CN221973958U - Electro-hydraulic actuator with composite buffer structure - Google Patents

Abstract

The utility model discloses an electrohydraulic actuator with a composite buffer structure, which comprises an outer shell body with a square structure, wherein a hydraulic pump is fixedly arranged on the outer surface of the outer shell body, a telescopic oil cylinder is fixedly arranged in the outer shell body, the action of the electrohydraulic actuator is realized by utilizing the operation of the telescopic oil cylinder, and the telescopic oil cylinder is communicated with an electromagnetic valve fixedly arranged in the outer shell body through a connecting pipeline; the front end of the outer shell is internally provided with a buffer mechanism, and the elastic function of the buffer mechanism is utilized to buffer and protect the telescopic cylinder when the telescopic cylinder stretches to the maximum formation. This electro-hydraulic actuator with compound buffer structure adopts novel structural design, through buffer structure's use, when flexible hydro-cylinder stretches out and draws back to the biggest or minimum stroke, strikes between the buffer block to drive buffer block synchronous movement, buffer block drives buffer spring compression or stay cord this moment, utilizes buffer spring's elasticity effect to reach the purpose of buffering protection.

Description

An electro-hydraulic actuator with a composite buffer structure

Technical Field

The utility model relates to the technical field of electro-hydraulic actuators, in particular to an electro-hydraulic actuator with a composite buffer structure.

Background Art

The electro-hydraulic actuator is a device that works through hydraulic pressure and is widely used in the field of mechanical production. Its main principle is to use electric energy to drive the motor to rotate, so that the motor drives the hydraulic pump to work, and the hydraulic pressure generated by the hydraulic pump drives the telescopic unit to work.

In the prior art, a Chinese patent with the authorization announcement number CN206468618U discloses a linear lightweight electro-hydraulic actuator, which includes a main housing, a bidirectional rotary electromagnetic pump, a valve group, and a single-piston rod hydraulic cylinder as an actuator. The bidirectional rotary electromagnetic pump is arranged at the rear of the main housing, and its oil inlet and outlet are connected to the two oil inlets of the valve group. The single-piston rod hydraulic cylinder is arranged at the front end of the main housing. The two oil outlets of the valve group are respectively connected to a hard pipe pipeline and a hose pipeline. The hard pipe pipeline is connected to the rodless cavity of the single-piston rod hydraulic cylinder, and the hose pipeline is connected to the rod cavity of the single-piston rod hydraulic cylinder. The utility model places the electro-hydraulic actuator system in a cylindrical housing, which has a compact structure, small size, light weight, high power density, is easy to integrate with other equipment products, is light and reliable, and provides new ideas for applications in the field of robots.

The above-mentioned device completes its action through the extension and retraction of the hydraulic cylinder. However, during actual use, when the hydraulic cylinder is extended and retracted to the maximum stroke, its movable end will cause an impact on the hydraulic cylinder or the device as a whole. Therefore, if there is no buffer structure during repeated use, the device will be damaged prematurely and its service life will be shortened.

Utility Model Content

The utility model aims to provide an electro-hydraulic actuator with a composite buffer structure to solve the problem in the background art that the telescopic impact of the action unit shortens the service life of the device.

To achieve the above-mentioned purpose, the utility model provides the following technical solution: an electro-hydraulic actuator with a composite buffer structure, comprising an outer shell in a square structure, and further comprising:

A hydraulic pump is fixedly installed on the outer surface of the outer shell, and a telescopic oil cylinder is fixedly installed inside the outer shell, and the action of the electro-hydraulic actuator is realized by the operation of the telescopic oil cylinder, and the telescopic oil cylinder is connected to a solenoid valve fixedly installed inside the outer shell through a connecting pipe;

A buffer mechanism is installed inside the front end of the outer shell, and the elastic effect of the buffer mechanism is used to buffer and protect the telescopic cylinder when it is extended to the maximum.

A heat dissipation mechanism is arranged inside the bottom end of the outer shell, and the heat dissipation mechanism is used to dissipate heat from the hydraulic pump during operation to ensure the normal operation of the device.

Preferably, the buffer mechanism comprises a buffer block slidably connected to the outer shell, and a buffer spring is fixedly installed between the buffer block and the outer shell.

Preferably, magnetic blocks are symmetrically installed at the upper and lower ends of the buffer block, and a locking block is fixedly installed on the outer surface of the magnetic block, and a reset spring is fixedly installed between the magnetic block and the inner wall of the buffer block.

Preferably, a first magnetic strip and a second magnetic strip are fixedly mounted on the outer surface of the movable end of the telescopic cylinder, and the magnetic properties of the first magnetic strip are the same as the magnetic poles between the magnetic blocks.

Preferably, a snap-fitting hole is provided in the middle of the second magnetic strip to form a snap-fitting structure with the snap-fitting block, and the magnetic poles of the second magnetic strip and the magnetic block are opposite.

Preferably, the heat dissipation mechanism comprises a heat dissipation hole externally arranged on the rear end surface of the outer shell and a heat dissipation fan rotatably installed inside the outer shell.

