Hydraulic cylinder with speed increasing function

Abstract

The utility model relates to a hydraulic cylinder with a speed increasing function, and belongs to the field of hydraulic cylinders, the hydraulic cylinder comprises a cylinder barrel, a cylinder tail and a cylinder head, one end of the cylinder barrel is communicated with the cylinder tail, the other end of the cylinder barrel is communicated with the cylinder head, a piston rod is slidably connected in the cylinder barrel, and a speed increasing assembly used for increasing the extending speed of the piston rod is arranged on the cylinder tail. The speed increasing assembly extends into the piston rod. The hydraulic cylinder has the effect of increasing the extending speed of the piston rod, and therefore the working efficiency of the hydraulic cylinder is improved.

Description

Technical Field

[0001] The present application relates to the field of hydraulic cylinders, and in particular to a hydraulic cylinder with a speed increasing function. Background Art

[0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion.

[0003] The hydraulic cylinder mainly includes a cylinder body, a piston rod and a piston. The piston is slidably connected in the cylinder body, and the piston rod is fixed to the piston. The cylinder body is provided with a first liquid inlet hole and a second liquid inlet hole, which are respectively located at the two ends of the cylinder body. When the hydraulic cylinder is in use, the liquid enters the cylinder body from the first liquid inlet hole to apply pressure to one side of the piston, and the piston controls the movement of the piston rod to realize the function of converting hydraulic energy into mechanical energy. When it is necessary to control the piston rod to reset, the liquid entering from the first liquid inlet hole is discharged from the cylinder body, and at the same time, the liquid enters the cylinder body from the second liquid inlet hole. The liquid applies pressure to the other side of the piston, and the piston can drive the piston rod to reset.

[0004] When the hydraulic cylinder is actually used, the contact area between the liquid entering the cylinder body from the first liquid inlet hole and the piston is larger than the contact area between the liquid entering the cylinder body from the second liquid inlet hole and the piston, which can easily make the speed of the piston rod extending out of the cylinder body lower than the speed of the piston rod retracting into the cylinder body, thereby affecting the use efficiency of the hydraulic cylinder, so it needs to be improved. Utility Model Content

[0005] In order to improve the above problems, the present application provides a hydraulic cylinder with a speed increasing function.

[0006] The present application provides a hydraulic cylinder with a speed increasing function, which adopts the following technical solution:

[0007] A hydraulic cylinder with an increasing speed function comprises a cylinder barrel, a cylinder tail and a cylinder head, wherein one end of the cylinder barrel is connected to the cylinder tail and the other end is connected to the cylinder head, a piston rod is slidably connected in the cylinder barrel, an increasing speed component for increasing the extension speed of the piston rod is provided on the cylinder tail, and the increasing speed component extends into the piston rod.

[0008] By adopting the above technical solution, when the hydraulic cylinder is in use, the speed increasing assembly increases the speed at which the piston rod extends out of the cylinder barrel, thereby improving the overall working efficiency of the hydraulic cylinder.

[0009] Preferably, the speed increasing assembly includes a speed increasing rod and a connecting plate, the speed increasing rod and the connecting plate are connected, a first speed increasing hole is formed on the connecting plate, a second speed increasing hole is formed on the speed increasing rod, the second speed increasing hole is communicated with the first speed increasing hole, a side of the connecting plate close to the speed increasing rod is connected to a side of the cylinder tail away from the cylinder barrel, a speed increasing groove is formed on the piston rod, and the speed increasing rod extends into the speed increasing groove.

[0010] By adopting the above technical solution, when the hydraulic cylinder needs to be used, the external liquid enters the first speed-increasing hole, and then enters the speed-increasing groove through the second speed-increasing hole, so that the liquid contacts the inner wall of the speed-increasing groove to provide further thrust to the piston rod, thereby realizing the function of increasing the movement speed of the piston rod, thereby improving the working efficiency of the hydraulic cylinder.

[0011] Preferably, a connecting groove is provided on the piston rod, a first connecting tube is provided in the connecting groove, a second connecting tube is provided on the side of the first connecting tube away from the cylinder tail, the first connecting tube and the second connecting tube are connected, the outer wall of the second connecting tube abuts against the inner wall of the speed increasing groove, and the speed increasing rod abuts against the inner walls of the first connecting tube and the second connecting tube.

