CN214331147U

CN214331147U - Axial locking device and piston rod assembly and oil cylinder with same

Info

Publication number: CN214331147U
Application number: CN202022812846.9U
Authority: CN
Inventors: 邱永宁; 王强强; 刘林帅; 袁飞
Original assignee: Jiangsu Hengli Hydraulic Co Ltd
Current assignee: Jiangsu Hengli Hydraulic Co Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-10-01
Anticipated expiration: 2030-11-30

Abstract

The utility model discloses an axial locking device, including circumference positioning disk and outer disk body, the ring gear has on the inboard of outer disk body, rotates on the circumference positioning disk and is connected with the plectrum, the front end and the ring gear contact of plectrum, circumference positioning disk and outer disk body in both relative unidirectional rotation in week, the lateral part of plectrum still is equipped with the elastic component, the elastic component lower extreme supports the circumference positioning disk to withstand the ring gear with the plectrum through elastic force, circumference positioning disk and first part fastening connection. A piston rod assembly is provided with the axial locking device. An oil cylinder is provided with the piston rod assembly. In this way, the utility model discloses axial locking device and have axial locking device's piston rod subassembly and hydro-cylinder can improve the convenience of operation, improve operating efficiency, have improved locking reliability, can play permanent locking effect under the prerequisite of spare part not breaking occur, conquassation.

Description

Axial locking device and piston rod assembly and oil cylinder with same

Technical Field

The utility model relates to a prevent changeing and prevent axial pine and take off the mechanism field, especially relate to an axial locking device and have this axial locking device's piston rod subassembly and hydro-cylinder.

Background

In modern society, mechanical devices are widely used in various fields of our daily lives, and threaded connections are indeed indispensable applications of machine manufacturing and mechanical devices thereof. The threaded connection firmly occupies various fields of mechanical manufacturing by the advantages of simple and efficient connection mode, compact structure, reliable connection and the like. However, the disadvantages of the threaded connection are also obvious, such as long-term use of the threaded connection piece, fatigue of the threads, increase of clearance of a threaded joint surface and the like, the comprehensive accumulation of the factors causes the loosening of the threads, especially in some occasions requiring the threads to be in a working state for a long time and in high risk, the requirement on the loosening prevention of the threads is very high, various loosening prevention measures are adopted in various fields at present, especially in an important working environment, the loosening prevention measures are not only required to be taken for the threads, but also the regular or irregular inspection is required to be carried out on the connection threads, and not only manpower and material resources are consumed, but also a certain danger coefficient is increased in the working environment. At present, the commonly used thread loosening measures are mainly the measures of thread gluing, thread tooth damage, part surface damage and the like. Taking the field of oil cylinders as an example, when the piston rod is connected with the piston, the thread locking is very important, the service cycle is required to be long, and meanwhile, good stability is required to be ensured under severe working conditions.

The existing screw thread anti-loosening measures can only be guaranteed to be effective within a certain period, and when the screw thread anti-loosening measures are used for a long time or under severe working conditions, the part for preventing the screw thread from loosening is fatigued, and the screw thread can be loosened. The anti-loosening effect is realized once, the threads or the metal surfaces can be damaged lightly or heavily, the attractiveness of parts is influenced lightly, the use performance of the parts is influenced heavily, and the reuse rate is reduced. Generally, the damage of the anti-loosening measures to the metal is only used for one-time anti-loosening, and the anti-loosening deformation surface or parts are required to be replaced when the anti-loosening measures are disassembled and assembled again. In contrast, the conventional anti-loosening measures require tedious manual judgment and monitoring and certain external force application, and are labor-consuming in general.

Disclosure of Invention

The utility model discloses the main technical problem who solves provides an axial locking device and has this axial locking device's piston rod subassembly and hydro-cylinder, can improve the convenience of operation, improves operating efficiency, has improved locking reliability, can play permanent locking effect under the prerequisite of spare part not fracture, conquassation.

