Angle adjusting type double-rack oscillating cylinder

Abstract

The utility model relates to an angle adjusting type double-rack oscillating cylinder which comprises a box body, and a first cylinder barrel and a second cylinder barrel are coaxially assembled on the two sides of the box body to form a cylinder body with the interior communicated. The two cylinder bodies are arranged in parallel at an interval, a piston rod is assembled in the single cylinder body in a sliding mode, a gear is rotationally installed in the box body and located between the two piston rods, and the two sides, located on the same diameter in the circumferential direction, of the gear are assembled with the two piston rods in a tooth-shaped meshing mode respectively; a cylinder bottom is mounted at one end of a cylinder barrel in each cylinder body, and a cylinder head is mounted at each of two ends of the cylinder barrel; an adjusting screw rod is inwards assembled at the end part of the cylinder head; in actual use, the swing angle of the swing cylinder can be adjusted by screwing in and screwing out the adjusting screw rods on the cylinder heads of the two cylinder bodies, adjusting the moving distance of the piston rod in the axial direction and adjusting the rotating angle of the gear, operation is convenient, the swing cylinder is particularly suitable for adjustment and maintenance operation in actual use, the flexibility of actual use is effectively improved, and practicability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of swing cylinders, in particular to an angle-adjustable double-rack swing cylinder. Background Art

[0002] The principle of a rack-and-pinion oscillating hydraulic cylinder is to convert the reciprocating motion of the hydraulic cylinder into forward and reverse oscillating rotation of the gear shaft through the rack, while simultaneously converting the thrust of the reciprocating cylinder into output torque on the gear shaft. Because the gear shaft's oscillation angle is proportional to the length of the rack, the gear shaft's oscillation angle can be arbitrarily selected and can be greater than 360°.

[0003] In the prior art, the length of the rack and the maximum travel of the rack along the length direction are fixed, so that the maximum swing angle of the gear and the gear shaft is fixed, and fine-tuning cannot be performed according to actual needs, which is inconvenient for actual adjustment and maintenance operations. Utility Model Content

[0004] In order to solve the above problems, the present application provides a rationally structured angle-adjustable double-rack swing cylinder, thereby realizing the adjustment of the swing angle of the swing cylinder. It is easy to operate and is particularly suitable for adjustment and maintenance operations during actual use, effectively improving the flexibility of actual use and having good practicality.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] An angle-adjustable double-rack swing cylinder comprises a box body, with cylinder barrel one and cylinder barrel two coaxially mounted on both sides of the box body, forming an internally connected cylinder body; the cylinder body comprises two parallel and spaced apart arrangements, a piston rod being slidably mounted inside a single cylinder body, a gear being rotatably mounted inside the box body, the gear being located between the two piston rods, and the gear being circumferentially located on both sides of the same diameter and being tooth-engaged with the two piston rods; a cylinder bottom is respectively mounted on one end of the cylinder barrel in the two cylinder bodies, and a cylinder head is respectively mounted on both ends of the cylinder barrel; an adjusting screw is mounted inwardly on the end of the cylinder head.

[0007] As a further improvement of the above technical solution:

[0008] Liquid flows in and out of the cylinder barrels 2 of the two cylinder bodies on the same side in turn, and the engagement between the piston rods and the gears causes the two piston rods to move in opposite directions along their respective cylinder bodies at the same time.

[0009] The inner wall of the box between the first cylinder and the second cylinder is equipped with a bearing bush, and both ends of the piston rod are limited by the bearing bush and are respectively located in the first cylinder and the second cylinder.

[0010] The ends of the piston rods located in cylinder one and cylinder two are respectively fitted with guide sleeves, the outer diameter of the guide sleeves is larger than the inner diameter of the bearing bush, and a sealing ring is pressed between the circumferential outer wall of the guide sleeve and the corresponding inner wall of cylinder one or cylinder two.

[0011] A fixing screw is installed at the end of the piston rod located in the cylinder barrel along the axial center.