Preferably, a longitudinally placed drive motor is fixedly installed inside the outer shell, and the drive motor drives the cooling fan to rotate through a belt, and a driving bevel gear is fixedly installed on the output end of the drive motor, and the side of the driving bevel gear is meshedly connected with a driven bevel gear that drives the hydraulic pump to work.

Compared with the prior art, the utility model has the beneficial effect that: the electro-hydraulic actuator is provided with a composite buffer structure.

1. Through the use of the buffer mechanism, when the telescopic cylinder is extended to the maximum or minimum stroke, it collides with the buffer block, thereby driving the buffer block to move synchronously. At this time, the buffer block drives the buffer spring to compress or pull the rope, and the elastic effect of the buffer spring is used to achieve the purpose of buffer protection.

2. The magnetic block, the first magnetic strip and the second magnetic strip are used in coordination. When the telescopic cylinder is working, the repulsive force between the first magnetic strip and the magnetic block is used to push the magnetic block outward. When the magnetic block moves to the second magnetic strip corresponding to the magnetic block, the magnetic attraction is used to move the engaging block on the outer surface of the magnetic block to a position engaged with the engaging hole.

3. Through the coordinated use of the hydraulic pump, the solenoid valve and the connecting pipe, the hydraulic oil is pumped into the telescopic cylinder through the connecting pipe by the operation of the hydraulic pump, thereby controlling the telescopic action of the telescopic cylinder.

4. Through the use of the heat dissipation mechanism, the driving motor inside the outer shell drives the cooling fan to rotate through the belt, thereby generating airflow, and cooperating with the heat dissipation holes opened throughout to achieve the purpose of effectively dissipating the heat of the hydraulic pump.

5. Through the coordinated use of the active bevel gear and the driven bevel gear, the driving motor drives the active bevel gear fixed on its top to rotate synchronously during the rotation process. At this time, the driven bevel gear meshing with the active bevel gear drives the hydraulic pump to work.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic diagram of the overall structure of the utility model;

Figure 2 is a schematic diagram of the cross-sectional structure of the outer shell of the utility model;

FIG3 is a schematic diagram of the cross-sectional structure of the buffer block of the utility model;

FIG4 is a schematic diagram of the connection structure between the telescopic cylinder and the buffer block of the utility model;

Figure 5 is a schematic diagram of the structure of the connection state between the magnetic block and the telescopic cylinder of the utility model;

FIG. 6 is a schematic diagram of the heat dissipation fan driving structure of the present invention.

In the figure: 1. outer shell; 2. hydraulic pump; 3. telescopic cylinder; 4. solenoid valve; 5. connecting pipe; 6. buffer block; 7. magnetic block; 8. engaging block; 9. reset spring; 10. first magnetic strip; 11. second magnetic strip; 12. engaging hole; 13. buffer spring; 14. heat dissipation hole; 15. cooling fan; 16. driving motor; 17. active bevel gear; 18. driven bevel gear.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Please refer to Figures 1 to 6. The utility model provides a technical solution: an electro-hydraulic actuator with a composite buffer structure.

Embodiment 1: This embodiment discloses: an outer shell 1 with a square structure, and also includes: a hydraulic pump 2 is fixedly installed on the outer surface of the outer shell 1, and a telescopic cylinder 3 is fixedly installed inside the outer shell 1, the action of the electro-hydraulic actuator is realized by the operation of the telescopic cylinder 3, and the telescopic cylinder 3 is connected to the solenoid valve 4 fixedly installed inside the outer shell 1 through a connecting pipe 5, and an active bevel gear 17 is fixedly installed on the output end of the driving motor 16, and the side of the active bevel gear 17 is meshedly connected with a driven bevel gear 18 that drives the hydraulic pump 2 to work.

When using the device, first install the device as a whole between the mechanical equipment, then turn on the drive motor 16 inside the outer shell 1, and use the drive motor 16 to drive the active bevel gear 17 to rotate. At this time, the driven bevel gear 18 meshing with the active bevel gear 17 drives the hydraulic pump 2 to work, and under the control of the solenoid valve 4, the hydraulic oil is pumped into the telescopic cylinder 3 through the connecting pipe 5 to achieve the extension and retraction of the telescopic cylinder 3.

Embodiment 2: This embodiment is disclosed on the basis of embodiment 1: a buffer mechanism is installed inside the front end of the outer shell 1, and the elastic action of the buffer mechanism is used to buffer and protect the telescopic cylinder 3 when it is extended to the maximum; the buffer mechanism includes a buffer block 6 slidably connected to the outer shell 1, a buffer spring 13 is fixedly installed between the buffer block 6 and the outer shell 1, magnetic blocks 7 are symmetrically installed at the upper and lower ends of the buffer block 6, and a locking block 8 is fixedly installed on the outer surface of the magnetic block 7, and a reset spring 9 is fixedly installed between the magnetic block 7 and the inner wall of the buffer block 6, a first magnetic strip 10 and a second magnetic strip 11 are fixedly installed on the outer surface of the movable end of the telescopic cylinder 3, and the magnetism of the first magnetic strip 10 is the same as the magnetic pole between the magnetic block 7, and a locking hole 12 is opened in the middle position of the second magnetic strip 11 to form a locking structure with the locking block 8, and the magnetic poles of the second magnetic strip 11 and the magnetic block 7 are opposite.