In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides an axial locking device, including the circumference positioning disk and the outer disk body of coaxial setting, the ring gear has on the inboard of outer disk body, it is connected with the plectrum to rotate on the circumference positioning disk, the front end and the ring gear contact of plectrum, circumference positioning disk and outer disk body are both relative unidirectional rotation in circumference, the lateral part of plectrum still is equipped with the elastic component, the elastic component lower extreme supports the circumference positioning disk to withstand the ring gear through elastic force with the plectrum, circumference positioning disk and first part fastening connection, outer disk body and second part cooperation are connected, second part threaded connection is on first part, the screw thread pine of second part takes off turns to and relative unidirectional rotation opposite direction between circumference positioning disk and the outer disk body, makes outer disk body restriction second part take off from first part pine and take off.

In a preferred embodiment of the present invention, the pick and the elastic member are connected to the positioning plate by a first pin.

In a preferred embodiment of the present invention, the tail of the pick has a tooth-shaped structure, the positioning plate has a second pin, the second pin has a gear, the gear is engaged with the tooth-shaped structure of the pick, the pick and the positioning plate have a pin hole, and a pin is inserted into the pin hole to limit the rotation of the pick.

In a preferred embodiment of the present invention, the elastic members are disposed on the left and right sides of the pick.

In a preferred embodiment of the present invention, the positioning plate has an inwardly concave storage groove therein, the plectrum, the internal gear and the elastic member are located in the storage groove, and the positioning plate has mounting holes corresponding to the first pin and the second pin on its left and right end faces.

In a preferred embodiment of the present invention, the inner ring of the positioning disk is sleeved on the first member and is tightly connected with the first member through the groove and the boss structure.

In a preferred embodiment of the present invention, the left side of the outer tray body has a threaded section, and the left end of the outer tray body is threaded onto the second member.

In a preferred embodiment of the present invention, the outer disc body includes a fluted disc and a connecting disc, the fluted disc and the connecting disc are connected by a screw fastening, and the thread section is located at a protruding portion of a left end face of the connecting disc.

For solving the technical problem, the utility model discloses a another technical scheme is: the utility model provides a piston rod assembly, includes the piston rod and installs the piston on the piston rod, it has foretell axial locking device to install on the piston rod assembly, the rear end threaded connection of piston rod has the nut, the nut is located the rear end of piston to the inside internal thread section that has of nut, the rear end of piston rod has the recess, axial locking device's outer disk body left end and internal thread section threaded connection and both terminal surfaces laminating, the inner circle of circumference positioning disk have with recess complex convex structure, the circumference positioning disk passes through the piston rod and fixes to make it not rotate, the nut rotates and transmits to outer disk body to rotate with the restriction nut through outer disk body lock nut.

For solving the technical problem, the utility model discloses a another technical scheme is: an oil cylinder is provided, which comprises a cylinder body, and the piston rod assembly in the cylinder body.

The utility model has the advantages that: the utility model discloses axial locking device and have this axial locking device's piston rod subassembly and hydro-cylinder, can improve the convenience of operation, improve operating efficiency, improved locking reliability, can play permanent locking effect under the prerequisite of spare part not fracture, conquassation.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

FIG. 1 is a schematic structural view of a preferred embodiment of the axial locking device of the present invention;

FIG. 2 is a partial cross-sectional view of the left side view of FIG. 1;

FIG. 3 is an exploded view of FIG. 1;

FIG. 4 is a schematic view of the axial locking device according to the present invention illustrating a local force analysis;

FIG. 5 is a partial schematic view of the piston rod assembly;

