CN212455316U

CN212455316U - Damping-adjustable oil buffer

Info

Publication number: CN212455316U
Application number: CN202021294950.7U
Authority: CN
Inventors: 张玉光
Original assignee: Suzhou C Jac Buffer Technology Co ltd
Current assignee: Suzhou C Jac Buffer Technology Co ltd
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2021-02-02
Anticipated expiration: 2030-07-06

Abstract

The utility model discloses a damping-adjustable hydraulic buffer, which comprises an inner cylinder, a middle cylinder, an outer cylinder, a piston, a shaft lever and a collided head, wherein the middle cylinder is sleeved on the inner cylinder, the middle cylinder is arranged in the outer cylinder, a ring cavity is arranged between the middle cylinder and the outer cylinder, an inner cavity is arranged in the inner cylinder, and hydraulic oil is filled in the inner cavity; one end of the shaft lever is connected with the piston, the other end of the shaft lever is connected with the collided head, and the piston is arranged in the inner cavity in a sliding mode; a plurality of cam grooves are formed in the outer wall of the inner cylinder, the cam grooves are inclined to the end face of the inner cylinder, first overflow holes communicated with the inner cavity and the cam grooves are formed in the inner cylinder in a penetrating mode, a plurality of second overflow holes are formed in the middle cylinder in a penetrating mode, the positions of the second overflow holes and the positions of the cam grooves correspond to each other, and when the inner cylinder rotates relative to the middle cylinder, the area of the coincident area of the cam grooves and the areas of the second overflow holes can change. The utility model provides a hydraulic buffer with adjustable damping, the damping size is adjustable to the kinetic energy that produces when the maximize absorbs the buffering, its cam groove processing is high-efficient, and the damping adjustment is effectual.

Description

Damping-adjustable oil buffer

Technical Field

The utility model relates to a buffer especially relates to an oil buffer with adjustable damping.

Background

The hydraulic buffer is an element applied to automatic mechanical operation, can reduce vibration and noise generated in the mechanical operation process, improves the efficiency of the machine, increases the productivity, effectively prolongs the service life of the machine and reduces the maintenance cost; the working principle is to convert the kinetic energy generated by the moving object into heat energy and release the heat energy into the atmosphere.

Most bumpers on the market at present all adopt the formula amortization cover of outer knot, and when being hit the head pressurized to the stroke stopper, the amortization cap can be by compression deformation because of elasticity, and the position that the mechanism stopped can change along with the ageing deformation of amortization cap. This is not satisfactory for some mechanisms that have a position stop requirement. The external buckling type silencing sleeve can expand outwards, crack and fall off after being used for a period of time.

The damping adjustment structure of the middle inner cylinder of the buffer on the market mills an oil groove from shallow to deep on the excircle of the inner cylinder through a milling cutter, and adjusts the positions of different depths of the oil groove of the inner cylinder relative to an overflow hole of the middle cylinder to achieve the effect of adjustment. And when in use, a little foreign matter can be clamped between the middle cylinder and the inner cylinder, so that the clamping is dead and the rotation adjustment cannot be carried out.

Most buffers on the market today use separate travel stops. The separate travel limiter needs to be connected with the outer cylinder in a threaded mode, the cost is increased, and the size is large and the installation is inconvenient.

Therefore, the conventional buffer has various defects, and cannot simultaneously achieve accurate stopping and buffering, so that improvement is required.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an oil buffer with adjustable damping, its purpose is to adjust the difficult problem of processing in the groove of damping usefulness among the oil buffer.

In order to achieve the above purpose, the technical scheme of the utility model is as follows: a damping-adjustable hydraulic buffer comprises an inner cylinder, a middle cylinder, an outer cylinder, a piston, a shaft lever and a collision head, wherein the middle cylinder is sleeved on the inner cylinder and arranged in the outer cylinder;

one end of the shaft lever is connected with the piston, the other end of the shaft lever is connected with the collided head, and the piston is arranged in the inner cavity in a sliding mode;

the outer wall of the inner cylinder is provided with a plurality of cam grooves, the cam grooves are inclined to the end face of the inner cylinder, the inner cylinder is provided with a first overflow hole communicated with the inner cavity, the middle cylinder is provided with a plurality of second overflow holes, the second overflow holes correspond to the cam grooves in position, and when the inner cylinder is opposite to the middle cylinder, the area of the overlapped area of the cam grooves and the second overflow holes is changed.

