CN220850207U - Oil cylinder with adjustable installation distance - Google Patents

Abstract

The utility model relates to the technical field of oil cylinders, in particular to an oil cylinder with an adjustable installation distance, which comprises: the oil cylinder comprises an oil cylinder main body, wherein a first earring and a second earring are fixed at one end of the oil cylinder main body; one end of the eccentric pin shaft is arranged in the first ear ring, and the other end of the eccentric pin shaft is arranged in the second ear ring; the locking plate is arranged on one side, far away from the second earring, of the first earring and is detachably connected with the first earring, and the locking plate is connected with the eccentric pin shaft; the joint bearing is arranged between the first earring and the second earring, and the eccentric pin shaft is inserted into the joint bearing; the connecting piece is arranged between the first earring and the second earring, and the connecting piece is sleeved outside the knuckle bearing. According to the oil cylinder with the adjustable installation distance, the installation distance between the oil cylinder main body and a load is adjusted by using the eccentric pin shaft, so that the problem that the traditional thread adjustment is easy to fatigue damage is solved; in addition, the adjustment mode is very convenient, and the work efficiency is improved.

Description

Oil cylinder with adjustable installation distance

Technical Field

The utility model relates to the technical field of oil cylinders, in particular to an oil cylinder with an adjustable installation distance.

Background

The oil cylinder is used as an executive component of the whole hydraulic equipment, and the requirement that the installation size needs to be adjusted is frequently met in the use process, for example, the initial design size of a structural part deviates for some reasons, so that the installation size is slightly smaller than the minimum installation size of the oil cylinder; in addition, for example, the oil cylinder is worn or corroded for a long time, so that the extension length of the oil cylinder cannot reach an expected design value due to the micro-wear of the installation shaft hole, and the replacement on site is difficult or is based on the optimal economic consideration; or other working condition requirements requiring on-site fine adjustment of the mounting distance. These conditions require that the mounting distance of the cylinder be designed to be of a fine-adjustable structure.

The conventional solution for the oil cylinder with fine adjustment of the installation distance of the pin shafts at two ends is to make the connection of the rod head end into a threaded form (refer to the form of fig. 7), for example, the cylinder bottom is fixed with a threaded rod 610, an ear threaded hole is formed in the earring rod head 620, the threaded rod 610 is in threaded connection with the threaded hole of the earring rod head 620, the installation distance is changed by adjusting the screwing length of the threads, the thread adjustment distance in the prior art is X, and the overall installation distance is Y.

The existing fine adjustment oil cylinder structure has the following defects:

(1) The stress amplitude of the thread is high under the action of the push-pull load of the oil cylinder, and the thread is easy to fatigue and damage;

(2) For the current structure, the on-site adjustment is inconvenient, the labor intensity of workers is high, accessories such as pin shaft connectors and the like are generally required to be completely removed, and then the head threads of the rods are rotated, so that the adjustment of the installation distance is realized. In the adjusting process, the screw thread of the oil cylinder is easy to damage, and the screw thread is easy to damage after being adjusted and screwed for many times;

(3) The anti-loosening reliability of the thread of the club head is not high enough, and particularly, under the working condition that the oil cylinder is impacted by vibration, the anti-loosening effect is not good enough and the oil cylinder is easy to loosen by simply relying on the nut for anti-loosening;

(4) The long-term exposure of the screw thread has poor protection and is not suitable for the environment working condition with higher corrosion. If the corrosion-resistant material is replaced or an electroplating technology is used, the cost is increased, and the corrosion-resistant effect of the technology is not good.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems of the prior art.

Therefore, the oil cylinder with the adjustable installation distance can overcome the defects of the technology, can finely adjust the installation distance of the oil cylinder, has simpler structure, higher reliability, is not easy to damage, is simple to install and operate, reduces the labor intensity of workers, and has longer service life and better manufacturing cost.

