CN217335336U

CN217335336U - Multistage electric cylinder structure adopting pulley block and single screw transmission

Info

Publication number: CN217335336U
Application number: CN202220275582.4U
Authority: CN
Inventors: 宋方; 乔晶晶
Original assignee: Xi'an Fangyuanmingxin Precision Electromechanical Manufacturing Co ltd
Current assignee: Xi'an Fangyuanmingxin Precision Electromechanical Manufacturing Co ltd
Priority date: 2022-02-11
Filing date: 2022-02-11
Publication date: 2022-08-30
Anticipated expiration: 2032-02-11

Abstract

The utility model provides an adopt movable pulley and single screw driven multistage electronic jar structure, belong to electronic jar application technical field, adopt assembly pulley and single screw driven structural style, the straight line with the lead screw is actuated and is combined together with the assembly pulley transmission, install on push rod assembly and stretch jar movable pulley, install on the bearing frame and stretch jar quiet pulley, constitute and rise the jar assembly pulley, the distance of release load is the triple of nut extension distance, it installs at second grade cylinder afterbody to shrink jar movable pulley, it installs at one-level cylinder inner wall to shrink jar quiet pulley, constitute and contract the jar assembly pulley, load withdrawal distance is the triple of nut withdrawal distance, tertiary cylinder, the second grade cylinder, install supporting component between the push rod. The utility model discloses a assembly pulley and single screw driven electronic jar structure, the form is compact, and operating stability is good, transmission simple structure, and the operational reliability is high.

Description

Multistage electric cylinder structure adopting pulley block and single screw transmission

Technical Field

The utility model relates to an electronic jar application technology field specifically is an adopt assembly pulley and single screw driven multistage electronic jar structure.

Background

With the development of engineering machinery industry, the electric cylinder has wide application in a plurality of important fields such as industry, agriculture, national defense industry and the like.

Because the concertina ratio of ordinary electronic jar is little, it is bulky, bear reasons such as little, multistage electronic jar becomes one of the key technology of research in this field at present, current multistage electronic jar structure mainly is in the same place through many screw pair suit each other, lead screw nut at different levels drives the push rod at different levels and stretches out and draws back step by step, it is obvious, the stroke of electronic jar can be reduced in the increase of lead screw nut length at different levels, in addition, the lead screw more than the traditional multistage electronic jar second grade all uses hollow lead screw, hollow lead screw's processing technology is complicated, the installation degree of difficulty is big, high in production cost, the production cycle is long, make traditional electronic jar have a series of defects that remain to solve from this. Consequently, it is very necessary to carry out the innovative design on original multistage electronic jar structure, for this reason the utility model provides an adopt assembly pulley and single screw driven multistage electronic jar structure, adopt assembly pulley and single screw driven structural style to it is big, problem with high costs to solve the prior art production and processing degree of difficulty.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an adopt assembly pulley and single screw driven multistage electronic jar structure to solve the traditional multistage electronic jar hollow lead screw production and processing degree of difficulty that proposes among the above-mentioned background art big, problem with high costs.

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

a multistage electric cylinder structure adopting a pulley block and a single screw for transmission comprises a screw pair, a main bearing, a first-stage cylinder assembly, a second-stage cylinder assembly, a third-stage cylinder assembly, a push rod assembly, a cylinder extending pulley block, a cylinder retracting pulley block, a first-stage cylinder end cover, a second-stage cylinder end cover, a cylinder extending steel rope, a cylinder retracting steel rope, a bearing seat, a gear box body, a driving wheel, a driven wheel and a motor.

The lead screw and the lead screw nut form a lead screw pair, the lead screw nut is connected with a push rod flange, a cylinder extending movable pulley is installed at the front end of the push rod, a third-level cylinder barrel is sleeved on the push rod, a second-level cylinder barrel is sleeved on the third-level cylinder barrel, a first-level cylinder barrel is sleeved on the second-level cylinder barrel, a gear transmission pair is installed inside a gear box, a motor input end is installed at the input end of the gear box, a motor shaft drives a driving wheel, a driven wheel drives the lead screw, the lead screw rotates, a guide key on the flange of the second-level cylinder barrel is matched with a key groove in the inner wall of the cylinder barrel, the lead screw nut only stretches and does not rotate under the driving of the lead screw, the lead screw nut drives the push rod and the second-level cylinder barrel to stretch, the third-level cylinder barrel is driven to stretch through the cylinder extending pulley and the cylinder retracting pulley, a support lug is installed at the front end of the third-level cylinder barrel and connected with a load, and therefore linear actuation of the load is achieved.