Preferably, one side of the inner cylinder is provided with a shifting part, and the shifting part is provided with a clamping groove.

Preferably, one end of the outer cylinder is provided with a rear cover, and the rear cover is sleeved on the shifting part.

Preferably, a plurality of the cam grooves are uniformly arranged in parallel, and the cam grooves extend inwards from the outer wall of the inner cylinder.

Preferably, one end of the inner cylinder is connected with a shaft rod guider, the shaft rod penetrates through the shaft rod guider, and a sealing ring is arranged between the shaft rod and the shaft rod guider.

Preferably, the shaft rod guide is arranged in the outer cylinder, and the end part of the outer cylinder limits the shaft rod by abutting against the collided head.

Preferably, the shaft rod guider is provided with an annular positioning groove in an encircling manner, pressure accumulation cotton is installed in the annular positioning groove, and the annular positioning groove is communicated with the annular cavity.

Preferably, a return spring is sleeved on the shaft rod and is positioned between the collided head and the shaft rod guider.

Preferably, the head is provided with an installation groove, and a silencing pad is clamped in the installation groove.

The utility model has the advantages that: the utility model provides a hydraulic buffer with adjustable damping, cam groove and second overflow hole coincidence area's area change when the relative well jar of inner casing rotates to the damped size of adjustment, with the kinetic energy that produces when the maximize absorbs the buffering, this cam groove processing is high-efficient, and the damping adjustment is effectual. The utility model discloses a amortization pad is embedded, is difficult not hard up. The utility model discloses an outer jar restriction forms, does not need additionally to increase the stopper, consequently the cost is reduced, has reduced the volume.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the inner cylinder;

FIG. 3 is a schematic view of the construction of the shaft guide;

wherein: 1. the hydraulic cylinder comprises an inner cylinder, a middle cylinder, an outer cylinder, an inner cavity, an annular cavity, a cam groove, a first overflow hole, a second overflow hole, a toggle part, a clamping groove, a rear cover, a piston, a shaft rod, a collision head, a silencing pad, a shaft rod guider, a ring-shaped positioning groove, a pressure accumulating cotton, a sealing ring, a return spring and a piston, wherein the inner cylinder is 2, the middle cylinder is 3, the outer cylinder is 4, the inner cavity is 5, the annular cavity is 6, the cam groove is 7, the first overflow hole is 8, the second overflow hole is.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

In the description of the present invention, it should be noted that the terms "left", "right", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, the present embodiment provides an adjustable-damping hydraulic shock absorber, which includes an inner cylinder 1, an intermediate cylinder 2, an outer cylinder 3, a piston 12, a shaft 13, and a striker 14.

The inner cylinder 1, the middle cylinder 2 and the outer cylinder 3 are all cylindrical cylinders. An inner cavity 4 is arranged in the inner cylinder 1, and hydraulic oil is filled in the inner cavity 4. The middle cylinder 2 is sleeved on the inner cylinder 1, the middle cylinder 2 is arranged in the outer cylinder 3, and an annular cavity 5 is arranged between the middle cylinder 2 and the outer cylinder 3.

The left end of the shaft 13 is connected to the piston 12, and the right end of the shaft 13 is connected to the head 14. A piston 12 is slidably disposed within the interior chamber 4. The shaft 13 penetrates the right end of the inner cylinder 1. When the hydraulic shock absorber is not pressurized, the piston 12 is located at the right portion of the inner cylinder 1. The right side surface of the collided head 14 is provided with a mounting groove, and a silencing pad 15 is clamped in the mounting groove. The sound-deadening pad 15 is raised relative to the struck head 14.

The right end of the inner cylinder 1 is connected with a shaft guide 16, the shaft 13 penetrates through the shaft guide 16, and the shaft 13 is slidable relative to the shaft guide 16. A sealing ring 19 is provided between the shaft 13 and the shaft guide 16 to prevent leakage of hydraulic oil from the inner chamber 4.

The shaft 13 is sleeved with a return spring 20, and the return spring 20 is located between the collided head 14 and the shaft guide 16. The shaft guide 16 and the striker 14 are provided with stepped portions for facilitating abutment of the return spring 20. The return spring 20 is used to quickly return the ram 14, the shaft 13, and the piston 12, which have moved to the left, to perform buffering at the next force application.