By adding the above structure, when the telescopic cylinder 3 is extended, the magnetic block 7 inside the early buffer block 6 corresponds to the first magnetic strip 10, and the magnetic repulsion between the two is used to make the magnetic block 7 move away from the telescopic cylinder 3. When the telescopic cylinder 3 is extended to the maximum stroke, the magnetic block 7 corresponds to the second magnetic strip 11, and the magnetic attraction between the two makes the magnetic block 7 approach the telescopic cylinder 3, and finally the engaging block 8 outside the magnetic block 7 moves to a position engaged and fixed with the engaging hole 12, so that the telescopic cylinder 3 drives the buffer block 6 to move synchronously, and finally the buffer block 6 stretches the buffer spring 13, and the elastic effect of the buffer spring 13 is used to achieve the purpose of buffering protection for the entire device.

Embodiment 3: This embodiment is disclosed on the basis of Embodiment 1 and Embodiment 2: A heat dissipation mechanism is arranged inside the bottom end of the outer shell 1, and the heat dissipation mechanism is used to dissipate heat from the hydraulic pump 2 during operation to ensure the normal operation of the device. The heat dissipation mechanism includes a heat dissipation hole 14 externally arranged on the rear end surface of the outer shell 1 and a heat dissipation fan 15 rotatably installed inside the outer shell 1. A longitudinally placed drive motor 16 is fixedly installed inside the outer shell 1, and the drive motor 16 drives the heat dissipation fan 15 to rotate through a belt.

By adding the above structure, when the driving motor 16 is working, the cooling fan 15 is driven by the belt to rotate, and the cooling holes 14 opened on the outer shell 1 are cooperated to realize the flow of gas, so as to achieve the purpose of cooling the hydraulic pump 2.

In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. An electro-hydraulic actuator with composite buffer structure, including being square structural shell body (1), its characterized in that still includes:

the hydraulic pump (2) is fixedly arranged on the outer surface of the outer shell (1), the telescopic oil cylinder (3) is fixedly arranged in the outer shell (1), the action of the electro-hydraulic actuator is realized by utilizing the operation of the telescopic oil cylinder (3), and the telescopic oil cylinder (3) is communicated with the electromagnetic valve (4) fixedly arranged in the outer shell (1) through the connecting pipeline (5);

A buffer mechanism is arranged in the front end of the outer shell (1), and the telescopic cylinder (3) which stretches to the maximum formation is buffered and protected by the elastic action of the buffer mechanism;

The hydraulic pump (2) in the working process is radiated by the radiating mechanism, so that the normal operation of the device is ensured.

2. The electro-hydraulic actuator with a composite buffer structure of claim 1, wherein: the buffering mechanism comprises a buffering block (6) which is in sliding connection with the outer shell (1), and a buffering spring (13) is fixedly arranged between the buffering block (6) and the outer shell (1).

3. The electro-hydraulic actuator with a composite buffer structure of claim 2, wherein: magnetic blocks (7) are symmetrically arranged at the upper end and the lower end of the inside of the buffer block (6), clamping blocks (8) are fixedly arranged on the outer surface of the magnetic blocks (7), and reset springs (9) are fixedly arranged between the magnetic blocks (7) and the inner wall of the buffer block (6).

4. An electro-hydraulic actuator with a composite damping structure according to claim 3, wherein: the outer surface of the movable end of the telescopic oil cylinder (3) is fixedly provided with a first magnetic stripe (10) and a second magnetic stripe (11), and the magnetic poles between the magnetism of the first magnetic stripe (10) and the magnetic block (7) are the same.

5. The electro-hydraulic actuator with a composite damping structure according to claim 4, wherein: and a clamping hole (12) which forms a clamping structure with the clamping block (8) is formed in the middle of the second magnetic stripe (11), and the magnetic poles between the second magnetic stripe (11) and the magnetic block (7) are opposite.

6. The electro-hydraulic actuator with a composite buffer structure of claim 1, wherein: the heat dissipation mechanism comprises a heat dissipation hole (14) arranged on the rear end surface of the outer shell (1) in a peripheral mode and a heat dissipation fan (15) rotatably arranged inside the outer shell (1).

7. The electro-hydraulic actuator with a composite damping structure according to claim 6, wherein: the driving motor (16) is fixedly arranged in the outer shell (1), the driving motor (16) drives the cooling fan (15) to rotate through a belt, a driving bevel gear (17) is fixedly arranged at the output end of the driving motor (16), and a driven bevel gear (18) for driving the hydraulic pump (2) to work is connected to the side face of the driving bevel gear (17) in a meshed mode.