Safety protection device for main spring of electric hydraulic actuator

Abstract

The utility model relates to the technical field of electric hydraulic actuators, in particular to an electric hydraulic actuator main spring safety protection device which comprises an assembling plate, a flexible protection support, a clamping plate, an electric hydraulic driving assembly and a shell. A long hole is vertically formed in the bottom end of a groove of the shell in a penetrating mode, an electric hydraulic driving assembly is vertically inserted into the shell, a spring vertically sleeves the outer portion of the electric hydraulic driving assembly, a support is fixed to the top face of the electric hydraulic driving assembly, and the support is fixedly connected with the top end of the spring. The flexible protection support is arranged in the electric hydraulic driving assembly in a sleeved mode, the flexible protection support is inserted into the shell, and the flexible protection support comprises a flexible body. During disassembly and assembly, the spring has deformation force to push the flexible body to deform, so that direct elastic release of the spring is avoided, potential safety hazards are reduced, and safety during disassembly and assembly of the electric hydraulic drive assembly is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of electro - hydraulic actuators, and particularly relates to a main spring safety protection device for an electro - hydraulic actuator. Background Technique

[0002] An electro - hydraulic actuator is a device that converts electrical energy into hydraulic energy and further converts hydraulic energy into linear or rotational motion. It is usually used in applications that require strong thrust or torque. Existing electro - hydraulic actuators generally have a spring with a large elastic coefficient, and a pre - compression treatment is carried out during assembly. The pre - compression force is generally 1000N or even several thousand Newtons.

[0003] The existing patent with publication number CN213745164U and name "A 25 - millimeter - stroke electro - hydraulic actuator" includes an action execution mechanism, and a control box is integrally arranged on the action execution mechanism; the control box and the action execution mechanism are detachably connected. The action execution mechanism includes an outer cylinder, a top cover is arranged at the top of the outer cylinder, and a status display lighting module is also arranged at the top of the outer cylinder, below the top cover. The status display lighting module is an LED aperture arranged in a 360° surround; a universal connector is arranged at the bottom of the outer cylinder, the universal connector is connected to the spring, and the spring is limited by a pre - pressing device so that the extendable length is within the minimum range. By means of automatic tuning, the movement range of the valve can be any movement distance within 25 millimeters; the machine control and display are integrated, which can not only achieve remote control but also be suitable for different usage scenarios of users.

[0004] However, for the above - mentioned electro - hydraulic actuator, the spring has a large pre - pressure and is in a deformed state. Such a pre - compressed large - thrust spring has a problem of potential safety hazards of accidental spring ejection during use, disassembly, recycling and other processes, which affects the safety of disassembly and assembly of the electro - hydraulic actuator. Content of the Utility Model

[0005] The utility model solves the problems in the related technology and proposes a main spring safety protection device for an electro - hydraulic actuator.

[0006] To solve the above technical problems, the present utility model is realized through the following technical solutions: An electric-hydraulic actuator main spring safety protection device, comprising an assembly plate, a flexible protection bracket, a clamping plate, an electric-hydraulic drive assembly and a housing. The top surface of the housing is provided with an opening, and grooves are vertically opened on both sides of the housing. A long hole is vertically penetrated through the bottom end of the groove of the housing, and the electric-hydraulic drive assembly is vertically inserted into the housing. A spring is vertically sleeved outside the electric-hydraulic drive assembly, and a bracket is fixed on the top surface of the electric-hydraulic drive assembly, and the bracket is fixedly connected to the top end of the spring. The flexible protection bracket is sleeved inside the electric-hydraulic drive assembly, and the flexible protection bracket is inserted into the housing. The flexible protection bracket includes a flexible body, the flexible body adopts a rotary bending structure, and both sides of the flexible body are vertically inserted into the grooves, and the bottom parts of both sides of the flexible body penetrate through the long holes, and the bottom of the flexible body is clamped by the clamping plate.

[0007] As a preferred solution, a support end face is vertically penetrated through the bracket on the top surface of the electric-hydraulic drive assembly, and an upper clamping frame is horizontally fixed in the middle of the support end face.

[0008] As a preferred solution, a cover plate is horizontally arranged on one side of the support end face.

[0009] As a preferred solution, two first notches are symmetrically arranged on the top surface of the flexible body, and a second notch is opened on one side of the top surface of the flexible body.

[0010] As a preferred solution, the two first notches on the flexible body are in clamping fit with the upper clamping frame, and the second notch on the flexible body is in clamping fit with the cover plate.

[0011] As a preferred solution, first bosses are fixed on both top parts of both sides of the flexible body, and the first bosses are made of flexible materials.

[0012] As a preferred solution, mounting holes are vertically penetrated through the lower parts of both sides of the flexible body, and second bosses are fixed on the upper parts of the mounting holes of the flexible body.