[0012] A buffer rod is installed at the end of the piston rod located in the second cylinder barrel. The buffer rod is in a T-shaped structure toward the cylinder head. The end of the buffer rod extends into the cylinder head and abuts against the inner end of the adjusting screw.

[0013] The axial cross section of the adjusting screw is in a T-shaped structure, and a stepped hole for assembling the adjusting screw is provided on the cylinder head along the axial direction.

[0014] The large end of the adjusting screw is threadedly connected to the large hole portion of the step hole, and an O-ring is installed between the small end of the adjusting screw and the small hole portion of the step hole.

[0015] An annular groove for accommodating an O-ring is provided on the inner wall surface of the small hole portion of the step hole, in which an O-ring and a retaining ring are installed in parallel; an elastic retaining ring for the hole is installed on the large hole portion of the step hole located outside the large end of the adjusting screw.

[0016] The hole elastic circlip is annular in structure, and the inner diameter of the hole elastic circlip is smaller than the diameter of the large end of the adjusting screw; a hole matching with an external tool is opened in the center of the large end of the adjusting screw.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The utility model can adjust the screw in and out of the two cylinder heads to adjust the axial movement distance of the piston rod and the rotation angle of the gear to achieve the adjustment of the swing angle of the swing cylinder. The operation is convenient, especially suitable for adjustment and maintenance operations during actual use, effectively improving the flexibility of actual use and having good practicality.

[0019] The utility model also has the following advantages:

[0020] The buffer rod extends into the cylinder head and abuts against the adjusting screw to achieve the limit of the swing cylinder when it swings to the maximum angle; by adjusting the axial direction of the adjusting screw, the actual position of the buffer rod when it abuts is adjusted, thereby adjusting the angle of the gear driven by the piston rod, thereby achieving the adjustment of the swing angle of the swing cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the present utility model.

[0022] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0023] Among them: 1. Fixed screw; 2. Cylinder barrel 1; 3. Piston rod; 4. Box body; 5. Guide sleeve; 6. Buffer rod; 7. Cylinder barrel 2; 8. Adjusting screw; 9. Cylinder head; 10. Gear; 11. Elastic circlip for hole; 12. O-ring; 13. Circlip; 21. Cylinder bottom. DETAILED DESCRIPTION

[0024] The specific implementation of the present utility model will be described below with reference to the accompanying drawings.

[0025] like Figure 1 As shown, an angle-adjustable double-rack swing cylinder of this embodiment includes a box body 4, and cylinder barrel 1 2 and cylinder barrel 2 7 are coaxially mounted on both sides of the box body 4 to form an internally communicated cylinder body; the cylinder body includes two parallel and spaced apart arrangements, a piston rod 3 is slidingly mounted inside a single cylinder body, a gear 10 is rotatably mounted inside the box body 4, the gear 10 is located between the two piston rods 3, and the gear 10 is circumferentially located on both sides of the same diameter and is tooth-engaged with the two piston rods 3; the ends of cylinder barrel 1 2 in the two cylinder bodies are respectively mounted with cylinder bottoms 21, and the ends of cylinder barrel 2 7 are respectively mounted with cylinder heads 9; the ends of the cylinder head 9 are inwardly mounted with an adjusting screw 8.

[0026] In this embodiment, the swing angle of the swing cylinder can be adjusted by rotating the adjusting screw 8 on the two cylinder heads 9 in and out, adjusting the axial movement distance of the piston rod 3, and adjusting the rotation angle of the gear 10. The operation is convenient and is particularly suitable for adjustment and maintenance operations during actual use.

[0027] Liquid flows in and out of the cylinder barrel 2 7 of the two cylinder bodies on the same side in turn, and the engagement between the piston rod 3 and the gear 10 causes the two piston rods 3 to move in opposite directions along their respective cylinder bodies at the same time.

