CN215109800U - Cab turnover oil cylinder device - Google Patents

Abstract

In order to solve the problems of piston rod pull-off, large chassis impact, cab shake and the like in the cab turnover process, the utility model provides a cab turnover oil cylinder device, which mainly comprises a base, a cylinder barrel and a piston rod, wherein the base is fixedly connected to one end of the cylinder barrel, a lower fixed hole is arranged on the base, an oil inlet and an oil return port are arranged on the base, the cylinder barrel is far away from an opening at one end of the base, the piston rod is slidably connected to the inside of the cylinder barrel, one end of the piston rod, which is positioned at the outside of the cylinder barrel, is provided with an upper fixed hole, an axial limiting device is arranged between the piston rod and the inner wall, which is positioned at the opening of the cylinder barrel, the oil inlet is connected with a rod cavity through an oil pipe, a hydraulic control one-way valve is arranged between the base and the cylinder barrel, the oil return port is connected with a rodless cavity through the hydraulic control one-way valve, in addition, the oil inlet and the oil return port are both provided with a throttle valve, a self-limiting structure, a throttle valve, a hydraulic control one-way valve, a hydraulic control valve, The servo area improves the safety and the stability of the cab turnover system and simultaneously achieves the purposes of cost reduction and efficiency improvement.

Description

Cab turnover oil cylinder device

Technical Field

The utility model relates to the technical field of vehicles, in particular to driver's cabin upset hydro-cylinder device.

Background

At the present stage, heavy trucks are widely applied to the transportation industry, and in order to facilitate the work of maintaining engines and adding cooling liquid, heavy trucks are generally provided with a cab turnover system which is essential as a main member turnover oil cylinder device in the cab turnover system. However, the conventional cab-tilting system has the following disadvantages: 1. the safety of the turnover oil cylinder is not enough, an auxiliary limiting device is required to be additionally arranged to prevent the piston rod from being pulled off when the cab is turned, the product cost is high, and the occupied space is large. 2. The inside of the turnover oil cylinder has no following area, and the vertical displacement of the front suspension and the rear suspension of a cab during traveling can not be met by the structure of the oil cylinder. 3. In the process of overturning the cab, the phenomena of large impact on a chassis caused by the fact that the cab moves too fast after the cab is overturned over the gravity center, shaking of the cab during falling back, overlarge impact on a hydraulic lock at the rear suspension part of the cab during falling locking and the like exist, and the service life of related accessories is influenced.

Disclosure of Invention

In order to solve the problem, the utility model provides a driver's cabin upset hydro-cylinder device, the technical scheme of adoption as follows:

the utility model provides a driver's cabin upset hydro-cylinder device, its characterized in that mainly includes base, cylinder and piston rod, base fixed connection is provided with down fixed orifices, oil inlet and oil return opening in cylinder one end on the base, base one end opening is kept away from to the cylinder, and piston rod sliding connection is inside the cylinder, and the piston rod one end that is located the cylinder outside is provided with the fixed orifices to be provided with axial stop device between piston rod piston and the inner wall that is located the cylinder opening part, the oil inlet passes through oil pipe and has the pole chamber to link to each other, be provided with the liquid accuse check valve between base and the cylinder, the oil return opening passes through the liquid accuse check valve and links to each other with no pole chamber, in addition, oil inlet and oil return opening department all are provided with the choke valve.

Preferably, the axial limiting device comprises a bushing and a baffle ring sleeve, the bushing is fixedly connected to the inner wall of the opening of the cylinder barrel, the baffle ring sleeve is fixedly and coaxially fixedly connected to the outer surface of the piston rod, and the baffle ring sleeve is positioned on the piston rod on one side, close to the opening of the cylinder barrel, of the piston.

Preferably, the part of the cylinder barrel, which is close to the base, is a reducing follow-up area, and the inner diameter of the reducing follow-up area gradually decreases from the base to the opening direction of the cylinder barrel and is larger than the outer diameter of the piston.

Preferably, a piston anti-falling assembly used for placing the piston to fall off is arranged on the piston rod, and the piston anti-falling assembly is located on one side, close to the end face of the base, of the piston.

Preferably, one end of the opening of the cylinder barrel is also provided with a dust cover.