The technical scheme adopted for solving the technical problems is as follows: an installation distance adjustable hydro-cylinder includes: the oil cylinder comprises an oil cylinder main body, wherein a first earring and a second earring are fixed at one end of the oil cylinder main body; one end of the eccentric pin shaft is arranged in the first ear ring, and the other end of the eccentric pin shaft is arranged in the second ear ring; the locking plate is arranged on one side, far away from the second earring, of the first earring, and is detachably connected with the first earring and connected with the eccentric pin shaft; the joint bearing is arranged between the first earring and the second earring, and the eccentric pin shaft is inserted into the joint bearing; the connecting piece is arranged between the first earring and the second earring, and the connecting piece is sleeved outside the knuckle bearing.

According to the oil cylinder with the adjustable installation distance, the installation distance between the oil cylinder main body and a load is adjusted by using the eccentric pin shaft, so that the problem that the traditional thread adjustment is easy to fatigue damage is solved; in addition, the adjustment mode is very convenient, and the work efficiency is improved.

Further, the eccentric pin shaft comprises a pin body, a pin head and a pin tail, one end of the pin body is fixedly connected with the pin head, the other end of the pin body is fixedly connected with the pin tail, the pin head and the pin tail are coaxially arranged, the axis of the pin body is parallel to the axis of the pin head, and the offset distance is m, wherein m is larger than 0.

Further, the pin body is arranged in the joint bearing, the pin head penetrates through the first ear ring and is connected with the locking plate, and the pin tail is arranged in the second ear ring.

Further, the pin head comprises a limiting head and a mounting head, wherein the limiting head is positioned above the mounting head, a limiting hole is formed in the locking plate, and the limiting head is connected with the limiting hole.

Furthermore, the locking plate is also provided with a fine-tuning waist-shaped hole, the fine-tuning waist-shaped hole is arc-shaped by taking the central point of the limiting head as the center of a circle, and a locking screw is arranged in the fine-tuning waist-shaped hole.

Further, the locking plate is further provided with a first anti-rotation pin and a second anti-rotation pin, which are symmetrically arranged with respect to the fine tuning waist-shaped hole.

Further, a gasket is further arranged between the locking plate and the locking screw.

Further, the knuckle bearing comprises a bearing inner ring and a bearing outer ring, the outer side surface of the bearing inner ring is matched with the inner side surface of the bearing outer ring,

Further, the inner side surface of the bearing inner ring is matched with the outer side surface of the pin body,

Further, the connecting piece is provided with a connecting through hole which is matched with the outer side surface of the bearing outer ring,

Furthermore, the connecting through hole, the bearing outer ring, the bearing inner ring and the pin body are coaxially sleeved layer by layer from outside to inside.

Further, a first space ring is arranged between the lower end face of the first earring and the upper end face of the bearing inner ring.

Further, a second spacer ring is arranged between the upper end face of the second ear ring and the lower end face of the bearing inner ring.

The utility model has the beneficial effects that the oil cylinder with the adjustable installation distance is provided, and the oil cylinder has the advantages of simple and stable structure, high reliability and better cost; the installation and operation are simple, and the labor intensity of workers is reduced; solves the defects that the traditional thread is easy to be fatigue damaged and has poor anti-loose effect; through setting up the locking plate, the problem that the eccentric pin is rotatory easily when having solved the hydro-cylinder and receiving vibration impact operating mode, and then guarantee the reliability of installation distance.

Drawings

The utility model will be further described with reference to the drawings and examples.

Fig. 1 is a schematic view of the overall structure of the present utility model.

Fig. 2 is a schematic structural view of the eccentric pin of the present utility model.

Fig. 3 is a schematic view of the structure of the locking plate of the present utility model.

Fig. 4 is a schematic view of the assembly of the locking plate of the present utility model.

Fig. 5 is a schematic view of an axis adjustable trajectory of an eccentric pin of the present utility model.

Fig. 6 is a schematic view of the small angle adjustment of the present utility model.

Fig. 7 is a schematic diagram of the overall structure of the prior art.

