Guide vane servomotor piston rod convenient to replace

Abstract

The guide vane servomotor piston rod convenient to replace comprises a cylinder body, a movable groove is formed in the cylinder body, a piston body is connected into the movable groove in a sliding mode, the piston rod body is arranged on one side of the piston body, and external threads are arranged at the end, close to the piston body, of the piston rod body. An internal thread is arranged in the piston body; the top of the cylinder body is fixedly connected with a driving box, and a worm and a rotating shaft are rotationally arranged in the driving box. After the worm obtains power to rotate, the worm gear and the rotating shaft on the inner side of the worm gear can be driven to rotate, so that the straight gear obtains power to rotate and drives the rack on the outer side to move downwards, and then the limiting shaft is driven to slide in the driving box and the cylinder body and be inserted into a limiting hole formed in the top of the piston body; and the piston body is limited, so that the efficiency of detaching the piston rod body from the piston body cannot be influenced by sliding of the piston body during detaching by a worker, and the piston rod body is convenient to replace.

Description

Technical Field

[0001] The utility model relates to a guide vane servo piston rod which is easy to replace and belongs to the technical field of servos. Background Art

[0002] The guide vane servo is an important component of the water turbine's water guide mechanism, used to transmit operating force to control the opening of the guide vanes, thereby regulating the water flow. Guide vane servos can be divided into various types according to different design principles and application scenarios. Guide vane servos can be divided into hydraulic guide vane servos and pneumatic guide vane servos according to the working medium. Among them, the hydraulic guide vane servo uses hydraulic oil as the working medium, generates thrust through hydraulic cylinders and pistons, and has the characteristics of smooth transmission and rapid response. Pneumatic guide vane servo: uses compressed air as the working medium, generates thrust through cylinders and pistons, and is suitable for certain specific environments or occasions requiring explosion protection.

[0003] Although the existing guide vane servo piston rod can stably control the opening of the guide vane and thus regulate the water flow, when replacing the piston rod in the guide vane servo, the piston is prone to sliding, making it difficult to remove the piston rod from the piston, which brings inconvenience to the staff when replacing the piston rod in the guide vane servo. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a guide vane servo piston rod that is easy to replace, so as to solve the problem proposed in the above background technology that although the existing guide vane servo piston rod can stably control the opening of the guide vane and thus regulate the water flow, when replacing the piston rod in the guide vane servo, the piston is prone to sliding and slipping, making it difficult to remove the piston rod from the piston, which brings inconvenience to the staff when replacing the piston rod in the guide vane servo.

[0005] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical solutions: a guide vane relay piston rod that is easy to replace, comprising a cylinder body, a movable groove is opened in the interior of the cylinder body, a piston body is slidably connected to the interior of the movable groove, a piston rod body is provided on one side of the piston body, an external thread is provided on the end of the piston rod body close to the piston body, an internal thread is provided in the interior of the piston body, and the internal thread matches the external thread; the top of the cylinder body is fixedly connected to a drive box, a worm and a rotating shaft are rotatably provided in the internal rotation of the drive box, a worm gear is fixedly connected to the outside of the rotating shaft, and the worm matches the worm gear; the outside of the rotating shaft is fixedly connected to a spur gear, and a rack is slidably connected to the interior of the drive box, and the spur gear matches the rack; the bottom of the rack is fixedly connected to a limiting shaft, and a limiting hole is opened on the top of the piston body, and the limiting shaft is plugged into the limiting hole.

[0006] Furthermore, a drive motor is fixedly mounted on the outer wall of the drive box, and an output shaft of the drive motor is fixedly connected to the worm.

[0007] Furthermore, a sealing cover is provided on the top of the driving box, a buckle is provided between the sealing cover and the driving box, and the sealing cover is fixedly connected to the driving box through the buckle.

[0008] Furthermore, a first bearing is fixedly installed inside the drive box, and the worm is rotationally connected to the first bearing. A second bearing is fixedly installed inside the drive box, and the rotating shaft is rotationally connected to the second bearing.

