CN214221666U

CN214221666U - Pressure-adjustable follow-up hydraulic cylinder

Info

Publication number: CN214221666U
Application number: CN202023013260.2U
Authority: CN
Inventors: 岳会涛
Original assignee: Shijiazhuang Luancheng Xiangtai Technology Co ltd
Current assignee: Shijiazhuang Luancheng Xiangtai Technology Co ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-09-17
Anticipated expiration: 2030-12-15

Abstract

The utility model relates to a pneumatic cylinder technical field especially relates to an adjustable pressure is with following type pneumatic cylinder. Include the distribution seat is fixed to be set up in below ring flange bottom, be provided with the control oilhole between main oil gallery and the main drive oil groove, control oilhole and vice drive oil groove and vice oil gallery intercommunication, the inside valve rod that is provided with of control oilhole for the switching of control vice oil gallery and vice drive oil groove, control oilhole right-hand member is provided with set screw, and the left end is provided with adjusting screw for the maximum pressure of adjusting hydraulic cylinder, be provided with the spring between adjusting screw and the valve rod left end, can promote the valve rod and remove to the left side when pneumatic cylinder pressure is too big, thereby make vice drive oil port closed, vice oil gallery is opened, and hydraulic drive motor need not to shut down to operate with low load state, make motor life increase, total power consumption reduce.

Description

Pressure-adjustable follow-up hydraulic cylinder

Technical Field

The utility model relates to a pneumatic cylinder technical field especially relates to an adjustable pressure is with following type pneumatic cylinder.

Background

Traditional squeezer oil cylinder is after reaching certain pressure, is closed the power by solenoid valve control, opens the solenoid valve after the pressure reduction and restarts the motor, will frequently start the motor like this to it is the belt load start, the electric current needs very big when the motor starts, the belt load start can make motor life shorten, takes place to burn out the motor phenomenon easily when using for a long time, and the frequent switching of motor, power consumption is higher. Therefore, a need exists for a cylinder with pressure control system that shuts off the inlet when the pressure reaches an upper limit, returns the oil to the tank along the return line without pressure, does not require the motor to be shut down, and operates at a low load condition.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the technical deficiency exists is solved, and an adjustable pressure follow-up hydraulic cylinder is provided, which comprises a distribution seat fixedly arranged at the bottom of a flange plate below, a control oil hole is arranged between a main oil return groove and a main drive oil groove, the control oil hole is communicated with an auxiliary drive oil groove and an auxiliary oil return groove, a valve rod is arranged inside the control oil hole and used for controlling the opening and closing of the auxiliary oil return groove and the auxiliary drive oil groove, a fixing screw is arranged at the right end of the control oil hole, an adjusting screw is arranged at the left end and used for adjusting the maximum pressure of the hydraulic cylinder, a spring is arranged between the adjusting screw and the left end of the valve rod, when the pressure of the hydraulic cylinder is overlarge, the valve rod is pushed to move to the left side, so that the auxiliary drive oil port is closed, the auxiliary oil return port is opened, the hydraulic drive motor does not need to be stopped and runs in a low-load state, and the service life of the motor is prolonged, the total power consumption is reduced.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: comprises a hydraulic oil cylinder and a distribution seat; a hydraulic push rod is arranged in the middle of the hydraulic oil cylinder; flanges are arranged at two ends of the hydraulic oil cylinder; a gland is fixedly arranged on the upper flange plate; a piston is arranged at the bottom of the hydraulic push rod in the hydraulic oil cylinder; the distribution seat is fixedly arranged at the bottom of the lower flange plate; a hydraulic oil driving interface is arranged above one side of the hydraulic oil cylinder and on the distribution seat; and an oil return port is arranged below the left side of the distribution seat.

Further optimizing the technical scheme, a main driving oil groove is arranged on the right side below the distribution seat in the horizontal direction; the right end of the main driving oil groove is communicated with a hydraulic oil driving interface; an auxiliary driving oil groove is arranged above the middle part of the main driving oil groove; the main driving oil groove is communicated with the interior of the hydraulic oil cylinder through an auxiliary driving oil groove.