[0013] As a preferred solution, a third boss is arranged in the middle of the clamping plate, stress holes are penetrated through both sides of the clamping plate, and fourth bosses and fifth bosses are symmetrically arranged on both sides of the clamping plate.

[0014] As a preferred solution, the third boss is inserted into the mounting hole of the flexible body, and the fourth bosses and fifth bosses on both sides of the clamping plate are respectively clamped on the bottom parts of both sides of the flexible body.

[0015] As a preferred solution, multiple pieces of retaining plates are horizontally fixed on both sides of the bottom of the housing.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows: In the use of the utility model, the electro-hydraulic drive assembly is installed in the housing, and the spring is installed between the housing and the electro-hydraulic drive assembly, against the lower part of the bracket. When installed, the spring is pre-compressed and has a thrust of 1000 to several thousand Newtons. The flexible protection bracket covers the outside of the electro-hydraulic drive assembly and is also installed in the housing. The clamping plate is clamped between the housing and the flexible protection bracket to realize the fixation of the flexible protection bracket. When installed, the flexible body in the middle of the flexible installation bracket adopts a rotary bending design and is prone to deformation when subjected to external forces, thereby absorbing the energy of the external forces. Thus, when disassembling and assembling, the spring has a deformation force to push the flexible body to deform, further avoiding the direct elastic release of the spring, reducing the safety hazard, and ensuring the safety during the disassembly and assembly of the electro-hydraulic drive assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. 6 is a schematic structural diagram of the whole in a disassembled state in an embodiment of the utility model;

[0018] Figure 2 FIG. 10 is a schematic structural diagram of the flexible protection bracket in a disassembled state in an embodiment of the utility model;

[0019] Figure 3 FIG. 14 is a schematic structural diagram of the clamping plate in a disassembled state in an embodiment of the utility model;

[0020] Figure 4 FIG. 18 is a schematic structural diagram of the electro-hydraulic drive assembly in a disassembled state in an embodiment of the utility model;

[0021] Figure 5 FIG. 22 is a schematic structural diagram of the housing from a first perspective in an embodiment of the utility model;

[0022] Figure 6 FIG. 26 is a schematic structural diagram of the housing from a second perspective in an embodiment of the utility model.

[0023] In the figure: 1. Assembly plate; 2. Flexible protection bracket; 201. First notch; 202. Second notch; 203. First boss; 204. Flexible body; 205. Second boss; 206. Mounting hole; 3. Clamping plate; 301. Third boss; 302. Fourth boss; 303. Fifth boss; 304. Stress hole; 4. Electro-hydraulic drive assembly; 401. Bracket; 402. Support end face; 403. Upper clamping frame; 404. Cover plate; 405. Spring; 5. Housing; 501. Groove; 502. Long hole; 503. Retaining piece. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way restricts the present utility model and its application or use. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and values set forth in these embodiments do not limit the scope of the present utility model. At the same time, it should be understood that for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0027] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" is usually based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0028] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding interpretations of the spatial relative descriptions used herein will be made accordingly.

[0029] In addition, it should be noted that the use of terms such as "first", "second" etc. to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present utility model.

[0030] Such as Figures 1 to 5As shown in the figure, a main spring safety protection device for an electro-hydraulic actuator includes an assembly plate 1, a flexible protection bracket 2, a clamping plate 3, an electro-hydraulic drive assembly 4, and a housing 5. The top surface of the housing 5 is open, and grooves 501 are vertically opened on both sides of the housing 5. A long hole 502 is vertically penetrated through the bottom end of the groove 501 of the housing 5. An electro-hydraulic drive assembly 4 is vertically inserted into the housing 5. A spring 405 is vertically sleeved outside the electro-hydraulic drive assembly 4. A bracket 401 is fixed on the top surface of the electro-hydraulic drive assembly 4, and the bracket 401 is fixedly connected to the top end of the spring 405. The flexible protection bracket 2 is sleeved inside the electro-hydraulic drive assembly 4, and the flexible protection bracket 2 is inserted into the housing 5. The flexible protection bracket 2 includes a flexible body 204. The flexible body 204 adopts a rotary bending structure. Both sides of the flexible body 204 are vertically inserted into the grooves 501, and the bottom parts of both sides of the flexible body 204 penetrate through the long hole 502. The bottom of the flexible body 204 is clamped by the clamping plate 3. During use, the electro-hydraulic drive assembly 4 is installed in the housing 5. The spring 405 is installed between the housing 5 and the electro-hydraulic drive assembly 4 and abuts against the lower part of the bracket 401. When installed, the spring 405 is pre-compressed and has a thrust of 1000 to several thousand Newtons. The flexible protection bracket 2 covers the outside of the electro-hydraulic drive assembly 4 and is also installed in the housing 5. The clamping plate 3 is clamped between the housing 5 and the flexible protection bracket 2 to fix the flexible protection bracket 2. When installed, the flexible body 204 in the middle of the flexible installation bracket 2 adopts a rotary bending design and is prone to deformation when subjected to external forces, thereby absorbing the energy of the external forces. Thus, when disassembling and assembling, the spring 405 has a deformation force to push the flexible body 204 to deform, thereby avoiding the direct elastic release of the spring 405, reducing the safety hazard, and ensuring the safety during the disassembly and assembly of the electro-hydraulic drive assembly 4.