[0009] Furthermore, one end of the cylinder body away from the piston rod body is fixedly connected to a rear cylinder cover, and a first sealing ring is provided on the rear cylinder cover.

[0010] Furthermore, a front cylinder cover is fixedly connected to one end of the cylinder body close to the piston rod body.

[0011] Furthermore, a guide sleeve is provided on the front cylinder cover, and a second sealing ring is installed in the guide sleeve.

[0012] The beneficial effects of the present invention are as follows: considering that although the piston rod of the existing guide vane servo can stably control the opening of the guide vane and thus regulate the water flow, when replacing the piston rod in the guide vane servo, the piston is prone to slide and slip, making it difficult to remove the piston rod from the piston, which brings inconvenience to the staff in replacing the piston rod in the guide vane servo.

[0013] In the present invention, when the worm is powered to rotate, the worm is meshed with the worm wheel, thereby driving the worm wheel and the rotating shaft inside the worm wheel to rotate. Because the outer side of the rotating shaft is fixedly connected to a spur gear, when the spur gear is powered to rotate, it will drive the outer rack to move downward. The bottom of the rack is fixedly connected to a limiting shaft, so that the limiting shaft slides inside the drive box and the cylinder body and plugs into the limiting hole opened on the top of the piston body, so that the piston body is limited. At this time, after the staff rotates the piston rod body, the external thread at one end of the piston rod body can be screwed out from the internal thread opened on the piston body, so that the piston rod body can be removed from the piston body. In summary, this kind of guide vane relay piston rod that is easy to replace can limit the piston body, so that when the staff disassembles it, the efficiency of removing the piston rod body from the piston body will not be affected by the sliding of the piston body, and the replacement of the piston rod body is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of a piston rod of a guide vane servo that is easy to replace in the present invention;

[0016] Figure 2 This is a side view of the cross-section structure of a piston rod of a guide vane servo that is easy to replace according to the present invention;

[0017] Figure 3 The utility model is a guide vane servo piston rod that is easy to replace Figure 2 A magnified view of the structure at center A;

[0018] Figure 4 This is a rear view of the cutaway structure of a piston rod of a guide vane servo that is easy to replace according to the utility model.

[0019] Figure 5 The utility model is a guide vane servo piston rod that is easy to replace Figure 4 Enlarged view of the structure at point B in the middle.

[0020] Figure 6 The utility model is a schematic diagram of the explosion structure of a piston rod of a guide vane servo that is easy to replace.

[0021] In the figure: 1. Cylinder body; 2. Movable groove; 3. Piston body; 4. Piston rod body; 5. Internal thread; 6. External thread; 7. Limit hole; 8. Limit shaft; 9. Drive box; 10. Drive motor; 11. Worm; 12. First bearing; 13. Worm gear; 14. Rotating shaft; 15. Second bearing; 16. Spur gear; 17. Rack; 18. Sealing cover; 19. Buckle; 20. Rear cylinder cover; 21. First sealing ring; 22. Front cylinder cover; 24. Guide sleeve; 25. Second sealing ring. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] See also Figures 1-6The utility model provides a technical solution: a guide vane servo piston rod that is easy to replace, including a cylinder body 1, a movable groove 2 is opened inside the cylinder body 1, and the piston body 3 is slidably connected inside the movable groove 2. A piston rod body 4 is provided on one side of the piston body 3, and an external thread 6 is provided at one end of the piston rod body 4 close to the piston body 3. An internal thread 5 is provided inside the piston body 3, and the internal thread 5 matches the external thread 6; the top of the cylinder body 1 is fixedly connected to a drive box 9, and a worm 11 and a rotating shaft 14 are provided inside the drive box 9 for rotation. The outer side of the rotating shaft 14 is fixedly connected to a spur gear 16, and a rack 17 is slidably connected to the drive box 9, and the spur gear 16 matches the rack 17; the bottom of the rack 17 is fixedly connected to a limiting shaft 8, and a limiting hole 7 is opened on the top of the piston body 3, and the limiting shaft 8 is plugged into the limiting hole 7.