FIG. 6 is a schematic view of a partial structure of the cylinder;

the parts in the drawings are numbered as follows: 1. The gear comprises a circumferential positioning disc, 2, an outer disc body, 3, an inner gear ring, 4, a shifting piece, 5, an elastic piece, 6, a first pin shaft, 7, a tooth-shaped structure, 8, a second pin shaft, 9, a gear, 10, a pin hole, 11, a containing groove, 12, a threaded section, 13, a gear disc, 14, a connecting disc, 15, a piston rod, 16, a piston, 17, a nut, 18, a groove, 19, a boss, 20, a cylinder body, 21, an inner threaded section, 22 and a screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 to 3, an axial locking device includes a circumferential positioning plate 1 and an outer plate 2 which are coaxially arranged, an inner gear ring 3 is arranged on the inner side of the outer plate 2, a shifting piece 4 is rotatably connected to the circumferential positioning plate 1, the front end of the shifting piece 4 is in contact with the inner gear ring 3, the circumferential positioning plate 1 and the outer plate 2 relatively rotate in a single direction in the circumferential direction, an elastic piece 5 is further arranged on the side portion of the shifting piece 4, the lower end of the elastic piece 5 abuts against the circumferential positioning plate 1, the shifting piece 4 abuts against the inner gear ring 3 through elastic force, the circumferential positioning plate 1 is fixedly connected with a first component, the outer plate 2 is connected with a second component in a matching manner, the second component is in threaded connection with the first component, and the loosening direction of the threads of the second component is opposite to the relative single-direction rotation direction between the circumferential positioning plate 1 and the outer plate 2, so that the outer plate 2 limits the second component from loosening from the first component. The components such as the plectrum, the gear that set up in circumference positioning disk 1 can be a plurality ofly, rationally selects its quantity and the position of setting according to actual need.

In addition, the plectrum 4 and the elastic element 5 are connected on the circumferential positioning plate 1 through a first pin shaft 6.

In addition, the tail of the shifting piece 4 is provided with a toothed structure 7, a second pin shaft 8 is installed on the circumferential positioning plate 1, a gear 9 is installed on the second pin shaft 8 in a matched mode, the gear 9 is meshed with the toothed structure 7 of the shifting piece 4, pin holes 10 are further designed on the shifting piece 4 and the circumferential positioning plate 1, and pins are inserted into the pin holes 10 to limit the rebound of the shifting piece 4.

In addition, elastic members 5 are provided on both left and right sides of the paddle 4.

In addition, an inwards concave containing groove 11 is formed in the circumferential positioning disk 1, the shifting sheet 4, the inner gear 7 and the elastic piece are all located in the containing groove 11, and mounting holes (not marked in the figure) corresponding to the first pin shaft 6 and the second pin shaft 8 are formed in the left end face and the right end face of the circumferential positioning disk 1.

In addition, the inner ring of the circumferential positioning disk 1 is sleeved on the first component, and the circumferential positioning disk and the first component are fixedly connected through a groove and a boss structure.

In addition, the left side of the outer disc body is provided with a threaded section 12, and the left end of the outer disc body is in threaded connection with the second component.

In addition, the outer disc body comprises a fluted disc 13 and a connecting disc 14, the fluted disc and the connecting disc are fixedly connected through a screw 22, and the thread section is located on a protruding portion of the left end face of the connecting disc.

As shown in fig. 5, a piston rod assembly comprises a piston rod 15 and a piston 16 mounted on the piston rod, wherein an axial locking device as described above is mounted on the piston rod assembly, a nut 17 is connected to the rear end of the piston rod 15 through a thread, the nut 17 is located at the rear end of the piston 16, an internal thread section 21 is arranged inside the nut 17, a groove 18 is formed in the rear end of the piston rod 16, the left end of an outer disc body of the axial locking device is connected to the internal thread section 21 through a thread, the left end and the end face of the outer disc body are attached to each other, a boss 19 structure matched with the groove 18 is formed in the inner ring of a circumferential positioning disc 1, the circumferential positioning disc 1 is fixed through the piston rod 1 so as not to rotate, the rotation of the nut 17 is transmitted to an outer disc body 2, and the nut 17 is locked through the outer disc body 2 so as to limit the rotation of the nut 17. The boss 19 may be disposed on the piston rod 15, and the groove 18 may be disposed on the positioning disk 1, as long as the two are tightly connected, and the tight connection may also be implemented by using other forms or structures of connection.

