Control valve for door actuator and door actuator

Abstract

To provide a control valve capable of adjusting a flow rate of a door driving unit, and capable of being manufactured inexpensively and simply.SOLUTION: A control valve 1 for a door driving unit has a rotational shaft 3, the control valve 1 comprises at least two end parts 8, the control valve 1 comprises at least two sealing sections 12, the control valve 1 comprises a control section 4, and the control section 4 is arranged between the sealing sections 12. The control valve 1 for the door driving unit is particularly easy to manufacture, at least one radial thickness part 5 forms at least one of the sealing sections 12, and at least one radial taper 6 of the control valve 1 forms the control section 4.SELECTED DRAWING: Figure 1a

Description

[Technical Field]

[0001] The present invention relates to a control valve for a door actuator, the control valve having a rotary shaft, the control valve having at least two ends, the control valve having at least two sealing sections, the control valve having a control section, and the control section being disposed between the sealing sections. Further, the present invention relates to a door actuator.

[0002] EP 3 103 949 B1 discloses a door drive having a housing and at least one control valve for adjustable control of the flow rate in the door drive. This control valve has the disadvantage that it includes many components and requires complex process steps during manufacture. This makes it neither cheap nor easy to manufacture.

[0003] It is therefore an object of the present invention to provide a control valve for a door drive that is particularly easy to manufacture.It is a further object of the present invention to provide a control valve for a door drive that is particularly inexpensive to manufacture.It is a further object of the present invention to provide a door drive that is particularly easy to manufacture.It is a further object of the present invention to provide a door drive that is particularly inexpensive to manufacture.

[0004] The object set out in the above development is achieved by the control valve for a door drive as described in the introduction in that at least one of the sealing sections is formed by at least one radially thickened section and the control section is formed by at least one radially tapered section of the control valve. Advantageous further developments of the invention are shown in the dependent claims, the detailed description and the drawings. In this context, a radially thickened section means that the diameter of the control valve at this position is larger than the diameter of its immediate area as seen along the rotation axis. In this context, a tapered section means that the diameter of the control valve at this position is smaller than the diameter of its immediate area as seen along the rotation axis.

[0005] Furthermore, it may be provided that the radially thickened portion or at least one of the radially thickened portions is integrally formed with the control valve, thereby achieving a control valve that can be manufactured easily and inexpensively.

[0006] Furthermore, it may be provided that the tapered portion or at least one of the tapered portions has a cross section that is symmetrical in the direction of the rotation axis, thereby achieving that the control valve can be manufactured easily and cheaply.

[0007] Furthermore, the control valve may be provided with at least one engagement portion, which allows the control valve to be easily operable, for example, with a tool or by hand.

[0008] Furthermore, it may be provided that the or at least one of the engagement portions is arranged at one of the ends, thereby achieving easy access to the engagement portion.

[0009] Furthermore, it may be provided that each end includes at least one engagement portion, thereby achieving that the control valve can be operated from both ends.

[0010] It may further be provided that the control valve is rotatable about an axis of rotation by means of one engagement portion or by means of at least one of the engagement portions.

[0011] It may further be provided that the control valve includes a screw.

[0012] It may further be provided that the or at least one of the threads is formed coaxially with the axis of rotation.

[0013] It may further be provided that the screw or at least one of the screws is arranged at one of the ends.

[0014] It may further be provided that at least one end includes both a thread and an engagement portion.

[0015] It may further be provided that the control valve includes a guide section at one of the ends.

[0016] It may further be provided that the guide section has a smaller diameter than the other end.

[0017] Furthermore, it may be provided that the or at least one of the radial thickenings extends rotatably and symmetrically about the axis of rotation, thereby achieving that the radial thickenings reliably perform the sealing function of the control valve.

[0018] It may further be provided that the tapered portion or at least one of the tapered portions extends symmetrically and rotatably about the axis of rotation, thereby achieving that the control effect of the tapered portion is independent of the pure rotation of the control valve about its axis of rotation.

[0019] It may further be provided that several radial thicknesses form at least one of the sealing sections, the radial thicknesses being spaced apart from one another in the direction of the rotation axis, thereby achieving a particularly reliable performance of the sealing function of the control section by the radial thicknesses.

[0020] Furthermore, it may be provided that the control valve can be screwed into the door drive by means of one screw or by means of one of the screws, thereby achieving a reliable adjustment and guideability of the control valve in the door drive.