The outer cylinder 3 in this embodiment is also a stroke limiter. Specifically, the right side of the outer cylinder 3 is open, and the inner cylinder 1 and the shaft guide 16 are both located inside the outer cylinder 3. The end of the outer cylinder 3 limits the shaft 13 by abutting against the ram 14 to control the stroke of the adjustable damping hydraulic shock absorber. Compared with a traditional hydraulic buffer with a stroke limiter screwed on an outer cylinder, the oil cylinder limiter in the embodiment has small volume and reduces cost.

Referring to fig. 2, the outer wall of the inner cylinder 1 is provided with a plurality of cam grooves 6. The plurality of cam grooves 6 are identical in shape and parallel to each other, and are distributed along the axial direction of the inner cylinder 1. The cam groove 6 is inclined to the left and right end surfaces of the inner cylinder 1, that is, the cam groove 6 is not a standard circular ring, but has a convex shape with a positional change in the left-right direction. The cam groove 6 extends inward from the outer wall of the inner cylinder 1. The groove depth of the cam groove 6 is uniform. When the cam groove 6 is machined, the cam groove 6 can be formed by the cutter only by changing the position in the left-right direction. The oil grooves in the traditional oil pressure buffer have different depths, so that the depth of the cutter needs to be changed during machining, the machining is difficult, the change of the depth can accelerate the abrasion of the cutter, and the cost is increased. The cam groove 6 in the present embodiment does not have the above-described drawbacks.

A first overflow hole 7 for communicating the inner cavity 4 and the cam groove 6 is arranged on the inner cylinder 1 in a penetrating way. A first overflow aperture 7 is provided in each cam slot 6. A plurality of second overflow holes 8 are arranged on the middle cylinder 2 in a penetrating way, and the positions of the second overflow holes 8 correspond to the positions of the cam grooves 6. One second overflow hole 8 per cam slot 6. The inner cylinder 1 can rotate relative to the middle cylinder 2, and the rotation direction of the inner cylinder is that the rotation shaft rotates by taking the axis of the inner cylinder as a rotating shaft. The area of the area where the cam groove 6 coincides with the second spill orifice 8 changes when the inner cylinder 1 rotates relative to the middle cylinder 2.

Referring to fig. 3, the shaft rod guide 16 is provided with an annular positioning groove 17, pressure accumulation cotton 18 is installed in the annular positioning groove 17, and the annular positioning groove 17 is communicated with the annular cavity 5.

When the hydraulic buffer is pressurized, hydraulic oil flows in the direction from the first overflow hole 7 of the inner cylinder 1 into the cam groove 6, then flows from the second overflow hole 8 into the annular cavity 5, and finally flows to compress the pressure accumulation cotton 18.

The principle of the damping adjustment of the damping-adjustable hydraulic buffer is as follows:

the inner cylinder 1 is rotated to change the area of the overlapping area of the cam groove 6 of the inner cylinder 1 and the second overflow hole 8, thereby changing the overflow area of the middle cylinder 2 and adjusting the damping of the hydraulic shock absorber. When adjusted to the most suitable position, the absorption of kinetic energy generated by the object is maximized.

The left side of the inner cylinder 1 is provided with a shifting part 9, and the left side of the shifting part 9 is provided with a clamping groove 10. The slot 10 is a position for inserting a wrench, and has a hexagonal shape. A wrench is inserted into the slot 10 and then the wrench is rotated, thereby rotating the inner cylinder 1 to adjust damping. The left side of the outer cylinder 3 is provided with a rear cover 11, and the rear cover 11 is sleeved on the toggle part 9. So that the person can adjust the damping of the hydraulic shock absorber manually and conveniently and quickly.

As a further preferable mode of the above-described configuration, the plurality of cam grooves 6 are uniformly arranged in parallel to each other, so that the flow rate of the hydraulic oil in each of the first spill holes 7 is uniform, thereby improving stability.