[0024] When the worm 11 receives power to rotate, it meshes with the worm wheel 13, thereby driving the worm wheel 13 and the rotating shaft 14 inside the worm wheel 13 to rotate. Furthermore, because the outer side of the rotating shaft 14 is fixedly connected to a spur gear 16, when the spur gear 16 receives power to rotate, it drives the outer rack 17 to move downward. The bottom of the rack 17 is fixedly connected to a limit shaft 8, allowing the limit shaft 8 to slide within the drive box 9 and the cylinder body 1 and insert into the limit hole 7 opened at the top of the piston body 3, so that the piston body 3 is restrained. At this time, after the staff rotates the piston rod body 4, the external thread 6 at one end of the piston rod body 4 can be unscrewed from the internal thread 5 opened on the piston body 3, allowing the piston rod body 4 to be removed from the piston body 3. In summary, this easy-to-replace guide vane relay piston rod can restrain the piston body 3, so that when the staff removes it, the piston body 3 will not slide and affect the efficiency of removing the piston rod body 4 from the piston body 3, making it convenient to replace the piston rod body 4.

[0025] A driving motor 10 is fixedly mounted on the outer wall of the driving box 9 , and an output shaft of the driving motor 10 is fixedly connected to a worm 11 .

[0026] The staff can start the driving motor 10 so that the output shaft of the driving motor 10 drives the worm 11 to rotate, so that the worm 11 can obtain power.

[0027] A sealing cover 18 is provided on the top of the driving box 9 , and a buckle 19 is provided between the sealing cover 18 and the driving box 9 . The sealing cover 18 is fixedly connected to the driving box 9 via the buckle 19 .

[0028] The staff can open the sealing cover 18 on the top of the drive box 9 through the buckle 19, which is convenient for the staff to maintain the components inside the drive box 9 at a later time.

[0029] A first bearing 12 is fixedly installed inside the drive box 9 , and the worm 11 is rotatably connected to the first bearing 12 . A second bearing 15 is fixedly installed inside the drive box 9 , and the rotating shaft 14 is rotatably connected to the second bearing 15 .

[0030] When the worm 11 receives power, it rotates in the first bearing 12, which can improve the rotation effect of the worm 11. In addition, when the rotating shaft 14 receives power, it rotates in the second bearing 15, so that the second bearing 15 can improve the rotation effect of the rotating shaft 14.

[0031] One end of the cylinder body 1 away from the piston rod body 4 is fixedly connected to a rear cylinder cover 20 , and a first sealing ring 21 is provided on the rear cylinder cover 20 .

[0032] The rear cylinder cover 20 can seal the end of the cylinder body 1 away from the piston rod body 4. In addition, the first sealing ring 21 can improve the sealing performance of the cylinder body 1.

[0033] One end of the cylinder body 1 close to the piston rod body 4 is fixedly connected to a front cylinder cover 22 .

[0034] The front cylinder cover 22 is sealed at one end close to the piston rod body 4 .

[0035] A guide sleeve 24 is provided on the front cylinder cover 22 , and a second sealing ring 25 is installed in the guide sleeve 24 .

[0036] The main function of the guide sleeve 24 is to provide stable guidance to prevent the piston rod from deflecting or shaking during movement, thereby ensuring the stability and accuracy of the piston rod.

[0037] Working Principle: When using this easy-to-replace guide vane servo piston rod, the staff can start the drive motor 10, so that the output shaft of the drive motor 10 will drive the worm 11 to rotate. Because the worm 11 is meshed with the worm wheel 13, it will drive the worm wheel 13 and the rotating shaft 14 inside the worm wheel 13 to rotate. Because the outer side of the rotating shaft 14 is fixedly connected to the spur gear 16, when the spur gear 16 is powered and rotated, it will drive the outer rack 17 to move downward. The bottom of the rack 17 is fixedly connected to the limit shaft 8, so that the limit shaft 8 slides inside the drive box 9 and the cylinder body 1 and is inserted into the limit hole 7 opened at the top of the piston body 3, so that the piston body 3 is limited. At this time, after the staff rotates the piston rod body 4, the external thread 6 at one end of the piston rod body 4 can be unscrewed from the internal thread 5 opened on the piston body 3, so that the piston rod body 4 can be removed from the piston body 3. In summary, this easy-to-replace guide vane servo piston rod can limit the piston body 3, so that when the staff disassembles it, the sliding of the piston body 3 will not affect the efficiency of removing the piston rod body 4 from the piston body 3, making it convenient to replace the piston rod body 4.

