin can axially move along the second guide groove.
Preferably, both ends of the first guide groove and the second guide groove are respectively provided with a limiting part.
Preferably, the multi-stage cylinder with stepwise thickening further comprises:
the first screw rod guide support seat is fixedly arranged at one end, close to the front end connector, of the first screw rod;
the first lead screw guiding and supporting bearing is sleeved on the first lead screw guiding and supporting seat, and the outer ring of the first lead screw guiding and supporting bearing is supported on the inner wall of the second lead screw.
Preferably, one end of the second screw rod is connected to the first screw rod through internal threads, and a second screw rod guide support seat is arranged at the other end of the second screw rod;
the second lead screw guide support seat is sleeved with a second guide support bearing, and the outer ring of the second guide support bearing is supported on the inner wall of the nut.
Preferably, a first end cover is fixedly connected to one end, far away from the front end connector, of the first protection tube, and a first sealing ring and a first protection tube guide bearing are mounted on the inner wall of the first end cover.
Preferably, the other end of the second protection tube is fixedly connected with a second end cover, and a second sealing ring and a second protection tube guide bearing are arranged on the inner wall of the second end cover.
Preferably, the front end cover plate is integrated on the front end connector, and the front end cover plate simultaneously seals the end openings of the nut and the second protection tube and is fixedly connected with the end parts of the nut and the second protection tube.
The beneficial effects of the invention are as follows:
the stepped thickening multistage cylinder provided by the invention has smaller shrinkage dimension and larger elongation dimension; and the diameters of the plurality of protective pipes are gradually increased along the direction from the power input end to the load end of the multistage cylinder, so that the multistage cylinder has better waterproof effect.
Drawings
Fig. 1 is a schematic general structure of a multi-stage cylinder with stepwise thickening according to the present invention.
Fig. 2 is a schematic cross-sectional view of a stepped-thickening multistage cylinder according to the present invention along the direction of a first guide groove.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
As shown in fig. 1-2, the present invention provides a stepped thickening multistage cylinder comprising: the device comprises a motor 1, a speed reducer 2, a gear box 3, a driving wheel 4, a gear box cover 5, an auxiliary bearing 6, a driven wheel 7, a bearing lock nut 8, a main bearing 9, a bearing chamber 10, a first screw rod 11, a fixed pipe splicing nut 12, a first sealing ring 13, a first end cover 14, a first protection pipe guide bearing 15, a first protection pipe 16, a second sealing ring 17, a second protection pipe guide bearing 18, a second end cover 19, a second anti-rotation pin 20, a second protection pipe 21, a second screw rod 22, a nut 23, a fixed pipe 24, a first guide groove 25, a first screw rod guide support seat 26, a first screw rod guide support bearing 27, a first screw rod guide support pressing block 28, a second screw rod guide support seat 29, a second screw rod guide support bearing 30, a second screw rod guide support pressing block 31, a front end cover plate 32, screws 33, screws 34, a first anti-rotation pin 35, a lower fish ear 36, a second guide groove 37 and a front end connector 38.
The speed reducer 2 has a speed reducing and moment increasing structure, and the input end of the speed reducer 2 is connected with the output shaft of the motor 1. Wherein, the motor 1 can adopt a servo motor, a three-phase asynchronous motor or a direct current motor, etc. In the present embodiment, the speed reducer 2 is a planetary speed reducer. The driving wheel 4 is of a gear structure, and the driving wheel 4 is connected with an output shaft of the speed reducer 2 through a flat key. The speed reducer 2 reduces the speed of the motor 1 and then transmits the reduced speed to the driving wheel 4. The driven wheel 7 is of a gear structure, is meshed with the driving wheel 4 for transmission, and the driven wheel 7 is connected with one end of the first screw rod 11 through a flat key to transmit motion and power to the first screw rod 11. The gear box 3 is covered outside the driving wheel 4 and the driven wheel 7 and is used for accommodating the driving wheel 4 and the driven wheel 7. Wherein the housing of the speed reducer 2 is fixedly mounted on the right end plate of the gear box 3. A gear box cover 5 is mounted at the left end of the gear box 3 for sealing the gear box 3. Two auxiliary bearings 6 are arranged on the inner side of the gear box cover 5, and a lower fish ear 36 integrated with the auxiliary bearings is arranged on the outer side of the gear box cover 5. The lower lugs 36 are used to secure the multi-stage cylinders and to unload the load to the external frame. Wherein, two auxiliary bearings 6 are respectively corresponding to the driving wheel 4 and the driven wheel 7 one by one and are used for positioning and supporting the driving wheel 4 and the driven wheel 7.
One end of a bearing chamber 10 is fixedly connected to the left end of the gear box 3, and a main bearing 9 is arranged in the bearing chamber.
The first screw rod 11 is rotatably supported in the main bearing 9, wherein a bearing housing 10 is used for supporting and protecting the main bearing 9. A bearing lock nut 8 is arranged in the bearing chamber 10 and is used for locking the inner ring of the main bearing 9. The main bearing 9 is subjected to external load pushing or pulling forces. The first screw 11 may be a trapezoidal screw, a ball screw or a roller screw, and the first screw 11 transfers the final load to the main bearing 9 and then performs unloading through the bearing chamber 10, the gear box 3, the gear box cover 5 and the lower fish ear 36.
The second screw rod 22 is of a hollow structure, the left end of the second screw rod 22 is provided with an internal thread, and the second screw rod 22 is sleeved on the first screw rod 11 in a matching manner through the internal thread. Meanwhile, the second screw rod 22 is provided with external threads, and the left end of the nut 23 is installed on the second screw rod 22 in a matching manner through internal threads.