Further optimizing the technical scheme, an auxiliary oil return groove is arranged above the left end of the main driving oil groove; a main oil return groove is formed in the left side of the auxiliary oil return groove; the main driving oil groove is communicated with the oil return port through the auxiliary oil return groove and the main oil return groove.

Further optimizing the technical scheme, a control oil hole is formed between the main oil return groove and the main driving oil groove; the control oil hole is communicated with the auxiliary driving oil groove and the auxiliary oil return groove; and a valve rod is arranged in the control oil hole and used for controlling the opening and closing of the auxiliary oil return groove and the auxiliary driving oil groove.

Further optimizing the technical scheme, a fixing screw is arranged at the right end of the control oil hole; the left end is provided with an adjusting screw used for adjusting the maximum pressure of the hydraulic cylinder; and a spring is arranged between the adjusting screw and the left end of the valve rod.

Further optimizing the technical scheme, two groups of annular grooves are arranged on the valve rod; the distance between the two annular grooves is equal to the distance between the auxiliary oil return groove and the auxiliary driving oil groove.

Further optimizing the technical scheme, the right end of the valve rod is provided with a sealing disc; a boss is arranged in the middle of the right end of the sealing disc; the boss periphery is provided with a plurality of through-holes on sealed dish.

Compared with the prior art, the utility model has the advantages of it is following:

1. the distribution seat is fixedly arranged at the bottom of the flange plate below, a control oil hole is formed between the main oil return groove and the main driving oil groove, the control oil hole is communicated with the auxiliary driving oil groove and the auxiliary oil return groove, and a valve rod is arranged in the control oil hole and used for controlling the opening and closing of the auxiliary oil return groove and the auxiliary driving oil groove.

2. The right end of the control oil hole is provided with a fixing screw, the left end of the control oil hole is provided with an adjusting screw for adjusting the maximum pressure of the hydraulic cylinder, the maximum limit pressure of the hydraulic cylinder can be freely adjusted by rotating the adjusting screw on one side, a hydraulic pressure limiting valve does not need to be independently installed in a hydraulic system, and the hydraulic pressure limiting valve is convenient to use.

3. Can promote the valve stem and remove to the left side when pneumatic cylinder pressure is too big to make vice drive hydraulic fluid port closed, vice oil return opening is opened, the hydraulic drive motor need not to shut down, and with the operation of low load state, make motor life increase, total power consumption reduces.

4. When the pressure of the hydraulic cylinder is small, the valve rod moves to the right side under the pushing of the spring, the auxiliary driving oil groove is opened, and the oil return groove is closed.

Drawings

Fig. 1 is a perspective view of a pressure-adjustable follow-up hydraulic cylinder.

FIG. 2 is a schematic diagram of an open state of an auxiliary drive oil sump of a variable pressure follow-up hydraulic cylinder.

Fig. 3 is a partial sectional view of an open state of a sub-drive oil groove of a variable pressure follow-up hydraulic cylinder.

Fig. 4 is a schematic diagram illustrating an open state of a secondary oil gallery of a pressure-adjustable follow-up hydraulic cylinder.

In the figure: 1. a hydraulic cylinder; 101. a hydraulic push rod; 102. a flange plate; 103. a gland; 104. a piston; 2. a dispensing seat; 201. a main drive oil sump; 202. an auxiliary drive oil groove; 203. a secondary oil return groove; 204. a main oil return groove; 205. a control oil hole; 3. a hydraulic oil drive interface; 4. an oil return port; 5. a valve stem; 501. an annular groove; 502. sealing the disc; 503. a boss; 504. a through hole; 6. a set screw; 7. an adjusting screw; 8. a spring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

The first embodiment is as follows: with reference to fig. 1 to 4, a pressure-adjustable follow-up hydraulic cylinder is characterized in that: comprises a hydraulic oil cylinder 1 and a distribution base 2; a hydraulic push rod 101 is arranged in the middle of the hydraulic oil cylinder 1; two ends of the hydraulic oil cylinder 1 are both provided with flange plates 102; a gland 103 is fixedly arranged on the upper flange plate 102; a piston 104 is arranged at the bottom of a hydraulic push rod 101 in the hydraulic oil cylinder 1; the distribution base 2 is fixedly arranged at the bottom of the lower flange plate 102; a hydraulic oil driving interface 3 is arranged above one side of the hydraulic oil cylinder 1 and on the distribution base 2; an oil return opening 4 is formed in the lower portion of the left side of the distribution seat 2.

