CN219840961U

CN219840961U - front suspension cylinder

Info

Publication number: CN219840961U
Application number: CN202320953281.7U
Authority: CN
Inventors: 童泽钦; 白正双; 李世魁; 徐国江; 李相铉
Original assignee: Zhejiang Afante Prec Equipment Mfg Co ltd
Current assignee: Zhejiang Avant Hydraulic Technology Co ltd
Priority date: 2023-04-21
Filing date: 2023-04-21
Publication date: 2023-10-17
Anticipated expiration: 2033-04-21

Abstract

The utility model relates to a front suspension cylinder, comprising: the cylinder barrel is provided with an oil port, an inflation valve, a cylinder bottom connected with the lower end of the cylinder barrel, a guide sleeve arranged at the upper end of the cylinder barrel, a piston rod penetrating through the guide sleeve and provided with a rod counter bore at the lower end, a piston with a rod cavity and a rod cavity, a communication hole arranged at the lower end of the piston rod and communicated with the rod counter bore, a damping hole arranged at the side wall of the piston rod, and a damping one-way valve, wherein the upper end of the piston rod is connected with the lower end of the piston rod and divides the cylinder barrel into a rod-free cavity and a piston with the rod cavity; two ends of the damping hole are communicated with the rod counter bore and the rod cavity in a one-to-one correspondence manner; the inlet end of the damping one-way valve is communicated with the rod counter bore, and the outlet end of the damping one-way valve is communicated with the rod cavity; the damping hole and the damping one-way valve are symmetrically arranged. The front suspension cylinder has the advantages that the rigidity of the whole vehicle is adjustable, the response speed and the stability of the piston rod are good when the piston rod moves at a short stroke and a high frequency, the damping characteristic and the buffering effect are good, and the piston is firmly connected with the piston rod and is not easy to fall off.

Description

Front suspension cylinder

Technical Field

The utility model relates to the technical field of automobile hydro-pneumatic suspension, in particular to a front suspension cylinder.

Background

Currently, main stream suspension systems used in mining dump trucks are mainly classified into leaf spring type and hydro-pneumatic suspension type. The plate spring type suspension system adjusts the drivability of the mine car by designing the rigidity and the number of plates of the plate spring, so that the front axle is small in load usually, the plate spring is low in design rigidity and the number of plates is small, and the damping effect is improved; the rear axle has large load, high design rigidity of the plate spring, multiple plates and increased bearing capacity, but in rough and rough road conditions in mining areas, the plate spring of the front axle of the mine car has insufficient strength, is easy to fail, has poor buffering effect, has larger vibration impact on the whole frame, and reduces the fatigue life of the bearing parts of the mine car. In the late sixties of the last century, a gas-oil mixing suspension cylinder is adopted; the utility model of Chinese patent CN201220643929.2 relates to a front hydro-pneumatic suspension cylinder of an automobile, which comprises a cylinder body, wherein the cylinder body is provided with an inner cavity, and is characterized in that an inflation tube is axially arranged at the end of the cylinder body, one end of the inflation tube extends into the inner cavity of the cylinder body, the other end of the inflation tube extends out of the cylinder body, and a cover cap is arranged on a tube body of the inflation tube extending out of the cylinder body. The traditional front hydro-pneumatic suspension cylinder of the automobile is characterized in that the rigidity requirement of the front hydro-pneumatic suspension cylinder of the automobile in a full-load state of the mine car is solved, the vibration impact requirement of the automobile frame in severe road conditions is improved, but the rigidity of the whole automobile is still unadjustable, the response speed and the stability of a piston rod are poor in a short-stroke high-frequency motion process, the damping characteristic and the buffering effect are poor, and the piston is not firmly connected with the piston rod and is easy to fall off; therefore, the front suspension cylinder with adjustable rigidity of the whole vehicle and good damping characteristic and buffering effect is designed, and the piston rod is fast and stable in response and good in buffering effect when in short-stroke high-frequency motion, and the piston is firmly connected with the piston rod and is not easy to fall off, so that the front suspension cylinder becomes a problem to be solved urgently.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide the front suspension cylinder with adjustable rigidity, better response speed and stability, better damping characteristic and buffering effect when the piston rod moves at a short stroke and a high frequency, and stable connection between the piston and the piston rod and difficult falling.