Referring to fig. 6, a cylinder includes a cylinder body 20 in which the piston rod assembly is described above.

The end face of the piston rod 15 is provided with a section of groove 18, the circumferential positioning disk 1 is provided with a boss 19 matched with the groove 18 on the end face of the piston rod 15, and the boss 19 is clamped in the groove 18 on the end face of the piston rod 15 to ensure that the circumferential positioning disk 1 cannot rotate along the circumferential direction of the piston rod 15.

Firstly, after the plectrum 4, the elastic piece 5, the first pin shaft 6, the second pin shaft 8 (inner hexagonal sunk groove pin shaft) and the gear 9 are arranged in the circumferential positioning disk 1, the circumferential positioning disk 1 is embedded into the fluted disc 13, the plectrum 5 is stirred in the process to be smoothly arranged in the circumferential positioning disk, then the connecting disk 14 is covered, the screw is screwed on, and the circumferential positioning disk 1, the plectrum 4, the pin shaft 6 and the pin shaft 8 on the circumferential positioning disk are sealed between the connecting disk 14 and the fluted disc 13, so that the whole device is integrated into a whole, and the use and the operation are more flexible. In addition, two steps positioned by the connecting disc 14 are matched with the circumferential positioning disc 1 to ensure better rotation coaxiality (note that the matching at the position should ensure higher finish degree), at the moment, the fluted disc 13 and the connecting disc 14 can rotate circumferentially relative to the circumferential positioning disc, namely, the outer ring can rotate circumferentially in a single direction relative to the inner ring in the whole device.

The plectrum 4, the fluted disc 13 and the elastic piece 5 use the characteristics of a ratchet mechanism for reference, in the normal working process, the plectrum 4 is attached to the inner gear ring 3 of the fluted disc 13 under the elastic force action of the elastic piece 5, when the fluted disc 13 rotates in the positive direction (note: the circumferential positioning disc 1 is clamped in the key groove on the end face of the piston rod and cannot rotate at the moment), the plectrum 4 is normally pushed away by the inner gear ring 3 and rotates smoothly, and when the fluted disc 13 rotates in the reverse direction, the fluted disc 1 is clamped under the matching action of the plectrum 4 and the elastic piece 5, so that the anti-loosening effect is achieved. In the above constitution, the gear 9 is in a relaxed rotatable state, and the gear 9 functions as: when the device needs to be detached from the piston rod 15, the second pin shaft 8 is rotated by an external hexagonal wrench, the second pin shaft 8 drives the gear 9 to rotate (note: the second pin shaft 8 is matched with the inner hole of the gear 9 through a D-shaped shaft), and the gear 9 drives the pull piece 4 to rotate, so that the pull piece 4 is separated from the inner gear ring 3 of the fluted disc 13.

As shown in fig. 4, during the operation of the related part, the following four points are required to be ensured:

guarantee point 1: as shown in fig. 2, a material point on the teeth on the internal gear ring 3 is subjected to force analysis, under the condition that the locking reliability is ensured, the force generated at the material point by the reverse rotation of the toothed disc 13 is F, and the force F can be decomposed into a force F1 along the sliding trend of the contact surface of the pulling piece and a supporting force F2 of the contact surface of the pulling piece, so that under the condition that the locking reliability is ensured, the toothed disc 13 is forced to reverse the force F generated on the teeth, the pulling piece 4 cannot slide out of the toothed groove, and then:

- (formula 1);

in the formula

The force generated by the elastic element 5 at the contact of the pick with the teeth of the toothed disc 13;

the friction force is generated at the contact part of the plectrum 4 and the teeth of the fluted disc 13;

formula 2, wherein

Is the static friction factor.