[0012] By adopting the above technical solution, when the speed-increasing rod needs to be inserted into the speed-increasing groove, the worker inserts the second connecting tube into the speed-increasing groove, and after the first connecting tube abuts against the inner wall of the connecting groove, the first connecting tube is fixed to the piston rod, and the connection between the first connecting tube, the second connecting tube and the piston rod is completed. The worker then sequentially passes the speed-increasing rod through the first connecting tube and the second connecting tube to insert the speed-increasing rod into the speed-increasing groove. At this time, the first connecting tube and the second connecting tube provide guidance and support for the speed-increasing rod, thereby improving the position accuracy between the speed-increasing rod and the piston rod, so that the speed-increasing rod can subsequently increase the moving speed of the piston rod more stably.

[0013] Preferably, a clearance hole is opened on the side of the cylinder tail facing away from the cylinder barrel, the speed increasing rod is arranged in the clearance hole, and a plurality of first sealing rings are embedded on the outer side of the speed increasing rod, and each of the first sealing rings abuts against the inner wall of the clearance hole.

[0014] By adopting the above technical solution, when workers install the speed-increasing rod, they embed each first sealing ring on the speed-increasing rod, and then insert the speed-increasing rod into the clearance hole, so that each first sealing ring abuts against the inner wall of the clearance hole. At this time, under the action of each first sealing ring, the sealing between the speed-increasing rod and the cylinder tail is increased, so that the hydraulic cylinder is not prone to leakage, so that the speed-increasing rod can stably increase the moving speed of the piston rod.

[0015] Preferably, a first bidirectional step seal is embedded in the inner wall of the first connecting tube, and the first bidirectional step seal abuts against the speed increasing rod.

[0016] By adopting the above technical solution, the first bidirectional step seal increases the sealing between the first connecting tube and the speed increasing rod, making it difficult for the speed increasing rod to leak when conveying liquid, thereby further improving the stability of the speed increasing rod in increasing the moving speed of the piston rod.

[0017] Preferably, a second sealing ring is embedded in the inner wall of the second connecting tube, and the second sealing ring abuts against the speed increasing rod.

[0018] By adopting the above technical solution, under the action of the second sealing ring, the sealing between the second connecting tube and the speed increasing rod is increased, making it difficult for leakage to occur between the speed increasing rod and the second connecting tube, so that the speed increasing rod can more stably increase the moving speed of the piston rod.

[0019] Preferably, a second two-way step seal is embedded in the inner wall of the cylinder head, and the second two-way step seal abuts against the piston rod.

[0020] By adopting the above technical solution, the second two-way step seal improves the sealing between the piston rod and the cylinder head, making it less likely for the hydraulic cylinder to leak, so that the piston rod can move more stably.

[0021] Preferably, a third sealing ring is embedded in the outer wall of the cylinder head, and the third sealing ring abuts against the inner wall of the cylinder barrel.

[0022] By adopting the above technical solution, the third sealing ring improves the sealing between the cylinder barrel and the cylinder head, further reduces the leakage of the hydraulic cylinder, and thus further improves the stability of the piston rod during operation.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. By setting the connecting plate and the speed increasing rod, when the piston rod needs to extend out of the hydraulic cylinder, the external liquid enters the speed increasing groove from the first speed increasing hole and the second speed increasing hole to provide assistance to the piston rod, thereby realizing the possibility of increasing the moving speed of the piston rod, thereby improving the working efficiency of the hydraulic cylinder;

[0025] 2. By providing the first connecting tube and the second connecting tube, the first connecting tube and the second connecting tube provide support and guidance for the speed-increasing rod, thereby improving the position accuracy between the speed-increasing rod and the piston rod, and at the same time providing convenience for the speed-increasing rod to stably increase the moving speed of the piston rod;

[0026] 3. By setting the first two-way step seal and the second sealing ring, the sealing between the speed-increasing rod and the first connecting tube and the second connecting tube is increased, making it less likely for leakage to occur between the speed-increasing rod and the first connecting tube and the second connecting tube, further improving the stability of the speed-increasing rod in increasing the moving speed of the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0028] Explanation of the reference numerals in the accompanying drawings: 1. Cylinder barrel; 2. Cylinder tail; 21. Give way hole; 3. Cylinder head; 31. Second two-way seal; 32. Third sealing ring; 33. Second rod seal; 4. Piston rod; 41. Speed ​​increasing groove; 42. Connecting groove; 43. First connecting tube; 431. First two-way seal; 44. Second connecting tube; 441. Second sealing ring; 442. Sealing ring; 45. First rod seal; 46. Fourth sealing ring; 5. Speed ​​increasing assembly; 51. Speed ​​increasing rod; 511. Second speed increasing hole; 512. First sealing ring; 52. Connecting plate; 521. First speed increasing hole. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1 This application is described in further detail.