[0021] It may further be provided that the control valve is made from a plastic material, thereby achieving that the control valve is easy and cheap to manufacture.

[0022] It may further be provided that the plastic material is polyamide, thereby achieving a control valve that is simple and inexpensive to manufacture.

[0023] It may further be provided that the plastic material includes fibers.

[0024] It may further be specified that fiber includes glass fiber.

[0025] Furthermore, it may be provided that the fibres make up 5 to 50 mass percent of the plastic material, preferably 20 to 40 mass percent, particularly preferably 25 to 35 mass percent.

[0026] It may further be provided that the control valve includes at least one surrounding annular sealing groove.

[0027] It may further be provided that the control valve includes at least one sealing ring.

[0028] It may further be provided that the or at least one of the sealing rings is arranged in the or one of the annular sealing grooves.

[0029] It may further be provided that the or at least one of the annular sealing grooves is disposed between the one end and the nearest sealing section.

[0030] It may further be provided that the control valve includes at least two sealing rings, at least one of which has a smaller diameter than the other sealing ring, thereby achieving that the sealing ring with the smaller diameter is protected from being damaged, particularly by the screw seat of the control valve seat, when the control valve is inserted into the door drive. The diameter of the sealing ring hereby refers to the outer diameter of the sealing ring.

[0031] Furthermore, it may be provided that the control valve is an injection molded part, thereby achieving that the control valve is simple and cheap to manufacture.

[0032] Furthermore, it may be provided that the control valve is a turned part, which makes it possible to achieve a control valve that is simple and inexpensive to manufacture.

[0033] Furthermore, the object set forth in the above development is achieved by the door drive as described at the outset in that the door drive comprises a control valve according to one of the above claims, thereby achieving a particularly simple manufacturing capability of the door drive. Advantageous further developments of the invention are set forth in the dependent claims, the description and the drawings.

[0034] Furthermore, it may be provided that the door drive unit includes at least one control valve receiving portion, and the control valve or at least one of the control valves is accommodated in the control valve receiving portion of the door drive unit, thereby achieving reliable accommodation of the control valve in the door drive unit.

[0035] Furthermore, it may be provided that at least one of the sealing sections has a diameter larger than the diameter of the associated control valve receiver. This ensures that the sealing section, or at least one of the sealing sections in each associated control valve receiver, can reliably perform its sealing function. This is achieved by the sealing section, or at least one of the sealing sections, being elastically deformable, which means that it is reversible. Thus, the sealing section conforms to the surface of the control valve receiver that faces the control valve.

[0036] It may further be provided that the door drive has a longitudinal axis, the longitudinal axis being determined by the direction of movement of a piston arranged in the door drive or a spring arranged in the door drive, and that the control valve or at least one of the control valves is arranged perpendicular to the longitudinal axis, thereby achieving a particularly easy manufacturing of the door drive.

[0037] Furthermore, it may be provided that at least one control valve receptacle includes a guide section receptacle, the guide section receptacle receiving a guide section of an associated control valve, thereby achieving a particularly easy manufacture of the door drive, and further achieving a reliable guidance of the associated control valve in the control valve receptacle.

[0038] It may further be provided that the step bore forms the control valve receiving part, the step bore comprises at least two sections in the longitudinal direction, one of the sections forms the guide section receiving part, thereby achieving a particularly easy manufacturing of the door drive.

[0039] It may further be provided that the section with the smallest diameter forms the guide section receiver.

[0040] It may further be provided that the door drive unit comprises an output shaft, the output shaft being supported in the door drive unit, the output shaft being rotatable about an output axis, the output shaft including at least one connection portion, the connection portion or at least one of the connection portions functioning for connection of the arm assembly.

[0041] It may further be specified that the control valve or at least one of the control valves is disposed perpendicular to the output shaft, thereby achieving easy access to the control valve or at least one of the control valves when attached to the door.

[0042] Furthermore, it may be provided that the or at least one of the control valves connects at least two hydraulic channels in the door drive, thereby achieving a particularly easy manufacturing of the door drive.

[0043] Furthermore, it may be provided that the or at least one of the control valves serves to control the hydraulic flow between the hydraulic channels, thereby achieving a particularly reliable and controllable hydraulic flow.

[0044] Furthermore, it may be provided that the hydraulic channel extends perpendicular to the axis of rotation, thereby achieving a particularly easy manufacturing capability of the door drive.

