CN214331041U

CN214331041U - Hydraulic swing cylinder

Info

Publication number: CN214331041U
Application number: CN202120346350.9U
Authority: CN
Inventors: 李文钧
Original assignee: Ji'nan Boer Power Equipment Co ltd
Current assignee: Ji'nan Boer Power Equipment Co ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2021-10-01
Anticipated expiration: 2031-02-05

Abstract

The utility model relates to a hydraulic swing jar belongs to machine parts's technical field, it includes drive nut, drive screw and output shaft, drive nut is along drive screw's axial displacement, and drive nut's one end and drive screw threaded connection, the last screw lead angle of rise of drive screw is more than or equal to equivalent friction angle, drive screw and output shaft coaxial coupling, the one end that drive screw was kept away from to the output shaft can be connected with by the driving medium, the one end transmission that drive nut kept away from the output shaft is connected with the driving piece that is used for driving drive nut to remove. This application has the effect that reduces the transmission noise.

Description

Hydraulic swing cylinder

Technical Field

The application relates to the field of mechanical accessories, in particular to a hydraulic swing cylinder.

Background

The hydraulic swing mechanism is a mechanical fitting which is assembled tightly, can convert linear motion into rotary motion, and is widely applied to the assembly structures of mechanical arms, robots and the like.

In the related art, chinese utility model patent with publication number CN2466410 discloses a hydraulic swing motor, which comprises a housing, two parallel oil cylinders are arranged in the housing, two plungers with racks are arranged in the oil cylinders, a gear shaft is arranged between the two parallel oil cylinders in the direction perpendicular to the oil cylinders, and the teeth of a gear of the gear shaft are meshed with the racks on the plungers. The shaft heads of the gear shafts can be connected with the driven piece in parallel through the rocker arms. When the hydraulic swing motor is used, the oil cylinder is started to operate, the plunger moves, and the rack is meshed with the gear teeth of the gear shaft, so that the gear shaft is driven to rotate, and the driven part is driven to rotate.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: the gear rack is meshed with the gear teeth on the gear shaft, so that linear motion is converted into rotary motion, and high transmission noise is achieved.

SUMMERY OF THE UTILITY MODEL

In order to reduce the transmission noise, the present application provides a hydraulic swing cylinder.

The application provides a hydraulic swing cylinder adopts following technical scheme:

the hydraulic swing cylinder comprises a transmission nut, a transmission screw rod and an output shaft, wherein the transmission nut moves along the axial direction of the transmission screw rod, one end of the transmission nut is in threaded connection with the transmission screw rod, a thread lead angle on the transmission screw rod is larger than or equal to an equivalent friction angle, the transmission screw rod is in coaxial connection with the output shaft, one end, far away from the transmission screw rod, of the output shaft is connectable with a driven piece, and one end, far away from the output shaft, of the transmission nut is in transmission connection with a driving piece used for driving the transmission nut to move.

Through adopting above-mentioned technical scheme, start the driving piece, drive nut removes, can drive the drive screw and rotate to drive the output shaft and rotate, in order to realize being rotated by the rotation of driving medium, owing to adopt drive nut to drive screw pivoted mode, turn into rotary motion with linear motion, reduced the transmission noise.

Optionally, the hydraulic swing cylinder further comprises a housing, the housing covers the transmission nut and the transmission screw rod, the transmission nut is connected with the inner wall of the housing in a sliding mode, and the sliding direction is the axial direction of the transmission screw rod.

By adopting the technical scheme, the shell is covered outside the transmission nut and the transmission screw rod, so that the transmission noise is further reduced, the external dust can be reduced to enter the connecting structure of each part, the influence of the dust on the transmission effect of each part is reduced, and the service life of the hydraulic swing cylinder is prolonged; meanwhile, the inner wall of the shell is connected with the transmission nut in a sliding mode along the axial direction of the transmission lead screw, a certain guiding effect is achieved for the transmission nut, the probability of rotation of the transmission nut can be reduced to a large extent, the transmission nut is driven by the driving piece to slide, and the driving effect of rotation of the transmission lead screw is achieved.

