CN211778306U - Hydraulic servo actuator with built-in displacement sensor structure - Google Patents

Abstract

The utility model discloses a hydraulic pressure servo actuator of built-in displacement sensor structure, including actuator cylinder body, servo control valves, the articulated assembly of back ball, preceding ball hinge assembly and force sensor, the articulated assembly of back ball is connected to actuator cylinder body rear end, and first crack ring that disappears is connected to actuator cylinder body front end, through the bolt fastening force sensor on the sensor flange, the second crack ring that disappears is connected to the force sensor front end, servo control valves includes valve plate, transition valve piece, energy storage ware, servo valve and ooff valve group, installs servo valve on the transition valve piece, and the energy storage ware is installed to the valve plate both sides. This hydraulic pressure servo actuator of built-in displacement sensor structure, displacement sensor install inside the cylinder body, and the structure is exquisite, and displacement sensor has received effectual protection, has avoided external force to displacement sensor's destruction, has completely cut off external dust and greasy dirt, has improved displacement sensor's protection level, has prolonged the life of sensor.

Description

Hydraulic servo actuator with built-in displacement sensor structure

Technical Field

The utility model relates to an automotive technology research and development and experimental field specifically are a hydraulic servo actuator of built-in displacement sensor structure.

Background

At present in the automobile field, along with the continuous development of society, the continuous progress of science and technology, the model kind of car is more and more, and the hydraulic servo actuator who is applied to car test equipment has also had more and more demand, and the servo actuator most of domestic most production all is external displacement sensor, and external displacement sensor is because the outer actuator that leaks in, so often can receive unexpected damage, leads to servo actuator position accuracy to descend, damages even, frequently changes the sensor.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem lie in overcoming the problem that the background art provided, provide a hydraulic pressure servo actuator of built-in displacement sensor structure.

In order to achieve the above object, the utility model provides a following technical scheme: a hydraulic servo actuator with a built-in displacement sensor structure comprises an actuator cylinder body, a servo control valve group, a rear ball hinge assembly, a front ball hinge assembly and a force sensor, wherein the rear end of the actuator cylinder body is connected with the rear ball hinge assembly, the servo control valve group is arranged above the actuator cylinder body through screws, the front end of the actuator cylinder body is connected with a first anti-backlash ring, the front end of the actuator cylinder body is connected with a sensor connecting flange through the self-locking effect of the first anti-backlash ring, the force sensor is fixed on the sensor connecting flange through bolts, the front end of the force sensor is connected with a second anti-backlash ring, the second anti-backlash ring is fixed on the front ball hinge assembly through bolts, the rear end inside the actuator cylinder body is provided with the displacement sensor, and a sensor plug is arranged on the actuator cylinder body at the rear end;

the servo control valve group comprises a valve plate, a transition valve block, an energy accumulator, a servo valve and a switch valve group, wherein the transition valve block is arranged in the middle of the upper portion of the valve plate, the servo valve is arranged on the transition valve block, the switch valve group is arranged on the valve plate on the side face of the transition valve block, and the energy accumulator is arranged on two sides of the valve plate.

Preferably, the piston rod that the inside setting of actuator cylinder body is connected displacement sensor, and displacement sensor installs inside the actuator cylinder body to displacement sensor and the sensor plug connection of actuator cylinder body side setting.

Preferably, the connecting bolt of preceding ball hinge assembly front side installation that actuator cylinder body both sides set up, and connecting bolt pass the second anti-backlash ring front end and fix on force sensor, the ooff valve group is all installed to transition valve piece both sides simultaneously to the control wrench opposite direction of two sets of ooff valve groups.

Preferably, the actuator cylinder is divided into two parts, one part forms a hydraulic servo actuator, the other part is provided with a displacement sensor, the displacement sensor is a MTL3 built-in displacement sensor, and the force sensor is a FL51 force sensor.

Preferably, the protection plates on two sides of the rear ball hinge assembly are both of a convex structure with an arc front end, a pin rod is fixed in the middle of the convex protection plates arranged on two sides, a ball joint is mounted on the pin rod, and the rear ball hinge assembly and the front ball hinge assembly are identical in structure.

Preferably, the valve plate is of a structure with two square sides and an octagonal middle part, the energy accumulators are detachably mounted on the inclined side faces of the octagonal structure in the middle of the valve plate, and the two groups of energy accumulators are symmetrical about the square structure arranged on the side faces of the valve plate.