The screw nut is connected with a push rod flange, the second-stage cylinder flange is connected with the screw nut flange, a guide key is arranged on the outer circle of the second-stage cylinder flange and matched with a key groove in the inner wall of the first-stage cylinder, the screw is driven to rotate by the torque of the screw, and the screw nut drives the push rod to linearly stretch and retract with the second-stage cylinder under the limiting of the guide key.

The three-level cylinder barrel is sleeved on the push rod, a push rod flange support ring is installed at the front end of the push rod and supported on the inner wall of the three-level cylinder barrel, the three-level cylinder barrel flange support ring is installed at the tail of the three-level cylinder barrel and supported on the outer wall of the push rod, the push rod and the three-level cylinder barrel are enabled to linearly extend and retract relative to the coaxial line, a flange is arranged at the front end of the three-level cylinder barrel and connected with an upper lug, and the upper lug is connected with a load.

The second grade cylinder suit is on tertiary cylinder, and the second grade end cover subassembly is installed to the second grade cylinder front end, and when second grade cylinder and tertiary cylinder relative motion, the second grade end cover subassembly plays the supporting role, makes second grade cylinder and the relative coaxial line straight line of tertiary cylinder flexible, and second grade cylinder afterbody and screw nut flange joint, second grade cylinder and screw nut are flexible in step.

The one-level cylinder suit is on second grade cylinder, and second grade cylinder, push rod, lead screw nut three flange joint carry out radially spacingly with the groove fit of one-level cylinder inner wall to cylinder, push rod, lead screw nut, and one-level cylinder front end and one-level cylinder end cover subassembly flange joint, one-level cylinder end cover subassembly play the supporting role to the flexible of second grade cylinder, one-level cylinder afterbody and bearing frame, gear box body flange joint.

The cylinder stretching movable pulley is arranged at the front end of the third-stage cylinder barrel, the cylinder stretching reversing pulley is arranged on the cylinder stretching movable pulley, the cylinder stretching static pulley is arranged on the bearing seat, the steel wire rope is initially arranged at the center of the cylinder stretching movable pulley, passes through the third-stage cylinder barrel and the second-stage cylinder barrel flange through the reversing pulley, bypasses the cylinder stretching static pulley, and is connected with the tail flange of the third-stage cylinder barrel after bypassing the cylinder stretching movable pulley. The lead screw nut stretches out to drive the push rod and the movable pulley to stretch out, the steel wire rope drives the three-stage cylinder barrel to stretch out, and the stretching distance of the three-stage cylinder barrel is three times of that of the lead screw nut.

The cylinder-retracting movable pulley is arranged on a flange at the tail part of the second-stage cylinder, the cylinder-retracting static pulley is arranged on the inner wall of the first-stage cylinder, the steel wire rope is initially arranged at the center of the cylinder-retracting movable pulley, bypasses the cylinder-retracting static pulley and then bypasses the cylinder-retracting movable pulley to be connected with the tail part of the third-stage cylinder, the screw nut retracts to drive the second-stage cylinder and the cylinder-retracting movable pulley to retract, the steel wire rope drives the third-stage cylinder to retract, and the retracting distance of the third-stage cylinder is three times of the retracting distance of the screw nut.

When the screw nut extends out, the extending distance of the third-stage cylinder barrel is three times of the extending distance of the screw nut, the cylinder-retracting movable pulley is connected with the second-stage cylinder barrel through a flange, and the steel wire rope of the cylinder-retracting pulley block keeps tight but is not stressed.

When the screw nut retracts, the retraction distance of the third-stage cylinder barrel is three times of that of the screw nut, the cylinder extending movable pulley is connected with the second-stage cylinder barrel, and the cylinder extending pulley block steel wire rope keeps tight but is not stressed.

A multi-stage electric cylinder structure transmission method adopting a pulley block and a single lead screw comprises the following steps:

step one, extending an electric cylinder: the motor output shaft torque drives a driving wheel in the gear box assembly, the driving wheel and a driven wheel are meshed to drive a lead screw to rotate, a lead screw nut can only linearly extend out under radial limitation, the lead screw nut drives a push rod and a second-stage cylinder barrel to extend out, the push rod drives a cylinder extending movable pulley to extend out, the cylinder extending movable pulley drives a cylinder extending steel wire rope to transmit, the cylinder extending steel wire rope pulls a third-stage cylinder barrel to extend out, and therefore a load is driven to extend out.