Preferably, a main driving oil groove 201 is arranged on the right side below the distribution base 2 in the horizontal direction; the right end of the main driving oil groove 201 is communicated with the hydraulic oil driving interface 3; an auxiliary driving oil groove 202 is arranged above the middle part of the main driving oil groove 201; the main driving oil groove 201 is communicated with the interior of the hydraulic oil cylinder 1 through an auxiliary driving oil groove 202.

Preferably, an auxiliary oil return groove 203 is arranged above the left end of the main driving oil groove 201; a main oil return groove 204 is formed in the left side of the auxiliary oil return groove 203; the main driving oil groove 201 and the oil return port 4 are communicated with a main oil return groove 204 through a secondary oil return groove 203.

Preferably, a control oil hole 205 is formed between the main oil return groove 204 and the main driving oil groove 201; the control oil hole 205 is communicated with the auxiliary driving oil groove 202 and the auxiliary oil return groove 203; a valve rod 5 is arranged in the control oil hole 205 and used for controlling the opening and closing of the secondary oil return groove 203 and the secondary driving oil groove 202.

Preferably, a fixing screw 6 is arranged at the right end of the control oil hole 205; the left end is provided with an adjusting screw 7 for adjusting the maximum pressure of the hydraulic cylinder; a spring 8 is arranged between the adjusting screw 7 and the left end of the valve rod 5.

Preferably, two sets of annular grooves 501 are arranged on the valve rod 5; the distance between the two annular grooves 501 is equal to the distance between the secondary oil return groove 203 and the secondary drive oil groove 202.

Preferably, the right end of the valve rod 5 is provided with a sealing disc 502; a boss 503 is arranged in the middle of the right end of the sealing disc 502; the boss 503 is provided with a plurality of through holes 504 on the outer periphery of the seal plate 502.

When the hydraulic oil cylinder is used, in a first step, as shown in fig. 1-4, in a normal use state of the hydraulic oil cylinder 1, hydraulic oil enters below the auxiliary driving oil groove 202 through the main driving oil groove 201, then enters inside the hydraulic oil cylinder 1 through the right annular groove 501 and the upper side of the auxiliary driving oil groove 202, and finally pushes the piston 104 to ascend; in this process, the left annular groove 501 is sealed by the inner wall of the control oil hole 205, and the secondary oil return groove 203 is closed by the valve rod 5.

When the internal pressure of the hydraulic oil cylinder 1 is high, a sealing disc 502 is arranged at the right end of the valve rod 5, a boss 503 is arranged in the middle of the right end of the sealing disc 502, a plurality of through holes 504 are formed in the periphery of the boss 503 on the sealing disc 502, the valve rod 5 moves leftwards under the pushing of hydraulic oil, so that the two annular grooves 501 and the sealing disc 502 are driven to move leftwards together, when the sealing disc 502 is overlapped with the auxiliary driving oil groove 202, the left annular groove 501 is overlapped with the auxiliary oil return groove 203, the hydraulic oil can enter the lower part of the auxiliary oil return groove 203 through the main driving oil groove 201, then enters the main oil return groove 204 from the upper part of the auxiliary oil return groove 203 through the left annular groove 501, and finally flows back to the oil tank from the oil return port 4; the hydraulic drive motor does not need to be stopped and operates in a low-load state, so that the service life of the motor is prolonged, and the total power consumption is reduced.

Step two, as shown in fig. 1 to 4, when the internal pressure of the hydraulic cylinder 1 is low, the valve rod 5 is pushed to move to the right side under the elastic force of the spring 8, so that the auxiliary oil return groove 203 is closed, the auxiliary driving oil groove 202 is opened, and the hydraulic oil flows into the hydraulic cylinder 1 through the auxiliary driving oil groove 202 to supplement the pressure.