Optionally, a limited rotation groove is formed in one side, close to the inner wall of the shell, of the transmission nut along the axial direction of the transmission screw rod, a limited rotation piece is arranged on the shell, and the limited rotation piece is connected with the side wall of the limited rotation groove in a sliding mode.

Through adopting above-mentioned technical scheme, the limit commentaries on classics piece slides with the lateral wall in limit commentaries on classics groove and is connected the slip that has realized drive nut and shell and be connected, when drive nut slided, because the limit changes the restriction of the lateral wall in piece and limit commentaries on classics groove, drive nut pivoted probability has been reduced to a great extent.

Optionally, the driving part is a reciprocating hydraulic cylinder, a piston rod of the reciprocating hydraulic cylinder is in threaded connection with the transmission nut, and a cylinder body of the reciprocating hydraulic cylinder is connected with the shell.

By adopting the technical scheme, the reciprocating hydraulic cylinder is arranged as the driving piece, the cylinder body of the reciprocating hydraulic cylinder is connected with the shell, the stability of the hydraulic oscillating cylinder when the reciprocating hydraulic cylinder is started is improved, the piston rod of the reciprocating hydraulic cylinder is in threaded connection with the transmission nut, so that the transmission nut can be driven to move when the piston rod moves, and meanwhile, the reciprocating hydraulic cylinder and the transmission nut are convenient to install and detach.

Optionally, a piston rod of the reciprocating hydraulic cylinder is further in threaded connection with a locking nut, the screwing direction of the piston rod of the reciprocating hydraulic cylinder and the threaded connection of the locking nut is opposite to the screwing direction of the piston rod of the reciprocating hydraulic cylinder and the threaded connection of the transmission nut, and the locking nut and the transmission nut are abutted to one side, close to the cylinder body of the reciprocating hydraulic cylinder, of the transmission nut.

Through adopting above-mentioned technical scheme, set up lock nut, and the piston rod of reciprocating hydraulic cylinder and lock nut threaded connection's the soon to opposite with piston rod and the transmission nut threaded connection's of reciprocating hydraulic cylinder soon, when lock nut and transmission nut butt, improved reciprocating hydraulic cylinder's piston rod and transmission nut's fastening effect to the probability of the mutual rotation condition appears after having reduced the two fastening again.

Optionally, the transmission screw is coaxially connected with the output shaft through a bearing, the output shaft is in threaded connection with a fastening nut, and the fastening nut is abutted to an inner ring of the bearing.

Through adopting above-mentioned technical scheme, the setting of bearing has realized being connected of drive screw and output shaft, and fastening nut's setting has reduced the condition that the bearing takes place to slide along the axial of output shaft, has improved the tightness of being connected of bearing and output shaft.

Optionally, an abutting portion is arranged on the inner wall of the housing, one end, close to the transmission lead screw, of the outer ring of the bearing abuts against the abutting portion, an end cover is arranged on one side, close to the output shaft, of the housing, and the end cover is sleeved on the output shaft and abuts against one end, far away from the transmission lead screw, of the outer ring of the bearing.

Through adopting above-mentioned technical scheme, the one end butt that butt portion and the outer lane of bearing are close to drive screw, and drive screw's one end butt is kept away from with the outer lane of bearing to the end cover, has further reduced the condition that the bearing takes place to slide along the axial of output shaft, has improved the bearing and has been connected the compactness with drive screw, output shaft.

Optionally, an oil filling hole for injecting lubricating oil is formed in the shell, and an oil plug for plugging the oil filling hole is further arranged on the shell.