The specific technical scheme of the utility model is as follows:

a front suspension cylinder comprising: the cylinder barrel is provided with an oil port, an inflation valve, a cylinder bottom connected with the upper end of the cylinder barrel, a guide sleeve arranged at the lower end of the cylinder barrel, a piston rod penetrating through the guide sleeve and provided with a rod counter bore at the upper end, a piston with a rod cavity and a piston with a rod cavity, a communication hole arranged at the upper end of the piston and communicated with the rod counter bore, a damping hole arranged at the side wall of the piston rod, and a damping check valve, wherein the lower end of the piston rod is connected with the upper end of the piston rod and divides the cylinder barrel into a rod-free cavity and a rod cavity; two ends of the damping hole are communicated with the rod counter bore and the rod cavity in a one-to-one correspondence manner; the inlet end of the damping one-way valve is communicated with the rod counter bore, and the outlet end of the damping one-way valve is communicated with the rod cavity; the damping hole and the damping one-way valve are symmetrically arranged.

Preferably, the front suspension cylinder further comprises: a plurality of bolts and a plurality of elastic washers sleeved outside the bolts in a one-to-one correspondence manner; the communication hole is a stepped hole with a small end communicated with the rod counter bore; the lower end of the piston is provided with a fixed counter bore, the upper end of the piston rod is positioned in the fixed counter bore, the piston is connected with the piston rod through a bolt, and the head of the bolt is positioned in the large end of the stepped hole; the plurality of bolts are circumferentially distributed along the piston axis.

Preferably, the diameter of the small end of the stepped hole is larger than that of the counter bore of the rod; the lower part of the small end side wall of the stepped hole is welded with the upper end of the piston rod through fillet weld.

Preferably, the damping check valve includes: the conical frustum-shaped holes are arranged on the outer side wall of the piston rod and are higher than the lower end of the piston, the inlet holes are arranged on the inner side wall of the counter bore of the rod and are smaller than the diameter of the outlet holes, the two ends of the conical frustum-shaped holes are communicated with the inner end of the outlet holes and the outer end of the inlet holes in a one-to-one correspondence manner, the steel balls are arranged in the outlet holes, and the annular grooves are arranged at the lower end of the piston and are communicated with the lower part of the outlet holes; the diameter of the steel ball is larger than the diameter of the inlet hole and smaller than the diameter of the outlet hole; the diameter of the annular groove is larger than that of the fixed counter bore.

Preferably, a piston support ring is arranged on the outer periphery of the piston.

Preferably, honing lines are arranged on the inner side wall of the cylinder barrel.

Preferably, a supporting ring is arranged on the inner side of the guide sleeve in a surrounding manner, and a plurality of oil grooves are formed in the inner side of the supporting ring in a surrounding manner; the oil grooves are distributed along the axial direction of the supporting ring.

Preferably, at least one sealing ring is arranged on the outer side of the guide sleeve in a surrounding manner; the sealing ring is an O-shaped sealing ring.

Preferably, the front suspension cylinder further comprises: the damping buffer cover is sleeved outside the cylinder rod, the lower end of the damping buffer cover is connected with the piston rod, and the upper end of the damping buffer cover is connected with the cylinder barrel.