The first lead screw guide support 26 is fixedly mounted on the first lead screw 22 at an end thereof adjacent the front end fitting 38. The first screw guide support bearing 27 is sleeved on the first screw guide support seat 26, and the outer ring of the first screw guide support bearing 27 is supported on the inner wall of the second screw 22. The first screw guide support pressing block 28 is screwed at the right end of the first screw 11 through threads and is used for pressing the first screw guide support seat 26. A first screw guide support bearing 27 is provided for supporting the first screw 11.
As one preferable option, the right end of the second screw 22 is provided with a second screw guide support seat 29; the second lead screw guide support seat 29 is sleeved with a second guide support bearing 30, and the outer ring of the second guide support bearing 30 is supported on the inner wall of the nut 23. The second screw guide support pressing block 31 is screwed on the right end of the second screw 22 through threads and is used for pressing the second screw guide support seat 29. A second guide support bearing 30 is provided for supporting the second lead screw 22.
The fixed pipe 24 is coaxially sleeved outside the first screw rod 11, the second screw rod 22 and the nut 23; one end of the fixed tube 24 is connected to the bearing chamber 10, and a first guide groove 25 is formed in the outer wall of the fixed tube 24 in the axial direction. The dead tube tightening nut 12 locks the dead tube 24 and adjusts the direction of the dead tube 24, i.e., the direction of the first guide groove 25.
The first protection pipe 16 is coaxially sleeved outside the fixed pipe 24 and is used for protecting the multistage cylinder; first sheath 16 is movable in the axial direction of stationary tube 24. The first guard pipe 16 is provided with a first rotation preventing pin 35 by screw threads, and the first rotation preventing pin 35 can move along the first guide groove 25 to play a role in preventing rotation.
The second protection tube 21 is coaxially sleeved outside the first protection tube 16 for protecting the multistage cylinder, and the second protection tube 21 can move axially along the first protection tube 16. Wherein, the outer wall of the first protection tube 16 is provided with a second guide groove 37 along the axial direction; the second guard pipe 21 is provided with a second rotation preventing pin 20 by screw threads, and the second rotation preventing pin 20 can move along the second guiding groove shaft 37 to play a role in preventing rotation.
Wherein, both ends of the first guide groove 25 and the second guide groove 37 are respectively provided with a limiting part for limiting the moving range of the first protection tube 16 and the second protection tube 21.
The front end connector 38 is used for connecting a load; the front end fitting 38 is fixedly connected to the other end (right end) of the nut 23 and one end (right end) of the second grommet 21. When the second screw rod 22 and the nut 23 axially move to extend or shorten the multistage cylinder, the first protection tube 16 and the second protection tube 21 axially move to protect the multistage cylinder.
In the present embodiment, the front end fitting 38 is integrated with the front end cover plate 32, and the front end cover plate 32 simultaneously seals the end openings of the nut 23 and the second protection tube 21, and is fixedly connected with the ends of the nut 23 and the second protection tube 21.
The first end cover 14 is provided on the end of the first protection tube 16 far away from the front end joint 38 (the left end of the first protection tube 16), the first end cover 14 is connected to the first protection tube 16 through screws, and the first sealing ring 13 and the first protection tube guiding bearing 15 are mounted on the inner wall of the first end cover 14. The first sealing ring 13 can prevent external dust and water from entering the inside of the multistage cylinder, so that the inside of the multistage cylinder always keeps a clean environment, because impurities or water can cause rapid abrasion of the screw rod and the nut, and the multistage cylinder is scrapped. The first sheath guide bearing 15 serves to guide the first sheath 16.
The left end of the second protection tube 16 is fixedly connected with a second end cover 19 through a screw, and a second sealing ring 17 and a second protection tube guide bearing 18 are arranged on the inner wall of the second end cover 19. The second sealing ring 17 prevents external dust and water from entering the inside of the stages, so that the inside of the stages is always kept in a clean environment, because the entry of impurities or water may cause rapid abrasion of the screw and the nut, thereby scrapping the multistage cylinder. The second sheath guide bearing 18 is used to guide the movement of the second sheath.
The working process of the multistage cylinder which is thickened step by step comprises the following steps:
the motor 1 is electrified, the motor shaft rotates, the motor shaft transmits motion to the planetary reducer 2 through the anchor ear or the flat key, the output shaft of the planetary reducer 2 starts to rotate, and then the driving wheel 4 is driven to rotate through the flat key on the output shaft. The driving wheel 4 transmits the motion to the driven wheel 7. The driven wheel 7 transmits motion to the first screw rod 11 through a flat key, the first screw rod 11 rotates, an internal thread matched with the external thread of the first screw rod 11 is arranged in the second screw rod 22, at the moment, the second screw rod 22 moves linearly until the end part of the internal thread of the second screw rod 22 contacts the first screw rod guide support seat 26, at the moment, the linear motion of the second screw rod is limited, but the first screw rod 11 still moves rotationally, at the moment, the second screw rod 22 moves rotationally together with the first screw rod 11, the second nut 23 moves linearly, and meanwhile, the front end connector 38 fixedly connected with the second screw rod 22 is driven to move linearly.
The fixed pipe 24 is fixed on the bearing chamber 10 through threads, the fixed pipe 24 is non-rotatable, a first guide groove 25 is arranged on the fixed pipe 24, a first anti-rotation pin 35 is screwed on the first protection pipe 16 through threads and moves along the first guide groove 25 arranged on the fixed pipe 24, the fixed first protection pipe 16 is likewise non-rotatable, the same is true, and a second anti-rotation pin 20 is screwed on the second protection pipe 21 through threads and moves along a second guide groove 37 on the first protection pipe 16 to play a role in preventing rotation.
The multi-stage cylinder retraction process is the reverse of the above process and will not be described in detail herein.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.