Through adopting above-mentioned technical scheme, the staff of being convenient for of setting up of oil filler point pours into lubricating oil into to the shell into to improve the transmission smoothness nature between each part, reduce the wearing and tearing condition of each part, thereby further reduce transmission noise, after having annotated lubricating oil, can use the oil plug shutoff oil filler point, reduce the leakage of lubricating oil.

Optionally, an oil seal for reducing leakage of lubricating oil is arranged on the end cover, and the oil seal is abutted to the output shaft.

Through adopting above-mentioned technical scheme, the setting up of oil blanket has reduced the condition that lubricating oil leaked from the space between shell and the output shaft to the pollution condition of lubricating oil to driven spare has been reduced.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the linear motion is converted into the rotary motion by adopting a mode that the transmission nut drives the transmission screw rod to rotate, so that the transmission noise is reduced;

2. the rotation limiting piece is connected with the side wall of the rotation limiting groove in a sliding mode, so that the transmission nut is connected with the shell in a sliding mode, and when the transmission nut slides, the rotation limiting piece is limited by the side wall of the rotation limiting groove, so that the rotation probability of the transmission nut is reduced to a large extent;

3. the setting of oil filler point is convenient for the staff to pour into lubricating oil into in the shell to improve the transmission smoothness nature between each part, reduce the wearing and tearing condition of each part, thereby further reduce transmission noise.

Drawings

FIG. 1 is a schematic view of the overall structure of a hydraulic swing cylinder according to an embodiment of the present application;

fig. 2 is an enlarged schematic view of a portion a of fig. 1.

Description of reference numerals: 100. a drive nut; 110. a rotation limiting groove; 200. a drive screw; 300. an output shaft; 310. fastening a nut; 400. a reciprocating hydraulic cylinder; 410. a lock nut; 500. a housing; 510. a rotation limiting bolt; 520. an abutting portion; 530. an oil filler hole; 540. an oil plug; 600. a bearing; 700. a space ring; 800. an end cap; 810. and (7) oil sealing.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses a hydraulic swing cylinder. Referring to fig. 1, the hydraulic swing cylinder includes a housing 500 and a driving nut 100, one end of the driving nut 100 is connected with a driving screw 200 in a threaded manner, a lead angle of the driving screw 200 is greater than or equal to an equivalent friction angle, and the driving nut 100 is connected with an inner wall of the housing 500 in a sliding manner along an axial direction of the driving screw 200. One end of the transmission nut 100 far away from the transmission screw 200 is connected with a driving member in a transmission manner to drive the transmission nut 100 to slide. An output shaft 300 is coaxially connected to an end of the driving screw 200 away from the driving member, and an end of the output shaft 300 away from the driving screw 200 is connectable to the driven member to drive the driven member to rotate.

The driving member is a reciprocating hydraulic cylinder 400, and a piston rod of the reciprocating hydraulic cylinder 400 is in threaded connection with one end of the transmission nut 100 far away from the transmission screw rod 200. The housing 500 is covered outside the driving nut 100 and the driving screw 200, and the cylinder body of the reciprocating hydraulic cylinder 400 is connected with one end of the housing 500 through a bolt, so that the reciprocating hydraulic cylinder 400 can be disassembled and assembled.

The piston rod of the reciprocating hydraulic cylinder 400 is further connected with a locking nut 410 in a threaded manner, and the locking nut 410 is abutted against one side of the transmission nut 100 close to the cylinder body of the reciprocating hydraulic cylinder 400 so as to improve the fastening effect of the piston rod of the reciprocating hydraulic cylinder 400 and the transmission nut 100. And the screwing direction of the threaded connection of the piston rod and the locking nut 410 is opposite to that of the threaded connection of the piston rod and the transmission nut 100, so that the probability of mutual rotation generated after the piston rod and the transmission nut 100 are tightly connected is reduced.