Preferably, the throttling valve at the oil return port is a floating type conical one-way throttling valve.

Preferably, the throttle valve at the oil inlet is a fixed throttle valve.

The beneficial effects of the utility model reside in that:

1. the throttle valve is arranged at the oil inlet to slow down the impact of the cab turning over the center of gravity on the chassis, and the throttle valve is arranged at the oil return port to play a role in throttling when the cab falls back, so that the cab falls back gently and the impact on the chassis is reduced;

2. the bottom of the cylinder barrel is provided with a reducing follow-up area, a rod cavity is communicated with a rodless cavity when the piston is in the reducing follow-up area, and a piston rod can float freely, so that the structure of the oil cylinder can meet the vertical displacement of the front and back suspensions of a cab during driving, and the driving comfort is improved;

3. an axial limiting device is arranged between the piston rod and the inner wall of the cylinder barrel to prevent the piston rod from being pulled off, and an anti-falling assembly is arranged on the piston rod at the bottom of the piston to prevent the piston rod from falling off due to the fact that the oil pressure of the rod cavity is increased instantaneously due to the influence of external force when a vehicle accident happens, so that the normal work of a cab turnover system is guaranteed.

Drawings

FIG. 1 is a schematic view of the structure of the present invention

FIG. 2 is a schematic view of the structure of the base and the cylinder

FIG. 3 is a schematic view of a piston rod structure

The hydraulic control anti-dropping device comprises a base 1, a lower fixing hole 101, an oil inlet 102, an oil return opening 103, a hydraulic control one-way valve 104, a hydraulic control one-way valve 105, a hydraulic control one-way valve core 106, an oil pipe, a cylinder barrel 2, a bushing 201, a steel wire retainer ring for hole 202, a dust cover 203, a variable diameter follow-up area 204, a piston rod 3, a piston anti-dropping assembly 301, a piston 302, a piston 303, a steel wire retainer ring for shaft 304, a retainer ring and an upper fixing hole 305.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The cab turnover oil cylinder device shown in fig. 1-3 mainly comprises a base 1, a cylinder barrel 2 and a piston rod 3, wherein the base 1 is fixedly connected to the left side of the cylinder barrel 2, the base 1 is provided with a lower fixing hole 101 fixedly connected with a frame through a pin shaft, the piston rod 3 is slidably connected to the right side of the cylinder barrel 2, the right end of the piston rod 3 extending out of the right end of the cylinder barrel 2 is provided with an upper fixing hole 305, the lower fixing hole 305 is connected with a cab body through a pin shaft, the base 1 is also provided with an oil inlet 102 and an oil outlet 103, the oil inlet 102 is provided with a fixed throttle valve, the oil outlet 103 is provided with a floating type conical one-way throttle valve, the oil inlet 102 is connected with a rod cavity through a metal oil pipe 106, a cavity is arranged between the base 1 and the cylinder barrel 2, the cavity is internally provided with a hydraulic control one-way valve 104, the oil outlet 103 is connected with a rodless cavity through the hydraulic control one-way valve 104, and the left part of the cylinder barrel 2 is a variable diameter following area 204, its internal diameter diminishes from the left hand right side gradually to the internal diameter is greater than the external diameter of piston 302, and 2 inner walls of cylinder 2 right-hand member is provided with bush 201 with steel wire retaining ring 202 for the clearing hole, and the right side of bush 201 is provided with dust cover 203, and dust cover 203 joint is in the right-hand member outside of cylinder 2, through axle steel wire retaining ring 303 fixedly connected with retaining ring cover 304 on the piston rod on piston 302 right side, the external diameter of retaining ring cover 304 is less than piston 302 external diameter and is greater than the external diameter of piston rod 3, and retaining ring cover 304 constitutes axial stop device jointly with bush 201 for carry out axial spacing to piston rod 3.