[0028] In this embodiment, the liquid inlet and outlet of the second cylinder 7 are arranged on the cylinder head 9, and the liquid inlet and outlet are located at the junction of the adjusting screw 8 and the buffer rod 6 at the end of the piston rod 3.

[0029] The inner wall of the box body 4 located between cylinder barrel 1 2 and cylinder barrel 2 7 is equipped with bearings, and the two ends of the piston rod 3 are limited by the bearings and are respectively located in cylinder barrel 1 2 and cylinder barrel 2 7; this effectively ensures that the reciprocating movement of the piston rod 3 in the cylinder body is output through the gear 10 to swing back and forth.

[0030] The ends of the piston rod 3 located in cylinder barrel 1 2 and cylinder barrel 2 7 are respectively fitted with guide sleeves 5. The outer diameter of the guide sleeve 5 is larger than the inner diameter of the bearing shell. The matching of the guide sleeve 5 and the bearing shell realizes the limitation of the axial movement of the piston rod 3. A sealing ring is pressed between the circumferential outer wall of the guide sleeve 5 and the corresponding inner wall of cylinder barrel 1 2 or the inner wall of cylinder barrel 2 7.

[0031] A fixed screw 1 is installed at the end of the piston rod 3 located in the cylinder barrel 2 along the axial center.

[0032] A buffer rod 6 is installed at the end of the piston rod 3 located in the cylinder barrel 7. The buffer rod 6 has a T-shaped structure toward the cylinder head 9. The end of the buffer rod 6 extends into the cylinder head 9 and abuts against the inner end of the adjusting screw 8.

[0033] In this embodiment, the buffer rod 6 extends into the cylinder head 9 and abuts against the adjusting screw 8 to achieve the limit of the swing cylinder when it swings to the maximum angle; by adjusting the axial direction of the adjusting screw 8, the actual position of the buffer rod 6 when it abuts is adjusted, thereby adjusting the angle of rotation of the gear 10 driven by the piston rod 3, thereby achieving the adjustment of the swing angle of the swing cylinder.

[0034] like Figure 2 As shown, the axial cross section of the adjusting screw 8 is T-shaped, and a stepped hole for mounting the adjusting screw 8 is provided in the axial direction on the cylinder head 9 .

[0035] The large end of the adjusting screw 8 is threadedly connected to the large hole portion of the step hole, and an O-ring 12 is installed between the small end of the adjusting screw 8 and the small hole portion of the step hole; the sealing and axially adjustable installation of the adjusting screw 8 on the cylinder head 9 are realized, and the structure is simple and reliable.

[0036] An annular groove for accommodating an O-ring 12 is provided on the inner wall surface of the small hole portion of the step hole, and the O-ring 12 and the retaining ring 13 are installed in parallel in the annular groove, which effectively ensures the sealing reliability between the adjusting screw 8 and the cylinder head 9, and the installation reliability of the O-ring 12 is ensured by the retaining ring 13; the large hole portion of the step hole located on the outer side of the large end of the adjusting screw 8 is installed with a hole elastic retaining ring 11, which effectively prevents the adjusting screw 8 from accidentally disengaging through the hole elastic retaining ring 11.

[0037] The hole elastic circlip 11 is annular in structure, and the inner diameter of the hole elastic circlip 11 is smaller than the diameter of the large end of the adjusting screw 8; a hole matching with an external tool is opened in the center of the large end of the adjusting screw 8.

[0038] In actual operation, an external tool, such as a screwdriver, can be used to pass through the hole with the elastic ring 11 and then extend into the hole at the end of the adjusting screw 8. The adjusting screw 8 can be rotated to adjust the screw 8 relative to the cylinder head 9 to achieve adjustment, which is easy to operate.

[0039] The utility model can realize the adjustment of the swing angle of the swing cylinder, is easy to operate, is particularly suitable for adjustment and maintenance operations during actual use, effectively improves the flexibility of actual use, and has good practicality.

[0040] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0041] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the scope of protection of the utility model.