In the figure: 1. an oil cylinder main body; 11. a first earring; 12. a second earring; 2. eccentric pin shaft; 21. a pin body; 22. a pin head; 221. a positioning head; 222. a mounting head; 23. pin tail; 3. a locking plate; 31. a limiting hole; 32. fine tuning the waist-shaped hole; 33. a locking screw; 34. a first anti-rotation pin; 35. a second anti-rotation pin; 36. a gasket; 4. a knuckle bearing; 41. a bearing inner ring; 411. a first spacer; 412. a second spacer ring; 42. an outer ring of the bearing; 5. a connecting piece; 51. a connecting through hole; 610. a threaded rod; 620. earring club heads.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 6, the oil cylinder with an adjustable installation distance according to the present utility model includes: the oil cylinder comprises an oil cylinder main body 1, wherein a first earring 11 and a second earring 12 are fixed at one end of the oil cylinder main body 1; the eccentric pin shaft 2, one end of the eccentric pin shaft 2 is arranged in the first earring 11, and the other end is arranged in the second earring 12; the locking plate 3 is arranged on one side of the first earring 11 away from the second earring 12, the locking plate 3 is detachably connected with the first earring 11, and the locking plate 3 is connected with the eccentric pin shaft 2; the knuckle bearing 4 is arranged between an ear ring 11 and a second ear ring 12, and the eccentric pin shaft 2 is inserted into the knuckle bearing 4; the connecting piece 5, the connecting piece 5 is arranged between an earring 11 and a second earring 12, and the connecting piece 5 is sleeved outside the knuckle bearing 4. The mounting distance between the oil cylinder main body and the load is adjusted by using the eccentric pin shaft, so that the problem that the traditional thread pitch adjustment is easy to fatigue damage is solved; in addition, the adjustment mode is very convenient, and the work efficiency is improved. By arranging the locking plate, the problem that the eccentric pin shaft is easy to loose and offset when the oil cylinder is impacted by vibration is solved, so that the installation distance is changed.

The eccentric pin shaft 2 comprises a pin body 21, a pin head 22 and a pin tail 23, one end of the pin body 22 is fixedly connected with the pin head 21, the other end of the pin body 22 is fixedly connected with the pin tail 23, the pin head 22 and the pin tail 23 are coaxially arranged, the axis of the pin body 22 is parallel to the axis of the pin head 22, and the offset distance is m millimeters and m is more than 0.

For example, when the eccentric pin shaft 2 with the offset distance m is selected, wherein the axis of the pin head 22 is P, and the distance from the cylinder bottom to the axis P of the pin head 22 is b, the adjustment range of the installation distance is greater than or equal to b-m and less than or equal to b+m, and the installation distance drives the axis Q of the pin body 21 to rotate and adjust around the axis P of the pin head 22 by the length of the offset distance m through synchronous rotation of the pin head 22 and the pin tail 23 with respect to the axis P of the pin head 22, and the eccentric pin shaft 2 with different offset distances can be selected according to working conditions, so that the interchangeability and operability are strong, and particularly, the device has good economy in the field of equipment overhaul or modification.

If the adjustment range of the required installation distance of the working condition is greater than or equal to b-m and less than or equal to b+m, wherein the distance from the cylinder bottom to the axis P of the pin head 22 is b, the deflection offset distance of the axis Q of the pin body 21 relative to the axis P of the pin head 22 is m, when the specific installation distance required to be adjusted is n, and n=b+a, wherein the distance between the axis of the connecting through hole 51 and the axis of the through hole of the first earring 11 is a, and a=m×sin θ, the deflection angle of the axis Q of the pin body 21 relative to the axis P of the pin head 22 is θ.