The side, close to the inner wall of the shell 500, of the transmission nut 100 is provided with the rotation limiting groove 110, the opening direction of the rotation limiting groove 110 is consistent with the axial direction of the transmission screw rod 200, the shell 500 is provided with the rotation limiting piece, and the rotation limiting piece is connected with the side wall of the rotation limiting groove 110 in a sliding mode, so that the sliding connection between the transmission nut 100 and the shell 500 is achieved, and meanwhile, the rotating condition of the transmission nut 100 when sliding is reduced.

In this embodiment, the rotation limiting member is a rotation limiting bolt 510, and the rotation limiting bolt 510 is in threaded connection with the housing 500, so that the rotation limiting bolt 510 can be conveniently detached and installed, and the transmission nut 100 and the housing 500 can be conveniently detached and installed.

In order to reduce the mechanical wear among the components, lubricating oil needs to be injected among the components, so that the oil filling hole 530 is formed in the shell 500, a worker can conveniently inject the lubricating oil among the components in the shell 500, and the oil plug 540 is further inserted into the oil filling hole 530 so as to plug the oil filling hole 530 and reduce the leakage of the lubricating oil.

Referring to fig. 1 and 2, one end of the drive screw 200, which is far away from the reciprocating hydraulic cylinder 400, is coaxially connected with the output shaft 300 through a bearing 600, in this embodiment, two bearings 600 are provided, and the arrangement of the two bearings 600 can improve the connection tightness between the drive screw 200 and the output shaft 300 to a greater extent. And a space ring 700 is clamped between the inner rings of the two bearings 600 to reduce the abrasion between the two bearings 600.

An abutting portion 520 is integrally formed on the inner wall of the housing 500, and the outer ring of the bearing 600 near one end of the drive screw 200 abuts against the abutting portion 520. An end cover 800 is inserted into one side of the housing 500 close to the output shaft 300, the end cover 800 is sleeved on the output shaft 300, and the end cover 800 can be abutted against the outer ring of the bearing 600 far away from one end of the transmission screw 200. The end cover 800 and the abutting portion 520 reduce the movement of the bearing 600 in the axial direction of the drive screw 200 when the hydraulic swing cylinder is in use.

The output shaft 300 is further connected with two fastening nuts 310 in a threaded manner, in the embodiment, the two fastening nuts 310 are coaxially and tightly arranged, and the fastening nut 310 close to the transmission screw rod 200 is abutted to the inner ring of the bearing 600 far away from the transmission screw rod 200, so that the movement of the bearing 600 is further reduced.

The end cover 800 is provided with a clamping groove along the circumferential direction, an oil seal 810 is clamped in the clamping groove, and the oil seal 810 is abutted to the output shaft 300 so as to reduce the leakage of lubricating oil.

The implementation principle of the hydraulic swing cylinder in the embodiment of the application is as follows: when the worker installs the hydraulic swing cylinder, the drive nut 100 is first screwed to the drive screw 200, and then the piston rod of the reciprocating hydraulic cylinder 400 is screwed to the end of the drive nut 100 away from the drive screw 200. Then, the lock nut 410 is screwed to make the lock nut 410 abut against the drive nut 100, then the drive nut 100 and the drive screw 200 are placed in the housing 500, the rotation limiting bolt 510 is installed to make the rotation limiting bolt 510 placed in the rotation limiting groove 110, and then the cylinder body of the reciprocating hydraulic cylinder 400 is bolted to the housing 500.

The drive screw 200 and the output shaft 300 are connected by two bearings 600 at one end of the housing 500 remote from the reciprocating hydraulic cylinder 400, a spacer 700 is placed between the two bearings 600, and the bearing 600 near the drive screw 200 abuts on the abutting portion 520. Then, the two fastening nuts 310 are screwed so that the fastening nut 310 close to the drive screw 200 abuts against the inner ring of the bearing 600 far from the drive screw 200. And then the end cover 800 is inserted, so that the end cover 800 is abutted with the outer ring of the bearing 600 far away from the transmission screw rod 200, the oil seal 810 on the end cover 800 is abutted with the output shaft 300, the installation of the hydraulic swing cylinder can be completed, and the output shaft 300 is connected with a driven member, so that the hydraulic swing cylinder can be used.