Step two, retracting action of the electric cylinder: a motor reversely rotates an output shaft to drive a driving wheel in a gear box assembly, the driving wheel and a driven wheel are meshed to drive a lead screw to rotate, a lead screw nut can only retract linearly under radial limitation, the lead screw nut drives a push rod to retract with a second-stage cylinder barrel, the second-stage cylinder barrel drives a cylinder retracting movable pulley to retract, the cylinder retracting movable pulley drives a cylinder retracting steel rope to transmit, and the cylinder retracting steel rope pulls a third-stage cylinder barrel to retract, so that load retraction is realized.

The utility model has the advantages that: the utility model provides an adopt assembly pulley and single screw driven multistage electronic jar structure, its structural style is compact, and the processing technology is simple, the installation degree of difficulty is low, is suitable for the heavy load operating mode, can provide bigger stroke under equal installation distance, the overall dimension, has improved the stability, security, the environmental suitability of multistage electronic jar simultaneously.

Drawings

The technical principle of the present invention will be described in detail with reference to the accompanying drawings, so that the technical line and the advantages thereof can be more clearly and completely understood, and the drawings described herein are only used for providing further understanding of the present invention, and constitute a part of the present invention, and the exemplary embodiments and descriptions thereof of the present invention are used for explaining the present invention, and do not constitute improper limitations of the present invention, as shown in the drawings:

fig. 1 is a schematic view of a multi-stage electric cylinder driven by a pulley block and a single screw according to the present invention;

fig. 2 is a schematic view of a gearbox assembly in a multi-stage electric cylinder structure driven by a pulley block and a single screw according to the present invention;

fig. 3 is a schematic view of a screw assembly in a multi-stage electric cylinder structure driven by a pulley block and a screw according to the present invention;

fig. 4 is a schematic view of a cylinder-extending pulley assembly in a multi-stage electric cylinder structure driven by a pulley block and a single screw according to the present invention;

fig. 5 is a schematic view of a primary cylinder barrel assembly in a multi-stage electric cylinder structure driven by a pulley block and a single screw according to the present invention;

fig. 6 is a schematic view of a retractable cylinder pulley assembly in a multi-stage electric cylinder structure driven by a pulley block and a single screw according to the present invention;

fig. 7 is a schematic view of a secondary cylinder barrel assembly in a multi-stage electric cylinder structure driven by a pulley block and a single screw according to the present invention;

fig. 8 is a schematic view of a three-stage cylinder barrel assembly in a multi-stage electric cylinder structure driven by a pulley block and a single screw according to the present invention;

fig. 9 is a schematic view of a push rod assembly in a multi-stage electric cylinder structure driven by a pulley block and a single screw according to the present invention;

wherein: 10. a motor; 20. a gearbox assembly; 30. a lead screw assembly; 40. a cylinder extending pulley block; 50. a first-stage cylinder barrel assembly; 60. a cylinder retracting pulley block; 70. a secondary cylinder barrel assembly; 80. a tertiary cylinder barrel assembly; 90. a push rod assembly; 21. a gear housing; 22. a gearbox cover; 23. a driving wheel; 24. a driven wheel; 25. a lower lug; 26. a bearing seat; 31. a lead screw; 32. a bearing; 33. a lead screw nut; 41. a cylinder extending static pulley; 42. a cylinder extending steel rope; 43. a diverting pulley; 44. extending a cylinder movable pulley; 51. a first-stage cylinder barrel; 52. a first-stage cylinder end cover; 53. a first-stage cylinder end cover support ring; 61. a cylinder-contracting movable pulley; 62. a cylinder contracting steel rope; 63. a cylinder-contracting static pulley; 71. a second-stage cylinder barrel flange support ring; 72. a second-stage cylinder barrel flange; 73. a second-stage cylinder barrel; 74. a secondary cylinder end cover; 75. a secondary cylinder end cover support ring; 81. a third-stage cylinder barrel flange; 82. a tertiary cylinder barrel flange support ring; 83. a third-stage cylinder barrel; 84. an upper lug; 91. a push rod; 92. a push rod flange; 93. the push rod flange supports the ring.

Detailed Description

To further clarify the objects, technical solutions and advantages of the embodiments of the present invention, the present invention will be described in connection with the accompanying drawings and embodiments, and it is to be understood that the described embodiments are only some embodiments of the present invention, and not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Embodiments of the present invention will be described in detail with reference to fig. 1 to 9.