Compared with the prior art, the utility model has the beneficial effects that: the front suspension oil cylinder is characterized in that an oil port and an inflation valve are arranged on the cylinder bottom, when the front suspension oil cylinder is assembled, according to the designed oil-gas proportion, the mixed fluid of hydraulic oil and nitrogen is inflated into the oil cylinder, the suspension softness can be adjusted according to the requirement by controlling and adjusting the pressure of the nitrogen, and the rigidity of the whole vehicle is adjustable; when the mine car passes through the pit, the piston rod is pulled downwards, fluid in the rod cavity enters the rodless cavity through the damping hole, and meanwhile, the steel ball of the damping one-way valve and the frustum-shaped hole form conical surface sealing, so that a one-way interception effect is achieved, and the piston rod is slow in stretching action; when the mine car falls down, the piston rod is pressed to reset upwards, fluid in the rodless cavity enters the rod cavity through the damping hole, and simultaneously the fluid enters the inlet Kong Dingkai steel ball of the damping one-way valve, so that the steel ball is separated from the conical surface of the frustum-shaped hole, and the fluid enters the rod cavity through the outlet hole; the damping hole and the damping one-way valve play a damping role together, the piston rod responds fast and stably when in short-stroke high-frequency motion, the damping characteristic and the buffering effect are good, the suspension is not hard, the bumpy feeling is reduced, and the driving experience is more comfortable. The elastic washer sleeved outside the bolt is arranged, the upper end of the piston rod is positioned in the fixed counter bore, the piston is connected with the piston rod through the bolt, the lower part of the side wall of the small end of the stepped hole is welded with the upper end of the piston rod through the fillet weld, the piston is firmly connected with the piston rod and is not easy to fall off, and the piston rod can not rotate relatively. The annular groove is arranged at the lower end of the piston and is communicated with the lower part of the outlet hole, and the steel ball is blocked from being separated from the outlet hole. The inner side wall of the cylinder barrel is provided with honing patterns, and oil storage at the concave parts of the honing patterns can reduce friction resistance between the piston and the inner hole of the cylinder barrel during movement. The side wall in the supporting ring is provided with a plurality of oil grooves, and oil storage in the oil grooves can effectively lubricate the piston rod in a high-frequency short-stroke motion mode, so that heat conduction is facilitated, and friction resistance is reduced.

Drawings

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

In the figure: the cylinder barrel 1, the oil port 2, the inflation valve 3, the cylinder bottom 4, the guide sleeve 5, the rod counter bore 6, the piston rod 7, the rodless cavity 8, the rod cavity 9, the piston 10, the stepped hole 11, the damping hole 12, the bolt 13, the elastic gasket 14, the fixed counter bore 15, the outlet hole 16, the inlet hole 17, the frustum-shaped hole 18, the steel ball 19, the annular groove 20, the piston support ring 21, the support ring 22, the oil groove 23 and the sealing ring 24.

Detailed Description

The utility model is further described below with reference to the drawings.

As shown in fig. 1: a front suspension cylinder comprising: the cylinder barrel 1 is provided with an oil port 2 and an inflation valve 3, a cylinder bottom 4 which is in threaded connection with the upper end of the cylinder barrel 1, a guide sleeve 5 which is arranged at the lower end of the cylinder barrel 1, a piston rod 7 which penetrates through the guide sleeve 5 and is provided with a rod counter bore 6 at the upper end, a piston 10 which is arranged in the cylinder barrel 1 and divides the interior of the cylinder barrel 1 into a rodless cavity 8 and a rod cavity 9, a stepped hole 11 which is arranged at the upper end of the piston plug 10 and is communicated with the rod counter bore 6 at the small end, a damping hole 12 and a damping one-way valve which are arranged at the side wall of the piston rod 7, six bolts 13 and six elastic gaskets 14 which are sleeved outside the bolts 13 in a one-to-one correspondence manner; two ends of the damping hole 12 are communicated with the rod counter bore 6 and the rod cavity 9 in a one-to-one correspondence manner; the damping hole 12 is symmetrically arranged with the damping check valve.

The lower end of the piston 10 is provided with a fixed counter bore 15, the upper end of the piston rod 7 is positioned in the fixed counter bore 15, six bolts 13 are uniformly distributed along the circumferential direction of the axis of the piston 10, the piston 10 is connected with the piston rod 7 through the bolts 13, and the head of the bolts 13 is positioned in the large end of the stepped hole 11; the diameter of the small end of the stepped hole 11 is larger than that of the rod counter bore 6; the lower part of the side wall at the small end of the stepped hole 11 is welded with the upper end of the piston rod 7 through fillet weld.

The damping check valve includes: the outlet hole 16 is arranged on the outer periphery of the piston rod 7 and is higher than the lower end of the piston 10, the inlet hole 17 is arranged on the inner periphery of the rod counter bore 6 and has a diameter smaller than that of the outlet hole 16, the two ends of the conical frustum-shaped hole 18 are correspondingly communicated with the inner end of the outlet hole 16 and the outer end of the inlet hole 17 one by one, the steel ball 19 is arranged in the outlet hole 16, and the annular groove 20 is arranged on the upper end of the piston 10 and is communicated with the lower part of the outlet hole 16; the diameter of the steel ball 19 is larger than the diameter of the inlet hole 17 and smaller than the diameter of the outlet hole 16; the diameter of the annular recess 20 is greater than the diameter of the fixed counterbore 15.