[0031] In one embodiment, as Figure 2 and 4 shown, a support end face 402 is vertically penetrated through the bracket 401 on the top surface of the electro-hydraulic drive assembly 4, and an upper clamping frame 403 is horizontally fixed in the middle of the support end face 402. A cover plate 404 is horizontally arranged on one side of the support end face 402. Two first notches 201 are symmetrically arranged on the top surface of the flexible body 204, and a second notch 202 is opened on one side of the top surface of the flexible body 204. The two first notches 201 on the flexible body 204 are in clamping fit with the upper clamping frame 403, and the second notch 202 on the flexible body 204 is in clamping fit with the cover plate 404. In the initial state of the electro-hydraulic actuator, the surface of the support end face 402 of the electro-hydraulic drive assembly 4 is close to the lower surface of the upper part of the flexible installation bracket 2. The first notch 201 is sleeved outside the upper clamping frame 403, and the second notch 202 is sleeved outside the cover plate 404, completing the assembly connection between the flexible installation bracket 2 and the top of the electro-hydraulic drive assembly 4.

[0032] In one embodiment, asFigure 2 As shown, first bosses 203 are fixed to both top sides of the flexible body 204, and the first bosses 203 are made of flexible material. The flexible body 204 and the first bosses 203 as a whole are in the groove 501 of the housing 5. When the spring 405 pops out accidentally, the flexible protection bracket 2 deforms under the thrust of the spring 405. The groove 501 can play a guiding role to constrain the flexible protection bracket 2 to deform in the guided direction. When the flexible protection bracket 2 deforms, the rotary bending part of the flexible body 204 will open, and the first bosses 203 will also open outwards. The greater the force, the more serious the outward turning. When reaching a certain limit, the first bosses 203 will tightly abut against or even pierce into the housing 5 in severe cases, further increasing the protection effect of the flexible protection bracket 2, preventing the flexible protection bracket 2 from breaking due to exceeding the deformation amount, and at the same time, the first bosses 203 can also play a certain guiding role when slightly deformed.

[0033] In one embodiment, as Figure 2 and 3 shown, mounting holes 206 are formed through both lower sides of the flexible body 204, and a second boss 205 is fixed to the upper part of the mounting holes 206 of the flexible body 204. A third boss 301 is provided in the middle of the clamping plate 3, and stress holes 304 are formed through both sides of the clamping plate 3. Fourth bosses 302 and fifth bosses 303 are symmetrically arranged on both sides of the clamping plate 3. The third boss 301 is inserted into the mounting hole 206 of the flexible body 204, and the fourth bosses 302 and fifth bosses 303 on both sides of the clamping plate 3 are respectively clamped to the bottom sides of both sides of the flexible body 204. A plurality of retaining pieces 503 are horizontally fixed to both bottom sides of the housing 5. The clamping plate 3 is installed between the bracket 2 and the housing 5. The third boss 301 in the middle of the clamping plate 3 is inserted into the long hole 206 at the bottom of the flexible protection bracket 2. There is a chamfer at the top of the third boss 301 to facilitate the installation of the clamping plate 3. The clamping plate 3 is designed with stress holes 304. When installed, deformation occurs here. After installation in place, the clamping plate 302 clamps the inner side of the bottom of the bracket, and the clamping plate 303 clamps the outer side of the bottom of the bracket. The deformation of the clamping plate 3 is restored, so that the bracket 2 can be firmly clamped to prevent the bracket 2 from falling off.