The joint type 1 and the formula 2 can be judged

The maximum angle of (c).

Guarantee point 2: in the case of guarantee point 1 satisfaction, it is also necessary to satisfy

Therefore, the pulling plate 4 can be ensured to smoothly enter and exit from the tooth groove of the gear plate 13.

Guarantee point 3: under the condition that the

guarantee points

1 and 2 are met and the strength of each material is met, the material of the shifting piece 4 is higher than the strength of the material of the fluted disc 13, and at least the two materials are guaranteed to be equal, so that the situation that the shifting piece 4 is seriously abraded by the teeth of the fluted disc 13 to be clamped into the tooth grooves in the working engineering can be avoided, and inconvenience is brought to disassembly.

Guarantee point 4: under the condition of ensuring the strength, the tooth number of the inner gear ring 3 is increased as much as possible, so that the locking stability and the anti-loosening precision can be improved.

The requirement for the above 4 points is met, the working stability of the shifting piece can be guaranteed to a certain degree, and meanwhile the service performance, the frequency and the service life of the whole device are improved.

Additionally, the utility model discloses it just can weaken the screw thread loosening power to compare in other locking device a significant advantage, because connection pad 14 stops nut 17 at the faying face top, so 17 loosening will overcome at first just be close the frictional force that the pretightning force that adds for the screw thread at first, still need to make whole locking device circumferential direction in addition simultaneously, and locking device has blocked in circumference and has died, so this locking effect that has obviously improved the device.

The assembly process is as follows: firstly, a nut 17 is screwed, a screwing torque is added, then a boss 19 of a circumferential positioning disk 1 of the anti-loosening device is aligned with a groove 18 on a piston rod 15 and is assembled to clamp the circumferential positioning disk 1 to ensure that the circumferential positioning disk 1 cannot circumferentially rotate, a fluted disc 13 is positively rotated, a connecting disk 14 is driven by the fluted disc 13 to circumferentially rotate (note: at the moment, the circumferential positioning disk 1 is fixed in the groove 18 of the piston rod because the boss 19 of the circumferential positioning disk 1 is clamped in the groove 18 of the piston rod in the circumferential direction), a thread section 12 on the connecting disk 14 is screwed with an inner thread section 21 on the nut, meanwhile, the circumferential positioning disk 1 is driven by the fluted disc 13 and the connecting disk 14 to axially move until the connecting disk 14 is tightly attached to the end face of the nut 17, and the assembling process of the anti-loosening device is completed.

The disassembly process is as follows: when the anti-loosening device needs to be disassembled, firstly, an inner hexagonal wrench is externally inserted into an inner hexagonal groove at one end of the second pin shaft 8 to enable the second pin shaft to rotate, at the moment, the driving gear 9 rotates and drives the shifting piece 4 to swing, the shifting piece 4 is separated from the inner gear ring 3 of the fluted disc 13, when the pin hole 10 is aligned with the pin hole 10 on the circumferential positioning disc 1, the pin is put in, at the moment, the shifting piece 4 does not rebound, the fluted disc 13 is rotated by a tool, and the anti-loosening device can be disassembled after the screw thread is withdrawn.

The utility model discloses axial locking device easy dismounting, the simple operation, the integrated level is high, uses simple and convenient dexterity, and this utility model device is integrated integrative, and all screws and round pin axle all just block in each spare part inside it on it after this device assembly, so all screws and round pin axle all do not have the condition that the pine takes off, falls out. The anti-loosening device has the advantages that the permanent anti-loosening effect is achieved, the anti-loosening device is not loosened without being detached through external force, the anti-loosening device has a quick-change function, and the anti-loosening device is quite convenient to detach and replace under the condition that parts are not invalid. Can be used repeatedly without causing any damage to the thread and the parts themselves. The nut is axially jacked, the effect of reducing the pretightening force by axial positioning is achieved by slowly unloading the pretightening force in the using process of the part, and the anti-loosening effect is more obvious. The locking device not only can be used for locking the piston nut of the oil cylinder, but also can be used for other mechanical industries with similar structures, and has wide application.