When the adjusting screw 7 on the left side is rotated, the adjusting screw 7 can compress the spring 8, so that the opening resistance of the valve rod 5 towards the left side is increased, and the maximum limit pressure of the hydraulic cylinder is increased; the maximum limit pressure of the hydraulic cylinder can be freely adjusted by rotating the adjusting screw 7 on one side, a hydraulic pressure limiting valve does not need to be independently installed in a hydraulic system, and the hydraulic pressure limiting valve is convenient to use.

The hydraulic cylinders with different pressure limits can be used in the same hydraulic system, a hydraulic pressure limiting device does not need to be independently installed on a hydraulic cylinder pipeline, and when hydraulic oil reflows after the hydraulic cylinders exceed the corresponding pressure ranges, the work of other hydraulic cylinders cannot be influenced.

The utility model discloses a control mode comes automatic control through the controller, and the control circuit of controller can realize through the simple programming of technical staff in this field, belongs to the common general knowledge in this field, and the utility model discloses mainly be used for protecting mechanical device, so the utility model discloses no longer explain control mode and circuit connection in detail.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. The utility model provides a follow-up type pneumatic cylinder can adjust pressure which characterized in that: comprises a hydraulic oil cylinder (1) and a distribution seat (2); a hydraulic push rod (101) is arranged in the middle of the hydraulic oil cylinder (1); two ends of the hydraulic oil cylinder (1) are provided with flange plates (102); a gland (103) is fixedly arranged on the upper flange plate (102); a piston (104) is arranged at the bottom of the hydraulic push rod (101) in the hydraulic oil cylinder (1); the distribution base (2) is fixedly arranged at the bottom of the lower flange plate (102); a hydraulic oil driving interface (3) is arranged above one side of the hydraulic oil cylinder (1) and on the distribution seat (2); an oil return opening (4) is formed in the lower portion of the left side of the distribution seat (2).

2. A pressure-adjustable follow-up hydraulic cylinder as claimed in claim 1, wherein: a main driving oil groove (201) is arranged on the right side below the distribution seat (2) in the horizontal direction; the right end of the main driving oil groove (201) is communicated with the hydraulic oil driving interface (3); an auxiliary driving oil groove (202) is arranged above the middle part of the main driving oil groove (201); the main driving oil groove (201) is communicated with the interior of the hydraulic oil cylinder (1) through an auxiliary driving oil groove (202).

3. A pressure-adjustable follow-up hydraulic cylinder as claimed in claim 2, wherein: an auxiliary oil return groove (203) is formed above the left end of the main driving oil groove (201); a main oil return groove (204) is formed in the left side of the auxiliary oil return groove (203); the main driving oil groove (201) is communicated with the oil return port (4) through an auxiliary oil return groove (203) and a main oil return groove (204).

4. A pressure-adjustable follow-up hydraulic cylinder as claimed in claim 3, wherein: a control oil hole (205) is formed between the main oil return groove (204) and the main driving oil groove (201); the control oil hole (205) is communicated with the auxiliary driving oil groove (202) and the auxiliary oil return groove (203); and a valve rod (5) is arranged in the control oil hole (205) and is used for controlling the opening and closing of the auxiliary oil return groove (203) and the auxiliary driving oil groove (202).

5. A pressure-adjustable follow-up hydraulic cylinder as claimed in claim 4, wherein: a fixing screw (6) is arranged at the right end of the control oil hole (205); the left end is provided with an adjusting screw (7) for adjusting the maximum pressure of the hydraulic cylinder; and a spring (8) is arranged between the adjusting screw (7) and the left end of the valve rod (5).

6. A pressure-adjustable follow-up hydraulic cylinder as claimed in claim 4, wherein: two groups of annular grooves (501) are arranged on the valve rod (5); the distance between the two annular grooves (501) is smaller than the distance between the auxiliary oil return groove (203) and the auxiliary driving oil groove (202).

7. A pressure-adjustable follow-up hydraulic cylinder as claimed in claim 4, wherein: a sealing disc (502) is arranged at the right end of the valve rod (5); a boss (503) is arranged in the middle of the right end of the sealing disc (502); the periphery of the boss (503) is provided with a plurality of through holes (504) on the sealing disc (502).