Claims

1. An angle-adjustable double-rack swing cylinder, characterized by: The invention comprises a box body (4), wherein cylinder barrel 1 (2) and cylinder barrel 2 (7) are coaxially mounted on both sides of the box body (4), forming a cylinder body that is communicated with each other internally; the cylinder body comprises two cylinder bodies arranged in parallel and spaced apart, wherein a piston rod (3) is slidably mounted inside a single cylinder body, and a gear (10) is rotatably mounted inside the box body (4), wherein the gear (10) is located between the two piston rods (3), and the gear (10) is circumferentially located on both sides of the same diameter and is respectively engaged with the two piston rods (3) through toothed meshing; a cylinder bottom (21) is respectively mounted on the end of cylinder barrel 1 (2) in the two cylinder bodies, and a cylinder head (9) is respectively mounted on the end of cylinder barrel 2 (7); and an adjusting screw (8) is mounted inwardly on the end of the cylinder head (9).

2. The angle-adjustable double-rack swing cylinder according to claim 1, characterized in that: Liquid is taken in and out of the cylinder barrel 2 (7) of the two cylinder bodies on the same side in turn, and the engagement of the piston rod (3) with the gear (10) causes the two piston rods (3) to move in opposite directions along their respective cylinder bodies at the same time.

3. The angle-adjustable double-rack swing cylinder according to claim 1, characterized in that: The inner wall of the box body (4) between the cylinder barrel 1 (2) and the cylinder barrel 2 (7) is equipped with a bearing bush, and the two ends of the piston rod (3) are respectively positioned in the cylinder barrel 1 (2) and the cylinder barrel 2 (7) by the bearing bush.

4. The angle-adjustable double-rack swing cylinder according to claim 3, characterized in that: The ends of the piston rod (3) located in the cylinder barrel 1 (2) and the cylinder barrel 2 (7) are respectively fitted with guide sleeves (5). The outer diameter of the guide sleeve (5) is larger than the inner diameter of the bearing bush. A sealing ring is pressed between the circumferential outer wall of the guide sleeve (5) and the inner wall of the corresponding cylinder barrel 1 (2) or the inner wall of the cylinder barrel 2 (7).

5. The angle-adjustable double-rack swing cylinder according to claim 1, characterized in that: A fixing screw (1) is installed along the axial center of the end of the piston rod (3) located in the cylinder barrel (2).

6. The angle-adjustable double-rack swing cylinder according to claim 1, characterized in that: A buffer rod (6) is installed at the end of the piston rod (3) located in the second cylinder barrel (7). The buffer rod (6) is in a T-shaped structure facing the cylinder head (9). The end of the buffer rod (6) extends into the cylinder head (9) and abuts against the inner end of the adjusting screw (8).

7. The angle-adjustable double-rack swing cylinder according to claim 1, characterized in that: The axial cross section of the adjusting screw (8) is in a T-shaped structure, and a stepped hole for assembling the adjusting screw (8) is provided on the cylinder head (9) along the axial direction.

8. The angle-adjustable double-rack swing cylinder according to claim 7, characterized in that: The large end of the adjusting screw (8) is threadedly connected to the large hole portion of the step hole, and an O-ring (12) is installed between the small end of the adjusting screw (8) and the small hole portion of the step hole.

9. The angle-adjustable double-rack swing cylinder according to claim 8, characterized in that: An annular groove for accommodating an O-ring (12) is provided on the inner wall surface of the small hole portion of the step hole, and the O-ring (12) and the retaining ring (13) are installed in parallel in the annular groove; and an elastic retaining ring (11) for the hole is installed on the large hole portion of the step hole located outside the large end of the adjusting screw (8).

10. The angle-adjustable double-rack swing cylinder according to claim 9, characterized in that: The hole elastic circlip (11) is an annular structure, and the inner diameter of the hole elastic circlip (11) is smaller than the diameter of the large end of the adjusting screw (8); a hole matching an external tool is opened at the center of the large end of the adjusting screw (8).

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