[0045] Furthermore, it may be provided that the hydraulic channels extend coaxially, thereby achieving a particularly easy manufacturing capability of the door drive.

[0046] It may further be provided that at least one of the sealing sections is made of a softer material than a respective associated control valve receiving part, thereby achieving that the sealing section, at least one of the sealing sections in each associated control valve receiving part, respectively, conforms to the inner diameter of the control valve receiving part by elastic deformation.

[0047] It may further be provided that the control valve receiving portion or at least one of the control valve receiving portions includes at least one screw receiving portion, and the screw receiving portion or at least one of the screw receiving portions cooperates with an associated screw of an associated control valve, thereby achieving that the control valve is movable in the direction of the rotation axis of the control valve.

[0048] It may further be provided that the door drive comprises an arm assembly, the arm assembly being connected to an output shaft of the door drive, the arm assembly functioning to transmit force between the door drive and the door or door frame.

[0049] It may further be specified that the arm assembly is a scissor arm assembly.

[0050] It may further be specified that the arm assembly is a slide rail arm assembly.

[0051] It may further be provided that the output shaft protrudes from two opposite sides of the door drive unit, the output shaft including a connection portion on both sides. Depending on the mounting orientation of the door drive unit, for example, one of the two connection portions may be used and connected to the arm assembly accordingly, while the other connection portion remains unused.

[0052] Hereinafter, the present invention will be described in more detail based on exemplary embodiments, and technical features having the same functions are identified by the same reference numerals in the drawings. The drawings are as follows: [Brief explanation of the drawings]

[0053] [Figure 1a] A control valve 1 of the present invention for a door drive 2. [Figure 1b] A control valve 1 of the present invention for a door drive 2. [Figure 2] This is a door drive unit 2 of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0054] FIG. 1a shows a control valve 1 of the present invention for a door drive 2, the control valve 1 having a rotating shaft 3, the control valve 1 having at least two ends 8, the control valve 1 having at least two sealing sections 12, the control valve 1 having a control section 4, the control section 4 being arranged between the sealing sections 12.

[0055] Three radially thickened portions 5 form both sealing sections 12. The radially thickened portions 5 are spaced apart from one another in the direction of the rotation axis 3. A radially tapered portion 6 forms the control section 4. The radially thickened portions 5 are formed integrally with the control valve 1. The radially thickened portions 5 extend rotationally symmetrically around the rotation axis 3. The tapered portions 6 likewise extend rotationally symmetrically around the rotation axis 3. In the direction of the rotation axis 3, the tapered portions 6 have a symmetrical cross section.

[0056] The control valve 1 has two engagement portions 7. The control valve 1 has two end portions 8. One engagement portion 7 is disposed at each end portion 8. Therefore, each end portion 8 has one engagement portion 7. In FIG. 1b, the control valve 1 of FIG. 1a is shown in a perspective view, so that the engagement portions 7 are easier to see. One hexagon socket each forms the engagement portion 7.

[0057] The control valve 1 includes a screw 9. The screw 9 is disposed on the right side of the two ends 8 of the control valve 1. Therefore, the right side of the two ends 8 includes both the engagement portion 7 and the screw 9. The screw 9 is formed coaxially with the rotation shaft 3.

[0058] The control valve 1 includes a guide section 10. The guide section 10 is located at the left end of the two ends 8. The guide section 10 has a smaller diameter than the right end of the two ends 8. The control valve 1 includes two surrounding annular sealing grooves 11. The annular sealing groove 11 serves to accommodate sealing rings (not shown). The annular sealing groove 11 is located between one of the ends 8 and the nearest sealing section 12.

[0059] The screw 9 allows the control valve 1 to be screwed into a control valve receiving part 14 (see FIG. 2) of the door drive 2. For this purpose, the control valve receiving part 14 has a screw receiving part. The control valve 1 is rotatable about its rotation axis 3 via the engagement part 7. When the control valve 1 is rotated in the control valve receiving part 14, the control valve 1 is displaced in the direction of the control valve rotation axis 3. This also displaces the control valve 1 relative to a hydraulic channel arranged in the door drive 1. Depending on the position of the control valve 1 in the door drive 2, hydraulic oil is allowed to flow along the tapered part 6 of the control valve 1 or is blocked.