[0038] Furthermore, the piston rod of this easily replaceable guide vane servo utilizes a worm 11 and worm gear 13 transmission structure to drive the rotation shaft 14. The spur gear 16 on the outside of the rotation shaft 14 drives the rack 17 and the limiting shaft 8 to move, thereby driving the limiting shaft 8 to be inserted into the limiting hole 7, thereby retaining the piston body 3. Furthermore, the worm 11 and worm gear 13 transmission structure is self-locking, preventing the rotation shaft 14 from rotating backwards, thereby preventing the spur gear 16 from rotating backwards. This allows the limiting shaft 8 to be stably inserted into the limiting hole 7, allowing the piston body 3 to remain in position without slipping or rotating, thereby improving the replacement efficiency of the piston rod body 4.

[0039] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0040] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A guide vane servo piston rod that is easy to replace, comprising a cylinder body (1), characterized in that: The cylinder body (1) is provided with a movable groove (2) inside, and a piston body (3) is slidably connected inside the movable groove (2). A piston rod body (4) is provided on one side of the piston body (3). An external thread (6) is provided on one end of the piston rod body (4) close to the piston body (3). An internal thread (5) is provided inside the piston body (3), and the internal thread (5) matches the external thread (6). The top of the cylinder body (1) is fixedly connected to a drive box (9), and a worm (11) is provided inside the drive box (9) for rotation. The outer side of the rotating shaft (14) is fixedly connected to a worm gear (13), and the worm (11) matches the worm gear (13); the outer side of the rotating shaft (14) is fixedly connected to a spur gear (16), the interior of the driving box (9) is slidably connected to a rack (17), and the spur gear (16) matches the rack (17); the bottom of the rack (17) is fixedly connected to a limiting shaft (8), and a limiting hole (7) is provided on the top of the piston body (3), and the limiting shaft (8) is plugged into the limiting hole (7).

2. The easily replaceable guide vane servo piston rod according to claim 1, characterized in that: A drive motor (10) is fixedly mounted on the outer wall of the drive box (9), and an output shaft of the drive motor (10) is fixedly connected to the worm (11).

3. The easily replaceable guide vane servo piston rod according to claim 1, characterized in that: A sealing cover (18) is provided on the top of the driving box (9), a buckle (19) is provided between the sealing cover (18) and the driving box (9), and the sealing cover (18) is fixedly connected to the driving box (9) via the buckle (19).

4. The easily replaceable guide vane servo piston rod according to claim 1, characterized in that: A first bearing (12) is fixedly installed inside the drive box (9), and the worm (11) is rotationally connected to the first bearing (12). A second bearing (15) is fixedly installed inside the drive box (9), and the rotating shaft (14) is rotationally connected to the second bearing (15).

5. The easily replaceable guide vane servo piston rod according to claim 1, characterized in that: One end of the cylinder body (1) away from the piston rod body (4) is fixedly connected to a rear cylinder cover (20), and a first sealing ring (21) is provided on the rear cylinder cover (20).

6. The easily replaceable guide vane servo piston rod according to claim 1, characterized in that: One end of the cylinder body (1) close to the piston rod body (4) is fixedly connected to a front cylinder cover (22).

7. The easily replaceable guide vane servo piston rod according to claim 6, characterized in that: A guide sleeve (24) is provided on the front cylinder cover (22), and a second sealing ring (25) is installed in the guide sleeve (24).

Images