The pin head 22 comprises a limiting head 221 and a mounting head 222, the limiting head 221 is located above the mounting head 222, a limiting hole 31 is formed in the locking plate 3, and the limiting head 221 is connected with the limiting hole 31. For example, the limiting head 221 has an outer hexagonal flange, the inner wall of the limiting hole 31 is a dodecagonal hole, and when the limiting head 221 is installed in the limiting hole 31, the limiting hole 31 can clamp the limiting head 221, so that the eccentric pin shaft 2 can be prevented from deflecting when the oil cylinder works. Threaded holes are formed in the limiting heads 221, so that lifting or disassembly in the adjustment process is facilitated. The locking plate 3 is also provided with a fine tuning waist-shaped hole 32, the fine tuning waist-shaped hole 32 is arc-shaped with the center point of the limiting head 221 as the center, and a locking screw 33 is arranged in the fine tuning waist-shaped hole 32. The locking plate 3 is further provided with a first anti-rotation pin 34 and a second anti-rotation pin 35, the first anti-rotation pin 34 and the second anti-rotation pin 35 being symmetrically arranged about the fine tuning waist hole 52. Thus, the fixing of the locking plate 3 is facilitated, the eccentric pin shaft 2 is prevented from rotating, the stability of the whole structure is improved, and the reliability of the installation distance after adjustment is ensured. When the installation distance adjustment is small, the locking plate 3 may not be detached, and only the first anti-rotation pin 34 and the second anti-rotation pin 35 need to be detached, and then the positioning head 221 and the locking plate 3 are rotated by a certain angle along the track of the fine adjustment waist-shaped hole 32. For example, a spacer 36 is also provided between the locking plate 3 and the locking screw 33.

The pin body 21 is mounted in the knuckle bearing 4, the pin head 22 penetrates the first ear ring 11 and is connected with the locking plate 3, and the pin tail 23 is mounted in the second ear ring 12. The knuckle bearing 4 comprises an inner bearing ring 41 and an outer bearing ring 42, the outer side surface of the inner bearing ring 41 is matched with the inner side surface of the outer bearing ring 42, the inner side surface of the inner bearing ring 41 is matched with the outer side surface of the pin body 21, the connecting piece 5 is provided with a connecting through hole 51, the connecting through hole 51 is matched with the outer side surface of the outer bearing ring 42, and the connecting through hole 51, the outer bearing ring 42, the inner bearing ring 41 and the pin body 21 are coaxially sleeved layer by layer from outside to inside. The inner bearing ring 41 and the outer bearing ring 42 can rotate relatively freely, so that the influence on the connecting piece 5 in the operation process is reduced, and the problem of part damage in the operation process is solved. For example, a first spacer 411 is provided between the lower end surface of the first ear ring 11 and the upper end surface of the bearing inner ring 41. A second spacer 412 is provided between the upper end surface of the second ear ring 12 and the lower end surface of the bearing inner ring 41.

Working principle: according to the oil cylinder with the adjustable installation distance, the pin head 22 can be rotated along the axis P of the pin head 22 by rotating the pin head 22, so that the axis Q of the pin body 21 is driven to take P as a circle center and the offset distance m as a radius, and an adjustment track C is formed. Through setting up joint bearing 4 for bearing inner ring 41 is connected with the pin body 21, and bearing outer ring 42 is connected with connecting piece 5, and locking screw realizes the fixed of round pin head 22 and locking plate 3 through threaded connection, and first anti-rotation pin 34 and second anti-rotation pin 35 have realized eccentric round pin axle 2, locking plate 3 and first earring 11's fixed connection through joining in marriage the brill mounting means, and then realize eccentric round pin axle 2's deflection angle θ's fixed, thereby realize that hydro-cylinder main part 1 and connecting piece 5's installation distance is adjustable.

When the adjustment range is smaller, the first anti-rotation pin 34 and the second anti-rotation pin 35 can be detached firstly, then the locking plate 3 is rotated to adjust the waist-shaped hole 32 to rotate along the stud of the locking screw 33, and after the locking plate 3 drives the eccentric pin shaft 2 to rotate to a required deflection angle, the first anti-rotation pin 34 and the second anti-rotation pin 35 are installed and fixed, so that the deflection angle of the eccentric pin shaft 2 is locked, and the adjustment process is completed.

When the adjustment range is larger, the first anti-rotation pin 34, the second anti-rotation pin 35, the locking screw 33 and the gasket 36 can be detached firstly, the locking plate 3 is detached again, the eccentric pin shaft 2 is rotated to a required deflection angle, and then the locking plate 3, the first anti-rotation pin 34, the second anti-rotation pin 35, the locking screw 33 and the gasket 36 are installed and fixed in sequence, so that the adjustment process is completed.