Compared with the prior art, the beneficial effects of the utility model are that: this hydraulic servo actuator's displacement sensor installs inside the cylinder body, and the cylinder body outside only needs a plug, and the structure is exquisite, and the integrated level is high, and displacement sensor has received effectual protection, has avoided external force to displacement sensor's destruction, has completely cut off external dust and greasy dirt, has improved displacement sensor's protection level, has prolonged the life of sensor, detects the precision height, can effectual formation closed-loop control.

Drawings

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

FIG. 2 is a schematic sectional view of the structure of the present invention;

FIG. 3 is a schematic top view of the structure of the present invention;

fig. 4 is a schematic top view of a servo control valve set according to the structure of the present invention;

fig. 5 is a front view of the servo control valve set of the structure of the present invention.

In the figure: 1. an actuator cylinder body; 2. a servo control valve group; 3. a rear ball hinge assembly; 4. a front ball hinge assembly; 5. a first anti-backlash ring; 6. a sensor attachment flange; 7. a force sensor; 8. a second anti-backlash ring; 9. a connecting bolt; 10. a displacement sensor; 11. a sensor plug; 12. a valve plate; 13. a transition valve block; 14. an accumulator; 15. a servo valve; 16. a switch valve group.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a hydraulic servo actuator with a built-in displacement sensor structure comprises an actuator cylinder body 1, a servo control valve group 2, a rear ball hinge assembly 3, a front ball hinge assembly 4 and a force sensor 7, wherein the rear end of the actuator cylinder body 1 is connected with the rear ball hinge assembly 3, the servo control valve group 2 is installed above the actuator cylinder body 1 through screws, the front end of the actuator cylinder body 1 is connected with a first anti-backlash ring 5, the front end of the actuator cylinder body 1 is connected with a sensor connecting flange 6 through the self-locking effect of the first anti-backlash ring 5, the force sensor 7 is fixed on the sensor connecting flange 6 through bolts, the front end of the force sensor 7 is connected with a second anti-backlash ring 8, the second anti-backlash ring 8 is fixed on the front ball hinge assembly 4 through bolts, a displacement sensor 10 is installed at the rear end inside the actuator cylinder body 1, and a sensor plug 11 is installed on the actuator cylinder body 1 at the rear end of the displacement, the servo control valve group 2 comprises a valve plate 12, a transition valve block 13, an energy accumulator 14, a servo valve 15 and a switch valve group 16, wherein the transition valve block 13 is arranged in the middle above the valve plate 12, the servo valve 15 is arranged on the transition valve block 13, the switch valve group 16 is arranged on the valve plate 12 on the side surface of the transition valve block 13, the hydraulic control servo valve mainly refers to an electro-hydraulic servo valve which correspondingly outputs modulated flow and pressure after receiving an electrical analog signal, the electro-hydraulic servo valve is an electro-hydraulic conversion element and a power amplification element and can convert a weak electrical input signal with small power into hydraulic energy with high power to be output, the energy accumulator 14 is arranged on two sides of the valve plate 12, the energy accumulator is an energy storage device in a hydraulic pneumatic system and can convert the energy in the system into compression energy or potential energy to be stored at a proper time, and when the energy accumulator 14 converts the compression energy into the hydraulic energy to be released, the supply system is replenished again, the servo valve 15 connects the electric part with the hydraulic part to realize the conversion of the electro-hydraulic signal and the hydraulic amplification, and then the hydraulic system is controlled through the switch valve group 16, so that the actuator in the actuator cylinder body 1 is controlled, the force sensor 7 connected at the front end detects the force, and the displacement sensor 10 detects the displacement.

The hydraulic servo actuator is used as an executive component of a multi-path coordinated loading system and has the function of executing load application according to a control instruction sent by a control system, along with experimental long-time going on, can produce the clearance gradually because frictional action between each connecting piece, adopt blanking ring to reduce the clearance, ooff valve group 16 is all installed to transition valve piece 13 both sides simultaneously, and the control wrench opposite direction of two sets of ooff valve group 16, actuator cylinder body 1 divide into two parts, partly hydraulic servo actuator that forms, displacement sensor 10 is installed to another part, displacement sensor 10 is the built-in displacement sensor of MTL3 simultaneously, force sensor 7 is FL51 force sensor, the articulated assembly 3 both sides guard plate of back ball is the curved type structure of protruding of front end, and the protruding type guard plate middle part fixed pin pole that both sides set up, and install the ball joint on the pin pole, the articulated assembly 3 of back ball is the same with preceding ball articulated assembly 4 structure simultaneously, make the actuator of connecting rotate at will.