[0060] FIG. 2 shows a door driver 2 of the present invention. The door driver 2 includes a control valve receiving portion 14. The control valve 1 of the present invention is placed in the control valve receiving portion 14. One end 8 of the control valve 1 is visible in FIG. 2. This end 8 of the control valve 1 includes an engagement portion 7. A hexagonal socket forms the engagement portion 7. The door driver 2 has a longitudinal axis 13. The door driver 2 includes an output shaft 18. The output shaft 18 is supported in the door driver 2. The output shaft 18 extends perpendicular to the longitudinal axis 13. The output shaft 18 is rotatable about an output axis 19. The output shaft 19 extends perpendicular to the longitudinal axis 13. The output shaft 18 protrudes from the top and bottom surfaces of the door driver 2. The output shaft 18 has connection portions 20 at its two ends. Only the upper connection portion 20 is visible in this figure. The connection portion 20 serves to connect an arm assembly (not shown). The control valve 1 is disposed perpendicular to the output shaft 19 . [Explanation of symbols]

[0061] 1 Control valve 2 Door drive unit 3 Rotation Axis 4 Control Section 5 Thickness 6 Tapered section 7 Engagement part 8 End 9 screws 10 Guide Section 11 Annular sealing groove 12 Sealing Section 13 Long axis 14 Control valve receiving part 18 Output shaft 19 Output shaft 20 Connection

Claims

1. A control valve for a door actuator, the control valve comprising a rotating shaft, the control valve comprising at least two ends, the control valve comprising at least two sealing sections, the control valve comprising a control section, the control section being disposed between the sealing sections; at least one radial thickness defines at least one of the sealing sections; at least one radially tapered portion of the control valve defines the control section disposed between the sealing sections; A control valve for a door drive, wherein the at least two sealing sections are each formed by a plurality of radially thickened portions.

2. A control valve for a door drive, the control valve having a rotary shaft, the control valve having at least two ends, the control valve having at least two sealing sections, the control valve having a control section, the control section being disposed between the sealing sections; at least one radial thickness defines at least one of the sealing sections; at least one radially tapered portion of the control valve defines the control section; The control valve includes two surrounding annular sealing grooves; The control valve includes two sealing rings; the two sealing rings are disposed in the two surrounding annular sealing grooves, respectively; A control valve for a door drive, wherein each of the two surrounding annular sealing grooves is disposed between an end and a nearest sealing section.

3. A control valve for a door drive unit as described in claim 2, wherein one of the two sealing rings has a smaller diameter than the other of the two sealing rings.

4. A control valve for a door drive according to any one of claims 1 to 3, wherein the or at least one of the radial thickenings is integrally formed with the control valve.

5. 5. A control valve for a door drive according to claim 1, wherein the control valve comprises at least one engagement portion.

6. A control valve for a door drive according to any one of claims 1 to 5, wherein each end includes at least one engagement portion.

7. a number of radial thicknesses forming at least one of the sealing sections; 7. The control valve for a door drive according to claim 1, wherein the radially thickened portions are arranged spaced apart from each other in the direction of the rotation axis.

8. A control valve for a door drive according to any one of claims 1 to 7, wherein the control valve is made from a plastic material.

9. A control valve for a door drive according to any one of claims 1 to 8, wherein the control valve is an injection moulded part.

10. A door drive comprising a control valve for a door drive according to any one of claims 1 to 9.

11. the door actuator includes at least one control valve receiving portion; The door drive of claim 10, wherein the or at least one of the control valves is housed in the control valve receiving portion of the door drive.

12. The door drive of claim 11 , wherein at least one of the sealing sections has a diameter greater than a diameter of the associated control valve receiver.

13. the door driver includes an output shaft; the output shaft is supported in the door drive; The output shaft is rotatable about an output axis; the output shaft includes at least one connection portion; 13. A door drive according to any one of claims 10 to 12, wherein the or at least one of the connections serves for the connection of an arm assembly.

14. 14. The door drive of claim 13, wherein the or at least one of the control valves is disposed perpendicular to the output shaft.

15. 15. A door drive according to any one of claims 10 to 14, wherein the or at least one of the control valves connects at least two hydraulic channels in the door drive.

16. 16. The door drive of claim 15, wherein the or at least one of the control valves functions to control hydraulic flow between the hydraulic channels.

17. The door drive of claim 11 , wherein at least one of the sealing sections is made from a softer material than the associated respective control valve receiver.

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