Be different from prior art, the utility model discloses axial locking device and have this axial locking device's piston rod subassembly and hydro-cylinder can improve the convenience of operation, improve operating efficiency, have improved locking reliability, can play permanent locking effect under the prerequisite that spare part does not break off, conquassation.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, all included in the same way in the patent protection scope of the present invention.

Claims

1. The utility model provides an axial locking device, its characterized in that, including the circumference positioning disk and the outer disk body of coaxial setting, the ring gear has on the inboard of outer disk body, it is connected with the plectrum to rotate on the circumference positioning disk, the front end and the ring gear contact of plectrum, circumference positioning disk and outer disk body are in both relative unidirectional rotation in circumference, the lateral part of plectrum still is equipped with the elastic component, the elastic component lower extreme supports the circumference positioning disk to withstand the ring gear through elastic force with the plectrum, circumference positioning disk and first part fastening connection, outer disk body is connected with the cooperation of second part, second part threaded connection is on first part, the screw thread pine of second part takes off turns to and takes off with the relative unidirectional rotation opposite direction between circumference positioning disk and the outer disk body, makes outer disk body restriction second part pine take off from first part.

2. The axial locking device of claim 1, wherein the paddle and the resilient member are coupled to the circumferential positioning plate by a first pin.

3. The axial locking device of claim 2, wherein the tail of the pulling plate is provided with a toothed structure, the circumferential positioning plate is provided with a second pin shaft, the second pin shaft is provided with a gear in a matching manner, the gear is meshed with the toothed structure of the pulling plate, the pulling plate and the circumferential positioning plate are further provided with pin holes, and pins are inserted into the pin holes to limit the rebounding of the pulling plate.

4. The axial locking device of claim 3, wherein the resilient member is disposed on both left and right sides of the pick.

5. The axial locking device according to any one of claims 1 to 4, wherein the circumferential positioning plate is provided with an inward-concave containing groove therein, the plectrum, the internal gear and the elastic member are all located in the containing groove, and mounting holes corresponding to the first pin shaft and the second pin shaft are formed on the left end surface and the right end surface of the circumferential positioning plate.

6. The axial locking device of claim 5, wherein the inner race of the circumferential positioning disk is disposed over the first member and is securely coupled thereto by a groove and boss arrangement.

7. The axial locking device of claim 6 wherein the left side of the outer disc has a threaded section and the left end of the outer disc is threaded onto the second component.

8. The axial locking device of claim 7, wherein the outer disc body comprises a fluted disc and a connecting disc, the fluted disc and the connecting disc are fixedly connected through a screw, and the thread section is located at a protruding part on the left end face of the connecting disc.

9. A piston rod assembly comprises a piston rod and a piston arranged on the piston rod, and is characterized in that the axial locking device as claimed in any one of claims 1 to 8 is arranged on the piston rod assembly, a nut is connected to the rear end of the piston rod in a threaded manner and is located at the rear end of the piston, an internal thread section is arranged inside the nut, a groove is formed in the rear end of the piston rod, the left end of an outer disk body of the axial locking device is connected with the internal thread section in a threaded manner, the left end of the outer disk body and the internal thread section are attached to the end faces of the outer disk body and the end faces of the inner disk body and are attached to each other, a boss structure matched with the groove is arranged on an inner ring of a circumferential positioning disk, the circumferential positioning disk is fixed through the piston rod to enable the circumferential positioning disk body not to rotate, and the nut is transmitted to the outer disk body through the locking nut to limit the rotation of the nut.

10. A cylinder comprising a cylinder body having mounted therein a piston rod assembly as claimed in claim 9.