The outer periphery of the piston 10 is provided with a piston supporting ring 21; honing lines are arranged on the inner side of the cylinder barrel 1.

The inner side of the guide sleeve 5 is surrounded by a supporting ring 22, and the inner side of the supporting ring 22 is surrounded by a plurality of oil grooves 23; the oil grooves 23 are axially distributed along the support ring 22; two sealing rings 24 are arranged on the outer side of the guide sleeve 5 in a surrounding manner; the seal 24 is an O-ring seal.

In addition to the above embodiments, the technical features or technical data of the present utility model may be rearranged and combined within the scope of the claims and the description of the present utility model to constitute new embodiments, which may be implemented without inventive effort by those skilled in the art, and thus, embodiments of the present utility model not described in detail should be considered as embodiments of the present utility model within the scope of the protection of the present utility model.

Claims

1. A front suspension cylinder comprising: cylinder, be equipped with hydraulic fluid port and charging valve and with the cylinder bottom of being connected of cylinder upper end, adorn in the uide bushing of cylinder lower extreme, characterized by, preceding suspension cylinder still include: the piston rod penetrates through the guide sleeve, the upper end of the piston rod is provided with a rod counter bore, the piston is connected with the upper end of the piston rod and divides the cylinder barrel into a rodless cavity and a piston with a rod cavity, the communication hole is arranged at the upper end of the piston and communicated with the rod counter bore, and the damping hole and the damping check valve are arranged at the side wall of the piston rod; two ends of the damping hole are communicated with the rod counter bore and the rod cavity in a one-to-one correspondence manner; the inlet end of the damping one-way valve is communicated with the rod counter bore, and the outlet end of the damping one-way valve is communicated with the rod cavity.

2. The front suspension cylinder as set forth in claim 1 wherein said front suspension cylinder further comprises: a plurality of bolts and a plurality of elastic washers sleeved outside the bolts in a one-to-one correspondence manner; the communication hole is a stepped hole with a small end communicated with the rod counter bore; the lower end of the piston is provided with a fixed counter bore, the upper end of the piston rod is positioned in the fixed counter bore, the piston is connected with the piston rod through a bolt, and the head of the bolt is positioned in the large end of the stepped hole.

3. The front suspension cylinder as claimed in claim 2, wherein the diameter of the small end of the stepped bore is larger than the diameter of the stem counterbore; the lower part of the small end side wall of the stepped hole is welded with the upper end of the piston rod.

4. A front suspension cylinder as claimed in claim 1, 2 or 3, wherein said damping check valve comprises: an outlet hole which is arranged on the outer side wall of the piston rod and is higher than the lower end of the piston, an inlet hole which is arranged on the inner side wall of the counter bore of the rod and has a diameter smaller than the diameter of the outlet hole, the two ends of the conical frustum-shaped hole are communicated with the inner end of the outlet hole and the outer end of the inlet hole in a one-to-one correspondence manner, the steel ball is arranged in the outlet hole, and the annular groove is arranged at the lower end of the piston and communicated with the lower part of the outlet hole.

5. A front suspension cylinder as claimed in claim 1, 2 or 3, wherein the piston is provided with a piston support ring around the outer periphery thereof.

6. A front suspension cylinder as claimed in claim 1, 2 or 3, wherein the cylinder barrel inner side wall is provided with honing patterns.

7. A front suspension cylinder as claimed in claim 1, 2 or 3, wherein the guide sleeve is provided with a support ring around the inner side thereof, and a plurality of oil grooves are provided around the inner side of the support ring.

8. A front suspension cylinder as claimed in claim 1, 2 or 3, wherein at least one sealing ring is provided around the outside of the guide sleeve.

9. A front suspension cylinder as claimed in claim 1, 2 or 3, further comprising: the damping buffer cover is sleeved outside the cylinder rod, the lower end of the damping buffer cover is connected with the piston rod, and the upper end of the damping buffer cover is connected with the cylinder barrel.