The working process of the hydraulic buffer with adjustable damping comprises the following steps:

when the head 14 is impacted by external force, the silencing pad 15 contacts the external force first to generate elastic deformation to reduce noise, and meanwhile, the shaft rod 13 pushes the piston 12 to move leftwards to extrude the hydraulic oil in the inner cylinder 1. The hydraulic oil flows through the cam groove 6 on the inner cylinder 1 after being pressurized, flows into the annular cavity 5 through the second overflow hole 8 of the middle cylinder 2, and continues to flow rightwards to compress the pressure accumulation cotton 18. When the striker 14 and the noise-damping pad 15 are retracted into the outer cylinder 3 at the end of the stroke, the end of the outer cylinder 3 stops the movement of the striker 14 by continuing the operation of the side restraining mechanism against the striker 14. The movement of the ram 14 compressively deforms the return spring 20, and when the external force is removed, the return spring 20 restores the shaft 13 to its original position. When the damping effect is not ideal after the last working cycle is finished, the inner cylinder 1 can be rotated by the wrench, so that the damping size of the hydraulic buffer can be adjusted. When adjusted to the most suitable position, the absorption of kinetic energy generated by the object is maximized.

The hydraulic buffer with adjustable damping in this embodiment utilizes the cam groove structure, and 6 processing high efficiencies in the cam groove, and the damping adjustment effect is better. The hydraulic shock absorber can be buffered and stopped accurately due to the outer cylinder 3 as a stroke limiter and the insertion of the silencing pad 15.

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 hydraulic buffer with adjustable damping is characterized by comprising an inner cylinder (1), a middle cylinder (2), an outer cylinder (3), a piston (12), a shaft rod (13) and a collision head (14), wherein the middle cylinder (2) is sleeved on the inner cylinder (1), the middle cylinder (2) is arranged in the outer cylinder (3), an annular cavity (5) is arranged between the middle cylinder (2) and the outer cylinder (3), an inner cavity (4) is arranged in the inner cylinder (1), and hydraulic oil is filled in the inner cavity (4);

one end of the shaft lever (13) is connected with the piston (12), the other end of the shaft lever (13) is connected with the collided head (14), and the piston (12) is arranged in the inner cavity (4) in a sliding mode;

seted up a plurality of cam grooves (6) on the outer wall of inner tube (1), cam groove (6) slope in the terminal surface of inner tube (1), wear to be equipped with the intercommunication on inner tube (1) inner chamber (4) with first overflow hole (7) of cam groove (6), wear to be equipped with a plurality of second overflow holes (8) on well jar (2), second overflow hole (8) with the position of cam groove (6) is corresponding, works as inner tube (1) is relative when well jar (2) rotates cam groove (6) with the area change in second overflow hole (8) coincidence region.

2. The hydraulic buffer with adjustable damping as claimed in claim 1, characterized in that a toggle part (9) is provided at one side of the inner cylinder (1), and a slot (10) is provided on the toggle part (9).

3. The hydraulic shock absorber with adjustable damping as claimed in claim 2, wherein a rear cover (11) is mounted at one end of the outer cylinder (3), and the rear cover (11) is sleeved on the toggle part (9).

4. The hydraulic shock absorber with adjustable damping of claim 1, wherein a plurality of the cam grooves (6) are uniformly arranged in parallel, and the cam grooves (6) extend inward from the outer wall of the inner cylinder (1).

5. The hydraulic shock absorber with adjustable damping according to claim 1, characterized in that a shaft guide (16) is connected to one end of the inner cylinder (1), the shaft (13) penetrates the shaft guide (16), and a sealing ring (19) is arranged between the shaft (13) and the shaft guide (16).

6. The damping-adjustable hydraulic shock absorber according to claim 5, wherein the shaft guide (16) is provided inside the outer cylinder (3), and an end of the outer cylinder (3) limits the shaft (13) by abutting against the head (14).

7. The adjustable-damping hydraulic shock absorber according to claim 6, wherein the shaft guide (16) is annularly provided with an annular positioning groove (17), pressure accumulation cotton (18) is installed in the annular positioning groove (17), and the annular positioning groove (17) is communicated with the annular cavity (5).

8. The adjustable-damping hydraulic shock absorber according to claim 5, wherein a return spring (20) is fitted over the shaft (13), the return spring (20) being located between the striker (14) and the shaft guide (16).

9. The hydraulic shock absorber with adjustable damping according to claim 1, wherein a mounting groove is provided on the head (14), and a noise-damping pad (15) is engaged in the mounting groove.