Claims (9)

1. A stepped thickening multistage cylinder comprising:
a first screw rod;
a motor which drives the first screw rod to rotate;
the second screw rod is of a hollow structure and is sleeved on the first screw rod in a matched manner through internal threads;
one end of the nut is arranged on the second screw rod in a matching way through internal threads;
the fixed pipe is coaxially and fixedly sleeved outside the screw rod and the nut;
the first protection tube is coaxially sleeved outside the fixed tube and can move along the axial direction of the fixed tube;
the second protective tube is coaxially sleeved outside the first protective tube and can move along the axial direction of the first protective tube;
a front end connector for connecting a load; the front end connector is fixedly connected with the other end of the nut and one end of the second protection tube at the same time;
when the second screw rod and the nut axially move to enable the multistage cylinder to be lengthened or shortened, the first protection tube and the second protection tube axially move to protect the multistage cylinder.
2. The progressive coarsening multistage cylinder of claim 1, wherein a first guide groove is axially formed in an outer wall of the stationary pipe; the first guard tube is fixedly provided with a first anti-rotation pin, and the first anti-rotation pin can axially move along the first guide groove.
3. The progressive coarsening multistage cylinder according to claim 2, wherein a second guide groove is axially formed in the outer wall of the first protection tube; the second guard tube is fixedly provided with a second anti-rotation pin, and the second anti-rotation pin can axially move along the second guide groove.
4. A progressive coarsening multistage cylinder as in claim 3, wherein the first and second guide slots each have a limit portion at each end.
5. The progressive coarsening multistage cylinder of claim 1 or 4, further comprising:
the first screw rod guide support seat is fixedly arranged at one end, close to the front end connector, of the first screw rod;
the first lead screw guiding and supporting bearing is sleeved on the first lead screw guiding and supporting seat, and the outer ring of the first lead screw guiding and supporting bearing is supported on the inner wall of the second lead screw.
6. The progressive coarsening multistage cylinder according to claim 5, wherein one end of the second screw is connected to the first screw through internal threads, and a second screw guide support seat is installed at the other end;
the second lead screw guide support seat is sleeved with a second guide support bearing, and the outer ring of the second guide support bearing is supported on the inner wall of the nut.
7. The progressive coarsening multistage cylinder of claim 6, wherein a first end cap is fixedly connected to an end of the first protective tube remote from the front end fitting, and a first seal ring and a first protective tube guide bearing are mounted on an inner wall of the first end cap.
8. The progressive coarsening multistage cylinder of claim 7, wherein the second shroud tube other end is fixedly connected with a second end cap, and a second seal ring and a second shroud tube guide bearing are mounted on an inner wall of the second end cap.
9. The progressive coarsening multistage cylinder of claim 8, wherein the front end is integrated with a front end cover plate that simultaneously closes off the end openings of the nut and the second shield tube and is fixedly connected with the ends of the nut and the second shield tube.
CN202310308909.2A 2023-03-28 2023-03-28 Multi-stage cylinder capable of being thickened step by step Pending CN116231948A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310308909.2A CN116231948A (en) 2023-03-28 2023-03-28 Multi-stage cylinder capable of being thickened step by step

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310308909.2A CN116231948A (en) 2023-03-28 2023-03-28 Multi-stage cylinder capable of being thickened step by step

Publications (1)

Publication Number Publication Date
CN116231948A true CN116231948A (en) 2023-06-06

Family

ID=86578815

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310308909.2A Pending CN116231948A (en) 2023-03-28 2023-03-28 Multi-stage cylinder capable of being thickened step by step

Country Status (1)

Country Link
CN (1) CN116231948A (en)

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