According to the figures 1-9, a multi-stage electric cylinder structure adopting a pulley block and a single screw rod for transmission comprises a motor (10), a gear box assembly (20), a lead screw assembly (30), a cylinder extending pulley block (40), a first-stage cylinder barrel assembly (50), a cylinder retracting pulley block (60), a second-stage cylinder barrel assembly (70), a third-stage cylinder barrel assembly (80), a push rod assembly (90), a gear box body (21), a gear box cover (22), a driving wheel (23), a driven wheel (24), a lower lug (25), a bearing seat (26), a lead screw (31), a bearing (32), a lead screw nut (33), a cylinder extending static pulley (41), a cylinder extending steel rope (42), a reversing pulley (43), a cylinder extending movable pulley (44), a first-stage cylinder barrel (51), a first-stage cylinder barrel end cover (52), a first-stage end cover cylinder barrel support ring (53), a cylinder retracting movable pulley (61), a cylinder retracting steel rope (62), The cylinder-retracting type cylinder-retracting mechanism comprises a cylinder-retracting static pulley (63), a secondary cylinder barrel flange support ring (71), a secondary cylinder barrel flange (72), a secondary cylinder barrel (73), a secondary cylinder barrel end cover (74), a secondary cylinder barrel end cover support ring (75), a tertiary cylinder barrel flange (81), a tertiary cylinder barrel flange support ring (82), a tertiary cylinder barrel (83), an upper lug (84), a push rod (91), a push rod flange (92) and a push rod flange support ring (93).

The bearing seat is connected with a gear box body (21) and a first-stage cylinder barrel (51) through flanges, the input end of the gear box body (21) is connected with a motor (10) through a flange, a driving wheel (23) and a driven wheel (24) are installed inside the gear box body (21), a bearing (32) is installed on a lead screw (31) and fixed with the bearing seat (26), a lead screw nut (33) is connected with a push rod (91) through a flange, the top end of the push rod (91) is connected with a push rod flange (92), a push rod flange support ring (93) is installed on the push rod flange (92), the push rod flange support ring (93) is supported on the inner wall of a third-stage cylinder barrel (83), the third-stage cylinder barrel (83) is connected with a third-stage cylinder barrel flange (81) and sleeved on the push rod (91), a third-stage cylinder barrel flange support ring (82) is installed on the third-stage flange (81) and supported on the outer wall of the push rod (91), and the top end of the third-stage cylinder barrel (83) is connected with an upper support lug (84) through a flange, second grade cylinder (73) are connected with second grade cylinder flange (72), second grade cylinder flange (72) and screw nut (33) flange joint, second grade cylinder (73) are with push rod (91) whole flexible under screw nut (33) drive, installation second grade cylinder flange support ring (71) and one-level cylinder (51) inner wall support on second grade cylinder flange (72), second grade cylinder (73) top is connected with second grade cylinder end cover (74), second grade cylinder end cover (74) internally mounted second grade cylinder end cover support ring (75) and tertiary cylinder (83) outer wall support, one-level cylinder (51) and bearing frame (26) flange joint, one-level cylinder (51) top is connected with one-level cylinder end cover (52), install one-level cylinder end cover support ring (53) in one-level cylinder end cover (52) and support with second grade cylinder (73) outer wall. Stretch jar movable pulley (44) and install at tertiary cylinder (83) front end, stretch jar switching-over pulley (43) on stretching jar movable pulley (44), stretch jar quiet pulley (63) and install on bearing frame (26), stretch jar steel cable (62) and begin to install and stretch jar movable pulley (44) center, pass tertiary cylinder (83), second grade cylinder flange (72) through switching-over pulley (43), bypass and stretch jar quiet pulley (63), are connected with tertiary cylinder flange (81) after bypassing stretching jar movable pulley (44). The cylinder-contracting movable pulley (61) is installed on the second-stage cylinder flange (72), the cylinder-contracting static pulley (63) is installed on the inner wall of the first-stage cylinder (51), and the cylinder-contracting steel rope (62) is initially installed in the center of the cylinder-contracting movable pulley (61), bypasses the cylinder-contracting static pulley (63), and bypasses the cylinder-contracting movable pulley (61) to be connected with the third-stage cylinder flange (81).

The motor (10) output shaft torque drives a driving wheel (23) in a gear box assembly (20), the driving wheel (23) and a driven wheel (24) are meshed to drive a lead screw (31) to rotate, a lead screw nut (33) can only do straight line extension under radial limitation, the lead screw nut (33) drives a push rod (91) and a secondary cylinder barrel (73) to extend, the push rod (91) drives an extension cylinder movable pulley (44) to extend, the extension cylinder movable pulley (44) drives an extension cylinder steel rope (62) to transmit, the extension cylinder steel rope (62) pulls a tertiary cylinder barrel (83) to extend, and therefore a load is driven to extend. The motor (10) rotates reversely to drive the driving wheel (23) in the output shaft torque driving gear box assembly (20), the driving wheel (23) and the driven wheel (24) are meshed to drive the lead screw (31) to rotate, the lead screw nut (33) can only do linear retraction under radial limiting, the lead screw nut (33) drives the push rod (91) and the second-stage cylinder barrel (73) to retract, the second-stage cylinder barrel (73) drives the cylinder retracting movable pulley (61) to retract, the cylinder retracting movable pulley (61) drives the cylinder retracting steel rope (62) to transmit, and the cylinder retracting steel rope (62) pulls the third-stage cylinder barrel (83) to retract, so that load retraction is realized.