[0030] The embodiment of the present application discloses a hydraulic cylinder with a speed increasing function. Figure 1 A hydraulic cylinder with a speed-increasing function comprises a cylinder barrel 1, a cylinder tail 2 and a cylinder head 3, wherein one end of the cylinder barrel 1 is connected to the cylinder tail 2 and the other end is connected to the cylinder head 3. A piston rod 4 is slidably connected in the cylinder barrel 1, and the piston rod 4 extends out of the cylinder head 3. A speed-increasing component 5 for increasing the extension speed of the piston is arranged on the cylinder tail 2, and the speed-increasing component 5 extends into the piston rod 4. During the use of the hydraulic cylinder, the speed-increasing component 5 is started and provides assistance to the piston rod 4 to increase the moving speed of the piston rod 4, thereby increasing the frequency of extending and retracting the piston rod 4, and thus improving the working efficiency of the hydraulic cylinder.

[0031] Reference Figure 1 The speed increasing assembly 5 includes a speed increasing rod 51 and a connecting plate 52. The speed increasing rod 51 and the connecting plate 52 are fixed to each other. The side of the connecting plate 52 close to the speed increasing rod 51 is fixed to the side of the cylinder tail 2 away from the cylinder barrel 1. The connecting plate 52 is provided with a first speed increasing hole 521. The speed increasing rod 51 is provided with a second speed increasing hole 511 connected to the first speed increasing hole 521 along its own axial direction. The piston rod 4 is provided with a speed increasing groove 41. The speed increasing rod 51 extends into the speed increasing groove 41. The cylinder tail 2 is provided with a liquid inlet hole connected to the cylinder barrel 1.

[0032] When the hydraulic cylinder is in use, the external liquid enters the cylinder tail 2 and the cylinder barrel 1 from the liquid inlet hole to apply thrust to the piston rod 4, and the piston rod 4 can move in the direction away from the cylinder head 3. At the same time, the external liquid enters the first speed-increasing hole 521, passes through the second speed-increasing hole 511 and enters the speed-increasing groove 41. After the external liquid contacts the inner wall of the speed-increasing groove 41, it further applies thrust to the piston rod 4 to realize the function of increasing the moving speed of the piston rod 4, thereby improving the working efficiency of the hydraulic cylinder.

[0033] Reference Figure 1In order to facilitate the installation of the speed increasing rod 51, the speed increasing rod 51 and the connecting plate 52 are integrally formed, and the inner diameters of the first speed increasing hole 521 and the second speed increasing hole 511 are the same. A clearance hole 21 is provided on the side of the cylinder tail 2 away from the cylinder barrel 1, and the speed increasing rod 51 is arranged in the clearance hole 21, and the connecting plate 52 is connected to the cylinder tail 2 by bolts. A plurality of first sealing rings 512 are arranged on the speed increasing rod 51, and each of the first sealing rings 512 abuts against the inner wall of the clearance hole 21.

[0034] When the speed increasing rod 51 needs to be installed, the worker first installs each first sealing ring 512 on the speed increasing rod 51, and then passes the speed increasing rod 51 through the clearance hole 21, so that the speed increasing rod 51 is inserted into the speed increasing groove 41. After the connecting plate 52 abuts against the cylinder tail 2, each first sealing ring 512 abuts against the inner wall of the clearance hole 21, and the worker then uses bolts to fix the connecting plate 52 and the cylinder tail 2, and the installation of the speed increasing rod 51 is completed, thereby facilitating the installation of the speed increasing rod 51. At the same time, under the action of the first sealing ring 512, the sealing between the speed increasing rod 51 and the cylinder tail 2 is increased, and the leakage of the hydraulic cylinder is reduced, so that the hydraulic cylinder can work more stably.