The working principle of the device is as follows: when the oil inlet 102 and the oil return port 103 stop supplying oil, the hydraulic control one-way valve 105 has the same oil pressure on two sides, the hydraulic control one-way valve 105 is fixed, the hydraulic control one-way valve 104 is conducted due to the oil pressure, hydraulic oil respectively enters the rod cavity and the rodless cavity, the lifting is realized through the annular area difference, when the oil inlet 102 and the oil return port 103 stop supplying oil, the oil pressure on two sides of the hydraulic control one-way valve 105 is reduced by the same amplitude, the hydraulic control one-way valve 104 returns to realize sealing and locking, and the piston rod 3 does not slide down; when the hydraulic oil falls back, the hydraulic oil enters the rod cavity through the oil inlet 102, the oil return port 103 stops supplying the oil, at the moment, the hydraulic control check valve core 105 pushes the steel ball of the hydraulic control check valve 104, the hydraulic control check valve 104 is conducted, the hydraulic oil in the rodless cavity flows out through the oil return port 103 to realize the falling back of the cab, when the oil inlet 102 and the oil return port both stop supplying the oil, the hydraulic control check valve 104 is forced to return to cause the hydraulic control check valve core 105 to return to realize the sealing locking, the piston rod 3 does not slide down, when the cab is overturned to the limit position, the piston rod 3 has the longest distance to the right side of the cylinder barrel 2, the bush 201 is contacted with the baffle ring 304 to realize the limit, the piston rod 3 is prevented from being pulled off, the piston anti-off component 301 on the left side of the piston 302 is provided with a plurality of snap springs to axially limit the piston 302, the rod cavity oil pressure of the oil cylinder is prevented from increasing the piston 302 due to the influence of the piston rod 3 by external force when the vehicle accident, the normal work of the cab turnover system is ensured.

When the oil inlet 102 is fixed, the throttle valve plays a role in throttling and slowing, the movement speed of the cab can be slowed down when the cab is overturned over the center of gravity, the cab is ensured to be stably overturned, the floating type conical one-way valve at the oil return port 103 does not work when the cab is lifted, and when the cab falls back, the throttle valve plays a role in one-way throttling and slowing, so that the problems of body shaking and large-amplitude impact on a hydraulic lock when the cab falls back are solved; the variable diameter follow-up area 204 is arranged in the cylinder barrel 2, a rod cavity is communicated with a rodless cavity when the piston 302 is in the variable diameter follow-up area 204, and the piston rod 3 can float freely, so that the vertical displacement of the front and back suspensions of a cab during driving can be met by the structure of the oil cylinder during driving, and the driving comfort level is improved.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements can be made, and these improvements should also be regarded as the protection scope of the present invention.

Claims (7)

1. The utility model provides a driver's cabin upset hydro-cylinder device, its characterized in that mainly includes base, cylinder and piston rod, base fixed connection is provided with down fixed orifices, oil inlet and oil return opening in cylinder one end on the base, base one end opening is kept away from to the cylinder, and piston rod sliding connection is inside the cylinder, and the piston rod one end that is located the cylinder outside is provided with the fixed orifices to be provided with axial stop device between piston rod piston and the inner wall that is located the cylinder opening part, the oil inlet passes through oil pipe and has the pole chamber to link to each other, be provided with the liquid accuse check valve between base and the cylinder, the oil return opening passes through the liquid accuse check valve and links to each other with no pole chamber, in addition, oil inlet and oil return opening department all are provided with the choke valve.

2. The cab turnover cylinder device of claim 1, wherein the axial limiting device comprises a bushing and a retainer ring, the bushing is fixedly connected to the inner wall of the opening of the cylinder, the retainer ring is fixedly and coaxially fixedly connected to the outer surface of the piston rod, and the retainer ring is located on the piston rod on one side of the piston close to the opening of the cylinder.

3. The cab turnover cylinder device of claim 1, wherein the portion of the cylinder barrel near the base is a reducing follow-up area, and the inner diameter of the reducing follow-up area gradually decreases from the base to the opening of the cylinder barrel and is larger than the outer diameter of the piston.

4. The cab turnover cylinder device according to claim 1, wherein a piston anti-drop assembly for placing the piston drop is provided on the piston rod, and the piston anti-drop assembly is located on one side of the end surface of the piston close to the base.

5. The cab-tilting cylinder device as claimed in claim 1, wherein a dust cover is further provided at an open end of the cylinder.

6. The cab-roll over cylinder apparatus of claim 1, wherein the throttle valve at the oil return port is a floating tapered one-way throttle valve.

7. The cab-roll over cylinder apparatus according to claim 1, wherein the throttle valve at the fuel inlet is a fixed throttle valve.

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