The above structure for adjusting the installation distance can be applied to the design of the head end of the pole as well.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined as the scope of the claims.

Claims (10)

1. An oil cylinder with an adjustable installation distance, which is characterized by comprising:

The oil cylinder comprises an oil cylinder main body (1), wherein a first earring (11) and a second earring (12) are fixed at one end of the oil cylinder main body (1);

One end of the eccentric pin shaft (2) is arranged in the first earring (11), and the other end of the eccentric pin shaft (2) is arranged in the second earring (12);

The locking plate (3) is arranged on one side, far away from the second earring (12), of the first earring (11), the locking plate (3) is detachably connected with the first earring (11), and the locking plate (3) is connected with the eccentric pin shaft (2);

The knuckle bearing (4) is arranged between an earring (11) and a second earring (12), and the eccentric pin shaft (2) is inserted into the knuckle bearing (4);

the connecting piece (5), connecting piece (5) set up between an earring (11) and second earring (12), just connecting piece (5) suit is outside joint bearing (4).

2. The adjustable mounting distance cylinder according to claim 1, wherein:

The eccentric pin shaft (2) comprises a pin body (21), a pin head (22) and a pin tail (23), one end of the pin body (22) is fixedly connected with the pin head (21), the other end of the pin body is fixedly connected with the pin tail (23), the pin head (22) and the pin tail (23) are coaxially arranged, the axis of the pin body (22) is parallel to the axis of the pin head (22), and the offset distance is m, wherein m is larger than 0.

3. The distance-adjustable cylinder according to claim 2, wherein:

The pin body (21) is arranged in the knuckle bearing (4), the pin head (22) penetrates through the first earring (11) and is connected with the locking plate (3), and the pin tail (23) is arranged in the second earring (12).

4. A distance-adjustable cylinder according to claim 3, wherein:

The pin head (22) comprises a limiting head (221) and a mounting head (222), the limiting head (221) is located above the mounting head (222), a limiting hole (31) is formed in the locking plate (3), and the limiting head (221) is connected with the limiting hole (31).

5. The adjustable mounting distance cylinder as set forth in claim 4, wherein:

The locking plate (3) is also provided with a fine-tuning waist-shaped hole (32), the fine-tuning waist-shaped hole (32) is arc-shaped by taking the central point of the limiting head (221) as the center of a circle, and a locking screw (33) is arranged in the fine-tuning waist-shaped hole (32).

6. The adjustable mounting distance cylinder of claim 5, wherein:

The locking plate (3) is further provided with a first anti-rotation pin (34) and a second anti-rotation pin (35), and the first anti-rotation pin (34) and the second anti-rotation pin (35) are symmetrically arranged about the fine adjustment waist-shaped hole (52).

7. The adjustable mounting distance cylinder as set forth in claim 6, wherein:

a gasket (36) is further arranged between the locking plate (3) and the locking screw (33).

8. The distance-adjustable cylinder according to claim 2, wherein:

The knuckle bearing (4) comprises a bearing inner ring (41) and a bearing outer ring (42), the outer side surface of the bearing inner ring (41) is matched with the inner side surface of the bearing outer ring (42),

The inner side surface of the bearing inner ring (41) is matched with the outer side surface of the pin body (21),

The connecting piece (5) is provided with a connecting through hole (51), the connecting through hole (51) is matched with the outer side surface of the bearing outer ring (42),

The connecting through holes (51), the bearing outer ring (42), the bearing inner ring (41) and the pin bodies (21) are coaxially sleeved layer by layer from outside to inside.

9. The adjustable mounting distance cylinder as set forth in claim 8, wherein:

A first space ring (411) is arranged between the lower end face of the first earring (11) and the upper end face of the bearing inner ring (41).

10. The adjustable mounting distance cylinder as claimed in claim 9, wherein:

A second spacer ring (412) is arranged between the upper end face of the second earring (12) and the lower end face of the bearing inner ring (41).