Valve plate 12 is the square structure in middle part octagon both sides, and demountable installation energy storage ware 14 on the slope side of the octagon structure in valve plate 12 middle part, and two sets of energy storage ware 14 are symmetrical about the square structure that valve plate 12 side set up, and after energy storage ware 14 used, can dismantle the change, and the energy storage ware 14 slope setting of installation can not contact actuator cylinder body 1.

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

Claims (6)

1. The utility model provides a hydraulic pressure servo actuator of built-in displacement sensor structure, includes actuator cylinder body (1), servo control valves (2), back ball hinge assembly (3), preceding ball hinge assembly (4) and force sensor (7), its characterized in that: the rear end of the actuator cylinder body (1) is connected with a rear ball hinge assembly (3), a servo control valve group (2) is installed above the actuator cylinder body (1) through a screw, the front end of the actuator cylinder body (1) is connected with a first anti-backlash ring (5), the front end of the actuator cylinder body (1) is connected with a sensor connecting flange (6) through the self-locking effect of the first anti-backlash ring (5), a force sensor (7) is fixed on the sensor connecting flange (6) through a bolt, the front end of the force sensor (7) is connected with a second anti-backlash ring (8), the second anti-backlash ring (8) is fixed on the front ball hinge assembly (4) through a bolt, a displacement sensor (10) is installed at the rear end inside the cylinder body (1), and a sensor plug (11) is installed on the cylinder body actuator (1) at the rear end of the displacement sensor (10);

the servo control valve group (2) comprises a valve plate (12), a transition valve block (13), an energy accumulator (14), a servo valve (15) and a switch valve group (16), the transition valve block (13) is installed in the middle of the upper portion of the valve plate (12), the servo valve (15) is installed on the transition valve block (13), the switch valve group (16) is installed on the valve plate (12) on the side face of the transition valve block (13), and the energy accumulator (14) is installed on two sides of the valve plate (12).

2. The hydraulic servo actuator with an internal displacement sensor structure as claimed in claim 1, wherein: the displacement sensor (10) is connected to the piston rod that actuator cylinder body (1) inside set up, and installs inside actuator cylinder body (1) displacement sensor (10) to displacement sensor (10) are connected with sensor plug (11) that actuator cylinder body (1) side set up.

3. The hydraulic servo actuator with an internal displacement sensor structure as claimed in claim 1, wherein: connecting bolt (9) of preceding ball hinge assembly (4) front side installation that actuator cylinder body (1) both sides set up, and connecting bolt (9) pass second anti-backlash ring (8) front end and fix on force sensor (7), and ooff valve group (16) are all installed to transition valve piece (13) both sides simultaneously to the control wrench opposite direction of two sets of ooff valve group (16).

4. The hydraulic servo actuator with an internal displacement sensor structure as claimed in claim 1, wherein: the actuator cylinder body (1) is divided into two parts, one part forms a hydraulic servo actuator, the other part is provided with a displacement sensor (10), the displacement sensor (10) is an MTL3 built-in displacement sensor, and the force sensor (7) is an FL51 force sensor.

5. The hydraulic servo actuator with an internal displacement sensor structure as claimed in claim 1, wherein: the rear ball hinge assembly (3) is characterized in that the two side protection plates are of a front end arc-shaped convex structure, pin rods are fixed in the middle of the convex protection plates arranged on two sides, ball joints are mounted on the pin rods, and meanwhile the rear ball hinge assembly (3) is identical to the front ball hinge assembly (4) in structure.

6. The hydraulic servo actuator with an internal displacement sensor structure as claimed in claim 1, wherein: the valve plate (12) is of a structure with two square sides and an octagonal middle part, the energy accumulators (14) are detachably mounted on the inclined side faces of the octagonal structure in the middle of the valve plate (12), and the two groups of energy accumulators (14) are symmetrical about the square structure arranged on the side face of the valve plate (12).

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