When the hydraulic swing cylinder is used, the reciprocating hydraulic cylinder 400 is started, the piston rod drives the transmission nut 100 to slide, the transmission lead screw 200 is driven to rotate, the output shaft 300 is driven to rotate, and then the driven part rotates.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A hydraulic swing cylinder characterized by: the transmission nut (100) moves along the axial direction of the transmission screw (200), one end of the transmission nut (100) is in threaded connection with the transmission screw (200), a thread lead angle on the transmission screw (200) is larger than or equal to an equivalent friction angle, the transmission screw (200) is in coaxial connection with the output shaft (300), one end, far away from the transmission screw (200), of the output shaft (300) is connectable with a transmitted piece, and one end, far away from the output shaft (300), of the transmission nut (100) is in transmission connection with a driving piece used for driving the transmission nut (100) to move.

2. A hydraulic swing cylinder as defined in claim 1 wherein: the hydraulic swing cylinder further comprises a shell (500), the shell (500) covers the transmission nut (100) and the transmission screw rod (200), the transmission nut (100) is connected with the inner wall of the shell (500) in a sliding mode, and the sliding direction is the axial direction of the transmission screw rod (200).

3. A hydraulic swing cylinder according to claim 2, characterized in that: one side, close to the inner wall of the shell (500), of the transmission nut (100) is provided with a rotation limiting groove (110) along the axial direction of the transmission lead screw (200), the shell (500) is provided with a rotation limiting piece, and the rotation limiting piece is connected with the side wall of the rotation limiting groove (110) in a sliding mode.

4. A hydraulic swing cylinder as defined in claim 1 wherein: the driving piece is a reciprocating hydraulic cylinder (400), a piston rod of the reciprocating hydraulic cylinder (400) is in threaded connection with the transmission nut (100), and a cylinder body of the reciprocating hydraulic cylinder (400) is connected with the shell (500).

5. A hydraulic swing cylinder according to claim 4, characterized in that: the piston rod of the reciprocating hydraulic cylinder (400) is further connected with a locking nut (410) in a threaded mode, the screwing direction of the piston rod of the reciprocating hydraulic cylinder (400) and the screwing direction of the locking nut (410) in the threaded mode is opposite to the screwing direction of the piston rod of the reciprocating hydraulic cylinder (400) and the screwing direction of the transmission nut (100) in the threaded mode, and the locking nut (410) is abutted to one side, close to the cylinder body of the reciprocating hydraulic cylinder (400), of the transmission nut (100).

6. A hydraulic swing cylinder according to claim 2, characterized in that: the transmission screw rod (200) is coaxially connected with the output shaft (300) through a bearing (600), a fastening nut (310) is connected to the output shaft (300) in a threaded mode, and the fastening nut (310) is abutted to an inner ring of the bearing (600).

7. A hydraulic swing cylinder according to claim 6, characterized in that: the inner wall of the shell (500) is provided with a butting part (520), one end, close to the transmission screw (200), of the outer ring of the bearing (600) is butted with the butting part (520), one side, close to the output shaft (300), of the shell (500) is provided with an end cover (800), the end cover (800) is sleeved on the output shaft (300) and is butted with one end, far away from the transmission screw (200), of the outer ring of the bearing (600).

8. A hydraulic swing cylinder as defined in claim 7 wherein: an oil filling hole (530) used for injecting lubricating oil is formed in the shell (500), and an oil plug (540) used for plugging the oil filling hole (530) is further arranged on the shell (500).

9. A hydraulic swing cylinder as defined in claim 8 wherein: an oil seal (810) used for reducing lubricating oil leakage is arranged on the end cover (800), and the oil seal (810) is abutted to the output shaft (300).