[0034] In this embodiment, during use, the electro-hydraulic drive assembly 4 is installed in the housing 5. The spring 405 is installed between the housing 5 and the electro-hydraulic drive assembly 4, and abuts against the lower part of the bracket 401. When installed, the spring 405 is pre-compressed and has a thrust force of 1000 to several thousand Newtons. The flexible protection bracket 2 covers the outside of the electro-hydraulic drive assembly 4 and is also installed in the housing 5. The third boss 301 in the middle of the clamping plate 3 is inserted into the long hole 206 at the bottom of the flexible protection bracket 2. The top of the third boss 301 has a chamfer to facilitate the installation of the clamping plate 3. The clamping plate 3 is designed with a stress hole 304. When installed, deformation occurs here. After installation in place, the clamping plate 302 clamps the inner side of the bottom of the bracket, and the clamping plate 303 clamps the outer side of the bottom of the bracket. The deformation of the clamping plate 3 is restored, so that the bracket 2 can be firmly clamped to prevent the bracket 2 from falling off. When installed, the flexible body 204 in the middle of the flexible installation bracket 2 adopts a rotary bending design. When the spring 405 pops out accidentally, the flexible protection bracket 2 deforms under the thrust of the spring 405. The groove 501 can play a guiding role, restricting the flexible protection bracket 2 to deform in the guided direction. When restricting the deformation of the flexible protection bracket 2, the rotary bending part of the flexible body 204 will open, and the first boss 203 also opens outwards. The greater the force, the more serious the outward turn. When reaching a certain limit, the first boss 203 will tightly abut against or even pierce into the housing 5 in severe cases, further increasing the protection effect of the flexible protection bracket 2, preventing the flexible protection bracket 2 from breaking due to exceeding the deformation amount. At the same time, the first boss 203 can also play a certain guiding role during slight deformation, and is prone to deformation when receiving an external force to absorb the energy of the external force.

[0035] The above is the preferred embodiment of the present invention. Those skilled in the art to which the present invention pertains can also make changes and modifications to the above embodiment. Therefore, the present invention is not limited to the above specific embodiment. Any obvious improvement, replacement or variation made by those skilled in the art on the basis of the present invention belongs to the protection scope of the present invention.

Claims

1. A main spring safety protection device for an electric hydraulic actuator, characterized in that: The invention comprises an assembly plate (1), a flexible protective bracket (2), a clamping plate (3), an electric hydraulic drive assembly (4) and a housing (5), wherein the top surface of the housing (5) is open, and grooves (501) are vertically provided on both sides of the housing (5), a long hole (502) is vertically penetrated through the bottom end of the groove (501) of the housing (5), and the electric hydraulic drive assembly (4) is vertically inserted into the interior of the housing (5), a spring (405) is vertically sleeved on the outside of the electric hydraulic drive assembly (4), and a bracket (406) is fixed on the top surface of the electric hydraulic drive assembly (4). 1), and the bracket (401) is fixedly connected to the top of the spring (405), the flexible protective bracket (2) is sleeved inside the electric hydraulic drive assembly (4), and the flexible protective bracket (2) is inserted into the inside of the housing (5), the flexible protective bracket (2) comprises a flexible body (204), the flexible body (204) adopts a rotary bending structure, and the two sides of the flexible body (204) are vertically inserted into the groove (501), and the bottom of the two sides of the flexible body (204) is penetrated by the long hole (502), and the bottom of the flexible body (204) is clamped by the clamping plate (3).

2. The main spring safety protection device of an electric hydraulic actuator according to claim 1, characterized in that: The top surface of the electric hydraulic drive assembly (4) vertically penetrates the bracket (401) and is provided with a support end surface (402), and an upper clamping frame (403) is horizontally fixed in the middle of the support end surface (402).

3. The main spring safety protection device of an electric hydraulic actuator according to claim 2, characterized in that: A cover plate (404) is horizontally arranged on one side of the supporting end surface (402).

4. The main spring safety protection device of an electro-hydraulic actuator according to claim 3 is characterized in that: Two first notches (201) are symmetrically arranged on the top surface of the flexible body (204), and a second notch (202) is opened on one side of the top surface of the flexible body (204).

5. The main spring safety protection device of an electro-hydraulic actuator according to claim 4, characterized in that: The two first notches (201) on the flexible body (204) are snap-fitted with the upper clamping frame (403), and the second notch (202) on the flexible body (204) is snap-fitted with the cover plate (404).

6. The main spring safety protection device of an electro-hydraulic actuator according to claim 5, characterized in that: First bosses (203) are fixed to the tops of both sides of the flexible body (204), and the first bosses (203) are made of a flexible material.

7. The main spring safety protection device of an electro-hydraulic actuator according to claim 6, characterized in that: Mounting holes (206) are provided through the lower parts of both sides of the flexible body (204), and a second boss (205) is fixed on the upper part of the mounting hole (206) of the flexible body (204).

8. The main spring safety protection device of an electro-hydraulic actuator according to claim 7, characterized in that: A third boss (301) is provided in the middle of the card plate (3), stress holes (304) are provided through both sides of the card plate (3), and a fourth boss (302) and a fifth boss (303) are symmetrically provided on both sides of the card plate (3).

9. The main spring safety protection device of an electro-hydraulic actuator according to claim 8, characterized in that: The third boss (301) is inserted into the mounting hole (206) of the flexible body (204), and the fourth boss (302) and the fifth boss (303) on both sides of the clamping plate (3) are respectively clamped on the bottom of both sides of the flexible body (204).

10. The main spring safety protection device of an electro-hydraulic actuator according to claim 9, characterized in that: A plurality of blocking sheets (503) are horizontally fixed on both sides of the bottom of the housing (5).

Images