The particular embodiments described herein are illustrative only and are not limiting to the invention, as various modifications, additions and substitutions may be made to the above-described embodiments without departing from the spirit and scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides an adopt assembly pulley and single screw driven multistage electronic jar structure which characterized in that includes: gear box subassembly, lead screw subassembly, one-level cylinder subassembly, second grade cylinder subassembly, tertiary cylinder subassembly, push rod subassembly, stretch jar assembly pulley, motor that contracts, the gear box subassembly includes gear box, gear box lid, action wheel, follows driving wheel, lower journal stirrup, bearing frame, the lead screw subassembly includes lead screw, screw nut, base bearing, the one-level cylinder subassembly includes one-level cylinder, one-level end cover support ring, the second grade cylinder subassembly includes second grade cylinder flange, second grade cylinder flange support ring, second grade end cover, second grade end support ring, the tertiary cylinder subassembly includes tertiary cylinder flange, tertiary cylinder flange support ring, tertiary cylinder, goes up the journal stirrup, the push rod subassembly includes push rod, push rod flange support ring, stretch jar assembly pulley including stretching jar movable pulley, switching-over pulley, reverse pulley, The cylinder-extending fixed pulley and the cylinder-extending steel rope are arranged, the cylinder-extending pulley block comprises a cylinder-extending movable pulley, a cylinder-extending fixed pulley and a cylinder-extending steel rope, a lead screw and a lead screw nut form a lead screw pair to be installed on a push rod, the push rod is supported and installed in a third-stage cylinder barrel through a push rod flange support ring, the third-stage cylinder barrel is installed in a second-stage cylinder barrel, the second-stage cylinder barrel is installed in a first-stage cylinder barrel, the first-stage cylinder barrel is connected with a bearing seat and a gear box body through flanges, and a motor is connected with the input end of the gear box body.

2. The multi-stage electric cylinder structure driven by pulley block and single screw as claimed in claim 1, wherein the movable pulley of the cylinder-extending pulley block is mounted at the front end of the push rod, and is integrated with the screw nut and the push rod, the cylinder-extending fixed pulley is mounted on the bearing seat, and is integrated with the bearing seat and the cylinder barrel, the starting end of the cylinder-extending steel cable is at the center of the cylinder-extending movable pulley, and is wound around the cylinder-extending fixed pulley, and is fixed on the flange of the three-stage cylinder barrel.

3. The multi-stage electric cylinder structure driven by the pulley block and the single screw as claimed in claim 1, wherein the driving wheel of the cylinder-retracting pulley block is slidably mounted at the rear end of the second-stage cylinder barrel, integrated with the screw nut and the second-stage cylinder barrel, the cylinder-retracting stationary pulley is mounted inside the first-stage cylinder barrel, integrated with the bearing seat and the first-stage cylinder barrel, the cylinder-retracting steel cable is mounted at the center of the cylinder-retracting movable pulley, bypasses the cylinder-retracting stationary pulley, bypasses the cylinder-retracting movable pulley and is fixed on the flange of the third-stage cylinder barrel.

4. The multi-stage electric cylinder structure driven by the pulley block and the single screw as claimed in claim 1, wherein the inner wall of the cylinder barrel is provided with a key groove, and the mounting flange at the rear end of the third stage cylinder barrel is provided with a guide key sliding in the key groove of the cylinder barrel.

5. The multi-stage electric cylinder structure driven by the pulley block and the single screw as claimed in claim 1, wherein the motor is installed at the input end of the gear transmission pair to drive the driving wheel, and the driven wheel drives the screw to rotate.

6. The multi-stage electric cylinder structure driven by the pulley block and the single screw as claimed in claim 1, wherein the first stage cylinder end cover is connected with the first stage cylinder flange, the first stage cylinder end cover support ring is installed in the first stage cylinder end cover, and the second stage cylinder is supported in the circumferential direction to be linearly telescopic.

7. The multi-stage electric cylinder structure driven by the pulley block and the single screw as claimed in claim 1, wherein the secondary cylinder is flange-connected to the secondary cylinder end cap, the secondary cylinder end cap support ring is installed in the secondary cylinder end cap, and the circumferential support is used for telescoping the tertiary cylinder.