[0035] Reference Figure 1 In order to improve the working stability of the speed increasing rod 51, a connecting groove 42 is provided on the piston rod 4, and a first connecting cylinder 43 is provided in the connecting groove 42. The first connecting cylinder 43 is connected to the piston rod 4 by bolts. A second connecting cylinder 44 is coaxially fixed to the side of the first connecting cylinder 43 away from the cylinder tail 2, and the inner diameter of the second connecting cylinder 44 is the same as the inner diameter of the first connecting cylinder 43, and the outer wall of the second connecting cylinder 44 abuts against the inner wall of the speed increasing groove 41. The speed increasing rod 51 passes through the first connecting cylinder 43 and the second connecting cylinder 44 in sequence, and the inner wall of the first connecting cylinder 43 and the inner wall of the second connecting cylinder 44 both abut against the outer wall of the speed increasing rod 51.

[0036] The first connecting tube 43 and the second connecting tube 44 are integrally formed, and a first two-way seal 431 is embedded in the inner wall of the first connecting tube 43, and the first two-way seal 431 abuts against the speed increasing rod 51. A second sealing ring 441 is embedded in the inner wall of the second connecting tube 44, and the second sealing ring 441 abuts against the speed increasing rod 51. A sealing ring 442 is embedded in the outer wall of the second connecting tube 44, and the sealing ring 442 abuts against the inner wall of the speed increasing groove 41, so that the liquid entering the speed increasing groove 41 is not easy to leak from the gap between the second connecting tube 44 and the speed increasing groove 41.

[0037] When the first connecting cylinder 43 and the second connecting cylinder 44 need to be installed, the worker inserts the second connecting cylinder 44 into the speed increasing groove 41 so that the outer wall of the second connecting cylinder 44 abuts against the inner wall of the speed increasing groove 41. After the first connecting cylinder 43 abuts against the inner wall of the connecting groove 42, the worker uses bolts to fix the first connecting cylinder 43 and the piston to complete the installation of the first connecting cylinder 43 and the second connecting cylinder 44, thereby facilitating the installation of the first connecting cylinder 43 and the second connecting cylinder 44. At this time, the first two-way step seal 431 and the second sealing ring 441 are both abutted against the speed increasing rod 51, which improves the sealing between the first connecting cylinder 43 and the second connecting cylinder 44 and the speed increasing rod 51, reduces the leakage of the liquid in the speed increasing groove 41, and thus improves the stability of the speed increasing rod 51 in increasing the moving speed of the piston rod 4.

[0038] When the worker installs the speed increasing rod 51, the speed increasing rod 51 passes through the first connecting tube 43 and the second connecting tube 44 in sequence and enters the speed increasing groove 41. At this time, the speed increasing rod 51 abuts against the inner wall of the first connecting tube 43 and the inner wall of the second connecting tube 44 at the same time. The first connecting tube 43 and the second connecting tube 44 can provide support and guidance for the speed increasing rod 51, so that the speed increasing rod 51 can subsequently stably transport the external liquid to the speed increasing groove 41 and provide assistance to the piston rod 4.

[0039] Reference Figure 1 A first rod seal 45 is embedded at the connection between the first connecting tube 43 and the second connecting tube 44. The first rod seal 45 abuts against the outer wall of the speed-increasing rod 51. The first rod seal 45 further improves the sealing between the first connecting tube 43 and the second connecting tube 44 and the speed-increasing rod 51, thereby further reducing the leakage of the liquid in the speed-increasing groove 41, so that the liquid passed into the speed-increasing rod 51 can more stably increase the moving speed of the piston rod 4.

[0040] Reference Figure 1 A second two-way step seal 31 is embedded in the inner wall of the cylinder head 3 , and the second two-way step seal 31 abuts against the piston rod 4 . A third sealing ring 32 is embedded in the outer wall of the cylinder head 3 , and the third sealing ring 32 abuts against the inner wall of the cylinder barrel 1 .

[0041] The second two-way step seal 31 increases the sealing between the cylinder head 3 and the piston rod 4, and the third sealing ring 32 increases the sealing between the cylinder barrel 1 and the cylinder head 3, making it less likely for liquid leakage to occur between the cylinder head 3 and the cylinder barrel 1 and between the cylinder head 3 and the piston rod 4, so that the hydraulic cylinder can be used more stably.

[0042] Reference Figure 1A second rod seal 33 is embedded in the inner wall of the cylinder head 3, and the second rod seal 33 abuts against the piston rod 4. The second rod seal 33 further increases the sealing between the cylinder head 3 and the piston rod 4, further reduces the phenomenon of liquid leakage between the cylinder head 3 and the piston rod 4, thereby further improving the stability of the hydraulic cylinder during operation.

[0043] Reference Figure 1 The outer wall of the piston rod 4 is provided with a fourth sealing ring 46, and the first sealing ring 512 abuts against the inner wall of the cylinder 1. The fourth sealing ring 46 prevents the liquid inside the hydraulic cylinder from leaking when the piston rod 4 moves, further improving the stability of the hydraulic cylinder when working. The first sealing ring 512, the second sealing ring 441, the sealing ring 442, the third sealing ring 32 and the fourth sealing ring 46 are all made of silicone, which has good sealing ability, so that the hydraulic cylinder can work more stably.

[0044] The implementation principle of the hydraulic cylinder with a speed-increasing function in the embodiment of the present application is as follows: during the use of the hydraulic cylinder, the external liquid enters the cylinder tail 2 and the cylinder barrel 1 to apply thrust to the piston rod 4. At the same time, the external liquid enters the speed-increasing groove 41 from the first speed-increasing hole 521 and the second speed-increasing hole 511. After the external liquid contacts the inner wall of the speed-increasing groove 41, it further applies thrust to the piston rod 4 to achieve the function of increasing the moving speed of the piston rod 4, thereby improving the working efficiency of the hydraulic cylinder.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A hydraulic cylinder with speed increasing function, Features: The invention comprises a cylinder barrel (1), a cylinder tail (2) and a cylinder head (3); one end of the cylinder barrel (1) is connected to the cylinder tail (2), and the other end is connected to the cylinder head (3); a piston rod (4) is slidably connected in the cylinder barrel (1); a speed increasing component (5) for increasing the extension speed of the piston rod (4) is provided on the cylinder tail (2); and the speed increasing component (5) extends into the piston rod (4).

2. A hydraulic cylinder with a speed increasing function according to claim 1, Features: The speed increasing assembly (5) comprises a speed increasing rod (51) and a connecting plate (52), wherein the speed increasing rod (51) and the connecting plate (52) are connected, wherein a first speed increasing hole (521) is provided on the connecting plate (52), wherein a second speed increasing hole (511) is provided on the speed increasing rod (51), wherein the second speed increasing hole (511) is connected to the first speed increasing hole (521), wherein a side of the connecting plate (52) close to the speed increasing rod (51) is connected to a side of the cylinder tail (2) away from the cylinder barrel (1), wherein a speed increasing groove (41) is provided on the piston rod (4), and wherein the speed increasing rod (51) extends into the speed increasing groove (41).

3. A hydraulic cylinder with speed increasing function according to claim 2, Features: The piston rod (4) is provided with a connecting groove (42), a first connecting tube (43) is provided in the connecting groove (42), a second connecting tube (44) is provided on the side of the first connecting tube (43) away from the cylinder tail (2), the first connecting tube (43) and the second connecting tube (44) are connected, the outer wall of the second connecting tube (44) abuts against the inner wall of the speed increasing groove (41), and the speed increasing rod (51) abuts against the inner walls of the first connecting tube (43) and the second connecting tube (44).

4. A hydraulic cylinder with speed increasing function according to claim 2, Features: A clearance hole (21) is provided on the side of the cylinder tail (2) facing away from the cylinder barrel (1), the speed increasing rod (51) is arranged in the clearance hole (21), and a plurality of first sealing rings (512) are embedded on the outer side of the speed increasing rod (51), and each of the first sealing rings (512) is in contact with the inner wall of the clearance hole (21).

5. A hydraulic cylinder with speed increasing function according to claim 3, Features: A first bidirectional step seal (431) is embedded in the inner wall of the first connecting tube (43), and the first bidirectional step seal (431) is in contact with the speed increasing rod (51).

6. A hydraulic cylinder with speed increasing function according to claim 5, Features: A second sealing ring (441) is embedded in the inner wall of the second connecting tube (44), and the second sealing ring (441) is in contact with the speed increasing rod (51).

7. A hydraulic cylinder with speed increasing function according to claim 1, Features: A second two-way step seal (31) is embedded in the inner wall of the cylinder head (3), and the second two-way step seal (31) is in contact with the piston rod (4).

8. A hydraulic cylinder with speed increasing function according to claim 7, Features: A third sealing ring (32) is embedded in the outer wall of the cylinder head (3), and the third sealing ring (32) abuts against the inner wall of the cylinder barrel (1).

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